local  warn_mark = Untranslated("<color 255 140 0>!</color>")
local   err_mark = Untranslated("<color 240 0 0>!!</color>")
local dirty_mark = Untranslated("<color 240 0 0>*</color>")
local match_mark_text = "<color 0 196 0>•</color>"
local match_mark = Untranslated(match_mark_text)

local function get_warning_msg(obj_addr)
	return (Platform.ged and g_GedApp.connection:Obj("root|warnings_cache") or rawget(_G, "DiagnosticMessagesForGed") or empty_table)[obj_addr]
end

function TFormat.ged_marks(context_obj, obj_addr)
	local marks = ""
	
	-- Ged warning/error ! mark
	local msg = get_warning_msg(obj_addr)
	if msg then
		marks = marks .. (msg[#msg] == "warning" and warn_mark or err_mark)
	end
	
	-- Ged dirty * mark
	local dirty = Platform.ged and g_GedApp.connection:Obj("root|dirty_objects") or empty_table
	if dirty[obj_addr] then
		marks = marks .. dirty_mark
	end
	
	-- Mark for a match from "search values"
	for _, panel in pairs(Platform.ged and g_GedApp.interactive_panels) do
		local results = panel.search_value_results
		if results and type(results[obj_addr]) == "table" then
			marks = marks .. match_mark
			break
		end
	end
	return marks
end

local read_only_color = Untranslated("<color 150 150 150>")
local read_only_color_close = Untranslated("</color>")

-- <read_only(panel.context)>
-- The read_only tag is used to gray out all items in a ged panel whose context is read-only.
-- Currently this is useful to gray out a Container's sub-items (like Preset sub-items).
-- If you want to gray out only specific items that read-only in a panel whose context is NOT read-only 
-- use the Format property with a construct like <if(IsReadOnly)>...</if>
function TFormat.read_only(context_obj, context_name)
	local result = ""

	local read_only = (Platform.ged and context_name) and g_GedApp.connection:Obj(context_name .. "|read_only")
	if read_only then
		result = result .. read_only_color
	end
	
	return result
end

-- </read_only(panel.context)>
-- Closes a read_only tag.
TFormat["/read_only"] = function(context_obj, context_name)
	local result = ""
	
	local read_only = (Platform.ged and context_name) and g_GedApp.connection:Obj(context_name .. "|read_only")
	if read_only then
		result = result .. read_only_color_close
	end
	
	return result
end


----- GedPanelBase, used by all panels and GedPropNestedList

local reCommaList = "([%w_]+)%s*,%s*"

DefineClass.GedPanelBase = {
	__parents = { "XControl", "XContextWindow" },
	properties = {
		{ category = "Interaction", id = "Collapsible", editor = "bool", default = false, help = "Allows the panel to be collapsed and expanded." },
		{ category = "Interaction", id = "StartsExpanded", editor = "bool", default = false, help = "Controls if the panel is initially collapsed or expanded." },
		{ category = "Interaction", id = "ExpandedMessage", editor = "text", default = "", help = "Dimmed help message to display right-aligned in the panel's title when it is expanded." },
		{ category = "Interaction", id = "EmptyMessage", editor = "text", default = "", help = "Dimmed help message to display right-aligned in the panel's title when it is empty." },
	},
	Embedded = false,
	Interactive = false, -- interactive panels have selection and store/restore state (see GedApp)
	MatchMark = match_mark_text,
	focus_column = 1,
	connection = false,
	app = false,
}

function GedPanelBase:Init(parent, context)
	assert(not context or type(context) == "string") -- context is the bind name of the object displayed
	self.app = GetParentOfKind(self.parent, "GedApp")
	self.connection = self.app and self.app.connection
	self.app:AddPanel(self.context, self)
end

function GedPanelBase:Done()
	if self.app.window_state ~= "destroying" then
		self:UnbindViews()
		self.app:RemovePanel(self)
	end
end

function GedPanelBase:SetPanelFocused()
end

function GedPanelBase:GetSelection()
	return false
end

function GedPanelBase:GetMultiSelection()
	return false
end

function GedPanelBase:SetSelection(...)
end

function GedPanelBase:OnSelection(selection)
end

function GedPanelBase:TryHighlightSearchMatch()
	-- no search support in GetPanelBase
end

function GedPanelBase:CancelSearch(dont_select)
	-- no search support in GetPanelBase
end

function GedPanelBase:GetState()
	return { selection = table.pack(self:GetSelection()) }
end

function GedPanelBase:Obj(name)
	return self.connection.bound_objects[name]
end

function GedPanelBase:BindView(suffix, func_name, ...)
	local name = self.context
	self.connection:BindObj(name .. "|" .. suffix, name, func_name, ...)
end

function GedPanelBase:UnbindView(suffix)
	local name = self.context
	self.connection:UnbindObj(name .. "|" .. suffix)
end

function GedPanelBase:BindViews()
end

function GedPanelBase:UnbindViews()
	local name = self.context
	if name then
		self.connection:UnbindObj(name)
		self.connection:UnbindObj(name .. "|", "") -- unbind all views
		self:SetContext(false)
	end
end

function GedPanelBase:OnContextUpdate(context, view)
	self:SetVisible(true)
	if view == nil then
		self:BindViews()
	end
	self.app:CheckUpdateItemTexts(view)
end

function GedPanelBase:OnSetFocus()
	if self.app:SetLastFocusedPanel(self) then
		self:BindSelectedObject(self:GetSelection())
	end
end

function GedPanelBase:BindSelectedObject(selected_item)
end

function GedPanelBase:Op(op_name, obj, ...)
	self.app:Op(op_name, obj, ...)
end

function GedPanelBase:Send(rfunc_name, ...)
	self.app:Send(rfunc_name, ...)
end

function GedPanelBase:UpdateItemTexts()
	-- used to refresh all texts so that their warning statuses get updated (see TFormat.diagnmsg)
end

local function get_warning_nodes(self)
	-- see Preset's Warning property
	local warning_data = self:Obj(self.context .. "|warning")
	if type(warning_data) == "table" then
		local warning_idxs = {}
		for i = 3, #warning_data do
			table.insert(warning_idxs, warning_data[i])
		end
		return warning_idxs
	end
	return empty_table
end


----- Ops for common actions per panel type and class

local common_action_ops = {
	GedListPanel = {
		None = {},
		PropertyObject = {
			MoveUp    = "GedOpListMoveUp",
			MoveDown  = "GedOpListMoveDown",
			Delete    = "GedOpListDeleteItem",
			Cut       = "GedOpListCut",
			Copy      = "GedOpListCopy",
			Paste     = "GedOpListPaste",
			Duplicate = "GedOpListDuplicate",
		},
		Object = {
			Delete    = "GedOpListDeleteItem",
			Cut       = "GedOpObjectCut",
			Copy      = "GedOpObjectCopy",
			Paste     = "GedOpObjectPaste",
			Duplicate = "GedOpObjectDuplicate",
		},
	},
	GedTreePanel = {
		None = {},
		PropertyObject = {
			MoveUp    = "GedOpTreeMoveItemUp",
			MoveDown  = "GedOpTreeMoveItemDown",
			MoveOut   = "GedOpTreeMoveItemOutwards",
			MoveIn    = "GedOpTreeMoveItemInwards",
			Delete    = "GedOpTreeDeleteItem",
			Cut       = "GedOpTreeCut",
			Copy      = "GedOpTreeCopy",
			Paste     = "GedOpTreePaste",
			Duplicate = "GedOpTreeDuplicate",
		},
		Preset = {
			Delete    = "GedOpPresetDelete",
			Cut       = "GedOpPresetCut",
			Copy      = "GedOpPresetCopy",
			Paste     = "GedOpPresetPaste",
			Duplicate = "GedOpPresetDuplicate",
		},
	},
	GedPropPanel = {
		None = {},
		PropertyObject = {
			Copy      = "GedOpPropertyCopy",
			Paste     = "GedOpPropertyPaste",
		},
	},
}


----- GedPanel

local function op_readonly(self, prop_meta) return self:GetProperty(prop_meta.id) == GedDisabledOp end
local function op_noedit(self, prop_meta) return not common_action_ops[rawget(self, "__class") or self.class] end
local op_edit_button = {{
	name = "Edit", func = "OpEdit",
	is_hidden = function(obj, prop_meta) return obj:GetProperty(prop_meta.id) ~= GedDisabledOp end
}}

DefineClass.GedPanel = {
	__parents = { "GedPanelBase" },
	properties = {
		{ category = "General", id = "Title", editor = "text", default = "<class>", },
		{ category = "General", id = "TitleFormatFunc", editor = "text", default = "GedFormatObject", },
		{ category = "General", id = "EnableSearch", editor = "bool", default = false, },
		{ category = "General", id = "SearchHistory", editor = "number", default = 0 },
		{ category = "General", id = "SearchValuesAvailable", editor = "bool", default = false },
		{ category = "General", id = "PersistentSearch", editor = "bool", default = false },
		{ category = "General", id = "Predicate", editor = "text", default = "", help = "This object member function controls whether the panel is visible" },
		{ category = "General", id = "DisplayWarnings", editor = "bool", default = true, },
		
		{ category = "Common Actions", id = "ActionsClass", editor = "choice", default = "None", no_edit = op_noedit,
		  items = function(self) return table.keys2(common_action_ops[rawget(self, "__class") or self.class] or { None = true }, "sorted") end },
		{ category = "Common Actions", id = "MoveUp",    editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "MoveDown",  editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "MoveOut",   editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "MoveIn",    editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "Delete",    editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "Cut",       editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "Copy",      editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "Paste",     editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		{ category = "Common Actions", id = "Duplicate", editor = "text", default = GedDisabledOp, read_only = op_readonly, no_edit = op_noedit, buttons = op_edit_button },
		
		{ category = "Context Menu", id = "ActionContext", editor = "text", default = "" },
		{ category = "Context Menu", id = "SearchActionContexts", editor = "string_list", default = false,},
	},
	IdNode = true,
	HAlign = "stretch",
	VAlign = "stretch",
	Padding = box(2, 2, 2, 2),
	Background = RGB(255, 255, 255),
	FocusedBackground = RGB(255, 255, 255),
	MinWidth = 300,
	MaxWidth = 100000,
	
	ContainerControlClass = "XScrollArea",
	HorizontalScroll = false,
	Translate = false,
	documentation_btn = false,
	test_btn = false,
	expanded = true, -- panels with Collapsible == true can be expanded/collapsed
	search_popup = false,
	search_values = false,
	search_value_results = false,
	read_only = false,
}

function GedPanel:OnXTemplateSetProperty(prop_id, old_value, ged)
	if prop_id == "__class" or prop_id == "ActionsClass" then
		local data = common_action_ops[self.__class]
		if prop_id == "__class" then -- reset to default ops for that panel class
			self.ActionsClass = data and "PropertyObject" or "None"
		end
		
		local ops = data and data[self.ActionsClass] or empty_table
		for _, op in ipairs(GedCommonOps) do
			self:SetProperty(op.Id, ops[op.Id] or GedDisabledOp)
		end
	end
end

function GedPanel:OpEdit(root, prop_id, ged, param)
	self:SetProperty(prop_id, "")
	ObjModified(self)
end

function GedPanel:ToggleSearch()
	if self.idSearchContainer:GetVisible() then
		self:CloseSearch()
	else
		self:OpenSearch()
	end
end

function GedPanel:SaveSearchToggled(value)
	local settings = self.app.settings or {}
	local opened_panels = settings.opened_panels or {}
	if value ~= nil then
		opened_panels[self.Id] = value
	end
	settings.opened_panels = opened_panels
	self.app.settings = settings
	return opened_panels[self.Id]
end

function GedPanel:OpenSearch()
	if not self:IsSearchAvailable() then return end
	
	local search = self.idSearchContainer
	if not search.visible then
		search:SetDock("top")
		search:SetVisible(true)
	end
	self.idSearchEdit:SetFocus()
	self.idSearchEdit:SelectAll()
	self:SaveSearchToggled(true)
end

function GedPanel:CloseSearch()
	local search = self.idSearchContainer
	if not search.visible then return end
	search:SetDock("ignore")
	search:SetVisible(false)
	if self.idSearchEdit:GetText() ~= "" then
		self:UpdateFilter()
	end
	self:SaveSearchToggled(false)
	return true
end

function GedPanel:CancelSearch(dont_select)
	if not self.idSearchContainer:GetVisible() then
		return false
	end
	if self.PersistentSearch then
		if self.idSearchEdit:GetText() ~= "" then
			self.idSearchEdit:SetText("")
			self.app.search_value_filter_text = ""
			self.app:TryHighlightSearchMatchInChildPanels(self) -- clear highlights when search is canceled
			self:UpdateFilter()
		elseif not self.idContainer:IsFocused(true) then
			if not dont_select then
				self:FocusFirstEntry()
			end
		else
			self.idSearchEdit:SetFocus()
			self.idSearchEdit:SelectAll()
		end
		return true
	else
		return self:CloseSearch()
	end
end

function GedPanel:UpdateFilter()
end

function GedPanel:FocusFirstEntry()
end

function GedPanel:GetFilterText()
	local search = self.idSearchContainer
	if not search or not search.visible then
		return ""
	end
	return string.lower(self.idSearchEdit:GetText())
end

function GedPanel:GetHighlightText()
	local app = self.app
	return app.search_value_results and app.search_value_filter_text
end

function GedPanel:OnShortcut(shortcut, source, ...)
	if shortcut == "Escape" and self:CancelSearch() then
		return "break"
	end
	
	local app = self.app
	local search_panel = app.search_value_panel
	if app.search_value_results and search_panel then
		if shortcut == "F4" then
			search_panel:NextMatch(1)
			return "break"
		elseif shortcut == "Shift-F4" then
			search_panel:NextMatch(-1)
			return "break"
		elseif shortcut == "F5" then
			search_panel:StartUpdateFilterThread()
			return "break"
		end
	end
end

function GedPanel:IsSearchAvailable()
	return self.EnableSearch and not self.Embedded
end

function GedPanel:UpdateSearchVisiblity()
	local enabled = self.EnableSearch and not self.Embedded
	if not enabled then
		self:CloseSearch()
	end
	self.idToggleSearch:SetVisible(enabled)
	self.idToggleSearch:SetDock(enabled and "right" or "ignore")

	self:UpdateSearchContextMenu(self:GetSearchActionContexts()) -- updates "Search" action
end

function GedPanel:SetSearchActionContexts(search_contexts)
	if not search_contexts or type(search_contexts) ~= "table" then return end
	
	self:UpdateSearchContextMenu(search_contexts)
end

function GedPanel:UpdateSearchContextMenu(new_contexts)
	-- Attach search to the context menu
	if not new_contexts or type(new_contexts) ~= "table" or #new_contexts == 0 then return end
	
	local host = GetActionsHost(self)
	if not host then return end
	local search_action = host:ActionById("idSearch")
	if not search_action then return end
	local contexts = search_action.ActionContexts
	if not contexts then return end
	
	local old_contexts = self:GetSearchActionContexts()
	if old_contexts and #old_contexts ~= 0 then
		for _, old in ipairs(old_contexts) do 
			table.remove_entry(contexts, old)
		end
	end
	
	local search_enabled = self.EnableSearch and not self.Embedded
	if search_enabled then
		for _, new in ipairs(new_contexts) do 
			table.insert(contexts, new)
		end
	end
	
	self.SearchActionContexts = new_contexts
end

function GedPanel:AddToSearchHistory(text)
	local settings = self.app.settings or {}
	settings.search_history = settings.search_history or {}
	local history_list = settings.search_history[self.Id] or {}
	if text and #text:trim_spaces() > 0 then
		table.remove_value(history_list, text)
		table.insert(history_list, 1, text)
		if #history_list > self.SearchHistory then
			table.remove(history_list, #history_list)
		end
	end
	settings.search_history[self.Id] = history_list
	self.app.settings = settings
	return history_list
end

function GedPanel:OpenSearchHistory(keyboard)
	local popup = XPopupList:new({
		LayoutMethod = "VList",
	}, self.desktop)
	
	local history = self:AddToSearchHistory(nil)
	if #history > 0 then
		for idx, item in ipairs(history) do
			local entry = XTemplateSpawn("XComboListItem", popup.idContainer, self.context)
			entry:SetFocusOrder(point(1, idx))
			entry:SetFontProps(XCombo)
			entry:SetText(item)
			entry:SetMinHeight(entry:GetFontHeight())
			entry.OnPress = function(entry)
				self.idSearchEdit:SetText(item)
				self:AddToSearchHistory(item)
				if popup.window_state ~= "destroying" then
					popup:Close()
				end
			end
		end
	else
		XText:new({}, popup.idContainer):SetText("No history.")
	end
	popup:SetAnchor(self.idSearchContainer.box)
	popup:SetAnchorType("drop")
	popup:Open()
	if keyboard and #history > 0 then 
		popup.idContainer[1]:SetFocus()
	end
	self.search_popup = popup
	self.app:UpdateChildrenDarkMode(popup)
end

function GedPanel:InitControls()
	self.expanded = self.StartsExpanded
	
	XWindow:new({
		Id = "idTitleContainer",
		Dock = "ignore", -- see OnContextUpdate
		Background = RGB(196, 196, 196),
		HandleMouse = true,
	}, self):SetVisible(false)
	
	local search_container
	if self.SearchValuesAvailable then
		assert(self.PersistentSearch)
		XWindow:new({
			Id = "idSearchContainer",
			Dock = "ignore",
		}, self):SetVisible(false)
		search_container = XWindow:new({
			BorderWidth = 1,
		}, self.idSearchContainer)
		
		self:CreateSearchResultsPanel()
		
		local search_toggle = XTemplateSpawn("GedToolbarToggleButtonSmall", self.idSearchContainer)
		search_toggle:SetId("idSearchValuesButton")
		search_toggle:SetIcon("CommonAssets/UI/Ged/log-dataset.tga")
		search_toggle:SetRolloverText(Untranslated("Toggle search in properties and sub-objects"))
		search_toggle:SetMargins(box(2, 0, 0, 0))
		search_toggle.OnPress = function() return self:ToggleSearchValues() end
	else
		search_container = XWindow:new({
			Id = "idSearchContainer",
			Dock = "ignore",
			BorderWidth = 1,
			Background = RGB(255, 255, 255),
		}, self)
		search_container:SetVisible(false)
	end
	
	local button = XTemplateSpawn("XComboButton", search_container, self.context)
	button:SetId("idSearchHistory")
	button:SetMargins(empty_box)
	button:SetVisible(self.SearchHistory > 0)
	button.OnPress = function(button)
		if not self.search_popup or self.search_popup.window_state ~= "open" then
			self:PopulateSearchValuesCache()
			self:OpenSearchHistory()
		else
			self.search_popup:Close()
		end
	end
	button.FoldWhenHidden = true
	XTextButton:new({
		Id = "idCancelSearch",
		Dock = "right",
		VAlign = "center",
		Text = "x",
		MaxWidth = 20,
		MaxHeight = 16,
		LayoutHSpacing = 0,
		BorderWidth = 0,
		Background = RGBA(0, 0, 0, 0),
		RolloverBackground = RGB(204, 232, 255),
		PressedBackground = RGB(121, 189, 241),
		OnPress = function() self:CancelSearch() end,
		FoldWhenHidden = true,
	}, search_container)
	self.idCancelSearch:SetVisible(false)
	XEdit:new({
		Id = "idSearchEdit",
		Dock = "box",
		Hint = "Search...",
		BorderWidth = 0,
		Background = RGBA(0, 0, 0, 0),
		AllowEscape = false,
		OnTextChanged = function(edit)
			XEdit.OnTextChanged(edit)
			self:StartUpdateFilterThread()
			if edit:GetText() ~= "" then
				self:SetSelection(false)
			end
			self.idCancelSearch:SetVisible(edit:GetText() ~= "")
		end,
		OnShortcut = function(edit, shortcut, source, ...)
			local result = XEdit.OnShortcut(edit, shortcut, source, ...)
			if result == "break" then return result end
			if shortcut == "Down" or shortcut == "Enter" then
				if shortcut == "Down" and self.SearchHistory > 0 and edit:GetText() == "" then
					self:OpenSearchHistory("keyboard")
					return "break"
				else
					self:FocusFirstEntry()
					return shortcut == "Down" and "break" -- allow Enter to open console, e.g. when typing in Inspector's search
				end
			end
		end,
		OnSetFocus = function(edit)
			self:PopulateSearchValuesCache()
			return XEdit.OnSetFocus(edit)
		end,
		OnKillFocus = function(edit, new_focus)
			self:AddToSearchHistory(edit:GetText())
			return XEdit.OnKillFocus(edit, new_focus)
		end,
	}, search_container)
	
	local search_button = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
	search_button:SetId("idToggleSearch")
	search_button:SetIcon("CommonAssets/UI/Ged/view.tga")
	search_button:SetRolloverText("Search (Ctrl-F)")
	search_button:SetBackground(self.idTitleContainer:GetBackground())
	search_button.OnPress = function() self:ToggleSearch() end
	--- End search controls

	XText:new({
		Id = "idTitle",
		Dock = "box",
		ZOrder = 1000,
		Margins = box(2, 1, 2, 1),
		TextStyle = self.Collapsible and "GedDefault" or "GedTitleSmall",
		HandleMouse = self.Collapsible,
		Translate = true,
		OnMouseButtonDown = function(button, pt, button)
			if self.Collapsible and button == "L" and
			   not terminal.IsKeyPressed(const.vkShift) and
			   not terminal.IsKeyPressed(const.vkControl) then
				self:Expand(not self.expanded)
			end
		end,
	}, self.idTitleContainer)
	
	XText:new({
		Id = "idWarningText",
		Dock = "top",
		VAlign = "center",
		TextHAlign = "center",
		BorderWidth = 1,
		BorderColor = RGB(255, 0 , 0),
		Background = RGB(255, 196, 196),
		FoldWhenHidden = true,
	}, self)
	self.idWarningText:SetVisible(false)
	
	if self.HorizontalScroll then
		XSleekScroll:new({
			Id = "idHScroll",
			Target = "idContainer",
			Dock = "bottom",
			Margins = box(0, 2, 7, 0),
			Horizontal = true,
			AutoHide = true,
			FoldWhenHidden = true,
		}, self)
	end
	local vertical_scroll = _G[self.ContainerControlClass]:IsKindOf("XScrollArea")
	if vertical_scroll then
		XSleekScroll:new({
			Id = "idScroll",
			Target = "idContainer",
			Dock = "right",
			Margins = box(2, 0, 0, 0),
			Horizontal = false,
			AutoHide = true,
			FoldWhenHidden = true,
		}, self)
	end
	_G[self.ContainerControlClass]:new({
		Id = "idContainer",
		HAlign = "stretch",
		VAlign = "stretch",
		MinHSize = false,
		LayoutMethod = "VList",
		Padding = box(2, 2, 2, 2),
		BorderWidth = 0,
		HScroll = self.HorizontalScroll and "idHScroll" or "",
		VScroll = vertical_scroll and "idScroll" or "",
		FoldWhenHidden = true,
		RolloverTemplate = "GedPropRollover",
		Translate = self.Translate,
	}, self)
	self.idContainer.OnSetFocus = function() self:OnSetFocus() end -- fix for edge case with one panel docked in another one
	
	self:UpdateSearchVisiblity()
end

function GedPanel:GetTitleView()
	return self.TitleFormatFunc .. "." .. self.Title -- generate unique view id, to make sure different panels won't clash
end

function GedPanel:Open(...)
	self:InitControls()

	XWindow.Open(self, ...)
	
	if self.context then
		self:BindViews()
		if self.Title ~= "" then
			self:BindView(self:GetTitleView(), self.TitleFormatFunc, self.Title)
		end
		if self.Predicate ~= "" then
			self:BindView("predicate", "GedExecMemberFunc", self.Predicate)
		end
		self:BindView("read_only", "GedGetReadOnly")
	end
	
	if self.PersistentSearch then
		if self:IsSearchAvailable() and not self.idSearchContainer:GetVisible() and self:SaveSearchToggled(nil) ~= false then
			self:OpenSearch()
		end
	end
end

function GedPanel:Expand(expand)
	self.expanded = expand
	self.idContainer:SetVisible(expand)
	self.idScroll:SetAutoHide(expand)
	self.idScroll:SetVisible(expand)
	if self.HorizontalScroll then
		self.idHScroll:SetAutoHide(expand)
		self.idHScroll:SetVisible(expand)
	end
	self:UpdateTitle(self.context)
end

function GedPanel:UpdateTitle(context)
	local title = self.Title ~= "" and self.Title ~= "<empty>" and self:Obj(context .. "|" .. self:GetTitleView()) or ""
	if self.Collapsible then
		if title == "" and self.Title ~= "<empty>" then title = "(no description)" end
		
		local match
		local obj_id = self:Obj(context)
		for _, panel in pairs(self.app.interactive_panels) do
			local res = panel.search_value_results
			if res and res[obj_id] then
				title = GedPanelBase.MatchMark .. title
				match = true
				break
			end
		end	
		
		local is_empty = self:IsEmpty()
		local corner_message = self.EmptyMessage
		if not is_empty then
			corner_message = (self.expanded and self.ExpandedMessage or "(click to expand)")
		end
		
		if not match then
			title = (not is_empty and (self.expanded and "- " or "+ ") or "") .. title
			if not self.Embedded then
				title = title .. "<right><color 128 128 128>" .. corner_message
			end
		end
	end
	self.idTitle:SetText(Untranslated(title))
	self.idTitleContainer:SetVisible(title ~= "")
	self.idTitleContainer:SetDock(title ~= "" and "top" or "ignore")
end

function GedPanel:OnContextUpdate(context, view)
	if not view then -- obj changed
		if self.Title ~= "" then
			self:BindView(self:GetTitleView(), self.TitleFormatFunc, self.Title)
		end
		if self.Predicate ~= "" then
			self:BindView("predicate", "GedExecMemberFunc", self.Predicate)
		end
		if self.DisplayWarnings and not self.app.actions_toggled["ToggleDisplayWarnings"] then
			self:BindView("warning", "GedGetWarning")
		end
		if not self.Embedded then
			self:BindView("read_only", "GedGetReadOnly")
		end
		self:BindView("documentationLink", "GedGetDocumentationLink")
		self:BindView("documentation", "GedGetDocumentation")
		
		if self.Collapsible then
			local obj_id = self:Obj(self.context)
			for _, panel in pairs(self.app.interactive_panels) do
				local results = panel.search_value_results
				if results and results[obj_id] then
					self.expanded = true
				end
			end
			self:Expand(self.expanded)
		end
	end
	if view == self:GetTitleView() then
		self:UpdateTitle(context)
	end
	if view == "predicate" then
		local predicate = self:Obj(context .. "|predicate")
		self:SetVisible(predicate)
		self:SetDock(not predicate and "ignore")
	end
	if view == "warning" and self.DisplayWarnings then
		local warning = self:Obj(context .. "|warning")
		self.idWarningText:SetVisible(warning)
		self.idWarningText:SetTextColor(RGB(0, 0, 0))
		self.idWarningText:SetRolloverTextColor(RGB(0, 0, 0))
		if type(warning) == "table" then
			self.idWarningText:SetText(warning[1])
			local color = warning[2]
			if color == "warning" then color = RGB(255, 140, 0) end
			if color == "error" then color = RGB(255, 196, 196) end
			
			if color then
				local r, g, b = GetRGB(color)
				local max = Max(Max(r, g), b)
				self.idWarningText:SetBackground(color)
				self.idWarningText:SetBorderColor(RGB(r == max and r or r / 4, g == max and g or g / 4, b == max and b or b / 4))
			else
				self.idWarningText:SetBackground(RGB(255, 196, 196))
				self.idWarningText:SetBorderColor(RGB(255, 0 , 0))
			end
		else
			self.idWarningText:SetText(warning)
			self.idWarningText:SetBackground(RGB(255, 196, 196))
			self.idWarningText:SetBorderColor(RGB(255, 0 , 0))
		end
	end
	if (view or ""):starts_with("documentation") then
		local documentation = self:Obj(context .. "|documentation")
		local doc_link = self:Obj(context .. "|documentationLink")
		if (documentation or doc_link or "") ~= "" then
			if not self.documentation_btn then
				self.documentation_btn = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
				self.documentation_btn:SetIcon("CommonAssets/UI/Ged/help.tga")
				self.documentation_btn:SetZOrder(-1)
			end
			self.documentation_btn.OnPress = function(button)
				button:SetFocus()
				if (doc_link or "") ~= "" then
					local link = doc_link:starts_with("http") and doc_link or ("file:///" .. doc_link)
					OpenUrl(link, "force external browser")
				end
				button:SetFocus(false)
			end
			local rollover_text = ""
			if doc_link then
				rollover_text = string.format("Open  %s \n\n", doc_link)
			end
			rollover_text = rollover_text .. (documentation or "")
			self.documentation_btn:SetRolloverText(rollover_text)
			self.documentation_btn:SetVisible(true)
			
			if self.Embedded then
				if not self.test_btn then
					self.test_btn = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
					self.test_btn:SetIcon("CommonAssets/UI/Ged/play.tga")
					self.test_btn:SetZOrder(-1)
					self.test_btn:SetRolloverText("Run now!")
				end
				self.test_btn.OnPress = function(button)
					button:SetFocus()
					self:Send("GedTestFunctionObject", self.context)
					button:SetFocus(false)
				end
			end
		elseif self.documentation_btn then
			self.documentation_btn:SetVisible(false)
		end
	end
	if view == "read_only" then
		self.read_only = self:Obj(self.context .. "|read_only")
		self.app:ActionsUpdated()
	end
	GedPanelBase.OnContextUpdate(self, context, view)
end

function GedPanel:SetPanelFocused()
	return self.idContainer:SetFocus()
end

function GedPanel:ToggleSearchValues(no_settings_update)
	self.search_values = not self.search_values
	local button = self.idSearchValuesButton
	button:SetToggled(not button:GetToggled())
	self.idSearchEdit:SetFocus(false)
	self.idSearchEdit:SetFocus()
	self:StartUpdateFilterThread()
	
	if not no_settings_update then
		local settings = self.app.settings
		settings.search_in_props = settings.search_in_props or {}
		settings.search_in_props[self.context] = self.search_values
		self.app:SaveSettings()
	end
end

function GedPanel:StartUpdateFilterThread(not_user_initiated)
	if self.search_values and self.idSearchEdit:GetText() ~= "" then
		self.app:SetUiStatus("value_search_in_progress", "Searching...")
	end
	
	self:DeleteThread("UpdateFilterThread")
	self:CreateThread("UpdateFilterThread", function()
		Sleep(75)
		
		if self.search_values then
			local filter = self.idSearchEdit:GetText()
			self.search_value_results = filter ~= "" and self.connection:Call("rfnSearchValues", self.context, self:GetFilterText())
			if self.search_value_results == "timeout" then
				self.search_value_results = false
			end
			
			if self.PersistentSearch and not not_user_initiated then
				self:ShowSearchResultsPanel(self:GetFilterText(), self.search_value_results)
			end
		else
			self.search_value_results = nil
		end
		
		if self.window_state ~= "destroying" then
			self:UpdateFilter()
			for _, panel in pairs(self.app.interactive_panels) do
				if panel ~= self then
					panel:UpdateItemTexts()
				end
			end
			self.app:SetUiStatus("value_search_in_progress", false)
		end
	end)
end

function GedPanel:PopulateSearchValuesCache()
	if self.search_values then
		CreateRealTimeThread(function() self.connection:Call("rfnPopulateSearchValuesCache", self.context) end)
	end
end

function GedPanel:CreateSearchResultsPanel()
	XWindow:new({
		Id = "idSearchResultsPanel",
		Dock = "bottom",
		FoldWhenHidden = true,
		Padding = box(0, 1, 0, 1)
	}, self.idSearchContainer):SetVisible(false)

	local button = XTemplateSpawn("GedToolbarButtonSmall", self.idSearchResultsPanel)
	button:SetIcon("CommonAssets/UI/Ged/undo.tga")
	button:SetRolloverText("Refresh search results (F5)")
	button:SetDock("right")
	button.OnPress = function() self:StartUpdateFilterThread() end

	local button = XTemplateSpawn("GedToolbarButtonSmall", self.idSearchResultsPanel)
	button:SetIcon("CommonAssets/UI/Ged/up.tga")
	button:SetRolloverText("Previous match (Shift-F4)")
	button:SetDock("right")
	button.OnPress = function() self:NextMatch(-1) end
	
	local button = XTemplateSpawn("GedToolbarButtonSmall", self.idSearchResultsPanel)
	button:SetIcon("CommonAssets/UI/Ged/down.tga")
	button:SetRolloverText("Next match (F4)")
	button:SetDock("right")
	button.OnPress = function() self:NextMatch(1) end
	
	XText:new({
		Id = "idSearchResultsText",
		TextStyle = "GedDefault",
	}, self.idSearchResultsPanel)
end

function GedPanel:ShowSearchResultsPanel(filter, search_value_results)
	local app = self.app
	app.search_value_filter_text = filter
	app.search_value_results = search_value_results
	app.search_value_panel = self
	self.idSearchResultsPanel:SetVisible(search_value_results)
	if search_value_results then
		app.search_result_idx = 1
		self:NextMatch(0, "dont_unfocus_search_edit")
	end
end

function GedPanel:NextMatch(direction, dont_unfocus_search_edit)
	local app = self.app
	local count = #app.search_value_results
	app.search_result_idx = Clamp(app.search_result_idx + direction, 1, count)
	app.display_search_result = true
	self.idSearchResultsText:SetText(string.format("Match %d/%d", app.search_result_idx, count))
	
	local focus = self.desktop:GetKeyboardFocus()
	if not dont_unfocus_search_edit and focus.Id == "idSearchEdit" then
		self.desktop:RemoveKeyboardFocus(focus)
	end
	self:TryHighlightSearchMatch()
end

function GedPanel:FilterItem(text, item_id, filter_text)
	if filter_text == "" then return end
	if self.search_values then
		return not self.search_value_results or self.search_value_results.hidden[item_id or false]
	else
		text = IsT(text) and TDevModeGetEnglishText(text) or tostring(text):gsub("<[^>]+>", "")
		text = string.lower(text)
		return not text:find(filter_text, 1, true)
	end
end

function GedPanel:UpdateItemTexts()
	self:UpdateTitle(self.context)
end

function GedPanel:IsEmpty()
	-- override in child panels
end


----- GedPropPanel

DefineClass.GedPropPanel = {
	__parents = { "GedPanel" },
	properties = {
		-- internal use
		{ category = "General", id = "CollapseDefault", editor = "bool", default = false, no_edit = true, },
		{ category = "General", id = "ShowInternalNames", editor = "bool", default = false, no_edit = true, },
		{ category = "General", id = "EnableUndo", editor = "bool", default = true, },
		{ category = "General", id = "EnableCollapseDefault", editor = "bool", default = true, },
		{ category = "General", id = "EnableShowInternalNames", editor = "bool", default = true, },
		{ category = "General", id = "EnableCollapseCategories", editor = "bool", default = true, },
		{ category = "General", id = "HideFirstCategory", editor = "bool", default = false, },
		{ category = "General", id = "RootObjectBindName", editor = "text", default = false, },
		{ category = "General", id = "SuppressProps", editor = "prop_table", default = false, help = "Set of properties to skip in format { id1 = true, id2 = true, ... }." },
		
		{ category = "Context Menu" , id = "PropActionContext", editor = "text", default = "" },
	},
	MinWidth = 200,
	Interactive = true,
	EnableSearch = true,
	ShowUnusedPropertyWarnings = false,
	
	update_request = false,
	rebuild_props = true,
	prop_update_in_progress = false,
	parent_obj_id = false,
	parent_changed = false,
	parent_changed_notified = false,
	collapsed_categories = false,
	collapse_default_button = false,
	active_tab = "All",
	
	-- property selection
	selected_properties = false,
	last_selected_container_indx = false, 
	last_selected_property_indx = false, 
}

function GedPropPanel:InitControls()
	GedPanel.InitControls(self)

	self.idContainer:SetPadding(box(0, 3, 0, 0))
	self.idContainer:SetLayoutVSpacing(5)
	self.collapsed_categories = {}
	self.selected_properties = {}
	
	GedPanel.SetSearchActionContexts(self, self.SearchActionContexts) 
	
	local host = GetActionsHost(self)
	if not host:ActionById("EditCode") then
		XAction:new({
			ActionId = "EditCode",
			ActionContexts = { self.PropActionContext } ,
			ActionName = "Edit Code",
			ActionTranslate = false,
			OnAction = function(action, host)
				local panel = host:GetLastFocusedPanel()
				if IsKindOf(panel, "GedPropPanel") then
					self:Send("GedEditFunction", panel.context, panel:GetSelectedProperties())
				end
			end,
			ActionState = function(action, host)
				local panel = host:GetLastFocusedPanel()
				if not IsKindOf(panel, "GedPropPanel") then
					return "hidden"
				end
				local selected = panel.selected_properties
				if not selected or #selected ~= 1 then return "hidden" end
				local prop_meta = selected[1].prop_meta
				if prop_meta.editor ~= "func" and prop_meta.editor ~= "expression" and prop_meta.editor ~= "script" then
					return "hidden"
				end
			end,
		}, self)
	end
	
	local show_collapse_action = self.EnableCollapseDefault and not self.Embedded
	if show_collapse_action and not self.collapse_default_button then
		self.collapse_default_button = XTemplateSpawn("GedToolbarToggleButtonSmall", self.idTitleContainer)
		self.collapse_default_button:SetId("idCollapseDefaultBtn")
		self.collapse_default_button:SetIcon("CommonAssets/UI/Ged/collapse.tga")
		self.collapse_default_button:SetRolloverText(T(912785185075, "Hide/show all properties with default values"))
		self.collapse_default_button:SetBackground(self.idTitleContainer:GetBackground())
		self.collapse_default_button:SetToggled(self.CollapseDefault)
		self.collapse_default_button.OnPress = function(button)
			self:SetFocus()
			self:SetCollapseDefault(not self.CollapseDefault)
			button:SetToggled(not button:GetToggled())
		end
	end
	
	local show_internal_names_action = self.EnableShowInternalNames and not self.Embedded
	if show_internal_names_action then
		local show_internal_names_button = XTemplateSpawn("GedToolbarToggleButtonSmall", self.idTitleContainer)
		show_internal_names_button:SetId("idShowInternalNamesBtn")
		show_internal_names_button:SetIcon("CommonAssets/UI/Ged/log-focused.tga")
		show_internal_names_button:SetRolloverText(T(496361185046, "Hide/show internal names of properties"))
		show_internal_names_button:SetBackground(self.idTitleContainer:GetBackground())
		show_internal_names_button:SetToggled(self.ShowInternalNames)
		show_internal_names_button.OnPress = function(button) 
			self:ShowInternalPropertyNames(not self.ShowInternalNames)
			button:SetToggled(not button:GetToggled())
		end
	end
	
	if not self.Embedded then
		if self.EnableCollapseCategories then
			local button = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
			button:SetIcon("CommonAssets/UI/Ged/collapse_tree.tga")
			button:SetRolloverText("Expand/collapse categories (Shift-C)")
			button:SetBackground(self.idTitleContainer:GetBackground())
			button.OnPress = function() self:ExpandCollapseCategories() end
		end
	
		if self.app.PresetClass and self.DisplayWarnings then
			self.ShowUnusedPropertyWarnings = self.app.ShowUnusedPropertyWarnings
			
			local button = XTemplateSpawn("GedToolbarToggleButtonSmall", self.idTitleContainer)
			button:SetIcon("CommonAssets/UI/Ged/warning_button.tga")
			button:SetRolloverText("Show/hide unused property warnings")
			button:SetBackground(self.idTitleContainer:GetBackground())
			button:SetToggled(self.ShowUnusedPropertyWarnings)
			button.OnPress = function(button)
				self.ShowUnusedPropertyWarnings = not self.ShowUnusedPropertyWarnings
				button:SetToggled(not button:GetToggled())
				self:UpdatePropertyNames(self.ShowInternalNames)
			end
		end
	end
end

function GedPropPanel:Open(...)
	GedPanel.Open(self, ...)
	
	self:CreateThread("update", self.UpdateThread, self)
	GetActionsHost(self, true):ActionById("EditCode").ActionContexts = { self.PropActionContext }
end

function GedPropPanel:ShowInternalPropertyNames(value)
	if self.ShowInternalNames ~= value then
		self.ShowInternalNames = value
		self:UpdatePropertyNames(value)
	end
end

function GedPropPanel:SetSelection(properties)
	if not properties then return end
	self:ClearSelectedProperties()
	for con_indx, win in ipairs(self.idContainer) do
		for cat_indx, item in ipairs(win.idCategory) do
			for _, id in ipairs(properties) do
				if item.prop_meta.id == id then 
					self:AddToSelected(item, con_indx, cat_indx)
				end
			end
		end
	end
end

function GedPropPanel:OnMouseButtonDown(pos, button)
	local prop, container_indx, category_indx = self:GetGedPropAt(pos)
	local selected_props = self.selected_properties
	
	if button == "L" then
		self:SetFocus()
		self.app:SetLastFocusedPanel(self)
		if prop then 
			if #selected_props == 0 then
				self:AddToSelected(prop, container_indx, category_indx)
			else	
				if terminal.IsKeyPressed(const.vkControl) then -- Ctrl pressed
					if prop.selected then
						self:RemoveFromSelected(prop, container_indx, category_indx)
					else
						self:AddToSelected(prop, container_indx, category_indx)
					end
				elseif terminal.IsKeyPressed(const.vkShift) then -- Shift pressed
					self:ShiftSelectMultiple(prop, container_indx, category_indx)
				else
					local current_prop_selected = prop.selected
					self:ClearSelectedProperties()
					if not current_prop_selected then 
						self:AddToSelected(prop, container_indx, category_indx)
					end
				end
			end
		else
			self:ClearSelectedProperties()
		end
		return "break"
	elseif button == "R" then 
		self:SetFocus()
		local action_context = self:GetActionContext()
		if prop then 
			if #selected_props < 2 then
				self:ClearSelectedProperties()
				self:AddToSelected(prop, container_indx, category_indx)
			end
			action_context = self.PropActionContext
		end
		
		local host = GetActionsHost(self, true)
		if host then
			host:OpenContextMenu(action_context, pos)
		end
		return "break"
	end
end

function GedPropPanel:GetSelectedProperties()
	local selected_ids = {}
	for _, prop in ipairs(self.selected_properties) do
		table.insert(selected_ids, prop.prop_meta.id)
	end
	return selected_ids
end

function GedPropPanel:ShiftSelectMultiple(prop, container_indx, category_indx)
	self:ClearSelectedProperties("keep_last_selected_container_indx")

	--- default, when selection is in same container ---
	local con_indx = container_indx
	local max_con_indx = container_indx
	local cat_indx = category_indx
	local cat_max_indx = self.last_selected_property_indx
	if category_indx > self.last_selected_property_indx then
		cat_indx = self.last_selected_property_indx 
		cat_max_indx = category_indx
	end
	--- when selection is in different container ---
	if container_indx ~= self.last_selected_container_indx then
		if container_indx > self.last_selected_container_indx then
			con_indx = self.last_selected_container_indx 
			max_con_indx = container_indx 
			cat_indx = self.last_selected_property_indx 
			cat_max_indx = category_indx 
		else
			con_indx = container_indx
			max_con_indx = self.last_selected_container_indx 
			cat_indx = category_indx
			cat_max_indx = self.last_selected_property_indx
		end
	end
	
	local container = false
	local category_cnt = false
	local shift_select = true
	while shift_select do
		container = self.idContainer[con_indx]
		category_cnt = con_indx == max_con_indx and cat_max_indx or #container.idCategory
		if container.idCategory.visible then
			for i = cat_indx, category_cnt do
				self:AddToSelected(container.idCategory[i], self.last_selected_container_indx, self.last_selected_property_indx)
			end
		end
		con_indx = con_indx + 1
		cat_indx = 1
		if con_indx > max_con_indx then
			shift_select = false
		end		
	end
end
				
function GedPropPanel:OnShortcut(shortcut, source, ...)
	local res = GedPanel.OnShortcut(self, shortcut, source, ...)
	if res == "break" then return res end
	if shortcut == "Escape" or shortcut == "ButtonB" then
		self:ClearSelectedProperties()
	end
end

function GedPropPanel:ClearSelectedProperties(keep_last_selected)
	local selected_props = self.selected_properties
	for i = 1, #selected_props do
		selected_props[i]:SetSelected(false)
		selected_props[i] = nil
	end 
	if not keep_last_selected then
		self.last_selected_container_indx = false
		self.last_selected_property_indx = false
	end
end

function GedPropPanel:AddToSelected(prop, con_indx, prop_indx)
	prop:SetSelected(true)
	local selected_props = self.selected_properties
	assert(not table.find(selected_props, prop))
	selected_props[#selected_props + 1] = prop
	self.last_selected_container_indx = con_indx
	self.last_selected_property_indx = prop_indx
end

function GedPropPanel:RemoveFromSelected(prop, con_indx, prop_indx)
	prop:SetSelected(false)
	local selected_props = self.selected_properties
	local indx = table.find(selected_props, prop)
	assert(indx)
	selected_props[indx] = nil
	self.last_selected_container_indx = con_indx
	self.last_selected_property_indx = prop_indx
end

function GedPropPanel:GetGedPropAt(pt)
	for container_indx, container in ipairs(self.idContainer) do
		if container:HasMember("idCategory") and container.idCategory.visible then -- window which holds the GedPropEditors
			for gedprop_index, gedprop in ipairs(container.idCategory) do
				if gedprop:MouseInWindow(pt) then 
					return gedprop, container_indx, gedprop_index
				end 
			end
		end
	end
end

function GedPropPanel:SetCollapseDefault(value)
	if self.CollapseDefault ~= value then
		self.CollapseDefault = value
		self.rebuild_props = true
		self:RequestUpdate()
	end
end

function GedPropPanel:BindViews()
	if not self.context then return end
	
	-- ensures all views will be resent on rebind
	self:UnbindView("props")
	self:UnbindView("values")
	
	self:BindView("props", "GedGetProperties", self.SuppressProps)
	self:BindView("values", "GedGetValues")
end

function GedPropPanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	if view == nil then
		self.parent_obj_id = self.connection.bound_objects[context]
		self.parent_changed = true
		self.parent_changed_notified = true
		self.connection.bound_objects[context .. "|values"] = nil
		self:RequestUpdate()
	end
	if view == "values" then
		self.rebuild_props = self.rebuild_props or self.CollapseDefault
		self:RequestUpdate()
	end
	if view == "props" then
		self.rebuild_props = true
		self:RequestUpdate()
		self:RebuildTabs()
	end
end

function GedPropPanel:GetTabsData()
	local data = self:Obj(self.context .. "|props")
	local tabs = data and data.tabs
	if not tabs then return end
	
	-- list all categories not it any tabs in an Other tab; remove empty tabs
	if tabs[#tabs].TabName ~= "Other" then
		local categories = {}
		for _, prop in ipairs(data) do
			categories[prop.category or "Misc"] = true
		end
		local allcats = table.copy(categories)
		for i = #tabs, 1, -1 do
			local tab = tabs[i]
			local has_content
			for category in pairs(tab.Categories) do
				has_content = has_content or allcats[category]
				categories[category] = nil
			end
			if not has_content then
				table.remove(tabs, i)
			end
		end
		if self.app.PresetClass == "XTemplate" then
			categories.Template = nil -- skip Template as a special case for XTemplate Editor (too hard not to make this hack)
		end
		tabs[#tabs + 1] = { TabName = #table.keys(categories) == 1 and next(categories) or "Other", Categories = categories }
	end
	return tabs
end

function GedPropPanel:RebuildTabs()
	local container = rawget(self, "idTabContainer")
	if not container then
		container = XWindow:new({
			Id = "idTabContainer",
			LayoutMethod = "HList",
			Dock = "bottom",
			ZOrder = -1,
		}, self.idTitleContainer)
	end
	container:DeleteChildren()
	
	local tabs = self:GetTabsData()
	self.idContainer:SetLayoutVSpacing(tabs and 0 or 5)
	if not tabs then return end
	
	tabs = table.copy(tabs)
	table.insert(tabs, 1, { TabName = "All" })
	
	for _, tab in ipairs(tabs) do
		if tab.TabName == "All" or next(tab.Categories) then
			XToggleButton:new({
				Text = tab.TabName,
				Toggled = self.active_tab == tab.TabName,
				OnChange = function(button)
					self.active_tab = tab.TabName
					self:RebuildTabs()
					self:UpdateVisibility()
				end,
				Padding = box(2, 1, 2, 1),
				BorderWidth = 1,
			}, container)
		end
	end
	Msg("XWindowRecreated", container)
end

function GedPropPanel:RequestUpdate()
	self.update_request = true
	Wakeup(self:GetThread("update"))
end

local function is_slider_dragged()
	return IsKindOfClasses(terminal.desktop:GetMouseCapture(), "XSleekScroll", "XCurveEditor", "XCoordAdjuster")
end

function GedPropPanel:UpdateThread()
	while true do
		if not self.update_request then
			WaitWakeup()
			if self.app.window_state == "closing" or self.window_state == "destroying" or not self.context then return end
		end
		self.update_request = false
		self:ClearSelectedProperties()
		-- don't recreate property editors while the user is dragging a slider
		while is_slider_dragged() do
			if self.app.window_state == "closing" or self.window_state == "destroying" or not self.context then return end
			self:Update(false)
			Sleep(50)
		end
		if self.app.window_state == "closing" or self.window_state == "destroying" or not self.context then return end
		self:Update(self.rebuild_props)
	end
end

function GedPropPanel:RemoteSetProperty(obj, prop_id, value, parent_obj_id, slider_drag_id)
	local rebuild_pending = self.rebuild_props and not slider_drag_id -- see UpdateThread above
	if not rebuild_pending and not self.parent_changed and (parent_obj_id or false) == self.parent_obj_id then
		return self.app:Op("GedSetProperty", obj, prop_id, value, not self.EnableUndo, slider_drag_id or is_slider_dragged())
	end
end

function GedPropPanel:Update(rebuild_props)
	local has_values = self:Obj(self.context .. "|values")
	if has_values and rebuild_props then -- rebuild controls
		local scroll_pos = self.idScroll.Scroll
		self:RebuildControls()
		self.idScroll:ScrollTo(scroll_pos)
		self.rebuild_props = false
	else -- only update the values
		self.prop_update_in_progress = true
		for _, category_window in ipairs(self.idContainer) do
			if category_window:HasMember("idCategory") then
				for _, win in ipairs(category_window.idCategory) do
					if has_values then
						win:UpdateValue(self.parent_changed_notified)
					end
					win.parent_obj_id = self.parent_obj_id
				end
			end
		end
		self.prop_update_in_progress = false
	end
	if has_values then
		self.parent_changed_notified = false
	end
	self.parent_changed = false
	self:QueueReassignFocusOrders()
end

function GedPropPanel:ShouldShowButtonForFunc(func_name)
	if rawget(self.app, "suppress_property_buttons") then
		if table.find(self.app.suppress_property_buttons, func_name) then
			return
		end
	end
	return true
end

function GedPropPanel:QueueReassignFocusOrders(x, y)
	local obj = self
	while obj and obj.Embedded do
		obj = GetParentOfKind(obj.parent, "GedPropPanel")
	end
	
	if obj and not obj:IsThreadRunning("ReasignFocusOrders") then
		obj:CreateThread("ReasignFocusOrders", function() obj:ReassignFocusOrders(x, y) end)
	end
end

function GedPropPanel:UpdateFilter()
	self:UpdateVisibility()
end

local function find_parent_prop_panel(xcontrol)
	return (xcontrol:HasMember("panel") and xcontrol.panel) or 
			(xcontrol.parent and find_parent_prop_panel(xcontrol.parent))
end

function GedPropPanel:RebuildControls()
	-- gather the old prop editors for potential reuse
	local editors_by_hash = {}
	for _, category_window in ipairs(self.idContainer) do
		if category_window:HasMember("idCategory") then
			for _, editor in ipairs(category_window.idCategory) do
				local hash = xxhash(editor:GetContext(), table.hash(editor.prop_meta))
				assert(not editors_by_hash[hash])
				editors_by_hash[hash] = editor
				editor:DetachForReuse()
			end
		end
	end
	self.idContainer:Clear()
	
	-- find the results from a value search to highlight the matching properties
	local matching_props = {}
	local obj_id = self:Obj(self.context)
	for _, panel in pairs(self.app.interactive_panels) do
		local res = panel.search_value_results
		if res and type(res[obj_id]) == "table" then
			for idx, prop in ipairs(res[obj_id]) do
				matching_props[prop] = true
			end
			break
		end
	end	
	
	local categories = {}
	local sort_priority = 1
	local context = self.context
	local values = self:Obj(context .. "|values") or empty_table
	local props = self:Obj(context .. "|props") or empty_table
	if self.read_only then
		for idx, prop_meta in ipairs(props) do
			props[idx] = table.copy(prop_meta)
			props[idx].read_only = true
		end
	end
	table.stable_sort(props, function(a, b) return (a.sort_order or 0) < (b.sort_order or 0) end)
	
	local filter_text = self:GetFilterText()
	local focus = self.desktop.keyboard_focus
	local order = focus and focus:IsWithin(self) and focus:GetFocusOrder()
	local category_data = self:Obj("root|categories") or empty_table
	local parent_panel = find_parent_prop_panel(self) 
	local collapse_default = filter_text == "" and (self.CollapseDefault or (self.Embedded and parent_panel and parent_panel.CollapseDefault) )
	for _, prop_meta in ipairs(props) do
		if not collapse_default or prop_meta.editor == "buttons" or
			values[prop_meta.id] ~= nil and values[prop_meta.id] ~= prop_meta.default
		then
			local group
			local category = prop_meta.category or "Misc"
			local idx = table.find(categories, "category", category)
			if idx then
				group = categories[idx]
			else
				group = { prop_metas = {}, category = category, category_name = category, priority = sort_priority}
				sort_priority = sort_priority + 1
				local property_category = category_data and category_data[category]
				if property_category then
					group.category_name = _InternalTranslate(property_category.display_name, property_category)
					group.priority = group.priority + property_category.SortKey * 1000
				end
				table.insert(categories, group)
			end
			table.insert(group.prop_metas, prop_meta)
		end
	end
	
	if #categories == 0 then
		local text = XText:new({
			Id = "idNoPropsToShow",
			MaxWidth = 300,
			TextHAlign = "center",
		}, self.idContainer)
		text:SetText(collapse_default and "No properties with non-default value were found." or "There are no properties to show.")
		text:Open()
		goto cleanup
	end
	
	table.stable_sort(categories, function(a, b) return a.priority < b.priority end)
	for i, group in ipairs(categories) do
		local category_window = XWindow:new({
			IdNode = true,
			FoldWhenHidden = true,
		}, self.idContainer)
		local container = XWindow:new({
			Id = "idCategory",
			LayoutMethod = "VList",
			LayoutVSpacing = 0,
			FoldWhenHidden = true,
		}, category_window)
		local button = XTextButton:new({
			Id = "idCategoryButton",
			Dock = "top",
			FoldWhenHidden = true,
			LayoutMethod = "VList",
			Padding = box(2, 2, 2, 2),
			Background = RGBA(38, 146, 227, 255),
			FocusedBackground = RGBA(24, 123, 197, 255),
			DisabledBackground = RGBA(128, 128, 128, 255),
			OnPress = function(button)
				self:ExpandCategory(container, group.category, not container:GetVisible(), not self.Embedded and "save_settings")
			end,
			RolloverBackground = RGBA(24, 123, 197, 255),
			PressedBackground = RGBA(13, 113, 187, 255),
			Image = "CommonAssets/UI/round-frame-20.tga",
			ImageScale = point(500, 500),
			FrameBox = box(9, 9, 9, 9),
		}, category_window)
		button:SetTextStyle("GedButton")
		button:SetText(group.category_name)
		button:SetVisible(not self.HideFirstCategory or i ~= 1)
		if self.collapsed_categories[group.category] then
			container:SetVisible(false)
		end
		rawset(category_window, "category", group.category)
		category_window:Open()
		
		self.prop_update_in_progress = true
		
		local values_name = context .. "|values"
		for p, prop_meta in ipairs(group.prop_metas) do
			local editor_name = prop_meta.editor or prop_meta.type
			local editor_class = GedPropEditors[editor_name or false]
			if not editor_class then
				assert(editor_class ~= "objects", "Unknown prop editor name: " .. tostring(editor_name))
			elseif not g_Classes[editor_class] then
				assert(false, "Unknown prop editor class: " .. tostring(editor_class))
			else
				local context = self.context .. "." .. prop_meta.id
				local editor = editors_by_hash[xxhash(context, table.hash(prop_meta))]
				if editor then
					editor:SetParent(container)
					editor:SetContext(context)
				else
					editor = g_Classes[editor_class]:new({
						panel = self,
						obj = values_name,
					}, container, context, prop_meta)
					editor:Open()
				end
				editor:SetHighlightSearchMatch(matching_props[prop_meta.id])
				editor:UpdatePropertyNames(self.ShowInternalNames)
				editor:UpdateValue(true)
				editor.parent_obj_id = self.parent_obj_id
			end
		end
		
		self.prop_update_in_progress = false
	end
	
	self:UpdateVisibility()
	self:ReassignFocusOrders()
	focus = self:GetRelativeFocus(order, "nearest")
	if focus then
		focus:SetFocus()
	end
	
::cleanup::
	self:TryHighlightSearchMatch("skip_visibility_update")
	
	Msg("XWindowRecreated", self)
	for _, editor in pairs(editors_by_hash) do
		if not editor.parent then
			editor:delete()
		end
	end
end

function GedPropPanel:ReassignFocusOrders(x, y)
	x = x or self.focus_column
	y = y or 0
	
	if self.window_state == "destroying" then
		return y
	end
	
	for _, category_window in ipairs(self.idContainer) do
		if category_window:GetVisible() and category_window:HasMember("idCategory") then
			for _, prop_editor in ipairs(category_window.idCategory) do
				y = prop_editor:ReassignFocusOrders(x, y)
				assert(y)
			end
		end
	end
	return y
end

function GedPropPanel:UpdatePropertyNames(internal)
	for _, category_window in ipairs(self.idContainer) do
		for _, prop_editor in ipairs(rawget(category_window, "idCategory") or empty_table) do
			prop_editor:UpdatePropertyNames(internal)
		end
	end
end

function GedPropPanel:IsPropEditorVisible(prop_editor, filter_text, highlight_text)
	local tab = self.active_tab
	local tabs = self:GetTabsData()
	if tab ~= "All" and tabs then
		local prop = prop_editor.prop_meta
		local tab_data = table.find_value(tabs, "TabName", tab)
		if tab_data and not tab_data.Categories[prop.category or "Misc"] then
			return false
		end
	end
	return prop_editor:FindText(filter_text, highlight_text)
end

function GedPropPanel:UpdateVisibility()
	local values = self.context and self:Obj(self.context .. "|values")
	if not values then return end
	
	local filter_text = self:GetFilterText()
	local highlight_text = self:GetHighlightText()
	for _, category_window in ipairs(self.idContainer) do
		local hidden = 0
		local prop_editors = rawget(category_window, "idCategory") or empty_table
		for _, prop_editor in ipairs(prop_editors) do
			local visible = self:IsPropEditorVisible(prop_editor, filter_text, highlight_text)
			prop_editor:SetVisible(visible)
			if not visible then
				hidden = hidden + 1
			end
		end
		category_window:SetVisible(hidden ~= #prop_editors)
	end
end

function GedPropPanel:LocateEditorById(id)
	if self.window_state == "destroying" then return end
	for _, category_window in ipairs(self.idContainer) do
		if category_window:HasMember("idCategory") then
			for _, prop_editor in ipairs(category_window.idCategory) do
				if prop_editor.prop_meta.id == id then
					return prop_editor
				end
			end
		end
	end
end

function GedPropPanel:TryHighlightSearchMatch(skip_visibility_update)
	local match_data = self.app:GetDisplayedSearchResultData()
	local obj_id = self:Obj(self.context)
	if match_data and match_data.path[#match_data.path] == obj_id then
		if self.desktop:GetKeyboardFocus().Id ~= "idSearchEdit" then
			self:FocusPropEditor(match_data.prop)
		end
		self.app.display_search_result = false
	end
	if not skip_visibility_update then
		self:UpdateVisibility()
	end
end

function GedPropPanel:FocusPropEditor(prop_id)
	local old_focused = self.search_value_focused_prop_editor
	if old_focused and old_focused.parent and old_focused.window_state ~= "destroying" then
		old_focused:HighlightAndSelect(false)
	end
	
	local highlight_text = self:GetHighlightText()
	local prop_editor = self:LocateEditorById(prop_id)
	local focus = highlight_text and prop_editor and prop_editor:HighlightAndSelect(highlight_text)
	if focus then
		-- scroll the prop editor into the view
		local scrollarea = self.idContainer
		local parent = GetParentOfKind(scrollarea.parent, "XScrollArea")
		while parent do
			scrollarea = parent
			parent = GetParentOfKind(scrollarea.parent, "XScrollArea")
		end
		scrollarea:ScrollIntoView(focus)
	end
	self.search_value_focused_prop_editor = prop_editor
end

function GedPropPanel:ExpandCategory(container, category, expand, save_settings)
	self.collapsed_categories[category] = not expand
	if save_settings then
		self:SaveCollapsedCategories(self.context)
	end
	container:SetVisible(expand)
end

function GedPropPanel:SaveCollapsedCategories(key)
	local app = self.app
	local settings = app.settings.collapsed_categories or {}
	settings[key] = self.collapsed_categories
	app.settings.collapsed_categories = settings
	app:SaveSettings()
end

function GedPropPanel:ExpandCollapseCategories()
	if self.window_state == "destroying" then return end
	
	local has_expanded
	for _, category_window in ipairs(self.idContainer) do
		if category_window:HasMember("idCategory") and category_window.idCategory:GetVisible() then
			has_expanded = true
			break
		end
	end
	
	for _, category_window in ipairs(self.idContainer) do
		if category_window:HasMember("idCategory") then
			self:ExpandCategory(category_window.idCategory, category_window.category, not has_expanded, not "save_settings")
		end
	end
end


----- GedListPanel

DefineClass.GedListPanel = {
	__parents = { "GedPanel" },
	properties = {
		{ category = "General", id = "FormatFunc", editor = "text", default = "GedListObjects", },
		{ category = "General", id = "Format", editor = "text", default = "<name>", },
		{ category = "General", id = "AllowObjectsOnly", editor = "bool", default = false, },
		{ category = "General", id = "FilterName", editor = "text", default = "", },
		{ category = "General", id = "FilterClass", editor = "text", default = "", },
		{ category = "General", id = "SelectionBind", editor = "text", default = "", },
		{ category = "General", id = "OnDoubleClick", editor = "func", params = "self, item_idx", default = function(self, item_idx) end, },
		{ category = "General", id = "MultipleSelection", editor = "bool", default = false },
		
		{ category = "General", id = "EmptyText", editor = "text", default = "" },
		{ category = "General", id = "DragAndDrop", editor = "bool", default = false },
		
		{ category = "Common Actions", id = "ItemClass", editor = "expression", params = "gedapp", default = function(gedapp) return "" end, },
		{ category = "Context Menu", id = "ItemActionContext", editor = "text", default = "" },
	},
	ContainerControlClass = "XList",
	Interactive = true,
	EnableSearch = true,
	Translate = true,
	
	pending_update = false,
	pending_selection = false,
	restoring_state = false,
}

function GedListPanel:InitControls()
	GedPanel.InitControls(self)
	
	local list = self.idContainer
	list.OnSelection   = function(list, ...)          self:OnSelection(...)          end
	list.OnDoubleClick = function(list, item_idx)     self:OnDoubleClick(item_idx)   end
	list.CreateTextItem = function(list, ...) return  self:CreateTextItem(...)       end
	list:SetMultipleSelection(true)
	list:SetActionContext(self.ActionContext)
	list:SetItemActionContext(self.ItemActionContext)

	GedPanel.SetSearchActionContexts(self, self.SearchActionContexts)
end

function GedListPanel:Done()
	for bind in string.gmatch(self.SelectionBind .. ",", reCommaList) do
		self.connection:UnbindObj(bind)
	end
end

function GedListPanel:CreateTextItem(text, props, context)
	props = props or {}
	local item = XListItem:new({ selectable = props.selectable }, self.idContainer)
	props.selectable = nil
	local label = XText:new(props, item, context)
	label:SetText(text)
	item.idLabel = label
	if self.DragAndDrop then
		item.idDragAndDrop = GedListDragAndDrop:new({
			Dock = "box",
			List = self,
			Item = item,
		}, item)
	end
	return item
end

function GedListPanel:BindViews()
	if self.FilterName ~= "" and self.FilterClass then
		self.connection:BindFilterObj(self.context .. "|list", self.FilterName, self.FilterClass)
	end
	self:BindView("list", self.FormatFunc, self.Format, self.AllowObjectsOnly)
end

function GedListPanel:GetSelection()
	local selection = self.pending_selection or self.idContainer:GetSelection()
	if not selection or not next(selection) then return end
	return selection[1], selection
end

function GedListPanel:GetMultiSelection()
	return self.idContainer:GetSelection()
end

function GedListPanel:SetSelection(selection, multiple_selection, notify, restoring_state)
	if restoring_state or self.pending_update then
		self.pending_selection = multiple_selection or selection
		self.restoring_state = restoring_state
		return
	end
	self.idContainer:SetSelection(multiple_selection or selection, notify)
end

function GedListPanel:OnSelection(selected_item, selected_items)
	self:BindSelectedObject(selected_item, selected_items)
end

function GedListPanel:SetSelectionAndFocus(idx)
	local list = self.idContainer
	if list:GetSelection() == idx then
		self.app:TryHighlightSearchMatchInChildPanels(self)
	else
		-- focusing prevents issues with the focus restored to the leftmost panel (and selecting the wrong object) when cycling through search results
		local focus = self.desktop:GetKeyboardFocus()
		if not focus or focus.Id ~= "idSearchEdit" then
			self:SetFocus()
		end
		list:SetSelection(idx)
	end
end

function GedListPanel:TryHighlightSearchMatch()
	local obj_id = self:Obj(self.context)
	local match_data = self.app:GetDisplayedSearchResultData()
	if match_data then
		local match_path = match_data.path
		local match_idx = table.find(match_path, obj_id)
		if match_idx and match_idx < #match_path then
			local match_id = match_path[match_idx + 1]
			local list = self:Obj(self.context .. "|list")
			local ids = list.ids or empty_table
			for idx in ipairs(list) do
				if ids[idx] == match_id then
					self:SetSelectionAndFocus(idx)
					break
				end
			end
		end
	end
end

function GedListPanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	if view == nil then
		self.idContainer:SetSelection(false)
		self.pending_update = true
	end
	if view == "list" then
		self:UpdateContent()
		if self.search_values then
			self:StartUpdateFilterThread("not_user_initiated")
		end
		self:TryHighlightSearchMatch()
	end
	if view == "warning" and self.DisplayWarnings then
		self:UpdateContent() -- if the displayed items need to be underlined
	end
end

function GedListPanel:BindSelectedObject(selected_item, selected_indexes)
	if not selected_item then return end
	self.app:StoreAppState()
	for bind in string.gmatch(self.SelectionBind .. ",", reCommaList) do
		if self.MultipleSelection and selected_indexes and #selected_indexes > 1 then
			self.app:SelectAndBindMultiObj(bind, self.context, selected_indexes)
		else
			self.app:SelectAndBindObj(bind, { self.context, selected_item })
		end
	end
end

function GedListPanel:UpdateContent()
	if not self.context then return end
	local list = self:Obj(self.context .. "|list")
	if not list then
		self.idContainer:Clear()
		return
	end
	
	local sel = self.pending_selection or self.idContainer:GetSelection()
	local scroll_pos = self.idScroll.Scroll
	local filtered, ids = list.filtered, list.ids
	local filter_text = self:GetFilterText()
	if filter_text == "" then
		filter_text = false
	end
	local warning_idxs = self.DisplayWarnings and get_warning_nodes(self) or empty_table
	if #warning_idxs == 0 then
		warning_idxs = false
	end
	local container = self.idContainer
	container:Clear()
	local string_format = string.format
	for i, item_text in ipairs(list) do
		local str = "<literal(text,true)>"
		if warning_idxs and table.find(warning_idxs, i) then
			str = string_format("<underline>%s</underline>", str)
		end
		str = string.format("<read_only('%s')>%s</read_only('%s')>", self.context, str, self.context)
		local item_id = ids and ids[i]
		if item_id then
			str = string_format("<ged_marks('%s')>%s", item_id, str)
		end
		
		str = T{str, text = item_text, untranslated = true}
		local item = container:CreateTextItem(str, { Translate = true })
		if filtered and filtered[i] or filter_text and self:FilterItem(item_text, item_id, filter_text) then
			item:SetDock("ignore")
			item:SetVisible(false)
		end
	end

	if #list == 0 and self.EmptyText then
		self.idContainer:CreateTextItem(Untranslated(self.EmptyText), { Translate = true })
	end
	
	self.idScroll:ScrollTo(scroll_pos)
	self.idContainer:SetSelection(sel, self.pending_update and not self.restoring_state) -- notify only if selection is set externally
	self.pending_update = false
	self.pending_selection = false
	self.restoring_state = false
	Msg("XWindowRecreated", self)
end

function GedListPanel:FocusFirstEntry()
	for idx, value in ipairs(self.idContainer) do
		if value.Dock ~= "ignore" then
			self.idContainer:SetSelection(idx)
			break
		end
	end
	self:SetPanelFocused()
end

function GedListPanel:UpdateFilter()
	self:UpdateContent()
end

function GedListPanel:UpdateItemTexts()
	self:UpdateTitle(self.context)
	for _, item in ipairs(self.idContainer) do
		item[1]:SetText(item[1]:GetText())
	end
end

function GedListPanel:IsEmpty()
	local list = self:Obj(self.context .. "|list")
	return list and #list > 0
end


----- GedTreePanel

DefineClass.GedTreePanel = {
	__parents = { "GedPanel" },
	properties = {
		{ category = "General", id = "FormatFunc", editor = "text", default = "GedObjectTree", },
		{ category = "General", id = "Format", editor = "text", default = "<name>", },
		{ category = "General", id = "AltFormat", editor = "text", default = "", },
		{ category = "General", id = "AllowObjectsOnly", editor = "bool", default = false, },
		{ category = "General", id = "FilterName", editor = "text", default = "", },
		{ category = "General", id = "FilterClass", editor = "text", default = "", },
		{ category = "General", id = "SelectionBind", editor = "text", default = "", },
		{ category = "General", id = "OnSelectionChanged", editor = "func", params = "self, selection", default = function(self, selection) end, },
		{ category = "General", id = "OnCtrlClick", editor = "func", params = "self, selection", default = function(self, selection) end, },
		{ category = "General", id = "OnAltClick", editor = "func", params = "self, selection", default = function(self, selection) end, },
		{ category = "General", id = "OnDoubleClick", editor = "func", params = "self, selection", default = function(self, selection) end, },
		{ category = "General", id = "MultipleSelection", editor = "bool", default = false },
		{ category = "General", id = "DragAndDrop", editor = "bool", default = false },
		{ category = "General", id = "EnableRollover", editor = "bool", default = false },
		
		{ category = "General", id = "EmptyText", editor = "text", default = "" },
		
		-- Enables the actions for all nodes of a tree panel. By default actions are disabled for Group nodes but some tree panels don't have groups and can use this option.
		{ category = "Common Actions", id = "EnableForRootLevelItems", editor = "bool", default = false, },
		{ category = "Common Actions", id = "ItemClass", editor = "expression", params = "gedapp", default = function(gedapp) return "" end, },
		
		{ category = "Context Menu", id = "RootActionContext", editor = "text", default = "" },
		{ category = "Context Menu", id = "ChildActionContext", editor = "text", default = "" },

		{ category = "Layout", id = "FullWidthText", editor = "bool", default = false, },
		{ category = "Layout", id = "ShowToolbarButtons", name = "Show toolbar buttons", editor = "bool", default = true, help = "Show/hide the buttons in the TreePanel toolbar (expand/collapse tree, etc)", },
	},
	ContainerControlClass = "XTree",
	HorizontalScroll = true,
	EnableSearch = true,
	Interactive = true,
	Translate = true,
	
	expanding_node = false,
	currently_selected_path = false,
	pending_update = false,
	pending_selection = false,
	alt_format_enabled = false,
	filtered_tree = false,
	view_warnings_only = false,
	view_errors_only = false,
}

function GedTreePanel:InitControls()
	GedPanel.InitControls(self)
	
	local tree = self.idContainer
	tree:SetSortChildNodes(false)
	tree.GetNodeChildren = function(tree, ...) return self:GetNodeChildren(...) end
	tree.InitNodeControls = function(tree, ...) self:InitNodeControls(...) end
	tree.OnSelection = function(tree, selection, selected_indexes) self:OnSelection(selection, selected_indexes) end
	tree.OnCtrlClick = function(tree, ...) self:OnCtrlClick(...) end
	tree.OnAltClick = function(tree, ...) self:OnAltClick(...) end
	tree.OnUserExpandedNode = function(tree, path) self:OnUserExpandedNode(path) end
	tree.OnUserCollapsedNode = function(tree, path) self:OnUserCollapsedNode(path) end
	tree.OnDoubleClickedItem = function(tree, path) self:OnDoubleClick(path) end
	
	tree:SetActionContext(self.ActionContext)
	tree:SetRootActionContext(self.RootActionContext)
	tree:SetChildActionContext(self.ChildActionContext)
	tree:SetMultipleSelection(true)
	tree:SetFullWidthText(self.FullWidthText)
	GedPanel.SetSearchActionContexts(self, self.SearchActionContexts)
	
	local alt_format_button = XTemplateSpawn("GedToolbarToggleButtonSmall", self.idTitleContainer)
	alt_format_button:SetId("idAltFormatButton")
	alt_format_button:SetIcon("CommonAssets/UI/Ged/log-focused.tga")
	alt_format_button:SetRolloverText(T(185486815318, "Hide/show alternative names"))
	alt_format_button:SetBackground(self.idTitleContainer:GetBackground())
	alt_format_button:SetToggled(false)
	alt_format_button:SetFoldWhenHidden(true)
	alt_format_button:SetVisible(self.AltFormat and self.AltFormat ~= "")
	alt_format_button.OnPress = function(button)
		self.alt_format_enabled = not button:GetToggled()
		button:SetToggled(self.alt_format_enabled)
		self:BindView("tree", self.FormatFunc, self.alt_format_enabled and self.AltFormat or self.Format, self.AllowObjectsOnly)
	end

	if self.ShowToolbarButtons then
		local button = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
		button:SetIcon("CommonAssets/UI/Ged/collapse_node.tga")
		button:SetRolloverText("Expand/collapse selected node's children (Alt-C)")
		button:SetBackground(self.idTitleContainer:GetBackground())
		button.OnPress = function()
			self.idContainer:ExpandNodeByPath(self.idContainer:GetFocusedNodePath() or empty_table)
			self.idContainer:ExpandCollapseChildren(self.idContainer:GetFocusedNodePath() or empty_table, not "recursive", "user_initiated")
		end
		
		local button = XTemplateSpawn("GedToolbarButtonSmall", self.idTitleContainer)
		button:SetIcon("CommonAssets/UI/Ged/collapse_tree.tga")
		button:SetRolloverText("Expand/collapse tree (Shift-C)")
		button:SetBackground(self.idTitleContainer:GetBackground())
		button.OnPress = function() self.idContainer:ExpandCollapseChildren({}, "recursive", "user_initiated") end
	end
end

function GedTreePanel:Done()
	for bind in string.gmatch(self.SelectionBind .. ",", reCommaList) do
		self.connection:UnbindObj(bind)
	end
end

function GedTreePanel:BindViews()
	if self.FilterName ~= "" and self.FilterClass then
		self.connection:BindFilterObj(self.context .. "|tree", self.FilterName, self.FilterClass)
	end
	self:BindView("tree", self.FormatFunc, self.alt_format_enabled and self.AltFormat or self.Format, self.AllowObjectsOnly, self.EnableRollover)
	if not terminal.desktop:GetKeyboardFocus() then
		self:SetPanelFocused()
	end
end

local function try_index(root, key, ...)
	if key and root then
		return try_index(root[key], ...)
	end
	return root
end

function GedTreePanel:GetNodeChildren(...)
	if not self.filtered_tree then return end

	local texts, is_leaf, auto_expand, rollovers, user_datas = {}, {}, {}, {}, {}
	local node_data = try_index(self.filtered_tree, ...)
	local warning_idxs = self.filtered_tree == node_data and get_warning_nodes(self) or empty_table
	if type(node_data) == "table" then
		for i, subnode in ipairs(node_data) do
			if subnode then
				local read_only_wrapped_text = string.format("<read_only('%s')><literal(text,true)></read_only('%s')>", self.context, self.context)
				local format = subnode.id and ("<ged_marks('%s')>" .. read_only_wrapped_text) or read_only_wrapped_text
				if table.find(warning_idxs, i) then
					format = string.format("<underline>%s</underline>", format)
				end
				
				local str = subnode.id and string.format(format, subnode.id) or format
				texts[i] = T{str, text = subnode.name, untranslated = true}
				is_leaf[i] = #subnode == 0
				auto_expand[i] = not subnode.collapsed
				rollovers[i] = subnode.rollover
				user_datas[i] = subnode
			end
		end
	end
	return texts, is_leaf, auto_expand, rollovers, user_datas
end

GedTreePanel.OnShortcut = GedPanel.OnShortcut

local function new_item(self, child, class, path, button)
	local method = child and "GedGetSubItemClassList" or "GedGetSiblingClassList"
	local items = self.app:Call(method, self.context, path, self.app.ScriptDomain)
	local title = string.format("New %s", class)
	GedOpenCreateItemPopup(self, title, items, button, function(class)
		if self.window_state == "destroying" then return end
		self.app:Op("GedOpTreeNewItem", self.context, path, class, child and "child")
	end)
end

function GedTreePanel:InitNodeControls(node, data)
	if self.DragAndDrop then
		local label = node.idLabel
		if label then
			local l, u, r, b = label:GetPadding():xyxy()
			node.idDragAndDrop = GedTreeDragAndDrop:new({
				Dock = "box",
				Margins = box(-l, -u, -r, -b),
				NodeParent = node,
			}, label)
		end
	end

	local mode = data and data.child_button_mode
	if not mode then return end
	
	if data.child_class and (mode == "docked" or mode == "docked_if_empty" and #self.idContainer:GetChildNodes(node) == 0) then
		local button = XTemplateSpawn("GedPropertyButton", node)
		button:SetText("Add new...")
		button:SetDock(IsKindOf(node, "XTreeNode") and "bottom")
		button:SetZOrder(IsKindOf(node, "XTreeNode") and 0 or 1)
		button:SetMargins(IsKindOf(node, "XTreeNode") and box(40, 2, 0, 2) or box(20, 2, 0, 2))
		button:SetHAlign("left")
		button.OnPress = function() CreateRealTimeThread(new_item, self, "child", data.child_name or data.child_class, node.path, button) end
		Msg("XWindowRecreated", button)
		return
	end
	
	-- create floating button that appears on rollover at the right side of items
	if node == self.idContainer then return end
	if (mode == "floating" or mode == "children") and not data.child_class then return end
	if mode == "floating_combined" and not (data.child_class or data.sibling_class) then return end
	
	local new_parent = XWindow:new({ HandleMouse = true, HAlign = "left" }, node)
	node.idLabel:SetParent(new_parent)
	
	local create_button = XTemplateSpawn("GedToolbarButtonSmall", new_parent)
	create_button:SetId("idNew")
	create_button:SetDock("right")
	create_button:SetIcon("CommonAssets/UI/Ged/new.tga")
	create_button:SetVisible(not mode:starts_with("floating"))
	create_button:SetRolloverText("New " .. (data.child_name or data.child_class))
	create_button.OnPress = function(button)
		if not self:IsThreadRunning("CreateSubItem") then
			self:CreateThread("CreateSubItem", function(self, data)
				local mode = data.child_button_mode
				if mode == "floating_combined" and data.child_class and data.sibling_class then
					local host = XActionsHost:new({}, self)
					XAction:new({
						ActionId = "AddChild",
						ActionMenubar = "menu",
						ActionTranslate = false,
						ActionName = "Add child item...",
						OnAction = function() CreateRealTimeThread(new_item, self, "child", data.child_name or data.child_class, node.path, button) end,
					}, host)
					XAction:new({
						ActionId = "AddSibling",
						ActionMenubar = "menu",
						ActionTranslate = false,
						ActionName = "Add new item below...",
						OnAction = function() CreateRealTimeThread(new_item, self, not "child", data.sibling_name or data.sibling_class, node.path, button) end,
					}, host)
					host:OpenPopupMenu("menu", terminal.GetMousePos())
				elseif (mode == "floating_combined" or mode == "floating" or mode == "children") and data.child_class then
					new_item(self, "child", data.child_name or data.child_class, node.path, button)
				elseif mode == "floating_combined" and data.sibling_class then
					new_item(self, not "child", data.sibling_name or data.sibling_class, node.path, button)
				end
			end, self, data)
		end
	end
	create_button.button_mode = mode
	
	-- A thread to make the hovered button visible; OnSetRollover doesn't work as multiple nested items get rollovered at once
	if not self:IsThreadRunning("TreeItemRollover") then
		self:CreateThread("TreeItemRollover", function(self)
			local last
			while true do
				local focus = terminal.desktop.keyboard_focus
				if not focus or not GetParentOfKind(focus, "XPopup") then
					local pt = terminal.GetMousePos()
					local rollover = GetParentOfKind(terminal.desktop.modal_window:GetMouseTarget(pt), "XTreeNode")
					if rollover ~= last then
						if last and last.idNew and last.idNew.button_mode:starts_with("floating") then last.idNew:SetVisible(false) end
						last = rollover
						if last and last.idNew and last.idNew.button_mode:starts_with("floating") then last.idNew:SetVisible(true) end
					end
				end
				Sleep(50)
			end
		end, self)
	end	
end

function GedTreePanel:OnUserExpandedNode(path)
	self.connection:Send("rfnTreePanelNodeCollapsed", self.context, path, false)
	local entry = try_index(self.filtered_tree, table.unpack(path))
	if entry then entry.collapsed = false end
	local orig_entry = try_index(self:Obj(self.context.."|tree"), table.unpack(path))
	if orig_entry then orig_entry.collapsed = false end
end

function GedTreePanel:OnUserCollapsedNode(path)
	self.connection:Send("rfnTreePanelNodeCollapsed", self.context, path, true)
	local entry = try_index(self.filtered_tree, table.unpack(path))
	if entry then entry.collapsed = true end
	local orig_entry = try_index(self:Obj(self.context.."|tree"), table.unpack(path))
	if orig_entry then orig_entry.collapsed = true end
end

function GedTreePanel:GetSelection()
	return self.idContainer:GetSelection()
end

function GedTreePanel:GetMultiSelection()
	return table.pack(self:GetSelection())
end

function GedTreePanel:SetSelection(selection, selected_keys, notify, restoring_state)
	if type(selection) == "table" and type(selection[1]) == "table" then
		selected_keys = selection[2]
		selection = selection[1]
	end
	if restoring_state or self.pending_update then
		self.pending_selection = { selection, selected_keys }
		self.restoring_state = restoring_state
		return
	end
	self.idContainer:SetSelection(selection, selected_keys, notify)
end

function GedTreePanel:BindSelectedObject(selection, selected_keys)
	if not selection then return end
	self.app:StoreAppState()
	for bind in string.gmatch(self.SelectionBind .. ",", reCommaList) do
		if self.MultipleSelection and selected_keys and #selected_keys > 1 then
			self.app:SelectAndBindMultiObj(bind, { self.context, unpack_params(selection, 1, #selection - 1) }, selected_keys)
		else
			self.app:SelectAndBindObj(bind, { self.context, table.unpack(selection) })
		end
	end
end

function GedTreePanel:OnSelection(selection, selected_keys)
	self:BindSelectedObject(selection, selected_keys)
	local old_selection = self.currently_selected_path or empty_table
	if not table.iequal(old_selection, selection) then
		self:OnSelectionChanged(selection)
		self.currently_selected_path = selection
		self.app:ActionsUpdated()
	end
end

function GedTreePanel:SetSelectionAndFocus(path)
	local tree = self.idContainer
	if not tree then return end -- window destroying
	if table.iequal(tree:GetSelection() or empty_table, path) then
		self.app:TryHighlightSearchMatchInChildPanels(self)
	else
		-- focusing prevents issues with the focus restored to the leftmost panel (and selecting the wrong object) when cycling through search results
		local focus = self.desktop:GetKeyboardFocus()
		if not focus or focus.Id ~= "idSearchEdit" then
			self:SetFocus()
		end
		tree:SetSelection(path)
	end
end

function GedTreePanel:TryHighlightSearchMatch()
	local match_data = self.app:GetDisplayedSearchResultData()
	if match_data then
		local match_path = match_data.path
		local max_idx, path = 0
		self.idContainer:ForEachNode(function(node)
			local text = TDevModeGetEnglishText(node:GetText())
			for idx, obj_id in ipairs(match_path) do
				if string.find(text, obj_id, 1, true) then
					max_idx = Max(max_idx, idx)
					path = node.path
				end
			end
		end)
		
		if max_idx > 0 then
			self:SetSelectionAndFocus(path)
		end
	end
end

function GedTreePanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	if view == nil then
		self.idContainer:ClearSelection(false)
		self.pending_update = true
	end
	if view == "tree" then
		self:RebuildTree()
		local tree_empty = self:IsEmpty()
		if context == "bookmarks" then
			if tree_empty then
				self:Expand(false) -- collapse bookmarks panel when empty
			elseif not self.expanded then
				self:Expand(true) -- expand when adding a bookmark and panel is collapsed
			end
		end
		local first_update = self.app.first_update
		local sel = self.pending_selection or                         -- selection set before the tree data arrived
		   first_update and (tree_empty and {{}, {}} or {{1},{1}}) or -- default selection upon first editor open
		   table.pack(self.idContainer:GetSelection())                -- previous selection
		local scroll_pos = self.idScroll.Scroll
		self.idContainer:Clear() -- fills the tree control with content
		if tree_empty and self.context ~= "bookmarks" then
			self:OnSelection(empty_table) -- will bind "nothing" to child panels to empty them
			local text = XText:new({ ZOrder = 1, Margins = box(20, 2, 0, 2) }, self.idContainer)
			text:SetText(self.EmptyText)
			Msg("XWindowRecreated", text)
		else
			self.idContainer:SetSelection(sel[1], sel[2], first_update or self.pending_update and not self.restoring_state)
		end
		self.idScroll:ScrollTo(scroll_pos)
		self.pending_update = false
		self.pending_selection = false
		self.app.first_update = false
		self.restoring_state = false
		self:InitNodeControls(self.idContainer, self.filtered_tree)
		Msg("XWindowRecreated", self)
		
		if self.search_values then
			self:StartUpdateFilterThread("not_user_initiated")
		end
		self:TryHighlightSearchMatch()
	end
end

function GedTreePanel:SetViewWarningsOnly(mode)
	if self.view_warnings_only ~= mode then
		self.view_warnings_only = mode
		if self.idSearchEdit:GetText() ~= "" then
			self:CancelSearch()
		else
			self:UpdateFilter()
		end
	end
end

function GedTreePanel:SetViewErrorsOnly(mode)
	if self.view_errors_only ~= mode then
		self.view_errors_only = mode
		if self.idSearchEdit:GetText() ~= "" then
			self:CancelSearch()
		else
			self:UpdateFilter()
		end
	end
end

-- If it returns true - hide the item
function GedTreePanel:FilterItem(text, item_id, filter_text, has_child_nodes)
	local msg = get_warning_msg(item_id)
	local msg_type = msg and msg[#msg]
	
	local filter = GedPanel.FilterItem(self, text, item_id, filter_text)
	local children = not has_child_nodes
	
	-- Show only warnings/errors - 4 states
	if self.view_warnings_only and not self.view_errors_only then
		return filter or children and msg_type ~= "warning" -- only warnings
	elseif not self.view_warnings_only and self.view_errors_only then
		return filter or children and msg_type ~= "error" -- only errors
	elseif self.view_warnings_only and self.view_errors_only then
		return filter or children and not msg_type -- warning or error
	else
		return filter -- everything
	end
end

function GedTreePanel:BuildTree(root, filter_text)
	if not root or root.filtered then
		return false
	end
	local has_child_nodes = type(root) ~= "string" and #root > 0
	if (self.search_value_results or type(root) == "string") and self:FilterItem(root, root.id, filter_text, has_child_nodes) then
		return false
	end
	if type(root) == "string" then
		return { id = root.id, name = root }
	end
	
	local node = {
		id = root.id,
		name = root.name,
		class = root.class,
		child_button_mode = root.child_button_mode,
		child_class = root.child_class,
		child_name = root.child_name,
		sibling_class = root.sibling_class,
		sibling_name = root.sibling_name,
		rollover = root.rollover,
		collapsed = filter_text == "" and not self.view_warnings_only and not self.view_errors_only and root.collapsed
	}
	
	local visible = false
	for key, subnode in ipairs(root) do
		local child = self:BuildTree(subnode, filter_text) or false
		table.insert(node, child)
		if child then visible = true end
	end
	if visible or root.name and (self.search_value_results or not self:FilterItem(root.name, root.id, filter_text)) then
		return node
	end
end

function GedTreePanel:RebuildTree()
	local data = self:Obj(self.context .. "|tree")
	if not data then return end
	self.filtered_tree = self:BuildTree(data, self:GetFilterText()) or empty_table
end

function GedTreePanel:FocusFirstEntry()
	if self:GetFilterText() == "" then
		if not self:GetSelection() then
			self:SetSelection({1})
		end
		self:SetPanelFocused()
		return
	end
	
	local path = {}
	local root = self.filtered_tree
	while type(root) == "table" do
		local to_iterate = root
		root = nil
		for key, node in ipairs(to_iterate) do
			if node then
				root = node
				table.insert(path, key)
				break
			end
		end
	end
	self:SetSelection(path)
	self:SetPanelFocused()
end

function GedTreePanel:UpdateFilter()
	self:RebuildTree()
	local sel = table.pack(self.idContainer:GetSelection())
	local scroll_pos = self.idScroll.Scroll
	self.idContainer:Clear() -- fills the tree control with content
	self.idContainer:SetSelection(sel[1], sel[2], not "notify") -- restore selection as if nothing has changed (don't notify)
	self.idScroll:ScrollTo(scroll_pos)
	self:InitNodeControls(self.idContainer, self.filtered_tree)
	Msg("XWindowRecreated", self)
end

function GedTreePanel:UpdateItemTexts()
	self:UpdateTitle(self.context)
	self.idContainer:ForEachNode(function(node) node.idLabel:SetText(node.idLabel:GetText()) end)
end

function GedTreePanel:IsEmpty()
	return type(self.filtered_tree) ~= "table"
end

if FirstLoad then
	ged_drag_target = false
	ged_drag_initatior = false
	ged_drop_target = false
	ged_drop_type = false
end
DefineClass.GedDragAndDrop = {
	__parents = { "XDragAndDropControl", },
	ForEachSelectedDragTargetChild = empty_func,
	ForEachDragTargetChild = empty_func,
	GetGedDragTarget = empty_func,
	drop_target_container_class = "XTree",
	line_thickness = 2,
}

function GedDragAndDrop:GetDragAndDropError()
	if not ged_drag_target or not ged_drop_target then
		return true
	end
	local selected_children = {}
	self:ForEachSelectedDragTargetChild(function(selected_child, selected_children)
		selected_children[selected_child] = true
	end, selected_children)
	if not next(selected_children) then
		return true
	end
	local win = ged_drop_target
	while win and not IsKindOf(win, self.drop_target_container_class) do
		if selected_children[win] then
			return true
		end
		win = win.parent
	end
end

function GedDragAndDrop:OnMouseButtonDown(pt, button)
	if button ~= "L" then return end
	local res = XDragAndDropControl.OnMouseButtonDown(self, pt, button)
	if not self.drag_win and self.pt_pressed then
		self:SetModal()
	end
	return res
end

function GedDragAndDrop:OnMouseButtonUp(pt, button)
	if self.desktop.modal_window == self then
		self:SetModal(false)
	end
	return XDragAndDropControl.OnMouseButtonUp(self, pt, button)
end

function GedDragAndDrop:GetMouseCursor()
	if not self.enabled then return end
	if self.drag_win then
		if self:GetDragAndDropError() then
			return "CommonAssets/UI/ErrorCursor.tga"
		else
			return "CommonAssets/UI/HandCursor.tga"
		end
	end
end

function GedDragAndDrop:OnDragStart(pt, button)
	local drag_target = self:GetGedDragTarget()
	if not drag_target then return end
	ged_drag_target = drag_target
	ged_drag_initatior = self

	local drag_parent_win = XWindow:new({
		LayoutMethod = "VList",
		ZOrder = 10,
		Clip = false,
		HideOnEmpty = true,
		UseClipBox = false,
	}, self.desktop)

	self:ForEachSelectedDragTargetChild(function(child, drag_parent_win, self)
		return self:AddDragWindowText(child, drag_parent_win)
	end, drag_parent_win, self)
	
	if #drag_parent_win == 0 then
		drag_parent_win:delete()
		return
	end

	drag_parent_win:UpdateMeasure(drag_parent_win.MaxWidth, drag_parent_win.MaxHeight)
	local cursor_width = UIL.MeasureImage(GetMouseCursor())
	drag_parent_win:SetBox(pt:x() + cursor_width - 10, pt:y(), drag_parent_win.measure_width, drag_parent_win.measure_height, true)

	return drag_parent_win
end

function GedDragAndDrop:GetDragWindowTextControl(control)
	return control.idLabel
end

function GedDragAndDrop:AddDragWindowText(control, drag_parent_win)
	local label_win = self:GetDragWindowTextControl(control)
	if not label_win then return end
	XText:new({
		HAlign = "left",
		VAlign = "top",
		ZOrder = 10,
		Clip = false,
		TextStyle = GetDarkModeSetting() and "GedDefaultDarkMode" or "GedDefault",
		Translate = label_win.Translate,
		HideOnEmpty = true,
		UseClipBox = false,
		Background = RGBA(89, 126, 141, 100),
	}, drag_parent_win):SetText(label_win:GetText())
end

function GedDragAndDrop:UpdateDrag(drag_win, pt)
	XDragAndDropControl.UpdateDrag(self, drag_win, pt)
	if not ged_drag_target or ged_drag_target ~= self:GetGedDragTarget() then return end
	local drop_target = false
	if ged_drag_target.box:minx() < pt:x() and ged_drag_target.box:maxx() > pt:x() then
		self:ForEachDragTargetChild(function(child, self, py)
			local drop_target_box = self:GetDropTargetBox(child)
			if drop_target_box and drop_target_box:miny() <= py and drop_target_box:maxy() > py then
				drop_target = child
				return "break"
			end
		end, self, pt:y())
	end
	if drop_target ~= ged_drop_target then
		ged_drop_target = drop_target
		UIL.Invalidate()
	end
	if ged_drop_target then
		local drop_target_box = self:GetDropTargetBox()
		if not drop_target_box then return end
		local miny, maxy = drop_target_box:miny(), drop_target_box:maxy()
		local sizey = maxy - miny
		local dy = pt:y() - miny
		local pct = dy * 100 / sizey
		local new_drop_type = self:GetDropType(pct)
		if new_drop_type ~= ged_drop_type then
			ged_drop_type = new_drop_type
			UIL.Invalidate()
		end
	end
end

function GedDragAndDrop:GetDropTargetBox(drop_target)
	drop_target = drop_target or ged_drop_target
	return drop_target and drop_target.box
end

function GedDragAndDrop:GetDropType(pct)
	return pct < 50 and "Up" or "Down"
end

local function DrawHorizontalLine(width, pt1, pt2, color)
	local x1, y1 = pt1:xy()
	local x2, y2 = pt2:xy()
	for i = -width/2, width - width/2 - 1 do
		UIL.DrawLine(point(x1, y1 + i), point(x2, y2 + i), color)
	end
end

local highlight_color = RGB(62, 165, 165)
local highlight_color_error = RGB(197, 128, 128)
function GedDragAndDropHighlight()
	if not ged_drag_initatior or not ged_drop_target then return end
	local color = ged_drag_initatior:GetDragAndDropError() and highlight_color_error or highlight_color
	local drop_target_box = ged_drag_initatior:GetDropTargetBox()
	local x_padding = ged_drag_initatior.line_thickness/2
	if ged_drop_type == "Up" then
		DrawHorizontalLine(ged_drag_initatior.line_thickness, point(drop_target_box:minx() - x_padding, drop_target_box:miny() + 1), point(drop_target_box:maxx() + x_padding, drop_target_box:miny() + 1), color)
	elseif ged_drop_type == "Down" then
		DrawHorizontalLine(ged_drag_initatior.line_thickness, point(drop_target_box:minx() - x_padding, drop_target_box:maxy() + 1), point(drop_target_box:maxx() + x_padding, drop_target_box:maxy() + 1), color)
	else
		UIL.DrawBorderRect(box(drop_target_box:minx() - x_padding, drop_target_box:miny() - 1 + ged_drag_initatior.line_thickness%2, drop_target_box:maxx() + x_padding, drop_target_box:maxy() + 1), ged_drag_initatior.line_thickness, ged_drag_initatior.line_thickness, color, RGBA(0, 0, 0, 0))
	end
end

function OnMsg.Start()
	if Platform.desktop then
		UIL.Register("GedDragAndDropHighlight", XDesktop.terminal_target_priority + 1)
	end
end

function GedDragAndDrop:OnDragEnded(drag_win, last_target, drag_res)
	drag_win:delete()
	ged_drag_target = false
	ged_drag_initatior = false
	ged_drop_target = false
	ged_drop_type = false
	UIL.Invalidate()
end

function GedDragAndDrop:GetDropTarget(...)
	if ged_drop_target then
		return ged_drop_target.idDragAndDrop
	end
	return XDragAndDropControl.GetDropTarget(self, ...)
end

DefineClass.GedTreeDragAndDrop = {
	__parents = { "GedDragAndDrop", },
	NodeParent = false,
}

function GedTreeDragAndDrop:ForEachSelectedDragTargetChild(func, ...)
	local panel = GetParentOfKind(ged_drag_target, "GedTreePanel")
	if not panel then return end
	local first_selected, selected_idxs = panel:GetSelection()
	if not first_selected then return end
	local parent = ged_drag_target:NodeByPath(first_selected, #first_selected - 1, "allow_root")
	local children = ged_drag_target:GetChildNodes(parent)
	for _, idx in ipairs(selected_idxs) do
		local selected_child = children[idx]
		if func(selected_child, ...) == "break" then
			return "break"
		end
	end
end

function GedTreeDragAndDrop:GetGedDragTarget()
	return self.NodeParent.tree
end

function GedTreeDragAndDrop:ForEachDragTargetChild(func, ...)
	if not IsKindOf(ged_drag_target, self.drop_target_container_class) then return end
	return ged_drag_target:ForEachNode(func, ...)
end

function GedTreeDragAndDrop:GetDropTargetBox(drop_target)
	drop_target = drop_target or ged_drop_target
	return drop_target and drop_target.idLabel and drop_target.idLabel.box
end

function GedTreeDragAndDrop:GetDropType(pct)
	if pct < 20 then
		return "Up"
	elseif pct > 80 and (not ged_drop_target or #ged_drop_target.idSubtree == 0) then
		return "Down"
	else
		return "In"
	end
end

gedTreeDragAndDropOps = {
	Up   = "GedOpTreeDropItemUp",
	Down = "GedOpTreeDropItemDown",
	In   = "GedOpTreeDropItemInwards",
}
function GedTreeDragAndDrop:OnDrop(drag_win, pt, drag_source_win)
	if self:GetDragAndDropError() then return end
	local panel = GetParentOfKind(ged_drop_target, "GedTreePanel")
	local op = gedTreeDragAndDropOps[ged_drop_type]
	panel.app:Op(op, panel.context, panel:GetMultiSelection(), table.copy(ged_drop_target.path))
end

DefineClass.GedListDragAndDrop = {
	__parents = { "GedDragAndDrop", },
	drop_target_container_class = "XList",
	List = false,
	Item = false,
}

function GedListDragAndDrop:ForEachSelectedDragTargetChild(func, ...)
	local list = GetParentOfKind(ged_drag_target, "GedListPanel")
	if not list then return end
	local selection = ged_drag_target:GetSelection()
	for _, idx in ipairs(selection) do
		local selected_child = ged_drag_target[idx]
		if func(selected_child, ...) == "break" then
			return "break"
		end
	end
end

function GedListDragAndDrop:GetGedDragTarget()
	return self.List.idContainer
end

function GedListDragAndDrop:ForEachDragTargetChild(func, ...)
	if not IsKindOf(ged_drag_target, self.drop_target_container_class) then return end
	for _, child in ipairs(ged_drag_target) do
		if func(child, ...) == "break" then
			return "break"
		end
	end
end

gedListDragAndDropOps = {
	Up   = "GedOpListDropUp",
	Down = "GedOpListDropDown",
}
function GedListDragAndDrop:OnDrop(drag_win, pt, drag_source_win)
	if self:GetDragAndDropError() then return end
	local panel = GetParentOfKind(ged_drop_target, "GedListPanel")
	local op = gedListDragAndDropOps[ged_drop_type]
	panel.app:Op(op, panel.context, panel:GetMultiSelection(), table.find(panel.idContainer, ged_drop_target))
end

----- GedBreadcrumbPanel

DefineClass.GedBreadcrumbPanel = {
	__parents = { "GedPanel" },
	properties = {
		{ category = "General", id = "FormatFunc", editor = "text", default = "GedFormatObject", },
		{ category = "General", id = "TreePanelId", editor = "text", default = "", },
	},
	ContainerControlClass = "XWindow",
	MaxWidth = 1000000,
}

function GedBreadcrumbPanel:InitControls()
	GedPanel.InitControls(self)
	self.idContainer.LayoutMethod = "HWrap"
end

function GedBreadcrumbPanel:BindViews()
	self:BindView("path", self.FormatFunc)
end

function GedBreadcrumbPanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	if view == "path" then
		local pathdata = self:Obj(self.context .. "|path")
		self.idContainer:DeleteChildren()
		for k, entry in ipairs(pathdata) do
			local button = XButton:new({
				OnPress = function(button)
					self.app[self.TreePanelId]:SetSelection(entry.path)
				end,
				Background = RGBA(0, 0, 0, 0),
				RolloverBackground = RGBA(72, 72, 72, 255),
			}, self.idContainer)
			XText:new({}, button):SetText(entry.text)
			if k < #pathdata then
				XText:new({}, self.idContainer):SetText("<color 32 128 32> >> </color>")
			end
		end
		for _, win in ipairs(self.idContainer) do
			win:Open()
		end
		Msg("XWindowRecreated", self)
	end
end


----- GedTextPanel

DefineClass.GedTextPanel = {
	__parents = { "GedPanel", "XFontControl" },
	properties = {
		{ category = "General", id = "FormatFunc", editor = "text", default = "GedFormatObject", },
		{ category = "General", id = "Format", editor = "text", default = "", },
		{ category = "General", id = "AutoHide", editor = "bool", default = true, },
	},
	ContainerControlClass = "XText",
	MaxWidth = 1000000,
	TextStyle = "GedTextPanel",
}

LinkFontPropertiesToChild(GedTextPanel, "idContainer")

function GedTextPanel:InitControls()
	GedPanel.InitControls(self)

	local text = self.idContainer
	text:SetEnabled(false)
	text:SetBorderWidth(0)
	text:SetFontProps(self)
	text:SetWordWrap(false)
end

function GedTextPanel:GetView()
	return self.FormatFunc .. "." .. self.Format -- generate unique view id, to make sure different GedTextPanels won't clash
end

function GedTextPanel:BindViews()
	self:BindView(self:GetView(), self.FormatFunc, self.Format)
end

function GedTextPanel:GetTextToDisplay()
	return self:Obj(self.context .. "|" .. self:GetView()) or ""
end

function GedTextPanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	
	if self.window_state == "open" then
		local text = self:GetTextToDisplay()
		self.idContainer:SetText(text)
		self:SetVisible(not self.AutoHide or text ~= "")
	end
end

DefineClass.GedMultiLinePanel = {
	__parents = { "GedTextPanel" },
	ContainerControlClass = "XMultiLineEdit",
	TextStyle = "GedMultiLine",
}

function GedMultiLinePanel:InitControls()
	GedTextPanel.InitControls(self)
	self.idContainer:SetPlugins({ "XCodeEditorPlugin" })
end


----- GedObjectPanel

DefineClass.GedObjectPanel = {
	__parents = { "GedPanel" },
	properties = {
		{ category = "General", id = "FormatFunc", editor = "text", default = "GedInspectorFormatObject", },
	},
	ContainerControlClass = "XScrollArea",
	MaxWidth = 1000000,
	HorizontalScroll = true,
	Interactive = true,
}

function GedObjectPanel:BindViews()
	self:BindView("objectview", self.FormatFunc)
end

function GedObjectPanel:OnContextUpdate(context, view)
	GedPanel.OnContextUpdate(self, context, view)
	if view == "objectview" then
		self.idContainer:DeleteChildren()
		
		local objectview = self:Obj(self.context .. "|objectview")
		if not objectview then return end
		
		local metatable_id = objectview.metatable_id
		local text = objectview.name .. (objectview.metatable_id and (" [ <color 128 128 216> <h OpenKey 1>" .. objectview.metatable_name .. "</h></color> ]") or "")
		local child = XText:new({
			TextStyle = self.app.dark_mode and "GedTitleDarkMode" or "GedTitle",
		}, self.idContainer)
		child:SetText(text)
		child.OnHyperLink = function(this, id, ...)
			if id == "OpenKey" then
				self.app:Op("GedOpBindObjByRefId", "root", objectview.metatable_id, terminal.IsKeyPressed(const.vkControl)) 
			end
		end
		
		local search_text = self.idSearchEdit:GetText()
		for _, v in ipairs(objectview.members) do
			local key = v.key
			local val = v.value
			local count = v.count
			local value_id = v.value_id
			local key_id = v.key_id
			
			local text = (key_id and "<color 128 128 216><h OpenKey q>" .. key .. "</h></color>" or key) .. " = " .. (value_id and "<color 128 128 216><h OpenValue 2>" .. val .. "</h></color>"  or val) .. (count and "<color 100 200 220> (#" .. count .. ")</color>" or "")
			local child = XText:new({
				TextStyle = self.app.dark_mode and "GedDefaultDarkMode" or "GedDefault",
			}, self.idContainer)
			child:SetText(text)
			child.OnHyperLink = function(this, id, ...)
				if id == "OpenKey" then
					self.app:Op("GedOpBindObjByRefId", "root", key_id, terminal.IsKeyPressed(const.vkControl)) 
				elseif id == "OpenValue" then
					self.app:Op("GedOpBindObjByRefId", "root", value_id, terminal.IsKeyPressed(const.vkControl))
				end	
			end
			
			self:UpdateChildVisible(child, search_text)
		end
		self.idContainer:ScrollTo(0, 0)
	end	
end

function GedObjectPanel:UpdateChildVisible(child, search_text)
	if search_text ~= "" and not string.find_lower(string.strip_tags(child.Text), search_text) then 
		child:SetDock("ignore")
		child:SetVisible(false)
	else
		child:SetDock(false)
		child:SetVisible(true)
	end
end

-- Called when there's a change in the search bar
function GedObjectPanel:UpdateFilter()
	local search_text = self.idSearchEdit:GetText()
	for _, container in ipairs(self) do
		if container.Id == "idContainer" then
			for idx, child in ipairs(container) do
				if idx ~= 1 then
					self:UpdateChildVisible(child, search_text) -- hide the items that don't contain the search string and show the rest
				end
			end
		end
	end
end


----- GedGraphEditorPanel

DefineClass.GedGraphEditorPanel = {
	__parents = { "GedPanel" },
	properties = {
		{ category = "General", id = "SelectionBind", editor = "text", default = "", },
	},
	
	ContainerControlClass = "XGraphEditor",
}

function GedGraphEditorPanel:InitControls()
	GedPanel.InitControls(self)
	
	local graph = self.idContainer
	graph:SetReadOnly(true)
	graph.OnGraphEdited = function()
		self:Op("GedSetGraphData", "SelectedPreset", self.idContainer:GetGraphData())
	end
	graph.OnNodeSelected = function(graph, node)
		for bind_name in string.gmatch(self.SelectionBind .. ",", reCommaList) do
			self:Send("GedBindGraphNode", "SelectedPreset", node.handle, bind_name)
		end
	end
	graph.NodeClassItems = g_GedApp.ContainerGraphItems
end

function GedGraphEditorPanel:BindViews()
	if not self.context then return end
	self:BindView("graph", "GedGetGraphData")
end

function GedGraphEditorPanel:OnContextUpdate(context, view)
	if view == "graph" then
		local data = self:Obj(context .. "|graph") -- will be nil if a non-preset is selected
		self.idContainer:SetGraphData(data)
		self.idContainer:SetReadOnly(not data)
	end
	GedPanelBase.OnContextUpdate(self, context, view)
end


----- XPanelSizer

DefineClass.XPanelSizer = 
{
	__parents = { "XControl" },
	
	properties = {
		{ category = "Visual", id = "Cursor", editor = "ui_image", force_extension = ".tga", default = "CommonAssets/UI/Controls/resize03.tga" },
		{ category = "Visual", id = "BorderSize", editor = "number", default = 3, },
	},
	is_horizontal = true,
	drag_start_mouse_pos = false, 
	drag_start_panel1_max_sizes = false,
	drag_start_panel2_max_sizes = false,
	
	panel1 = false, 
	panel2 = false,
	valid = true,
}

function XPanelSizer:Open(...)
	local layout_method = self.parent.LayoutMethod
	assert(layout_method == "HPanel" or layout_method == "VPanel")
	self.is_horizontal = layout_method == "HPanel"

	if self.is_horizontal then
		self:SetMaxWidth(self.BorderSize)
		self:SetMinWidth(self.BorderSize)
	else
		self:SetMaxHeight(self.BorderSize)
		self:SetMinHeight(self.BorderSize)
	end
	
	if not self.panel1 or not self.panel2 then
		local current_index = table.find(self.parent, self)
		assert(current_index)
		if current_index then 
			for i = current_index - 1, 1, -1 do
				if not self.parent[i].Dock then
					assert(not IsKindOf(self.parent[i], "XPanelSizer"))
					self.panel1 = self.parent[i]
					break
				end
			end
			for i = current_index + 1, #self.parent do
				if not self.parent[i].Dock then
					assert(not IsKindOf(self.parent[i], "XPanelSizer"))
					self.panel2 = self.parent[i]
					break
				end
			end
		end
		if not self.panel1 or not self.panel2 then 
			self.valid = false 
		end
	end
end

function XPanelSizer:OnMouseButtonDown(pos, button)
	if not self.valid then return "break" end
	if button == "L" then
		self:SetFocus()
		self.desktop:SetMouseCapture(self)		
		self.drag_start_mouse_pos = pos
		self.drag_start_panel1_max_size = point(self.panel1.MaxWidth, self.panel1.MaxHeight)
		self.drag_start_panel2_max_size = point(self.panel2.MaxWidth, self.panel2.MaxHeight)
	end
	return "break"
end

function XPanelSizer:OnMousePos(new_pos)
	if self.valid and self.desktop:GetMouseCapture() == self then
		self:MovePanel(new_pos)
	end
	return "break"
end

local MulDivRoundPoint = MulDivRoundPoint

local function ElementwiseMax(min_value, point2)
	return point(Max(min_value, point2:x()), Max(min_value, point2:y()))
end

function XPanelSizer:MovePanel(new_pos)
	local old_pos = self.drag_start_mouse_pos
	local diff = new_pos - old_pos
	
	-- code is analogous to HPanel/VPanel's measure and layout methods
	local total_size = point(0, 0)
	local min_sizes = point(0, 0)
	local total_items = 0
	local panel_pixel_sizes = point(0, 0)
	for _, win in ipairs(self.parent) do
		if not win.Dock and not IsKindOf(win, "XPanelSizer") then
			local min_width, min_height, max_width, max_height = ScaleXY(win.scale, win.MinWidth, win.MinHeight, win.MaxWidth, win.MaxHeight)
			total_size = total_size + point(max_width, max_height)
			min_sizes = min_sizes + point(min_width, min_height)
			total_items = total_items + 1
			panel_pixel_sizes = panel_pixel_sizes + win.box:size()
		end
	end
	if self.is_horizontal then
		assert(total_size:x() >= 100000, "MaxWidths of HPanel's children should be > 1000000")
	else
		assert(total_size:y() >= 100000, "MaxHeights of VPanel's children should be > 1000000")
	end
	
	local pixels_to_distribute = panel_pixel_sizes - min_sizes
	if pixels_to_distribute:x() == 0 or pixels_to_distribute:y() == 0 then return end
	local pixels_to_max_space_units = MulDivRoundPoint(total_size - min_sizes, 1000, pixels_to_distribute)
	
	local prop_diff = MulDivRoundPoint(diff, pixels_to_max_space_units, 1000)
	local min_diff = MulDivRoundPoint(self.panel1.scale,
						- ElementwiseMax(0, self.drag_start_panel1_max_size - point(self.panel1.MinWidth, self.panel1.MinHeight)), 1000)
	local max_diff = MulDivRoundPoint(self.panel2.scale,
						ElementwiseMax(0, self.drag_start_panel2_max_size - point(self.panel2.MinWidth, self.panel2.MinHeight)), 1000)
	prop_diff = ClampPoint(prop_diff, box(min_diff, max_diff))
	
	local panel1_new_max_size = self.drag_start_panel1_max_size + MulDivRoundPoint(prop_diff, 1000, self.panel1.scale)
	local panel2_new_max_size = self.drag_start_panel2_max_size - MulDivRoundPoint(prop_diff, 1000, self.panel2.scale)
	
	if self.is_horizontal then
		self.panel1.MaxWidth = panel1_new_max_size:x()
		self.panel2.MaxWidth = panel2_new_max_size:x()
	else
		self.panel1.MaxHeight = panel1_new_max_size:y()
		self.panel2.MaxHeight = panel2_new_max_size:y()
	end
	
	self.panel1:InvalidateMeasure()
	self.panel2:InvalidateMeasure()
	self.parent:InvalidateLayout()
	self.parent:UpdateLayout()
end

function XPanelSizer:GetMouseTarget(pos)
	return self, self.Cursor
end

function XPanelSizer:OnMouseButtonUp(pos, button)
	if self.valid and self.desktop:GetMouseCapture() == self and button == "L" then
		self:OnMousePos(pos)
		self.desktop:SetMouseCapture()
	
		self.drag_start_mouse_pos = false
	end
	return "break"
end