text: # ##### BEGIN GPL LICENSE BLOCK #####
  #
  #  This program is free software; you can redistribute it and/or
  #  modify it under the terms of the GNU General Public License
  #  as published by the Free Software Foundation; either version 2
  #  of the License, or (at your option) any later version.
  #
  #  This program is distributed in the hope that it will be useful,
  #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #  GNU General Public License for more details.
  #
  #  You should have received a copy of the GNU General Public License
  #  along with this program; if not, write to the Free Software Foundation,
  #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  #
  # ##### END GPL LICENSE BLOCK #####
  
  # <pep8 compliant>
  import bpy
  from bpy.types import Header, Menu, Panel
  
  
  def act_strip(context):
      try:
          return context.scene.sequence_editor.active_strip
      except AttributeError:
          return None
  
  
  class SEQUENCER_HT_header(Header):
      bl_space_type = 'SEQUENCE_EDITOR'
  
      def draw(self, context):
          layout = self.layout
  
          st = context.space_data
  
          row = layout.row(align=True)
          row.template_header()
  
          if context.area.show_menus:
              row.menu("SEQUENCER_MT_view")
  
              if st.view_type in {'SEQUENCER', 'SEQUENCER_PREVIEW'}:
                  row.menu("SEQUENCER_MT_select")
                  row.menu("SEQUENCER_MT_marker")
                  row.menu("SEQUENCER_MT_add")
                  row.menu("SEQUENCER_MT_strip")
  
          layout.prop(st, "view_type", expand=True, text="")
  
          if st.view_type in {'PREVIEW', 'SEQUENCER_PREVIEW'}:
              layout.prop(st, "display_mode", expand=True, text="")
  
          if st.view_type == 'SEQUENCER':
              row = layout.row(align=True)
              row.operator("sequencer.copy", text="", icon='COPYDOWN')
              row.operator("sequencer.paste", text="", icon='PASTEDOWN')
  
              layout.separator()
              layout.operator("sequencer.refresh_all")
          elif st.view_type == 'SEQUENCER_PREVIEW':
              layout.separator()
              layout.operator("sequencer.refresh_all")
              layout.prop(st, "display_channel", text="Channel")
          else:
              layout.prop(st, "display_channel", text="Channel")
  
              ed = context.scene.sequence_editor
              if ed:
                  row = layout.row(align=True)
                  row.prop(ed, "show_overlay", text="", icon='GHOST_ENABLED')
                  if ed.show_overlay:
                      row.prop(ed, "overlay_frame", text="")
                      row.prop(ed, "overlay_lock", text="", icon='LOCKED')
  
          layout.template_running_jobs()
  
  
  class SEQUENCER_MT_view_toggle(Menu):
      bl_label = "View Type"
  
      def draw(self, context):
          layout = self.layout
  
          layout.operator("sequencer.view_toggle").type = 'SEQUENCER'
          layout.operator("sequencer.view_toggle").type = 'PREVIEW'
          layout.operator("sequencer.view_toggle").type = 'SEQUENCER_PREVIEW'
  
  
  class SEQUENCER_MT_view(Menu):
      bl_label = "View"
  
      def draw(self, context):
          layout = self.layout
  
          st = context.space_data
  
          layout.operator("sequencer.properties", icon='MENU_PANEL')
  
          layout.separator()
  
          if st.view_type in {'SEQUENCER', 'SEQUENCER_PREVIEW'}:
              layout.operator("sequencer.view_all", text="View all Sequences")
          if st.view_type in {'PREVIEW', 'SEQUENCER_PREVIEW'}:
              layout.operator_context = 'INVOKE_REGION_PREVIEW'
              layout.operator("sequencer.view_all_preview", text="Fit preview in window")
              layout.operator("sequencer.view_zoom_ratio", text="Show preview 1:1").ratio = 1.0
              layout.operator_context = 'INVOKE_DEFAULT'
  
              # # XXX, invokes in the header view
              # layout.operator("sequencer.view_ghost_border", text='Overlay Border')
  
          layout.operator("sequencer.view_selected")
  
          if st.show_frames:
              layout.operator("anim.time_toggle", text="Show Seconds")
          else:
              layout.operator("anim.time_toggle", text="Show Frames")
  
          layout.prop(st, "show_frame_indicator")
          if st.display_mode == 'IMAGE':
              layout.prop(st, "show_safe_margin")
          if st.display_mode == 'WAVEFORM':
              layout.prop(st, "show_separate_color")
  
          layout.separator()
          layout.prop(st, "use_marker_sync")
          layout.separator()
  
          layout.operator("screen.area_dupli")
          layout.operator("screen.screen_full_area")
  
  
  class SEQUENCER_MT_select(Menu):
      bl_label = "Select"
  
      def draw(self, context):
          layout = self.layout
  
          layout.operator("sequencer.select_active_side", text="Strips to the Left").side = 'LEFT'
          layout.operator("sequencer.select_active_side", text="Strips to the Right").side = 'RIGHT'
          layout.separator()
          layout.operator("sequencer.select_handles", text="Surrounding Handles").side = 'BOTH'
          layout.operator("sequencer.select_handles", text="Left Handle").side = 'LEFT'
          layout.operator("sequencer.select_handles", text="Right Handle").side = 'RIGHT'
          layout.separator()
          layout.operator_menu_enum("object.select_grouped", "type", text="Grouped")
          layout.operator("sequencer.select_linked")
          layout.operator("sequencer.select_all_toggle")
          layout.operator("sequencer.select_inverse")
  
  
  class SEQUENCER_MT_marker(Menu):
      bl_label = "Marker"
  
      def draw(self, context):
          layout = self.layout
  
          #layout.operator_context = 'EXEC_REGION_WIN'
  
          layout.operator("marker.add", "Add Marker")
          layout.operator("marker.duplicate", text="Duplicate Marker")
          layout.operator("marker.delete", text="Delete Marker")
  
          layout.separator()
  
          layout.operator("marker.rename", text="Rename Marker")
          layout.operator("marker.move", text="Grab/Move Marker")
  
          #layout.operator("sequencer.sound_strip_add", text="Transform Markers") # toggle, will be rna - (sseq->flag & SEQ_MARKER_TRANS)
  
  
  class SEQUENCER_MT_change(Menu):
      bl_label = "Change"
  
      def draw(self, context):
          layout = self.layout
  
          layout.operator_context = 'INVOKE_REGION_WIN'
  
          layout.operator_menu_enum("sequencer.change_effect_input", "swap")
          layout.operator_menu_enum("sequencer.change_effect_type", "type")
          layout.operator("sequencer.change_path", text="Path/Files")
  
  
  class SEQUENCER_MT_add(Menu):
      bl_label = "Add"
  
      def draw(self, context):
          layout = self.layout
          layout.operator_context = 'INVOKE_REGION_WIN'
  
          if len(bpy.data.scenes) > 10:
              layout.operator_context = 'INVOKE_DEFAULT'
              layout.operator("sequencer.scene_strip_add", text="Scene...")
          else:
              layout.operator_menu_enum("sequencer.scene_strip_add", "scene", text="Scene...")
  
          layout.operator("sequencer.movie_strip_add", text="Movie")
          layout.operator("sequencer.image_strip_add", text="Image")
          layout.operator("sequencer.sound_strip_add", text="Sound")
  
          layout.menu("SEQUENCER_MT_add_effect")
  
  
  class SEQUENCER_MT_add_effect(Menu):
      bl_label = "Effect Strip..."
  
      def draw(self, context):
          layout = self.layout
          layout.operator_context = 'INVOKE_REGION_WIN'
  
          layout.operator("sequencer.effect_strip_add", text="Add").type = 'ADD'
          layout.operator("sequencer.effect_strip_add", text="Subtract").type = 'SUBTRACT'
          layout.operator("sequencer.effect_strip_add", text="Alpha Over").type = 'ALPHA_OVER'
          layout.operator("sequencer.effect_strip_add", text="Alpha Under").type = 'ALPHA_UNDER'
          layout.operator("sequencer.effect_strip_add", text="Cross").type = 'CROSS'
          layout.operator("sequencer.effect_strip_add", text="Gamma Cross").type = 'GAMMA_CROSS'
          layout.operator("sequencer.effect_strip_add", text="Multiply").type = 'MULTIPLY'
          layout.operator("sequencer.effect_strip_add", text="Over Drop").type = 'OVER_DROP'
          layout.operator("sequencer.effect_strip_add", text="Plugin").type = 'PLUGIN'
          layout.operator("sequencer.effect_strip_add", text="Wipe").type = 'WIPE'
          layout.operator("sequencer.effect_strip_add", text="Glow").type = 'GLOW'
          layout.operator("sequencer.effect_strip_add", text="Transform").type = 'TRANSFORM'
          layout.operator("sequencer.effect_strip_add", text="Color").type = 'COLOR'
          layout.operator("sequencer.effect_strip_add", text="Speed Control").type = 'SPEED'
          layout.operator("sequencer.effect_strip_add", text="Multicam Selector").type = 'MULTICAM'
          layout.operator("sequencer.effect_strip_add", text="Adjustment Layer").type = 'ADJUSTMENT'
  
  
  class SEQUENCER_MT_strip(Menu):
      bl_label = "Strip"
  
      def draw(self, context):
          layout = self.layout
  
          layout.operator_context = 'INVOKE_REGION_WIN'
  
          layout.operator("transform.transform", text="Grab/Move").mode = 'TRANSLATION'
          layout.operator("transform.transform", text="Grab/Extend from frame").mode = 'TIME_EXTEND'
          #  uiItemO(layout, NULL, 0, "sequencer.strip_snap"); // TODO - add this operator
          layout.separator()
  
          layout.operator("sequencer.cut", text="Cut (hard) at frame").type = 'HARD'
          layout.operator("sequencer.cut", text="Cut (soft) at frame").type = 'SOFT'
          layout.operator("sequencer.images_separate")
          layout.operator("sequencer.offset_clear")
          layout.operator("sequencer.deinterlace_selected_movies")
          layout.operator("sequencer.rebuild_proxy")
          layout.separator()
  
          layout.operator("sequencer.duplicate")
          layout.operator("sequencer.delete")
  
          strip = act_strip(context)
  
          if strip:
              stype = strip.type
  
              # XXX note strip.type is never equal to 'EFFECT', look at seq_type_items within rna_sequencer.c
              if stype == 'EFFECT':
                  pass
                  # layout.separator()
                  # layout.operator("sequencer.effect_change")
                  # layout.operator("sequencer.effect_reassign_inputs")
              elif stype == 'IMAGE':
                  layout.separator()
                  # layout.operator("sequencer.image_change")
                  layout.operator("sequencer.rendersize")
              elif stype == 'SCENE':
                  pass
                  # layout.separator()
                  # layout.operator("sequencer.scene_change", text="Change Scene")
              elif stype == 'MOVIE':
                  layout.separator()
                  # layout.operator("sequencer.movie_change")
                  layout.operator("sequencer.rendersize")
  
          layout.separator()
  
          layout.operator("sequencer.meta_make")
          layout.operator("sequencer.meta_separate")
  
          #if (ed && (ed->metastack.first || (ed->act_seq && ed->act_seq->type == SEQ_META))) {
          #	uiItemS(layout);
          #	uiItemO(layout, NULL, 0, "sequencer.meta_toggle");
          #}
  
          layout.separator()
          layout.operator("sequencer.reload")
          layout.operator("sequencer.reassign_inputs")
          layout.operator("sequencer.swap_inputs")
          layout.separator()
          layout.operator("sequencer.lock")
          layout.operator("sequencer.unlock")
          layout.operator("sequencer.mute")
          layout.operator("sequencer.unmute")
  
          layout.operator("sequencer.mute", text="Mute Deselected Strips").unselected = True
  
          layout.operator("sequencer.snap")
  
          layout.operator_menu_enum("sequencer.swap", "side")
  
          layout.separator()
  
          layout.operator("sequencer.swap_data")
          layout.menu("SEQUENCER_MT_change")
  
  
  class SequencerButtonsPanel():
      bl_space_type = 'SEQUENCE_EDITOR'
      bl_region_type = 'UI'
  
      @staticmethod
      def has_sequencer(context):
          return (context.space_data.view_type in {'SEQUENCER', 'SEQUENCER_PREVIEW'})
  
      @classmethod
      def poll(cls, context):
          return cls.has_sequencer(context) and (act_strip(context) is not None)
  
  
  class SequencerButtonsPanel_Output():
      bl_space_type = 'SEQUENCE_EDITOR'
      bl_region_type = 'UI'
  
      @staticmethod
      def has_preview(context):
          return (context.space_data.view_type in {'PREVIEW', 'SEQUENCER_PREVIEW'})
  
      @classmethod
      def poll(cls, context):
          return cls.has_preview(context)
  
  
  class SEQUENCER_PT_edit(SequencerButtonsPanel, Panel):
      bl_label = "Edit Strip"
  
      def draw(self, context):
          layout = self.layout
          scene = context.scene
          frame_current = scene.frame_current
          strip = act_strip(context)
  
          split = layout.split(percentage=0.3)
          split.label(text="Name:")
          split.prop(strip, "name", text="")
  
          split = layout.split(percentage=0.3)
          split.label(text="Type:")
          split.prop(strip, "type", text="")
  
          split = layout.split(percentage=0.3)
          split.label(text="Blend:")
          split.prop(strip, "blend_type", text="")
  
          row = layout.row(align=True)
          sub = row.row()
          sub.active = (not strip.mute)
          sub.prop(strip, "blend_alpha", text="Opacity", slider=True)
          row.prop(strip, "mute", toggle=True, icon='RESTRICT_VIEW_ON' if strip.mute else 'RESTRICT_VIEW_OFF', text="")
          row.prop(strip, "lock", toggle=True, icon='LOCKED' if strip.lock else 'UNLOCKED', text="")
  
          col = layout.column()
          sub = col.column()
          sub.enabled = not strip.lock
          sub.prop(strip, "channel")
          sub.prop(strip, "frame_start")
          sub.prop(strip, "frame_final_duration")
  
          col = layout.column(align=True)
          row = col.row()
          row.label(text="Final Length" + ": %s" % bpy.utils.smpte_from_frame(strip.frame_final_duration))
          row = col.row()
          row.active = (frame_current >= strip.frame_start and frame_current <= strip.frame_start + strip.frame_duration)
          row.label(text="Playhead" + ": %d" % (frame_current - strip.frame_start))
  
          col.label(text="Frame Offset" + " %d:%d" % (strip.frame_offset_start, strip.frame_offset_end))
          col.label(text="Frame Still" + " %d:%d" % (strip.frame_still_start, strip.frame_still_end))
  
          elem = False
  
          if strip.type == 'IMAGE':
              elem = strip.getStripElem(frame_current)
          elif strip.type == 'MOVIE':
              elem = strip.elements[0]
  
          if elem and elem.orig_width > 0 and elem.orig_height > 0:
              col.label(text="Orig Dim" + ": %dx%d" % (elem.orig_width, elem.orig_height))
          else:
              col.label(text="Orig Dim: None")
  
  
  class SEQUENCER_PT_effect(SequencerButtonsPanel, Panel):
      bl_label = "Effect Strip"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return strip.type in {'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
                                'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
                                'PLUGIN',
                                'WIPE', 'GLOW', 'TRANSFORM', 'COLOR', 'SPEED',
                                'MULTICAM', 'ADJUSTMENT'}
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
          if strip.input_count > 0:
              col = layout.column()
              col.prop(strip, "input_1")
              if strip.input_count > 1:
                  col.prop(strip, "input_2")
              if strip.input_count > 2:
                  col.prop(strip, "input_3")
  
          if strip.type == 'COLOR':
              layout.prop(strip, "color")
  
          elif strip.type == 'WIPE':
  
              col = layout.column()
              col.prop(strip, "transition_type")
              col.label(text="Direction:")
              col.row().prop(strip, "direction", expand=True)
  
              col = layout.column()
              col.prop(strip, "blur_width", slider=True)
              if strip.transition_type in {'SINGLE', 'DOUBLE'}:
                  col.prop(strip, "angle")
  
          elif strip.type == 'GLOW':
              flow = layout.column_flow()
              flow.prop(strip, "threshold", slider=True)
              flow.prop(strip, "clamp", slider=True)
              flow.prop(strip, "boost_factor")
              flow.prop(strip, "blur_radius")
  
              row = layout.row()
              row.prop(strip, "quality", slider=True)
              row.prop(strip, "use_only_boost")
  
          elif strip.type == 'SPEED':
              layout.prop(strip, "use_default_fade", "Stretch to input strip length")
              if not strip.use_default_fade:
                  layout.prop(strip, "use_as_speed")
                  if strip.use_as_speed:
                      layout.prop(strip, "speed_factor")
                  else:
                      layout.prop(strip, "speed_factor", text="Frame number")
                      layout.prop(strip, "scale_to_length")
  
              #doesn't work currently
              #layout.prop(strip, "use_frame_blend")
  
          elif strip.type == 'TRANSFORM':
              self.draw_panel_transform(strip)
  
          elif strip.type == "MULTICAM":
              layout.prop(strip, "multicam_source")
  
              row = layout.row(align=True)
              sub = row.row()
              sub.scale_x = 2.0
  
              sub.operator("screen.animation_play", text="", icon='PAUSE' if context.screen.is_animation_playing else 'PLAY')
  
              row.label("Cut To")
              for i in range(1, strip.channel):
                  row.operator("sequencer.cut_multicam", text=str(i)).camera = i
  
          col = layout.column(align=True)
          if strip.type == 'SPEED':
              col.prop(strip, "multiply_speed")
          elif strip.type in {'CROSS', 'GAMMA_CROSS', 'PLUGIN', 'WIPE'}:
                  col.prop(strip, "use_default_fade", "Default fade")
                  if not strip.use_default_fade:
                      col.prop(strip, "effect_fader", text="Effect fader")
  
          layout.prop(strip, "use_translation", text="Image Offset:")
          if strip.use_translation:
              col = layout.column(align=True)
              col.prop(strip.transform, "offset_x", text="X")
              col.prop(strip.transform, "offset_y", text="Y")
  
          layout.prop(strip, "use_crop", text="Image Crop:")
          if strip.use_crop:
              col = layout.column(align=True)
              col.prop(strip.crop, "max_y")
              col.prop(strip.crop, "min_x")
              col.prop(strip.crop, "min_y")
              col.prop(strip.crop, "max_x")
  
      def draw_panel_transform(self, strip):
          layout = self.layout
          col = layout.column()
  
          col.prop(strip, "interpolation")
          col.prop(strip, "translation_unit")
          col = layout.column(align=True)
          col.label(text="Position:")
          col.prop(strip, "translate_start_x", text="X")
          col.prop(strip, "translate_start_y", text="Y")
  
          layout.separator()
  
          col = layout.column(align=True)
          col.prop(strip, "use_uniform_scale")
          if (strip.use_uniform_scale):
              col = layout.column(align=True)
              col.prop(strip, "scale_start_x", text="Scale")
          else:
              col = layout.column(align=True)
              col.label(text="Scale:")
              col.prop(strip, "scale_start_x", text="X")
              col.prop(strip, "scale_start_y", text="Y")
  
          layout.separator()
  
          col = layout.column(align=True)
          col.label(text="Rotation:")
          col.prop(strip, "rotation_start", text="Rotation")
  
  
  class SEQUENCER_PT_input(SequencerButtonsPanel, Panel):
      bl_label = "Strip Input"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return strip.type in {'MOVIE', 'IMAGE', 'SCENE', 'META',
                                'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
                                'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
                                'PLUGIN',
                                'WIPE', 'GLOW', 'TRANSFORM',
                                'MULTICAM', 'SPEED', 'ADJUSTMENT'}
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
  
          seq_type = strip.type
  
          # draw a filename if we have one
          if seq_type == 'IMAGE':
              split = layout.split(percentage=0.2)
              col = split.column()
              col.label(text="Path:")
              col = split.column()
              col.prop(strip, "directory", text="")
  
              # Current element for the filename
  
              elem = strip.getStripElem(context.scene.frame_current)
              if elem:
                  split = layout.split(percentage=0.2)
                  col = split.column()
                  col.label(text="File:")
                  col = split.column()
                  col.prop(elem, "filename", text="")  # strip.elements[0] could be a fallback
  
              # also accessible from the menu
              layout.operator("sequencer.change_path")
  
          elif seq_type == 'MOVIE':
              split = layout.split(percentage=0.2)
              col = split.column()
              col.label(text="Path:")
              col = split.column()
              col.prop(strip, "filepath", text="")
              col.prop(strip, "mpeg_preseek", text="MPEG Preseek")
              col.prop(strip, "stream_index", text="Stream Index")
  
          # TODO, sound???
          # end drawing filename
  
          layout.prop(strip, "use_translation", text="Image Offset:")
          if strip.use_translation:
              col = layout.column(align=True)
              col.prop(strip.transform, "offset_x", text="X")
              col.prop(strip.transform, "offset_y", text="Y")
  
          layout.prop(strip, "use_crop", text="Image Crop:")
          if strip.use_crop:
              col = layout.column(align=True)
              col.prop(strip.crop, "max_y")
              col.prop(strip.crop, "min_x")
              col.prop(strip.crop, "min_y")
              col.prop(strip.crop, "max_x")
  
          if not isinstance(strip, bpy.types.EffectSequence):
              col = layout.column(align=True)
              col.label(text="Trim Duration (hard):")
              col.prop(strip, "animation_offset_start", text="Start")
              col.prop(strip, "animation_offset_end", text="End")
  
          col = layout.column(align=True)
          col.label(text="Trim Duration (soft):")
          col.prop(strip, "frame_offset_start", text="Start")
          col.prop(strip, "frame_offset_end", text="End")
  
  
  class SEQUENCER_PT_sound(SequencerButtonsPanel, Panel):
      bl_label = "Sound"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return (strip.type == 'SOUND')
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
  
          layout.template_ID(strip, "sound", open="sound.open")
  
          layout.separator()
          layout.prop(strip, "filepath", text="")
  
          row = layout.row()
          if strip.sound.packed_file:
              row.operator("sound.unpack", icon='PACKAGE', text="Unpack")
          else:
              row.operator("sound.pack", icon='UGLYPACKAGE', text="Pack")
  
          row.prop(strip.sound, "use_memory_cache")
  
          layout.prop(strip, "waveform")
          layout.prop(strip, "volume")
          layout.prop(strip, "pitch")
          layout.prop(strip, "pan")
  
          col = layout.column(align=True)
          col.label(text="Trim Duration:")
          col.prop(strip, "animation_offset_start", text="Start")
          col.prop(strip, "animation_offset_end", text="End")
  
  
  class SEQUENCER_PT_scene(SequencerButtonsPanel, Panel):
      bl_label = "Scene"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return (strip.type == 'SCENE')
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
  
          layout.template_ID(strip, "scene")
  
          scene = strip.scene
          if scene:
              layout.prop(scene.render, "use_sequencer")
  
          layout.label(text="Camera Override")
          layout.template_ID(strip, "scene_camera")
  
          if scene:
              sta = scene.frame_start
              end = scene.frame_end
              layout.label(text="Original frame range" + ": %d-%d (%d)" % (sta, end, end - sta + 1))
  
  
  class SEQUENCER_PT_filter(SequencerButtonsPanel, Panel):
      bl_label = "Filter"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return strip.type in {'MOVIE', 'IMAGE', 'SCENE', 'META',
                                'ADD', 'SUBTRACT', 'ALPHA_OVER', 'ALPHA_UNDER',
                                'CROSS', 'GAMMA_CROSS', 'MULTIPLY', 'OVER_DROP',
                                'PLUGIN',
                                'WIPE', 'GLOW', 'TRANSFORM', 'COLOR',
                                'MULTICAM', 'SPEED', 'ADJUSTMENT'}
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
  
          col = layout.column()
          col.label(text="Video:")
          col.prop(strip, "strobe")
  
          row = layout.row()
          row.label(text="Flip:")
          row.prop(strip, "use_flip_x", text="X")
          row.prop(strip, "use_flip_y", text="Y")
  
          col = layout.column()
          col.prop(strip, "use_reverse_frames", text="Backwards")
          col.prop(strip, "use_deinterlace")
  
          col = layout.column()
          col.label(text="Colors:")
          col.prop(strip, "color_saturation", text="Saturation")
          col.prop(strip, "color_multiply", text="Multiply")
          col.prop(strip, "use_premultiply")
          col.prop(strip, "use_float")
  
          layout.prop(strip, "use_color_balance")
          if strip.use_color_balance and strip.color_balance:  # TODO - need to add this somehow
              row = layout.row()
              row.active = strip.use_color_balance
              col = row.column()
              col.template_color_wheel(strip.color_balance, "lift", value_slider=False, cubic=True)
              col.row().prop(strip.color_balance, "lift")
              col.prop(strip.color_balance, "invert_lift", text="Inverse")
              col = row.column()
              col.template_color_wheel(strip.color_balance, "gamma", value_slider=False, lock_luminosity=True, cubic=True)
              col.row().prop(strip.color_balance, "gamma")
              col.prop(strip.color_balance, "invert_gamma", text="Inverse")
              col = row.column()
              col.template_color_wheel(strip.color_balance, "gain", value_slider=False, lock_luminosity=True, cubic=True)
              col.row().prop(strip.color_balance, "gain")
              col.prop(strip.color_balance, "invert_gain", text="Inverse")
  
  
  class SEQUENCER_PT_proxy(SequencerButtonsPanel, Panel):
      bl_label = "Proxy / Timecode"
  
      @classmethod
      def poll(cls, context):
          if not cls.has_sequencer(context):
              return False
  
          strip = act_strip(context)
          if not strip:
              return False
  
          return strip.type in {'MOVIE', 'IMAGE', 'SCENE', 'META', 'MULTICAM'}
  
      def draw_header(self, context):
          strip = act_strip(context)
  
          self.layout.prop(strip, "use_proxy", text="")
  
      def draw(self, context):
          layout = self.layout
  
          strip = act_strip(context)
  
          flow = layout.column_flow()
          flow.prop(strip, "use_proxy_custom_directory")
          flow.prop(strip, "use_proxy_custom_file")
          if strip.proxy:
              if strip.use_proxy_custom_directory and not strip.use_proxy_custom_file:
                  flow.prop(strip.proxy, "directory")
              if strip.use_proxy_custom_file:
                  flow.prop(strip.proxy, "filepath")
  
              row = layout.row()
              row.prop(strip.proxy, "build_25")
              row.prop(strip.proxy, "build_50")
              row.prop(strip.proxy, "build_75")
              row.prop(strip.proxy, "build_100")
  
              col = layout.column()
              col.label(text="Build JPEG quality")
              col.prop(strip.proxy, "quality")
  
              if strip.type == "MOVIE":
                  col = layout.column()
                  col.label(text="Use timecode index:")
  
                  col.prop(strip.proxy, "timecode")
  
  
  class SEQUENCER_PT_preview(SequencerButtonsPanel_Output, Panel):
      bl_label = "Scene Preview/Render"
      bl_space_type = 'SEQUENCE_EDITOR'
      bl_region_type = 'UI'
  
      def draw(self, context):
          layout = self.layout
          render = context.scene.render
  
          col = layout.column()
          col.active = False  # Currently only opengl preview works!
          col.prop(render, "use_sequencer_gl_preview", text="Open GL Preview")
          col = layout.column()
          #col.active = render.use_sequencer_gl_preview
          col.prop(render, "sequencer_gl_preview", text="")
  
          '''
          col = layout.column()
          col.prop(render, "use_sequencer_gl_render", text="Open GL Render")
          col = layout.column()
          col.active = render.use_sequencer_gl_render
          col.prop(render, "sequencer_gl_render", text="")
          '''
  
  
  class SEQUENCER_PT_view(SequencerButtonsPanel_Output, Panel):
      bl_label = "View Settings"
  
      def draw(self, context):
          layout = self.layout
  
          st = context.space_data
  
          col = layout.column()
          if st.display_mode == 'IMAGE':
              col.prop(st, "draw_overexposed")  # text="Zebra"
              col.prop(st, "show_safe_margin")
          if st.display_mode == 'WAVEFORM':
              col.prop(st, "show_separate_color")
          col.prop(st, "proxy_render_size")
  
  if __name__ == "__main__":  # only for live edit.
      bpy.utils.register_module(__name__)
  