text: #ifndef ANIMATION_BLEND_SPACE_EDITOR_H
  #define ANIMATION_BLEND_SPACE_EDITOR_H
  
  #include "editor/editor_node.h"
  #include "editor/editor_plugin.h"
  #include "editor/property_editor.h"
  #include "scene/animation/animation_blend_space.h"
  #include "scene/gui/button.h"
  #include "scene/gui/graph_edit.h"
  #include "scene/gui/popup.h"
  #include "scene/gui/tree.h"
  /**
  	@author Juan Linietsky <reduzio@gmail.com>
  */
  
  class AnimationNodeBlendSpaceEditor : public VBoxContainer {
  
  	GDCLASS(AnimationNodeBlendSpaceEditor, VBoxContainer);
  
  	Ref<AnimationNodeBlendSpace> blend_space;
  
  	HBoxContainer *goto_parent_hb;
  	ToolButton *goto_parent;
  
  	PanelContainer *panel;
  	ToolButton *tool_blend;
  	ToolButton *tool_select;
  	ToolButton *tool_create;
  	ToolButton *tool_triangle;
  	VSeparator *tool_erase_sep;
  	ToolButton *tool_erase;
  	ToolButton *snap;
  	SpinBox *snap_x;
  	SpinBox *snap_y;
  
  	ToolButton *auto_triangles;
  
  	LineEdit *label_x;
  	LineEdit *label_y;
  	SpinBox *max_x_value;
  	SpinBox *min_x_value;
  	SpinBox *max_y_value;
  	SpinBox *min_y_value;
  
  	HBoxContainer *edit_hb;
  	SpinBox *edit_x;
  	SpinBox *edit_y;
  	Button *open_editor;
  
  	int selected_point;
  	int selected_triangle;
  
  	Control *blend_space_draw;
  
  	PanelContainer *error_panel;
  	Label *error_label;
  
  	bool updating;
  
  	UndoRedo *undo_redo;
  
  	static AnimationNodeBlendSpaceEditor *singleton;
  
  	void _blend_space_gui_input(const Ref<InputEvent> &p_event);
  	void _blend_space_draw();
  
  	void _update_space();
  
  	void _config_changed(double);
  	void _labels_changed(String);
  	void _snap_toggled();
  
  	PopupMenu *menu;
  	PopupMenu *animations_menu;
  	Vector<String> animations_to_add;
  	Vector2 add_point_pos;
  	Vector<Vector2> points;
  
  	bool dragging_selected_attempt;
  	bool dragging_selected;
  	Vector2 drag_from;
  	Vector2 drag_ofs;
  
  	Vector<int> making_triangle;
  
  	void _add_menu_type(int p_index);
  	void _add_animation_type(int p_index);
  
  	void _tool_switch(int p_tool);
  	void _update_edited_point_pos();
  	void _update_tool_erase();
  	void _erase_selected();
  	void _edit_point_pos(double);
  	void _open_editor();
  
  	void _goto_parent();
  
  	void _removed_from_graph();
  
  	void _auto_triangles_toggled();
  
  protected:
  	void _notification(int p_what);
  	static void _bind_methods();
  
  public:
  	static AnimationNodeBlendSpaceEditor *get_singleton() { return singleton; }
  	void edit(AnimationNodeBlendSpace *p_blend_space);
  	AnimationNodeBlendSpaceEditor();
  };
  
  class AnimationNodeBlendSpaceEditorPlugin : public EditorPlugin {
  
  	GDCLASS(AnimationNodeBlendSpaceEditorPlugin, EditorPlugin);
  
  	AnimationNodeBlendSpaceEditor *anim_tree_editor;
  	EditorNode *editor;
  	Button *button;
  
  public:
  	virtual String get_name() const { return "BlendSpace"; }
  	bool has_main_screen() const { return false; }
  	virtual void edit(Object *p_object);
  	virtual bool handles(Object *p_object) const;
  	virtual void make_visible(bool p_visible);
  
  	AnimationNodeBlendSpaceEditorPlugin(EditorNode *p_node);
  	~AnimationNodeBlendSpaceEditorPlugin();
  };
  #endif // ANIMATION_BLEND_SPACE_EDITOR_H
  