addons/dialogic/Modules/StyleEditor/Components/style_layer_tree.gd

   1 @tool
   2 extends Tree
   3
   4 ## Script that handles drag and drop on the layer tree.
   5
   6
   7 signal layer_moved(from:int, to:int)
   8
   9 #region DRAG AND DROP
  10 ################################################################################
  11
  12 func _get_drag_data(position:Vector2) -> Variant:
  13         if get_selected() == null or get_selected() == get_root():
  14                 return
  15
  16         if find_parent('StyleEditor').current_style.inherits != null:
  17                 return
  18
  19         drop_mode_flags = DROP_MODE_INBETWEEN
  20         var preview := Label.new()
  21         preview.text = "     "+get_selected().get_text(0)
  22         preview.add_theme_stylebox_override('normal', get_theme_stylebox("Background", "EditorStyles"))
  23         set_drag_preview(preview)
  24
  25         return get_selected()
  26
  27
  28 func _can_drop_data(position:Vector2, data:Variant) -> bool:
  29         return data is TreeItem
  30
  31
  32 func _drop_data(position:Vector2, item:Variant) -> void:
  33         var to_item := get_item_at_position(position)
  34         var drop_section := get_drop_section_at_position(position)
  35
  36         if to_item == get_root():
  37                 if item.get_index() != 0:
  38                         layer_moved.emit(item.get_index(), 0)
  39                 return
  40
  41         if to_item == null:
  42                 if item.get_index() != get_root().get_child_count()-1:
  43                         layer_moved.emit(item.get_index(), get_root().get_child_count()-1)
  44                 return
  45
  46         var to_idx: int = to_item.get_index()+max(0, drop_section)
  47         if to_idx > item.get_index():
  48                 to_idx -= 1
  49
  50         if to_idx != item.get_index():
  51                 layer_moved.emit(item.get_index(), to_idx)
  52
  53 #endregion