WIP: Support dragging and dropping block resources to the canvas

dylanmccall · dylanmccall · commit 987af25cd977 · 2024-08-23T16:08:02.000-07:00
Ideally, this work will allow us to replace our own DragManager and
instead use the drag and drop system built in to Godot.
diff --git a/addons/block_code/ui/block_canvas/block_canvas.gd b/addons/block_code/ui/block_canvas/block_canvas.gd
@@ -2,6 +2,7 @@
 extends MarginContainer
 
 const BlockCodePlugin = preload("res://addons/block_code/block_code_plugin.gd")
+const BlockDefinition = preload("res://addons/block_code/code_generation/block_definition.gd")
 const BlockTreeUtil = preload("res://addons/block_code/ui/block_tree_util.gd")
 const DragManager = preload("res://addons/block_code/drag_manager/drag_manager.gd")
 const InstructionTree = preload("res://addons/block_code/instruction_tree/instruction_tree.gd")
@@ -55,6 +56,27 @@ func _ready():
 	_populate_block_scenes_by_class()
 
 
+func _can_drop_data(at_position: Vector2, data: Variant) -> bool:
+	return true
+
+
+func _drop_data(at_position: Vector2, data: Variant) -> void:
+	if typeof(data) != TYPE_DICTIONARY:
+		return
+
+	data = data as Dictionary
+
+	if data.get("type") != "files":
+		return
+
+	for file in data.get("files", []):
+		var resource = load(file)
+		if resource is BlockDefinition:
+			var block = Util.instantiate_block(resource)
+			add_block(block, at_position)
+			reconnect_block.emit(block)
+
+
 func _populate_block_scenes_by_class():
 	for _class in ProjectSettings.get_global_class_list():
 		if not _class.base.ends_with("Block"):
diff --git a/addons/block_code/ui/block_canvas/block_canvas.tscn b/addons/block_code/ui/block_canvas/block_canvas.tscn
@@ -15,10 +15,12 @@ script = ExtResource("1_tk8h2")
 
 [node name="Panel" type="Panel" parent="."]
 layout_mode = 2
+mouse_filter = 2
 
 [node name="WindowContainer" type="Control" parent="."]
 clip_contents = true
 layout_mode = 2
+mouse_filter = 2
 
 [node name="Window" type="Control" parent="WindowContainer"]
 unique_name_in_owner = true
