Implement main screen.

addons/draw_gd/plugin.gd

@@ -2,6 +2,9 @@ tool
 extends EditorPlugin
 
 const _icon : Texture = preload("res://addons/draw_gd/icons/icon_copy.png")
+const _scene : PackedScene = preload("res://addons/draw_gd/src/Main.tscn")
+
+var main_node : Node = null
 
 func has_main_screen():
 	return true
@@ -16,10 +19,27 @@ func get_plugin_name():
 func _enter_tree():
 	#add_autoload_singleton("DrawGD", "res://addons/draw_gd/src/Autoload/DrawGD.gd")
 	
-	pass
+	main_node = _scene.instance()
+	
+	get_editor_interface().get_editor_viewport().add_child(main_node)
+	
+	make_visible(false)
+	
 
 func _exit_tree():
 	#remove_autoload_singleton("DrawGD")
 	
+	if main_node:
+		main_node.queue_free()
+
+
+func make_visible(visible):
+	if !main_node:
+		return
+	
+	if visible:
+		main_node.show()
+	else:
+		main_node.hide()
+		
 		
-	pass

addons/draw_gd/src/Main.tscn

@@ -16,6 +16,8 @@
 [node name="DrawGDControl" type="Control"]
 anchor_right = 1.0
 anchor_bottom = 1.0
+size_flags_horizontal = 3
+size_flags_vertical = 3
 script = ExtResource( 1 )
 __meta__ = {
 "_edit_horizontal_guides_": [  ],