minor comments

demos/gui/drag_and_drop/drag_drop_script.gd

@@ -1,27 +1,24 @@
 
 extends ColorPickerButton
 
-# member variables here, example:
-# var a=2
-# var b="textvar"
+
+#virtual function
 func get_drag_data(pos):
 	
-	#use another control as drag preview
+	#use another colorpicker as drag preview
 	var cpb = ColorPickerButton.new()
 	cpb.set_color( get_color() )
 	cpb.set_size(Vector2(50,50))
 	set_drag_preview(cpb)
 	#return color as drag data
 	return get_color()
-	
+
+#virtual function	
 func can_drop_data(pos, data):
 	return typeof(data)==TYPE_COLOR
-	
+
+#virtual function
 func drop_data(pos, data):
 	set_color(data)
 		
-func _ready():
-	# Initialization here
-	pass
-