add is_er trigger

examples/gui/pointer_over/pointer_over.gui_script

@@ -1,26 +1,34 @@
 function init(self)
-	msg.post(".", "acquire_input_focus") -- <1>
-	self.button = gui.get_node("button") -- <2>
-	self.text = gui.get_node("text") -- <3>
+  msg.post(".", "acquire_input_focus") -- <1>
+  self.button = gui.get_node("button") -- <2>
+  self.text = gui.get_node("text") -- <3>
+  self.is_over = false -- <4>
 end
 
 function on_input(self, action_id, action)
-	if action_id == nil then --<4>
-		if gui.pick_node(self.button, action.x, action.y) then -- <5>
-			gui.set_text(self.text, "HELLO!") -- <6>
-		else
-			gui.set_text(self.text, "BUTTON") -- <7>
-		end
-	end
+  if action_id == nil then --<5>
+    if gui.pick_node(self.button, action.x, action.y) then -- <6>
+      if not self.is_over then
+        gui.set_text(self.text, "HELLO!") -- <7>
+        self.is_over = true
+      end
+    else
+      if self.is_over then
+        gui.set_text(self.text, "BUTTON") -- <8>
+        self.is_over = false
+      end
+    end
+  end
 end
 
 --[[
 1. Tell the engine that this game object wants to receive input.
 2. Get the instance for the node named "button" (the button box).
 3. Get the instance for the node named "text" (the button label).
-4. If action_id equal nil (pointer is moving)
-5. Check if the pointer position (`action.x` and `action.y`) is within the boundaries of 
+4. Trigger for locking multiple execution.
+5. If action_id equal nil (pointer is moving)
+6. Check if the pointer position (`action.x` and `action.y`) is within the boundaries of
    the button node.
-6. Change the label text in pointer over case.
-7. Change the label text to default value.
+7. Change the label text in pointer over case.
+8. Change the label text to default value.
 --]]