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Pointer over

A GUI box node with an image texture and a script that react when pointer over this node.

button

The “gui” game object contains a GUI component stored in the file pointer_over.gui. The GUI contains the setup with the “button” box node for the button image and the “text” text node for the button label text.

pointer_over.gui has a script attached to it, called pointer_over.gui_script, which contains the button logic.

button gui

pointer_over.gui_script

function init(self)
  msg.post(".", "acquire_input_focus") 
  self.button = gui.get_node("button") 
  self.text = gui.get_node("text") 
  self.is_over = false 
end

function on_input(self, action_id, action)
  if action_id == nil then --<5>
    if gui.pick_node(self.button, action.x, action.y) then 
      if not self.is_over then
        gui.set_text(self.text, "HELLO!") 
        self.is_over = true
      end
    else
      if self.is_over then
        gui.set_text(self.text, "BUTTON") 
        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. 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.
  7. Change the label text in pointer over case.
  8. Change the label text to default value.

If you want to play with these examples, you can get the project on Github.

Do you want to see more examples? Why not write a few yourself and submit a pull request? We love contributions.

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