Trigger timer example


The example shows how to use Defold built-in timer and trigger it asynchronously and uses two indicators:

  1. A counter text increased every 1s created using a text node.
  2. A text node with information displayed.

The timer triggers update of the counter every 1s. Click anywhere to trigger the callback of the timer asynchronously.




function init(self)
    self.count = 0            -- <1>
    local interval = 1        -- <2>
    local repeating = true    -- <3>

    self.timer = timer.delay(interval, repeating, function()    -- <4>
        self.count = self.count + 1                                -- <5>
        local node = gui.get_node("counter")                    -- <6>
        gui.set_text(node, self.count)                            -- <7>
    end)".", "acquire_input_focus")    -- <8>

function on_input(self, action_id, action)
    if action_id == hash("touch") and action.pressed then    -- <9>
        timer.trigger(self.timer)                            -- <10>

1. Start the count with value 0.
2. We will use interval of 1 [s].
3. We will be repeating the timer endlessly.
4. Start the timer with interval (1s) and repeating (true) and pass a callback function.
    Store the handle to the timer in self.timer.
5. The function will be called every 1s, so increase the count by 1 each time.
6. Get the counter text node.
7. Update the counter text node with an increased count.
8. Tell the engine that this game object wants to receive input.
9. If the user clicks.
10. Trigger the timer's callback function asynchronously using the saved self.timer handle.

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.