58 lines
1.5 KiB
Markdown
58 lines
1.5 KiB
Markdown
# on Event
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Run some code when a button is clicked, pressed down, or released.
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```sig
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brick.buttonEnter.onEvent(ButtonEvent.Click, function () {
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});
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```
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## ~hint
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**Touch sensors**
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Your @boardname@ has touch sensors that work like buttons. Instead of saying `enter` or `left` as the source button, use a touch sensor block with a sensor name like `touch 1`.
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```block
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sensors.touch1.onEvent(TouchSensorEvent.Pressed, function () {
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brick.setLight(BrickLight.Orange);
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});
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```
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Read about [touch sensors](/reference/sensors/touch-sensor) and using them as touch buttons.
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## ~
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## Parameters
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* **ev**: the button action to run some code for. The button actions (events) are:
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> * ``click``: button was clicked (pressed and released)
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> * ``up``: button is released from just being pressed
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> * ``down``: button is just pressed down
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* **body**: the code you want to run when something happens with a button
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## Example
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Check for event on the ENTER button. Put a message on the screen when the button is pressed, clicked, or released.
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```blocks
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brick.showString("ENTER is: UP", 1);
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brick.buttonEnter.onEvent(ButtonEvent.Up, function () {
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brick.showString("ENTER is: UP ", 1);
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});
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brick.buttonEnter.onEvent(ButtonEvent.Down, function () {
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brick.showString("ENTER is: DOWN ", 1);
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});
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brick.buttonEnter.onEvent(ButtonEvent.Click, function () {
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brick.showString("ENTER was: CLICKED", 1);
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});
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```
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### See also
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[is pressed](/reference/brick/button/is-pressed),
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[was pressed](/reference/brick/button/was-pressed),
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[Touch sensor](/reference/sensors/touch-sensor)
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