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Triggers

Event Triggers serve as the initiators of interactive behavior in your UI, defining precisely when your application should respond to user input or system events. Each trigger acts as a listener, constantly monitoring for specific interactions—from simple clicks to complex gestures or system state changes.

thermostat

thermostat

Available Triggers​

Interaction​

  • Pressed - Activates when an object has been pressed
  • Clicked - Activates when an object was pressed for a short period of time, then released (not called if scrolled)
  • Released - Triggers when a press is released
  • Checked - The widget is checked
  • Unchecked - The widget is unchecked
  • Pressing - Continuously triggered while the object is being pressed
  • Long pressed repeat - Called after long_press_time in every long_press_repeat_time ms (not called if scrolled)
  • Long pressed - Activates when an object has been pressed for a longer period of time
  • Short clicked - Activates when a short click is detected
  • Press lost - Triggers when a press is interrupted

Gesture​

  • Gesture up - Detects upward gesture on a widget
  • Gesture right - Detects rightward gesture on a widget
  • Gesture down - Detects downward gesture on a widget
  • Gesture left - Detects leftward gesture on a widget

Scroll​

  • Scroll - Triggers during scrolling operations
  • Scroll begin - Called when scrolling starts
  • Scroll end - Called when scrolling ends
  • Scroll throw begin - Triggers when a scroll momentum throw begins

Focus/Input​

  • Indev reset - Input device reset event
  • Key - A key is sent to the widget
  • Focused - Activates when an object gains focus
  • Defocused - Triggers when an object loses focus
  • Leave - Called when the pointer leaves the object
  • Hit test - Used for hit testing operations

Operation​

  • Cancel - A process has been cancelled
  • Value changed - The value of the object has been changed
  • Refresh - Widget needs to be refreshed
  • Insert - Something has been inserted
  • Ready - A process has finished

Lifecycle​

  • Create - Widget creation event
  • Delete - Widget deletion event

Child Management​

  • Child changed - A child widget has been changed
  • Child created - A child widget has been created
  • Child deleted - A child widget has been deleted

Screen​

  • Screen unloaded - A screen was unloaded, called when all animations are finished
  • Screen loaded - A screen was loaded, called when all animations are finished
  • Screen load start - A screen load started, fired when the screen change delay is expired
  • Screen unload start - Triggered at the beginning of a screen transition, activating immediately when a screen change is initiated

Layout​

  • Get self size - Get the widget's size
  • Style changed - Widget style has been changed
  • Layout changed - Layout has been changed
  • Size changed - Widget size has been changed## Complete your Event

To complete an event, you'll need to add at least one action that defines what happens when the trigger occurs. To learn more about how actions work and the various options available, visit our documentation by clicking here.