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| bdf3e9818cd84d37a18ee5680e97e1c1 |
view on: demo kit nightly build | demo kit latest release
Event handler methods are invoked when an event occurs. Method names starting with on are reserved for event handler methods.
For common events, such as click or keydown, it is sufficient to add a handler method. These events are defined in the module sap/ui/events/ControlEvents. As OpenUI5 core automatically registers browser event handlers for these methods, they are called automatically. OpenUI5 core also fires events with a richer semantic meaning, so that control developers do not need to check various keycodes.
onclick: function(oEvent) {
alert("Control " + this.getId() + " was clicked.");
}There are also OpenUI5-specific event handlers, which can be used for reacting on specific situations. These are onBeforeRendering, onAfterRendering, onlocalizationChanged (note the lower case 'l'), and onThemeChanged.
Internally used events, which start with "sap", are defined in the sap/ui/events/PseudoEvent module. An example is the sapnext event, which is triggered by "arrow down" or "arrow right" (or "arrow left" in right-to-left mode). The sapnext event performs all checks that are required to check whether the user wants to navigate to the next item. The event object that is passed to the handler method contains more information. These methods are private methods and must only be called by OpenUI5 core.
onsapnext: function(events) {
// navigate to next item, an arrow key was pressed
}Related Information