Other window server events

When an event occurs under the window server, the framework calls the CCoeAppUi::HandleWsEventL() function of the UI controller object. To implement an event-handling code for a certain event, CCoeAppUi::HandleWsEventL() must be overridden. To ensure that the system works correctly, after catching an event in the overridden CCoeAppUi::HandleWsEventL() function the base class implementation should be called. The event type is identified by TEventCode, which is a data member of the window server event, TWsEvent.

void HandleWsEventL( const TWsEvent& aEvent, CCoeControl* aDestination )

All the event types are defined in the w32std.h.

Note: Some event types are not implemented in the system or are not available for third-party applications. All event codes from TEventCode::EEventUser() upwards can be used for the application-specific events (discussed in Application-specific events).

The following is a code example of the usage of a window server event:

void CMyAppUi::HandleWsEventL( const TWsEvent& aEvent,
                               CCoeControl* aDestination )
    // Call the base class implementation
    CEikAppUi::HandleWsEventL( aEvent, aDestination );
    if( aEvent.Type() == EEventKeyDown )
        // Do something
        iEikonEnv->InfoMsg( _L( “Key was pressed” ) );