SWT: Relationship between underlying events and advanced events

At the bottom layer, the system still uses the underlying events (the underlying events here refer to non-type events, not the underlying events of the OS, and the conversion of OS events and SWT events will be further summarized in the future ).

An Advanced event is just a matter of name.

 

From the source code, we can see that advanced events are actually added to the underlying events. The source code snippets extracted from control are as follows.

 

Org. Eclipse. SWT. Control
Controlistener event

Public void addcontrollistener (controllistener listener ){
Checkwidget ();
If (listener = NULL) error (SWT. error_null_argument );
Typedlistener = new typedlistener (listener );
Addlistener (SWT. Resize, typedlistener); // The underlying events added here
Addlistener (SWT. Move, typedlistener );
}