window class : Closing(class,string) method

Description

Assigns a handler to the "Closing" event.

instance.Closing(class handleClass, string signature)

Class	Name	Description
class	handleClass	An instance with the handler as the member.
string	signature	Signature of the handler.

Class	Description
switch	An instance to control handler execution.

Suppose you have the following class definition.

1:	class handle
2:	open method void CHandler(dictionary dic)
3:	switch sw = dic.Switch;
4:	endmethod
5:	endclass

Handler assignment is as follows.

1:	window w = new window();
2:	handle h = new handle();
3:	switch sw = w.Closing(h,"CHandler(dictionary)");

The "Closing" event occurs just before the window is closed.

You can cancel the event by assigning true to the 'Cancel' key of the handler argument. If you cancel, the window will not close.

The handler for the "Closing" event must be an open method with one argument of the dictionary class.

In other words, if the method name of the handler is "handlerName", the definition of the handler is as follows.

open method void handlerName(dictionary dic)

...

endmethod

In this case, the signature of the handler specify by the second argument is "handlerName(dictionary)".

The dictionary passed to the handler has the following key/value pairs.

key	value - class	value - description
Sender	window	The origin of the event.
Switch	switch	The switch returned by the handler assignment.
Cancel	bool	Whether to cancel the event.

The handler runs in the UI thread.

None.