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Class  >  window  >  Closing(class,string)
window class : Closing(class,string) method

Description

Assigns a handler to the "Closing" event.

Syntax

instance.Closing(class handleClass, string signature)

Arguments

ClassNameDescription
classhandleClassAn instance with the handler as the member.
stringsignatureSignature of the handler.

Return value

ClassDescription
switchAn instance to control handler execution.

Sample code

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)");

Notes

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.

keyvalue - classvalue - description
SenderwindowThe origin of the event.
SwitchswitchThe switch returned by the handler assignment.
CancelboolWhether to cancel the event.

The handler runs in the UI thread.

Links for reference

None.

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