Window.QueryClose Method (Typed) |  |
Provide a method that is invoked just before the window closes to confirm if the application really wants to close the window.
Provide a method that is invoked just before the window closes to confirm if the application really wants to close the window.
Namespace: XSharp.VO.SDK
Assembly: XSharp.VOGUIClasses (in XSharp.VOGUIClasses.dll) Version: 2.21
SyntaxRequest Example
View Source
The method inside the window class always returns TRUE. If you override this method in your subclass then you must return TRUE if the window is to be closed; otherwise, return FALSE.
The method inside the window class always returns TRUE. If you override this method in your subclass then you must return TRUE if the window is to be closed; otherwise, return FALSE.
Parameters
- oEvent
- Type: Event
An empty event required to maintain the protocol that all event handlers have exactly one event as their argument.An empty event required to maintain the protocol that all event handlers have exactly one event as their argument.
Return Value
Type: LogicThe method inside the window class always returns TRUE. If you override this method in your subclass then you must return TRUE if the window is to be closed; otherwise, return FALSE.
Return Value
Type: LogicThe method inside the window class always returns TRUE. If you override this method in your subclass then you must return TRUE if the window is to be closed; otherwise, return FALSE.
Remarks Tip |
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| Important! This is a callback method used by X#. Normally, it should not be called in your application code. |
| Tip |
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| If you reimplement this method in your subclass, it is recommended that you first call SUPER:QueryClose() within the method to obtain its default behavior. |
Remarks| Tip |
|---|
| Important! This is a callback method used by X#. Normally, it should not be called in your application code. |
| Tip |
|---|
| If you reimplement this method in your subclass, it is recommended that you first call SUPER:QueryClose() within the method to obtain its default behavior. |
Examples
This example displays a message box to confirm that a user wants to quit the application. If a user chooses YES, TRUE is returned (otherwise, FALSE is returned).
X#
1METHOD QueryClose(oEvent) CLASS TopAppWindow 2oTB := TextBox{SELF, "Quit", "Do you really want to quit?"} 3oTB:TYPE := BOXICONQUESTIONMARK + BUTTONYESNO 4IF (oTB:Show() = BOXREPLYYES) 5RETURN TRUE // Quit application. 6ELSE 7RETURN FALSE 8// Don't quit the application. 9END
Examples
This example displays a message box to confirm that a user wants to quit the application. If a user chooses YES, TRUE is returned (otherwise, FALSE is returned).
X#
1METHOD QueryClose(oEvent) CLASS TopAppWindow 2oTB := TextBox{SELF, "Quit", "Do you really want to quit?"} 3oTB:TYPE := BOXICONQUESTIONMARK + BUTTONYESNO 4IF (oTB:Show() = BOXREPLYYES) 5RETURN TRUE // Quit application. 6ELSE 7RETURN FALSE 8// Don't quit the application. 9END
See Also