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Re: Custom actions on Minimize or Close button [message #12972 is a reply to message #12850]

Sat, 01 December 2007 17:57

amit
Messages: 17
Registered: November 2007

Promising Member

hi,
I want to have some additional processing on application exit.
The code given by lokki should work but few point to be cleared are:

by overriding WindowProc ((--------all we have to-------)) do is:

this is for minimize example ..


// implementation of WndProc
LRESULT MyWindow::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	if (message == WM_SYSCOMMAND && wParam == SC_MINIMIZE)
	{
		My_Custom_Function(); // -------------------------------------------------------this does  not have to be a CallBack but any function can well do.
		return 0;  //-----------------------------------------------------add this line if you want to ignore the actual minimizing else remove it.
	}
	return TopWindow::WindowProc(message, wParam, lParam);
}

i am not able to get the Close thing ... wait i'll check the U++ source and let you know ...

ok got it for working out "custom closing" do so ..

there are two ways ...

first ...

virtual void Close()
{
  ... // custom code
  ...
  ...
  TopWindow::Close(); // call this if you want to actually close window after custom processing
}

or the second ...

my_window_app::my_window_app()
{
...
WhenClose = THISBACK(custom_action_function);  // WhenClose is a member of your baseclass already do not re-declare it ..
...
}


........

my_window_app::custom_action_function()
{
  ... // custom code
  ...
  ...
  Close(); // the TopWindow Close would be called as Close() is not re-defined in this case
}

and i think WhenMinimize CallBack is not there ... correct me if wrong.

[Updated on: Sat, 01 December 2007 17:59]

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