Qt-interest Archive, February 2007
How to disable the X button on windows?
Message 1 in thread
My users just found a stupid error on my part. If they click the "close
window" button it kills the app. I need it to close the window and
cancel what they were doing.
However, I can't seem to find out how to disconnect the current signals
and connect the ones I want. Thoughts or help?
Since that X button is window manager stuff does it end up being a
close() signal to the window or a quit() signal to the app. Or something
else?
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Message 2 in thread
On 2/2/07, Allen, Matthew <allenm@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> My users just found a stupid error on my part. If they click the "close
> window" button it kills the app. I need it to close the window and
> cancel what they were doing.
>
> However, I can't seem to find out how to disconnect the current signals
> and connect the ones I want. Thoughts or help?
>
> Since that X button is window manager stuff does it end up being a
> close() signal to the window or a quit() signal to the app. Or something
> else?
The "X" button generates a QCloseEvent. You need to reimplement the
closeEvent() event handler.
-larry
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Message 3 in thread
You can do that,
I think one of the QT examples has something like:
.hh:
class MyWindow: public QMainWindow
{
Q_OBJECT
public:
(...)
protected:
void closeEvent(QCloseEvent *event);
};
.cc:
void MyWindow::closeEvent(QCloseEvent *event)
{
if (it_is_ok_to_close)
{
event->accept();
}
else
{
event->ignore();
}
}
Regards,
Nuno
On Friday 02 February 2007 12:17, Larry Martell wrote:
> > close() signal to the window or a quit() signal to the app. Or something
> > else?
>
> The "X" button generates a QCloseEvent. You need to reimplement the
> closeEvent() event handler.
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Message 4 in thread
On 2/2/07, Allen, Matthew <allenm@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> My users just found a stupid error on my part. If they click the "close
> window" button it kills the app. I need it to close the window and
> cancel what they were doing.
>
> However, I can't seem to find out how to disconnect the current signals
> and connect the ones I want. Thoughts or help?
>
> Since that X button is window manager stuff does it end up being a
> close() signal to the window or a quit() signal to the app. Or something
> else?
Handle this by overriding QWidget::closeEvent(). Note that ignoring
the event will let you cancel the close attempt - see
http://doc.trolltech.com/4.2/mainwindows-application.html for an
example.
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