CloseEvent of QDockWidget

[mstegehu]

Hello,

With the designer I created a MainWindow with a few DockWidgets. The widget of the DockWidget I promoted to my custom widget. Works nice.

But the closeEvent of the DockWidget is not forwarded to the widget of the DockWidget. Therefor I can not handle a graceful close of my custom widget. (CustomWidget::closeEvent (QCloseEvent) not called);

How can I handle the close of the DockWidget so I can graceful close the custom widget?

Regards,

Marcel

[TMan]

Did you re-implement closeEvent in your subclass? Maybe you can provide the header file?

[mstegehu]

Yes I did reimplement the CustomWidget::closeEvent (QCloseEvent) and that one is not called. If I look at the QDockWidget::closeEvent I see that it only calls its inherited class and not its childeren. So I think that the QDockWidget:: closeEvent does not propagate the close event to the widgets that are set with setWidget.

I could use the VisibilityChanged signal I guess.

Regards,

Marcel

[TMan]

My example below works and I think that's what you want. Compare with your code to see what's wrong

Main.cpp:

#include <QtCore>
#include <QtGui>
#include <Test.h>
 
int main (int argc, char **argv)
{
    QApplication app (argc, argv);
 
    QMainWindow *w = new QMainWindow();
    Test *lDW = new Test("Test", w);
    w->show();
 
    return app.exec();
}

#include <QtCore>
#include <QtGui>
#include <Test.h>

int main (int argc, char **argv)
{
    QApplication app (argc, argv);
    
    QMainWindow *w = new QMainWindow();
    Test *lDW = new Test("Test", w);
    w->show();
    
    return app.exec();
}

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Test.h:

#include <QtGui>
 
class Test : public QDockWidget
{
    Q_OBJECT
 
public:
    Test (const QString &title, QWidget *parent = 0, Qt::WindowFlags flags = 0) : QDockWidget (title, parent, flags)
    {
    }
 
protected:
    void closeEvent (QCloseEvent *event)
    {
        printf ("closeEvent!\n");
    }
};

#include <QtGui>

class Test : public QDockWidget
{
    Q_OBJECT
    
public:
    Test (const QString &title, QWidget *parent = 0, Qt::WindowFlags flags = 0) : QDockWidget (title, parent, flags)
    {
    }
    
protected:
    void closeEvent (QCloseEvent *event)
    {
        printf ("closeEvent!\n");
    }
};

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[mstegehu]

I definitly want that but it is slightly more complex as I use the designer. The designer generates this code:

m_dockWidget = new QDockWidget(MainWindowBase);
        ...
        m_customWidget = new CustomWidget();
        ...
        m_dockWidget ->setWidget(m_dockWidget );
        MainWindowBase->addDockWidget(static_cast<Qt::DockWidgetArea>(4), m_dockWidget );

m_dockWidget = new QDockWidget(MainWindowBase);
        ...
        m_customWidget = new CustomWidget();
        ...
        m_dockWidget ->setWidget(m_dockWidget );
        MainWindowBase->addDockWidget(static_cast<Qt::DockWidgetArea>(4), m_dockWidget );

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In my custom widget I would like to know the close event of its parent (dockwidget).

In the designer the custom widget is set using the 'promote to' option.

Regards,

Marcel

[aamer4yu]

From the parent, pass on the close event info to the child... hope u can do that