Qt::Tool

As soon as I setWindowFlags(Qt::Tool) strange things start happening. :)

The window does not get keyboard focus on startup.
When closing with the X in the upper right corder, the process is not terminated (but it does when called via slot aApp quit().
Also closeEvent(QCloseEvent *event) does not get called.

It does this with an otherwise empty test project.

There's a Qt example program windowflags, but this one gets terminated when choosing a Tool window.
What could this be?

P.s. I'm using qdevelop, great tool, and the project is in debug mode.

[edit] I think a window with Qt::Tool flag cannot be a normal mainwindow. It is a qwidget in the windowflags example, not a qmainwindow.

Could you provide a minimal compilable example we could try ourselves?

When reading your post, it looks like you are trying to put a QT::tool flag on a widget inside a QMainWindow.

If that is the case, it is correct that strange things will happen, as it tries making a tool window out of your widget inside a QMainWindow. Try using the QT::tool flag on either a dialog or the mainwindow directly if you are trying to have a tooltip-like-window

@jpn
Sorry I hadn't noticed your question untill now.

Code:

---

#include <QApplication>
#include "mainwindowimpl.h"
//
int main(int argc, char ** argv)
{
	QApplication app( argc, argv );
	MainWindowImpl win;
	win.show(); 
	app.connect( &app, SIGNAL( lastWindowClosed() ), &app, SLOT( quit() ) );
	return app.exec();
}

---

Code:

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#include "mainwindowimpl.h"
//
MainWindowImpl::MainWindowImpl( QWidget * parent, Qt::WFlags f) 
	: QMainWindow(parent, f)
{
setupUi(this);
setWindowFlags(Qt::Tool);
}

---

Code:

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#ifndef MAINWINDOWIMPL_H
#define MAINWINDOWIMPL_H
//
#include <QMainWindow>
#include "ui_mainwindow.h"
//
class MainWindowImpl : public QMainWindow, public Ui::MainWindow
{
Q_OBJECT
public:
	MainWindowImpl( QWidget * parent = 0, Qt::WFlags f = 0 );
private slots:
};
#endif

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@luf
Well no, it's on a main window as you can see.
The example 'windowsflags' uses a widget to set Qt::Tool and is working,

Alright, I found the reason. QWidget::create() clears the Qt::WA_QuitOnClose attribute for anything but Qt::Window, Qt::Widget or Qt::Dialog. The workaround is to call for example QWidget::show() first, and set the attribute by hand afterwards:

Code:

---

#include <QtGui>
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QMainWindow win(0, Qt::Tool);
    win.show(); // must be called before setting Qt::WA_QuitOnClose
    win.setAttribute(Qt::WA_QuitOnClose);
    return app.exec();
}

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Thanks jpn,

There is another issue. That window does not get focus at startup. Calling setFocus() in main or in the constructor does not help.

Looks like you have to explicitly activate the window:

Code:

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win.activateWindow();

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Grr, that won't set focus jpn. Neither in main nor constructor.
:)

Quote:

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Originally Posted by jpn

Looks like you have to explicitly activate the window:

Code:

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win.activateWindow();

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Alright, this seems to be something WM specific then. While it worked on Windows the window stays inactive on X11. Try this:

Code:

---

// main.cpp
#include <QtGui>
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
    public:
        MainWindow(QWidget* parent = 0, Qt::WindowFlags flags = 0)
            : QMainWindow(parent, flags)
        {
            setCentralWidget(new QTextEdit(this));
        }
 
    public slots:
        void activateWindow()
        {
            QMainWindow::activateWindow();
        }
};
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    MainWindow win(0, Qt::Tool);
    win.show(); // must be called before setting Qt::WA_QuitOnClose
    win.setAttribute(Qt::WA_QuitOnClose);
    QTimer::singleShot(0, &win, SLOT(activateWindow()));
    return app.exec();
}
 
#include "main.moc"

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PS. Could you update your profile to indicate used platforms, please?

Works! Thanks.

Quote:

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Originally Posted by jpn

Alright, this seems to be something WM specific then. While it worked on Windows the window stays inactive on X11. Try this:

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Done. Only ubuntu so far, on win I used c++ builder.

Quote:

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PS. Could you update your profile to indicate used platforms, please?

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