QDockWidgets without central widget

[marcel]

Well ,after looking closer, I reenabled the size constraints and size policies you added and the weird behavior is coming after all from the sizes you give.

- the windows may now be dropped more or less wherever I try to drop them. There still exists some issue with the resizing bars though, they won't allow me to shrink windows sometimes even though they are well above their minimum size (and the window on the opposite side of the bar is well below its maximum size).

Doc area no. 2 has a way too smaller maximum size and everything gets screwed by that.

1) When you start the application you can notice an empty area above the docs. That should not happen.

2) The docs cannot be moved nor resized normally, because doing so would break dock 2 maximum size. So the main window layout holds them in place.

So, one thing you should consider is being really careful when setting minimum/maximum sizes.
Widgets tend to behave well enough with their size hints given by their contents and/or layouts.

I do intend to save configurations programatically and restore these for the less meddlesome users, but I also want to accomodate those who want to tweak the display to their liking.

A complete example about this can be found in the demo I mentioned earlier.

Here's the dock function, in case you want to test it:

void MainWindow::createDockWindows()
{
    QDockWidget *dock = new QDockWidget(tr("One"), this);
    dock->setFeatures( QDockWidget::DockWidgetMovable );
    OneDisplaySA = new QScrollArea( dock );
 
    OneDisplay = new QLabel("", OneDisplaySA);
    OneDisplay->setText("xxx");
 
    OneDisplaySA->setBackgroundRole( QPalette::Dark );
    OneDisplaySA->setWidget( OneDisplay );
    OneDisplaySA->setMinimumSize( 600, 240 );
    OneDisplaySA->setMaximumSize( 1500,1000 );
    OneDisplaySA->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
    OneDisplaySA->ensureWidgetVisible( OneDisplay );
    dock->setWidget( OneDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());
 
    dock = new QDockWidget(tr("Two"), this);
    TwoDisplaySA = new QScrollArea( dock );
    TwoDisplay = new QLabel("XXX", TwoDisplaySA);
 
    TwoDisplaySA->setBackgroundRole( QPalette::Dark );
    TwoDisplaySA->setWidget( TwoDisplay );
    TwoDisplaySA->setMinimumSize( 300,120 );
    TwoDisplaySA->setMaximumSize( 500,240 );
    TwoDisplaySA->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    TwoDisplaySA->ensureWidgetVisible( TwoDisplay );
    dock->setWidget( TwoDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());
 
    dock = new QDockWidget(tr("Three"), this);
    ThreeDisplaySA = new QScrollArea( dock );
    ThreeDisplay = new QLabel("XXX", ThreeDisplaySA);
 
    ThreeDisplaySA->setBackgroundRole( QPalette::Dark );
    ThreeDisplaySA->setWidget( ThreeDisplay );
    ThreeDisplaySA->setMinimumSize( 120,120 );
    ThreeDisplaySA->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    ThreeDisplaySA->ensureWidgetVisible( ThreeDisplay );
    dock->setWidget( ThreeDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());
}

void MainWindow::createDockWindows()
{
    QDockWidget *dock = new QDockWidget(tr("One"), this);
    dock->setFeatures( QDockWidget::DockWidgetMovable );
    OneDisplaySA = new QScrollArea( dock );

    OneDisplay = new QLabel("", OneDisplaySA);
    OneDisplay->setText("xxx");

    OneDisplaySA->setBackgroundRole( QPalette::Dark );
    OneDisplaySA->setWidget( OneDisplay );
    OneDisplaySA->setMinimumSize( 600, 240 );
    OneDisplaySA->setMaximumSize( 1500,1000 );
    OneDisplaySA->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
    OneDisplaySA->ensureWidgetVisible( OneDisplay );
    dock->setWidget( OneDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());

    dock = new QDockWidget(tr("Two"), this);
    TwoDisplaySA = new QScrollArea( dock );
    TwoDisplay = new QLabel("XXX", TwoDisplaySA);

    TwoDisplaySA->setBackgroundRole( QPalette::Dark );
    TwoDisplaySA->setWidget( TwoDisplay );
    TwoDisplaySA->setMinimumSize( 300,120 );
    TwoDisplaySA->setMaximumSize( 500,240 );
    TwoDisplaySA->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    TwoDisplaySA->ensureWidgetVisible( TwoDisplay );
    dock->setWidget( TwoDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());

    dock = new QDockWidget(tr("Three"), this);
    ThreeDisplaySA = new QScrollArea( dock );
    ThreeDisplay = new QLabel("XXX", ThreeDisplaySA);

    ThreeDisplaySA->setBackgroundRole( QPalette::Dark );
    ThreeDisplaySA->setWidget( ThreeDisplay );
    ThreeDisplaySA->setMinimumSize( 120,120 );
    ThreeDisplaySA->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    ThreeDisplaySA->ensureWidgetVisible( ThreeDisplay );
    dock->setWidget( ThreeDisplaySA );
    addDockWidget(Qt::BottomDockWidgetArea, dock);
    viewMenu->addAction(dock->toggleViewAction());
}

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Regards