I'm not that fluent in python, but

layout_final.addWidget(self.widgetGL) layout_final.addWidget(self.widget)

Horizontal layouts add stuff left to right, so, if anywhere, the GL widget would be on the left, not on the right.

I don't think a GL widget has any minimum size. It might be that the other widgets have "greedy" horizontal size policies (I think a label does by default). Try setting a minimum width or an expanding horizontal size policy on the GL widget.

Right.
This is not the first time I made such mistake. So the lifecycle of GraphicsScene is required for graphics view.

Thanks for the help. This is solved.

Hi, thanks!

I call the child QMainWindow from the parent QMainWindow as follows:

self.responseBox = responseBox(self)

This is the code initializing the child QMainWindow:

class responseBox(QMainWindow): def __init__(self, parent): QMainWindow.__init__(self, parent) self.setWindowFlags(QtCore.Qt.Window | QtCore.Qt.CustomizeWindowHint | QtCore.Qt.WindowMinimizeButtonHint | QtCore.Qt.WindowMaximizeButtonHint) self.setWindowModality(Qt.NonModal)

The full source code of the application is available online:
https://github.com/sam81/pychoacoustics
The child main window is created on line 834 here
and the code initializing it is here

I'll try to generate a small reproducible example and post it here as soon as I have time.

@SGaist Hi. Currently the default QDockWidget title bar shows label and close and float buttons. When you have 2 QDockWidgets tabbed, than the QTabBar appears abowe the title bar (if set to show QTabBar on North). I don't like this behaviour when you have title bar with label and abowe that tab with same label. It looks weird. It is not needed to have 2 labels. I know i can have custom title bar widget, but that means i will need somehow to handle when the QTabBar is visible and when not (to show/hide title bar so there are not redundant informations like label).

It could be best if i can hide the QTabBar, but still have that tabbify behaviour and some signal that is sended when QDockWidget is tabbed, so i can show everything in my custom title bar (like all tabs in that area, close/float buttons and other things i need).

I will probably need to copy all the files from Qt and do it by myself (qmainwindow, qmainwindowlayout, qdockarealayout, qdockwidget), but this will take lot of times as i saw it is around 10k lines of code.

@maximo
Ok :)
I am going to test again with stylesheets.
It would be very nice it it worked as docs says.
Or at least to understand why it did not.

Update:
Ok, one must unpolish/ polish each widget as doing it to
Mainwindow doesn't seems to work.
But it also works with
setStyleSheet(styleSheet());
in MainWindow to reload (whole) style sheet.

Update 2:
Ok. Having qframes with bool error property.
It will update in Designer, if setting it.
No code. Sheet on MWindow.
So it does work with properties it seems.

@SGaist The icon size is saved via QSettings in a QDialog called from a QMainWindow subclass. After the dialog is closed, QMainWindow::setIconSize() is called.

@mrjj Thank you !! It's working

You can't get a position of your window inside that window's constructor because it doesn't have one yet.
The window manager of your OS gives your window a position when it is first shown (or if you explicitly called move() before).
The window is shown when you call on it show()or any of the related functions like showMaximized().

After the window is shown you can get the window position including window frame with pos() and without the window frame with geometry().topLeft().

@Chris-Kawa I have found some threads (like https://forum.qt.io/topic/3765/moved-painting-in-the-nonclientarea) but the link to http://developer.qt.nokia.com/forums/viewthread/3331/ is dead and this very bad.

Yes my bad, I pointed you to the wrong property. Actually you must set the windowModality property : http://doc.qt.io/qt-5/qwidget.html#windowModality-prop, or the modal prop (only for QDialogs) : http://doc.qt.io/qt-5/qdialog.html#modal-prop. I believe that is the solution you've been looking for.

Hmm, it should work.

Can you post the code?

@Boman if the tool bar was set using addToolBar(toolbarWidget), you can show and hide the toolbarWidget to achieve your purpose

Yes, it is right indeed

For the moment I have made the GraphicsView 1 pixel shorter than the screen layout (i.e. 1920x1079) which makes everything work perfectly. I'm using an QGLWidget as the viewport for the GraphicsView. When I try to use the new QOpenGLWidget instead the (normal) widgets that are added on top of the graphics view are rendered correctly, however anything drawn using OpenGL flickers as soon as any part of the widget normal needs to be redrawn. E.g. when adding a QLineEdit and the cursor blinks or when text is inputted into the widget the parts drawn with OpenGL (in the graphicsview) flickers. Which makes it (QOpenGLWidget as a viewport) impossible to use in our case.