@Ocram10 said in Resize QMainWindow and QDialog:

proprietà di windows "Ridimensionamento e layout"

Dove trovi questa variabile?

@Fuel the exemples in pyqt-master do it automatically but i don't understsnd what event or property they use

@eDeviser said in Customizing QMainWindow by style sheet:

Yes, this helps!

I see the QMainWindow holds a QWidget which is set as cetralWidget. So It would be necessary to set the QMainWindow as centralWidget or to apply my css for the QWidget.

0_1501135343432_3169fb05-5a7c-4700-9cd0-ae074842feab-image.png

Thank you for this hint.

You have to apply your css in your qwidget !

Your css should be :

centralWidget {
background: yellow;
width: 10px; /* when vertical /
height: 10px; / when horizontal */
}

centralWidget:hover {
background: red;
}

You should care about QSizePolicy and sizeHint of your widgets inside QDockWidget. ;)

Hi, and welcome. The image upload function on our forum is broken, the uploaded images might be visible to you, but they aren't to anyone else. See this thread for a workaround.

@mrjj
Thanks for the reply!
I followed your advice and tried setting the panelWindow as the parent...
No change..

Any other ideas?
I followed this link,
http://doc.qt.io/qt-5/qmacnativewidget.html#details

Hi SGaist and thank for the help.

For the code being in the constructor when it should not be, I only did it that way to have the simplest code possible to show my issue. I understand and agree with your point. I am working on an already existing application, I created this QtCreator project to isolate and replicate the issue. I do not call QWidget::show() in the constructor of my application.

I have made an important discovery while working on this issue: calling blue_widget->show() at the end of my code in my QtCreator project does fixe the problem, but doing the same in my application does not fix the issue. This is the 1st time I see a different behavior, I thought I had manage to have the same 1:1 behavior between the QtCreator project and my application.

Thanks for the help, I will keep looking.

@pauledd
:)
class MyWidget : public QWidget << yes that is subclassing :)

Also, a widget can only paint on it self.
its not possible to paint on other widget from inside a
paintevent.
Thats why the first sample didnt work. You asked painter to paint on tab from inside mainwindows paintEvent :)
I guess you already found out but its just to make clear for other readers.

@SGaist
I just want 1 window with the forms changing for the login and presentation windows.
And then ill use dialog windows after the presentation window.
Anyways thank you. Ill try QStackedWidget.

I need to be as big as the screen.
Before I used this code to display it as big as the screen

int Height = 0; int Width = 0; foreach (QScreen *screen, QGuiApplication::screens()) { if(QGuiApplication::primaryScreen()->name() == screen->name()) { QRect rec = screen->availableGeometry(); Height = rec.height(); Width = rec.width(); } } w.setFixedSize(Width,Height);

Unfortunately, I do not know why, the height is still longer than the screen. This is why I decided to use showMaximized (), unfortunately this does not seem to go well for both systems.

Thank you all, I will try to use your advice.

@AyushExel204
It is indeed strange. I haven't worked with that library, but I see no good reason that is should work with VlcMediaPlayer but not with VlcMediaListPlayer. In this example (graciously provided by @mrjj over chat), they don't seem to use VlcMediaListPlayer and as you said that should work. Perhaps you can use it to build upon. Also you might want to search through the library's bugtracker to see if there is something known about this issue.

Hi, just to want add, while Qt Creator's capturing of your qDebug() output is usually 100%, but if you want to be sure to get everything, you could try running DebugView when your app exits.

I had to add Q_OBJECT and also delete my debug folder once, to get rid of a few link errors.

Also got rid of the QThread subclassing, it is way easier to create a worker class and connect it through signals. There is really a lot of outdated example code out there.

Thanks for your help!

IMO it's a code smell to rely on the OS to clean up for you.

We run all of our unit tests through valgrind as part of our build process, so that a memory leak breaks the build.

QT leaves a ridiculous amount of memory lying around, which of course kicks off valgrind.

We've got a huge suppressions file which we have to install for every GUI related unit test, and the sheer number of suppressions makes valgrind run slower, so has resulted in longer build times.

So yeah, in my opinion, it would be nice if QT didn't do that.

That's not how it works and not something I would expect either.

The mdi sub-windows will only extend in the mdi area, nothing more.

The behavior you are looking for, you'll have to implement yourself.

Basically, it's not a part of Qt that you access directly. It's part of the platform plugins that abstracts away the differences between the various supported OSs.

The best I can recommend is to contact the KDE folks about how the startup notification is handled by them.

Hi,

One way to do it would be to set the minimal size of your central widget or the maximal width of the QDockWidget contained widget.

Hope it helps.

@kshegunov

I think I got it! I have included to the painterEvent the following:

QPixmap pm(200, 200); pm.fill(Qt::white); setPixmap(pm);

Now I can set the text from other class like:

ui->label->setText("lala");

However, I think I shouldn't set Pixmap inside paintEvent - better to do it in the other class so this type of label could be also used for other labels, right?

EDIT:

I liked the idea of @jsulm. Could you give me some hints how to achieve it? How to get the painting functionality from a standard QLabel and then add some additional my own painting?

@Chris-Kawa
Totally agree.