how to center a Qt mainform on the screen?

pyqt5 center window on screen
qdesktopwidget
qt set window position
what is at the centre of the main screen

I've tried these in my mainform's constructor:

QRect desktopRect = QApplication::desktop()->availableGeometry(this);
move(desktopRect.center() - frameGeometry().center());

QRect desktopRect = QApplication::desktop()->availableGeometry(this);
move(desktopRect.center() - rect().center());

but both put the bottom right corner of the form at about the center of the screen, instead of centering the form. Any ideas?

I've tried these in my mainform's constructor

That's likely the problem. You probably don't have valid geometry information at this point because the object isn't visible.

When the object is first constructed, it's essentially positioned at (0,0) with it's expected (width,height), as such:

frame geometry at construction:  QRect(0,0 639x479) 

But, after being shown:

frame geometry rect:  QRect(476,337 968x507) 

Thus, you can't yet rely on your frameGeometry() information.

EDIT: With that said, I presume you can easily move it as desired, but for completeness I'm dropping in Patrice's code which doesn't depend on the frame geometry information:

QRect desktopRect = QApplication::desktop()->availableGeometry(this);
QPoint center = desktopRect.center();

move(center.x() - width() * 0.5, center.y() - height() * 0.5);

qt4 - how to center a Qt mainform on the screen?, I've tried these in my mainform's constructor. That's likely the problem. You probably don't have valid geometry information at this point because  The following method computes the final size of the window setting it so it covers the 90% of the whole screen available space, and then centers it (left-to-right flow):

The move function (see QWidget doc) takes one QPoint or two int as parameter. This corresponds to the coordinates of the top-left corner of your Widget (relative to its parent; Here OS Desktop). Try:

QRect desktopRect = QApplication::desktop()->availableGeometry(this);
QPoint center = desktopRect.center();

move(center.x()-width*0.5, center.y()-height*0.5);

How to center main window on screen?, I cannot find any information to center my main application window for the desktop. Just a standard program made in Designer, a mainform, and  I have a Qt application which needs to be loaded on mobile devices of different screen sizes. How do I make it autofit to the mobile device's screen size? qt user-interface mobile screen

#include <QStyle>
#include <QDesktopWidget>

window->setGeometry(
    QStyle::alignedRect(
        Qt::LeftToRight,
        Qt::AlignCenter,
        window->size(),
        qApp->desktop()->availableGeometry()
    )
);

https://wiki.qt.io/How_to_Center_a_Window_on_the_Screen

how to center a Qt mainform on the screen?, Question. I've tried these in my mainform's constructor: QRect desktopRect = QApplication::desktop()->availableGeometry(this); move(desktopRect.center()  It works fine but now I am trying to center the image widget instance at the center of my main window. My idea was to create a QHBoxLayout, add the image widget to that and then add the hBox instance to the ui->verticalLayout. Doesn't work.

availableGeometry() is deprecated.

move(pos() + (QGuiApplication::primaryScreen()->geometry().center() - geometry().center()));

How to Center a Window on the Screen, Qt supports bridging between C++ classes with the QML engine. the C++ framework and manipulate their properties before displaying them on screen. Therefore, create a new Qt Quick application project in Qt Creator and open up MainForm. After that, go to the Layout tab and enable both Vertical center anchor and  How to Center a Window on the Screen. From Qt Wiki. Jump to: navigation, search. En Ar Bg De El Es Fa Fi Fr Hi Hu It Ja Kn Ko Ms Nl Pl Pt Ru Sq Th Tr Uk Zh.

PyQT Python Version

# Center Window
desktopRect = QApplication.desktop().availableGeometry(self.window)
center = desktopRect.center();
self.window.move(center.x()-self.window.width()  * 0.5,
                 center.y()-self.window.height() * 0.5);   

Qt5 C++ GUI Programming Cookbook, the chore of hard-coding screen positions in our applications and ensure that windows set its alignment to Qt::AlignHCenter to horizontally center the text. Near the The main form shows a master–detail view of CDs and the tracks on the. Put a PyQt window to the screen center. Sometimes you want to position a window in the middle or center of the computer screen, with PyQt you can do that. To center a Python PyQt window (put it in the center of the screen), we need to do a bit of trickery: we need to get the window properties, center point and move it ourself.

[PDF] C++ GUI Programming with Qt 4, C++ Qt FAQ: How to put a dialog on the screen's center? Go back to The left hand pane is a list of all the available Qt GUI widgets that you can use in your applications. The overall I've tried these in my mainform's constructor. Get the full Qt  The QWindow class represents a window in the underlying windowing system. This class was introduced in Qt 5.0. A window that is supplied a parent becomes a native child window of their parent window. An application will typically use QWidget or QQuickView for its UI, and not QWindow directly. Still, it is possible to render directly to a

Qt center window, I tried this in my mainform constructor. This is probably the problem. You may not have valid geometry information at this time because the object is not visible. [qt5] center a window on screen. GitHub Gist: instantly share code, notes, and snippets.

‍🤝‍ 🤽 🤽 How to center the main Qt shape on the screen?, Qt and HTML5 for Symbian and MeeGo Daniel Zucker, Ray Rischpater NOTE: In a perfect world, there'd be no need for screen-scraping. Instead, the Sorting the network results and helping the user void MainForm::handleRequestFinished​() { mSortedModel->sort(0, align=\"center\">" "Select an item for more details. This tutorial describes how to use Qt Creator to implement Qt Quick states and transitions. We create an application that displays a Qt logo that moves between three rectangles on the page when you click them. For more information about using Qt Quick Designer, see Developing Qt Quick Applications.

Comments
  • I found it works if I call this->resize(width_I_want, height_I_want) before the code to center it. Thanks!
  • That's interesting. How does that change the frame geometry?
  • I'm not a fan of assuming window sizes, especially in the age of high-DPI displays and ever changing landscape of mobile devices.