set QMainWindow in the center of my desktop

Hi everybody,

QT: 4.1.3
OS: WinXP PRO
Compiler: MINGW

I am trying to set my app in the midle of my desktop. How can i do tha?Should i use setCentralWidget??

Code:

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#include <QApplication>
#include "mainwindow.h"
 
 
     int main(int argc, char *argv[])
    {
 
 
        QApplication app(argc, argv);
        app.setStyle("plastique"); 
        app.setPalette( app.style()->standardPalette() );
        MainWindow m;
        m.setMinimumSize(451,600);
        m.setMaximumSize(451,600);
       // m.setCentralWidget();
 
        m.show();
        return app.exec(); 
    }

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QDesktopWidget provides access to screen geometries.

This gives you what you want (copy to constructor of your "MainWindow"):

Code:

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QDesktopWidget *desktop = QApplication::desktop();
 
int screenWidth, width; 
int screenHeight, height;
int x, y;
QSize windowSize;
 
screenWidth = desktop->width(); // get width of screen
screenHeight = desktop->height(); // get height of screen
 
windowSize = size(); // size of our application window
width = windowSize.width(); 
height = windowSize.height();
 
// little computations
x = (screenWidth - width) / 2;
y = (screenHeight - height) / 2;
y -= 50;
 
// move window to desired coordinates
move ( x, y );

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Code:

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QRect r = widget->geometry();
r.moveCenter(QApplication::desktop()->availableGeometry().center());
widget->setGeometry(r);

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Be aware that constructor of a widget may not always be a reliable place to ask widget for it's geometries...

In the QWidget subclass object construtor, add this line:

this->move(QApplication::desktop()->screen()->rect().center()-this->rect().center());

Hi everybody!!

Now i have a lot of solutions :p

It works :p

Thanks to all

Code:

---

int main(int argc, char *argv[])
    {
 
 
        QApplication app(argc, argv);
        app.setStyle("plastique"); 
        app.setPalette( app.style()->standardPalette() );
        MainWindow m;
        m.setMinimumSize(451,600);
        m.setMaximumSize(451,600);
       QRect r = m.geometry();
       r.moveCenter(QApplication::desktop()->availableGeometry().center());
       m.setGeometry(r); 
 
        m.show();
        return app.exec(); 
    }

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These functions are obsolete:

Code:

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QApplication::desktop()->screenGeometry()
QApplication::desktop()->availableGeometry()
QDesktopWidget::screen()

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Use QScreen instead:

Code:

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#include "MainWindow.h"
#include "ui_MainWindow.h"
#include <QScreen>
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    move(QGuiApplication::screens().at(0)->geometry().center() - frameGeometry().center());
}

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