my first qt application, everythings ok, but background image get nothing. help me!!!

[mackluo]

#include <QtGui>
 
int main(int argc, char** argv){
    QApplication apps(argc, argv);
    apps.setApplicationName("Application Demo");
 
    QPalette palette;
    palette.setBrush(QPalette::Window, QBrush(QPixmap("demo.jpg")));
 
    QMainWindow wnds;
    wnds.setAutoFillBackground(true);
    wnds.setWindowTitle("QMainWindow Demo");
    wnds.setWindowFlags(wnds.windowFlags() & ~Qt::WindowMinimizeButtonHint & Qt::FramelessWindowHint);
    wnds.setPalette(palette);
    wnds.statusBar()->showMessage("StatusBar Ready");
    wnds.resize(800,600);       // pixmap.size()
    wnds.show();                // wnds.showMaximized();
 
    return apps.exec();
}

#include <QtGui>

int main(int argc, char** argv){
    QApplication apps(argc, argv);
    apps.setApplicationName("Application Demo");

    QPalette palette;
    palette.setBrush(QPalette::Window, QBrush(QPixmap("demo.jpg")));

    QMainWindow wnds;
    wnds.setAutoFillBackground(true);
    wnds.setWindowTitle("QMainWindow Demo");
    wnds.setWindowFlags(wnds.windowFlags() & ~Qt::WindowMinimizeButtonHint & Qt::FramelessWindowHint);
    wnds.setPalette(palette);
    wnds.statusBar()->showMessage("StatusBar Ready");
    wnds.resize(800,600);       // pixmap.size()
    wnds.show();                // wnds.showMaximized();

    return apps.exec();
}

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[Lykurg]

Hi,

what is

QPixmap p;
    qWarning() << p.load("demo.jpg");
    qWarning() << p.isNull();

QPixmap p;
    qWarning() << p.load("demo.jpg");
    qWarning() << p.isNull();

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telling you? I bet your path is wrong. As a solution use Qt's resource system to embed the image to your application or use a valid path...

[Oleg]

Your code works, so check path to the image.

[mackluo]

oh yes! qtWarning return QPixmap::load("demo.jpg") as false.
thanks everybody, this is very helpful. i should use qt's resource next time.