窗体部件之QDesktopWidget

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    qDebug() << size();

    QDesktopWidget* desktopWidget = QApplication::desktop();
    QRect deskAvailableGeometry = desktopWidget->availableGeometry();//获取可用桌面大小,不包括任务栏,QRect(0,0 1440x860)
    QRect screenGeometry = desktopWidget->screenGeometry();//获取整个屏幕大小,包括任务栏,QRect(0,0 1440x900)
    qDebug() << "deskAvailableGeometry: " << deskAvailableGeometry << ", screenGeometry: " << screenGeometry;

    int width = desktopWidget->width();
    int height = desktopWidget->height();//获取桌面的宽度和高度,1440x900
    qDebug() << "width: " << width << ", height: " << height;


    //抓取整个屏幕截图
//    fullScreenPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());//deprecated
//    fullScreenPixmap = QPixmap::grabWidget(this);//deprecated

    QScreen *screen = QGuiApplication::primaryScreen();
    if (screen)
        fullScreenPixmap = screen->grabWindow(0);//approved

//    fullScreenPixmap = this->grab();//approved

    //查看桌面窗口的儿子
    foreach (QObject *object, desktopWidget->children()) {
        if(object->isWidgetType())
        {
            qDebug() << "widget";
            QWidget *w = static_cast<QWidget*>(object);
            qDebug() << w->geometry();
        }
        if(object->isWindowType())
        {
            qDebug() << "window";
            QWindow *w = static_cast<QWindow*>(object);
            qDebug() <<  w->geometry();
        }
    }
}