Qt 获取屏幕 和窗口大小

Posted 2023-04-27

参考技术A 参考：https://blog.csdn.net/xuebin5260/article/details/50483179

https://blog.csdn.net/u013541325/article/details/106966650?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_baidulandingword-0&spm=1001.2101.3001.4242

//获取可用桌面大小

    QRect deskRect = QApplication::desktop()->availableGeometry();

    int w = deskRect.width();

    int h =deskRect.height();

  //获取主屏幕分辨率

  QRect screenRect = QApplication::desktop()->screenGeometry();

  //获取屏幕数量

  int nScreenCount = QApplication::desktop()->screenCount();

    int width = this->width();//获取窗口宽度

    int height = this->height();

    int test = 10;

QT 13 窗口屏幕设置大小与居中显示

<pre name="code" class="cpp">#include "mainwindow.h"
#include <QApplication>
#include <QDesktopWidget>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    QDesktopWidget *desktop=QApplication::desktop();
    w.resize(desktop->width()*3/4,desktop->height()*3/4);
    w.move((desktop->width()-w.width())/2,
           (desktop->height()-w.height())/2);
    
    return a.exec();
}