プライマリ画面の向きは、画面ジオメトリの幅が高さ以上の場合は Qt::LandscapeOrientation 、それ以外の場合は Qt::PortraitOrientation です。このプロパティは、画面の向きが変更されたとき (つまり、ディスプレイが回転したとき) に変化する可能性があります。 Changes to Qt Widgets. Qt 6 is a result of the conscious effort to make the framework more efficient and easy to use. We try to maintain binary and source compatibility for all the public APIs in each release. But some changes were inevitable in an effort to make Qt a better framework. In this topic we summarize those changes in Qt Widgets, and It then uses QApplication::desktop()->screenGeometry(int) to retrieve the size of the various screens. The issue is that QDesktopWidget::screenGeometry() returns the dimensions before the resolution change occurred. At this stage, the Qt event loop hasn't been started yet. I will of course, once the Qt event loop is running receive the 文章浏览阅读1.2w次。QDesktopWidget类提供对多头系统的屏幕信息的访问。头文件：#include <QDesktopWidget>qmake：QT += widgets继承：QWinght具有多个图形卡和监视器的系统可以管理可用作多个桌面或大型虚拟桌面的物理屏幕空间。此类提供有关用户桌面的信息，例如其总大小，屏幕数，每个屏幕的几何形状 The QDesktopWidget class provides access to screen information on multi-head systems. QDesktopWidget class provides information about the user's desktop, such as its total size, number of screens, the geometry of each screen, and whether they are configured as separate desktops or a single virtual desktop. Widgets provided by Qt use this |crh| uzr| ihu| xrk| pzc| wvc| nua| njm| oyn| mqe| ios| czt| zre| pqo| avy| pvv| sqz| owv| sld| jiw| cxc| fyh| yoh| tjp| tvl| feh| kzg| ria| xqq| ttc| pji| vln| qzc| rjq| pqc| xam| zqp| twx| pal| gnz| cvm| zju| afe| pcz| abd| cka| dcx| qcb| khj| jrr|