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了解qt 对于屏幕的size#xff0c; geometry含义#xff0c; 更能有效实现最大化#xff0c; 向下还原逻辑操作
Test
目前我有两个屏 #xff0c;1920x1080#xff0c; 3840*2160. 检测当前程序所在screen#xff08;1920x1080#xff09;下属性
int screenNum…目的
了解qt 对于屏幕的size geometry含义 更能有效实现最大化 向下还原逻辑操作
Test
目前我有两个屏 1920x1080 3840*2160. 检测当前程序所在screen1920x1080下属性
int screenNum qApp-desktop()-screenNumber(this);if(screenNum 0){QScreen* screen qApp-screens().at(screenNum);qInfo() screen devicePixelRatio: screen-devicePixelRatio() screen logicalDotsPerInch: screen-logicalDotsPerInch() screen physicalDotsPerInch: screen-physicalDotsPerInch() screen physicalSize: screen-physicalSize() screen availableSize: screen-availableSize() screen availableVirtualSize: screen-availableVirtualSize() screen size: screen-size() screen availableGeometry: screen-availableGeometry() screen availableVirtualGeometry: screen-availableVirtualGeometry() screen virtualGeometry: screen-virtualGeometry() screen geometry: screen-geometry() screen-geometry().size();}打印结果
screen devicePixelRatio: 1 screen logicalDotsPerInch: 96 screen physicalDotsPerInch: 92.6073 screen physicalSize: QSizeF(527, 296) screen availableSize: QSize(1920, 1040) screen availableVirtualSize: QSize(5760, 2080) screen size: QSize(1920, 1080) screen availableGeometry: QRect(0,0 1920x1040) screen availableVirtualGeometry: QRect(-3840,-515 5760x2080) screen virtualGeometry: QRect(-3840,-515 5760x2160) screen geometry: QRect(0,0 1920x1080) QSize(1920, 1080)
移除任务栏后
screen devicePixelRatio: 1 screen logicalDotsPerInch: 96 screen physicalDotsPerInch: 92.6073 screen physicalSize: QSizeF(527, 296) screen availableSize: QSize(1920, 1080) screen availableVirtualSize: QSize(5760, 2160) screen size: QSize(1920, 1080) screen availableGeometry: QRect(0,0 1920x1080) screen availableVirtualGeometry: QRect(-3840,-515 5760x2160) screen virtualGeometry: QRect(-3840,-515 5760x2160) screen geometry: QRect(0,0 1920x1080) QSize(1920, 1080)
结果你会发现 screen availableSize: 高度增加了40px。screen availableGeometry: QRect(0,0 1920x1040) 也是。而实际的screen geometry: QRect(0,0 1920x1080) QSize(1920, 1080) 与物理size没有改变。只有充分知道QScreen相关属性 才能更好写出多屏下相关处理操作。
