Qt获取屏幕DPI
作者:互联网
Qt在使用一些功能时需要用到DPI
Qt5.6已经可以自适应DPI与手动设置DPI
# 1. 使用MSVC
// Get desktop dc
HDC desktopDc = GetDC(NULL);
// Get native resolution
float horizontalDPI = GetDeviceCaps(desktopDc, LOGPIXELSX);
float verticalDPI = GetDeviceCaps(desktopDc, LOGPIXELSY);
int dpi = (horizontalDPI + verticalDPI) / 2;
int fontsize = 4 * dpi / 72; //8pt 144dpi is 4px
fontsize = fontsize > 8 ? fontsize : 8;
QFont MenuFont("SimHei", fontsize);
QApplication::setFont(MenuFont);
# 2. 使用 MinGW
#include <QPaintDevice>
//逻辑DPI
int horizontalDPI = logicalDpiX();
int verticalDPI = logicalDpiY();
//物理DPI (和逻辑DPI不一定相同)
int horizontalDPI = physicalDpiX();
int verticalDPI = physicalDpiY();
# 3. 分辨率
#include <QDesktopWidget>
int currentScreenWidth = QApplication::desktop()->width();
int currentScreenHeight = QApplication::desktop()->height();
//或者
QDesktopWidget* desktopWidget = QApplication::desktop();
//获取可用桌面大小
QRect deskRect = desktopWidget->availableGeometry();
//获取设备屏幕大小
QRect screenRect = desktopWidget->screenGeometry();
screenX = screenRect.width();
screenY = screenRect.height();
标签:horizontalDPI,Qt,int,QApplication,desktop,fontsize,屏幕,DPI 来源: https://www.cnblogs.com/mc-r/p/15851788.html