我可以通过API设置QT_AUTO_SCREEN_SCALE_FACTOR行为吗? [英] Can I set QT_AUTO_SCREEN_SCALE_FACTOR behavior via API?
问题描述
我可以设置 QT_AUTO_SCREEN_SCALE_FACTOR 1
行为通过API调用而不是环境变量?我想检测我的Qt应用程序是否在高dpi屏幕上运行,然后相应地设置缩放。
Can I set the QT_AUTO_SCREEN_SCALE_FACTOR 1
behavior via an API call rather than by the environment variable? I want to detect if my Qt application is running on a high dpi screen, then set the scaling accordingly.
我试图将它设置在 main
的开头,无效
I have tried to set it at the very beginning of main
, which does not work
QProcessEnvironment::systemEnvironment().insert("QT_AUTO_SCREEN_SCALE_FACTOR", "1");
这意味着与QProcess一起使用,
子进程。它不能用于更改当前进程的
环境。
It's meant to be used along with QProcess, to set the environment for child processes. It cannot be used to change the current process's environment.
推荐答案
以下应该工作
qputenv(QT_AUTO_SCREEN_SCALE_FACTOR,1);
qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1");
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