Dear all, I just purchased a 4K monitor and plugged it on a Windows 10 system in order to test my Qt Desktop application with high DPI displays. The system scaling is set to 200%.
I have set the Qt::AA_EnableHighDpiScaling as explained in the doc, and the app display gets scaled. However, I have encountered the following issues : 1) The window title bar is not scaled and appears super small. I have not implemented any custom title bar painting, and my window is a regular QMainWindow. The title bar is displayed natively with the OS theme (Aero with Windows 7, Metro with Windows 10). But : it is super small with my app, and only with my app. Other software have a properly sized title bar. 2) The icons are pixellated, despite the fact that resource pixmaps are 256x256. I'm talking about icons from the UIs made with Qt designer, such as regular QActions dropped into QMainWindow toolbars. 3) The native file selection dialog displayed with QFileDialog is super small (this may be related to 1) : it seems that when Qt uses some native painting, it is not scaled) I'm using Qt 5.6.2 Do you have any idea? Thanks! Etienne
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