2016-10-21 9:22 GMT+02:00 Elvis Stansvik <[email protected]>: > Using > > QApplication::desktop()->screenNumber(widget); > > it's possible to get the screen number of the screen where the widget > is mostly visible. > > But how can I be notified when this changes for a particular widget? > > Must I monitor the widget's moveEvent/resizeEvent/... myself, and > check if the screen number changed since last time? What about changes > to the screen configuration (switching monitors) which causes to > widget to appear on another screen? > > The reason I want to be notified is that I'm using another API, VTK, > which has a quite primitive SetDPI for controlling the DPI used during > font rendering, and since I was using Qt anyway, I was thinking of > using Qt for DPI detection (since VTK doesn't have any cross platform > detection) and also for the detection of when the widget changes > screen, to know which screen to query for its DPI.
As a rough approximation, I tried connecting to QWindow::screenChanged of the window() for the widget, but it was never emitted when I moved the window between monitors. Elvis > > Thanks in advance, > Elvis _______________________________________________ Interest mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/interest
