QWidget repaint on 2nd extend screen during display mode changes.

[nothingmag]

Hello, All

Newbie here.

Scenario:
2 monitors connects together. Current Window display mode is extended.
Widget A is located on extended screen.

Operation:
Switch Window display mode from extended to duplicate, back to extend.
Widget A does not paint correctly. (looks like getting cutted)

Once I use mouse click on Widget A, drag it and move, Widget A shows correctly.

Question:
How can I make Widget A paint properly on extend screen ?

[d_stranz]

The QGuiApplication and QScreen classes have signals that are emitted when the display configuration changes. I am guessing that your application is not responding to these signals and is not resizing your widgets correctly. Resizing or moving a widget will automatically generate a paint event.

Look at the signals QGuiApplication::primaryScreenChanged(), QGuiApplication::screenAdded(), and QGuiApplication::screenRemoved() as well as the static methods QGuiApplication::primaryScreen() and QGuiApplication::screens() and the signal QScreen::geometryChanged().