WPF Application same size at every system scale (scale independent)
Finally found an answer. First get system DPI scale using one of the options below:
- Read from registry
AppliedDPIdword located inComputer\HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics. Then divide it by 96. Or use this snippet:
double dpiFactor = System.Windows.PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice.M11;that returns a value between 1.0 to 2.5
Then create a config file that holds application settings and set dpiFactor as default scale. If user preferred a custom scale, call this function on window startup:
private void UserInterfaceCustomScale(double customScale){ // Change scale of window content MainContainer.LayoutTransform = new ScaleTransform(customScale, customScale, 0, 0); Width *= customScale; Height *= customScale; // Bring window center screen var screenHeight = System.Windows.SystemParameters.PrimaryScreenHeight; var screenWidth = System.Windows.SystemParameters.PrimaryScreenWidth; Top = ( screenHeight - Height ) / 2; Left = ( screenWidth - Width ) / 2;}