protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
if (!PerMonitorDpiService.IsSupported) return;
this.systemDpi = this.GetSystemDpi();
this.source = PresentationSource.FromVisual(this) as HwndSource;
if (this.source != null)
{
this.currentDpi = this.source.GetDpi();
this.ChangeDpi(this.currentDpi);
this.source.AddHook(this.WndProc);
}
}
public bool Equals(Dpi other)
{
return this.X == other.X && this.Y == other.Y;
}
private void ChangeDpi(Dpi dpi)
{
if (!PerMonitorDpiService.IsSupported) return;
this.DpiScaleTransform = (dpi == this.systemDpi)
? Transform.Identity
: new ScaleTransform((double)dpi.X / this.systemDpi.X, (double)dpi.Y / this.systemDpi.Y);
this.Width = this.Width * dpi.X / this.currentDpi.X;
this.Height = this.Height * dpi.Y / this.currentDpi.Y;
this.currentDpi = dpi;
}