protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
this._source = PresentationSource.FromVisual(this) as HwndSource;
if (this._source == null) return;
this._systemDpi = this._source.GetSystemDpi();
this._isPerMonitorDpiSupported = PerMonitorDpiHelper.IsSupported;
if (this._isPerMonitorDpiSupported)
{
this._currentDpi = this._source.GetMonitorDpi();
this.OnDpiChanged(this._currentDpi, new NativeRect());
this._source.AddHook(this.WindowProcedure);
this._hooked = true;
}
else
{
this._currentDpi = this._systemDpi;
}
}
protected virtual void OnDpiChanged(Dpi suggestedDpi, NativeRect suggested)
{
this.DpiScaleTransform = (suggestedDpi == this._systemDpi)
? Transform.Identity
: new ScaleTransform((double)suggestedDpi.X / this._systemDpi.X, (double)suggestedDpi.Y / this._systemDpi.Y);
if (!this._borderClicked)
{
this.Width = this.Width * suggestedDpi.X / this._currentDpi.X;
this.Height = this.Height * suggestedDpi.Y / this._currentDpi.Y;
}
this._currentDpi = suggestedDpi;
}
public bool Equals(Dpi other)
{
return this.X == other.X && this.Y == other.Y;
}
