private void Element_MouseWheel(object sender, MouseWheelEventArgs e)
{
var magnifier = MagnifierManager.GetMagnifier(_element) as Magnifier;
if ((magnifier != null) && magnifier.IsUsingZoomOnMouseWheel)
{
if (e.Delta < 0)
{
var newValue = magnifier.ZoomFactor + magnifier.ZoomFactorOnMouseWheel;
#if VS2008
magnifier.ZoomFactor = newValue;
#else
magnifier.SetCurrentValue(Magnifier.ZoomFactorProperty, newValue);
#endif
}
else if (e.Delta > 0)
{
var newValue = (magnifier.ZoomFactor >= magnifier.ZoomFactorOnMouseWheel) ? magnifier.ZoomFactor - magnifier.ZoomFactorOnMouseWheel : 0d;
#if VS2008
magnifier.ZoomFactor = newValue;
#else
magnifier.SetCurrentValue(Magnifier.ZoomFactorProperty, newValue);
#endif
}
_adorner.UpdateViewBox();
}
}
private static void OnMagnifierChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
{
UIElement target = d as UIElement;
if( target == null )
throw new ArgumentException( "Magnifier can only be attached to a UIElement." );
MagnifierManager manager = new MagnifierManager();
manager.AttachToMagnifier( target, e.NewValue as Magnifier );
}
private void Element_MouseLeave(object sender, MouseEventArgs e)
{
var magnifier = MagnifierManager.GetMagnifier(_element) as Magnifier;
if ((magnifier != null) && magnifier.IsFrozen)
{
return;
}
HideAdorner();
}
private static void OnMagnifierChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
UIElement target = d as UIElement;
if (target == null)
{
throw new ArgumentException("Magnifier can only be attached to a UIElement.");
}
MagnifierManager manager = new MagnifierManager();
manager.AttachToMagnifier(target, e.NewValue as Magnifier);
}