private void OnLoaded(object sender, RoutedEventArgs e)
{
//make the render effect same as SnapsToDevicePixels
//"SnapsToDevicePixels = true;" doesn't work on "OnRender"
//however, this maybe make some offset form the render target's origin location
//SetValue(RenderOptions.EdgeModeProperty, EdgeMode.Aliased);
//ini this
//Cursor = BitmapCursor.CreateCrossCursor();
Background = Brushes.Transparent;
//ini mask rect
maskRectLeft.Fill = maskRectRight.Fill = maskRectTop.Fill = maskRectBottom.Fill = Config.MaskWindowBackground;
//these propeties(x, y...) will not changed
SetLeft(maskRectLeft, 0);
SetTop(maskRectLeft, 0);
SetRight(maskRectRight, 0);
SetTop(maskRectRight, 0);
SetTop(maskRectTop, 0);
SetBottom(maskRectBottom, 0);
maskRectLeft.Height = ActualHeight;
Children.Add(maskRectLeft);
Children.Add(maskRectRight);
Children.Add(maskRectTop);
Children.Add(maskRectBottom);
//ini selection border
selectionBorder.Stroke = Config.SelectionBorderBrush;
selectionBorder.StrokeThickness = Config.SelectionBorderThickness.Left;
Children.Add(selectionBorder);
//ini indicator
indicator = new IndicatorObject(this);
Children.Add(indicator);
CompositionTarget.Rendering += OnCompositionTargetRendering;
}
protected override void OnVisualParentChanged(DependencyObject oldParent)
{
base.OnVisualParentChanged(oldParent);
Target = this.GetAncestor <IndicatorObject>();
}