public IVisualRenderElement GetRenderElement(IRenderElementFactory factory)
{
if (visualRenderElement == null)
{
renderElementFactory = factory;
visualRenderElement = factory.CreateVisualRenderElement(this);
visualRenderElement.Background = VisualBackground;
visualRenderElement.Bounds = VisualBounds;
visualRenderElement.Clip = VisualClip;
visualRenderElement.ClipToBounds = VisualClipToBounds;
visualRenderElement.IsHitTestVisible = VisualIsHitTestVisible;
visualRenderElement.IsVisible = VisualIsVisible;
visualRenderElement.Opacity = VisualOpacity;
visualRenderElement.Transform = VisualTransform;
object content = CreateRenderElementContentOverride(factory);
if (content != null)
{
renderChildrenOffset = 1;
visualRenderElement.InsertChild(0, content);
}
int index = 0;
foreach (Visual child in VisualChildren)
{
child.GetRenderElement(factory);
visualRenderElement.InsertChild(renderChildrenOffset + index, child.GetRenderElement(factory));
index++;
}
}
return(visualRenderElement);
}
private IVisualRenderElement CreateRenderElement(IRenderElementFactory factory)
{
IVisualRenderElement visualRenderElement = factory.CreateVisualRenderElement(this);
visualRenderElement.Background = VisualBackground;
visualRenderElement.Bounds = VisualBounds;
visualRenderElement.ClipToBounds = VisualClipToBounds;
visualRenderElement.IsHitTestVisible = VisualIsHitTestVisible;
visualRenderElement.IsVisible = VisualIsVisible;
visualRenderElement.Opacity = VisualOpacity;
visualRenderElement.Transform = VisualTransform;
visualRenderElement.Content = CreateRenderElementContentOverride(factory);
int index = 0;
foreach (Visual child in VisualChildren)
{
child.GetRenderElement(factory);
visualRenderElement.InsertChild(index, child.GetRenderElement(factory));
index++;
}
return(visualRenderElement);
}
public void BorderRenderTest()
{
Brush backgroundBrush = new LinearGradientBrush(30, Colors.Blue, Colors.Green);
Brush borderBrush = new LinearGradientBrush(-30, Colors.Red, Colors.Blue);
Thickness borderThickness = new Thickness(10, 20, 30, 40);
Border border = new Border
{
Child = new FrameworkElement {
Width = 200, Height = 100
},
Background = backgroundBrush,
BorderBrush = borderBrush,
BorderThickness = borderThickness,
};
border.Measure(Size.Infinity);
border.Arrange(new Rect(border.DesiredSize));
IRenderElementFactory factory = TestRenderElementFactory.Default;
IVisualRenderElement visualRenderElement = border.GetRenderElement(factory);
Assert.AreEqual(new Rect(240, 160), visualRenderElement.Bounds);
Assert.AreEqual(1, visualRenderElement.Children.Count());
IBorderRenderElement borderRenderElement = visualRenderElement.Content as IBorderRenderElement;
Assert.IsNotNull(borderRenderElement);
Assert.AreEqual(backgroundBrush, borderRenderElement.Background);
Assert.AreEqual(borderBrush, borderRenderElement.BorderBrush);
Assert.AreEqual(borderThickness, borderRenderElement.BorderThickness);
Assert.AreEqual(new Rect(240, 160), borderRenderElement.Bounds);
IVisualRenderElement childVisualRenderElement = visualRenderElement.Children.Single() as IVisualRenderElement;
Assert.IsNotNull(childVisualRenderElement);
Assert.AreEqual(new Rect(10, 20, 200, 100), childVisualRenderElement.Bounds);
border.Child = null;
Assert.AreEqual(0, visualRenderElement.Children.Count());
}
