/// <summary>
/// Initializes the specified element and its descendants by hooking property bindings and events.
/// </summary>
/// <param name="element">The element.</param>
private void InitElement(SkiaFrameworkElement element)
{
if (!GetIsInitialized(element))
{
if (EnableBinding)
{
foreach (var bindingProperty in element.GetBindingProperties())
{
var container = BindingEventContainer.Generate(element, bindingProperty);
container.ValueChanged += OnBindingContainerValueChanged;
_containers.Add(container);
_bindingThrottlers.Add(container.BindingProperty, new ActionThrottle(TimeSpan.FromMilliseconds(1000d / BindingFPS), _host.Dispatcher));
}
}
element.ChildAdded += Element_ChildAdded;
element.ChildRemoved += Element_ChildRemoved;
SetIsInitialized(element, true);
}
foreach (var child in element.Children)
{
InitElement(child);
}
}
private static SkiaFrameworkElement LoadTreeInternal(FrameworkElement root)
{
SkiaFrameworkElement item = SkiaElementResolver.Default.CreateElementFor(root);
if (item != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(root); i++)
{
var element = VisualTreeHelper.GetChild(root, i) as FrameworkElement;
if (element != null)
{
var treeItem = LoadTreeInternal(element);
if (treeItem != null)
{
treeItem.Parent = item;
item.Children.Add(treeItem);
}
}
}
return(item);
}
return(null);
}
private List <SkiaFrameworkElement> Flatten(SkiaFrameworkElement element, List <SkiaFrameworkElement> list)
{
list.Add(element);
foreach (var item in element.Children)
{
Flatten(item, list);
}
return(list);
}
/// <summary>
/// Performs a rendering pass on the specified <see cref="SkiaFrameworkElement"/> and its descendants.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="mode">The mode.</param>
protected void RenderSingle(SkiaFrameworkElement element, BindingPropertyMode mode)
{
SkiaFrameworkElement toRender = element.Parent != null ? element.Parent : element;
var bounds = toRender.Bounds;
if (mode == BindingPropertyMode.AffectsLayout)
{
toRender.InvalidateBounds();
if (toRender.Bounds.Contains(bounds))
{
bounds = toRender.Bounds;
}
else
{
bounds.Width += 1;
bounds.Height += 1;
}
}
if (bounds.Left < Source.Width && bounds.Top < Source.Height)
{
Source.Lock();
T context = CreateDrawingContext();
context.BeginDrawing();
context.ClipRect(bounds, new CornerRadius());
context.Clear(Colors.Transparent);
SkiaTree.Root.Invalidate(context, bounds, 1);
context.EndDrawing();
if (bounds.Right > Source.Width)
{
bounds.Width = Source.Width - bounds.Left;
}
if (bounds.Bottom > Source.Height)
{
bounds.Height = Source.Height - bounds.Top;
}
OnRenderCompleted(Source.BackBuffer, (int)Source.Width, (int)Source.Height, (int)Source.Width * 4);
Source.AddDirtyRect(new Int32Rect((int)Math.Max(bounds.Left, 0), (int)Math.Max(bounds.Top, 0), (int)bounds.Width, (int)bounds.Height));
Source.Unlock();
}
}
/// <summary>
/// Generates a new <see cref="BindingEventContainer"/> for the specified Skia element and binding property.
/// </summary>
/// <param name="skiaElement">The skia element.</param>
/// <param name="bindingProperty">The binding property.</param>
/// <returns></returns>
public static BindingEventContainer Generate(SkiaFrameworkElement skiaElement, BindingProperty bindingProperty)
{
BindingEventContainer container = new BindingEventContainer(skiaElement, bindingProperty);
Binding binding = new Binding();
binding.Mode = BindingMode.OneWay;
binding.Source = skiaElement.WpfElement;
binding.Path = new PropertyPath(bindingProperty.DependencyProperty);
binding.IsAsync = true;
BindingOperations.SetBinding(container, BindingEventContainer.ValueProperty, binding);
return(container);
}
/// <summary>
/// Invalidates the specified element <see cref="Bounds"/>.
/// </summary>
/// <param name="parent">The parent.</param>
private void InvalidateBounds(SkiaFrameworkElement parent)
{
Bounds = GetBounds();
var bounds = Bounds;
if (parent != null)
{
bounds.Offset(parent.Bounds.Left, parent.Bounds.Top);
Bounds = bounds;
}
foreach (var child in Children)
{
child.InvalidateBounds(this);
}
}
/// <summary>
/// Creates a new instance of a <see cref="SkiaFrameworkElement"/> by looking for a proper registration of the specified <see cref="FrameworkElement"/> type.
/// When no registration was found, will return a default instance of <see cref="SkiaFrameworkElement"/>.
/// </summary>
/// <param name="element">The element.</param>
/// <returns></returns>
public SkiaFrameworkElement CreateElementFor(FrameworkElement element)
{
Type skiaType = null;
if (_binders.TryGetValue(element.GetType(), out skiaType))
{
SkiaFrameworkElement skiaElement = Activator.CreateInstance(skiaType) as SkiaFrameworkElement;
skiaElement.WpfElement = element;
return(skiaElement);
}
else
{
SkiaFrameworkElement defaultElement = Activator.CreateInstance(typeof(SkiaFrameworkElement)) as SkiaFrameworkElement;
defaultElement.WpfElement = element;
return(defaultElement);
}
}
private SkiaFrameworkElement Find(SkiaFrameworkElement element, Func <SkiaFrameworkElement, bool> predicate)
{
if (predicate(element))
{
return(element);
}
foreach (var item in element.Children)
{
var result = Find(item, predicate);
if (result != null)
{
return(result);
}
}
return(null);
}
/// <summary>
/// Creates a new <see cref="DrawingStyle"/> based on the specified <see cref="SkiaFrameworkElement"/>.
/// </summary>
/// <param name="element">The element.</param>
/// <returns></returns>
public static DrawingStyle FromElement(SkiaFrameworkElement element)
{
DrawingStyle style = new DrawingStyle();
style.EdgeMode = RenderOptions.GetEdgeMode(element);
style.Effect = element.WpfElement.Effect;
if (element.Parent != null && element.Parent.WpfElement.RenderTransform != Transform.Identity)
{
style.Transform = element.Parent.WpfElement.RenderTransform;
style.TransformOrigin = element.Parent.WpfElement.RenderTransformOrigin;
}
else
{
style.Transform = element.WpfElement.RenderTransform;
style.TransformOrigin = element.WpfElement.RenderTransformOrigin;
}
return(style);
}
/// <summary>
/// Initializes a new instance of the <see cref="BindingEventContainer"/> class.
/// </summary>
/// <param name="skiaElement">The skia element.</param>
/// <param name="bindingProperty">The binding property.</param>
public BindingEventContainer(SkiaFrameworkElement skiaElement, BindingProperty bindingProperty)
{
SkiaElement = skiaElement;
BindingProperty = bindingProperty;
}
/// <summary>
/// Disposes the specified element.
/// </summary>
/// <param name="element">The element.</param>
private void DisposeElement(SkiaFrameworkElement element)
{
element.ChildAdded -= Element_ChildAdded;
element.ChildRemoved -= Element_ChildRemoved;
}
public static bool GetIsInitialized(SkiaFrameworkElement element)
{
return((bool)element.GetValue(IsInitializedProperty));
}
public static void SetIsInitialized(SkiaFrameworkElement element, bool value)
{
element.SetValue(IsInitializedProperty, value);
}
/// <summary>
/// Initializes a new instance of the <see cref="SkiaTree"/> class.
/// </summary>
/// <param name="root">The root.</param>
public SkiaTree(SkiaFrameworkElement root)
{
Root = root;
}
