/// <summary>
/// Draws the contents of the queue.
/// </summary>
/// <param name="time">Time elapsed since the last call to <see cref="UltravioletContext.Draw(UltravioletTime)"/>.</param>
/// <param name="dc">The drawing context that describes the render state of the layout.</param>
public void Draw(UltravioletTime time, DrawingContext dc)
{
if (queue.Count == 0)
return;
position = null;
while (true)
{
position = (position == null) ? queue.First : position.Next;
next = position.Next;
var popup = position.Value;
dc.Reset(popup.View.Display);
popup.EnsureIsLoaded(true);
popup.Draw(time, dc);
if (position.Next == null)
break;
}
position = null;
next = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="OutOfBandRenderer"/> class.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
public OutOfBandRenderer(UltravioletContext uv)
: base(uv)
{
this.spriteBatch = SpriteBatch.Create();
this.drawingContext = new DrawingContext();
this.drawingContext.SpriteBatch = spriteBatch;
}
/// <inheritdoc/>
protected override void OnDrawing(UltravioletTime time, DrawingContext dc)
{
DrawBlank(dc, new RectangleD(-HalfBoxSize, -HalfBoxSize, FullBoxSize, FullBoxSize), Color.Red);
DrawBlank(dc, new RectangleD(AdornedElement.RenderSize.Width - HalfBoxSize, -HalfBoxSize, FullBoxSize, FullBoxSize), Color.Lime);
DrawBlank(dc, new RectangleD(-8, AdornedElement.RenderSize.Height - HalfBoxSize, FullBoxSize, FullBoxSize), Color.Blue);
DrawBlank(dc, new RectangleD(AdornedElement.RenderSize.Width - HalfBoxSize, AdornedElement.RenderSize.Height - HalfBoxSize, FullBoxSize, FullBoxSize), Color.Magenta);
base.OnDrawing(time, dc);
}
/// <summary>
/// Adjusts the viewport in preparation for 3D rendering.
/// </summary>
/// <param name="dc">The current drawing context.</param>
/// <returns>The previous viewport.</returns>
private Viewport AdjustViewportFor3D(DrawingContext dc)
{
dc.Flush();
var posDips = TransformToAncestor(View.LayoutRoot, Point2D.Zero);
var posPixs = (Vector2)Display.DipsToPixels(posDips);
var transform = dc.GlobalTransform;
Vector2.Transform(ref posPixs, ref transform, out posPixs);
var oldViewport = Ultraviolet.GetGraphics().GetViewport();
var newViewport = new Viewport((Int32)posPixs.X, (Int32)posPixs.Y,
(Int32)Display.DipsToPixels(ActualWidth), (Int32)Display.DipsToPixels(ActualHeight));
Ultraviolet.GetGraphics().SetViewport(newViewport);
return oldViewport;
}
/// <inheritdoc/>
protected override void DrawOverride(UltravioletTime time, DrawingContext dc)
{
DrawBlank(dc, Color.Black * 0.5f);
var viewport = AdjustViewportFor3D(dc);
var triangleRotation = TriangleRotation;
var triangleDistance = 5f - (TriangleZoom * 2.5f);
var triangleAspectRatio = (Single)(ActualWidth / ActualHeight);
var gfx = Ultraviolet.GetGraphics();
var effect = EnsureEffect();
effect.World = Matrix.CreateRotationY(TriangleRotation);
effect.View = Matrix.CreateLookAt(new Vector3(0, 0, triangleDistance), Vector3.Zero, Vector3.Up);
effect.Projection = Matrix.CreatePerspectiveFieldOfView((Single)(Math.PI / 4.0), triangleAspectRatio, 1f, 1000f);
effect.VertexColorEnabled = true;
foreach (var pass in effect.CurrentTechnique.Passes)
{
pass.Apply();
gfx.SetRasterizerState(RasterizerState.CullNone);
gfx.SetGeometryStream(EnsureGeometryStream());
gfx.DrawPrimitives(PrimitiveType.TriangleList, 0, 1);
}
gfx.SetViewport(viewport);
base.DrawOverride(time, dc);
}
/// <summary>
/// When overridden in a derived class, draws the element using the
/// specified <see cref="Graphics.Graphics2D.SpriteBatch"/> for a <see cref="FrameworkElement"/> derived class.
/// </summary>
/// <param name="time">Time elapsed since the last call to <see cref="UltravioletContext.Draw(UltravioletTime)"/>.</param>
/// <param name="dc">The drawing context that describes the render state of the layout.</param>
protected virtual void DrawOverride(UltravioletTime time, DrawingContext dc)
{
var children = VisualTreeHelper.GetChildrenCount(this);
for (int i = 0; i < children; i++)
{
var child = VisualTreeHelper.GetChildByZOrder(this, i) as UIElement;
if (child != null)
{
child.Draw(time, dc);
}
}
}
/// <inheritdoc/>
protected sealed override void DrawCore(UltravioletTime time, DrawingContext dc)
{
if (!LayoutUtil.IsDrawn(this))
return;
DrawOverride(time, dc);
}
