internal override void Draw(DrawParameter drawParameter)
{
if ((!ViewBounds.IsEmpty) && (base.IsVisible))
{
this.OnProgress(0);
this.GetImageSource(
delegate(ImageSource imgSrc)
{
this.GetSourceCompleted(imgSrc, drawParameter.UseTransitions, ++this.requestID);
}
);
}
}
internal override void Draw(DrawParameter drawParameter)
{
if ((base.IsInitialized && base.IsVisible) && (!ViewBounds.IsEmpty) && (base.Container != null))
{
if (GetCachedResolutions() != null)
{
realResolutions = this.GetCachedResolutions();
}
else
{
realResolutions = drawParameter.Resoluitons;
}
int[] span = this.GetTileSpanWithin(ViewBounds, Resolution);
if ((span[2] >= 0) || (span[3] >= 0))
{
AddTiles(Resolution, span[0], span[1], span[2], span[3], drawParameter.UseTransitions);
RemoveTiles(ViewBounds, Resolution);
base.OnProgress(this.GetProgress());
}
}
}
internal override void Draw(DrawParameter drawParameter)
{
if (base.Container != null)
{
Rectangle2D bounds = ViewBounds;
Rectangle2D biggerBounds = bounds;
double num = 20.0 * Resolution;
biggerBounds.Inflate(num, num);//上下左右扩张20个像素的距离
foreach (UIElement element in this.Children)
{
if (element == null)
{
return;
}
if (!(element.GetValue(BBoxProperty) is Rectangle2D))
{
throw new ArgumentException(ExceptionStrings.BboxIsNotSet);
}
Rectangle2D rect = GetBBox(element);
if (rect.IntersectsWith(biggerBounds) && !base.Container.Children.Contains(element))
{
if (element is ShapeElement)
{
ShapeElement sb = element as ShapeElement;
sb.SetPath();
sb.InvalidatePath(base.Container.Resolution, base.Container.OriginX, base.Container.OriginY);
ElementsLayer.SetBBox(sb, sb.ClippedBounds);
}
base.Container.Children.Add(element);
}
}
}
}
internal abstract void Draw(DrawParameter drawParameter);