internal override bool CheckBeforeDraw(UpdateParameter updateParameter)
{
if ((Map.MapManipulator == MapManipulator.None && Map.MapStatus == MapStatus.Still) ||
Map.MapStatus == MapStatus.PanCompleted ||
Map.MapStatus == MapStatus.ZoomCompleted)
{
return true;
}
else
{
return false;
}
}
internal override bool CheckBeforeDraw(UpdateParameter updateParameter)
{
if ((base.IsInitialized && base.IsVisible) && (base.Container != null))
{
if (Map.MapStatus == MapStatus.Zooming && (GetCachedResolutions() == null) &&
updateParameter.Resolutions == null)
{
return false;
}
return true;
}
return false;
}
internal override void Draw(UpdateParameter updateParameter)
{
base.Draw(updateParameter);
if ((base.IsInitialized && base.IsVisible) && (!Rectangle2D.IsNullOrEmpty(ViewBounds)) && (base.Container != null))
{
if (GetCachedResolutions() != null)
{
realResolutions = this.GetCachedResolutions();
}
else
{
realResolutions = updateParameter.Resolutions;
}
double resolution = MathUtil.GetNearest(updateParameter.Resolution,realResolutions,MinVisibleResolution,MaxVisibleResolution);
int[] span = this.GetTileSpanWithin(ViewBounds, resolution);
int level = -1;
needShowTiles = NeedShowTiles(resolution, span, updateParameter.UseTransitions, out level);
TileComparer comparer = new TileComparer();
List<Tile> needDownload = needShowTiles.Except<Tile>(_inContainer.Values, comparer).ToList();
if (needDownload.Count > 0)
{
_queueSystem.InputTiles(uniqueLayerId, needDownload);
}
}
}
internal override void Draw(UpdateParameter updateParameter)
{
if (base.Container != null)
{
Rectangle2D bounds = ViewBounds;
double num = 20.0 * Resolution;
Rectangle2D biggerBounds = bounds.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 override bool CheckBeforeDraw(UpdateParameter updateParameter)
{
if (Map.MapStatus == MapStatus.Zooming)
{
return false;
}
return true;
}
internal abstract void Draw(UpdateParameter updateParameter);
internal virtual bool CheckBeforeDraw(UpdateParameter updateParameter)
{
return true;
}
internal void Update (UpdateParameter updateParameter)
{
if (CheckBeforeDraw(updateParameter))
{
Resolution = updateParameter.Resolution;
ViewBounds = updateParameter.ViewBounds;
ViewSize = updateParameter.ViewSize;
LayerOrigin = updateParameter.LayerOrigin;
Draw(updateParameter);
}
}
internal override void Draw(UpdateParameter updateParameter)
{
base.Draw(updateParameter);
if ((!Rectangle2D.IsNullOrEmpty(ViewBounds)) && (base.IsVisible))
{
this.OnProgress(0);
//if (_timer.IsEnabled)
//{
// _timer.Stop();
//}
//_timer.Start();
ImageInfo image = new ImageInfo();
image.ViewBounds = this.ViewBounds;
StartDownloadImage(image);
}
}