public override void Draw(BoundingBox boundingBox, sbyte zoomLevel, ICanvas canvas, Point topLeftPoint)
{
IList <TilePosition> tilePositions = LayerUtil.GetTilePositions(boundingBox, zoomLevel, topLeftPoint, this.displayModel.TileSize);
// In a rotation situation it is possible that drawParentTileBitmap sets the
// clipping bounds to portrait, while the device is just being rotated into
// landscape: the result is a partially painted screen that only goes away
// after zooming (which has the effect of resetting the clip bounds if drawParentTileBitmap
// is called again).
// Always resetting the clip bounds here seems to avoid the problem,
// I assume that this is a pretty cheap operation, otherwise it would be better
// to hook this into the onConfigurationChanged call chain.
canvas.ResetClip();
if (!isTransparent)
{
canvas.FillColor(this.displayModel.BackgroundColor);
}
ISet <Job> jobs = new HashSet <Job>();
foreach (TilePosition tilePosition in tilePositions)
{
jobs.Add(CreateJob(tilePosition.Tile));
}
this.tileCache.WorkingSet = jobs;
for (int i = tilePositions.Count - 1; i >= 0; --i)
{
TilePosition tilePosition = tilePositions[i];
Point point = tilePosition.Point;
Tile tile = tilePosition.Tile;
T job = CreateJob(tile);
ITileBitmap bitmap = this.tileCache.GetImmediately(job);
if (bitmap == null)
{
if (this.hasJobQueue && !this.tileCache.ContainsKey(job))
{
this.jobQueue.Add(job);
}
DrawParentTileBitmap(canvas, point, tile);
}
else
{
if (IsTileStale(tile, bitmap) && this.hasJobQueue && !this.tileCache.ContainsKey(job))
{
this.jobQueue.Add(job);
}
RetrieveLabelsOnly(job);
canvas.DrawBitmap(bitmap, (int)Math.Round(point.X), (int)Math.Round(point.Y));
bitmap.DecrementRefCount();
}
}
if (this.hasJobQueue)
{
this.jobQueue.NotifyWorkers();
}
}
public override void Draw(BoundingBox boundingBox, sbyte zoomLevel, ICanvas canvas, Point topLeftPoint)
{
IList <TilePosition> tilePositions = LayerUtil.GetTilePositions(boundingBox, zoomLevel, topLeftPoint, this.displayModel.TileSize);
for (int i = tilePositions.Count - 1; i >= 0; --i)
{
DrawTileCoordinates(tilePositions[i], canvas);
}
}