public override bool Contains(TileIndex id)
{
// todo probably preload existing images into fileMap.
// todo probably save previous fileMaps.
if (id.Level != currentLevel)
{
fileMap = new Dictionary <TileIndex, bool>(new TileIndex.TileIndexEqualityComparer());
currentLevel = id.Level;
if (MapTileProvider.GetTotalTilesCount(currentLevel) <= maxIndicesToPrecache)
{
Stopwatch timer = Stopwatch.StartNew();
var directory = new DirectoryInfo(GetZoomDir(currentLevel));
if (directory.Exists)
{
var files = directory.GetFiles();
var fileNames = (from file in files
select file.Name).ToList();
fileNames.Sort();
var tileInfos = from tile in MapTileProvider.GetTilesForLevel(currentLevel)
let name = GetFileName(GetNameByIndex(tile))
orderby name
select new { Tile = tile, Name = name };
foreach (var tileInfo in tileInfos)
{
fileMap[tileInfo.Tile] = fileNames.Contains(tileInfo.Name);
}
MapsTraceSource.Instance.ServerInformationTraceSource
.TraceInformation($"Precached directory for level {currentLevel}: {timer.ElapsedMilliseconds} ms");
}
}
}
if (fileMap.ContainsKey(id))
{
return(fileMap[id]);
}
else
{
string path = GetImagePath(id);
bool res = File.Exists(path);
fileMap[id] = res;
return(res);
}
}
protected List <VisibleTileInfo> GetVisibleTiles()
{
var transform = plotter.Viewport.Transform;
Rect output = plotter.Viewport.Output;
DataRect visible = plotter.Viewport.Visible;
var tileInfos = (from tile in tileProvider.GetTilesForRegion(TransformRegion(visible), tileProvider.Level)
let visibleRect = Transform(tileProvider.GetTileBounds(tile))
let screenRect = visibleRect.ViewportToScreen(transform)
where output.IntersectsWith(screenRect)
select new VisibleTileInfo {
Tile = tile, ScreenBounds = screenRect, VisibleBounds = visibleRect
}).ToList();
if (tileInfos.Count > MapTileProvider.GetTotalTilesCount(tileProvider.Level))
{
//Debugger.Break();
}
return(tileInfos);
}
protected void OnRender()
{
if (DesignerProperties.GetIsInDesignMode(this))
{
return;
}
if (plotter == null)
{
return;
}
panel.Children.Clear();
freeChildren = new List <MapElement>(panel.Children.Count);
for (int i = 0; i < panel.Children.Count; i++)
{
freeChildren.Add((MapElement)panel.Children[i]);
}
rendering = true;
invalidatePending = false;
var transform = plotter.Viewport.Transform;
Rect output = plotter.Viewport.Output;
DataRect visible = plotter.Viewport.Visible;
visibleBounds = visible;
drawnBounds = DataRect.Empty;
var tileInfos = GetVisibleTiles();
var lowerTilesList = GetLoadedLowerTiles(tileInfos);
// displaying lower tiles
foreach (var tile in lowerTilesList)
{
if (server.IsLoaded(tile))
{
var bmp = server[tile];
DataRect visibleRect = tileProvider.GetTileBounds(tile);
DrawImage(bmp, visibleRect, tile);
}
else
{
server.BeginLoadImage(tile);
}
}
int count = 0;
foreach (var tileInfo in tileInfos)
{
drawnBounds.Union(tileInfo.VisibleBounds);
count++;
if (server.IsLoaded(tileInfo.Tile))
{
var bmp = server[tileInfo.Tile];
DrawImage(bmp, tileInfo.VisibleBounds, tileInfo.Tile);
}
else
{
server.BeginLoadImage(tileInfo.Tile);
}
}
showsWholeMap = count == MapTileProvider.GetTotalTilesCount(tileProvider.Level);
foreach (var item in freeChildren)
{
panel.Children.Remove(item);
pool.Put(item);
}
foreach (MapElement item in panel.Children)
{
if (item.Bitmap == null)
{
panel.Children.Remove(item);
pool.Put(item);
}
}
rendering = false;
Debug.WriteLine("Drawn " + Environment.TickCount);
}
