public void BeginPaint(Framework.Carto.IDisplay display, Framework.system.ICancelTracker cancelTracker)
{
if (!cancelTracker.Continue)
{
return;
}
//if (_thread.IsAlive)
// _thread.Join();
GetImage();
}
public IRasterLayerCursor ChildLayers(Framework.Carto.IDisplay display, string filterClause)
{
if (_dataset == null || _dataset.Extent == null || _dataset.Scales == null)
{
return(null);
}
// !!!! Only correct, if diplay unit is meter !!!!
double displayResolution = display.mapScale / (display.dpi / 0.0254);
Grid grid = new Grid(new Point(_dataset.Extent.minx, _dataset.Extent.maxx), _dataset.TileWidth, _dataset.TileHeight, display.dpi, _dataset.Origin);
for (int i = 0, to = _dataset.Scales.Length; i < to; i++)
{
grid.AddLevel(i, _dataset.Scales[i] / (display.dpi / 0.0254));
}
IEnvelope dispEnvelope = display.DisplayTransformation.TransformedBounds(display); //display.Envelope;
if (display.GeometricTransformer != null)
{
dispEnvelope = (IEnvelope)((IGeometry)display.GeometricTransformer.InvTransform2D(dispEnvelope)).Envelope;
}
int level = grid.GetBestLevel(displayResolution, 90D);
double res = grid.GetLevelResolution(level);
int col0 = grid.TileColumn(dispEnvelope.minx, res);
int row0 = grid.TileRow(dispEnvelope.maxy, res);
int col1 = grid.TileColumn(dispEnvelope.maxx, res);
int row1 = grid.TileRow(dispEnvelope.miny, res);
int col_from = Math.Max(0, Math.Min(col0, col1)), col_to = Math.Min((int)Math.Round(_dataset.Extent.Width / (_dataset.TileWidth * res), 0) - 1, Math.Max(col0, col1));
int row_from = Math.Max(0, Math.Min(row0, row1)), row_to = Math.Min((int)Math.Round(_dataset.Extent.Height / (_dataset.TileHeight * res), 0) - 1, Math.Max(row0, row1));
LayerCursor cursor = new LayerCursor();
for (int r = row_from; r <= row_to; r++)
{
for (int c = col_from; c <= col_to; c++)
{
cursor.Layers.Add(
new RasterTile(_dataset, grid, level, r, c, res));
}
}
cursor.Layers.Sort(new TileSorter(dispEnvelope.Center));
return(cursor);
}
public Task <IRasterPaintContext> BeginPaint(Framework.Carto.IDisplay display, Framework.system.ICancelTracker cancelTracker)
{
return(Task.FromResult <IRasterPaintContext>(new RasterPaintContext(null)));
}
public void BeginPaint(Framework.Carto.IDisplay display, Framework.system.ICancelTracker cancelTracker)
{
}
