async private Task Render(IFeatureLayer layer)
{
IFeatureRenderer clonedFeatureRenderer = null;
ILabelRenderer clonedLabelRenderer = null;
GraphicsEngine.Abstraction.IBitmap compositionModeCopyBitmap = null;
GraphicsEngine.Abstraction.ICanvas compositionModeCopyCanvas = null, originalCanvas = null;
try
{
_map.FireOnUserInterface(true);
if ((
layer.FeatureRenderer == null ||
layer.FeatureRenderer.HasEffect(layer, _map) == false)
&&
(
layer.LabelRenderer == null ||
_useLabelRenderer == false
))
{
return;
}
IFeatureClass fClass = layer.FeatureClass;
if (fClass == null)
{
return;
}
//IDataset dataset = (IDataset)_map[layer];
//if (dataset == null) return;
//if (!(dataset is IFeatureDataset)) return;
IGeometry filterGeom = _map.Display.DisplayTransformation.TransformedBounds(_map.Display); //_map.Display.Envelope;
if (_map.Display.GeometricTransformer != null)
{
filterGeom = MapHelper.Project(fClass, _map.Display);
}
gView.Framework.Data.SpatialFilter filter = new gView.Framework.Data.SpatialFilter();
filter.DatasetCachingContext = _datasetCachingContext;
filter.Geometry = filterGeom;
filter.AddField(fClass.ShapeFieldName);
//filter.FuzzyQuery = true;
filter.SpatialRelation = spatialRelation.SpatialRelationMapEnvelopeIntersects;
filter.MapScale = _map.Display.mapScale;
filter.CancelTracker = _cancelTracker;
if (layer.FilterQuery != null)
{
filter.WhereClause = layer.FilterQuery.WhereClause;
if (layer.FilterQuery is IBufferQueryFilter)
{
ISpatialFilter sFilter = await BufferQueryFilter.ConvertToSpatialFilter(layer.FilterQuery as IBufferQueryFilter);
if (sFilter == null)
{
return;
}
filter.SpatialRelation = spatialRelation.SpatialRelationIntersects;
filter.Geometry = sFilter.Geometry;
}
if (layer.FilterQuery is ISpatialFilter)
{
//filter.FuzzyQuery = ((ISpatialFilter)layer.FilterQuery).FuzzyQuery;
filter.SpatialRelation = ((ISpatialFilter)layer.FilterQuery).SpatialRelation;
filter.Geometry = ((ISpatialFilter)layer.FilterQuery).Geometry;
}
}
// Erst nach dem Clonen anwenden!!!
//if (layer.FeatureRenderer != null && layer.FeatureRenderer.HasEffect(layer, _map))
//{
// layer.FeatureRenderer.PrepareQueryFilter(layer, filter);
//}
//if (layer.LabelRenderer != null && _useLabelRenderer)
//{
// layer.LabelRenderer.PrepareQueryFilter(_map.Display, layer, filter);
//}
IDisplay display = _map;
double refScale = display.refScale;
#region Layer Clonen
IFeatureRenderer renderer = null;
ILabelRenderer labelRenderer = null;
lock (lockThis)
{
// Beim Clonen sprerren...
// Da sonst bei der Servicemap bei gleichzeitigen Requests
// Exception "Objekt wird bereits an anderer Stelle verwendet" auftreten kann!
if (layer.FeatureRenderer != null && layer.FeatureRenderer.HasEffect(layer, _map))
{
if (layer.RequiresFeatureRendererClone(display))
{
renderer = clonedFeatureRenderer = (IFeatureRenderer)layer.FeatureRenderer.Clone(
new CloneOptions(display,
layer.UseWithRefScale(display),
maxRefScaleFactor: layer.MaxRefScaleFactor));
}
else
{
renderer = layer.FeatureRenderer;
}
}
if (layer.LabelRenderer != null && _useLabelRenderer)
{
if (layer.RequiresLabelRendererClone(display))
{
labelRenderer = clonedLabelRenderer =
(ILabelRenderer)layer.LabelRenderer.Clone(new CloneOptions(display,
layer.UseLabelsWithRefScale(display),
maxLabelRefscaleFactor: layer.MaxLabelRefScaleFactor));
}
else // Clone with null => simple clone
{
//display.refScale = 0;
labelRenderer = clonedLabelRenderer = (ILabelRenderer)layer.LabelRenderer.Clone(null);
//display.refScale = refScale;
}
}
}
#endregion
#region Prepare filter
// Prepare erst auf geclonte renderer anwenden!! (Threadsafe)
if (renderer != null && renderer.HasEffect(layer, _map))
{
renderer.PrepareQueryFilter(layer, filter);
}
if (labelRenderer != null && _useLabelRenderer)
{
labelRenderer.PrepareQueryFilter(_map.Display, layer, filter);
}
#endregion
using (IFeatureCursor fCursor = await fClass.GetFeatures(MapHelper.MapQueryFilter(filter)))
{
_map.FireOnUserInterface(false);
if (fCursor != null)
{
IFeature feature;
if (renderer != null)
{
renderer.StartDrawing(_map);
bool useCompostionModeCopy = layer is IFeatureLayerComposition &&
((IFeatureLayerComposition)layer).CompositionMode == FeatureLayerCompositionMode.Copy;
if (useCompostionModeCopy)
{
originalCanvas = _map.Display.Canvas;
compositionModeCopyBitmap = GraphicsEngine.Current.Engine.CreateBitmap(_map.Display.Bitmap.Width, _map.Display.Bitmap.Height, GraphicsEngine.PixelFormat.Rgba32);
compositionModeCopyCanvas = compositionModeCopyBitmap.CreateCanvas();
compositionModeCopyBitmap.MakeTransparent();
compositionModeCopyBitmap.SetResolution(_map.Display.Bitmap.DpiX,
_map.Display.Bitmap.DpiY);
((Display)_map.Display).Canvas = compositionModeCopyCanvas;
}
while ((feature = await fCursor.NextFeature()) != null)
{
if (_cancelTracker != null)
{
if (!_cancelTracker.Continue)
{
break;
}
}
renderer.Draw(_map, feature);
if (labelRenderer != null)
{
labelRenderer.Draw(_map, feature);
}
_counter.Counter++;
if (_isServiceMap == false)
{
if (_counter.Counter % 100 == 0)
{
_map.FireRefreshMapView();
}
}
}
}
else if (labelRenderer != null && _cancelTracker.Continue)
{
while ((feature = await fCursor.NextFeature()) != null)
{
if (_cancelTracker != null)
{
if (!_cancelTracker.Continue)
{
break;
}
}
labelRenderer.Draw(_map, feature);
_counter.Counter++;
}
}
if (labelRenderer != null)
{
labelRenderer.Release();
}
if (renderer != null)
{
renderer.FinishDrawing(_map, _cancelTracker);
}
if (compositionModeCopyCanvas != null && compositionModeCopyBitmap != null)
{
originalCanvas.DrawBitmap(compositionModeCopyBitmap,
new GraphicsEngine.CanvasRectangle(0, 0, compositionModeCopyBitmap.Width, compositionModeCopyBitmap.Height),
new GraphicsEngine.CanvasRectangle(0, 0, compositionModeCopyBitmap.Width, compositionModeCopyBitmap.Height),
opacity: (float)Math.Min(1, (100f - ((IFeatureLayerComposition)layer).CompositionModeCopyTransparency) / 100));
}
}
else
{
if (fClass is IDebugging && ((IDebugging)fClass).LastException != null)
{
throw ((IDebugging)fClass).LastException;
}
throw new Exception("Can't query feature class. Unknown error");
}
}
}
catch (Exception ex)
{
if (_map is IServiceMap && ((IServiceMap)_map).MapServer != null)
{
await((IServiceMap)_map).MapServer.LogAsync(
((IServiceMap)_map).Name,
"RenderFeatureLayer: " + ((layer != null) ? layer.Title : String.Empty),
loggingMethod.error,
ex.Message + "\n" + ex.Source + "\n" + ex.StackTrace);
}
if (_map != null)
{
_map.AddRequestException(new Exception("RenderFeatureLayerThread: " + ((layer != null) ? layer.Title : String.Empty) + "\n" + ex.Message, ex));
}
}
finally
{
if (clonedFeatureRenderer != null)
{
clonedFeatureRenderer.Release();
}
if (clonedLabelRenderer != null)
{
clonedLabelRenderer.Release();
}
if (originalCanvas != null)
{
((Display)_map.Display).Canvas = originalCanvas;
}
if (compositionModeCopyCanvas != null)
{
compositionModeCopyCanvas.Dispose();
compositionModeCopyCanvas = null;
}
if (compositionModeCopyBitmap != null)
{
compositionModeCopyBitmap.Dispose();
compositionModeCopyBitmap = null;
}
_map.FireOnUserInterface(false);
}
}