/// <summary>
/// This will draw any features that intersect this region. To specify the features
/// directly, use OnDrawFeatures. This will not clear existing buffer content.
/// For that call Initialize instead.
/// </summary>
/// <param name="args">A GeoArgs clarifying the transformation from geographic to image space</param>
/// <param name="regions">The geographic regions to draw</param>
/// <returns>The list of rectangular areas that match the specified regions</returns>
public void DrawRegions(MapArgs args, List<IEnvelope> regions)
{
// First determine the number of features we are talking about based on region.
List<Rectangle> clipRects = args.ProjToPixel(regions);
if (EditMode)
{
List<IFeature> drawList = new List<IFeature>();
foreach (IEnvelope region in regions)
{
if (region != null)
{
// Use union to prevent duplicates. No sense in drawing more than we have to.
drawList = drawList.Union(DataSet.Select(region)).ToList();
}
}
DrawFeatures(args, drawList, clipRects, true);
}
else
{
List<int> drawList = new List<int>();
List<Extent> extents = new List<Extent>();
double[] verts = DataSet.Vertex;
foreach (IEnvelope envelope in regions)
{
extents.Add(new Extent(envelope));
}
if (DataSet.FeatureType == FeatureTypes.Point)
{
for(int shp = 0; shp < verts.Length/2; shp++)
{
foreach (Extent extent in extents)
{
if(extent.Intersects(verts[shp * 2], verts[shp * 2+ 1]))
{
drawList.Add(shp);
}
}
}
}
else
{
List<ShapeRange> shapes = DataSet.ShapeIndices;
for (int shp = 0; shp < shapes.Count; shp++)
{
foreach (IEnvelope region in regions)
{
if (!shapes[shp].Extent.Intersects(region)) continue;
drawList.Add(shp);
break;
}
}
}
DrawFeatures(args, drawList, clipRects, true);
}
}
/// <summary>
/// This will draw any features that intersect this region. To specify the features
/// directly, use OnDrawFeatures. This will not clear existing buffer content.
/// For that call Initialize instead.
/// </summary>
/// <param name="args">A GeoArgs clarifying the transformation from geographic to image space</param>
/// <param name="regions">The geographic regions to draw</param>
/// <returns>The list of rectangular areas that match the specified regions</returns>
public void DrawRegions(MapArgs args, List<IEnvelope> regions)
{
List<Rectangle> clipRects = args.ProjToPixel(regions);
DrawWindows(args, regions, clipRects);
}
/// <summary>
/// This will draw any features that intersect this region. To specify the features
/// directly, use OnDrawFeatures. This will not clear existing buffer content.
/// For that call Initialize instead.
/// </summary>
/// <param name="args">A GeoArgs clarifying the transformation from geographic to image space</param>
/// <param name="regions">The geographic regions to draw</param>
/// <returns>The list of rectangular areas that match the specified regions</returns>
public void DrawRegions(MapArgs args, List<IEnvelope> regions)
{
List<Rectangle> clipRects = args.ProjToPixel(regions);
if (EditMode)
{
List<IFeature> drawList = new List<IFeature>();
foreach (IEnvelope region in regions)
{
if (region != null)
{
// Use union to prevent duplicates. No sense in drawing more than we have to.
drawList = drawList.Union(DataSet.Select(region)).ToList();
}
}
DrawFeatures(args, drawList, clipRects, true);
}
else
{
List<int> drawList = new List<int>();
List<ShapeRange> shapes = DataSet.ShapeIndices;
for (int shp = 0; shp < shapes.Count; shp++)
{
foreach (IEnvelope region in regions)
{
if (!shapes[shp].Extent.Intersects(region)) continue;
drawList.Add(shp);
break;
}
}
DrawFeatures(args, drawList, clipRects, true);
}
}
/// <summary>
/// This will draw any features that intersect this region. To specify the features
/// directly, use OnDrawFeatures. This will not clear existing buffer content.
/// For that call Initialize instead.
/// </summary>
/// <param name="args">A GeoArgs clarifying the transformation from geographic to image space</param>
/// <param name="regions">The geographic regions to draw</param>
public void DrawRegions(MapArgs args, List<IEnvelope> regions)
{
if (FeatureSet == null) return;
if(FeatureSet.IndexMode)
{
// First determine the number of features we are talking about based on region.
List<int> drawIndices = new List<int>();
foreach (IEnvelope region in regions)
{
if (region != null)
{
// We need to consider labels that go off the screen. figure a region
// that is larger.
IEnvelope sur = new Envelope(region.Copy());
sur.ExpandBy(region.Width, region.Height);
Extent r = new Extent(sur);
// Use union to prevent duplicates. No sense in drawing more than we have to.
drawIndices = drawIndices.Union(FeatureSet.SelectIndices(r)).ToList();
}
}
List<Rectangle> clips = args.ProjToPixel(regions);
DrawFeatures(args, drawIndices, clips, true);
}
else
{
// First determine the number of features we are talking about based on region.
List<IFeature> drawList = new List<IFeature>();
foreach (IEnvelope region in regions)
{
if (region != null)
{
// We need to consider labels that go off the screen. figure a region
// that is larger.
IEnvelope r = region.Copy();
r.ExpandBy(region.Width, region.Height);
// Use union to prevent duplicates. No sense in drawing more than we have to.
drawList = drawList.Union(FeatureSet.Select(r)).ToList();
}
}
List<Rectangle> clipRects = args.ProjToPixel(regions);
DrawFeatures(args, drawList, clipRects, true);
}
}
/// <summary>
/// This will draw any features that intersect this region. To specify the features
/// directly, use OnDrawFeatures. This will not clear existing buffer content.
/// For that call Initialize instead.
/// </summary>
/// <param name="args">A GeoArgs clarifying the transformation from geographic to image space</param>
/// <param name="regions">The geographic regions to draw</param>
/// <returns>The list of rectangular areas that match the specified regions</returns>
public void DrawRegions(MapArgs args, List<IEnvelope> regions)
{
List<Rectangle> clipRects = args.ProjToPixel(regions);
for (int i = clipRects.Count-1; i >=0; i-- )
{
if (clipRects[i].Width != 0 && clipRects[i].Height != 0) continue;
regions.RemoveAt(i);
clipRects.RemoveAt(i);
}
DrawWindows(args, regions, clipRects);
}
