//when we check for inclusion we expand the box by slack
internal Geometry Hit(MsaglPoint p, double slack, EntityFilterDelegate filter)
{
if (filter != null && this.geometry != null)
{
if (filter(geometry.dObject) == false)
{
return(null);
}
}
if (left == null)
{
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
{
return(line);
}
return(null);
}
else if (Box.Contains(p))
{
return(geometry);
}
return(null);
}
else
{
return(null);
}
}
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter);
if (g != null)
{
return(g);
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter);
if (g != null)
{
return(g);
}
}
return(null);
}
//when we check for inclusion we expand the box by slack
internal Geometry Hit(P2 p, double slack, EntityFilterDelegate filter, List<Geometry> subgraphCandidates)
{
if (filter != null && geometry != null)
if (filter(geometry.dObject) == false)
return null;
if (left == null)
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth/2)
return line;
return null;
}
if (Box.Contains(p))
{
var subg = geometry.dObject.DrawingObject as Subgraph;
if (subg != null)
subgraphCandidates.Add(geometry);
else
return geometry;
}
return null;
}
else
return null;
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
{
return g;
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
return g;
}
return null;
}
//when we check for inclusion we expand the box by slack
internal Geometry Hit(MsaglPoint p, double slack, EntityFilterDelegate filter)
{
if (filter != null && this.geometry != null)
if (filter(geometry.dObject) == false)
return null;
if (left == null)
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
return line;
return null;
}
else if (Box.Contains(p))
return geometry;
return null;
}
else
return null;
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter);
if (g != null)
{
return g;
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter);
if (g != null)
return g;
}
return null;
}
//when we check for inclusion we expand the box by slack
internal Geometry Hit(P2 p, double slack, EntityFilterDelegate filter, List <Geometry> subgraphCandidates)
{
if (filter != null && geometry != null)
{
if (filter(geometry.dObject) == false)
{
return(null);
}
}
if (left == null)
{
if (Box.Contains(p, slack))
{
Line line = geometry as Line;
if (line != null)
{
if (Tessellator.DistToSegm(p, line.start, line.end) < slack + line.LineWidth / 2)
{
return(line);
}
return(null);
}
if (Box.Contains(p))
{
var subg = geometry.dObject.DrawingObject as Subgraph;
if (subg != null)
{
subgraphCandidates.Add(geometry);
}
else
{
return(geometry);
}
}
return(null);
}
else
{
return(null);
}
}
if (left.Box.Contains(p, slack))
{
Geometry g = left.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
{
return(g);
}
}
if (right.Box.Contains(p, slack))
{
Geometry g = right.Hit(p, slack, filter, subgraphCandidates);
if (g != null)
{
return(g);
}
}
return(null);
}
void UnconditionalHit(MouseEventArgs args, EntityFilterDelegate filter)
{
System.Drawing.Point point = args != null
? new System.Drawing.Point(args.X, args.Y)
: DrawingPanel.PointToClient(MousePosition);
object old = selectedDObject;
if (bBNode == null && DGraph != null)
bBNode = DGraph.BBNode;
if (bBNode != null) {
Geometry geometry = bBNode.Hit(ScreenToSource(point), GetHitSlack(), filter);
selectedDObject = geometry == null ? null : geometry.dObject;
if (old != selectedDObject) {
SetSelectedObject(selectedDObject);
if (ObjectUnderMouseCursorChanged != null) {
var changedArgs = new ObjectUnderMouseCursorChangedEventArgs((IViewerObject) old,
selectedDObject);
ObjectUnderMouseCursorChanged(this, changedArgs);
}
}
}
}
