// Enumerate the drawings in the DrawingGroup.
private void EnumDrawingGroup(DrawingGroup drawingGroup)
{
// Enumerate the drawings in the DrawingCollection.
foreach (Drawing drawing in drawingGroup.Children)
{
string objectId = SvgObject.GetId(drawing);
if (!string.IsNullOrWhiteSpace(objectId))
{
_idMap[objectId] = drawing;
}
string objectName = (string)drawing.GetValue(FrameworkElement.NameProperty);
if (!string.IsNullOrWhiteSpace(objectName))
{
_idMap[objectName] = drawing;
}
string uniqueId = SvgObject.GetUniqueId(drawing);
if (!string.IsNullOrWhiteSpace(uniqueId))
{
_guidMap[uniqueId] = drawing;
}
DrawingGroup groupDrawing = null;
// If the drawing is a DrawingGroup, call the function recursively.
if (TryCast.Cast(drawing, out groupDrawing))
{
SvgObjectType objectType = SvgObject.GetType(groupDrawing);
if (objectType != SvgObjectType.Text)
{
EnumDrawingGroup(groupDrawing);
}
}
}
}
private Drawing PerformHitTest(Point pt)
{
if (_svgDrawing == null)
{
return(null);
}
_hitGroup = null;
if (_hitList == null)
{
_hitList = new SortedList <int, Drawing>();
_hitPaths = new SortedList <int, WpfHitPath>();
}
else if (_hitList.Count != 0)
{
_hitList.Clear();
_hitPaths.Clear();
}
var hitRootPath = new WpfHitPath();
_hitPath = hitRootPath;
Point ptDisplay = _displayTransform.Transform(pt);
DrawingGroup groupDrawing = null;
GlyphRunDrawing glyRunDrawing = null;
GeometryDrawing geometryDrawing = null;
Drawing foundDrawing = null;
//var isFound = false;
//var drawingLayer = this.GetDrawingLayer(_svgDrawing, ref isFound);
//System.Diagnostics.Trace.WriteLine("GetId: " + SvgObject.GetId(drawingLayer));
//System.Diagnostics.Trace.WriteLine("GetName: " + SvgObject.GetName(drawingLayer));
//System.Diagnostics.Trace.WriteLine("GetUniqueId: " + SvgObject.GetUniqueId(drawingLayer));
//DrawingCollection drawings = drawingLayer.Children;
DrawingCollection drawings = _svgDrawing.Children;
for (int i = drawings.Count - 1; i >= 0; i--)
{
Drawing drawing = drawings[i];
System.Diagnostics.Trace.WriteLine("GetId: " + SvgObject.GetId(drawing));
System.Diagnostics.Trace.WriteLine("GetName: " + SvgObject.GetName(drawing));
System.Diagnostics.Trace.WriteLine("GetUniqueId: " + SvgObject.GetUniqueId(drawing));
if (TryCast.Cast(drawing, out geometryDrawing))
{
if (HitTestDrawing(geometryDrawing, ptDisplay))
{
// _hitPath = _hitPath.AddChild(SvgObject.GetUniqueId(geometryDrawing));
int orderNumber = SvgObject.GetOrder(drawing);
if (orderNumber >= 0)
{
_hitList[orderNumber] = drawing;
_hitPaths[orderNumber] = _hitPath.AddChild(SvgObject.GetUniqueId(geometryDrawing));
}
else
{
string uniqueId = SvgObject.GetUniqueId(geometryDrawing);
if (!string.IsNullOrWhiteSpace(uniqueId))
{
foundDrawing = drawing;
break;
}
}
}
}
else if (TryCast.Cast(drawing, out groupDrawing))
{
//var ptSaved = ptDisplay;
//var transform = groupDrawing.Transform;
//if (transform != null && !transform.Value.IsIdentity)
//{
// ptDisplay = transform.Inverse.Transform(ptDisplay);
//}
_hitPath = hitRootPath.AddChild(SvgObject.GetUniqueId(groupDrawing));
int orderNumber = SvgObject.GetOrder(groupDrawing);
//if (SvgObject.GetType(groupDrawing) == SvgObjectType.Text &&
// groupDrawing.Bounds.Contains(ptDisplay))
if (SvgObject.GetType(groupDrawing) == SvgObjectType.Text &&
this.HitTestText(groupDrawing, ptDisplay, out foundDrawing))
{
if (orderNumber >= 0)
{
_hitList[orderNumber] = drawing;
_hitPaths[orderNumber] = _hitPath;
}
else
{
foundDrawing = drawing;
break;
}
}
else
{
// _hitPath = _hitPath.AddChild(SvgObject.GetUniqueId(groupDrawing));
var currentPath = _hitPath;
try
{
if (HitTestDrawing(groupDrawing, ptDisplay, out foundDrawing))
{
if (orderNumber >= 0)
{
_hitList[orderNumber] = drawing;
_hitPaths[orderNumber] = _hitPath.AddChild(SvgObject.GetUniqueId(foundDrawing));
}
else
{
string uniqueId = SvgObject.GetUniqueId(foundDrawing);
if (!string.IsNullOrWhiteSpace(uniqueId))
{
//foundDrawing = drawing;
break;
}
}
}
}
finally
{
_hitPath = currentPath;
}
}
}
else if (TryCast.Cast(drawing, out glyRunDrawing))
{
if (HitTestDrawing(glyRunDrawing, ptDisplay))
{
// _hitPath = _hitPath.AddChild(SvgObject.GetUniqueId(glyRunDrawing));
int orderNumber = SvgObject.GetOrder(drawing);
if (orderNumber >= 0)
{
_hitList[orderNumber] = drawing;
_hitPaths[orderNumber] = _hitPath.AddChild(SvgObject.GetUniqueId(glyRunDrawing));
}
else
{
foundDrawing = drawing;
break;
}
}
}
}
if (_hitList.Count != 0)
{
var key = _hitList.LastOrDefault().Key;
if (_hitPaths.ContainsKey(key))
{
System.Diagnostics.Trace.WriteLine("Key Found: " + _hitPaths[key].Path);
}
return(_hitList.LastOrDefault().Value);
}
if (foundDrawing == null)
{
return(_hitGroup);
}
return(foundDrawing);
}