private void ShowEraseDuringDrag(DragState state, MSet<LLShape> adorners, IEnumerable<Shape> eraseSet, List<PointT> simplified, bool cancel)
{
DiagramControl.EraseLineStyle.LineColor = Color.FromArgb(128, Control.BackColor);
var eraseLine = new LLPolyline(DiagramControl.EraseLineStyle, simplified);
adorners.Add(eraseLine);
if (cancel)
{
eraseLine.Style = Control.LineStyle;
Control.BeginRemoveAnimation(adorners);
adorners.Clear();
state.IsComplete = true;
}
else
{
// Show which shapes are erased by drawing them in the background color
foreach (Shape s in eraseSet)
{
Shape s_ = s.Clone();
s_.Style = (DiagramDrawStyle)s.Style.Clone();
s_.Style.FillColor = s_.Style.LineColor = s_.Style.TextColor = Color.FromArgb(192, Control.BackColor);
// avoid an outline artifact, in which color from the edges of the
// original shape bleeds through by a variable amount that depends
// on subpixel offsets.
s_.Style.LineWidth++;
s_.AddLLShapesTo(adorners);
}
}
}
private Shape DetectNewShapeDuringDrag(DragState state, MSet<LLShape> adorners, out bool potentialSelection)
