public void UpdatePosition()
{
PointCollection points = (Figure.Segments[0] as PolyLineSegment).Points;
Point prevPosition = points[PrevThumb.GetIndex()];
Point nextPosition = points[NextThumb.GetIndex()];
Canvas.SetLeft(this, (prevPosition.X + nextPosition.X) * 0.5 * scale);
Canvas.SetTop(this, (prevPosition.Y + nextPosition.Y) * 0.5 * scale);
}
public void InsertVertex(/*bool forceDrag = false*/)
{
if (PrevThumb != null && NextThumb != null)
{
int prevIndex = PrevThumb.GetIndex();
int nextIndex = NextThumb.GetIndex();
int newIndex = nextIndex > prevIndex ? nextIndex : prevIndex + 1; //Correct handling of closed curves
(Figure.Segments[0] as PolyLineSegment).Points.Insert(newIndex, new Point(Canvas.GetLeft(this) / Scale, Canvas.GetTop(this) / Scale));
MoveThumb moveThumb = new MoveThumb(ParentCanvas, Figure, newIndex, Scale, ThumbList /*, IsDragging || forceDrag*/);
ThumbList.Insert(newIndex, moveThumb);
moveThumb.PrevThumb = PrevThumb;
moveThumb.NextThumb = NextThumb;
PrevThumb.NextThumb = moveThumb;
NextThumb.PrevThumb = moveThumb;
prevIndex = PrevThumb.GetIndex();
nextIndex = NextThumb.GetIndex();
//DependencyObject p = LogicalTreeHelper.GetParent(this);
//MapCanvas parent = (MapCanvas)VisualTreeHelper.GetParent(this);
//MapCanvas parent = ((MapCanvas)Parent);
InsertThumb prevInsertThumb = new InsertThumb(ParentCanvas, Figure, prevIndex, newIndex, Scale, ThumbList);
prevInsertThumb.PrevThumb = PrevThumb;
prevInsertThumb.NextThumb = moveThumb;
moveThumb.PrevInsertThumb = prevInsertThumb;
PrevThumb.NextInsertThumb = prevInsertThumb;
ParentCanvas.Children.Add(prevInsertThumb);
InsertThumb nextInsertThumb = new InsertThumb(ParentCanvas, Figure, newIndex, nextIndex, Scale, ThumbList);
nextInsertThumb.PrevThumb = moveThumb;
nextInsertThumb.NextThumb = NextThumb;
moveThumb.NextInsertThumb = nextInsertThumb;
NextThumb.PrevInsertThumb = nextInsertThumb;
ParentCanvas.Children.Add(nextInsertThumb);
ParentCanvas.Children.Remove(this);
ParentCanvas.Children.Add(moveThumb);
}
}
public void DeleteVertex()
{
PointCollection points = (Figure.Segments[0] as PolyLineSegment).Points;
if (points.Count > 2)
{
int index = GetIndex();
points.RemoveAt(index);
ThumbList.RemoveAt(index);
if (index == 0)
{
Figure.StartPoint = points[0];
}
//MapCanvas parent = ((MapCanvas)Parent);
if (PrevThumb == null)
{
NextThumb.PrevThumb = null;
NextThumb.PrevInsertThumb = null;
}
else if (NextThumb == null)
{
PrevThumb.NextThumb = null;
PrevThumb.NextInsertThumb = null;
}
else
{
PrevThumb.NextThumb = NextThumb;
NextThumb.PrevThumb = PrevThumb;
InsertThumb newInsertThumb = new InsertThumb(ParentCanvas, Figure, PrevThumb.GetIndex(), NextThumb.GetIndex(), Scale, ThumbList);
newInsertThumb.PrevThumb = PrevThumb;
newInsertThumb.NextThumb = NextThumb;
PrevThumb.NextInsertThumb = newInsertThumb;
NextThumb.PrevInsertThumb = newInsertThumb;
ParentCanvas.Children.Add(newInsertThumb);
}
ParentCanvas.Children.Remove(this);
ParentCanvas.Children.Remove(PrevInsertThumb);
ParentCanvas.Children.Remove(NextInsertThumb);
}
}