protected override void OnMouseDown(MouseButtonEventArgs args)
{
base.OnMouseDown(args);
if (args.Handled || _division == null)
{
return;
}
Point cursor = Mouse.GetPosition(OutputBox);
if (cursor.X < 0 || cursor.X >= OutputBox.Width ||
cursor.Y < 0 || cursor.Y >= OutputBox.Height)
{
return;
}
if (AddEdgeToggle.IsChecked == true)
{
if (_selectedVertex >= 0)
{
PointD oldVertex = _division.Vertices.GetKey(_selectedVertex);
_division.AddEdge(oldVertex, cursor.ToPointD());
}
}
else if (RemoveEdgeToggle.IsChecked == true)
{
if (_selectedEdge >= 0)
{
_division.RemoveEdge(_selectedEdge);
}
}
else if (SplitEdgeToggle.IsChecked == true)
{
if (_selectedEdge >= 0)
{
_division.SplitEdge(_selectedEdge);
}
}
else if (ConnectVertexToggle.IsChecked == true)
{
if (_selectedVertex >= 0)
{
PointD oldVertex = _division.Vertices.GetKey(_selectedVertex);
CollectionsUtility.AnyRandom(_division.Vertices.Keys,
p => (_division.AddEdge(oldVertex, p) != null));
}
}
else if (MoveVertexToggle.IsChecked == true)
{
if (_selectedVertex >= 0)
{
PointD newVertex = cursor.ToPointD();
_division.MoveVertex(_selectedVertex, newVertex);
}
}
else if (RemoveVertexToggle.IsChecked == true)
{
if (_selectedVertex >= 0)
{
_division.RemoveVertex(_selectedVertex);
}
}
else
{
return;
}
DrawSubdivision(_division);
SetNearestEdge(null, 0);
SetSelectedEdge(-1);
SetSelectedVertex(-1);
}