public override void OnMouseDown(CanvasPanel canvasPanel, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
SelectedShape = GetClickedShape(canvasPanel, e);
if (this.SelectedShape != null)
{
canvasPanel.Cursor = Cursors.SizeAll;
_dragInfo = new DragInfo(e, SelectedShape.GetHandlerAt(e.Location));
}
}
canvasPanel.Refresh();
}
public override void OnMouseUp(CanvasPanel canvasPanel, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
canvasPanel.Cursor = this.Cursor;
_dragInfo = null;
}
else if (e.Button==MouseButtons.Right)
{
if (_selectedShape!=null)
{
if (_selectedShape.GetType() == typeof(Polygon))
{
var poly = (Polygon) SelectedShape;
int clickedHandler = _selectedShape.GetHandlerAt(e.Location);
if (clickedHandler > -1)
{
poly.RemoveVertex(clickedHandler);
}
else
{
poly.AddVertex(e.Location);
}
}
canvasPanel.Refresh();
}
}
}