private void ClearShape(object param)
{
this.Items.Clear();
_points.Clear();
_lastLine = null;
_closeLine = null;
ClosedShape = false;
}
private void CloseShape()
{
var firstPoint = _points[0];
_lastLine.X2 = firstPoint.X;
_lastLine.Y2 = firstPoint.Y;
this.Items.Remove(_closeLine);
_closeLine = null;
_lastLine = null;
ClosedShape = true;
}
internal bool NotifyMouseClick(Point currentPoint)
{
if (ClosedShape)
{
return(false);
}
currentPoint = Snap.ToGrid(currentPoint);
if (_points.Count != 0)
{
// check if new point has same coordinations as last point
var lastPoint = _points.Last();
if (DoubleUtils.Equals(lastPoint, currentPoint))
{
return(true);
}
// check if new point has same coordinations as first pont
var firstPoint = _points[0];
if (DoubleUtils.Equals(firstPoint, currentPoint))
{
CloseShape();
return(true);
}
}
_points.Add(currentPoint);
_lastLine = new LineViewModel(currentPoint.X, currentPoint.Y, _mousePosition.X, _mousePosition.Y);
this.Items.Add(_lastLine);
if (_closeLine == null && this.Items.Count == 2)
{
var firstPoint = _points[0];
_closeLine = new LineViewModel(_mousePosition.X, _mousePosition.Y, firstPoint.X, firstPoint.Y);
this.Items.Add(_closeLine);
}
return(true);
}