/// <summary>
/// Draws the line.
/// </summary>
/// <param name="point">The first point.</param>
/// <param name="point2">The second point.</param>
/// <param name="shape">The shape to be used.</param>
protected void DrawLine(Point point, Point point2, Shape shape)
{
Size desiredSize;
Point ensurePoint;
Rect heightAndWidthRect;
Point positionedPoint = new Point(0, 0);
Point centerPoint = new Point(0, 0);
double height = 0, width = 0;
Path path = null;
Line line = null;
if (IsWithCap)
{
path = shape as Path;
}
else
{
line = shape as Line;
}
point.Y = (double.IsNaN(point.Y)) ? 0 : point.Y;
point.X = (double.IsNaN(point.X)) ? 0 : point.X;
point2.Y = (double.IsNaN(point2.Y)) ? 0 : point2.Y;
point2.X = (double.IsNaN(point2.X)) ? 0 : point2.X;
heightAndWidthRect = new Rect(point, point2);
ensurePoint = this.EnsurePoint(point, point2);
desiredSize = new Size(heightAndWidthRect.Width, heightAndWidthRect.Height);
positionedPoint = GetElementPosition(new Size(heightAndWidthRect.Width, heightAndWidthRect.Height), ensurePoint);
if (IsWithCap)
{
arrowLine.X1 = point.X;
arrowLine.Y1 = point.Y;
arrowLine.X2 = point2.X;
arrowLine.Y2 = point2.Y;
path.Data = arrowLine.GetGeometry() as PathGeometry;
}
else
{
line.X1 = point.X;
line.Y1 = point.Y;
line.X2 = point2.X;
line.Y2 = point2.Y;
}
if (CanResize && farThumb != null && nearThumb != null)
{
Canvas.SetLeft(farThumb, point.X);
Canvas.SetTop(farThumb, point.Y);
Canvas.SetLeft(nearThumb, point2.X);
Canvas.SetTop(nearThumb, point2.Y);
}
AnnotationElement.Width = heightAndWidthRect.Width;
AnnotationElement.Height = heightAndWidthRect.Height;
centerPoint = new Point(
positionedPoint.X + (heightAndWidthRect.Width / 2),
positionedPoint.Y + (heightAndWidthRect.Height / 2));
minimumSize = GrabExtent * 2;
height = heightAndWidthRect.Height < minimumSize ? minimumSize : heightAndWidthRect.Height;
width = heightAndWidthRect.Width < minimumSize ? minimumSize : heightAndWidthRect.Width;
RotatedRect = new Rect(centerPoint.X - (width / 2), centerPoint.Y - (height / 2), width, height);
LinePoints = new Point[2] {
point, point2
};
if (!(this is HorizontalLineAnnotation || this is VerticalLineAnnotation))
{
UpdateHitArea();
}
if (TextElement.Content != null)
{
SetTextElementPosition(point, point2, desiredSize, positionedPoint, TextElement);
}
// This is to avoid line visibility collapse while dragging.
if (LineCanvas != null && IsDragging)
{
LineCanvas.UpdateLayout();
}
}
