/// <summary>
/// Rotates the strokes to the same angle as outline.
/// </summary>
void rotateHandle_DragCompleted(object sender,
DragCompletedEventArgs e)
{
if (rotation == null)
{
return;
}
// Rotate the strokes to match the new angle.
Matrix mat = new Matrix();
mat.RotateAt(rotation.Angle - lastAngle, center.X, center.Y);
AdornedStrokes.Transform(mat, true);
// Save the angle of the last rotation.
lastAngle = rotation.Angle;
// Redraw rotateHandle.
this.InvalidateArrange();
}
public RotatingStrokesAdorner(UIElement adornedElement)
: base(adornedElement)
{
visualChildren = new VisualCollection(this);
rotateHandle = new Thumb();
rotateHandle.Cursor = Cursors.SizeNWSE;
rotateHandle.Width = 20;
rotateHandle.Height = 20;
rotateHandle.Background = Brushes.Blue;
rotateHandle.DragDelta += new DragDeltaEventHandler(rotateHandle_DragDelta);
rotateHandle.DragCompleted += new DragCompletedEventHandler(rotateHandle_DragCompleted);
outline = new Path();
outline.Stroke = Brushes.Blue;
outline.StrokeThickness = 1;
visualChildren.Add(outline);
visualChildren.Add(rotateHandle);
strokeBounds = AdornedStrokes.GetBounds();
}
