////////////////////////////////////////////////////////////////////////////////////////////
private void PerformRotate(double angle, Point?rotatePoint = null)
{
// Obtain the current map transformation
Matrix transformMatrix = Map.RenderTransform.Value;
// Rotate the map by the given angle around the specified position
rotatePoint = rotatePoint ?? MapContainer.TransformToVisual(Map).Transform(new Point(MapContainer.ActualWidth / 2, MapContainer.ActualHeight / 2));
transformMatrix.RotateAtPrepend(angle, rotatePoint.Value.X, rotatePoint.Value.Y);
// Update the transform for the map
Map.RenderTransform = new MatrixTransform(transformMatrix);
TextRotateTransform.Angle -= angle;
NotifyPropertyChanged(nameof(TextRotateTransform));
}
////////////////////////////////////////////////////////////////////////////////////////////
private void PerformZoom(double scaleFactor, Point?zoomPoint = null)
{
// Obtain the current map transformation
Matrix transformMatrix = Map.RenderTransform.Value;
// Limit the scale to a specified maximum and minimum value
double currentScale = Math.Sqrt((transformMatrix.M11 * transformMatrix.M11) + (transformMatrix.M12 * transformMatrix.M12));
if (((scaleFactor > 1.0) && (currentScale >= _maxZoom)) || ((scaleFactor < 1.0) && (currentScale <= _minZoom)))
{
return;
}
// Scale the map transformation by the given factor at the specified position
zoomPoint = zoomPoint ?? MapContainer.TransformToVisual(Map).Transform(new Point(MapContainer.ActualWidth / 2, MapContainer.ActualHeight / 2));
transformMatrix.ScaleAtPrepend(scaleFactor, scaleFactor, zoomPoint.Value.X, zoomPoint.Value.Y);
// Update the transform for the map
Map.RenderTransform = new MatrixTransform(transformMatrix);
UpdateResizeControlTransforms();
}
