private void OnRotationMarkerRadioButtonChecked(object sender, RoutedEventArgs e)
{
if (!IsLoaded)
{
return;
}
if ((NoneRadioButton.IsChecked ?? false))
{
_standardMouseCameraController.ShowRotationCenterMarker = false;
return;
}
_standardMouseCameraController.ShowRotationCenterMarker = true;
CameraTargetPositionAdorner newCameraTargetPositionAdorner;
if (ChangedStandardRadioButton.IsChecked ?? false)
{
newCameraTargetPositionAdorner = _adjustedCameraTargetPositionAdorner;
}
else if (CustomRadioButton.IsChecked ?? false)
{
newCameraTargetPositionAdorner = _customCameraTargetPositionAdorner;
}
else // if (StandardRadioButton.IsChecked ?? false)
{
newCameraTargetPositionAdorner = new CameraTargetPositionAdorner(ViewportBorder); // Create a standard marker
}
// Set the RotationCenterAdorner for MouseCameraController
_standardMouseCameraController.RotationCenterAdorner = newCameraTargetPositionAdorner;
}
public CustomRotationMarker()
{
InitializeComponent();
_standardMouseCameraController = new MouseCameraController
{
TargetCamera = Camera1,
EventsSourceElement = ViewportBorder,
RotateCameraConditions = MouseCameraController.MouseAndKeyboardConditions.LeftMouseButtonPressed,
MoveCameraConditions = MouseCameraController.MouseAndKeyboardConditions.LeftMouseButtonPressed | MouseCameraController.MouseAndKeyboardConditions.ControlKey,
ShowRotationCenterMarker = true
};
RootGrid.Children.Add(_standardMouseCameraController);
// To change the setting that are used to create the standard rotation marker,
// we need to create a new instance of CameraTargetPositionAdorner and change its properties before the marker is shown.
_adjustedCameraTargetPositionAdorner = new CameraTargetPositionAdorner(ViewportBorder)
{
// Default values are commented:
//Radius = 15,
//InnerRadius = 11,
//MainCircleThickness = 2,
//OuterCircleThickness = 0.4,
//LinesLength = 10,
//MainBrush = Brushes.White,
//InnerBrush = new SolidColorBrush(Color.FromArgb(128, 128, 128, 128)), // 50% transparent gray
// Changed properties
Radius = 10,
InnerRadius = 8,
MainCircleThickness = 2,
OuterCircleThickness = 1,
LinesLength = 8,
MainBrush = Brushes.Yellow,
InnerBrush = new SolidColorBrush(Color.FromArgb(128, 255, 255, 128)) // 50% transparent yellow
};
// To provide custom rendering logic for rotation marker,
// we need to create a new class that is derived from CameraTargetPositionAdorner and override the OnRender method
_customCameraTargetPositionAdorner = new CustomCameraTargetPositionAdorner(ViewportBorder)
{
Radius = 18,
InnerRadius = 16,
LinesLength = 10,
OuterCircleThickness = 1.5,
};
_standardMouseCameraController.RotationCenterAdorner = _customCameraTargetPositionAdorner;
// NOTE:
// To show rotation marker, the ShowRotationCenterMarker property on MouseCameraController must be set to true (here this is done in XAML)
// Additional customization:
// It is possible to fully customize how the rotation marker is shown with creating a class that is derived from MouseCameraController
// and then override the ShowRotationAdorner(Point rotationCenterPosition) and HideRotationAdorner() methods.
// This way it would be possible to show an object in an overlay Canvas, a 3D axis or something else.
}