vtkMRMLVolumeRenderingWindowLevelWidget.h

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/*==============================================================================
 
  Program: 3D Slicer
 
  Copyright (c) Kitware Inc.
 
  See COPYRIGHT.txt
  or http://www.slicer.org/copyright/copyright.txt for details.
 
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 
==============================================================================*/

 
#ifndef vtkMRMLVolumeRenderingWindowLevelWidget_h
#define vtkMRMLVolumeRenderingWindowLevelWidget_h
 
#include "vtkSlicerVolumeRenderingModuleMRMLDisplayableManagerExport.h"
#include "vtkMRMLAbstractWidget.h"
 
// VTK includes
#include <vtkCallbackCommand.h>
#include <vtkSmartPointer.h>
#include <vtkWeakPointer.h>
 
class vtkMRMLViewNode;
class vtkMRMLVolumeRenderingDisplayNode;
class vtkMRMLVolumeRenderingDisplayableManager;
class vtkMRMLVolumePropertyNode;
class vtkPiecewiseFunction;
class vtkColorTransferFunction;
 
class VTK_SLICER_VOLUMERENDERING_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT vtkMRMLVolumeRenderingWindowLevelWidget : public vtkMRMLAbstractWidget
{
public:
  static vtkMRMLVolumeRenderingWindowLevelWidget* New();
  vtkTypeMacro(vtkMRMLVolumeRenderingWindowLevelWidget, vtkMRMLAbstractWidget);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void SetMRMLViewNode(vtkMRMLViewNode* viewNode);

  void SetVolumeRenderingDisplayableManager(vtkMRMLVolumeRenderingDisplayableManager* manager);

  bool CanProcessInteractionEvent(vtkMRMLInteractionEventData* eventData, double& distance2) override;

  bool ProcessInteractionEvent(vtkMRMLInteractionEventData* eventData) override;

  void Leave(vtkMRMLInteractionEventData* eventData) override;

  enum
  {
    WidgetStateWindowLevelAdjust = WidgetStateUser, // Normal window/level adjustment mode
    WidgetStateOpacityAdjust,                       // Ctrl+drag opacity adjustment mode
  };

  enum
  {
    WidgetEventClickAndDragStart = WidgetEventUser,
    WidgetEventClickAndDragEnd,
  };
 
protected:
  vtkMRMLVolumeRenderingWindowLevelWidget();
  ~vtkMRMLVolumeRenderingWindowLevelWidget() override;
 
  bool ProcessStartMouseDrag(vtkMRMLInteractionEventData* eventData);
  bool ProcessMouseMove(vtkMRMLInteractionEventData* eventData);
  bool ProcessEndMouseDrag(vtkMRMLInteractionEventData* eventData);
  bool ProcessReset(vtkMRMLInteractionEventData* eventData);
 
  bool ProcessAdjustTransferFunctionStart(vtkMRMLInteractionEventData* eventData);
  void ProcessAdjustTransferFunction(vtkMRMLInteractionEventData* eventData);

  void AdjustVolumeRenderingTransferFunctions(vtkMRMLVolumePropertyNode* volumePropertyNode, double deltaX, double deltaY, int modifiers = 0);
 
private:
  vtkMRMLVolumeRenderingWindowLevelWidget(const vtkMRMLVolumeRenderingWindowLevelWidget&) = delete;
  void operator=(const vtkMRMLVolumeRenderingWindowLevelWidget&) = delete;
 
  int StartEventPosition[2];
  int PreviousEventPosition[2];
 
  class vtkInternal;
  vtkInternal* Internal;
};
 
#endif