vtkMRMLWindowLevelWidget.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 vtkMRMLWindowLevelWidget_h
#define vtkMRMLWindowLevelWidget_h

#include "vtkMRMLDisplayableManagerExport.h" // For export macro
#include "vtkMRMLAbstractWidget.h"
#include "vtkMRMLSliceLogic.h"
#include "vtkMRMLSliceNode.h"

#include <vtkCallbackCommand.h>
#include <vtkCollection.h>
#include <vtkSmartPointer.h>
#include <vtkWeakPointer.h>

class vtkSliceIntersectionRepresentation2D;
class vtkMRMLApplicationLogic;
class vtkMRMLSegmentationDisplayNode;


class VTK_MRML_DISPLAYABLEMANAGER_EXPORT vtkMRMLWindowLevelWidget : public vtkMRMLAbstractWidget
{
public:
  static vtkMRMLWindowLevelWidget *New();

  enum
  {
    ModeAdjust,
    ModeRectangle,
    ModeRectangleCentered,
    Mode_Last
  };


  vtkTypeMacro(vtkMRMLWindowLevelWidget, vtkMRMLAbstractWidget);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void CreateDefaultRepresentation();

  void SetSliceNode(vtkMRMLSliceNode* sliceNode);
  vtkMRMLSliceNode* GetSliceNode();

  vtkMRMLSliceLogic* GetSliceLogic();

  vtkGetMacro(BackgroundVolumeEditable, bool);
  vtkSetMacro(BackgroundVolumeEditable, bool);
  vtkBooleanMacro(BackgroundVolumeEditable, bool);

  vtkGetMacro(ForegroundVolumeEditable, bool);
  vtkSetMacro(ForegroundVolumeEditable, bool);
  vtkBooleanMacro(ForegroundVolumeEditable, bool);

  void SetMRMLApplicationLogic(vtkMRMLApplicationLogic* applicationLogic) override;

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

  bool ProcessInteractionEvent(vtkMRMLInteractionEventData* eventData) override;

  void Leave(vtkMRMLInteractionEventData* eventData) override;

  enum
    {
    WidgetStateAdjustWindowLevel = WidgetStateUser,
    WidgetStateAdjustWindowLevelAlternative,
    };

  enum
    {
    WidgetEventResetWindowLevel = WidgetEventUser,
    WidgetEventAdjustWindowLevelStart,
    WidgetEventAdjustWindowLevelEnd,
    WidgetEventAdjustWindowLevelCancel,
    WidgetEventAdjustWindowLevelAlternativeStart,
    WidgetEventAdjustWindowLevelAlternativeEnd,
    WidgetEventAdjustWindowLevelAlternativeCancel,
    };

  bool UpdateWindowLevelFromRectangle(int layer, int cornerPoint1[2], int cornerPoint2[2]);

  static const char* GetInteractionNodeAdjustWindowLevelModeAttributeName() { return "AdjustWindowLevelMode"; };

  static const char* GetAdjustWindowLevelModeAsString(int id);
  static int GetAdjustWindowLevelModeFromString(const char* name);

protected:
  vtkMRMLWindowLevelWidget();
  ~vtkMRMLWindowLevelWidget() override;

  bool ProcessStartMouseDrag(vtkMRMLInteractionEventData* eventData);
  bool ProcessMouseMove(vtkMRMLInteractionEventData* eventData);
  bool ProcessEndMouseDrag(vtkMRMLInteractionEventData* eventData);

  bool ProcessAdjustWindowLevelStart(vtkMRMLInteractionEventData* eventData);
  void ProcessAdjustWindowLevel(vtkMRMLInteractionEventData* eventData);

  bool ProcessSetWindowLevelFromRegionStart(vtkMRMLInteractionEventData* eventData);
  void ProcessSetWindowLevelFromRegion(vtkMRMLInteractionEventData* eventData);
  // If updateWindowLevel is set to false then the operation is cancelled without changing the window/level
  bool ProcessSetWindowLevelFromRegionEnd(vtkMRMLInteractionEventData* eventData, bool updateWindowLevel=true);

  bool ProcessResetWindowLevel(vtkMRMLInteractionEventData* eventData);

  int GetEditableLayerAtEventPosition(vtkMRMLInteractionEventData* eventData);

  bool IsEventInsideVolume(bool background, vtkMRMLInteractionEventData* eventData);

  bool VolumeWindowLevelEditable(const char* volumeNodeID);

  vtkMRMLVolumeNode* GetVolumeNodeFromSliceLayer(int editedLayer);

  bool SetVolumeWindowLevel(double window, double level, bool isAutoWindowLevel);

  vtkGetMacro(CenteredRubberBand, bool);
  vtkSetMacro(CenteredRubberBand, bool);
  vtkBooleanMacro(CenteredRubberBand, bool);

  vtkWeakPointer<vtkMRMLSliceNode> SliceNode;
  vtkWeakPointer<vtkMRMLSliceLogic> SliceLogic;

  bool CenteredRubberBand;

  int StartEventPosition[2];
  int PreviousEventPosition[2];

  double VolumeScalarRange[2];

  // Auto window/level was active before starting to adjust it
  bool IsStartVolumeAutoWindowLevel;
  double StartVolumeWindowLevel[2];
  double LastVolumeWindowLevel[2];

  int WindowLevelAdjustedLayer;

  bool BackgroundVolumeEditable;
  bool ForegroundVolumeEditable;

  int AdjustMode;

private:
  vtkMRMLWindowLevelWidget(const vtkMRMLWindowLevelWidget&) = delete;
  void operator=(const vtkMRMLWindowLevelWidget&) = delete;
};

#endif