SoView2DSlider.h

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/*************************************************************************************
**
** Copyright 2013, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
 
 
#pragma once
 
#include "SoView2DInteractionExtension.h"
 
#include "../View2DIcons.h"
 
class SOVIEW2D_API SoView2DSlider : public SoView2DInteractionExtension
{
  SO_NODE_HEADER(SoView2DSlider);
 
public:
  enum SLIDER_ORIENTATION
  {
    ORIENTATION_HORIZONTAL = 0,
    ORIENTATION_VERTICAL   = 1
  };
 
  enum SLIDER_HIT_RESULT
  {
    HIT_RESULT_NONE              = 0, 
    HIT_RESULT_BEFORE_INDICATOR  = 1, 
    HIT_RESULT_ON_INDICATOR      = 2, 
    HIT_RESULT_BEHIND_INDICATOR  = 3  
  };
 
 
  SoSFFloat minimumValue;
  SoSFFloat maximumValue;
  SoSFFloat currentValue;
  SoSFBool useTracking;
  SoSFFloat stepSize;
  SoSFFloat snapSize;
  SoSFBool revertDirection;
 
  SoSFBool isMouseOver;
  SoSFBool isDragging;
 
  SoSFEnum orientation;
  SoSFFloat relativeXPosition;
  SoSFFloat relativeYPosition;
  SoSFFloat relativeLength;
  SoSFFloat relativeWidth;
 
  SoSFColor indicatorColor;
  SoSFFloat indicatorAlpha;
  SoSFColor sliderColor;
  SoSFFloat sliderAlpha;
 
  SoSFBool useIndicatorIconFile;
  SoSFString  indicatorIconFile;
 
  SoSFBool useBackgroundIconFile;
  SoSFString  backgroundIconFile;
 
  static void   initClass();
 
  SoView2DSlider();
  ~SoView2DSlider() override;
 
  void draw(View2DSliceList* dsl, View2DSlice* dslice, int slice) override;
 
  bool evalEvent(SoView2D* view2d, View2DSliceList* slicelist, View2DEvent* ec, View2DEventPhase phase) override;
 
  bool ignoreEvent(View2DEvent* ec) override;
 
  bool implementsManagedInteractionAndClassicEventHandling() const override { return false; }
 
protected:
 
  int getHitResult(SoView2D* view2d, const SbVec2f& deviceHitPosition);
  bool positionIsInBox(const SbVec2f& position, const SbVec2f& boundingBoxMin, const SbVec2f& boundingBoxMax) const;
 
  void computeDeviceBoxes(View2DSliceList* dsl, int slice, SbVec2f &sliderMin, SbVec2f &sliderMax, SbVec2f &indicatorMin, SbVec2f &indicatorMax);
 
 
  void fillDeviceBoundingBoxWholeSlider(SbVec2f& minBoundingBox, SbVec2f& maxBoundingBox);
  void fillDeviceBoundingBoxIndicator(SbVec2f& minBoundingBox, SbVec2f& maxBoundingBox);
 
  SbVec2f getMiddleDevicePosition(View2DSliceList* slicelist, int z);
  float getDeviceSliderLength(View2DSliceList* slicelist, int z);
  float getDeviceSliderWidth(View2DSliceList* slicelist, int z);
 
  void fillVisibleDeviceRect(View2DSliceList* slicelist, int z, SbVec2f& minDeviceRect, SbVec2f& maxDeviceRect);
 
  void startDragging(const SbVec2f& currentDevicePosition);
  void dragging(const SbVec2f& currentDevicePosition);
  void stopDragging();
 
  bool _isDragging;
  float _startDraggingCurrentValue;
  float _currentValue;
  SbVec2f _startDevicePosition;
  SbVec2f _currentDevicePosition;
 
  SbVec2f _sliderMin;
  SbVec2f _sliderMax;
 
  View2DIcons* _indicatorIcon;
  View2DIcons* _backgroundIcon;
 
  void setupIndicatorIcon();
  void setupBackgroundIcon();
 
  bool isSensitiveAt(const SoPointerPosition& pos) override;
  void setHighlightAt(const SoPointerPosition&) override;
  void unsetHighlight() override;
  void startPressAt(const SoPointerPosition& pos) override;
  void dragMoveTo(const SoPointerPosition& pos) override;
  SoPointingAction* endPress(int clickCount) override;
};