SoView2DInteraction.h

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/*************************************************************************************
**
** Copyright 2017, 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 <SoInteractionHandler.h>
 
#include "SoView2DExtension.h"
#include "View2DPosition.h"

class MutableView2DPosition : public View2DPosition
{
public:
  MutableView2DPosition(SoView2D* viewer) : View2DPosition(viewer) {}
  void setDevicePosition(const SbVec2f& pos) { _relPos = pos; }
  void setVoxelPosition(const SbVec3f& pos) { _voxelPos = pos; }
  void setViewport(const SbVec2f& origin, const SbVec2f& size)
  {
    _vpOrigin = origin; _vpSize = size;
  }
};
 
//===================================================================================

class View2DInteractionHandler : public SoInteractionHandler
{
public:
  View2DInteractionHandler(SoView2D* viewer, SoInteractionProvider* provider);
 
protected:
  bool augmentLocation(SoPointerPosition& position, bool dragging) override;

  bool isEnabled(SoPointingAction* action, int currentMask) override;

  bool isValidStartingLocation(const SoPointerPosition& location) override;

  MutableView2DPosition _view2DPosition;

  SoView2D* _viewer;

  bool _dragging;
};

class View2DInteractionProvider : public SoInteractionProvider
{
public:
  View2DInteractionProvider(SoView2D* viewer);

  std::list<SoInteraction*> getInteractions(SoState* state) override;

  void pointerPosition(SoState* state, const SoPointerPosition& pos) override;

  void pointerLeftWindow(SoState* state) override;
 
protected:
  const SoNodeList* getExtensionList(SoState* state);

  bool isExtensionEnabled(SoView2DExtension* ext) const;

  SoView2D* _viewer;
};
 
class SoView2DKeyboardAction : public SoCommandAction
{
public:
  SoView2DKeyboardAction(SoView2D* view, const std::string& id, SoKeyboardEvent::Key key, bool withShift = false);
  SoView2DKeyboardAction(SoView2D* view, const std::string& id, SoKeyboardEvent::Key key, SoKeyboardEvent::Key key2);
 
  bool isNumberKey() const { return _numberKey; }
 
  void execute() override;
 
protected:
  SoView2D* getView() const;
  bool _numberKey;
};