Inventor/Win/viewers/SoWinExaminerViewer.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/



#ifndef _SO_WIN_EXAMINER_VIEWER_
#define _SO_WIN_EXAMINER_VIEWER_

#include <Inventor/Win/SoWinBeginStrict.h>

#include <Inventor/Win/viewers/SoWinFullViewer.h>
#include <Inventor/events/SoMouseButtonEvent.h>
#include <Inventor/Gui/viewers/SoGuiExaminerViewer.h>

// classes used
class SbSphereSheetProjector;
class SoFieldSensor;
class SoSeparator;
class SoSwitch;
class SoTranslation;
class SoScale;
class SoWinBitmapButton;

//
// Class: SoWinExaminerViewer
//
//  Examiner viewer - allows the user to change the camera position
//  by spinning a sphere in front of the viewpoint.
//
//
//  Keys used by this viewer:
//  -------------------------
//
//  Left Mouse: Tumbles the virtual trackball.
//
//  Middle Mouse: 
//  Ctrl + Left Mouse: Translate up, down, left and right.
//
//  Ctrl + Middle Mouse: 
//  Left + Middle Mouse: Dolly in and out (gets closer to and further
//  away from the object).
//
//  Shift + Ctrl + Left Mouse: Dolly in and out (same as Left + Middle
//  behavior but added by VSG to support the
//  standard Microsoft 2-button mouse).
//
//  <s> + click: Alternative to the Seek button. Press (but do not hold 
//               down) the <s> key, then click on a target object.
//
//  Right Mouse: Open the popup menu.
//

class  SoWinExaminerViewer : public SoWinFullViewer 
{

 public:

  enum ViewingMode 
  {
    VIEWING_MODE_SPIN,

    VIEWING_MODE_SPIN_CONSTRAINED,

    VIEWING_MODE_PAN,

    VIEWING_MODE_ZOOM
  };

  enum ConstrainedViewingMode 
  {
    NONE,
    CONSTRAINED_VIEWING_MODE_X,

    CONSTRAINED_VIEWING_MODE_Y,

    CONSTRAINED_VIEWING_MODE_Z,
  };

  SoWinExaminerViewer( SoWidget parent = NULL,
                       const char* name = NULL, 
                       SbBool buildInsideParent = TRUE, 
                       SoWinFullViewer::BuildFlag flag = SoWinFullViewer::BUILD_ALL, 
                       SoWinViewer::Type type = SoWinViewer::BROWSER );
  ~SoWinExaminerViewer();

  void setViewingMode( ViewingMode viewingMode ) ;

  ViewingMode getViewingMode() const
  { return (ViewingMode)m_guiExamViewer->getViewingMode(); }

  void setConstrainedViewingMode( ConstrainedViewingMode mode );

  ConstrainedViewingMode getConstrainedViewingMode() const
  { return m_constrainedMode; }

  // Constrained viewer.
  class  SoViewingFunction 
  {
  public:
    void setViewer(SoWinViewer* viewer) { m_viewer = viewer; }

    virtual void apply() const = 0;

    private:
    SoWinViewer* m_viewer;
  };
 
  class  SoViewingSphericalRotation : public SoViewingFunction 
  {
  private:
    void apply() const;
  };
  
  class  SoViewingTranslation : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingRotationX : public SoViewingFunction 
  {
  private:
    void apply() const;
  };
  
  class  SoViewingRotationY : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingRotationZ : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingRotationXViewer : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingRotationYViewer : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingRotationZViewer : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingSeek : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingDolly : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingReverseDolly : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  class  SoViewingEmpty : public SoViewingFunction 
  {
  private:
    void apply() const;
  };

  virtual void addFunctionKeyBinding( SoKeyboardEvent::Key key, const SoViewingFunction* viewingFunc );

  virtual void removeFunctionKeyBinding( SoKeyboardEvent::Key functionKey );

  virtual void addViewingMouseBinding( SoKeyboardEvent::Key* keys = NULL, 
                                       int numKey = 0,
                                       SoMouseButtonEvent::Button *mouseBtn = NULL, 
                                       int numMouseBtn = 0,
                                       const SoViewingFunction *viewingFunc = NULL );
  virtual void removeViewingMouseBinding( SoKeyboardEvent::Key* keys = NULL,
                                          int numKeys = 0,
                                          SoMouseButtonEvent::Button* mouseBtn = NULL,
                                          int numMouseBtn = 0 );

  // End Constrained viewer.

  // Defines the list of functions that supports this viewer.

  void setFeedbackVisibility( SbBool onOrOff );

  SbBool isFeedbackVisible() const { return m_guiExamViewer->isFeedbackVisible(); }

  void setFeedbackSize( int newSize );

  int getFeedbackSize() const { return m_guiExamViewer->getFeedbackSize(); }

  void setAnimationEnabled( SbBool onOrOff );

  SbBool isAnimationEnabled() { return m_guiExamViewer->isAnimationEnabled(); }

  void stopAnimating();

  SbBool isAnimating() { return m_guiExamViewer->isAnimating(); }

  // redefine these to add Examiner viewer functionality
  virtual void viewAll();
  virtual void resetToHomePosition();
  virtual void setCamera( SoCamera* cam );
  virtual void setViewing( SbBool onOrOff );
  virtual void setCursorEnabled( SbBool onOrOff );
  virtual void setSeekMode( SbBool onOrOff );

  virtual void activateSpinning( const SbVec2s& newLocator );

  virtual void activatePanning( const SbVec2s& newLocator );

  virtual void activateDolly( const SbVec2s& newLocator );

  virtual void activateRoll( const SbVec2s& newLocator );

  virtual void rollCamera( const SbVec2s &newLocator );

  virtual void spinCamera( const SbVec2f &newLocator );

  virtual void spinConstrainedCamera( const SbVec2f& newLocator, int axisIndex );

  virtual void dollyCamera( const SbVec2s &newLocator );

  virtual void reverseDollyCamera( const SbVec2s& newLocator );

  virtual void panCamera( const SbVec2f& newLocator );

  private:

  SoGuiExaminerViewer* getGuiExaminerViewer() const;

  private:

      virtual void rotateCamera( const SbRotation& rot );

  void constrainCameraRotation( bool x = false, bool y = false, bool z = false );

 private:

  // This constructor takes a boolean whether to build the widget now.
  // Subclasses can pass FALSE, then call SoWinExaminerViewer::buildWidget()
  // when they are ready for it to be built.
  SoEXTENDER
    SoWinExaminerViewer( SoWidget parent,
                         const char* name, 
                         SbBool buildInsideParent, 
                         SoWinFullViewer::BuildFlag flag, 
                         SoWinViewer::Type type, 
                         SbBool buildNow,
                         SbBool sync = TRUE );

  // redefine these
  virtual SbString getDefaultWidgetName() const;
  virtual SbString getDefaultTitle() const;
  virtual SbString getDefaultIconTitle() const;

  // redefine those routines to do viewer specific stuff
  virtual void processEvent( XAnyEvent* anyevent );
  virtual void actualRedraw();

  // Get X resources for the widget.
  SoWidget buildWidget( SoWidget parent );

  // Define those thumb wheels to rotate the object
  virtual void bottomWheelMotion( float newVal );
  virtual void leftWheelMotion( float newVal );
  virtual void rightWheelMotion( float newVal );
  virtual void mouseWheelMotion( float newVal );

  // redefine those routines to also stop animation if any
  virtual void bottomWheelStart();
  virtual void leftWheelStart();

  // add viewer preference stuff
  virtual void createPrefSheet();

  // add some viewer buttons
  virtual void createViewerButtons( SoWidget parent );

  // build examiner viewer specific popup menu
  // Note: Examiner viewer uses a slightly different popup menu
  // resource that has two more items in the preferences submenu.
  virtual void buildPopupMenu();

  // Define this to bring the viewer help card
  virtual void openViewerHelpCard();

  // It's a long story, but since we can't attach callbacks to a window
  // quite like we can to an Xt widget, it makes more sense for the
  // subclass viewer to handle the buttons it knows about then pass
  // the rest back up to SoWinFullViewer.
  //
  // So WINxx this function must be virtual and protected, not private.
  virtual void pushButtonCB( SoWidget w, int id, void* data );

  virtual void doSpinAnimation();

  virtual void updateCursor();

 private:
  SoGuiExaminerViewer* m_guiExamViewer; // Implementation class for SoXxExaminerViewer

  // Viewer state variables
  SoGuiExaminerViewer::ViewingSpinType m_viewingSpinType;
  ConstrainedViewingMode m_constrainedMode; // Constrained viewing type

  SbBool firstBuild; // set FALSE after buildWidget called once

  // point of rotation feedback vars
  static char* geometryBuffer;

  // variables used for doing spinning animation
  long lastMotionTime;
  static void visibilityChangeCB( void* pt, SbBool visible );

 private:

  // viewer state variables
  int m_mouseReady; 
  SbBool m_viewingOnOffFlag;
 
  int m_prevFlag;
  
  // Members used to return in the previous mode after using binding function:
  // Set to true when a binding function start.
  SbBool m_needToBeReset;
  // Viewer mode before launching binding function.
  int m_prevCursorMode;

  void updateViewerMode( unsigned int state );
  void switchMode( int newMode );
  void setViewerMode();

  // push button vars and callbacks
  SoWinBitmapButton* buttonList[10];
  static void camPushCB( SoWidget w, SoWinExaminerViewer* v, void* data );

  // this is called by both constructors
  void constructorCommon( SbBool buildNow );

  // Utility function called from processEvent
  void processPopupItem( int item );
};

#include <Inventor/Win/SoWinEndStrict.h>

#endif /* _SO_WIN_EXAMINER_VIEWER_ */

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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