Source

Coin / src / vrml97 / DragSensor.cpp

Peder Blekken a78b2c9 
Marius Kintel 3ba6b41 




























Peder Blekken a78b2c9 

Lars J. Aas 94c1d19 





Morten Eriksen c87bbb2 


Morten Eriksen 9037fa8 








Morten Eriksen aa39f96 
Morten Eriksen c87bbb2 

Peder Blekken a78b2c9 
Lars J. Aas 92263e4 
Peder Blekken a78b2c9 









Lars J. Aas 92263e4 

Peder Blekken a78b2c9 

Morten Eriksen 9037fa8 
Peder Blekken a78b2c9 





Morten Eriksen 9037fa8 


Peder Blekken a78b2c9 
Morten Eriksen 9037fa8 





Morten Eriksen e90eae6 
Morten Eriksen 9037fa8 





Peder Blekken a78b2c9 
Morten Eriksen 9037fa8 








Peder Blekken a78b2c9 








































































































































Lars J. Aas 94c1d19 
/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H

#ifdef HAVE_VRML97

/*!
  \class SoVRMLDragSensor SoVRMLDragSensor.h Inventor/VRMLnodes/SoVRMLDragSensor.h
  \brief The SoVRMLDragSensor class is a superclass for VRML drag sensors.

  This class collects the two fields that are common for some of the
  sensor nodes, plus some common functions for these. Since this is an
  abstract "helper" class, it does not represent an actual node from
  the VRML97 specification, so don't use it as such.

  For more information, a detailed discussion of drag sensors is
  available in section 4.6.7.4 of the VRML97 specification:

  <http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.7.4>.
*/

#include <Inventor/VRMLnodes/SoVRMLDragSensor.h>

#include <Inventor/VRMLnodes/SoVRMLMacros.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoHandleEventAction.h>
#include <Inventor/elements/SoViewportRegionElement.h>
#include <Inventor/elements/SoViewVolumeElement.h>
#include <Inventor/events/SoLocation2Event.h>
#include <Inventor/events/SoMouseButtonEvent.h>
#include <Inventor/SoPickedPoint.h>
#include <Inventor/SbMatrix.h>

#include "nodes/SoSubNodeP.h"

/*!
  \var SoSFVec3f SoVRMLDragSensor::trackPoint_changed

  An event out that is generated when the trackpoint is changed.
*/

/*!
  \var SoSFBool SoVRMLDragSensor::autoOffset

  When \c TRUE, the offset field is updated when a dragging sequence
  is finished.  Default value is \c TRUE.
*/

/*!
  \fn SbBool SoVRMLDragSensor::dragStart(void)

  \COININTERNAL

  Called when dragger is selected (picked) by the user.
*/
/*!
  \fn void SoVRMLDragSensor::drag(void)

  \COININTERNAL

  Called when user drags the mouse after picking the dragger.
*/
/*!
  \fn void SoVRMLDragSensor::dragFinish(void)

  \COININTERNAL

  Called when mouse button is released after picking and interacting
  with the dragger.
*/


SO_NODE_ABSTRACT_SOURCE(SoVRMLDragSensor);

// Doc in parent
void
SoVRMLDragSensor::initClass(void)
{
  SO_NODE_INTERNAL_INIT_ABSTRACT_CLASS(SoVRMLDragSensor, SO_VRML97_NODE_TYPE);
}

/*!
  Constructor.
*/
SoVRMLDragSensor::SoVRMLDragSensor(void)
{
  SO_NODE_CONSTRUCTOR(SoVRMLDragSensor);

  SO_VRMLNODE_ADD_EVENT_OUT(trackPoint_changed);
  SO_VRMLNODE_ADD_EXPOSED_FIELD(autoOffset, (TRUE));
}

/*!
  Destructor.
*/
SoVRMLDragSensor::~SoVRMLDragSensor()
{
}

// Doc in parent
void
SoVRMLDragSensor::handleEvent(SoHandleEventAction * action)
{
  if (!this->enabled.getValue()) {
    if (this->isActive.getValue()) {
      this->isActive = FALSE;
      this->dragFinish();
    }
    inherited::handleEvent(action);
    return;
  }

  const SoEvent * event = action->getEvent();

  SbBool buttondown = SO_MOUSE_PRESS_EVENT(event, BUTTON1);
  SbBool buttonup = SO_MOUSE_RELEASE_EVENT(event, BUTTON1);
  SbBool mousemove = event->isOfType(SoLocation2Event::getClassTypeId());
  SbBool active = this->isActive.getValue();

  if ((!active && mousemove) ||
      (active && buttondown) ||
      (!active && buttonup)) {
    inherited::handleEvent(action);
    return;
  }

  SoState * state = action->getState();

  this->mousepos = event->getPosition();
  this->normpos = event->getNormalizedPosition(SoViewportRegionElement::get(state));
  this->viewvolume = SoViewVolumeElement::get(state);

  if (!active && buttondown) {
    SbBool hit = FALSE;
    const SoPickedPoint * pp = action->getPickedPoint();
    if (pp) {
      const SoFullPath * currpath = (const SoFullPath*) action->getCurPath();
      SoFullPath * parentpath = (SoFullPath*) currpath->copy(0, currpath->getLength()-1);
      SoNode * parentnode = parentpath->getTail();
      parentpath->ref();
      hit = pp->getPath()->containsPath(parentpath);
      parentpath->unref();

      if (hit) {
        // set object space hit point
        this->obj2world = pp->getObjectToWorld(parentnode);
        this->world2obj = this->obj2world.inverse();
        this->world2obj.multVecMatrix(pp->getPoint(), this->hitpt);
        if (this->dragStart()) {
          this->isActive = TRUE;
        }
      }
    }
  }
  else if (active && buttonup) {
    this->dragFinish();
    this->isActive = FALSE;
  }
  else if (active && mousemove) {
    this->drag();
  }
  inherited::handleEvent(action);
}

/*!
  Returns the interaction starting point.
*/
const SbVec3f &
SoVRMLDragSensor::getLocalStartingPoint(void) const
{
  return this->hitpt;
}

/*!
  Returns the matrix that transforms to the world coordinate system.
*/
const SbMatrix &
SoVRMLDragSensor::getLocalToWorldMatrix(void) const
{
  return this->obj2world;
}

/*!
  Returns the matrix that transforms from the world coordinate system.
*/
const SbMatrix &
SoVRMLDragSensor::getWorldToLocalMatrix(void) const
{
  return this->world2obj;
}

/*!
  Returns the current view volume.
*/
const SbViewVolume &
SoVRMLDragSensor::getViewVolume(void) const
{
  return this->viewvolume;
}

/*!
  Returns the current normalized pointer position.
*/
const SbVec2f &
SoVRMLDragSensor::getNormalizedLocaterPosition(void) const
{
  return this->normpos;
}

#endif // HAVE_VRML97