<commit_before>/* -*-c++-*- Present3D - Copyright (C) 1999-2006 <NAME>
 *
 * This software is open source and may be redistributed and/or modified under
 * the terms of the GNU General Public License (GPL) version 2.0.
 * The full license is in LICENSE.txt file included with this distribution,.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * include LICENSE.txt for more details.
*/

#include <osgPresentation/PickEventHandler>
#include <osgPresentation/SlideEventHandler>

#include <osgViewer/Viewer>
#include <osg/Notify>
#include <osgDB/FileUtils>
#include <osg/io_utils>

#include <stdlib.h>

using namespace osgPresentation;

PickEventHandler::PickEventHandler(osgPresentation::Operation operation, const JumpData& jumpData):
    _operation(operation),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(operation="<<operation<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}

PickEventHandler::PickEventHandler(const std::string& str, osgPresentation::Operation operation, const JumpData& jumpData):
    _command(str),
    _operation(operation),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(str="<<str<<", operation="<<operation<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}

PickEventHandler::PickEventHandler(const osgPresentation::KeyPosition& keyPos, const JumpData& jumpData):
    _keyPos(keyPos),
    _operation(osgPresentation::EVENT),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(keyPos="<<keyPos._key<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}


bool PickEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv)
{
    if (ea.getHandled()) return false;

    switch(ea.getEventType())
    {
        case(osgGA::GUIEventAdapter::MOVE):
        case(osgGA::GUIEventAdapter::PUSH):
        case(osgGA::GUIEventAdapter::DRAG):
        case(osgGA::GUIEventAdapter::RELEASE):
        {
            if(ea.getEventType() == osgGA::GUIEventAdapter::PUSH)
            {
                _drawablesOnPush.clear();
            }
            osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
            osgUtil::LineSegmentIntersector::Intersections intersections;
            if (viewer->computeIntersections(ea, nv->getNodePath(), intersections))
            {
                for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr=intersections.begin();
                    hitr!=intersections.end();
                    ++hitr)
                {
                    if (_operation == FORWARD_MOUSE_EVENT)
                    {
                        osg::ref_ptr<osgGA::GUIEventAdapter> cloned_ea = osg::clone(&ea);

                        // clear touch-data as this prevents sending the event as mouse-event
                        cloned_ea->setTouchData(NULL);

                        // reproject mouse-coord
                        const osg::BoundingBox bb(hitr->drawable->getBoundingBox());
                        const osg::Vec3& p(hitr->localIntersectionPoint);

                        float transformed_x = (p.x() - bb.xMin()) / (bb.xMax() - bb.xMin());
                        float transformed_y = (p.z() - bb.zMin()) / (bb.zMax() - bb.zMin());

                        cloned_ea->setX(ea.getXmin() + transformed_x * (ea.getXmax() - ea.getXmin()));
                        cloned_ea->setY(ea.getYmin() + transformed_y * (ea.getYmax() - ea.getYmin()));
                        cloned_ea->setMouseYOrientation(osgGA::GUIEventAdapter::Y_INCREASING_UPWARDS);<commit_msg>Added handling of dynamic_cast<> returning NULL<commit_after>/* -*-c++-*- Present3D - Copyright (C) 1999-2006 <NAME>
 *
 * This software is open source and may be redistributed and/or modified under
 * the terms of the GNU General Public License (GPL) version 2.0.
 * The full license is in LICENSE.txt file included with this distribution,.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * include LICENSE.txt for more details.
*/

#include <osgPresentation/PickEventHandler>
#include <osgPresentation/SlideEventHandler>

#include <osgViewer/Viewer>
#include <osg/Notify>
#include <osgDB/FileUtils>
#include <osg/io_utils>

#include <stdlib.h>

using namespace osgPresentation;

PickEventHandler::PickEventHandler(osgPresentation::Operation operation, const JumpData& jumpData):
    _operation(operation),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(operation="<<operation<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}

PickEventHandler::PickEventHandler(const std::string& str, osgPresentation::Operation operation, const JumpData& jumpData):
    _command(str),
    _operation(operation),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(str="<<str<<", operation="<<operation<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}

PickEventHandler::PickEventHandler(const osgPresentation::KeyPosition& keyPos, const JumpData& jumpData):
    _keyPos(keyPos),
    _operation(osgPresentation::EVENT),
    _jumpData(jumpData),
    _drawablesOnPush()
{
    OSG_INFO<<"PickEventHandler::PickEventHandler(keyPos="<<keyPos._key<<", jumpData.relativeJump="<<jumpData.relativeJump<<", jumpData.="<<jumpData.slideNum<<", jumpData.layerNum="<<jumpData.layerNum<<std::endl;
}


bool PickEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv)
{
    if (ea.getHandled()) return false;

    osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
    if (!viewer) return false;

    switch(ea.getEventType())
    {
        case(osgGA::GUIEventAdapter::MOVE):
        case(osgGA::GUIEventAdapter::PUSH):
        case(osgGA::GUIEventAdapter::DRAG):
        case(osgGA::GUIEventAdapter::RELEASE):
        {
            if(ea.getEventType() == osgGA::GUIEventAdapter::PUSH)
            {
                _drawablesOnPush.clear();
            }
            osgUtil::LineSegmentIntersector::Intersections intersections;
            if (viewer->computeIntersections(ea, nv->getNodePath(), intersections))
            {
                for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr=intersections.begin();
                    hitr!=intersections.end();
                    ++hitr)
                {
                    if (_operation == FORWARD_MOUSE_EVENT)
                    {
                        osg::ref_ptr<osgGA::GUIEventAdapter> cloned_ea = osg::clone(&ea);

                        // clear touch-data as this prevents sending the event as mouse-event
                        cloned_ea->setTouchData(NULL);

                        // reproject mouse-coord
                        const osg::BoundingBox bb(hitr->drawable->getBoundingBox());
                        const osg::Vec3& p(hitr->localIntersectionPoint);

                        float transformed_x = (p.x() - bb.xMin()) / (bb.xMax() - bb.xMin());
                        float transformed_y = (p.z() - bb.zMin()) / (bb.zMax() - bb.zMin());

                        cloned_ea->setX(ea.getXmin() + transformed_x * (ea.getXmax() - ea.getXmin()));
                        cloned_ea->setY(ea.getYmin() + transformed_y * (ea.getYmax() - ea.getYmin()));
                        cloned_ea->setMouseYOrientation(osgGA::GUIEventAdapter::Y_INCREASING_UPWARDS);
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