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//=============================================================================
//
//                               OpenFlipper
//        Copyright (C) 2008 by Computer Graphics Group, RWTH Aachen
//                           www.openflipper.org
//
//-----------------------------------------------------------------------------
//
//                                License
//
//  OpenFlipper is free software: you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
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//
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//  OpenFlipper 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
//  GNU Lesser General Public License for more details.
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//
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//  You should have received a copy of the GNU Lesser General Public License
//  along with OpenFlipper.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
//
//   $Revision$
//   $Author$
//   $Date$
//
//=============================================================================




//=============================================================================
//
//  CLASS CoreWidget - IMPLEMENTATION
//
//=============================================================================


//== INCLUDES =================================================================

// -------------------- mview
#include "CoreWidget.hh"

#include <OpenFlipper/BasePlugin/PluginFunctions.hh>
#include <OpenFlipper/common/GlobalOptions.hh>

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//== IMPLEMENTATION ==========================================================
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void CoreWidget::slotCustomContextMenu( const QPoint& _point ) {
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  QPoint   popupPosition;
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  QPoint   scenePos;
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  // Calculate popup position. Use the position from the viewer which was clicked on.
  popupPosition =  examiner_widgets_[PluginFunctions::activeExaminer()]->glMapToGlobal(_point);
  QPointF f = examiner_widgets_[PluginFunctions::activeExaminer()]->mapToScene(QPointF(_point.x(), _point.y()));
  scenePos = QPoint (f.x(), f.y());
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  // Call function to adapt the menu to the currently used contex.
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  updatePopupMenu(scenePos);
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  // If the menu is not correctly initialized, dont try to show it.
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  if ( !contextMenu_->isEmpty () )
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    contextMenu_->popup( popupPosition );
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}

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/** \brief Update context Menu when an arbitrary node has been clicked on.
 *
 * This function is called when a node has been clicked on not belonging to an object.
 * This context menu will show all function relevant for the Node.
 *
 * @param _menu Pointer to the context Menu
 * @param _node node which has been clicked on.
 */
void CoreWidget::updatePopupMenuNode(QMenu* _menu , ACG::SceneGraph::BaseNode* _node) {

  QString nodeName = QString(_node->name().c_str());
  QAction* typeEntry = new QAction( nodeName ,_menu );
  _menu->addAction( typeEntry );

  _menu->addSeparator();

  emit updateContextMenuNode(_node->id());

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  addContextMenus( _menu , CONTEXTNODEMENU, _node->id() ) ;
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}

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/** \brief Update context Menu when Coordsys node has been clicked on.
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 *
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 * This function is called when the coordinate system in a viewer has been clicked on.
 * This context menu will show all function relevant for the current view like the
 * projection/viewing direction...
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 *
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 * @param _menu Pointer to the context Menu
 * @param _part id of the coordsys part which has been clicked on.
 */
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void CoreWidget::updatePopupMenuCoordsysNode(QMenu* _menu  , const int /*_part*/) {
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//   std::cerr << "Coordsys part was : " << _part << std::endl;
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  QAction* typeEntry = new QAction("Viewer Settings",_menu);
  _menu->addAction( typeEntry );
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  _menu->addSeparator();
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  //====================================================================================================
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  // DrawModes
  //====================================================================================================
  slotUpdateViewerDrawMenu();
  _menu->addMenu( viewerDrawMenu_ );
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  //====================================================================================================
  // RenderingOptions
  //====================================================================================================
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  QMenu* renderingOptionsMenu = new QMenu("Rendering Options",_menu);
  renderingOptionsMenu->setIcon(QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"renderingOptions.png"));
  _menu->addMenu(renderingOptionsMenu);
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  QAction* projectionAction = 0;
  if ( examiner_widgets_[PluginFunctions::activeExaminer() ]->projectionMode() == glViewer::PERSPECTIVE_PROJECTION ) {
    projectionAction = new QAction( "Switch to Orthogonal Projection", renderingOptionsMenu );
    projectionAction->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"orthogonal.png") );
    projectionAction->setToolTip(   "Switch to perspective orthogonal mode.");
  } else {
    projectionAction = new QAction( "Switch to Perspective Projection", renderingOptionsMenu );
    projectionAction->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"perspective.png") );
    projectionAction->setToolTip(   "Switch to perspective projection mode.");
  }
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  projectionAction->setCheckable( false );
  projectionAction->setToolTip(   "Switch between <b>perspective</b> and "
      "<b>parrallel</b> projection mode.");
  projectionAction->setWhatsThis( "Switch projection modes<br><br>"
      "Switch between <b>perspective</b> and "
      "<b>parrallel</b> projection mode.");
  connect( projectionAction,SIGNAL( triggered() ), this, SLOT( slotContextSwitchProjection() ) );
  renderingOptionsMenu->addAction( projectionAction );
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  QAction* animation = renderingOptionsMenu->addAction("Animation");
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  animation->setToolTip("Animate rotation of objects");
  animation->setCheckable( true );
  animation->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"animation.png") );
  animation->setChecked( PluginFunctions::viewerProperties(PluginFunctions::activeExaminer()).animation() );
  connect(animation, SIGNAL(triggered(bool)), this , SLOT( slotLocalChangeAnimation(bool) ) );
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  //====================================================================================================

  QAction* backfaceCulling = renderingOptionsMenu->addAction("Backface Culling");
  backfaceCulling->setToolTip("Enable backface culling");
  backfaceCulling->setCheckable( true );
  backfaceCulling->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"backFaceCulling.png") );
  backfaceCulling->setChecked( PluginFunctions::viewerProperties().backFaceCulling() );
  connect(backfaceCulling, SIGNAL(triggered(bool)), this , SLOT( slotLocalChangeBackFaceCulling(bool) ) );

  //====================================================================================================

  QAction* twoSidedLighting = renderingOptionsMenu->addAction("Two-sided Lighting");
  twoSidedLighting->setToolTip("Enable two-sided lighting");
  twoSidedLighting->setCheckable( true );
  twoSidedLighting->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"twosidedLighting.png") );
  twoSidedLighting->setChecked( PluginFunctions::viewerProperties().twoSidedLighting() );
  connect(twoSidedLighting, SIGNAL(triggered(bool)), this , SLOT( slotLocalChangeTwoSidedLighting(bool) ) );
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  //====================================================================================================
  // Other Toplevel Action
  //====================================================================================================
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  _menu->addSeparator();
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  //====================================================================================================
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  QAction* homeAction = new QAction("Restore home view",_menu);
  homeAction->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"go-home.png") );
  homeAction->setCheckable( false );
  homeAction->setToolTip("Restore <b>home</b> view.");
  homeAction->setWhatsThis( "Restore home view<br><br>"
                            "Resets the view to the home view");
  _menu->addAction( homeAction );
  connect( homeAction,SIGNAL( triggered() ), this, SLOT( slotContextHomeView() ) );
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  QAction* setHomeAction = new QAction( "Set Home View" , _menu );
  setHomeAction->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"set-home.png") );
  setHomeAction->setCheckable( false );
  setHomeAction->setToolTip("Set <b>home</b> view");
  setHomeAction->setWhatsThis( "Store home view<br><br>"
                               "Stores the current view as the home view");
  _menu->addAction( setHomeAction);
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  connect( setHomeAction,SIGNAL( triggered() ), this, SLOT( slotContextSetHomeView() ) );

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  QAction* viewAllAction = new QAction( "View all", _menu );
  viewAllAction->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"viewall.png") );
  viewAllAction->setCheckable( false );
  viewAllAction->setToolTip("View all.");
  viewAllAction->setWhatsThis( "View all<br><br>"
                               "Move the objects in the scene so that"
                               " the whole scene is visible.");
  connect( viewAllAction,SIGNAL( triggered() ), this, SLOT( slotContextViewAll() ) );
  _menu->addAction( viewAllAction);
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  _menu->addSeparator();
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  //====================================================================================================
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  QAction* copyView = _menu->addAction("Copy View");
  copyView->setToolTip("Copy current view to clipboard");
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  copyView->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"edit-copy.png") );
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  connect(copyView, SIGNAL(triggered()), this, SLOT(slotCopyView()) );

  //====================================================================================================

  QAction* pasteView = _menu->addAction("Paste View");
  pasteView->setToolTip("Paste current view from clipboard");
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  pasteView->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"edit-paste.png") );
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  connect(pasteView, SIGNAL(triggered()), this , SLOT( slotPasteView( ) ) );
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  //====================================================================================================
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  QAction* snapshot = _menu->addAction("Snapshot");
  snapshot->setToolTip("Make a snapshot");
  snapshot->setIcon( QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"snapshot.png") );
  connect(snapshot, SIGNAL(triggered()), this, SLOT( slotSnapshot() ) );
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}

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/** \brief Update context Menu when background has been clicked on.
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 *
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 * This function is called when the background in a viewer has been clicked on.
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 * This context menu will show functions which are related to the background of the
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 * viewer.
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 *
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 * @param _menu Pointer to the context Menu
 * @param _point position in the viewer where the user clicked.
 */
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void CoreWidget::updatePopupMenuBackground(QMenu* _menu , const QPoint& /*_point*/) {
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  //====================================================================================================
  // DrawModes
  //====================================================================================================
  slotUpdateViewerDrawMenu();
  _menu->addMenu( viewerDrawMenu_ );

  _menu->addSeparator();

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  QAction* action = _menu->addAction("Set Background Color");
  action->setToolTip("Set the background color for the current viewer");
  action->setStatusTip(tr("Set the background color for the current viewer"));
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  action->setWhatsThis(tr("Set the background color for the current viewer"));
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  action->setIcon(QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"BackgroundColor.png") );
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  connect(action, SIGNAL(triggered()), this, SLOT(slotSetContextBackgroundColor()) );
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  /*
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   * Show coordsys context menu of coordsys if
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   * invisible...
   */

  ACG::SceneGraph::BaseNode* root = PluginFunctions::getSceneGraphRootNode();
  ACG::SceneGraph::BaseNode* coordSys = root->find("Core Coordsys Node");

  if(!coordSys->visible()) {
	  updatePopupMenuCoordsysNode(_menu, 0);
  }

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  // Tell Plugins to update their context Menu
  emit updateContextMenuBackground();

  addContextMenus( _menu , CONTEXTBACKGROUNDMENU ) ;

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}
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/** \brief Update context Menu an object has been clicked on.
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 *
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 * This function is called when an object has been clicked on.
 * This context menu will show all properties for the given object.
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 *
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 * @param _menu Pointer to the context Menu
 * @param _objectId Id of the object that has been clicked on.
 */
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void CoreWidget::updatePopupMenuObject(QMenu* _menu , BaseObjectData* _object ) {

  QAction* typeEntry = new QAction( typeName(_object->dataType()) ,_menu);
  typeEntry->setIcon(QIcon(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+ typeIcon(_object->dataType()) ));
  _menu->addAction( typeEntry );

  _menu->addSeparator( );

  // Tell Plugins to update their context Menu
  emit updateContextMenu(_object->id() );

  if ( addContextMenus( _menu , CONTEXTOBJECTMENU , _object->id() ) )
    _menu->addSeparator();

  // Add picking Menu
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  if (pickMenu_ != 0 && pickMenu_->actions().size() > 0) {
    pickMenu_->setTitle("&Picking");
    contextMenu_->addMenu( pickMenu_ );
    pickMenu_->setTearOffEnabled(true);
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  }
}

bool CoreWidget::addContextMenus( QMenu* _menu , ContextMenuType _type , int _id ) {

  bool added = false;

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  QMap< QString , QAction* > menuMap; //QMap sorts by key
  QMap< QString , QAction* > actionMap;

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  // Add context menus from plugins
  for ( uint i = 0 ; i < contextMenus_.size(); ++i ) {

    if ( contextMenus_[i].type != _type )
      continue;

    switch (contextMenus_[i].type) {
      case CONTEXTBACKGROUNDMENU:
        break;
      case CONTEXTOBJECTMENU:
        BaseObjectData* object;
        if ( !PluginFunctions::getObject(_id, object) ) {
          emit log(LOGERR,"Cant get object for objectContextMenu");
          continue;
        }

        // Datatype does not match
        if ( ! object->dataType(  contextMenus_[i].contextType ) )
          continue;

        break;
      case CONTEXTNODEMENU:
        break;

    }

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    QMenu* menu = contextMenus_[i].action->menu();

    if (menu == 0) //is it a menu
      actionMap[ contextMenus_[i].action->text() ] = contextMenus_[i].action;
    else
      menuMap[ contextMenus_[i].action->text() ] = contextMenus_[i].action;
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    added = true;

    // Get all Actions in the menu and its submenus.
    // Set their data to the picked Object id
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    QList< QAction *> allActions;
    if ( menu == 0) {
      allActions.push_back(contextMenus_[i].action);
    } else {
      allActions = menu->actions();
    }

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    while ( !allActions.empty() ) {
      QList< QAction *> tmpList;

      // Set userdata of all actions to the picked Object Id
      for ( int j = 0 ; j < allActions.size(); ++j ) {
        allActions[j]->setData( QVariant( _id ) );
        if ( allActions[j]->menu() != 0 )
          tmpList << allActions[j]->menu()->actions();
      }

      allActions = tmpList;
    }

  }

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  //first add all menus
  QMapIterator<QString, QAction*> it(menuMap);

  while (it.hasNext()) {
     it.next();
    _menu->addAction( it.value() );
  }

  _menu->addSeparator();

  //then all actions
  QMapIterator<QString, QAction*> it2(actionMap);
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  while (it2.hasNext()) {
     it2.next();
    _menu->addAction( it2.value() );
  }

  return added;
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}
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/** \brief check current context and initialize context menu according to this context.
 *
 * This function is called whenever a context menu for the corewidget is requested.
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 * It will decide about the current context, collect all menus for plugins and
 * construct the final context menu.
 */
void CoreWidget::updatePopupMenu(const QPoint& _point) {
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  // Clear the complete context menu.
  contextMenu_->clear();
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  // Clear the selection context menu part.
  contextSelectionMenu_->clear();
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  // =============================================================================
  // First do a picking on the current position to check which context we are in.
  // =============================================================================
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  int objectId = -1;
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  enum CONTEXTTYPE {
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    COORDSYSCONTEXT ,BACKGROUNDCONTEXT ,OBJECTCONTEXT, NODECONTEXT
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  } context = BACKGROUNDCONTEXT;
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  // Do picking in the gl area to find an object
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  unsigned int               node_idx, target_idx;
  ACG::Vec3d                 hit_point;
  BaseObjectData*            object;
  ACG::SceneGraph::BaseNode* node = 0;

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  if (examiner_widgets_[PluginFunctions::activeExaminer()]->pick( ACG::SceneGraph::PICK_ANYTHING,_point,node_idx, target_idx, &hit_point ) ) {
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    if ( PluginFunctions::getPickedObject(node_idx, object) ) {
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      objectId = object->id();
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      context  = OBJECTCONTEXT;
    } else {
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      node = ACG::SceneGraph::find_node( PluginFunctions::getSceneGraphRootNode() , node_idx );
      if ( node != 0 && ( node->name() == "Core Coordsys Node") )
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        context = COORDSYSCONTEXT;
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      else
        context = NODECONTEXT;
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    }
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  }

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  // =============================================================================
  // Depending on the context create the basic context menu.
  // =============================================================================
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  QIcon icon;
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  switch (context) {
    case BACKGROUNDCONTEXT:
      updatePopupMenuBackground(contextMenu_,_point);
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      return;
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      break;
    case OBJECTCONTEXT:
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      updatePopupMenuObject(contextMenu_ , object );
//       return;
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      break;
    case COORDSYSCONTEXT:
      updatePopupMenuCoordsysNode(contextMenu_,target_idx);
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      return;
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      break;
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    case NODECONTEXT:
      updatePopupMenuNode(contextMenu_,node);
      return;
      break;
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  }
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}

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void CoreWidget::slotSnapshotName() {
  std::cerr << "Todo : slotSnapShotName only sets name for current viewer" << std::endl;
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  QString fname = PluginFunctions::viewerProperties().snapshotName();

  fname.replace('%', '$');
  fname = QFileDialog::getSaveFileName ( 0, "Save snapshot name" );
  if (!fname.isEmpty())
  {
    fname.replace('$', '%');

    PluginFunctions::viewerProperties().snapshotBaseFileName(fname);
    QString msg="next snapshot: ";
    statusBar()->showMessage(msg);
  }

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}

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void CoreWidget::slotAddContextItem(QAction* _entry, ContextMenuType _type) {
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  MenuInfo info;
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  info.action = _entry;
  info.type   = _type;
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  contextMenus_.push_back(info);
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}

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void CoreWidget::slotAddContextItem( QAction* _entry , DataType _dataType ,ContextMenuType _type ) {
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  MenuInfo info;
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  info.action      = _entry;
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  info.contextType = _dataType;
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  info.type        = _type;
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  contextMenus_.push_back(info);
}

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void CoreWidget::slotUpdateViewerDrawMenu() {
  if ( drawGroupViewer_ ) {
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    disconnect( drawGroupViewer_ , SIGNAL( triggered( QAction * ) ),
                this             , SLOT( slotViewerDrawMenu( QAction * ) ) );
    delete( drawGroupViewer_ );
    drawGroupViewer_ = 0;
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  }
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  // Recreate drawGroup
  drawGroupViewer_ = new QActionGroup( this );
  drawGroupViewer_->setExclusive( false );
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  connect( drawGroupViewer_ , SIGNAL( triggered( QAction * ) ),
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           this       , SLOT( slotViewerDrawMenu( QAction * ) ) );

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  if ( !viewerDrawMenu_ ) {
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    QIcon icon;
    icon.addFile(OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"drawModes.png");
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    viewerDrawMenu_  = new QMenu("Set Draw Mode");
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    viewerDrawMenu_->setTearOffEnabled(true);
    viewerDrawMenu_->setIcon(icon);
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    connect(viewerDrawMenu_,SIGNAL(aboutToShow () ) , this, SLOT(slotUpdateGlobalDrawMenu() ) );
  }
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  // Collect available draw Modes
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  ACG::SceneGraph::CollectDrawModesAction actionAvailable;
  ACG::SceneGraph::traverse( PluginFunctions::getRootNode() , actionAvailable);
  availableGlobalDrawModes_ = actionAvailable.drawModes();
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  // Get currently active drawModes (first viewer only )
  // TODO: create combination from all viewers!
  int activeDrawModes = PluginFunctions::drawMode();
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  // Convert to ids
  std::vector< unsigned int > availDrawModeIds;
  availDrawModeIds = ACG::SceneGraph::DrawModes::getDrawModeIDs( availableGlobalDrawModes_ );
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  viewerDrawMenu_->clear();
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  for ( unsigned int i = 0; i < availDrawModeIds.size(); ++i )
  {
    unsigned int id    = availDrawModeIds[i];
    std::string  descr = ACG::SceneGraph::DrawModes::description( id );

    QAction * action = new QAction( descr.c_str(), drawGroupViewer_ );
    action->setCheckable( true );
    action->setChecked( ACG::SceneGraph::DrawModes::containsId( activeDrawModes, id ) );
  }

  viewerDrawMenu_->addActions( drawGroupViewer_->actions() );

}

void CoreWidget::slotViewerDrawMenu(QAction * _action) {
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  //======================================================================================
  // Get the mode toggled
  //======================================================================================
  unsigned int mode = 0;
  std::vector< unsigned int > availDrawModeIds;
  availDrawModeIds = ACG::SceneGraph::DrawModes::getDrawModeIDs( availableGlobalDrawModes_ );
  for ( unsigned int i = 0; i < availDrawModeIds.size(); ++i )
  {
    QString descr = QString( ACG::SceneGraph::DrawModes::description( availDrawModeIds[i] ).c_str() );

    if ( descr == _action->text() ) {
      mode = availDrawModeIds[i];
      break;
    }
  }
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  if ( qApp->keyboardModifiers() & Qt::ShiftModifier )
    PluginFunctions::viewerProperties().drawMode(  PluginFunctions::viewerProperties().drawMode() ^ mode );
  else
    PluginFunctions::viewerProperties().drawMode(mode );
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}

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//=============================================================================