File indexing completed on 2024-12-22 04:17:44

 /***************************************************************************
  *                                                                         *
  *   copyright : (C) 2007 The University of Toronto                        *
  *                   netterfield@astro.utoronto.ca                         *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "scene.h"
 #include "view.h"
 #include "viewitem.h"
 #include "plotitem.h"
 #include "plotrenderitem.h"
 
 
 #include <QDebug>
 #include <QGraphicsItem>
 #include <QGraphicsSceneContextMenuEvent>
 
 namespace Kst {
 
 Scene::Scene(View *view)
   : QGraphicsScene(view) {
 }
 
 
 Scene::~Scene() {
 }
 
 /*
  * This is reimplemented because of a bug in Qt 4.3 QGraphicScene in the
  * way it handles context menu events.  The docs say that if an item ignores
  * this event that it'll be passed down to the next item underneath.  However,
  * this does not happen in the default implementation.
  */
 void Scene::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) {
   QList<QGraphicsItem*> list = items(event->scenePos());
   if (list.isEmpty()) {
     if (View *view = qobject_cast<View*>(parent())) {
       view->viewContextMenuEvent();
     }
   } else {
     foreach (QGraphicsItem *item, list) {
       ViewItem *viewItem = dynamic_cast<ViewItem*>(item);
       if (!viewItem)
         continue;
 
       if (viewItem->acceptsContextMenuEvents()) {
           event->setPos(viewItem->mapFromScene(event->scenePos()));
           if (viewItem->doSceneEvent(event))
             return;
       }
     }
   }
   QGraphicsScene::contextMenuEvent(event);
 }
 
 
 void Scene::dragEnterEvent(QGraphicsSceneDragDropEvent* event)
 {
   if (MimeDataViewItem::downcast(event->mimeData())) {
       event->acceptProposedAction();
   } else if (event->mimeData()->hasUrls()) {
     event->ignore();
   }
 }
 
 void Scene::dragMoveEvent(QGraphicsSceneDragDropEvent* event)
 {
   if (MimeDataViewItem::downcast(event->mimeData())) {
       event->acceptProposedAction();
   }
 }
 
 void Scene::dropEvent(QGraphicsSceneDragDropEvent* event)
 {
   const MimeDataViewItem* m = MimeDataViewItem::downcast(event->mimeData());
   if (m && m->item) {
     View* view = qobject_cast<View*>(parent());
     if (view->viewMode() != View::Layout) {
       view->setViewMode(View::Layout);
     }
     if (view != m->item->view()) {
       m->item->setView(view);
 
       m->item->setParentViewItem(0);
       addItem(m->item);
 
     }
     m->item->show();
     QPointF viewpos = view->mapFromScene(event->scenePos());
     //qDebug() << "viewpos: " << viewpos << " scenepos: " << event->scenePos();
     //qDebug() << "m hotspot: " << m->hotSpot << " rect: " << m->item->rect() <<
     //            " drop hot spot" << m->item->dropHotSpot << " topleft:" << m->item->rect().topLeft();
     m->item->moveTo(viewpos - m->item->rect().center() - m->item->dropHotSpot.toPoint());
     event->acceptProposedAction();
   } else {
     event->ignore();
   }
 }
 
 
 }
 
 // vim: ts=2 sw=2 et