示例#1
0
//===============================================================
bool MouseElementDeleter::eventFilter(QObject *widget, QEvent *e) {
  QMouseEvent *qMouseEv = (QMouseEvent *) e;

  if(qMouseEv != NULL) {
    node tmpNode;
    edge tmpEdge;
    ElementType type;
    GlMainWidget *glMainWidget = (GlMainWidget *) widget;

    if(e->type() == QEvent::MouseMove) {
      if (glMainWidget->doSelect(qMouseEv->x(), qMouseEv->y(), type, tmpNode, tmpEdge)) {
        glMainWidget->setCursor(QCursor(QPixmap(":/i_del.png")));
      }
      else {
        glMainWidget->setCursor(Qt::ArrowCursor);
      }

      return false;
    }
    else if (e->type() == QEvent::MouseButtonPress && qMouseEv->button()==Qt::LeftButton) {
      if (glMainWidget->doSelect(qMouseEv->x(), qMouseEv->y(), type, tmpNode, tmpEdge)) {
        Observable::holdObservers();
        Graph* graph = glMainWidget->getGraph();
        // allow to undo
        graph->push();

        switch(type) {
        case NODE:
          graph->delNode(tmpNode);
          break;

        case EDGE:
          graph->delEdge(tmpEdge);
          break;
        }

        glMainWidget->redraw();
        Observable::unholdObservers();
        return true;
      }
    }
  }

  return false;
}
// Event filter of the interactor component (main function of the interactor component)
bool InteractorPluginComponent::eventFilter(QObject *widget, QEvent *e) {

  if (e->type() == QEvent::MouseButtonRelease) {
    QMouseEvent * qMouseEv = (QMouseEvent *) e;
    GlMainWidget *glMainWidget = (GlMainWidget *) widget;

    if (qMouseEv->button()== Qt::LeftButton) {
      // Enter here if we have released the left button of the mouse

      // doSelect function return node/edge under the mouse
      node tmpNode;
      edge tmpEdge;
      ElementType type;
      bool result = glMainWidget->doSelect(qMouseEv->x(), qMouseEv->y(), type, tmpNode, tmpEdge);

      if (result) {
        // Enter here if we have node/edge under the mouse

        // Store selection property
        Graph *graph=glMainWidget->getScene()->getGlGraphComposite()->getInputData()->getGraph();
        string selectionPropertyName=glMainWidget->getScene()->getGlGraphComposite()->getInputData()->getElementSelectedPropName();
        BooleanProperty* selection=graph->getProperty<BooleanProperty>(selectionPropertyName);

        // Before do any think on the graph, we push the current state of the graph (this activate the undo/redo system)
        graph->push();

        // Deselect all nodes/edges
        selection->setAllNodeValue(false);
        selection->setAllEdgeValue(false);

        switch(type) {
        case NODE:
          // Set selection at true for selected node
          selection->setNodeValue(tmpNode, true);
          break;

        case EDGE:
          // Set selection at false for selected edge
          selection->setEdgeValue(tmpEdge, true);
          break;
        }

        // We have treated the event so we return true
        // (this event will not be passed to others interactorComponent)
        return true;
      }
    }
  }

  // We don't have treated the event so we return false
  // (this event will be passed to others interactorComponent)
  return false;
}