bool PixelOrientedViewNavigator::eventFilter(QObject *widget, QEvent *e) {

    if(e->type() != QEvent::MouseButtonDblClick && e->type() != QEvent::MouseMove)
        return false;

    GlMainWidget *glWidget = (GlMainWidget *) widget;

    if (!glWidget->hasMouseTracking()) {
        glWidget->setMouseTracking(true);
    }

    if (!pixelView->smallMultiplesViewSet() && !pixelView->interactorsEnabled()) {
        pixelView->toggleInteractors(true);
    }

    if (pixelView->getOverviews().size() == 0) {
        return false;
    }

    if (e->type() == QEvent::MouseMove && pixelView->smallMultiplesViewSet()) {
        QMouseEvent *me = (QMouseEvent *) e;
        int x = glWidget->width() - me->x();
        int y = me->y();
        Coord screenCoords(x, y, 0);
        Coord sceneCoords = glWidget->getScene()->getGraphCamera().viewportTo3DWorld(glWidget->screenToViewport(screenCoords));
        PixelOrientedOverview *overviewUnderPointer = getOverviewUnderPointer(sceneCoords);

        if (overviewUnderPointer != NULL && overviewUnderPointer != selectedOverview) {
            selectedOverview = overviewUnderPointer;
        }

        return true;
    }
    else if (e->type() == QEvent::MouseButtonDblClick) {
        if (selectedOverview != NULL && !selectedOverview->overviewGenerated()) {
            pixelView->generatePixelOverview(selectedOverview, glWidget);
            glWidget->draw();
        }
        else if (selectedOverview != NULL && pixelView->smallMultiplesViewSet()) {
            QtGlSceneZoomAndPanAnimator zoomAndPanAnimator(glWidget, selectedOverview->getBoundingBox());
            zoomAndPanAnimator.animateZoomAndPan();
            pixelView->switchFromSmallMultiplesToDetailView(selectedOverview);
            selectedOverview = NULL;
        }
        else if (!pixelView->smallMultiplesViewSet() && pixelView->getOverviews().size() > 1) {
            pixelView->switchFromDetailViewToSmallMultiples();
            QtGlSceneZoomAndPanAnimator zoomAndPanAnimator(glWidget, pixelView->getSmallMultiplesViewBoundingBox());
            zoomAndPanAnimator.animateZoomAndPan();
            pixelView->centerView();
        }

        return true;
    }

    return false;
}
bool ScatterPlot2DViewNavigator::eventFilter(QObject *widget, QEvent *e) {

  if (glWidget == nullptr) {
    glWidget = static_cast<GlMainWidget *>(widget);
  }

  if (glWidget != nullptr) {
    if (!glWidget->hasMouseTracking()) {
      glWidget->setMouseTracking(true);
    }

    if (!scatterPlot2dView->matrixViewSet() && !scatterPlot2dView->interactorsEnabled()) {
      scatterPlot2dView->toggleInteractors(true);
    }

    if (e->type() == QEvent::MouseMove && scatterPlot2dView->matrixViewSet()) {
      QMouseEvent *me = static_cast<QMouseEvent *>(e);
      int x = glWidget->width() - me->x();
      int y = me->y();
      Coord screenCoords(x, y, 0.0f);
      Coord sceneCoords(glWidget->getScene()->getGraphCamera().viewportTo3DWorld(
          glWidget->screenToViewport(screenCoords)));
      selectedScatterPlotOverview = getOverviewUnderPointer(sceneCoords);
      return true;
    } else if (e->type() == QEvent::MouseButtonDblClick) {
      if (selectedScatterPlotOverview != nullptr &&
          !selectedScatterPlotOverview->overviewGenerated()) {
        scatterPlot2dView->generateScatterPlot(selectedScatterPlotOverview, glWidget);
        glWidget->draw();
      } else if (selectedScatterPlotOverview != nullptr && scatterPlot2dView->matrixViewSet()) {
        QtGlSceneZoomAndPanAnimator zoomAndPanAnimator(
            glWidget, selectedScatterPlotOverview->getBoundingBox());
        zoomAndPanAnimator.animateZoomAndPan();
        scatterPlot2dView->switchFromMatrixToDetailView(selectedScatterPlotOverview, true);
        selectedScatterPlotOverview = nullptr;
      } else if (!scatterPlot2dView->matrixViewSet()) {
        scatterPlot2dView->switchFromDetailViewToMatrixView();
        QtGlSceneZoomAndPanAnimator zoomAndPanAnimator(glWidget,
                                                       scatterPlot2dView->getMatrixBoundingBox());
        zoomAndPanAnimator.animateZoomAndPan();
      }

      return true;
    }
  }

  return false;
}