Method onMenuZoomIn

YUViewLib/src/ui/Mainwindow.h:97–102

      v->zoomToFit(checked);
  }
  void onMenuZoomIn(bool checked)
  {
    const auto v = this->getCurrentActiveView();
    if (v)
      v->zoomIn(checked);
  }
  void onMenuZoomOut(bool checked)
  {
    const auto v = this->getCurrentActiveView();