Method zoomToFitInternal

YUViewLib/src/ui/views/SplitViewWidget.cpp:1244–1343

}

void splitViewWidget::zoomToFitInternal()
{
  if (!this->playlist)
    // The playlist was not initialized yet. Nothing to draw (yet)
    return;

  this->setMoveOffset(QPoint(0, 0));

  auto item = this->playlist->getSelectedItems();

  if (item[0] == nullptr)
    // We cannot zoom to anything
    return;

  double fracZoom = 1.0;
  if (!isSplitting())
  {
    // Get the size of item 0 and the size of the widget and set the zoom factor so that this fits
    QSize item0Size = item[0]->getSize();
    if (item0Size.width() <= 0 || item0Size.height() <= 0)
      return;

    double zoomH = (double)size().width() / item0Size.width();
    double zoomV = (double)size().height() / item0Size.height();

    fracZoom = std::min(zoomH, zoomV);
  }
  else if (viewSplitMode == COMPARISON)
  {
    // We can just zoom to an item that is the size of the bigger of the two items
    QSize virtualItemSize = item[0]->getSize();

    if (item[1])
    {
      // Extend the size of the virtual item if a second item is available
      QSize item1Size = item[1]->getSize();
      if (item1Size.width() > virtualItemSize.width())
        virtualItemSize.setWidth(item1Size.width());
      if (item1Size.height() > virtualItemSize.height())
        virtualItemSize.setHeight(item1Size.height());
    }

    double zoomH = (double)size().width() / virtualItemSize.width();
    double zoomV = (double)size().height() / virtualItemSize.height();

    fracZoom = std::min(zoomH, zoomV);
  }
  else if (viewSplitMode == SIDE_BY_SIDE)
  {
    // We have to know the size of the split parts and calculate a zoom factor for each part
    int xSplit = int(size().width() * splittingPoint);

    // Left item
    QSize item0Size = item[0]->getSize();
    if (item0Size.width() <= 0 || item0Size.height() <= 0)
      return;

    double zoomH = (double)xSplit / item0Size.width();