Method selectNextItem

YUViewLib/src/ui/widgets/PlaylistTreeWidget.cpp:572–615

}

bool PlaylistTreeWidget::selectNextItem(bool wrapAround, bool callByPlayback)
{
  QList<QTreeWidgetItem *> items = selectedItems();
  if (items.count() == 0)
    return false;

  // Get index of current item
  int idx = indexOfTopLevelItem(items[0]);

  // Is there a next item?
  if (idx == topLevelItemCount() - 1)
  {
    if (wrapAround)
      // The next item is 0
      idx = -1;
    else
      return false;
  }

  if (callByPlayback)
  {
    // Select the next item but emit the selectionRangeChanged event with changedByPlayback=true.
    const QScopedValueRollback<bool> back(ignoreSlotSelectionChanged, true);

    // Select the next item
    QTreeWidgetItem *nextItem = topLevelItem(idx + 1);
    setCurrentItem(nextItem, 0, QItemSelectionModel::ClearAndSelect);
    assert(selectedItems().count() == 1);

    // Do what the function slotSelectionChanged usually does but this time with
    // changedByPlayback=false.
    auto items = getSelectedItems();
    emit selectionRangeChanged(items[0], items[1], true);
  }
  else
    // Set next item as current and emit the selectionRangeChanged event with
    // changedByPlayback=false.
    setCurrentItem(topLevelItem(idx + 1));

  // Another item was selected. The caching thread also has to be notified about this.
  emit playlistChanged();

  return true;
}

void PlaylistTreeWidget::selectPreviousItem()
{