Method nextFile

src/main_window.cpp:428–435

}

void MainWindow::nextFile() {
    QTreeWidgetItem *currentItem = tree_widget_img->currentItem();
    if (!currentItem) return;
    QTreeWidgetItem *nextItem = tree_widget_img->itemBelow(currentItem);
    if (!nextItem) return;
    tree_widget_img->setCurrentItem(nextItem);
    treeWidgetClicked();
}

void MainWindow::previousFile() {
    QTreeWidgetItem *currentItem = tree_widget_img->currentItem();