Method mappingSequenceTableDragDropMove

QKeyMapper/qmappingsequenceedit.cpp:1201–1262

}

void QMappingSequenceEdit::mappingSequenceTableDragDropMove(int top_row, int bottom_row, int dragged_to)
{
    MappingSequenceEditTableWidget *table = ui->mappingSequenceEditTable;

    const int rowCount = m_MappingSequenceList.size();
    if (rowCount <= 0) {
        return;
    }

    top_row = qBound(0, top_row, rowCount - 1);
    bottom_row = qBound(0, bottom_row, rowCount - 1);
    if (top_row > bottom_row) {
        qSwap(top_row, bottom_row);
    }

    dragged_to = qBound(0, dragged_to, rowCount - 1);

    const int draggedCount = bottom_row - top_row + 1;
    if (draggedCount <= 0) {
        return;
    }

    // If dropping inside the dragged range, no-op.
    if (dragged_to >= top_row && dragged_to <= bottom_row) {
        return;
    }

    ensureBaseSnapshotBeforeListChange();

    const bool isDraggedToBottom = (dragged_to > bottom_row);

    QStringList moved;
    moved.reserve(draggedCount);
    for (int i = top_row; i <= bottom_row; ++i) {
        moved.append(m_MappingSequenceList.at(i));
    }

    // Remove original block
    for (int i = 0; i < draggedCount; ++i) {
        m_MappingSequenceList.removeAt(top_row);
    }

    int insertPos = dragged_to;
    if (isDraggedToBottom) {
        // List shrinks above the drop target.
        insertPos = dragged_to - draggedCount + 1;
    }
    insertPos = qBound(0, insertPos, m_MappingSequenceList.size());

    for (int i = 0; i < moved.size(); ++i) {
        m_MappingSequenceList.insert(insertPos + i, moved.at(i));
    }

    refreshMappingSequenceEditTableWidget(table, m_MappingSequenceList);

    const int newTop = insertPos;
    const int newBottom = insertPos + draggedCount - 1;
    reselectionRangeAndScroll(newTop, newBottom);