Пример #1
0
void PlaylistView::moveItems(int steps)
{
    PlaylistModel *playlistModel = dynamic_cast<PlaylistModel *>(this->model());
    if (playlistModel == nullptr)
    {
        return;
    }

    QItemSelection indexList = this->selectionModel()->selection();
    std::sort(indexList.begin(), indexList.end(), steps > 0 ? sortQItemSelectionDesc : sortQItemSelectionAsc);

    for (QItemSelection::const_iterator i = indexList.cbegin(); i != indexList.cend(); ++i)
    {
        int top = i->top();
        int btm = i->bottom();
        int count = abs(top - btm);

        int srcRow = min(top, btm);
        int destRow = srcRow + steps;

        QModelIndex newIdx = steps > 0 ? playlistModel->index(destRow + count, 0) : playlistModel->index(srcRow - 1, 0);
        QModelIndex oldIdx = steps > 0 ? playlistModel->index(srcRow, 0) : playlistModel->index(srcRow + count, 0);
        if (newIdx.isValid())
        {
            this->selectionModel()->select(newIdx, QItemSelectionModel::SelectionFlag::Select | QItemSelectionModel::SelectionFlag::Rows);
            this->selectionModel()->select(oldIdx, QItemSelectionModel::SelectionFlag::Deselect | QItemSelectionModel::SelectionFlag::Rows);


            playlistModel->moveRows(playlistModel->index(0, 0),
                                    srcRow,
                                    count,
                                    playlistModel->index(playlistModel->rowCount(QModelIndex()) - 1,
                                                         playlistModel->columnCount(QModelIndex()) - 1),
                                    destRow);
        }
    }
}
Пример #2
0
void PlaylistView::keyPressEvent(QKeyEvent *event)
{
    PlaylistModel *playlistModel = dynamic_cast<PlaylistModel *>(this->model());
    if (playlistModel == nullptr)
    {
        return;
    }
    
    QModelIndex bot = playlistModel->index(playlistModel->rowCount(QModelIndex()) - 1, 0);
    QModelIndex top = playlistModel->index(0, 0);

    int key = event->key();
    switch (key)
    {
        case Qt::Key_Delete:
        {
            QItemSelection indexList = this->selectionModel()->selection();

            int lastCount = 0;
            for (QItemSelection::const_iterator i = indexList.cbegin(); i != indexList.cend(); ++i)
            {
                int btm = i->bottom();
                int top = i->top();

                if (btm < 0 || top < 0)
                {
                    break;
                }

                lastCount = abs(top - btm) + 1;
                playlistModel->removeRows(min(btm, top), lastCount);
            }
        }
        break;

        case Qt::Key_W:
            this->moveItems(-1);
            break;

        case Qt::Key_S:
            this->moveItems(1);
            break;

        case Qt::Key_Home:
        case Qt::Key_End:
            if ((event->modifiers() & Qt::ShiftModifier) == Qt::ShiftModifier)
            {
                QModelIndex cur = this->currentIndex();
                
                QItemSelectionRange aboveCur(top, cur);
                
                QItemSelection selection;
                selection.append(aboveCur);
                this->selectionModel()->select(selection,
                                               ((key == Qt::Key_Home) ? QItemSelectionModel::Select : QItemSelectionModel::Deselect) | QItemSelectionModel::Rows);
                selection.clear();
                
                QItemSelectionRange belowCur(cur, bot);
                selection.append(belowCur);
                this->selectionModel()->select(selection,
                                               ((key == Qt::Key_Home) ? QItemSelectionModel::Deselect : QItemSelectionModel::Select) | QItemSelectionModel::Rows);
                
                // make sure the current index is selected
                this->selectionModel()->select(this->currentIndex(),
                                               QItemSelectionModel::Select | QItemSelectionModel::Rows);
                
                break;
            }
            else if ((event->modifiers() & Qt::NoModifier) == Qt::NoModifier)
            {
                this->setCurrentIndex((key == Qt::Key_Home) ? top : bot);
                break;
            }
            else
            {
                [[fallthrough]];
            }

        default:
            QTableView::keyPressEvent(event);
            break;
    }
}