Moving items between models

[xtal256]

I am trying to make a dialog with two lists, where items can be moved between each list, like so:



I am using a QListView and QStringListModel. How can i move the selected items from one list model to the other?

This is what i have got so far:

void moveToRight() {
    QStringListModel* leftModel = (QStringListModel*)leftListView->model();
    QStringListModel* rightModel = (QStringListModel*)rightListView->model();
 
    leftListView->setUpdatesEnabled(false);
    rightListView->setUpdatesEnabled(false);
 
    QModelIndexList indexes = leftListView->selectionModel()->selectedIndexes();
    qSort(indexes.begin(), indexes.end());
 
    // Add the selected items to the right list
    for (int i = 0; i < indexes.count(); i++) {
        //rightModel->insertRow(indexes.at(i).row());
        // I'm guessing i could get the QStringList from the model
        // and add to that.
    }
 
    // Then remove them from the left list
    for (int i = indexes.count() - 1; i > -1; --i) {
        leftModel->removeRow(0);
    }
 
    leftListView->setUpdatesEnabled(true);
    rightListView->setUpdatesEnabled(true);
}

void moveToRight() {
    QStringListModel* leftModel = (QStringListModel*)leftListView->model();
    QStringListModel* rightModel = (QStringListModel*)rightListView->model();

    leftListView->setUpdatesEnabled(false);
    rightListView->setUpdatesEnabled(false);

    QModelIndexList indexes = leftListView->selectionModel()->selectedIndexes();
    qSort(indexes.begin(), indexes.end());

    // Add the selected items to the right list
    for (int i = 0; i < indexes.count(); i++) {
        //rightModel->insertRow(indexes.at(i).row());
        // I'm guessing i could get the QStringList from the model
        // and add to that.
    }

    // Then remove them from the left list
    for (int i = indexes.count() - 1; i > -1; --i) {
        leftModel->removeRow(0);
    }

    leftListView->setUpdatesEnabled(true);
    rightListView->setUpdatesEnabled(true);
}

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I do not yet know of a way to add the items to the other model. Also, the removing doesn't seem to work.

[mcosta]

This code works fine

void Widget::on_moveRightButton_clicked()
{
    QModelIndexList leftSelection = ui->leftView->selectionModel ()->selectedIndexes ();
 
    int rowCount;
    Q_FOREACH (QModelIndex idx, leftSelection) {
        rowCount = m_rightModel.rowCount ();
        m_rightModel.insertRow (rowCount);
 
        m_rightModel.setData (m_rightModel.index (rowCount), idx.data ());
    }
 
    for (int i = leftSelection.size (); i > 0; --i) {
        m_leftModel.removeRow (leftSelection.at (i - 1).row ());
    }
}
 
void Widget::on_moveLeftButton_clicked()
{
    QModelIndexList rightSelection = ui->rightView->selectionModel ()->selectedIndexes ();
 
    int rowCount;
    Q_FOREACH (QModelIndex idx, rightSelection) {
        rowCount = m_leftModel.rowCount ();
        m_leftModel.insertRow (rowCount);
 
        m_leftModel.setData (m_leftModel.index (rowCount), idx.data ());
    }
 
    for (int i = rightSelection.size (); i > 0; --i) {
        m_rightModel.removeRow (rightSelection.at (i - 1).row ());
    }
}

void Widget::on_moveRightButton_clicked()
{
    QModelIndexList leftSelection = ui->leftView->selectionModel ()->selectedIndexes ();

    int rowCount;
    Q_FOREACH (QModelIndex idx, leftSelection) {
        rowCount = m_rightModel.rowCount ();
        m_rightModel.insertRow (rowCount);

        m_rightModel.setData (m_rightModel.index (rowCount), idx.data ());
    }

    for (int i = leftSelection.size (); i > 0; --i) {
        m_leftModel.removeRow (leftSelection.at (i - 1).row ());
    }
}

void Widget::on_moveLeftButton_clicked()
{
    QModelIndexList rightSelection = ui->rightView->selectionModel ()->selectedIndexes ();

    int rowCount;
    Q_FOREACH (QModelIndex idx, rightSelection) {
        rowCount = m_leftModel.rowCount ();
        m_leftModel.insertRow (rowCount);

        m_leftModel.setData (m_leftModel.index (rowCount), idx.data ());
    }

    for (int i = rightSelection.size (); i > 0; --i) {
        m_rightModel.removeRow (rightSelection.at (i - 1).row ());
    }
}

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[xtal256]

Yeah, that worked. Thanks.

I suppose i could have figured it out myself, i just though i'd ask in-case there was a better way. Btw, in your example, you didn't sort the indexes. I think this is necessary in order to remove them from the model without invalidating the indexes (at least, that's what i heard).