some of QModel to QModel

[baray98]

I made a model , a tree model to be precised and I want to copy an item in my tree including its children. What is the easiest and cleanest solution to this, I tried searching but wasn't able to find some samples. To the guru's please help the novice out

baray98

[jpn]

Here's a small example which is capable of copying and pasting selected items. Unfortunately it doesn't take children into account, but that should be "only" a matter of reimplementing QAbstractItemModel::mimeData() and QAbstractItemModel::dropMimeData().

#include <QtGui>
 
class TreeView : public QTreeView
{
protected:
    void keyPressEvent(QKeyEvent *event)
    {
        if (event == QKeySequence::Copy)
        {
            QModelIndexList indexes = selectionModel()->selectedIndexes();
            QMimeData *data = model()->mimeData(indexes);
            QApplication::clipboard()->setMimeData(data);
            event->accept();
        }
        else if (event == QKeySequence::Paste)
        {
            QModelIndex index = currentIndex();
            const QMimeData *data = QApplication::clipboard()->mimeData();
            if (model()->dropMimeData(data, Qt::CopyAction, index.row() + 1, index.column(), index.parent()))
                setCurrentIndex(index.sibling(index.row() + 1, index.column()));
            event->accept();
        }
        else
        {
            QAbstractItemView::keyPressEvent(event);
        }
    }
};
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QStandardItemModel model;
    QStandardItem *parentItem = model.invisibleRootItem();
    for (int i = 0; i < 4; ++i) {
        QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
        parentItem->appendRow(item);
        parentItem = item;
    }
 
    TreeView view;
    view.setModel(&model);
    view.show();
    return app.exec();
}

#include <QtGui>

class TreeView : public QTreeView
{
protected:
    void keyPressEvent(QKeyEvent *event)
    {
        if (event == QKeySequence::Copy)
        {
            QModelIndexList indexes = selectionModel()->selectedIndexes();
            QMimeData *data = model()->mimeData(indexes);
            QApplication::clipboard()->setMimeData(data);
            event->accept();
        }
        else if (event == QKeySequence::Paste)
        {
            QModelIndex index = currentIndex();
            const QMimeData *data = QApplication::clipboard()->mimeData();
            if (model()->dropMimeData(data, Qt::CopyAction, index.row() + 1, index.column(), index.parent()))
                setCurrentIndex(index.sibling(index.row() + 1, index.column()));
            event->accept();
        }
        else
        {
            QAbstractItemView::keyPressEvent(event);
        }
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QStandardItemModel model;
    QStandardItem *parentItem = model.invisibleRootItem();
    for (int i = 0; i < 4; ++i) {
        QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
        parentItem->appendRow(item);
        parentItem = item;
    }

    TreeView view;
    view.setModel(&model);
    view.show();
    return app.exec();
}

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