Finding a item in second column of treeView

[ChrisW67]

Ok. The default implementation of match() only searches in a column (as documented). The only column in which a recursive search makes sense is column 0 (the only one with a hierarchy) and that column does not contain the values you are seeking. You need to provide a reimplementation of match() if you wish to recurse down column 0 but search a different (or all) columns in each row.

You could also/instead store the ID on the Qt::UserRole of the item in column 0 to allow match() to search that way.

#include <QApplication>
#include <QStandardItemModel>
#include <QTreeView>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QStandardItemModel model;
 
    for (int i = 0; i < 4; ++i) {
        QStandardItem *parentItem = model.invisibleRootItem();
        for (int j = 0; j < 3; ++j) {
            QStandardItem *item0 = new QStandardItem(QString("item %0").arg(j));
            item0->setData(100 + j, Qt::UserRole);
            QStandardItem *item1 = new QStandardItem(QString::number(100 + j));
            parentItem->appendRow(QList<QStandardItem*>() << item0 << item1);
            parentItem = item0;
        }
    }
 
    QModelIndexList matches = model.match(
                model.index(0,0),
                Qt::UserRole,
                QVariant(102),
                -1,
                Qt::MatchRecursive);
 
    QTreeView view;
    view.setModel(&model);
    view.show();
    view.expandAll();
    foreach (const QModelIndex &match, matches)
        view.selectionModel()->select(match, QItemSelectionModel::Select);
 
    return a.exec();
}

#include <QApplication>
#include <QStandardItemModel>
#include <QTreeView>

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

    QStandardItemModel model;

    for (int i = 0; i < 4; ++i) {
        QStandardItem *parentItem = model.invisibleRootItem();
        for (int j = 0; j < 3; ++j) {
            QStandardItem *item0 = new QStandardItem(QString("item %0").arg(j));
            item0->setData(100 + j, Qt::UserRole);
            QStandardItem *item1 = new QStandardItem(QString::number(100 + j));
            parentItem->appendRow(QList<QStandardItem*>() << item0 << item1);
            parentItem = item0;
        }
    }

    QModelIndexList matches = model.match(
                model.index(0,0),
                Qt::UserRole,
                QVariant(102),
                -1,
                Qt::MatchRecursive);

    QTreeView view;
    view.setModel(&model);
    view.show();
    view.expandAll();
    foreach (const QModelIndex &match, matches)
        view.selectionModel()->select(match, QItemSelectionModel::Select);

    return a.exec();
}

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