window.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
/*
  window.cpp
 
  A minimal subclass of QTableView with slots to allow the selection model
  to be monitored.
*/
 
#include <QAbstractItemModel>
#include <QItemSelection>
#include <QItemSelectionModel>
#include <QStatusBar>
 
#include "model.h"
#include "window.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setWindowTitle("Selected items in a table model");
 
    model = new TableModel(8, 4, this);
 
    table = new QTableView(this);
    table->setModel(model);
 
    selectionModel = table->selectionModel();
    connect(selectionModel, &QItemSelectionModel::selectionChanged,
            this, &MainWindow::updateSelection);
    connect(selectionModel, &QItemSelectionModel::currentChanged,
            this, &MainWindow::changeCurrent);
 
    statusBar();
    setCentralWidget(table);
}
 
void MainWindow::updateSelection(const QItemSelection &selected,
    const QItemSelection &deselected)
{
    QModelIndexList items = selected.indexes();
 
    for (const QModelIndex &index : std::as_const(items)) {
        QString text = QString("(%1,%2)").arg(index.row()).arg(index.column());
        model->setData(index, text);
    }
 
    items = deselected.indexes();
 
    for (const QModelIndex &index : std::as_const(items)) {
        model->setData(index, QString());
}
 
void MainWindow::changeCurrent(const QModelIndex &current,
    const QModelIndex &previous)
{
    statusBar()->showMessage(
        tr("Moved from (%1,%2) to (%3,%4)")
            .arg(previous.row()).arg(previous.column())
            .arg(current.row()).arg(current.column()));
}