qt6-bb10/examples/widgets/itemviews/simpletreemodel/main.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "treemodel.h"
#include <QApplication>
#include <QFile>
#include <QScreen>
#include <QTreeView>
using namespace Qt::StringLiterals;
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QFile file(":/default.txt"_L1);
file.open(QIODevice::ReadOnly | QIODevice::Text);
TreeModel model(QString::fromUtf8(file.readAll()));
file.close();
QTreeView view;
view.setModel(&model);
view.setWindowTitle(TreeModel::tr("Simple Tree Model"));
for (int c = 0; c < model.columnCount(); ++c)
view.resizeColumnToContents(c);
view.expandAll();
const auto screenSize = view.screen()->availableSize();
view.resize({screenSize.width() / 2, screenSize.height() * 2 / 3});
view.show();
return QCoreApplication::exec();
}