qt 6.5.1 original

examples/widgets/tutorials/modelview/3_changingmodel/3_changingmodel.pro

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+TARGET = mv_changingmodel
+
+TEMPLATE = app
+
+QT += widgets
+requires(qtConfig(tableview))
+
+SOURCES += main.cpp \
+           mymodel.cpp
+
+HEADERS += mymodel.h
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/modelview/3_changingmodel
+INSTALLS += target

examples/widgets/tutorials/modelview/3_changingmodel/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(mv_changingmodel LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/tutorials/modelview/3_changingmodel")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(mv_changingmodel
+    main.cpp
+    mymodel.cpp mymodel.h
+)
+
+set_target_properties(mv_changingmodel PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(mv_changingmodel PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+install(TARGETS mv_changingmodel
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/tutorials/modelview/3_changingmodel/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QApplication>
+#include <QTableView>
+#include "mymodel.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    QTableView tableView;
+    MyModel myModel;
+    tableView.setModel(&myModel);
+    tableView.show();
+    return a.exec();
+}

examples/widgets/tutorials/modelview/3_changingmodel/mymodel.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "mymodel.h"
+
+#include <QTime>
+
+//! [quoting mymodel_a]
+MyModel::MyModel(QObject *parent)
+    : QAbstractTableModel(parent)
+    , timer(new QTimer(this))
+{
+    timer->setInterval(1000);
+    connect(timer, &QTimer::timeout , this, &MyModel::timerHit);
+    timer->start();
+}
+//! [quoting mymodel_a]
+//-------------------------------------------------------
+int MyModel::rowCount(const QModelIndex & /*parent */) const
+{
+    return 2;
+}
+
+//-------------------------------------------------------
+int MyModel::columnCount(const QModelIndex & /*parent */) const
+{
+    return 3;
+}
+
+//-------------------------------------------------------
+//! [quoting mymodel_QVariant ]
+QVariant MyModel::data(const QModelIndex &index, int role) const
+{
+    int row = index.row();
+    int col = index.column();
+
+    if (role == Qt::DisplayRole && row == 0 && col == 0)
+        return QTime::currentTime().toString();
+
+    return QVariant();
+}
+//! [quoting mymodel_QVariant ]
+//-------------------------------------------------------
+//! [quoting mymodel_b ]
+void MyModel::timerHit()
+{
+    // we identify the top left cell
+    QModelIndex topLeft = createIndex(0,0);
+    // emit a signal to make the view reread identified data
+    emit dataChanged(topLeft, topLeft, {Qt::DisplayRole});
+}
+//! [quoting mymodel_b ]

examples/widgets/tutorials/modelview/3_changingmodel/mymodel.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef MYMODEL_H
+#define MYMODEL_H
+
+#include <QAbstractTableModel>
+#include <QTimer>
+
+class MyModel : public QAbstractTableModel
+{
+    Q_OBJECT
+public:
+    explicit MyModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+
+private slots:
+    void timerHit();
+
+private:
+    QTimer *timer;
+};
+
+#endif // MYMODEL_H