qt 6.5.1 original

examples/widgets/itemviews/flattreeview/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(flattreeview LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/itemviews/flattreeview")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(flattreeview
+    main.cpp
+)
+
+set_target_properties(flattreeview PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(flattreeview PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+install(TARGETS flattreeview
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/itemviews/flattreeview/flattreeview.pro

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+QT += widgets
+
+SOURCES     = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/itemviews/flattreeview
+INSTALLS += target

examples/widgets/itemviews/flattreeview/main.cpp

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+// Copyright (C) 2017 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+/*
+  main.cpp
+
+  A simple example that shows a multi-column list using QTreeView.
+  The data is not a tree, so the first column was made movable.
+*/
+
+#include <QApplication>
+#include <QHeaderView>
+#include <QStandardItemModel>
+#include <QTreeView>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QStandardItemModel model(4, 2);
+    QTreeView treeView;
+    treeView.setModel(&model);
+    treeView.setRootIsDecorated(false);
+    treeView.header()->setFirstSectionMovable(true);
+    treeView.header()->setStretchLastSection(true);
+
+    for (int row = 0; row < 4; ++row) {
+        for (int column = 0; column < 2; ++column) {
+            QModelIndex index = model.index(row, column, QModelIndex());
+            model.setData(index, QVariant((row + 1) * (column + 1)));
+        }
+    }
+
+    treeView.setWindowTitle(QObject::tr("Flat Tree View"));
+    treeView.show();
+    return app.exec();
+}