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Diffstat (limited to 'examples/tutorials/modelview/7_selections/mainwindow.cpp')
| -rwxr-xr-x | examples/tutorials/modelview/7_selections/mainwindow.cpp | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/examples/tutorials/modelview/7_selections/mainwindow.cpp b/examples/tutorials/modelview/7_selections/mainwindow.cpp new file mode 100755 index 0000000..cb09633 --- /dev/null +++ b/examples/tutorials/modelview/7_selections/mainwindow.cpp @@ -0,0 +1,109 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [quoting modelview_a] +#include <QTreeView> +#include <QStandardItemModel> +#include <QItemSelectionModel> +#include "mainwindow.h" + +MainWindow::MainWindow(QWidget *parent) + : QMainWindow(parent) +{ + treeView = new QTreeView(this); + setCentralWidget(treeView); + standardModel = new QStandardItemModel ; + QStandardItem *rootNode = standardModel->invisibleRootItem(); + + + //defining a couple of items + QStandardItem *americaItem = new QStandardItem("America"); + QStandardItem *mexicoItem = new QStandardItem("Canada"); + QStandardItem *usaItem = new QStandardItem("USA"); + QStandardItem *bostonItem = new QStandardItem("Boston"); + QStandardItem *europeItem = new QStandardItem("Europe"); + QStandardItem *italyItem = new QStandardItem("Italy"); + QStandardItem *romeItem = new QStandardItem("Rome"); + QStandardItem *veronaItem = new QStandardItem("Verona"); + + //building up the hierarchy + rootNode-> appendRow(americaItem); + rootNode-> appendRow(europeItem); + americaItem-> appendRow(mexicoItem); + americaItem-> appendRow(usaItem); + usaItem-> appendRow(bostonItem); + europeItem-> appendRow(italyItem); + italyItem-> appendRow(romeItem); + italyItem-> appendRow(veronaItem); + + //register the model + treeView->setModel(standardModel); + treeView->expandAll(); + + //selection changes shall trigger a slot + QItemSelectionModel *selectionModel= treeView->selectionModel(); + connect(selectionModel, SIGNAL(selectionChanged (const QItemSelection &, const QItemSelection &)), + this, SLOT(selectionChangedSlot(const QItemSelection &, const QItemSelection &))); +} +//! [quoting modelview_a] + +//------------------------------------------------------------------------------------ + +//! [quoting modelview_b] +void MainWindow::selectionChangedSlot(const QItemSelection & /*newSelection*/, const QItemSelection & /*oldSelection*/) +{ + //get the text of the selected item + const QModelIndex index = treeView->selectionModel()->currentIndex(); + QString selectedText = index.data(Qt::DisplayRole).toString(); + //find out the hierarchy level of the selected item + int hierarchyLevel=1; + QModelIndex seekRoot = index; + while(seekRoot.parent() != QModelIndex()) + { + seekRoot = seekRoot.parent(); + hierarchyLevel++; + } + QString showString = QString("%1, Level %2").arg(selectedText) + .arg(hierarchyLevel); + setWindowTitle(showString); +} +//! [quoting modelview_b] + + |