Long live Qt!

1 files changed, 173 insertions, 0 deletions

diff --git a/examples/itemviews/chart/mainwindow.cpp b/examples/itemviews/chart/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "pieview.h"
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"), this);
+    QAction *openAction = fileMenu->addAction(tr("&Open..."));
+    openAction->setShortcut(QKeySequence(tr("Ctrl+O")));
+    QAction *saveAction = fileMenu->addAction(tr("&Save As..."));
+    saveAction->setShortcut(QKeySequence(tr("Ctrl+S")));
+    QAction *quitAction = fileMenu->addAction(tr("E&xit"));
+    quitAction->setShortcut(QKeySequence(tr("Ctrl+Q")));
+
+    setupModel();
+    setupViews();
+
+    connect(openAction, SIGNAL(triggered()), this, SLOT(openFile()));
+    connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
+    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
+
+    menuBar()->addMenu(fileMenu);
+    statusBar();
+
+    openFile(":/Charts/qtdata.cht");
+
+    setWindowTitle(tr("Chart"));
+    resize(870, 550);
+}
+
+void MainWindow::setupModel()
+{
+    model = new QStandardItemModel(8, 2, this);
+    model->setHeaderData(0, Qt::Horizontal, tr("Label"));
+    model->setHeaderData(1, Qt::Horizontal, tr("Quantity"));
+}
+
+void MainWindow::setupViews()
+{
+    QSplitter *splitter = new QSplitter;
+    QTableView *table = new QTableView;
+    pieChart = new PieView;
+    splitter->addWidget(table);
+    splitter->addWidget(pieChart);
+    splitter->setStretchFactor(0, 0);
+    splitter->setStretchFactor(1, 1);
+
+    table->setModel(model);
+    pieChart->setModel(model);
+
+    QItemSelectionModel *selectionModel = new QItemSelectionModel(model);
+    table->setSelectionModel(selectionModel);
+    pieChart->setSelectionModel(selectionModel);
+
+    QHeaderView *headerView = table->horizontalHeader();
+    headerView->setStretchLastSection(true);
+
+    setCentralWidget(splitter);
+}
+
+void MainWindow::openFile(const QString &path)
+{
+    QString fileName;
+    if (path.isNull())
+        fileName = QFileDialog::getOpenFileName(this, tr("Choose a data file"),
+                                                "", "*.cht");
+    else
+        fileName = path;
+
+    if (!fileName.isEmpty()) {
+        QFile file(fileName);
+
+        if (file.open(QFile::ReadOnly | QFile::Text)) {
+            QTextStream stream(&file);
+            QString line;
+
+            model->removeRows(0, model->rowCount(QModelIndex()), QModelIndex());
+
+            int row = 0;
+            do {
+                line = stream.readLine();
+                if (!line.isEmpty()) {
+
+                    model->insertRows(row, 1, QModelIndex());
+
+                    QStringList pieces = line.split(",", QString::SkipEmptyParts);
+                    model->setData(model->index(row, 0, QModelIndex()),
+                                   pieces.value(0));
+                    model->setData(model->index(row, 1, QModelIndex()),
+                                   pieces.value(1));
+                    model->setData(model->index(row, 0, QModelIndex()),
+                                   QColor(pieces.value(2)), Qt::DecorationRole);
+                    row++;
+                }
+            } while (!line.isEmpty());
+
+            file.close();
+            statusBar()->showMessage(tr("Loaded %1").arg(fileName), 2000);
+        }
+    }
+}
+
+void MainWindow::saveFile()
+{
+    QString fileName = QFileDialog::getSaveFileName(this,
+        tr("Save file as"), "", "*.cht");
+
+    if (!fileName.isEmpty()) {
+        QFile file(fileName);
+        QTextStream stream(&file);
+
+        if (file.open(QFile::WriteOnly | QFile::Text)) {
+            for (int row = 0; row < model->rowCount(QModelIndex()); ++row) {
+
+                QStringList pieces;
+
+                pieces.append(model->data(model->index(row, 0, QModelIndex()),
+                                          Qt::DisplayRole).toString());
+                pieces.append(model->data(model->index(row, 1, QModelIndex()),
+                                          Qt::DisplayRole).toString());
+                pieces.append(model->data(model->index(row, 0, QModelIndex()),
+                                          Qt::DecorationRole).toString());
+
+                stream << pieces.join(",") << "\n";
+            }
+        }
+
+        file.close();
+        statusBar()->showMessage(tr("Saved %1").arg(fileName), 2000);
+    }
+}