qt5base-lts/examples/itemviews/chart/mainwindow.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtWidgets>
#include "pieview.h"
#include "mainwindow.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"), this);
QAction *openAction = fileMenu->addAction(tr("&Open..."));
openAction->setShortcuts(QKeySequence::Open);
QAction *saveAction = fileMenu->addAction(tr("&Save As..."));
saveAction->setShortcuts(QKeySequence::SaveAs);
QAction *quitAction = fileMenu->addAction(tr("E&xit"));
quitAction->setShortcuts(QKeySequence::Quit);
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);
}
}