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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "window.h"
//! [Window constructor start]
Window::Window()
{
thread = new RenderThread();
//! [Window constructor start] //! [set up widgets and connections]
label = new QLabel();
label->setAlignment(Qt::AlignCenter);
loadButton = new QPushButton(tr("&Load image..."));
resetButton = new QPushButton(tr("&Stop"));
resetButton->setEnabled(false);
connect(loadButton, SIGNAL(clicked()), this, SLOT(loadImage()));
connect(resetButton, SIGNAL(clicked()), thread, SLOT(stopProcess()));
connect(thread, SIGNAL(finished()), this, SLOT(resetUi()));
//! [set up widgets and connections] //! [connecting signal with custom type]
connect(thread, SIGNAL(sendBlock(Block)), this, SLOT(addBlock(Block)));
//! [connecting signal with custom type]
QHBoxLayout *buttonLayout = new QHBoxLayout();
buttonLayout->addStretch();
buttonLayout->addWidget(loadButton);
buttonLayout->addWidget(resetButton);
buttonLayout->addStretch();
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(label);
layout->addLayout(buttonLayout);
//! [Window constructor finish]
setWindowTitle(tr("Queued Custom Type"));
}
//! [Window constructor finish]
void Window::loadImage()
{
QStringList formats;
foreach (QByteArray format, QImageReader::supportedImageFormats())
if (format.toLower() == format)
formats.append("*." + format);
QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"),
path, tr("Image files (%1)").arg(formats.join(" ")));
if (newPath.isEmpty())
return;
QImage image(newPath);
if (!image.isNull()) {
loadImage(image);
path = newPath;
}
}
void Window::loadImage(const QImage &image)
{
QDesktopWidget desktop;
QImage useImage;
QRect space = desktop.availableGeometry();
if (image.width() > 0.75*space.width() || image.height() > 0.75*space.height())
useImage = image.scaled(0.75*space.width(), 0.75*space.height(),
Qt::KeepAspectRatio, Qt::SmoothTransformation);
else
useImage = image;
pixmap = QPixmap(useImage.width(), useImage.height());
pixmap.fill(qRgb(255, 255, 255));
label->setPixmap(pixmap);
loadButton->setEnabled(false);
resetButton->setEnabled(true);
thread->processImage(useImage);
}
//! [Adding blocks to the display]
void Window::addBlock(const Block &block)
{
QColor color = block.color();
color.setAlpha(64);
QPainter painter;
painter.begin(&pixmap);
painter.fillRect(block.rect(), color);
painter.end();
label->setPixmap(pixmap);
}
//! [Adding blocks to the display]
void Window::resetUi()
{
loadButton->setEnabled(true);
resetButton->setEnabled(false);
}
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