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** This file is part of the examples of the Qt Toolkit.
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#include <QtGui>
#include "window.h"
Window::Window()
{
thread = new RenderThread();
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()));
connect(thread, SIGNAL(sendBlock(Block)), this, SLOT(addBlock(Block)));
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);
setWindowTitle(tr("Queued Custom Type"));
}
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);
}
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);
}
void Window::resetUi()
{
loadButton->setEnabled(true);
resetButton->setEnabled(false);
}