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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "window.h"
#include <QtWidgets>
//! [Window constructor start]
Window::Window(QWidget *parent)
: QWidget(parent), thread(new RenderThread(this))
{
//! [Window constructor start] //! [set up widgets and connections]
label = new QLabel(this);
label->setAlignment(Qt::AlignCenter);
loadButton = new QPushButton(tr("&Load image..."), this);
resetButton = new QPushButton(tr("&Stop"), this);
resetButton->setEnabled(false);
connect(loadButton, &QPushButton::clicked,
this, QOverload<>::of(&Window::loadImage));
connect(resetButton, &QPushButton::clicked,
thread, &RenderThread::stopProcess);
connect(thread, &RenderThread::finished,
this, &Window::resetUi);
//! [set up widgets and connections] //! [connecting signal with custom type]
connect(thread, &RenderThread::sendBlock,
this, &Window::addBlock);
//! [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;
const QList<QByteArray> supportedFormats = QImageReader::supportedImageFormats();
for (const QByteArray &format : supportedFormats)
if (format.toLower() == format)
formats.append(QLatin1String("*.") + QString::fromLatin1(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)
{
QImage useImage;
QRect space = QGuiApplication::primaryScreen()->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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