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#include "widgets/gallery.h"
#include <QHBoxLayout>
#include <QNetworkAccessManager>
#include <QNetworkDiskCache>
#include <QNetworkReply>
#include <QStandardPaths>
#include <QTimer>
gallery::gallery(QList<QUrl> imageList)
{
init();
images = imageList;
changeImage(0);
pageIndicator->setPageCount(imageList.length());
connect(backButton, &DIconButton::clicked, this, [ = ] {
changeImage(currentImage - 1);
});
connect(forwardButton, &DIconButton::clicked, this, [ = ] {
changeImage(currentImage + 1);
});
}
gallery::gallery(QList<QPair<QString, App*>> imageList, MainWindow *parent)
{
init();
imageView->installEventFilter(this);
banners = imageList;
mainwindow = parent;
changeLocalImage(0);
pageIndicator->setPageCount(imageList.length());
connect(backButton, &DIconButton::clicked, this, [ = ] {
changeLocalImage(currentImage - 1);
});
connect(forwardButton, &DIconButton::clicked, this, [ = ] {
changeLocalImage(currentImage + 1);
});
QTimer *timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, [ = ] {
if (banners.length() - 1 == currentImage) {
changeLocalImage(0);
} else {
changeLocalImage(currentImage + 1);
}
});
timer->start(5000);
}
void gallery::init()
{
QVBoxLayout *layout = new QVBoxLayout;
layout->setAlignment(Qt::AlignTop);
layout->setContentsMargins(0, 0, 0, 0);
setLayout(layout);
QHBoxLayout *container = new QHBoxLayout;
container->setAlignment(Qt::AlignTop);
layout->addLayout(container);
container->addStretch();
backButton = new DIconButton(DStyle::SP_ArrowBack);
backButton->setDisabled(true);
container->addWidget(backButton, 1, Qt::AlignVCenter);
imageView = new QLabel;
container->addWidget(imageView);
spinner = new DSpinner;
spinner->setFixedSize(50, 50);
spinner->hide();
container->addWidget(spinner);
forwardButton = new DIconButton(DStyle::SP_ArrowForward);
forwardButton->setDisabled(true);
container->addWidget(forwardButton, 1, Qt::AlignVCenter);
container->addStretch();
pageIndicator = new DPageIndicator;
layout->addWidget(pageIndicator);
}
void gallery::changeLocalImage(int index)
{
if (banners.length() != 1) {
backButton->setDisabled(false);
forwardButton->setDisabled(false);
}
if (index == 0) {
backButton->setDisabled(true);
} else if (index == banners.length() - 1) {
forwardButton->setDisabled(true);
}
currentImage = index;
pageIndicator->setCurrentPage(index);
const int width = imageView->width() * devicePixelRatioF();
QPixmap && pixmap = QPixmap::fromImage(QImage(banners[index].first)).scaled(width, width * 9/16, Qt::KeepAspectRatio, Qt::SmoothTransformation);
pixmap.setDevicePixelRatio(devicePixelRatioF());
imageView->setPixmap(pixmap);
}
void gallery::changeImage(int index)
{
if (images.length() != 1) {
backButton->setDisabled(false);
forwardButton->setDisabled(false);
}
if (index == 0) {
backButton->setDisabled(true);
} else if (index == images.length() - 1) {
forwardButton->setDisabled(true);
}
currentImage = index;
pageIndicator->setCurrentPage(index);
QNetworkAccessManager *networkManager = new QNetworkAccessManager;
QNetworkDiskCache *diskCache = new QNetworkDiskCache;
QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::CacheLocation);
diskCache->setCacheDirectory(cacheDir);
diskCache->setMaximumCacheSize(5242880);
networkManager->setCache(diskCache);
QNetworkRequest request;
request.setUrl(images[index]);
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
networkManager->get(request);
imageView->hide();
spinner->show();
spinner->start();
connect(networkManager, &QNetworkAccessManager::finished, this, [ = ] (QNetworkReply *reply) {
QByteArray imageData = reply->readAll();
QPixmap pixmap;
pixmap.loadFromData(imageData);
spinner->stop();
spinner->hide();
if (pixmap.isNull()) {
if (images.length() == 1) {
this->hide();
} else {
images.removeAt(index);
pageIndicator->setPageCount(images.length());
changeImage(0);
}
} else {
imageView->setPixmap(pixmap.scaled(imageView->width(), imageView->width() * 9/16, Qt::AspectRatioMode::KeepAspectRatio, Qt::SmoothTransformation));
imageView->show();
}
});
}
bool gallery::eventFilter(QObject *object, QEvent *event)
{
if (object == imageView && !banners.isEmpty() && event->type() == QEvent::MouseButtonRelease) {
mainwindow->openItem(banners[currentImage].second);
}
return QObject::eventFilter(object, event);
}
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