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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef IMAGESCALING_H
#define IMAGESCALING_H
#include <QtWidgets>
#include <QtConcurrent>
#include <QNetworkAccessManager>
#include <optional>
class DownloadDialog;
class Images : public QWidget
{
Q_OBJECT
public:
Images(QWidget *parent = nullptr);
~Images();
void initLayout(qsizetype count);
QFuture<QByteArray> download(const QList<QUrl> &urls);
void updateStatus(const QString &msg);
void showImages(const QList<QImage> &images);
void abortDownload();
public slots:
void process();
void cancel();
private slots:
void scaleFinished();
private:
//! [1]
using OptionalImages = std::optional<QList<QImage>>;
//! [1]
static OptionalImages scaled(const QList<QByteArray> &data);
QPushButton *addUrlsButton;
QPushButton *cancelButton;
QVBoxLayout *mainLayout;
QList<QLabel *> labels;
QGridLayout *imagesLayout;
QStatusBar *statusBar;
DownloadDialog *downloadDialog;
QNetworkAccessManager qnam;
QList<QSharedPointer<QNetworkReply>> replies;
QFuture<QByteArray> downloadFuture;
QFutureWatcher<OptionalImages> scalingWatcher;
};
#endif // IMAGESCALING_H
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