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