190b77463d
In order to demonstrate the new functionality, changed the example to download the images from the network, scale and show them by attaching different continuations to QFuture. Because QtConcurrent::map is not used anymore, removed the suspension functionality (supporting suspension of download would complicate the logic). Task-number: QTBUG-87205 Change-Id: I5a48b63195d28025ae8c5de28bc6d6178dad03db Reviewed-by: Paul Wicking <paul.wicking@qt.io> Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
92 lines
3.3 KiB
C++
92 lines
3.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2020 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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** This file is part of the examples of the Qt Toolkit.
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/
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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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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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QList<QImage> scaled() const;
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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:
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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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};
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#endif // IMAGESCALING_H
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