70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
#ifndef PREVIEW_IMAGEITEM_HXX
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#define PREVIEW_IMAGEITEM_HXX
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#include <memory>
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#include <QQuickItem>
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#include <QUrl>
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#include <QImage>
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#include <QNetworkReply>
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class QNetworkAccessManager;
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class PreviewImageItem : public QQuickItem
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{
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Q_OBJECT
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Q_PROPERTY(QUrl imageUrl READ imageUrl WRITE setImageUrl NOTIFY imageUrlChanged)
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Q_PROPERTY(QSize sourceSize READ sourceSize NOTIFY sourceSizeChanged)
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Q_PROPERTY(bool isLoading READ isLoading NOTIFY isLoadingChanged)
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Q_PROPERTY(float aspectRatio READ aspectRatio NOTIFY sourceSizeChanged)
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public:
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PreviewImageItem(QQuickItem* parent = nullptr);
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~PreviewImageItem();
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QSGNode* updatePaintNode(QSGNode *, UpdatePaintNodeData *) override;
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QUrl imageUrl() const;
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QSize sourceSize() const;
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static void setGlobalNetworkAccess(QNetworkAccessManager* netAccess);
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bool isLoading() const;
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float aspectRatio() const;
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/**
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@brief clear the image immediately, so we don't see a stale / expired
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one while attemtping to load the next one
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*/
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Q_INVOKABLE void clear();
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signals:
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void imageUrlChanged();
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void sourceSizeChanged();
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void isLoadingChanged();
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public slots:
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void setImageUrl(QUrl url);
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private slots:
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void onDownloadError(QNetworkReply::NetworkError errorCode);
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void onFinished();
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private:
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void setImage(QImage image);
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void startDownload();
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QUrl m_imageUrl;
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bool m_imageDirty = false;
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QImage m_image;
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unsigned int m_downloadRetryCount = 0;
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bool m_requestActive = false;
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};
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#endif // PREVIEW_IMAGEITEM_HXX
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