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68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
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#ifndef FILE_NODE_HPP__
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#define FILE_NODE_HPP__
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#include <QTreeWidgetItem>
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#include "RemoteFile.hpp"
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class QNetworkAccessManager;
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class QString;
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class QUrl;
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//
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// A holder for a RemoteFile object linked to a QTreeWidget row.
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//
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// It renders the file name in first column and holds download
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// progress data in the second column. The progress information is a
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// 64 bit integer number of bytes in the DisplayRole and a total bytes
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// expected in the UserRole. The first column also renders a check box
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// that downloads the file when checked and removes the downloaded
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// file when unchecked. The URL and local absolute file path are
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// stored in the UserData and UserData+1 roles of the first column.
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//
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class FileNode final
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: public QTreeWidgetItem
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, protected RemoteFile::ListenerInterface
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{
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public:
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explicit FileNode (QTreeWidgetItem * parent
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, QNetworkAccessManager * network_manager
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, QString const& local_path
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, QUrl const& url);
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bool local () const {return remote_file_.local ();}
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bool sync (bool local);
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void abort ();
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static int const Type {UserType + 1};
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//
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// Clients may use this RAII class to block nested calls to sync
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// which may be troublesome, e.g. when UI updates cause recursion.
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//
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struct sync_blocker
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{
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sync_blocker (FileNode * node) : node_ {node} {node_->block_sync_ = true;}
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sync_blocker (sync_blocker const&) = delete;
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sync_blocker& operator = (sync_blocker const&) = delete;
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~sync_blocker () {node_->block_sync_ = false;}
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private:
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FileNode * node_;
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};
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protected:
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void error (QString const& title, QString const& message) override;
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bool redirect_request (QUrl const&) override {return true;} // allow
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void download_progress (qint64 bytes_received, qint64 total_bytes) override;
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void download_finished (bool success) override;
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private:
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QNetworkAccessManager * network_manager_;
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RemoteFile remote_file_; // active download
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bool block_sync_;
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friend struct sync_blocker;
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};
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#endif
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