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| Rev | Author | Line No. | Line |
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| 801 | - | 1 | /* |
| 2 | * |
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| 3 | * This file is part of QMapControl, |
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| 4 | * an open-source cross-platform map widget |
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| 5 | * |
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| 6 | * Copyright (C) 2007 - 2008 Kai Winter |
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| 7 | * |
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| 8 | * This program is free software: you can redistribute it and/or modify |
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| 9 | * it under the terms of the GNU Lesser General Public License as published by |
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| 10 | * the Free Software Foundation, either version 3 of the License, or |
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| 11 | * (at your option) any later version. |
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| 12 | * |
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| 13 | * This program is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public License |
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| 19 | * along with QMapControl. If not, see <http://www.gnu.org/licenses/>. |
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| 20 | * |
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| 21 | * Contact e-mail: kaiwinter@gmx.de |
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| 22 | * Program URL : http://qmapcontrol.sourceforge.net/ |
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| 23 | * |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef IMAGEMANAGER_H |
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| 27 | #define IMAGEMANAGER_H |
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| 28 | |||
| 29 | #include <QObject> |
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| 30 | #include <QPixmapCache> |
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| 31 | #include <QDebug> |
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| 32 | #include <QMutex> |
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| 33 | #include <QFile> |
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| 34 | #include <QBuffer> |
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| 35 | #include <QDir> |
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| 36 | #include "mapnetwork.h" |
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| 37 | |||
| 38 | namespace qmapcontrol |
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| 39 | { |
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| 40 | class MapNetwork; |
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| 41 | /** |
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| 42 | @author Kai Winter <kaiwinter@gmx.de> |
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| 43 | */ |
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| 44 | class ImageManager : public QObject |
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| 45 | { |
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| 46 | Q_OBJECT; |
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| 47 | |||
| 48 | public: |
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| 49 | static ImageManager* instance() |
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| 50 | { |
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| 51 | if(!m_Instance) |
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| 52 | { |
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| 53 | m_Instance = new ImageManager; |
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| 54 | } |
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| 55 | return m_Instance; |
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| 56 | } |
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| 57 | |||
| 58 | ~ImageManager(); |
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| 59 | |||
| 60 | //! returns a QPixmap of the asked image |
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| 61 | /*! |
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| 62 | * If this component doesn´t have the image a network query gets started to load it. |
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| 63 | * @param host the host of the image |
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| 64 | * @param path the path to the image |
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| 65 | * @return the pixmap of the asked image |
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| 66 | */ |
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| 67 | QPixmap getImage(const QString& host, const QString& path); |
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| 68 | |||
| 69 | QPixmap prefetchImage(const QString& host, const QString& path); |
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| 70 | |||
| 71 | void receivedImage(const QPixmap pixmap, const QString& url); |
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| 72 | |||
| 73 | /*! |
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| 74 | * This method is called by MapNetwork, after all images in its queue were loaded. |
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| 75 | * The ImageManager emits a signal, which is used in MapControl to remove the zoom image. |
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| 76 | * The zoom image should be removed on Tile Images with transparency. |
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| 77 | * Else the zoom image stay visible behind the newly loaded tiles. |
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| 78 | */ |
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| 79 | void loadingQueueEmpty(); |
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| 80 | |||
| 81 | /*! |
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| 82 | * Aborts all current loading threads. |
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| 83 | * This is useful when changing the zoom-factor, though newly needed images loads faster |
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| 84 | */ |
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| 85 | void abortLoading(); |
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| 86 | |||
| 87 | //! sets the proxy for HTTP connections |
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| 88 | /*! |
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| 89 | * This method sets the proxy for HTTP connections. |
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| 90 | * This is not provided by the current Qtopia version! |
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| 91 | * @param host the proxy´s hostname or ip |
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| 92 | * @param port the proxy´s port |
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| 93 | */ |
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| 94 | void setProxy(QString host, int port); |
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| 95 | |||
| 96 | //! sets the cache directory for persistently saving map tiles |
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| 97 | /*! |
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| 98 | * |
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| 99 | * @param path the path where map tiles should be stored |
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| 100 | * @todo add maximum size |
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| 101 | */ |
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| 102 | void setCacheDir(const QDir& path); |
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| 103 | |||
| 104 | private: |
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| 105 | ImageManager(QObject* parent = 0); |
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| 106 | ImageManager(const ImageManager&); |
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| 107 | ImageManager& operator=(const ImageManager&); |
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| 108 | QPixmap emptyPixmap; |
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| 109 | MapNetwork* net; |
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| 110 | QVector<QString> prefetch; |
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| 111 | QDir cacheDir; |
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| 112 | bool doPersistentCaching; |
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| 113 | |||
| 114 | static ImageManager* m_Instance; |
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| 115 | |||
| 116 | bool saveTile(QString tileName,QPixmap tileData); |
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| 117 | bool loadTile(QString tileName,QPixmap &tileData); |
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| 118 | bool tileExist(QString tileName); |
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| 119 | |||
| 120 | signals: |
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| 121 | void imageReceived(); |
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| 122 | void loadingFinished(); |
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| 123 | }; |
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| 124 | } |
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| 125 | #endif |