/* ksim - a system monitor for kde * * Copyright (C) 2001 Robbie Ward * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef PLUGINLOADER_H #define PLUGINLOADER_H #include "pluginglobal.h" #include #include namespace KSim { class KDE_EXPORT PluginInfo { friend class PluginLoader; public: ~PluginInfo(); /** * @return the name of the plugin */ const TQString &name() const; /** * @return the library name of the plugin */ TQCString libName(bool includePrefix = false) const; /** * @return the location of the desktop file */ const TQString &location() const; private: PluginInfo(); TQString m_name; TQString m_location; TQCString m_libName; class Private; Private *d; }; /** * Provides a loader for the plugins * @author Robbie Ward */ class KDE_EXPORT PluginLoader : public TQObject { Q_OBJECT TQ_OBJECT friend class MainView; public: enum SearchType { Name = 0, DesktopFile, LibName }; enum ErrorCode { EmptyLibName = -3, LibNotFound = -2, UnSymbols = -1, LibLoaded = 0 }; /** * @return a reference to the instance */ static PluginLoader &self(); /** * loads a plugin, example: *
       *   KDesktopFile deskfile("/home/user/foo.desktop");
       *   KSim::PluginLoader::self().loadPlugin(deskFile);
       * 
* you can then use @ref pluginList() to access the plugin, view, * config page and plugin information * @param file is the desktop file of the lib * @return true if the plugin is successfully loaded */ bool loadPlugin(const KDesktopFile &file); /** * unloads a loaded plugin and removes plugin entries from pluginList() */ bool unloadPlugin(const TQCString &name); /** * unloads all loaded plugins */ void unloadAllPlugins(); /** * convenience function * * returns true if info is loaded */ bool isLoaded(const KSim::Plugin &info) const; /** * returns true if library is loaded */ bool isLoaded(const TQCString &library) const; /** * finds the plugins desktopfile and returns information * on the plugin * @return a KSim::PluginInfo object * @see KSim::PluginInfo */ KSim::PluginInfo findPluginInfo(const TQString &name, SearchType type = DesktopFile) const; /** * looks through the list of loaded plugins and returns * the one that matches libName, or returns * KSim::Plugin::null if a plugin could not be found. * * if libName does not start with "ksim_" then the function * will prepend this automatically. * @return a KSim::Plugin object * @see KSim::Plugin */ KSim::Plugin &tqfind(const TQCString &libName); /** * convenience function, see the above function for details. */ const KSim::Plugin &tqfind(const TQCString &libName) const; /** * equivalent to tqfind(info.libName()); */ KSim::Plugin &tqfind(const KSim::PluginInfo &info); /** * convenience function, see the above function for details. */ const KSim::Plugin &tqfind(const KSim::PluginInfo &info) const; /** * provides plugin(), view(), config page and plugin information * @see KSim::Plugin KSim::PluginList */ const KSim::PluginList &pluginList() const; /** * Overloaded member function, This behaves essentially like * the above function */ KSim::PluginList &pluginList(); /** * @return a reference to the last plugin loaded (or a null plugin * if the plugin was unable to load) */ const KSim::Plugin &plugin() const; /** * Overloaded member function, This behaves essentially like * the above function */ KSim::Plugin &plugin(); signals: void pluginLoaded(const KSim::Plugin &); protected: /** * constructor for PluginLoader, use self() to get an instance */ PluginLoader(); ~PluginLoader(); private: PluginLoader(const PluginLoader &); PluginLoader &operator=(const PluginLoader &); /** * Deletes the instance and cleans up after itself */ static void cleanup(); ErrorCode createPlugin(const KDesktopFile &file); class Private; Private *d; static PluginLoader *m_instance; }; } #endif