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https://github.com/RetroShare/RetroShare.git
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b94e6f6386
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1031 b45a01b8-16f6-495d-af2f-9b41ad6348cc
128 lines
3.9 KiB
C++
128 lines
3.9 KiB
C++
#ifndef _PLUGIN_MANAGER_H_
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#define _PLUGIN_MANAGER_H_
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#include <QObject>
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#include <QString>
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#include <QStringList>
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#include <QList>
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#include <QPluginLoader>
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#include <QVector>
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class PluginInterface;
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class PluginManagerWidget;
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//! An engine for plugins management
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//! This class performs oaa plugin management operations: installing,
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//! loading, remowing. it also provides a PluginManagerWidget for controlling
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//! itself. I supose, a appication has to create a global instance of the class,
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//! so all pages (instances of the MainPage class) could receive plugin widgets.
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class PluginManager: public QObject
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{
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Q_OBJECT
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public:
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PluginManager();
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~PluginManager();
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//! Checks up 'plugins' folder for loadable plugins
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//! This is a separate method, becouse an application should create
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//! a PluginManager instance, then connect all its signals, optionally
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//! create a view widget, and only after all perform lookup
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void defaultLoad( ) ;
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//! GUI for the loader.
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//! Returns a PluginManagerWidget instance. When called for the first time,
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//! creates a new object; after that returns pointer to the same instance.
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//! After the instance was deleteted (it could be safely done in usual way)
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//! may create a new one.
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QWidget* getViewWidget(QWidget* parent = 0);
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//! Loads a widget of the plugin with given name
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//! Loads a new copy (called twice will return different objects) of the
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//! plugin widget. If there is no plugin with given name, returns 0 (also
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//! emits errorAppeared(..) with an error description).
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//! PluginManager provides ablolutely no control over returned widget;
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//! the application should delete it, like all other widgets
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QWidget* pluginWidget(QString pluginName);
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//! returns last error appeared;
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//! Sorry, doesn't work in current implementation
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QString getLastError();
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public slots:
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//! processes the desctucrion of the view widget;
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void viewWidgetDestroyed(QObject * obj = 0);
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//! processes the plugin installation request
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//! After successful installatio a newPluginRegistered(..) signal will be
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//! emitted. On some error -- errorAppeared(..) will be emitted;
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//! 'Installation' means that plgin file (dll or so) will be checked and
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//! copied to the 'plugins' directory. Later, in pluginWidget(..) call this
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//! copy will be used
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void installPlugin(QString fileName);
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//! Processes plugin remove request
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//! 'Remove' means that plugin file (so or dll) will be physically deleted
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//! from 'plugins' folder.
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void removePlugin(QString pluginName);
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signals:
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//! PluginManager emits this signal on every error;
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//! This signal is connected to the PluginManagerWidget::acceptErrorMessage.
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//! So, all error messages will appear on the view widget (only if that one
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//! was created, of course)
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void errorAppeared(QString errorDescription);
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//! Is emitted after plugin removing;
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//! Already loaded plugin widgets, will not be deleted. Nobody will touch
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//! them
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void pluginRemoveCompleted(QString pluginName);
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//! Is emitted for every loadable plugin
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void newPluginRegistered(QString pluginName);
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protected:
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PluginManagerWidget* viewWidget;
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QStringList fileNames;
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QStringList names;
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QString baseFolder;
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QString lastError;
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//! Reads information from plugin file
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//! The function tries to read the info from the plugin file (in current
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//! implementation only pluginName).
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//! \returns 0 on success, error code (>0) on fail
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int readPluginInformation( QString fileName, QString& pluginName);
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//! ---
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//! Adds plugin name and plugin filename to the lists, emits nesessary
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//! signals, updates the view widget
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void acceptPlugin( QString fileName, QString pluginName);
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PluginInterface* loadPluginInterface(QString fileName ) ;
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};
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#endif
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