libyui  3.0.10
/usr/src/RPM/BUILD/libyui-3.0.10/src/YUILoader.h
00001 /*
00002   Copyright (C) 2000-2012 Novell, Inc
00003   This library is free software; you can redistribute it and/or modify
00004   it under the terms of the GNU Lesser General Public License as
00005   published by the Free Software Foundation; either version 2.1 of the
00006   License, or (at your option) version 3.0 of the License. This library
00007   is distributed in the hope that it will be useful, but WITHOUT ANY
00008   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
00009   FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
00010   License for more details. You should have received a copy of the GNU
00011   Lesser General Public License along with this library; if not, write
00012   to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
00013   Floor, Boston, MA 02110-1301 USA
00014 */
00015 
00016 
00017 /*-/
00018 
00019   File:         YUILoader.h
00020 
00021   Author:       Stefan Hundhammer <sh@suse.de>
00022 
00023 /-*/
00024 
00025 
00026 #ifndef YUILoader_h
00027 #define YUILoader_h
00028 
00029 
00030 #include <string>
00031 
00032 #include "YUI.h"
00033 
00034 
00035 
00036 #define YUIPlugin_Qt            "qt"
00037 #define YUIPlugin_NCurses       "ncurses"
00038 #define YUIPlugin_Gtk           "gtk"
00039 
00040 
00041 /**
00042  * Class to load one of the concrete UI plug-ins: Qt, NCurses, Gtk.
00043  **/
00044 class YUILoader
00045 {
00046 public:
00047     /**
00048      * Load any of the available UI plug-ins in this order:
00049      * - Qt      if $DISPLAY is set
00050      * - NCurses if stdout is a tty
00051      **/
00052     static void loadUI( bool withThreads = false );
00053 
00054     /**
00055      * Load a UI plug-in. 'name' is one of the YUIPlugin_ -defines above.
00056      *
00057      * This might throw exceptions.
00058      **/
00059     static void loadPlugin( const std::string & name, bool withThreads = false );
00060 
00061     static bool pluginExists( const std::string & pluginBaseName );
00062 
00063 private:
00064     YUILoader()  {}
00065     ~YUILoader() {}
00066 };
00067 
00068 
00069 /**
00070  * Every UI plug-in has to provide a function
00071  *
00072  *     YUI * createUI( bool withThreads )
00073  *
00074  * that creates a UI of that specific type upon the first call and returns that
00075  * singleton for all subsequent calls.
00076  **/
00077 typedef YUI * (*createUIFunction_t)( bool );
00078 
00079 
00080 #endif // YUILoader_h
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