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00001 // Theme.hh for FbTk - Fluxbox ToolKit
00002 // Copyright (c) 2002 - 2003 Henrik Kinnunen (fluxgen at users.sourceforge.net)
00003 //
00004 // Permission is hereby granted, free of charge, to any person obtaining a
00005 // copy of this software and associated documentation files (the "Software"),
00006 // to deal in the Software without restriction, including without limitation
00007 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008 // and/or sell copies of the Software, and to permit persons to whom the
00009 // Software is furnished to do so, subject to the following conditions:
00010 //
00011 // The above copyright notice and this permission notice shall be included in
00012 // all copies or substantial portions of the Software.
00013 //
00014 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
00017 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
00019 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
00020 // DEALINGS IN THE SOFTWARE.
00021 
00022 // $Id: Theme.hh,v 1.15 2004/01/02 22:55:15 fluxgen Exp $
00023 
00028 #ifndef FBTK_THEME_HH
00029 #define FBTK_THEME_HH
00030 
00031 #include <string>
00032 #include <list>
00033 #include <string>
00034 
00035 #include "XrmDatabaseHelper.hh"
00036 #include "Subject.hh"
00037 
00038 namespace FbTk {
00039 
00040 class Theme;
00041 
00043 
00046 class ThemeItem_base {
00047 public:
00048     ThemeItem_base(const std::string &name, const std::string &altname):
00049         m_name(name), m_altname(altname) { }
00050     virtual ~ThemeItem_base() { }
00051     virtual void setFromString(const char *str) = 0;
00052     virtual void setDefaultValue() = 0;
00053     virtual void load() = 0; // if it needs to load additional stuff
00054     const std::string &name() const { return m_name; }
00055     const std::string &altName() const { return m_altname; }
00056 private:
00057     std::string m_name, m_altname;
00058 };
00059 
00060 
00063 template <typename T>
00064 class ThemeItem:public ThemeItem_base {
00065 public:
00066     ThemeItem(FbTk::Theme &tm, const std::string &name, const std::string &altname);
00067     virtual ~ThemeItem();
00069     void setDefaultValue(); 
00071     void setFromString(const char *strval);
00073     void load();
00078     inline T& operator*() { return m_value; }
00079     inline const T& operator*() const { return m_value; }
00080     inline T *operator->() { return &m_value; }
00081     inline const T *operator->() const { return &m_value; }
00084     FbTk::Theme &theme() { return m_tm; }
00085 private:
00086 
00087     T m_value;
00088     FbTk::Theme &m_tm;
00089 };
00090 
00091 
00093 class Theme {
00094 public:
00095     explicit Theme(int screen_num); // create a theme for a specific screen
00096     virtual ~Theme();
00097     virtual void reconfigTheme() = 0;
00098     int screenNum() const { return m_screen_num; }
00099     std::list<ThemeItem_base *> &itemList() { return m_themeitems; }
00100     const std::list<ThemeItem_base *> &itemList() const { return m_themeitems; }
00102     template <typename T>
00103     void add(ThemeItem<T> &item);
00105     template <typename T>
00106     void remove(ThemeItem<T> &item);
00107     virtual bool fallback(ThemeItem_base &) { return false; }
00108     FbTk::Subject &reconfigSig() { return m_reconfig_sig; }
00109     const FbTk::Subject &reconfigSig() const { return m_reconfig_sig; }
00110 
00111     
00112 private:
00113     const int m_screen_num;
00114     typedef std::list<ThemeItem_base *> ItemList;
00115     ItemList m_themeitems;
00116     FbTk::Subject m_reconfig_sig;
00117 };
00118 
00119 
00121 
00124 class ThemeManager {
00125 public:
00126     static ThemeManager &instance();
00128     bool load(const std::string &filename, int screen_num = -1);
00129     std::string resourceValue(const std::string &name, const std::string &altname);
00130     void loadTheme(Theme &tm);
00131     bool loadItem(ThemeItem_base &resource);
00132     bool loadItem(ThemeItem_base &resource, const std::string &name, const std::string &altname);
00133 
00134     bool verbose() const { return m_verbose; }
00135     void setVerbose(bool value) { m_verbose = value; }
00136     //    void listItems();
00137 private:
00138     ThemeManager();
00139     ~ThemeManager() { }
00140 
00141     friend class FbTk::Theme; // so only theme can register itself in constructor
00144     bool registerTheme(FbTk::Theme &tm); 
00146     bool unregisterTheme(FbTk::Theme &tm);
00148     typedef std::list<FbTk::Theme *> ThemeList;
00149     ThemeList m_themelist;
00150     int m_max_screens;
00151     XrmDatabaseHelper m_database;
00152     bool m_verbose;
00153 
00154     std::string m_themelocation;
00155 };
00156 
00157 
00158 
00159 template <typename T>
00160 ThemeItem<T>::ThemeItem(FbTk::Theme &tm, 
00161                         const std::string &name, const std::string &altname):
00162     ThemeItem_base(name, altname),
00163     m_tm(tm) {
00164     tm.add(*this);
00165     setDefaultValue();
00166 }
00167 
00168 template <typename T>
00169 ThemeItem<T>::~ThemeItem() {
00170     m_tm.remove(*this);
00171 }
00172 
00173 template <typename T>
00174 void Theme::add(ThemeItem<T> &item) {
00175     m_themeitems.push_back(&item);
00176     m_themeitems.unique();
00177 }
00178 
00179 template <typename T>
00180 void Theme::remove(ThemeItem<T> &item)  {
00181     m_themeitems.remove(&item);
00182 }
00183 
00184 } // end namespace FbTk
00185 
00186 #endif // FBTK_THEME_HH
00187
Theme.hh

Fluxbox CVS-Jan-2003
