// Theme.hh for FbTk - Fluxbox ToolKit // Copyright (c) 2002 - 2003 Henrik Kinnunen (fluxgen at users.sourceforge.net) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // $Id: Theme.hh,v 1.16 2004/04/26 15:04:37 rathnor Exp $ /** @file holds ThemeItem<T>, Theme and ThemeManager which is the base for any theme */ #ifndef FBTK_THEME_HH #define FBTK_THEME_HH #include <string> #include <list> #include <string> #include "XrmDatabaseHelper.hh" #include "Subject.hh" namespace FbTk { class Theme; /// Base class for ThemeItem, holds name and altname /** @see ThemeItem */ class ThemeItem_base { public: ThemeItem_base(const std::string &name, const std::string &altname): m_name(name), m_altname(altname) { } virtual ~ThemeItem_base() { } virtual void setFromString(const char *str) = 0; virtual void setDefaultValue() = 0; virtual void load(const std::string *name = 0, const std::string *altname = 0) = 0; // if it needs to load additional stuff const std::string &name() const { return m_name; } const std::string &altName() const { return m_altname; } private: std::string m_name, m_altname; }; /// template ThemeItem class for basic theme items /// to use this you need to specialize setDefaultValue, setFromString and load template <typename T> class ThemeItem:public ThemeItem_base { public: ThemeItem(FbTk::Theme &tm, const std::string &name, const std::string &altname); virtual ~ThemeItem(); /// specialized void setDefaultValue(); /// specialized void setFromString(const char *strval); /// specialized // name and altname may be different to the primary ones (e.g. from fallback) // if they are null, then the original name is used void load(const std::string *name = 0, const std::string *altname = 0); /** @name access operators */ /**@{*/ inline T& operator*() { return m_value; } inline const T& operator*() const { return m_value; } inline T *operator->() { return &m_value; } inline const T *operator->() const { return &m_value; } /**@}*/ FbTk::Theme &theme() { return m_tm; } private: T m_value; FbTk::Theme &m_tm; }; /// Hold ThemeItems. Use this to create a Theme set class Theme { public: explicit Theme(int screen_num); // create a theme for a specific screen virtual ~Theme(); virtual void reconfigTheme() = 0; int screenNum() const { return m_screen_num; } std::list<ThemeItem_base *> &itemList() { return m_themeitems; } const std::list<ThemeItem_base *> &itemList() const { return m_themeitems; } /// add ThemeItem template <typename T> void add(ThemeItem<T> &item); /// remove ThemeItem template <typename T> void remove(ThemeItem<T> &item); virtual bool fallback(ThemeItem_base &) { return false; } FbTk::Subject &reconfigSig() { return m_reconfig_sig; } const FbTk::Subject &reconfigSig() const { return m_reconfig_sig; } private: const int m_screen_num; typedef std::list<ThemeItem_base *> ItemList; ItemList m_themeitems; FbTk::Subject m_reconfig_sig; }; /// Singleton theme manager /** Use this to load all the registred themes */ class ThemeManager { public: static ThemeManager &instance(); /// load style file "filename" to screen bool load(const std::string &filename, int screen_num = -1); std::string resourceValue(const std::string &name, const std::string &altname); void loadTheme(Theme &tm); bool loadItem(ThemeItem_base &resource); bool loadItem(ThemeItem_base &resource, const std::string &name, const std::string &altname); bool verbose() const { return m_verbose; } void setVerbose(bool value) { m_verbose = value; } // void listItems(); private: ThemeManager(); ~ThemeManager() { } friend class FbTk::Theme; // so only theme can register itself in constructor /// @return false if screen_num if out of /// range or theme already registered, else true bool registerTheme(FbTk::Theme &tm); /// @return false if theme isn't registred in the manager bool unregisterTheme(FbTk::Theme &tm); /// map each theme manager to a screen typedef std::list<FbTk::Theme *> ThemeList; ThemeList m_themelist; int m_max_screens; XrmDatabaseHelper m_database; bool m_verbose; std::string m_themelocation; }; template <typename T> ThemeItem<T>::ThemeItem(FbTk::Theme &tm, const std::string &name, const std::string &altname): ThemeItem_base(name, altname), m_tm(tm) { tm.add(*this); setDefaultValue(); } template <typename T> ThemeItem<T>::~ThemeItem() { m_tm.remove(*this); } template <typename T> void Theme::add(ThemeItem<T> &item) { m_themeitems.push_back(&item); m_themeitems.unique(); } template <typename T> void Theme::remove(ThemeItem<T> &item) { m_themeitems.remove(&item); } } // end namespace FbTk #endif // FBTK_THEME_HH