theme classes

1 files changed, 162 insertions, 0 deletions

diff --git a/src/FbTk/Theme.hh b/src/FbTk/Theme.hh
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+// Theme.hh for FbTk - Fluxbox ToolKit
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen at linuxmail.org)
+//
+// 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 1.1 2002/12/02 19:34:51 fluxgen Exp $
+
+// holds ThemeItem, Theme and ThemeManager
+
+
+#include <string>
+#include <list>
+#include <string>
+
+#include "../XrmDatabaseHelper.hh"
+
+namespace FbTk {
+
+class Theme;
+/**
+   base class for themeitem, holds name and altname
+ */
+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() = 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 things like Texture and Color
+*/
+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
+    void load();
+    /**
+       @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; }
+    /**@}*/
+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);
+private:
+    const int m_screen_num;
+    typedef std::list<ThemeItem_base *> ItemList;
+    ItemList m_themeitems;
+};
+
+
+/**
+   singleton theme manager
+*/
+class ThemeManager {
+public:
+    static ThemeManager &instance();
+    bool load(const char *filename);
+    std::string resourceValue(const std::string &name, const std::string &altname);
+    void loadTheme(Theme &tm);
+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;
+    const int m_max_screens;
+    XrmDatabaseHelper m_database;
+};
+
+
+
+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);
+}
+
+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
+
+