add a level of indirection to themes

4 files changed, 22 insertions, 4 deletions

diff --git a/src/FbTk/MenuTheme.hh b/src/FbTk/MenuTheme.hh
index d496f1e..017e4f3 100644
--- a/src/FbTk/MenuTheme.hh
+++ b/src/FbTk/MenuTheme.hh
@@ -33,7 +33,7 @@
 
 namespace FbTk {
 
-class MenuTheme:public Theme {
+class MenuTheme: public Theme, public ThemeProxy<MenuTheme> {
 public:
     //!! TODO
     // this isn't actually used with a theme item
@@ -140,6 +140,12 @@ public:
             m_hl_selected_pixmap->pixmap().dontFree();
     }
 
+    virtual Subject &reconfigSig() { return Theme::reconfigSig(); }
+    virtual const Subject &reconfigSig() const { return Theme::reconfigSig(); }
+
+    virtual MenuTheme *operator ->() { return this; }
+    virtual const MenuTheme *operator ->() const { return this; }
+
 private:
     ThemeItem<Color> t_text, f_text, h_text, d_text, u_text;
     ThemeItem<Texture> title, frame, hilite;
diff --git a/src/FbTk/TextTheme.cc b/src/FbTk/TextTheme.cc
index 848ee01..dad002e 100644
--- a/src/FbTk/TextTheme.cc
+++ b/src/FbTk/TextTheme.cc
@@ -38,10 +38,10 @@ TextTheme::TextTheme(Theme &theme,
     // set default values
     m_text_color->setFromString("white", theme.screenNum());
 
-    update();
+    updateTextColor();
 }
 
-void TextTheme::update() {
+void TextTheme::updateTextColor() {
     m_text_gc.setForeground(*m_text_color);
 }
 
diff --git a/src/FbTk/TextTheme.hh b/src/FbTk/TextTheme.hh
index ea22d4b..9a83788 100644
--- a/src/FbTk/TextTheme.hh
+++ b/src/FbTk/TextTheme.hh
@@ -36,7 +36,7 @@ public:
     TextTheme(Theme &theme, const std::string &name, const std::string &altname);
     virtual ~TextTheme() { }
 
-    void update();
+    void updateTextColor();
 
     Font &font() { return *m_font; }
     const Font &font() const { return *m_font; }
diff --git a/src/FbTk/Theme.hh b/src/FbTk/Theme.hh
index 159364e..1ae3387 100644
--- a/src/FbTk/Theme.hh
+++ b/src/FbTk/Theme.hh
@@ -118,6 +118,18 @@ private:
     FbTk::Subject m_reconfig_sig;
 };
 
+/// Proxy interface for themes, so they can be substituted dynamically
+template <class BaseTheme>
+class ThemeProxy {
+public:
+    virtual ~ThemeProxy() { }
+
+    virtual Subject &reconfigSig() = 0;
+    virtual const Subject &reconfigSig() const = 0;
+
+    virtual BaseTheme *operator ->() = 0;
+    virtual const BaseTheme *operator ->() const = 0;
+};
 
 /// Singleton theme manager
 /**