6 files changed, 40 insertions, 17 deletions

diff --git a/src/Screen.cc b/src/Screen.cc
index 7c372bc..8809609 100644
--- a/src/Screen.cc
+++ b/src/Screen.cc
@@ -345,7 +345,6 @@ BScreen::BScreen(FbTk::ResourceManager &rm,
     m_focusedwindow_sig(*this), // focused window signal
     m_reconfigure_sig(*this), // reconfigure signal
     m_resize_sig(*this),
-    m_bg_change_sig(*this),
     m_layermanager(num_layers),
     m_focused_windowtheme(new FbWinFrameTheme(scrn, ".focus", ".Focus")),
     m_unfocused_windowtheme(new FbWinFrameTheme(scrn, ".unfocus", ".Unfocus")),
@@ -855,7 +854,7 @@ void BScreen::propertyNotify(Atom atom) {
         }
     // TODO: this doesn't belong in FbPixmap
     } else if (FbTk::FbPixmap::rootwinPropertyNotify(screenNumber(), atom))
-        m_bg_change_sig.notify();
+        m_bg_change_sig.emit(*this);
 }
 
 void BScreen::keyPressEvent(XKeyEvent &ke) {
diff --git a/src/Screen.hh b/src/Screen.hh
index 7bafead..00ab2e5 100644
--- a/src/Screen.hh
+++ b/src/Screen.hh
@@ -209,24 +209,25 @@ public:
        @name Screen signals
     */
     //@{
+    typedef FbTk::Signal<void, BScreen&> ScreenSignal;
     /// client list signal
     FbTk::Subject &clientListSig() { return m_clientlist_sig; }
     /// icon list sig
     FbTk::Subject &iconListSig() { return m_iconlist_sig; }
     /// workspace count signal
-    FbTk::Signal<void, BScreen&> &workspaceCountSig() { return m_workspacecount_sig; }
+    ScreenSignal &workspaceCountSig() { return m_workspacecount_sig; }
     /// workspace names signal
-    FbTk::Signal<void, BScreen&> &workspaceNamesSig() { return m_workspacenames_sig; }
+    ScreenSignal &workspaceNamesSig() { return m_workspacenames_sig; }
     /// workspace area signal
     FbTk::Subject &workspaceAreaSig() { return m_workspace_area_sig; }
     /// current workspace signal
-    FbTk::Signal<void, BScreen&> &currentWorkspaceSig() { return m_currentworkspace_sig; }
+    ScreenSignal &currentWorkspaceSig() { return m_currentworkspace_sig; }
     /// focused window signal
     FbTk::Subject &focusedWindowSig() { return m_focusedwindow_sig; }
     /// reconfigure signal
     FbTk::Subject &reconfigureSig() { return m_reconfigure_sig; }
     FbTk::Subject &resizeSig() { return m_resize_sig; }
-    FbTk::Subject &bgChangeSig() { return m_bg_change_sig; }
+    ScreenSignal &bgChangeSig() { return m_bg_change_sig; }
     //@}
 
     /// called when the screen receives a signal from a subject
@@ -494,16 +495,15 @@ private:
     ScreenSubject
     m_clientlist_sig,  ///< client signal
         m_iconlist_sig, ///< notify if a window gets iconified/deiconified
-
         m_workspace_area_sig, ///< workspace area changed signal
         m_focusedwindow_sig, ///< focused window signal
         m_reconfigure_sig, ///< reconfigure signal
-        m_resize_sig, ///< resize signal
-        m_bg_change_sig; ///< background change signal
+        m_resize_sig; ///< resize signal
 
-    FbTk::Signal<void, BScreen&> m_workspacecount_sig; ///< workspace count signal
-    FbTk::Signal<void, BScreen&> m_currentworkspace_sig; ///< current workspace signal
-    FbTk::Signal<void, BScreen&> m_workspacenames_sig; ///< workspace names signal
+    ScreenSignal m_bg_change_sig; ///< background change signal
+    ScreenSignal m_workspacecount_sig; ///< workspace count signal
+    ScreenSignal m_currentworkspace_sig; ///< current workspace signal
+    ScreenSignal m_workspacenames_sig; ///< workspace names signal
 
     FbTk::MultLayers m_layermanager;
 
diff --git a/src/Slit.cc b/src/Slit.cc
index 56e591e..6824bde 100644
--- a/src/Slit.cc
+++ b/src/Slit.cc
@@ -41,6 +41,8 @@
 #include "FbTk/Theme.hh"
 #include "FbTk/Transparent.hh"
 #include "FbTk/MacroCommand.hh"
+#include "FbTk/MemFun.hh"
+
 #include "FbCommands.hh"
 #include "Layer.hh"
 #include "LayerMenu.hh"
@@ -264,7 +266,10 @@ Slit::Slit(BScreen &scr, FbTk::XLayer &layer, const char *filename)
     // attach to theme and root window change signal
     theme().reconfigSig().attach(this);
     scr.resizeSig().attach(this);
-    scr.bgChangeSig().attach(this);
+
+    join(scr.bgChangeSig(),
+         FbTk::MemFun(*this, &Slit::updateForScreen));
+
     scr.reconfigureSig().attach(this); // if alpha changed (we disablethis signal when we get theme change sig)
 
     scr.addConfigMenu(_FB_XTEXT(Slit, Slit, "Slit", "The Slit"), m_slitmenu);
@@ -1048,6 +1053,10 @@ void Slit::exposeEvent(XExposeEvent &ev) {
     frame.window.clearArea(ev.x, ev.y, ev.width, ev.height);
 }
 
+void Slit::updateForScreen(BScreen &screen) {
+    reconfigure();
+}
+
 void Slit::update(FbTk::Subject *subj) {
     reconfigure();
 #ifdef XINERAMA
diff --git a/src/Slit.hh b/src/Slit.hh
index 19e4698..e1bcc5e 100644
--- a/src/Slit.hh
+++ b/src/Slit.hh
@@ -38,6 +38,7 @@
 #include "FbTk/Timer.hh"
 #include "FbTk/Resource.hh"
 #include "FbTk/XLayerItem.hh"
+#include "FbTk/Signal.hh"
 
 #include <X11/Xutil.h>
 
@@ -51,7 +52,9 @@ class Strut;
 class Layer;
 
 /// Handles dock apps
-class Slit: public FbTk::EventHandler, public FbTk::Observer, public LayerObject {
+class Slit: public FbTk::EventHandler, public FbTk::Observer,
+            public LayerObject, private FbTk::SignalTracker
+{
 public:
     typedef std::list<SlitClient *> SlitClients;
     /**
@@ -129,6 +132,9 @@ public:
     const SlitClients &clients() const { return m_client_list; }
     SlitClients &clients() { return m_client_list; }
 private:
+    /// Called when screen has changed
+    void updateForScreen(BScreen &screen);
+
     void updateAlpha();
     void clearWindow();
     void setupMenu();
diff --git a/src/SystemTray.cc b/src/SystemTray.cc
index 699ca47..0c3e550 100644
--- a/src/SystemTray.cc
+++ b/src/SystemTray.cc
@@ -24,6 +24,7 @@
 #include "FbTk/EventManager.hh"
 #include "FbTk/ImageControl.hh"
 #include "FbTk/TextUtils.hh"
+#include "FbTk/MemFun.hh"
 
 #include "AtomHandler.hh"
 #include "fluxbox.hh"
@@ -170,7 +171,10 @@ SystemTray::SystemTray(const FbTk::FbWindow& parent,
     // setup signals
     m_observer.reset(makeObserver(*this, &SystemTray::update));
     m_theme->reconfigSig().attach(m_observer.get());
-    screen.bgChangeSig().attach(m_observer.get());
+
+    join(screen.bgChangeSig(),
+         FbTk::MemFun(*this, &SystemTray::updateForScreen));
+
 
     Fluxbox* fluxbox = Fluxbox::instance();
     Display *disp = fluxbox->display();
diff --git a/src/SystemTray.hh b/src/SystemTray.hh
index 132069a..c67e08a 100644
--- a/src/SystemTray.hh
+++ b/src/SystemTray.hh
@@ -25,6 +25,7 @@
 
 #include "FbTk/FbWindow.hh"
 #include "FbTk/EventHandler.hh"
+#include "FbTk/Signal.hh"
 
 #include "ToolTheme.hh"
 #include "ToolbarItem.hh"
@@ -42,7 +43,8 @@ template <class T> class ThemeProxy;
 class Observer;
 }
 
-class SystemTray: public ToolbarItem, public FbTk::EventHandler {
+class SystemTray: public ToolbarItem, public FbTk::EventHandler,
+                  private FbTk::SignalTracker {
 public:
 
     explicit SystemTray(const FbTk::FbWindow &parent,
@@ -85,7 +87,10 @@ public:
     static Atom getXEmbedInfoAtom();
 
 private:
-
+    /// Called when an update for a screen is needed.
+    void updateForScreen(BScreen &screen) {
+        update();
+    }
     void update();
 
     typedef std::list<TrayWindow *> ClientList;