From b05cbc7df24019efd9b2d1dae046c4cf6eed2390 Mon Sep 17 00:00:00 2001
From: Björn Steinbrink <B.Steinbrink@gmx.de>
Date: Sun, 28 Aug 2005 17:41:05 +0000
Subject: Create a static ConfigListener for the Window class.

---
 ChangeLog          |  4 ++++
 src/gui/window.cpp | 54 +++++++++++++++++++++++++++++++++---------------------
 src/gui/window.h   | 17 ++++++++++-------
 3 files changed, 47 insertions(+), 28 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c5e261ed..eba647de 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,8 @@
 2005-08-27  Björn Steinbrink  <B.Steinbrink@gmx.de>
+
+	* src/gui/window.cpp, src/gui/window.h: Create a static ConfigListener
+	for the Window class. (Fixes each Window listening to config changes,
+	although they only affect a static class member.)
 	* src/gui/npc.cpp: Fix a memory leak.
 	* src/game.cpp, src/gui/npc.cpp, src/gui/npc.h: Fix the bug when
 	sometimes the last entry in npc list windows is missing. The network
diff --git a/src/gui/window.cpp b/src/gui/window.cpp
index 0fe941bc..acb23cd4 100644
--- a/src/gui/window.cpp
+++ b/src/gui/window.cpp
@@ -26,6 +26,7 @@
 #include "window.h"
 #include "windowcontainer.h"
 
+#include "../configlistener.h"
 #include "../configuration.h"
 #include "../graphics.h"
 #include "../log.h"
@@ -35,11 +36,35 @@
 #include "../resources/image.h"
 #include "../resources/resourcemanager.h"
 
+ConfigListener *Window::windowConfigListener = NULL;
 WindowContainer *Window::windowContainer = NULL;
 int Window::instances = 0;
 ImageRect Window::border;
 Image *Window::resizeGrip;
 
+class WindowConfigListener : public ConfigListener
+{
+    public:
+        /**
+         * Called when an config option changes.
+         */
+        void optionChanged(const std::string &name)
+        {
+            if (name == "guialpha")
+            {
+                float guiAlpha = config.getValue("guialpha", 0.8);
+
+                for (int i = 0; i < 9; i++)
+                {
+                    if (Window::border.grid[i]->getAlpha() != guiAlpha)
+                    {
+                        Window::border.grid[i]->setAlpha(guiAlpha);
+                    }
+                }
+            }
+        }
+};
+
 Window::Window(const std::string& caption, bool modal, Window *parent):
     gcn::Window(caption),
     parent(parent),
@@ -75,6 +100,10 @@ Window::Window(const std::string& caption, bool modal, Window *parent):
         border.grid[8] = dBorders->getSubImage(7, 15, 4, 4);
         resizeGrip = resman->getImage("graphics/gui/resize.png");
         dBorders->decRef();
+        windowConfigListener = new WindowConfigListener();
+        // Send GUI alpha changed for initialization
+        windowConfigListener->optionChanged("guialpha");
+        config.addListener("guialpha", windowConfigListener);
     }
 
     instances++;
@@ -91,10 +120,6 @@ Window::Window(const std::string& caption, bool modal, Window *parent):
     // Add this window to the window container
     windowContainer->add(this);
 
-    // Send GUI alpha changed for initialization
-    optionChanged("guialpha");
-    config.addListener("guialpha", this);
-
     if (modal)
     {
         requestModalFocus();
@@ -109,6 +134,10 @@ Window::~Window()
 
     if (instances == 0)
     {
+        config.removeListener("guialpha", windowConfigListener);
+        delete windowConfigListener;
+        windowConfigListener = NULL;
+
         // Clean up static resources
         delete border.grid[0];
         delete border.grid[1];
@@ -122,7 +151,6 @@ Window::~Window()
         resizeGrip->decRef();
     }
 
-    config.removeListener("guialpha", this);
     delete chrome;
 }
 
@@ -371,22 +399,6 @@ void Window::mouseRelease(int x, int y, int button)
     }
 }
 
-void Window::optionChanged(const std::string &name)
-{
-    if (name == "guialpha")
-    {
-        float guiAlpha = config.getValue("guialpha", 0.8);
-
-        for (int i = 0; i < 9; i++)
-        {
-            if (border.grid[i]->getAlpha() != guiAlpha)
-            {
-                border.grid[i]->setAlpha(guiAlpha);
-            }
-        }
-    }
-}
-
 gcn::Rectangle Window::getGripDimension ()
 {
     return gcn::Rectangle(getWidth() - resizeGrip->getWidth(), getHeight() - resizeGrip->getHeight(), getWidth(),
diff --git a/src/gui/window.h b/src/gui/window.h
index 18da6cdb..d8717f3c 100644
--- a/src/gui/window.h
+++ b/src/gui/window.h
@@ -27,11 +27,11 @@
 #include <guichan/widgets/window.hpp>
 #include <guichan/rectangle.hpp>
 
-#include "../configlistener.h"
 #include "../guichanfwd.h"
 
 #include "../resources/image.h"
 
+class ConfigListener;
 class ImageRect;
 class WindowContainer;
 
@@ -41,9 +41,11 @@ class WindowContainer;
  *
  * \ingroup GUI
  */
-class Window : public gcn::Window, public ConfigListener
+class Window : public gcn::Window
 {
     public:
+        friend class WindowConfigListener;
+
         /**
          * Constructor. Initializes the title to the given text and hooks
          * itself into the window container.
@@ -153,11 +155,6 @@ class Window : public gcn::Window, public ConfigListener
         void mouseMotion(int mx, int my);
         void mouseRelease(int x, int y, int button);
 
-        /**
-         * Called when an config option changes.
-         */
-        void optionChanged(const std::string &name);
-        
         /**
          * The position of the resize grip
          */
@@ -181,6 +178,12 @@ class Window : public gcn::Window, public ConfigListener
         /** The window container windows add themselves to. */
         static WindowContainer* windowContainer;
 
+        /**
+         * The config listener that listens to changes relevant to all
+         * windows
+         */
+        static ConfigListener *windowConfigListener;
+
         static int instances;      /**< Number of Window instances */
         static ImageRect border;   /**< The window border and background */
         static Image *resizeGrip;   /**< The grip to resize window */
-- 
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