Add AttributeListener.

18 files changed, 377 insertions, 195 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 20500cdcb..2e94548ef 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -603,6 +603,9 @@ SET(SRCS
     being/actorsprite.cpp
     being/actorsprite.h
     listeners/actorspritelistener.h
+    listeners/attributelistener.cpp
+    listeners/attributelistener.h
+    listeners/baselistener.hpp
     actormanager.cpp
     actormanager.h
     animatedsprite.cpp
diff --git a/src/Makefile.am b/src/Makefile.am
index 72a28fb0b..409847682 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -685,6 +685,9 @@ manaplus_SOURCES += gui/widgets/avatarlistbox.cpp \
 	      being/actorsprite.cpp \
 	      being/actorsprite.h \
 	      listeners/actorspritelistener.h \
+	      listeners/attributelistener.cpp \
+	      listeners/attributelistener.h \
+	      listeners/baselistener.hpp \
 	      actormanager.cpp \
 	      actormanager.h \
 	      animatedsprite.cpp \
diff --git a/src/being/localplayer.cpp b/src/being/localplayer.cpp
index b75ee0ebd..ad26a15c2 100644
--- a/src/being/localplayer.cpp
+++ b/src/being/localplayer.cpp
@@ -96,6 +96,7 @@ extern SkillDialog *skillDialog;
 
 LocalPlayer::LocalPlayer(const int id, const int subtype) :
     Being(id, PLAYER, subtype, nullptr),
+    AttributeListener(),
     mGMLevel(0),
     mInvertDirection(0),
     mCrazyMoveType(config.getIntValue("crazyMoveType")),
@@ -1029,33 +1030,7 @@ void LocalPlayer::processEvent(const Channels channel,
 {
     if (channel == CHANNEL_ATTRIBUTES)
     {
-        if (event.getName() == EVENT_UPDATEATTRIBUTE)
-        {
-            switch (event.getInt("id"))
-            {
-                case PlayerInfo::EXP:
-                {
-                    if (event.getInt("oldValue") > event.getInt("newValue"))
-                        break;
-
-                    const int change = event.getInt("newValue")
-                        - event.getInt("oldValue");
-
-                    if (change != 0)
-                    {
-                        // TRANSLATORS: get xp message
-                        addMessageToQueue(strprintf("%d %s", change, _("xp")));
-                    }
-                    break;
-                }
-                case PlayerInfo::LEVEL:
-                    mLevel = event.getInt("newValue");
-                    break;
-                default:
-                    break;
-            };
-        }
-        else if (event.getName() == EVENT_UPDATESTAT)
+        if (event.getName() == EVENT_UPDATESTAT)
         {
             if (!mShowJobExp)
                 return;
@@ -1107,6 +1082,33 @@ void LocalPlayer::processEvent(const Channels channel,
     }
 }
 
+void LocalPlayer::attributeChanged(const int id,
+                                   const int oldVal,
+                                   const int newVal)
+{
+    switch (id)
+    {
+        case PlayerInfo::EXP:
+        {
+            if (oldVal > newVal)
+                break;
+
+            const int change = newVal - oldVal;
+            if (change != 0)
+            {
+                // TRANSLATORS: get xp message
+                addMessageToQueue(strprintf("%d %s", change, _("xp")));
+            }
+            break;
+        }
+        case PlayerInfo::LEVEL:
+            mLevel = newVal;
+            break;
+        default:
+            break;
+    }
+}
+
 void LocalPlayer::moveTo(const int x, const int y)
 {
     setDestination(x, y);
diff --git a/src/being/localplayer.h b/src/being/localplayer.h
index 280e245cd..ecf118799 100644
--- a/src/being/localplayer.h
+++ b/src/being/localplayer.h
@@ -31,6 +31,7 @@
 
 #include "listeners/actionlistener.h"
 #include "listeners/actorspritelistener.h"
+#include "listeners/attributelistener.h"
 
 #include <vector>
 
@@ -66,7 +67,8 @@ enum
  */
 class LocalPlayer final : public Being,
                           public ActorSpriteListener,
-                          public DepricatedListener
+                          public DepricatedListener,
+                          public AttributeListener
 {
     public:
         /**
@@ -509,6 +511,10 @@ class LocalPlayer final : public Being,
         int getLastAttackY() const override final
         { return mTarget ? mTarget->getTileY() : mLastAttackY; }
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
     protected:
         void updateCoords() override final;
 
diff --git a/src/being/playerinfo.cpp b/src/being/playerinfo.cpp
index 12ce1e6d3..d7652abe0 100644
--- a/src/being/playerinfo.cpp
+++ b/src/being/playerinfo.cpp
@@ -58,11 +58,8 @@ std::set<int> mProtectedItems;
 
 void triggerAttr(const int id, const int old)
 {
-    DepricatedEvent event(EVENT_UPDATEATTRIBUTE);
-    event.setInt("id", id);
-    event.setInt("oldValue", old);
-    event.setInt("newValue", mData.mAttributes.find(id)->second);
-    DepricatedEvent::trigger(CHANNEL_ATTRIBUTES, event);
+    AttributeListener::distributeEvent(id, old,
+        mData.mAttributes.find(id)->second);
 }
 
 void triggerStat(const int id, const std::string &changed,
diff --git a/src/gui/windows/chatwindow.cpp b/src/gui/windows/chatwindow.cpp
index be2daf6a9..dbda471c4 100644
--- a/src/gui/windows/chatwindow.cpp
+++ b/src/gui/windows/chatwindow.cpp
@@ -156,6 +156,7 @@ ChatWindow::ChatWindow():
     Window(_("Chat"), false, nullptr, "chat.xml"),
     ActionListener(),
     KeyListener(),
+    AttributeListener(),
     mItemLinkHandler(new ItemLinkHandler),
     mChatTabs(new TabbedArea(this)),
     mChatInput(new ChatInput(this)),
@@ -964,34 +965,7 @@ void ChatWindow::processEvent(const Channels channel,
         if (!mShowBattleEvents)
             return;
 
-        if (event.getName() == EVENT_UPDATEATTRIBUTE)
-        {
-            switch (event.getInt("id"))
-            {
-                case PlayerInfo::EXP:
-                {
-                    if (event.getInt("oldValue") > event.getInt("newValue"))
-                        break;
-
-                    const int change = event.getInt("newValue")
-                        - event.getInt("oldValue");
-
-                    if (change != 0)
-                    {
-                        battleChatLog(std::string("+").append(toString(
-                            change)).append(" xp"));
-                    }
-                    break;
-                }
-                case PlayerInfo::LEVEL:
-                    battleChatLog(std::string("Level: ").append(toString(
-                        event.getInt("newValue"))));
-                    break;
-                default:
-                    break;
-            };
-        }
-        else if (event.getName() == EVENT_UPDATESTAT)
+        if (event.getName() == EVENT_UPDATESTAT)
         {
             if (!config.getBoolValue("showJobExp"))
                 return;
@@ -1018,6 +992,32 @@ void ChatWindow::processEvent(const Channels channel,
     }
 }
 
+void ChatWindow::attributeChanged(const int id,
+                                  const int oldVal,
+                                  const int newVal)
+{
+    switch (id)
+    {
+        case PlayerInfo::EXP:
+        {
+            if (oldVal > newVal)
+                break;
+            const int change = newVal - oldVal;
+            if (change != 0)
+            {
+                battleChatLog(std::string("+").append(toString(
+                    change)).append(" xp"));
+            }
+            break;
+        }
+        case PlayerInfo::LEVEL:
+            battleChatLog(std::string("Level: ").append(toString(newVal)));
+            break;
+        default:
+            break;
+    };
+}
+
 void ChatWindow::addInputText(const std::string &text, const bool space)
 {
     const int caretPos = mChatInput->getCaretPosition();
diff --git a/src/gui/windows/chatwindow.h b/src/gui/windows/chatwindow.h
index e755e43f2..d345b5abc 100644
--- a/src/gui/windows/chatwindow.h
+++ b/src/gui/windows/chatwindow.h
@@ -23,9 +23,9 @@
 #ifndef GUI_WINDOWS_CHATWINDOW_H
 #define GUI_WINDOWS_CHATWINDOW_H
 
-#include "listeners/depricatedlistener.h"
-
+#include "listeners/attributelistener.h"
 #include "listeners/configlistener.h"
+#include "listeners/depricatedlistener.h"
 
 #include "gui/widgets/window.h"
 
@@ -86,7 +86,8 @@ class ChatWindow final : public Window,
                          public ActionListener,
                          public KeyListener,
                          public DepricatedListener,
-                         public ConfigListener
+                         public ConfigListener,
+                         public AttributeListener
 {
     public:
         /**
@@ -294,6 +295,10 @@ class ChatWindow final : public Window,
 
         bool isTabPresent(const ChatTab *const tab) const A_WARN_UNUSED;
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
         static void localPetSay(const std::string &nick,
                                 const std::string &text);
 
diff --git a/src/gui/windows/inventorywindow.cpp b/src/gui/windows/inventorywindow.cpp
index 01e5e052d..2122fce2f 100644
--- a/src/gui/windows/inventorywindow.cpp
+++ b/src/gui/windows/inventorywindow.cpp
@@ -73,6 +73,7 @@ InventoryWindow::InventoryWindow(Inventory *const inventory):
     KeyListener(),
     SelectionListener(),
     InventoryListener(),
+    AttributeListener(),
     mInventory(inventory),
     mItems(new ItemContainer(this, mInventory)),
     mUseButton(nullptr),
@@ -131,8 +132,6 @@ InventoryWindow::InventoryWindow(Inventory *const inventory):
         mSortDropDown->setSelected(0);
     }
 
-    listen(CHANNEL_ATTRIBUTES);
-
     if (setupWindow)
         setupWindow->registerWindowForReset(this);
 
@@ -690,17 +689,6 @@ void InventoryWindow::close()
     }
 }
 
-void InventoryWindow::processEvent(const Channels channel A_UNUSED,
-                                   const DepricatedEvent &event)
-{
-    if (event.getName() == EVENT_UPDATEATTRIBUTE)
-    {
-        const int id = event.getInt("id");
-        if (id == PlayerInfo::TOTAL_WEIGHT || id == PlayerInfo::MAX_WEIGHT)
-            updateWeight();
-    }
-}
-
 void InventoryWindow::updateWeight()
 {
     if (!isMainInventory() || !mWeightBar)
@@ -821,3 +809,11 @@ void InventoryWindow::unsetInventory()
     }
     mInventory = nullptr;
 }
+
+void InventoryWindow::attributeChanged(const int id,
+                                       const int oldVal A_UNUSED,
+                                       const int newVal A_UNUSED)
+{
+    if (id == PlayerInfo::TOTAL_WEIGHT || id == PlayerInfo::MAX_WEIGHT)
+        updateWeight();
+}
diff --git a/src/gui/windows/inventorywindow.h b/src/gui/windows/inventorywindow.h
index 10e1e21e2..538d9a47d 100644
--- a/src/gui/windows/inventorywindow.h
+++ b/src/gui/windows/inventorywindow.h
@@ -25,11 +25,10 @@
 
 #include "inventory.h"
 
-#include "listeners/depricatedlistener.h"
-
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
+#include "listeners/attributelistener.h"
 #include "listeners/keylistener.h"
 #include "listeners/selectionlistener.h"
 
@@ -54,7 +53,7 @@ class InventoryWindow final : public Window,
                               public KeyListener,
                               public SelectionListener,
                               public InventoryListener,
-                              public DepricatedListener
+                              public AttributeListener
 {
     public:
         /**
@@ -137,9 +136,6 @@ class InventoryWindow final : public Window,
 
         void updateDropButton();
 
-        void processEvent(const Channels channel,
-                          const DepricatedEvent &event) override final;
-
         void updateButtons(const Item *item = nullptr);
 
         bool isInputFocused() const A_WARN_UNUSED;
@@ -154,6 +150,10 @@ class InventoryWindow final : public Window,
 
         void unsetInventory();
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
         static bool isAnyInputFocused();
 
     private:
diff --git a/src/gui/windows/killstats.cpp b/src/gui/windows/killstats.cpp
index 467d27524..832892fac 100644
--- a/src/gui/windows/killstats.cpp
+++ b/src/gui/windows/killstats.cpp
@@ -41,6 +41,7 @@ KillStats::KillStats() :
     // TRANSLATORS: kill stats window name
     Window(_("Kill stats"), false, nullptr, "killstats.xml"),
     ActionListener(),
+    AttributeListener(),
     mKillTimer(0),
     // TRANSLATORS: kill stats window button
     mResetButton(new Button(this, _("Reset stats"), "reset", this)),
@@ -108,7 +109,6 @@ KillStats::KillStats() :
     setStickyButtonLock(true);
     setDefaultSize(250, 250, 350, 300);
 
-    listen(CHANNEL_ATTRIBUTES);
     const int xp(PlayerInfo::getAttribute(PlayerInfo::EXP));
     int xpNextLevel(PlayerInfo::getAttribute(PlayerInfo::EXP_NEEDED));
 
@@ -489,18 +489,17 @@ void KillStats::validateJacko()
     }
 }
 
-void KillStats::processEvent(const Channels channel A_UNUSED,
-                             const DepricatedEvent &event)
+void KillStats::attributeChanged(const int id,
+                                 const int oldVal,
+                                 const int newVal)
 {
-    if (event.getName() == EVENT_UPDATEATTRIBUTE)
+    switch (id)
     {
-        const int id = event.getInt("id");
-        if (id == PlayerInfo::EXP || id == PlayerInfo::EXP_NEEDED)
-        {
-            gainXp(event.getInt("newValue") - event.getInt("oldValue"));
-        }
-        else if (id == PlayerInfo::LEVEL)
-        {
+        case PlayerInfo::EXP:
+        case PlayerInfo::EXP_NEEDED:
+            gainXp(newVal - oldVal);
+            break;
+        case PlayerInfo::LEVEL:
             mKillCounter = 0;
             mKillTCounter = 0;
             mExpCounter = 0;
@@ -520,6 +519,8 @@ void KillStats::processEvent(const Channels channel A_UNUSED,
                 _("Kills/Min: %s, Exp/Min: %s"), "?", "?"));
 
             resetTimes();
-        }
+            break;
+        default:
+            break;
     }
 }
diff --git a/src/gui/windows/killstats.h b/src/gui/windows/killstats.h
index 26e30e9eb..1e2da9ada 100644
--- a/src/gui/windows/killstats.h
+++ b/src/gui/windows/killstats.h
@@ -24,7 +24,7 @@
 #define GUI_WINDOWS_KILLSTATS_H
 
 #include "listeners/actionlistener.h"
-#include "listeners/depricatedlistener.h"
+#include "listeners/attributelistener.h"
 
 #include "gui/widgets/window.h"
 
@@ -32,8 +32,8 @@ class Label;
 class Button;
 
 class KillStats final : public Window,
-                        private ActionListener,
-                        public DepricatedListener
+                        public ActionListener,
+                        public AttributeListener
 {
     public:
         /**
@@ -75,11 +75,12 @@ class KillStats final : public Window,
 
         void jackoAlive(const int id);
 
-        void processEvent(const Channels channel A_UNUSED,
-                          const DepricatedEvent &event) override;
-
         void resetTimes();
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
     private:
         void validateJacko();
 
diff --git a/src/gui/windows/ministatuswindow.cpp b/src/gui/windows/ministatuswindow.cpp
index 93a6a6a10..6fb330bbf 100644
--- a/src/gui/windows/ministatuswindow.cpp
+++ b/src/gui/windows/ministatuswindow.cpp
@@ -55,6 +55,7 @@ typedef std::vector <ProgressBar*>::const_iterator ProgressBarVectorCIter;
 MiniStatusWindow::MiniStatusWindow() :
     Window("MiniStatus", false, nullptr, "ministatus.xml"),
     InventoryListener(),
+    AttributeListener(),
     mBars(),
     mBarNames(),
     mIcons(),
@@ -253,35 +254,40 @@ void MiniStatusWindow::drawIcons(Graphics *const graphics)
 void MiniStatusWindow::processEvent(const Channels channel A_UNUSED,
                                     const DepricatedEvent &event)
 {
-    if (event.getName() == EVENT_UPDATEATTRIBUTE)
+    if (event.getName() == EVENT_UPDATESTAT)
     {
-        const int id = event.getInt("id");
-        if (id == PlayerInfo::HP || id == PlayerInfo::MAX_HP)
-        {
+        statusWindow->updateMPBar(mMpBar);
+        StatusWindow::updateJobBar(mJobBar);
+    }
+}
+
+void MiniStatusWindow::attributeChanged(const int id,
+                                        const int oldVal A_UNUSED,
+                                        const int newVal A_UNUSED)
+{
+    switch (id)
+    {
+        case PlayerInfo::HP:
+        case PlayerInfo::MAX_HP:
             StatusWindow::updateHPBar(mHpBar);
-        }
-        else if (id == PlayerInfo::MP || id == PlayerInfo::MAX_MP)
-        {
+            break;
+        case PlayerInfo::MP:
+        case PlayerInfo::MAX_MP:
             statusWindow->updateMPBar(mMpBar);
-        }
-        else if (id == PlayerInfo::EXP || id == PlayerInfo::EXP_NEEDED)
-        {
+            break;
+        case PlayerInfo::EXP:
+        case PlayerInfo::EXP_NEEDED:
             StatusWindow::updateXPBar(mXpBar);
-        }
-        else if (id == PlayerInfo::TOTAL_WEIGHT
-                 || id == PlayerInfo::MAX_WEIGHT)
-        {
+            break;
+        case PlayerInfo::TOTAL_WEIGHT:
+        case PlayerInfo::MAX_WEIGHT:
             StatusWindow::updateWeightBar(mWeightBar);
-        }
-        else if (id == PlayerInfo::MONEY)
-        {
+            break;
+        case PlayerInfo::MONEY:
             StatusWindow::updateMoneyBar(mMoneyBar);
-        }
-    }
-    else if (event.getName() == EVENT_UPDATESTAT)
-    {
-        statusWindow->updateMPBar(mMpBar);
-        StatusWindow::updateJobBar(mJobBar);
+            break;
+        default:
+            break;
     }
 }
 
diff --git a/src/gui/windows/ministatuswindow.h b/src/gui/windows/ministatuswindow.h
index 6939f8f54..bab117c19 100644
--- a/src/gui/windows/ministatuswindow.h
+++ b/src/gui/windows/ministatuswindow.h
@@ -25,6 +25,7 @@
 
 #include "inventory.h"
 
+#include "listeners/attributelistener.h"
 #include "listeners/depricatedlistener.h"
 
 #include "gui/widgets/window.h"
@@ -44,7 +45,8 @@ class TextPopup;
  */
 class MiniStatusWindow final : public Window,
                                public InventoryListener,
-                               public DepricatedListener
+                               public DepricatedListener,
+                               public AttributeListener
 {
     public:
         MiniStatusWindow();
@@ -90,6 +92,10 @@ class MiniStatusWindow final : public Window,
 
         Rect getChildrenArea() override final A_WARN_UNUSED;
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
 #ifdef USE_PROFILER
         void logicChildren();
 #endif
diff --git a/src/gui/windows/statuswindow.cpp b/src/gui/windows/statuswindow.cpp
index 98d3ea82e..5897ae64b 100644
--- a/src/gui/windows/statuswindow.cpp
+++ b/src/gui/windows/statuswindow.cpp
@@ -144,6 +144,7 @@ StatusWindow::StatusWindow() :
     Window(player_node ? player_node->getName() :
         "?", false, nullptr, "status.xml"),
     ActionListener(),
+    AttributeListener(),
     // TRANSLATORS: status window label
     mLvlLabel(new Label(this, strprintf(_("Level: %d"), 0))),
     // TRANSLATORS: status window label
@@ -342,73 +343,7 @@ void StatusWindow::processEvent(const Channels channel A_UNUSED,
         return;
 
     const DepricatedEvents &eventName = event.getName();
-    if (eventName == EVENT_UPDATEATTRIBUTE)
-    {
-        switch (event.getInt("id"))
-        {
-            case PlayerInfo::HP:
-            case PlayerInfo::MAX_HP:
-                updateHPBar(mHpBar, true);
-                break;
-
-            case PlayerInfo::MP:
-            case PlayerInfo::MAX_MP:
-                updateMPBar(mMpBar, true);
-                break;
-
-            case PlayerInfo::EXP:
-            case PlayerInfo::EXP_NEEDED:
-                updateXPBar(mXpBar, false);
-                break;
-
-            case PlayerInfo::MONEY:
-                // TRANSLATORS: status window label
-                mMoneyLabel->setCaption(strprintf(_("Money: %s"),
-                    Units::formatCurrency(event.getInt("newValue")).c_str()));
-                mMoneyLabel->adjustSize();
-                break;
-
-            case PlayerInfo::CHAR_POINTS:
-                mCharacterPointsLabel->setCaption(strprintf(
-                    // TRANSLATORS: status window label
-                    _("Character points: %d"), event.getInt("newValue")));
-
-                mCharacterPointsLabel->adjustSize();
-                // Update all attributes
-                for (Attrs::const_iterator it = mAttrs.begin();
-                     it != mAttrs.end(); ++it)
-                {
-                    if (it->second)
-                        it->second->update();
-                }
-            break;
-
-            case PlayerInfo::CORR_POINTS:
-                mCorrectionPointsLabel->setCaption(strprintf(
-                    // TRANSLATORS: status window label
-                    _("Correction points: %d"), event.getInt("newValue")));
-                mCorrectionPointsLabel->adjustSize();
-                // Update all attributes
-                for (Attrs::const_iterator it = mAttrs.begin();
-                     it != mAttrs.end(); ++it)
-                {
-                    if (it->second)
-                        it->second->update();
-                }
-            break;
-
-            case PlayerInfo::LEVEL:
-                // TRANSLATORS: status window label
-                mLvlLabel->setCaption(strprintf(_("Level: %d"),
-                    event.getInt("newValue")));
-                mLvlLabel->adjustSize();
-            break;
-
-            default:
-                break;
-        }
-    }
-    else if (eventName == EVENT_UPDATESTAT)
+    if (eventName == EVENT_UPDATESTAT)
     {
         const int id = event.getInt("id");
         if (id == Net::getPlayerHandler()->getJobLocation())
@@ -465,6 +400,74 @@ void StatusWindow::processEvent(const Channels channel A_UNUSED,
     }
 }
 
+void StatusWindow::attributeChanged(const int id,
+                                    const int oldVal A_UNUSED,
+                                    const int newVal)
+{
+    switch (id)
+    {
+        case PlayerInfo::HP:
+        case PlayerInfo::MAX_HP:
+            updateHPBar(mHpBar, true);
+            break;
+
+        case PlayerInfo::MP:
+        case PlayerInfo::MAX_MP:
+            updateMPBar(mMpBar, true);
+            break;
+
+        case PlayerInfo::EXP:
+        case PlayerInfo::EXP_NEEDED:
+            updateXPBar(mXpBar, false);
+            break;
+
+        case PlayerInfo::MONEY:
+            // TRANSLATORS: status window label
+            mMoneyLabel->setCaption(strprintf(_("Money: %s"),
+                Units::formatCurrency(newVal).c_str()));
+            mMoneyLabel->adjustSize();
+            break;
+
+        case PlayerInfo::CHAR_POINTS:
+            mCharacterPointsLabel->setCaption(strprintf(
+                // TRANSLATORS: status window label
+                _("Character points: %d"), newVal));
+
+            mCharacterPointsLabel->adjustSize();
+            // Update all attributes
+            for (Attrs::const_iterator it = mAttrs.begin();
+                 it != mAttrs.end(); ++it)
+            {
+                if (it->second)
+                    it->second->update();
+            }
+            break;
+
+        case PlayerInfo::CORR_POINTS:
+            mCorrectionPointsLabel->setCaption(strprintf(
+                // TRANSLATORS: status window label
+                _("Correction points: %d"), newVal));
+            mCorrectionPointsLabel->adjustSize();
+            // Update all attributes
+            for (Attrs::const_iterator it = mAttrs.begin();
+                 it != mAttrs.end(); ++it)
+            {
+                if (it->second)
+                    it->second->update();
+            }
+            break;
+
+        case PlayerInfo::LEVEL:
+            // TRANSLATORS: status window label
+            mLvlLabel->setCaption(strprintf(_("Level: %d"), newVal));
+            mLvlLabel->adjustSize();
+            break;
+
+        default:
+            break;
+    }
+}
+
 void StatusWindow::setPointsNeeded(const int id, const int needed)
 {
     const Attrs::const_iterator it = mAttrs.find(id);
diff --git a/src/gui/windows/statuswindow.h b/src/gui/windows/statuswindow.h
index 35bba74cd..11aa2ad05 100644
--- a/src/gui/windows/statuswindow.h
+++ b/src/gui/windows/statuswindow.h
@@ -23,11 +23,11 @@
 #ifndef GUI_WINDOWS_STATUSWINDOW_H
 #define GUI_WINDOWS_STATUSWINDOW_H
 
-#include "listeners/depricatedlistener.h"
-
 #include "gui/widgets/window.h"
 
 #include "listeners/actionlistener.h"
+#include "listeners/attributelistener.h"
+#include "listeners/depricatedlistener.h"
 
 #include <map>
 
@@ -45,7 +45,8 @@ class VertContainer;
  */
 class StatusWindow final : public Window,
                            public ActionListener,
-                           public DepricatedListener
+                           public DepricatedListener,
+                           public AttributeListener
 {
     public:
         /**
@@ -87,6 +88,10 @@ class StatusWindow final : public Window,
 
         void clearAttributes();
 
+        void attributeChanged(const int id,
+                              const int oldVal,
+                              const int newVal) override final;
+
     private:
         static std::string translateLetter(const char *const letters);
         static std::string translateLetter2(std::string letters);
diff --git a/src/listeners/attributelistener.cpp b/src/listeners/attributelistener.cpp
new file mode 100644
index 000000000..b547cb219
--- /dev/null
+++ b/src/listeners/attributelistener.cpp
@@ -0,0 +1,61 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "listeners/attributelistener.h"
+
+#include "listeners/baselistener.hpp"
+
+#include "debug.h"
+
+std::vector<AttributeListener*> AttributeListener::mListeners;
+
+AttributeListener::AttributeListener()
+{
+    addListener(this);
+}
+
+AttributeListener::~AttributeListener()
+{
+    removeListener(this);
+}
+
+void AttributeListener::addListener(AttributeListener *const listener)
+{
+    mListeners.push_back(listener);
+}
+
+void AttributeListener::removeListener(AttributeListener *const listener)
+{
+    listenerRemoveListener;
+}
+
+void AttributeListener::distributeEvent(const int id,
+                                        const int oldVal,
+                                        const int newVal)
+{
+    FOR_EACH (std::vector<AttributeListener*>::iterator,
+              it, mListeners)
+    {
+        AttributeListener *const listener = *it;
+        if (listener)
+            listener->attributeChanged(id, oldVal, newVal);
+    }
+}
+
diff --git a/src/listeners/attributelistener.h b/src/listeners/attributelistener.h
new file mode 100644
index 000000000..83605ffe9
--- /dev/null
+++ b/src/listeners/attributelistener.h
@@ -0,0 +1,51 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LISTENERS_ATTRIBUTELISTENER_H
+#define LISTENERS_ATTRIBUTELISTENER_H
+
+#include <vector>
+
+#include "localconsts.h"
+
+class AttributeListener
+{
+    public:
+        AttributeListener();
+
+        virtual ~AttributeListener();
+
+        virtual void attributeChanged(const int id,
+                                      const int oldVal,
+                                      const int newVal) = 0;
+
+        static void addListener(AttributeListener *const listener);
+
+        static void removeListener(AttributeListener *const listener);
+
+        static void distributeEvent(const int id,
+                                    const int oldVal,
+                                    const int newVal);
+
+    private:
+        static std::vector<AttributeListener*> mListeners;
+};
+
+#endif  // LISTENERS_ATTRIBUTELISTENER_H
diff --git a/src/listeners/baselistener.hpp b/src/listeners/baselistener.hpp
new file mode 100644
index 000000000..ae3c7112e
--- /dev/null
+++ b/src/listeners/baselistener.hpp
@@ -0,0 +1,36 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2014  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LISTENERS_BASELISTENER_HPP
+#define LISTENERS_BASELISTENER_HPP
+
+#define listenerRemoveListener \
+    { \
+        std::vector<AttributeListener*>::iterator it = mListeners.begin(); \
+        while (it != mListeners.end()) \
+        { \
+            if (*it == listener) \
+                it = mListeners.erase(it); \
+            else \
+                ++ it; \
+        } \
+    }
+
+#endif  // LISTENERS_BASELISTENER_HPP