diff --git a/modules/core/core.otmod b/modules/core/core.otmod
index 7a0a1201..57a52e66 100644
--- a/modules/core/core.otmod
+++ b/modules/core/core.otmod
@@ -18,5 +18,6 @@ Module
     require 'ui'
     require 'gfx'
     require 'messagebox/messagebox'
+    require 'tooltip/tooltip'
     return true
 
diff --git a/modules/core/tooltip/tooltip.lua b/modules/core/tooltip/tooltip.lua
new file mode 100644
index 00000000..b263fff4
--- /dev/null
+++ b/modules/core/tooltip/tooltip.lua
@@ -0,0 +1,40 @@
+ToolTip = {}
+
+-- private variables
+local currentToolTip
+
+-- private functions
+local function moveToolTip(tooltip)
+  local pos = getMouseCursorPos()
+  pos.y = pos.y + 1
+  local xdif = getScreenSize().width - (pos.x + tooltip:getWidth())
+  if xdif < 2 then
+    pos.x = pos.x - tooltip:getWidth() - 3
+  else
+    pos.x = pos.x + 10
+  end
+  tooltip:moveTo(pos)
+end
+
+-- public functions
+function ToolTip.display(text)
+  ToolTip.hide()
+  if text then
+    currentToolTip = UI.loadAndDisplay('/core/tooltip/tooltip.otui', UI.root)
+    currentToolTip.onMouseMove = moveToolTip
+    local label = currentToolTip:getChildById('toolTipText')
+    label:setText(text)
+    label:resizeToText()
+    local size = label:getSize()
+    size.width = size.width + 4
+    size.height = size.height + 4
+    currentToolTip:setSize(size)
+  end
+end
+
+function ToolTip.hide()
+  if currentToolTip then
+    currentToolTip:destroy()
+    currentToolTip = nil
+  end
+end
diff --git a/modules/core/tooltip/tooltip.otui b/modules/core/tooltip/tooltip.otui
new file mode 100644
index 00000000..12ce8874
--- /dev/null
+++ b/modules/core/tooltip/tooltip.otui
@@ -0,0 +1,9 @@
+RectPanel
+  background-color: #111111bb
+  size: 200 200
+  id: toolTip
+  focusable: false
+
+  Label
+    id: toolTipText
+    anchors.centerIn: parent
\ No newline at end of file
diff --git a/modules/core_styles/styles/buttons.otui b/modules/core_styles/styles/buttons.otui
index 4551809c..e1f005ef 100644
--- a/modules/core_styles/styles/buttons.otui
+++ b/modules/core_styles/styles/buttons.otui
@@ -23,7 +23,17 @@ Button < UIButton
     color: #999999
     background-color: #ffffff88
 
-TopButton < UIButton
+ToolTipButton < UIButton
+  onHoverChange: |
+    function(self, hovered)
+      if hovered then
+        ToolTip.display(self:getStyle().tooltip)
+      else
+        ToolTip:hide()
+      end
+    end
+
+TopButton < ToolTipButton
   background-color: white
   size: 26 25
   text-translate: 0 0
diff --git a/modules/topmenu/topmenu.otui b/modules/topmenu/topmenu.otui
index 7a0d0fca..540204ae 100644
--- a/modules/topmenu/topmenu.otui
+++ b/modules/topmenu/topmenu.otui
@@ -11,6 +11,7 @@ TopPanel
     anchors.left: parent.left
     margin.top: 4
     margin.left: 6
+    tooltip: Options
     onClick: Options.create()
 
     UIWidget
@@ -23,6 +24,7 @@ TopPanel
     anchors.top: prev.top
     anchors.left: prev.right
     margin.left: 6
+    tooltip: Enter game with a character
     onClick: |
       if Game.isOnline() then
         CharacterList.show()
@@ -41,6 +43,7 @@ TopPanel
     anchors.right: parent.right
     margin.top: 4
     margin.right: 6
+    tooltip: Logout
     onClick: |
       if Game.isOnline() then
         Game.logout(false)
@@ -59,6 +62,7 @@ TopPanel
     anchors.right: prev.left
     margin.top: 4
     margin.right: 6
+    tooltip: About OTClient
     onClick: About.create()
 
     UIWidget
diff --git a/src/framework/luascript/luabinder.h b/src/framework/luascript/luabinder.h
index 9ca5c82d..8a6796f0 100644
--- a/src/framework/luascript/luabinder.h
+++ b/src/framework/luascript/luabinder.h
@@ -186,6 +186,16 @@ namespace luabinder
                                     Tuple>(f);
     }
 
+    template<typename Obj, typename Ret, typename... Args, typename... Holders>
+    LuaCppFunction bind_fun(const std::_Bind<std::_Mem_fn<Ret (Obj::*)(Args...) const>(Obj*, Holders...)>& f) {
+        typedef typename std::tuple<Args...> ArgsTuple;
+        typedef typename std::tuple<Holders...> HoldersTuple;
+        typedef typename get_holded_tuple<void, sizeof...(Holders), ArgsTuple, HoldersTuple>::type Tuple;
+        return bind_fun_specializer<typename remove_const_ref<Ret>::type,
+                                    decltype(f),
+                                    Tuple>(f);
+    }
+
     /// Bind customized functions already bound by std::bind
     template<typename Obj>
     LuaCppFunction bind_fun(const std::_Bind<std::_Mem_fn<int (Obj::*)(LuaInterface*)>(Obj*, std::_Placeholder<1>)>& f) {
diff --git a/src/framework/luascript/luafunctions.cpp b/src/framework/luascript/luafunctions.cpp
index a8c85e10..7605b89b 100644
--- a/src/framework/luascript/luafunctions.cpp
+++ b/src/framework/luascript/luafunctions.cpp
@@ -26,6 +26,9 @@
 #include <framework/net/protocol.h>
 #include <framework/core/eventdispatcher.h>
 #include <framework/core/configs.h>
+#include <framework/platform/platform.h>
+#include <framework/otml/otml.h>
+#include <framework/graphics/graphics.h>
 
 void LuaInterface::registerFunctions()
 {
@@ -42,6 +45,10 @@ void LuaInterface::registerFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("setWidth", &UIWidget::setWidth);
     g_lua.bindClassMemberFunction<UIWidget>("getHeight", &UIWidget::getHeight);
     g_lua.bindClassMemberFunction<UIWidget>("setHeight", &UIWidget::setHeight);
+    g_lua.bindClassMemberFunction<UIWidget>("getSize", &UIWidget::getSize);
+    g_lua.bindClassMemberFunction<UIWidget>("setSize", &UIWidget::resize);
+    g_lua.bindClassMemberFunction<UIWidget>("getPosition", &UIWidget::getPosition);
+    g_lua.bindClassMemberFunction<UIWidget>("moveTo", &UIWidget::moveTo);
     g_lua.bindClassMemberFunction<UIWidget>("getParent", &UIWidget::getParent);
     g_lua.bindClassMemberFunction<UIWidget>("setParent", &UIWidget::setParent);
     g_lua.bindClassMemberFunction<UIWidget>("getBackgroundColor", &UIWidget::getBackgroundColor);
@@ -51,6 +58,7 @@ void LuaInterface::registerFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("getOpacity", &UIWidget::getOpacity);
     g_lua.bindClassMemberFunction<UIWidget>("setOpacity", &UIWidget::setOpacity);
     g_lua.bindClassMemberFunction<UIWidget>("setStyle", &UIWidget::setStyle);
+    g_lua.bindClassMemberFunction<UIWidget>("getStyle", &UIWidget::getStyle);
     g_lua.bindClassMemberFunction<UIWidget>("getMarginTop", &UIWidget::getMarginTop);
     g_lua.bindClassMemberFunction<UIWidget>("setMarginTop", &UIWidget::setMarginTop);
     g_lua.bindClassMemberFunction<UIWidget>("getMarginBottom", &UIWidget::getMarginBottom);
@@ -139,4 +147,6 @@ void LuaInterface::registerFunctions()
     g_lua.bindGlobalFunction("getRootWidget", std::bind(&UIManager::getRootWidget, &g_ui));
     g_lua.bindGlobalFunction("addEvent", std::bind(&EventDispatcher::addEvent, &g_dispatcher, _1, false));
     g_lua.bindGlobalFunction("scheduleEvent", std::bind(&EventDispatcher::scheduleEvent, &g_dispatcher, _1, _2));
+    g_lua.bindGlobalFunction("getMouseCursorPos", std::bind(&Platform::getMouseCursorPos, &g_platform));
+    g_lua.bindGlobalFunction("getScreenSize", std::bind(&Graphics::getScreenSize, &g_graphics));
 }
diff --git a/src/framework/luascript/luavaluecasts.cpp b/src/framework/luascript/luavaluecasts.cpp
index d759b060..a285bd8b 100644
--- a/src/framework/luascript/luavaluecasts.cpp
+++ b/src/framework/luascript/luavaluecasts.cpp
@@ -199,6 +199,33 @@ bool luavalue_cast(int index, Point& point)
     return true;
 }
 
+// size
+void push_luavalue(const Size& size)
+{
+    g_lua.newTable();
+    g_lua.pushInteger(size.width());
+    g_lua.setField("width");
+    g_lua.pushInteger(size.height());
+    g_lua.setField("height");
+}
+
+bool luavalue_cast(int index, Size& size)
+{
+    if(g_lua.isTable(index)) {
+        g_lua.getField("width", index);
+        size.setWidth(g_lua.popInteger());
+        g_lua.getField("height", index);
+        size.setHeight(g_lua.popInteger());
+        return true;
+    } else if(g_lua.isString()) {
+        return Fw::cast(g_lua.toString(index), size);
+    } else if(g_lua.isNil()) {
+        size = Size();
+        return true;
+    }
+    return true;
+}
+
 // otml nodes
 void push_luavalue(const OTMLNodePtr& node)
 {
diff --git a/src/framework/ui/uibutton.cpp b/src/framework/ui/uibutton.cpp
index 61e2212a..c0b9cb81 100644
--- a/src/framework/ui/uibutton.cpp
+++ b/src/framework/ui/uibutton.cpp
@@ -53,9 +53,6 @@ void UIButton::onStyleApply(const OTMLNodePtr& styleNode)
             m_textTranslate = node->value<Point>();
         } else if(node->tag() == "text") {
             m_text = node->value();
-        } else if(node->tag() == "onClick") {
-            g_lua.loadFunction(node->value(), "@" + node->source() + "[" + node->tag() + "]");
-            luaSetField(node->tag());
         }
     }
 }
diff --git a/src/framework/ui/uiverticallayout.cpp b/src/framework/ui/uiverticallayout.cpp
index 0e1963f7..69ab5944 100644
--- a/src/framework/ui/uiverticallayout.cpp
+++ b/src/framework/ui/uiverticallayout.cpp
@@ -57,7 +57,7 @@ void UIVerticalLayout::update()
 
 void UIVerticalLayout::addWidget(const UIWidgetPtr& widget)
 {
-    // needed to be correcly sorted on update
+    // needed to be correctly sorted on the following update
     widget->setY(9999);
     update();
 }
diff --git a/src/framework/ui/uiwidget.cpp b/src/framework/ui/uiwidget.cpp
index 8c07a5d7..c26b424b 100644
--- a/src/framework/ui/uiwidget.cpp
+++ b/src/framework/ui/uiwidget.cpp
@@ -841,6 +841,11 @@ void UIWidget::onStyleApply(const OTMLNodePtr& styleNode)
 
                 anchorLayout->addAnchor(asUIWidget(), anchoredEdge, hookedWidgetId, hookedEdge);
             }
+        } else if(node->tag() == "onClick" ||
+                  node->tag() == "onHoverChange") {
+            dump << node->tag();
+            g_lua.loadFunction(node->value(), "@" + node->source() + "[" + node->tag() + "]");
+            luaSetField(node->tag());
         }
     }
 }
@@ -858,6 +863,10 @@ void UIWidget::onFocusChange(bool focused, Fw::FocusReason reason)
 void UIWidget::onHoverChange(bool hovered)
 {
     callLuaField("onHoverChange", hovered);
+
+    // check for new hovered elements when the current widget is removed
+    if(!hovered && !getParent())
+        g_ui.getRootWidget()->updateState(Fw::HoverState);
 }
 
 bool UIWidget::onKeyPress(uchar keyCode, char keyChar, int keyboardModifiers)
diff --git a/src/framework/ui/uiwidget.h b/src/framework/ui/uiwidget.h
index 92105e56..409374b8 100644
--- a/src/framework/ui/uiwidget.h
+++ b/src/framework/ui/uiwidget.h
@@ -119,6 +119,7 @@ public:
     int getMarginTop() const { return m_marginTop; }
     int getMarginBottom() const { return m_marginBottom; }
     Fw::FocusReason getLastFocusReason() const { return m_lastFocusReason; }
+    OTMLNodePtr getStyle() const { return m_style; }
 
     UIWidgetList getChildren() const { return m_children; }
     UIWidgetPtr getFocusedChild() const { return m_focusedChild; }