diff --git a/data/layout.xml b/data/layout.xml
index 62376d7..7870803 100644
--- a/data/layout.xml
+++ b/data/layout.xml
@@ -24,14 +24,14 @@
   </layout>
   <layout id="main">
     <node dir="col" wrap="0" width="100%" height="100%" pad="5">
-      <border margin="0 0 5 0" pad="0 0 0 5" color=".3" width="100%" height="25" dir="row" align="center">
-        <text text="File" font-face="arial" font-size="11" margin="0 15 0 0"/>
-        <text text="Edit" font-face="arial" font-size="11" margin="0 15 0 0"/>
-        <text text="View" font-face="arial" font-size="11" margin="0 15 0 0"/>
+      <border margin="0 0 5 0" pad="3 0 3 3" color=".3" width="100%" height="25" dir="row" align="center">
+        <button height="100%" margin="0 5 0 0" text="File"/>
+        <button height="100%" margin="0 5 0 0" text="Edit"/>
+        <button height="100%" margin="0 5 0 0" text="View"/>
       </border>
       <!-- toolbar -->
       <border height="50" width="100%" pad="5" dir="row" color=".2">
-        <button width="50" height="100%" margin="0 5 0 0" text="Button" color=".1" thickness="2" border-color=".5"/>
+        <button id="btn-close" width="50" height="100%" margin="0 5 0 0" text="Button" color=".1" thickness="2" border-color=".5"/>
         <ref id="multi-button"/>
         <ref id="multi-button"/>
         <ref id="multi-button"/>
@@ -48,7 +48,7 @@
             <text text="atlas" font-face="arial" font-size="11"/>
           </image>
         </border>
-        <border width="70" margin="0 5 0 0" color=".2" thickness="2" border-color=".7">
+        <border width="60" pad="2" margin="0 5 0 0" color=".2" thickness="2" border-color=".7">
           <image path="data/social.png" region="0 0 230 230" width="100%" height="100%" pad="5" align="center" justify="flex-end">
             <text text="Facebook" font-face="arial" font-size="11"/>
           </image>
diff --git a/engine/app.cpp b/engine/app.cpp
index 223bedd..42ffedf 100644
--- a/engine/app.cpp
+++ b/engine/app.cpp
@@ -124,7 +124,10 @@ void App::init()
     FontManager::load(kFont::Arial_30, ttf, 30);
 
     layout.load("data/layout.xml");
-    //layout["main"].update(width, height);
+    if (auto* button = layout[main_id].find<NodeButton>("btn-close"))
+    {
+        button->on_click = [] { exit(0); };
+    }
 
     sampler.create(GL_NEAREST);
     ShaderManager::create(kShader::Texture, shader_v, shader_f);
@@ -164,8 +167,6 @@ void App::init()
 
 void App::update(float dt)
 {
-    constexpr auto main_id = const_hash("main");
-
     glClearColor(.1f, .1f, .1f, 1.f);
     glViewport(0, 0, (GLsizei)width, (GLsizei)height);
     glClear(GL_COLOR_BUFFER_BIT);
@@ -173,13 +174,10 @@ void App::update(float dt)
     if (layout.reload())
     {
         layout[main_id].update(width, height);
-        //Node* check = layout[main_id].find("check");
-        //if (check)
-        //    check->m_display = false;
     }
 
     glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-    //glEnable(GL_SCISSOR_TEST);
+    glEnable(GL_SCISSOR_TEST);
     for (auto& n : layout[main_id])
     {
         if (n.m_display)
@@ -190,32 +188,6 @@ void App::update(float dt)
         }
     }
     glDisable(GL_SCISSOR_TEST); 
-
-    glm::mat4 proj = glm::ortho(0.f, width, height, 0.f, -1.f, 1.f);
-    glm::mat4 tran = glm::translate(glm::vec3(200, 200, 0));
-
-/*
-    static int i = 0;
-    i = (i + 1) % 32;
-    auto c = chars["hgfrr56789opk0876ryuewighfcuisdbn"[i] - 32];
-    glm::vec2 a(c.x0, c.y0);
-    glm::vec2 b(c.x1, c.y1);
-    glm::vec2 s(512, 512);
-    glm::vec2 tof = a / s;
-    glm::vec2 tsz = (b - a) / s;
-
-    glActiveTexture(GL_TEXTURE0);
-    font_tex.bind();
-    sampler.bind(0);
-    ShaderManager::use(kShader::Font);
-    ShaderManager::u_int(kShaderUniform::Tex, 0);
-    ShaderManager::u_mat4(kShaderUniform::MVP, proj * tran);
-    ShaderManager::u_vec2(kShaderUniform::Tof, tof);
-    ShaderManager::u_vec2(kShaderUniform::Tsz, tsz);
-    //plane.draw_fill();
-    font_tex.unbind();
-    sampler.unbind();
- */
 }
 
 void App::resize(float w, float h)
@@ -228,7 +200,6 @@ void App::resize(float w, float h)
 
 void App::mouse_down(int button, float x, float y)
 {
-    constexpr auto main_id = const_hash("main");
     MouseEvent e;
     e.m_type = kEventType::MouseDownL;
     e.m_pos = { x, y };
@@ -237,7 +208,6 @@ void App::mouse_down(int button, float x, float y)
 }
 void App::mouse_move(float x, float y)
 {
-    constexpr auto main_id = const_hash("main");
     MouseEvent e;
     e.m_type = kEventType::MouseMove;
     e.m_pos = { x, y };
@@ -245,7 +215,6 @@ void App::mouse_move(float x, float y)
 }
 void App::mouse_up(int button, float x, float y)
 {
-    constexpr auto main_id = const_hash("main");
     MouseEvent e;
     e.m_type = kEventType::MouseUpL;
     e.m_pos = { x, y };
diff --git a/engine/app.h b/engine/app.h
index 23b82c0..35c3986 100644
--- a/engine/app.h
+++ b/engine/app.h
@@ -11,6 +11,7 @@ class App
     Sampler sampler;
     Texture2D tex;
     LayoutManager layout;
+    const uint16_t main_id = const_hash("main");
 public:
     static App I;
     float width;
diff --git a/engine/layout.cpp b/engine/layout.cpp
index 2e57da1..6f63df9 100644
--- a/engine/layout.cpp
+++ b/engine/layout.cpp
@@ -6,17 +6,6 @@ Plane NodeBorder::m_plane;
 Plane NodeImage::m_plane;
 Sampler NodeImage::m_sampler;
 
-Node* Node::find(const char* ids)
-{
-    uint16_t id = const_hash(ids);
-    if (id == m_nodeID)
-        return this;
-    for (auto& c : *this)
-        if (c.m_nodeID == id)
-            return &c;
-    return nullptr;
-}
-
 kEventResult Node::on_event(Event* e)
 {
     for (auto& c : m_children)
diff --git a/engine/layout.h b/engine/layout.h
index c63cea8..a97d49e 100644
--- a/engine/layout.h
+++ b/engine/layout.h
@@ -194,7 +194,18 @@ public:
     Node* clone();
     virtual Node* clone_instantiate() const;
     virtual void clone_copy(Node* dest) const;
-    Node* find(const char* ids);
+
+    template<class T> T* find(const char* ids)
+    {
+        uint16_t id = const_hash(ids);
+        if (id == m_nodeID)
+            return static_cast<T*>(this);
+        for (auto& c : *this)
+            if (c.m_nodeID == id)
+                return static_cast<T*>(&c);
+        return nullptr;
+    }
+
     kEventResult on_event(Event* e);
     virtual kEventResult handle_event(Event* e) { return kEventResult::Available; }
     virtual void create() { }
@@ -237,11 +248,11 @@ public:
 
 class NodeBorder : public Node
 {
+public:
     static Plane m_plane;
     glm::vec4 m_color;
     glm::vec4 m_border_color;
     float m_thinkness{ 1 };
-public:
     static void static_init()
     {
         m_plane.create<1>(1, 1);
@@ -299,18 +310,6 @@ public:
         ShaderManager::u_vec4(kShaderUniform::Col, m_border_color);
         m_plane.draw_stroke();
     }
-    virtual kEventResult handle_event(Event* e) override
-    {
-        switch (e->m_type)
-        {
-        case kEventType::MouseEnter:
-            m_color = rand_color();
-            break;
-        default:
-            break;
-        }
-        return kEventResult::Consumed;
-    }
 };
 
 class NodeText : public Node
@@ -462,6 +461,10 @@ class NodeButton : public Node
 public:
     NodeBorder* m_border;
     NodeText* m_text;
+    glm::vec4 color_normal{ .1, .1, .1, 1 };
+    glm::vec4 color_hover{ .2, .2, .2, 1 };
+    glm::vec4 color_down{ .3, .3, .3, 1 };
+    std::function<void()> on_click;
     virtual Node* clone_instantiate() const override { return new NodeImage(); }
     virtual void clone_copy(Node* dest) const override
     {
@@ -514,6 +517,29 @@ public:
         m_border->draw();
         m_text->draw();
     }
+    virtual kEventResult handle_event(Event* e) override
+    {
+        switch (e->m_type)
+        {
+        case kEventType::MouseEnter:
+            m_border->m_color = color_hover;
+            break;
+        case kEventType::MouseLeave:
+            m_border->m_color = color_normal;
+            break;
+        case kEventType::MouseDownL:
+            m_border->m_color = color_down;
+            break;
+        case kEventType::MouseUpL:
+            m_border->m_color = color_normal;
+            if (m_mouse_inside && on_click != nullptr)
+                on_click();
+            break;
+        default:
+            break;
+        }
+        return kEventResult::Consumed;
+    }
 };
 
 class LayoutManager
diff --git a/engine/pch.h b/engine/pch.h
index fa437cb..8531e49 100644
--- a/engine/pch.h
+++ b/engine/pch.h
@@ -20,6 +20,8 @@
 #include <string>
 #include <vector>
 #include <iostream>
+#include <algorithm>
+#include <functional>
 
 #define GLM_FORCE_RADIANS
 #define GLM_FORCE_SWIZZLE