diff --git a/core/res/ex-layout/main.xml b/core/res/ex-layout/main.xml
index 2e38ea4..1569c57 100644
--- a/core/res/ex-layout/main.xml
+++ b/core/res/ex-layout/main.xml
@@ -44,9 +44,21 @@
       src="@drawable/default_window_icon"
       text="OK"/>
 
+    <FrameLayout
+      width="256dp"
+      height="256dp"
+      background="#A00">
+      <Button
+        width="128dp"
+        height="128dp"
+        layoutGravity="center|bottom"
+        margin="10dp"/>
+    </FrameLayout>
+
     <CardLayout
       width="256dp"
       height="256dp"
+      marginBottom="90dp"
       radius="16dp">
 
       <View
diff --git a/core/src/br/nullexcept/mux/app/Application.java b/core/src/br/nullexcept/mux/app/Application.java
index e43e7f6..512db43 100644
--- a/core/src/br/nullexcept/mux/app/Application.java
+++ b/core/src/br/nullexcept/mux/app/Application.java
@@ -3,9 +3,13 @@
 import br.nullexcept.mux.app.base.Project;
 
 public class Application {
-    public static void initialize(Project project){
+    public static ApplicationRuntime initialize(Project project){
+        ApplicationRuntime[] app = new ApplicationRuntime[1];
         new Thread(()->{
-            new ApplicationRuntime(project).start();
+            app[0] = new ApplicationRuntime(project);
+            app[0].start();
         }).start();
+        while (app[0] == null) {Looper.sleep(0,100);}
+        return app[0];
     }
 }
diff --git a/core/src/br/nullexcept/mux/app/ApplicationRuntime.java b/core/src/br/nullexcept/mux/app/ApplicationRuntime.java
index e8fc9da..fa5b7ad 100644
--- a/core/src/br/nullexcept/mux/app/ApplicationRuntime.java
+++ b/core/src/br/nullexcept/mux/app/ApplicationRuntime.java
@@ -159,6 +159,14 @@ private void loop() {
         looper.postDelayed(this::loop, 0);
     }
 
+    public void destroy() {
+        looper.post(this::stop);
+    }
+
+    public boolean isRunning() {
+        return looper.isRunning();
+    }
+
     @Override
     public Resources getResources() {
         return resources;
diff --git a/core/src/br/nullexcept/mux/app/Looper.java b/core/src/br/nullexcept/mux/app/Looper.java
index 601b735..e611c8b 100644
--- a/core/src/br/nullexcept/mux/app/Looper.java
+++ b/core/src/br/nullexcept/mux/app/Looper.java
@@ -8,7 +8,7 @@ public class Looper {
     private final ArrayList<Callback> executions = new ArrayList<>();
     static Looper mainLooper;
     private boolean stop = false;
-
+    private boolean running = false;
 
     public static Looper getCurrentLooper() {
         Thread current = Thread.currentThread();
@@ -36,6 +36,17 @@ public void postDelayed(Runnable runnable, long msTime){
         }
     }
 
+    public void cancel(Runnable run) {
+        synchronized (executions) {
+            ArrayList<Callback> raw = new ArrayList<>(executions);
+            for (Callback callback: raw) {
+                if (callback.handle.equals(run)) {
+                    executions.remove(callback);
+                }
+            }
+        }
+    }
+
     public void post(Runnable runnable){
         postDelayed(runnable, 1);
     }
@@ -45,6 +56,7 @@ public void loop(){
         synchronized (activeLoops) {
             activeLoops.put(threadID, this);
         }
+        running = true;
         while (!stop) {
             Callback[] list;
             int i = 0;
@@ -65,6 +77,7 @@ public void loop(){
             }
             sleep(0, (int) (Math.random()*100));
         }
+        running = false;
         synchronized (activeLoops) {
             activeLoops.remove(threadID);
         }
@@ -84,6 +97,10 @@ public void stop(){
         this.stop = true;
     }
 
+    public boolean isRunning() {
+        return running;
+    }
+
     private static class Callback {
         private static long current;
         private final Runnable handle;
diff --git a/core/src/br/nullexcept/mux/widget/FrameLayout.java b/core/src/br/nullexcept/mux/widget/FrameLayout.java
index c4f2d93..457c772 100644
--- a/core/src/br/nullexcept/mux/widget/FrameLayout.java
+++ b/core/src/br/nullexcept/mux/widget/FrameLayout.java
@@ -2,6 +2,7 @@
 
 import br.nullexcept.mux.app.Context;
 import br.nullexcept.mux.graphics.Point;
+import br.nullexcept.mux.graphics.Size;
 import br.nullexcept.mux.res.AttributeList;
 import br.nullexcept.mux.view.Gravity;
 import br.nullexcept.mux.view.MarginLayoutParams;
@@ -24,11 +25,14 @@ protected Point getChildLocation(View view) {
         int w = getMeasuredWidth()-getPaddingLeft()-getPaddingRight();
         int h = getMeasuredHeight()-getPaddingTop()-getPaddingBottom();
 
-        int x = Gravity.apply(Gravity.horizontal(params.gravity), w, view.getMeasuredWidth());
-        int y = Gravity.apply(Gravity.vertical(params.gravity), h, view.getMeasuredHeight());
+        int cw = view.getMeasuredWidth() + params.getMarginLeft() + params.getMarginRight();
+        int ch = view.getMeasuredHeight() + params.getMarginTop() + params.getMarginTop();
 
-        x += params.getMarginLeft() - params.getMarginRight();
-        y += params.getMarginTop() - params.getMarginBottom();
+        int x = Gravity.apply(Gravity.horizontal(params.gravity), w, cw);
+        int y = Gravity.apply(Gravity.vertical(params.gravity), h, ch);
+
+        y += params.getMarginTop();
+        x += params.getMarginLeft();
 
         x += getPaddingLeft();
         y += getPaddingTop();
@@ -38,6 +42,19 @@ protected Point getChildLocation(View view) {
         return point;
     }
 
+    @Override
+    protected Size onMeasureContent(int parentWidth, int parentHeight) {
+        Size size = new Size();
+        for (View child: getChildren()){
+            LayoutParams params = (LayoutParams) child.getLayoutParams();
+            int x = Math.max(0, getChildLocation(child).x - getPaddingLeft());
+            size.width = Math.max(x + child.getMeasuredWidth() + params.getMarginRight(), size.width);
+            int y = Math.max(0, getChildLocation(child).y - getPaddingTop());
+            size.height = Math.max(y+child.getMeasuredHeight() + params.getMarginBottom(), size.height);
+        }
+        return size;
+    }
+
     @Override
     public void addChild(View view, ViewGroup.LayoutParams params) {
         if (params == null) {
diff --git a/core/src/br/nullexcept/mux/widget/LinearLayout.java b/core/src/br/nullexcept/mux/widget/LinearLayout.java
index fcd5a4d..8a7ad80 100644
--- a/core/src/br/nullexcept/mux/widget/LinearLayout.java
+++ b/core/src/br/nullexcept/mux/widget/LinearLayout.java
@@ -74,14 +74,16 @@ private Size measureVertical() {
             LayoutParams params = (LayoutParams) child.getLayoutParams();
             size.width  = Math.max(size.width, child.getMeasuredWidth() + params.getMarginLeft() + params.getMarginRight());
             size.height += child.getMeasuredHeight() + params.getMarginTop() + params.getMarginBottom();
-            if (i != getChildrenCount()) size.height += dividerSize;
+            if (i < getChildrenCount()-1) {
+                size.height += dividerSize;
+            }
         }
         return size;
     }
 
     @Override
     protected Size onMeasureContent(int parentWidth, int parentHeight) {
-        return super.onMeasureContent(parentWidth, parentHeight);
+        return orientation == ORIENTATION_VERTICAL ? measureVertical() : measureHorizontal();
     }
 
     private Point getChildLocationVertical(View view) {
@@ -111,8 +113,8 @@ private Point getChildLocationVertical(View view) {
         pos.x = posX + Gravity.apply(Gravity.horizontal(getGravity()),wrapSize.width,view.getMeasuredWidth());
         pos.x += params.getMarginLeft();
 
-        pos.y += getPaddingTop();
-        pos.x += getPaddingLeft();
+        pos.y += getPaddingTop() + params.getMarginTop();
+        pos.x += getPaddingLeft() + params.getMarginLeft();
 
         return pos;
     }
@@ -145,7 +147,7 @@ private Point getChildLocationHorizontal(View view) {
 
         pos.y = posY + Gravity.apply(Gravity.vertical(getGravity()),wrapSize.height,view.getMeasuredHeight());
         pos.y += params.getMarginTop() + getPaddingTop();
-        pos.x += getPaddingLeft();
+        pos.x += getPaddingLeft() + params.getMarginLeft();
 
         return pos;
     }