1 files changed, 54 insertions, 0 deletions
diff --git a/android/src/com/mapswithme/maps/widget/ObservableLinearLayout.java b/android/src/com/mapswithme/maps/widget/ObservableLinearLayout.java
new file mode 100644
index 0000000000..d6f70dcefe
--- /dev/null
+++ b/android/src/com/mapswithme/maps/widget/ObservableLinearLayout.java
@@ -0,0 +1,54 @@
+package com.mapswithme.maps.widget;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.util.AttributeSet;
+import android.widget.LinearLayout;
+
+public class ObservableLinearLayout extends LinearLayout
+{
+  @Nullable
+  private SizeChangedListener mSizeChangedListener;
+
+  public ObservableLinearLayout(@NonNull Context context)
+  {
+    super(context);
+  }
+
+  public ObservableLinearLayout(@NonNull Context context, @Nullable AttributeSet attrs)
+  {
+    super(context, attrs);
+  }
+
+  public ObservableLinearLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr)
+  {
+    super(context, attrs, defStyleAttr);
+  }
+
+  @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+  public ObservableLinearLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes)
+  {
+    super(context, attrs, defStyleAttr, defStyleRes);
+  }
+
+  @Override
+  protected void onSizeChanged(int w, int h, int oldw, int oldh)
+  {
+    super.onSizeChanged(w, h, oldw, oldh);
+    if (mSizeChangedListener != null)
+      mSizeChangedListener.onSizeChanged(w, h, oldw, oldh);
+  }
+
+  public void setSizeChangedListener(@Nullable SizeChangedListener listener)
+  {
+    mSizeChangedListener = listener;
+  }
+
+  public interface SizeChangedListener
+  {
+    void onSizeChanged(int width, int height, int oldWidth, int oldHeight);
+  }
+}