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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_VIEWS_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_
      6 #define UI_VIEWS_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_
      7 
      8 #include <vector>
      9 
     10 #include "ui/views/window/frame_buttons.h"
     11 
     12 namespace views {
     13 
     14 // Observer interface to receive the ordering of the min,max,close buttons.
     15 class WindowButtonOrderObserver {
     16  public:
     17   // Called when first added to the LinuxUI class, or on a system-wide
     18   // configuration event.
     19   virtual void OnWindowButtonOrderingChange(
     20       const std::vector<views::FrameButton>& leading_buttons,
     21       const std::vector<views::FrameButton>& trailing_buttons) = 0;
     22 
     23  protected:
     24   virtual ~WindowButtonOrderObserver() {}
     25 };
     26 
     27 }  // namespace views
     28 
     29 #endif  // UI_VIEWS_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_
     30