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      1 // Copyright (c) 2010 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 PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
      6 #define PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
      7 
      8 #include "ppapi/c/pp_stdint.h"
      9 #include "ppapi/cpp/instance_handle.h"
     10 
     11 namespace pp {
     12 
     13 class Instance;
     14 class Rect;
     15 class Scrollbar_Dev;
     16 class Widget_Dev;
     17 
     18 // This class provides a C++ interface for callbacks related to widgets. You
     19 // would normally use multiple inheritance to derive from this class in your
     20 // instance.
     21 class WidgetClient_Dev {
     22  public:
     23   explicit WidgetClient_Dev(Instance* instance);
     24   virtual ~WidgetClient_Dev();
     25 
     26   /**
     27    * Notification that the given widget should be repainted. This is the
     28    * implementation for PPP_Widget_Dev.
     29    */
     30   virtual void InvalidateWidget(Widget_Dev widget, const Rect& dirty_rect) = 0;
     31 
     32   /**
     33    * Notification that the given scrollbar should change value. This is the
     34    * implementation for PPP_Scrollbar_Dev.
     35    */
     36   virtual void ScrollbarValueChanged(Scrollbar_Dev scrollbar,
     37                                      uint32_t value) = 0;
     38 
     39   /**
     40    * Notification that the given scrollbar's overlay type has changed. This is
     41    * the implementation for PPP_Scrollbar_Dev.
     42    */
     43   virtual void ScrollbarOverlayChanged(Scrollbar_Dev scrollbar,
     44                                        bool type) = 0;
     45 
     46  private:
     47   InstanceHandle associated_instance_;
     48 };
     49 
     50 }  // namespace pp
     51 
     52 #endif  // PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
     53