ui/views/controls/resize_area_delegate.h

   1 // Copyright (c) 2011 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_CONTROLS_RESIZE_AREA_DELEGATE_H_
   6 #define UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
   7
   8 namespace views {
   9
  10 // An interface implemented by objects that want to be notified about the resize
  11 // event.
  12 class ResizeAreaDelegate {
  13  public:
  14   // OnResize is sent when resizing is detected. |resize_amount| specifies the
  15   // number of pixels that the user wants to resize by, and can be negative or
  16   // positive (depending on direction of dragging and flips according to
  17   // locale directionality: dragging to the left in LTR locales gives negative
  18   // |resize_amount| but positive amount for RTL). |done_resizing| is true if
  19   // the user has released the mouse.
  20   virtual void OnResize(int resize_amount, bool done_resizing) = 0;
  21
  22  protected:
  23   virtual ~ResizeAreaDelegate() {}
  24 };
  25
  26 }  // namespace views
  27
  28 #endif  // UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_