third_party/WebKit/public/platform/WebScrollbarBehavior.h

   1 // Copyright 2014 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 WebScrollbarBehavior_h
   6 #define WebScrollbarBehavior_h
   7
   8 namespace blink {
   9
  10 struct WebPoint;
  11 struct WebRect;
  12
  13 class WebScrollbarBehavior {
  14 public:
  15     enum Button {
  16         ButtonNone = -1,
  17         ButtonLeft,
  18         ButtonMiddle,
  19         ButtonRight
  20     };
  21     virtual ~WebScrollbarBehavior() { }
  22     virtual bool shouldCenterOnThumb(Button, bool shiftKeyPressed, bool altKeyPressed) { return false; }
  23     virtual bool shouldSnapBackToDragOrigin(const WebPoint& eventPoint, const WebRect& scrollbarRect, bool isHorizontal) { return false; }
  24 };
  25
  26 } // namespace blink
  27
  28 #endif