cc/input/scrollbar.h

   1 // Copyright 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 CC_INPUT_SCROLLBAR_H_
   6 #define CC_INPUT_SCROLLBAR_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "ui/gfx/geometry/point.h"
  10 #include "ui/gfx/geometry/rect.h"
  11
  12 class SkCanvas;
  13
  14 namespace cc {
  15
  16 enum ScrollbarOrientation { HORIZONTAL, VERTICAL };
  17 enum ScrollDirection { SCROLL_BACKWARD, SCROLL_FORWARD };
  18 // For now, TRACK includes everything but the thumb including background and
  19 // buttons.
  20 enum ScrollbarPart { THUMB, TRACK };
  21
  22 class Scrollbar {
  23  public:
  24   virtual ~Scrollbar() {}
  25
  26   virtual ScrollbarOrientation Orientation() const = 0;
  27   virtual bool IsLeftSideVerticalScrollbar() const = 0;
  28   virtual gfx::Point Location() const = 0;
  29   virtual bool IsOverlay() const = 0;
  30   virtual bool HasThumb() const = 0;
  31   virtual int ThumbThickness() const = 0;
  32   virtual int ThumbLength() const = 0;
  33   virtual gfx::Rect TrackRect() const = 0;
  34   virtual void PaintPart(SkCanvas* canvas,
  35                          ScrollbarPart part,
  36                          const gfx::Rect& content_rect) = 0;
  37 };
  38
  39 }  // namespace cc
  40
  41 #endif  // CC_INPUT_SCROLLBAR_H_