CustomButton cleanup: make protected members private, create accessors

ui/views/controls/scrollbar/kennedy_scroll_bar.cc

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/views/controls/scrollbar/kennedy_scroll_bar.h"
-
-#include "third_party/skia/include/core/SkColor.h"
-#include "third_party/skia/include/core/SkXfermode.h"
-#include "ui/gfx/canvas.h"
-#include "ui/views/background.h"
-#include "ui/views/border.h"
-#include "ui/views/controls/scrollbar/base_scroll_bar_thumb.h"
-
-namespace views {
-namespace {
-
-const int kScrollbarWidth = 10;
-const int kThumbMinimumSize = kScrollbarWidth * 2;
-const SkColor kBorderColor = SkColorSetARGB(32, 0, 0, 0);
-const SkColor kThumbHoverColor = SkColorSetARGB(128, 0, 0, 0);
-const SkColor kThumbDefaultColor = SkColorSetARGB(64, 0, 0, 0);
-const SkColor kTrackHoverColor = SkColorSetARGB(32, 0, 0, 0);
-
-class KennedyScrollBarThumb : public BaseScrollBarThumb {
- public:
-  explicit KennedyScrollBarThumb(BaseScrollBar* scroll_bar);
-  ~KennedyScrollBarThumb() override;
-
- protected:
-  // View overrides:
-  gfx::Size GetPreferredSize() const override;
-  void OnPaint(gfx::Canvas* canvas) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(KennedyScrollBarThumb);
-};
-
-KennedyScrollBarThumb::KennedyScrollBarThumb(BaseScrollBar* scroll_bar)
-    : BaseScrollBarThumb(scroll_bar) {
-}
-
-KennedyScrollBarThumb::~KennedyScrollBarThumb() {
-}
-
-gfx::Size KennedyScrollBarThumb::GetPreferredSize() const {
-  return gfx::Size(kThumbMinimumSize, kThumbMinimumSize);
-}
-
-void KennedyScrollBarThumb::OnPaint(gfx::Canvas* canvas) {
-  gfx::Rect local_bounds(GetLocalBounds());
-  canvas->FillRect(local_bounds,
-                   (GetState() == CustomButton::STATE_HOVERED ||
-                    GetState() == CustomButton::STATE_PRESSED) ?
-                   kThumbHoverColor : kThumbDefaultColor);
-  canvas->DrawRect(local_bounds, kBorderColor);
-}
-
-}  // namespace
-
-KennedyScrollBar::KennedyScrollBar(bool horizontal)
-    : BaseScrollBar(horizontal, new KennedyScrollBarThumb(this)) {
-  set_notify_enter_exit_on_child(true);
-}
-
-KennedyScrollBar::~KennedyScrollBar() {
-}
-
-gfx::Rect KennedyScrollBar::GetTrackBounds() const {
-  gfx::Rect local_bounds(GetLocalBounds());
-  gfx::Size track_size = local_bounds.size();
-  track_size.SetToMax(GetThumb()->size());
-  local_bounds.set_size(track_size);
-  return local_bounds;
-}
-
-int KennedyScrollBar::GetLayoutSize() const {
-  return kScrollbarWidth;
-}
-
-gfx::Size KennedyScrollBar::GetPreferredSize() const {
-  return GetTrackBounds().size();
-}
-
-void KennedyScrollBar::Layout() {
-  gfx::Rect thumb_bounds = GetTrackBounds();
-  BaseScrollBarThumb* thumb = GetThumb();
-  if (IsHorizontal()) {
-    thumb_bounds.set_x(thumb->x());
-    thumb_bounds.set_width(thumb->width());
-  } else {
-    thumb_bounds.set_y(thumb->y());
-    thumb_bounds.set_height(thumb->height());
-  }
-  thumb->SetBoundsRect(thumb_bounds);
-}
-
-void KennedyScrollBar::OnPaint(gfx::Canvas* canvas) {
-  CustomButton::ButtonState state = GetThumbTrackState();
-  if ((state == CustomButton::STATE_HOVERED) ||
-      (state == CustomButton::STATE_PRESSED)) {
-    gfx::Rect local_bounds(GetLocalBounds());
-    canvas->FillRect(local_bounds, kTrackHoverColor);
-    canvas->DrawRect(local_bounds, kBorderColor);
-  }
-}
-
-}  // namespace views