Move app list from ash to ui.

ash/app_list/page_switcher.cc

-// Copyright (c) 2012 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 "ash/app_list/page_switcher.h"
-
-#include "ash/app_list/pagination_model.h"
-#include "third_party/skia/include/core/SkPath.h"
-#include "ui/base/animation/throb_animation.h"
-#include "ui/gfx/canvas.h"
-#include "ui/views/controls/button/custom_button.h"
-#include "ui/views/layout/box_layout.h"
-
-namespace {
-
-const int kButtonSpacing = 10;
-const int kButtonWidth = 60;
-const int kButtonHeight = 6;
-const int kButtonHeightPadding = 10;
-const int kButtonCornerRadius = 2;
-
-// 0.16 black
-const SkColor kHoverColor = SkColorSetARGB(0x2A, 0x00, 0x00, 0x00);
-
-// 0.2 black
-const SkColor kNormalColor = SkColorSetARGB(0x33, 0x00, 0x00, 0x00);
-
-// 0.33 black
-const SkColor kSelectedColor = SkColorSetARGB(0x55, 0x00, 0x00, 0x00);
-
-class PageSwitcherButton : public views::CustomButton {
- public:
-  PageSwitcherButton(views::ButtonListener* listener)
-      : views::CustomButton(listener),
-        selected_(false) {
-  }
-  virtual ~PageSwitcherButton() {}
-
-  void SetSelected(bool selected) {
-    if (selected == selected_)
-      return;
-
-    selected_ = selected;
-    SchedulePaint();
-  }
-
-  // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
-    return gfx::Size(kButtonWidth, kButtonHeight + kButtonHeightPadding);
-  }
-
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
-    if (selected_ || state() == BS_PUSHED) {
-      PaintButton(canvas, kSelectedColor);
-    } else if (state() == BS_HOT) {
-      PaintButton(canvas, kHoverColor);
-    } else {
-      PaintButton(canvas, kNormalColor);
-    }
-  }
-
- private:
-  // Paints a button that has two rounded corner at bottom.
-  void PaintButton(gfx::Canvas* canvas, SkColor color) {
-    gfx::Rect rect(GetContentsBounds());
-    rect.set_height(kButtonHeight);
-
-    gfx::Point center = rect.CenterPoint();
-
-    SkPath path;
-    path.incReserve(12);
-    path.moveTo(SkIntToScalar(rect.x()), SkIntToScalar(rect.y()));
-    path.arcTo(SkIntToScalar(rect.x()), SkIntToScalar(rect.bottom()),
-               SkIntToScalar(center.x()), SkIntToScalar(rect.bottom()),
-               SkIntToScalar(kButtonCornerRadius));
-    path.arcTo(SkIntToScalar(rect.right()), SkIntToScalar(rect.bottom()),
-               SkIntToScalar(rect.right()), SkIntToScalar(rect.y()),
-               SkIntToScalar(kButtonCornerRadius));
-    path.lineTo(SkIntToScalar(rect.right()), SkIntToScalar(rect.y()));
-    path.close();
-
-    SkPaint paint;
-    paint.setStyle(SkPaint::kFill_Style);
-    paint.setColor(color);
-    canvas->DrawPath(path, paint);
-  }
-
-  bool selected_;
-
-  DISALLOW_COPY_AND_ASSIGN(PageSwitcherButton);
-};
-
-// Gets PageSwitcherButton at |index| in |buttons|.
-PageSwitcherButton* GetButtonByIndex(views::View* buttons, int index) {
-  return static_cast<PageSwitcherButton*>(buttons->child_at(index));
-}
-
-}  // namespace
-
-namespace ash {
-
-PageSwitcher::PageSwitcher(PaginationModel* model)
-    : model_(model),
-      buttons_(NULL) {
-  buttons_ = new views::View;
-  buttons_->SetLayoutManager(new views::BoxLayout(
-      views::BoxLayout::kHorizontal, 0, 0, kButtonSpacing));
-  AddChildView(buttons_);
-
-  TotalPagesChanged();
-  SelectedPageChanged(-1, model->selected_page());
-  model_->AddObserver(this);
-}
-
-PageSwitcher::~PageSwitcher() {
-  model_->RemoveObserver(this);
-}
-
-gfx::Size PageSwitcher::GetPreferredSize() {
-  // Always return a size with correct height so that container resize is not
-  // needed when more pages are added.
-  return gfx::Size(kButtonWidth, kButtonHeight + kButtonHeightPadding);
-}
-
-void PageSwitcher::Layout() {
-  gfx::Rect rect(GetContentsBounds());
-  buttons_->SetBoundsRect(rect.Center(buttons_->GetPreferredSize()));
-}
-
-void PageSwitcher::ButtonPressed(views::Button* sender,
-                                 const views::Event& event) {
-  for (int i = 0; i < buttons_->child_count(); ++i) {
-    if (sender == static_cast<views::Button*>(buttons_->child_at(i))) {
-      model_->SelectPage(i);
-      break;
-    }
-  }
-}
-
-void PageSwitcher::TotalPagesChanged() {
-  buttons_->RemoveAllChildViews(true);
-  for (int i = 0; i < model_->total_pages(); ++i) {
-    PageSwitcherButton* button = new PageSwitcherButton(this);
-    button->SetSelected(i == model_->selected_page());
-    buttons_->AddChildView(button);
-  }
-  buttons_->SetVisible(model_->total_pages() > 1);
-  Layout();
-}
-
-void PageSwitcher::SelectedPageChanged(int old_selected, int new_selected) {
-  if (old_selected >= 0 && old_selected < buttons_->child_count())
-    GetButtonByIndex(buttons_, old_selected)->SetSelected(false);
-  if (new_selected >= 0 && new_selected < buttons_->child_count())
-    GetButtonByIndex(buttons_, new_selected)->SetSelected(true);
-}
-
-}  // namespace ash