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      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 #include "ui/app_list/views/contents_switcher_view.h"
      6 
      7 #include "ui/app_list/app_list_constants.h"
      8 #include "ui/app_list/views/contents_view.h"
      9 #include "ui/views/controls/button/custom_button.h"
     10 #include "ui/views/controls/button/image_button.h"
     11 #include "ui/views/layout/box_layout.h"
     12 
     13 namespace app_list {
     14 
     15 namespace {
     16 
     17 const int kPreferredHeight = 32;
     18 const int kButtonSpacing = 4;
     19 
     20 }  // namespace
     21 
     22 ContentsSwitcherView::ContentsSwitcherView(ContentsView* contents_view)
     23     : contents_view_(contents_view), buttons_(new views::View) {
     24   AddChildView(buttons_);
     25 
     26   buttons_->SetLayoutManager(new views::BoxLayout(
     27       views::BoxLayout::kHorizontal, 0, 0, kButtonSpacing));
     28 }
     29 
     30 ContentsSwitcherView::~ContentsSwitcherView() {}
     31 
     32 void ContentsSwitcherView::AddSwitcherButton(int resource_id, int page_index) {
     33   views::ImageButton* button = new views::ImageButton(this);
     34   if (resource_id) {
     35     button->SetImage(
     36         views::CustomButton::STATE_NORMAL,
     37         ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id));
     38   }
     39   button->set_tag(page_index);
     40   buttons_->AddChildView(button);
     41 }
     42 
     43 gfx::Size ContentsSwitcherView::GetPreferredSize() const {
     44   return gfx::Size(buttons_->GetPreferredSize().width(), kPreferredHeight);
     45 }
     46 
     47 void ContentsSwitcherView::Layout() {
     48   gfx::Rect rect(GetContentsBounds());
     49 
     50   // Makes |buttons_| horizontally center and vertically fill.
     51   gfx::Size buttons_size(buttons_->GetPreferredSize());
     52   gfx::Rect buttons_bounds(rect.CenterPoint().x() - buttons_size.width() / 2,
     53                            rect.y(),
     54                            buttons_size.width(),
     55                            rect.height());
     56   buttons_->SetBoundsRect(gfx::IntersectRects(rect, buttons_bounds));
     57 }
     58 
     59 void ContentsSwitcherView::ButtonPressed(views::Button* sender,
     60                                          const ui::Event& event) {
     61   contents_view_->SetActivePage(sender->tag());
     62 }
     63 
     64 }  // namespace app_list
     65