src/ui/app_list/views/contents_switcher_view.cc

   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/views/contents_view.h"
   8 #include "ui/base/resource/resource_bundle.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 kButtonSpacing = 4;
  18 const int kMinimumHeight = 40;
  19
  20 }  // namespace
  21
  22 ContentsSwitcherView::ContentsSwitcherView(ContentsView* contents_view)
  23     : contents_view_(contents_view) {
  24   views::BoxLayout* layout = new views::BoxLayout(
  25       views::BoxLayout::kHorizontal, 0, 0, kButtonSpacing);
  26   layout->set_main_axis_alignment(views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
  27   layout->set_minimum_cross_axis_size(kMinimumHeight);
  28   SetLayoutManager(layout);
  29 }
  30
  31 ContentsSwitcherView::~ContentsSwitcherView() {}
  32
  33 void ContentsSwitcherView::AddSwitcherButton(int resource_id, int page_index) {
  34   views::ImageButton* button = new views::ImageButton(this);
  35   button->SetMinimumImageSize(gfx::Size(kMinimumHeight, kMinimumHeight));
  36   button->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
  37                             views::ImageButton::ALIGN_MIDDLE);
  38   button->SetImage(
  39       views::CustomButton::STATE_NORMAL,
  40       ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id));
  41   button->set_tag(page_index);
  42
  43   AddChildView(button);
  44 }
  45
  46 void ContentsSwitcherView::ButtonPressed(views::Button* sender,
  47                                          const ui::Event& event) {
  48   contents_view_->SetActivePage(sender->tag());
  49 }
  50
  51 void ContentsSwitcherView::TotalPagesChanged() {
  52 }
  53
  54 void ContentsSwitcherView::SelectedPageChanged(int old_selected,
  55                                                int new_selected) {
  56   // TODO(mgiuca): Visually indicate which page is now selected.
  57 }
  58
  59 void ContentsSwitcherView::TransitionStarted() {
  60 }
  61
  62 void ContentsSwitcherView::TransitionChanged() {
  63   // Change the indicator during a launcher page transition.
  64   const PaginationModel& pm = contents_view_->pagination_model();
  65   int old_selected = pm.selected_page();
  66   int new_selected = pm.transition().target_page;
  67   if (pm.IsRevertingCurrentTransition()) {
  68     // Swap the direction if the transition is reversed.
  69     old_selected = pm.transition().target_page;
  70     new_selected = pm.selected_page();
  71   }
  72
  73   SelectedPageChanged(old_selected, new_selected);
  74 }
  75
  76 }  // namespace app_list