ash/shelf/app_list_button.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 "ash/shelf/app_list_button.h"
   6
   7 #include "ash/ash_constants.h"
   8 #include "ash/shelf/shelf_button.h"
   9 #include "ash/shelf/shelf_button_host.h"
  10 #include "ash/shelf/shelf_item_types.h"
  11 #include "ash/shelf/shelf_layout_manager.h"
  12 #include "ash/shelf/shelf_widget.h"
  13 #include "ash/shell.h"
  14 #include "base/command_line.h"
  15 #include "grit/ash_resources.h"
  16 #include "grit/ash_strings.h"
  17 #include "ui/accessibility/ax_view_state.h"
  18 #include "ui/app_list/app_list_switches.h"
  19 #include "ui/base/l10n/l10n_util.h"
  20 #include "ui/base/resource/resource_bundle.h"
  21 #include "ui/base/ui_base_switches_util.h"
  22 #include "ui/compositor/layer.h"
  23 #include "ui/compositor/layer_animation_element.h"
  24 #include "ui/compositor/layer_animation_sequence.h"
  25 #include "ui/compositor/scoped_layer_animation_settings.h"
  26 #include "ui/gfx/canvas.h"
  27 #include "ui/gfx/image/image_skia_operations.h"
  28 #include "ui/views/controls/button/image_button.h"
  29 #include "ui/views/painter.h"
  30
  31 namespace ash {
  32 // static
  33 const int AppListButton::kImageBoundsSize = 7;
  34
  35
  36 AppListButton::AppListButton(views::ButtonListener* listener,
  37                              ShelfButtonHost* host,
  38                              ShelfWidget* shelf_widget)
  39     : views::ImageButton(listener),
  40       draw_background_as_active_(false),
  41       host_(host),
  42       shelf_widget_(shelf_widget) {
  43   SetAccessibleName(
  44       app_list::switches::IsExperimentalAppListEnabled()
  45           ? l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE)
  46           : l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_TITLE));
  47   SetSize(gfx::Size(kShelfSize, kShelfSize));
  48   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
  49                       kFocusBorderColor, gfx::Insets(1, 1, 1, 1)));
  50 }
  51
  52 AppListButton::~AppListButton() {
  53 }
  54
  55 bool AppListButton::OnMousePressed(const ui::MouseEvent& event) {
  56   ImageButton::OnMousePressed(event);
  57   host_->PointerPressedOnButton(this, ShelfButtonHost::MOUSE, event);
  58   return true;
  59 }
  60
  61 void AppListButton::OnMouseReleased(const ui::MouseEvent& event) {
  62   ImageButton::OnMouseReleased(event);
  63   host_->PointerReleasedOnButton(this, ShelfButtonHost::MOUSE, false);
  64 }
  65
  66 void AppListButton::OnMouseCaptureLost() {
  67   host_->PointerReleasedOnButton(this, ShelfButtonHost::MOUSE, true);
  68   ImageButton::OnMouseCaptureLost();
  69 }
  70
  71 bool AppListButton::OnMouseDragged(const ui::MouseEvent& event) {
  72   ImageButton::OnMouseDragged(event);
  73   host_->PointerDraggedOnButton(this, ShelfButtonHost::MOUSE, event);
  74   return true;
  75 }
  76
  77 void AppListButton::OnMouseMoved(const ui::MouseEvent& event) {
  78   ImageButton::OnMouseMoved(event);
  79   host_->MouseMovedOverButton(this);
  80 }
  81
  82 void AppListButton::OnMouseEntered(const ui::MouseEvent& event) {
  83   ImageButton::OnMouseEntered(event);
  84   host_->MouseEnteredButton(this);
  85 }
  86
  87 void AppListButton::OnMouseExited(const ui::MouseEvent& event) {
  88   ImageButton::OnMouseExited(event);
  89   host_->MouseExitedButton(this);
  90 }
  91
  92 void AppListButton::OnGestureEvent(ui::GestureEvent* event) {
  93   switch (event->type()) {
  94    case ui::ET_GESTURE_SCROLL_BEGIN:
  95      if (switches::IsTouchFeedbackEnabled())
  96        SetDrawBackgroundAsActive(false);
  97      host_->PointerPressedOnButton(this, ShelfButtonHost::TOUCH, *event);
  98      event->SetHandled();
  99      return;
 100    case ui::ET_GESTURE_SCROLL_UPDATE:
 101      host_->PointerDraggedOnButton(this, ShelfButtonHost::TOUCH, *event);
 102      event->SetHandled();
 103      return;
 104    case ui::ET_GESTURE_SCROLL_END:
 105    case ui::ET_SCROLL_FLING_START:
 106      host_->PointerReleasedOnButton(this, ShelfButtonHost::TOUCH, false);
 107      event->SetHandled();
 108      return;
 109    case ui::ET_GESTURE_TAP_DOWN:
 110      if (switches::IsTouchFeedbackEnabled())
 111        SetDrawBackgroundAsActive(true);
 112      ImageButton::OnGestureEvent(event);
 113      break;
 114    case ui::ET_GESTURE_TAP_CANCEL:
 115    case ui::ET_GESTURE_TAP:
 116      if (switches::IsTouchFeedbackEnabled())
 117        SetDrawBackgroundAsActive(false);
 118      ImageButton::OnGestureEvent(event);
 119      break;
 120    default:
 121      ImageButton::OnGestureEvent(event);
 122      return;
 123   }
 124 }
 125
 126 void AppListButton::OnPaint(gfx::Canvas* canvas) {
 127   // Call the base class first to paint any background/borders.
 128   View::OnPaint(canvas);
 129
 130   int background_image_id = 0;
 131   if (Shell::GetInstance()->GetAppListTargetVisibility() ||
 132       draw_background_as_active_) {
 133     background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_PRESSED;
 134   } else {
 135     if (shelf_widget_->GetDimsShelf())
 136       background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_ON_BLACK;
 137     else
 138       background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_NORMAL;
 139   }
 140   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
 141   const gfx::ImageSkia* background_image =
 142       rb.GetImageNamed(background_image_id).ToImageSkia();
 143   const gfx::ImageSkia* forground_image =
 144       rb.GetImageNamed(IDR_ASH_SHELF_ICON_APPLIST).ToImageSkia();
 145
 146   gfx::Rect contents_bounds = GetContentsBounds();
 147   gfx::Rect background_bounds, forground_bounds;
 148
 149   ShelfAlignment alignment = shelf_widget_->GetAlignment();
 150   background_bounds.set_size(background_image->size());
 151   if (alignment == SHELF_ALIGNMENT_LEFT) {
 152     background_bounds.set_x(contents_bounds.width() -
 153         ShelfLayoutManager::kShelfItemInset - background_image->width());
 154     background_bounds.set_y(contents_bounds.y() +
 155         (contents_bounds.height() - background_image->height()) / 2);
 156   } else if(alignment == SHELF_ALIGNMENT_RIGHT) {
 157     background_bounds.set_x(ShelfLayoutManager::kShelfItemInset);
 158     background_bounds.set_y(contents_bounds.y() +
 159         (contents_bounds.height() - background_image->height()) / 2);
 160   } else {
 161     background_bounds.set_y(ShelfLayoutManager::kShelfItemInset);
 162     background_bounds.set_x(contents_bounds.x() +
 163         (contents_bounds.width() - background_image->width()) / 2);
 164   }
 165
 166   forground_bounds.set_size(forground_image->size());
 167   forground_bounds.set_x(background_bounds.x() +
 168       std::max(0,
 169           (background_bounds.width() - forground_bounds.width()) / 2));
 170   forground_bounds.set_y(background_bounds.y() +
 171       std::max(0,
 172           (background_bounds.height() - forground_bounds.height()) / 2));
 173
 174   canvas->DrawImageInt(*background_image,
 175                        background_bounds.x(),
 176                        background_bounds.y());
 177   canvas->DrawImageInt(*forground_image,
 178                        forground_bounds.x(),
 179                        forground_bounds.y());
 180
 181   views::Painter::PaintFocusPainter(this, canvas, focus_painter());
 182 }
 183
 184 void AppListButton::GetAccessibleState(ui::AXViewState* state) {
 185   state->role = ui::AX_ROLE_BUTTON;
 186   state->name = host_->GetAccessibleName(this);
 187 }
 188
 189 void AppListButton::SetDrawBackgroundAsActive(
 190     bool draw_background_as_active) {
 191   if (draw_background_as_active_ == draw_background_as_active)
 192     return;
 193   draw_background_as_active_ = draw_background_as_active;
 194   SchedulePaint();
 195 }
 196
 197 }  // namespace ash