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