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