src/ui/message_center/views/message_view.cc

   1 // Copyright (c) 2012 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/message_center/views/message_view.h"
   6
   7 #include "grit/ui_resources.h"
   8 #include "grit/ui_strings.h"
   9 #include "ui/accessibility/ax_view_state.h"
  10 #include "ui/base/l10n/l10n_util.h"
  11 #include "ui/base/models/simple_menu_model.h"
  12 #include "ui/compositor/scoped_layer_animation_settings.h"
  13 #include "ui/gfx/canvas.h"
  14 #include "ui/gfx/image/image_skia_operations.h"
  15 #include "ui/message_center/message_center.h"
  16 #include "ui/message_center/message_center_style.h"
  17 #include "ui/message_center/views/padded_button.h"
  18 #include "ui/views/background.h"
  19 #include "ui/views/controls/button/image_button.h"
  20 #include "ui/views/controls/image_view.h"
  21 #include "ui/views/controls/scroll_view.h"
  22 #include "ui/views/focus/focus_manager.h"
  23 #include "ui/views/painter.h"
  24 #include "ui/views/shadow_border.h"
  25
  26 namespace {
  27
  28 const int kCloseIconTopPadding = 5;
  29 const int kCloseIconRightPadding = 5;
  30
  31 const int kShadowOffset = 1;
  32 const int kShadowBlur = 4;
  33
  34 const gfx::ImageSkia CreateImage(int width, int height, SkColor color) {
  35   SkBitmap bitmap;
  36   bitmap.allocN32Pixels(width, height);
  37   bitmap.eraseColor(color);
  38   return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
  39 }
  40
  41 // Take the alpha channel of small_image, mask it with the foreground,
  42 // then add the masked foreground on top of the background
  43 const gfx::ImageSkia GetMaskedSmallImage(const gfx::ImageSkia& small_image) {
  44   int width = small_image.width();
  45   int height = small_image.height();
  46
  47   // Background color grey
  48   const gfx::ImageSkia background = CreateImage(
  49       width, height, message_center::kSmallImageMaskBackgroundColor);
  50   // Foreground color white
  51   const gfx::ImageSkia foreground = CreateImage(
  52       width, height, message_center::kSmallImageMaskForegroundColor);
  53   const gfx::ImageSkia masked_small_image =
  54       gfx::ImageSkiaOperations::CreateMaskedImage(foreground, small_image);
  55   return gfx::ImageSkiaOperations::CreateSuperimposedImage(background,
  56                                                            masked_small_image);
  57 }
  58
  59 }  // namespace
  60
  61 namespace message_center {
  62
  63 MessageView::MessageView(MessageViewController* controller,
  64                          const std::string& notification_id,
  65                          const NotifierId& notifier_id,
  66                          const gfx::ImageSkia& small_image,
  67                          const base::string16& display_source)
  68     : controller_(controller),
  69       notification_id_(notification_id),
  70       notifier_id_(notifier_id),
  71       background_view_(NULL),
  72       scroller_(NULL),
  73       display_source_(display_source) {
  74   SetFocusable(true);
  75
  76   // Create the opaque background that's above the view's shadow.
  77   background_view_ = new views::View();
  78   background_view_->set_background(
  79       views::Background::CreateSolidBackground(kNotificationBackgroundColor));
  80   AddChildView(background_view_);
  81
  82   const gfx::ImageSkia masked_small_image = GetMaskedSmallImage(small_image);
  83   views::ImageView* small_image_view = new views::ImageView();
  84   small_image_view->SetImage(masked_small_image);
  85   small_image_view->SetImageSize(gfx::Size(kSmallImageSize, kSmallImageSize));
  86   // The small image view should be added to view hierarchy by the derived
  87   // class. This ensures that it is on top of other views.
  88   small_image_view->set_owned_by_client();
  89   small_image_view_.reset(small_image_view);
  90
  91   PaddedButton *close = new PaddedButton(this);
  92   close->SetPadding(-kCloseIconRightPadding, kCloseIconTopPadding);
  93   close->SetNormalImage(IDR_NOTIFICATION_CLOSE);
  94   close->SetHoveredImage(IDR_NOTIFICATION_CLOSE_HOVER);
  95   close->SetPressedImage(IDR_NOTIFICATION_CLOSE_PRESSED);
  96   close->set_animate_on_state_change(false);
  97   close->SetAccessibleName(l10n_util::GetStringUTF16(
  98       IDS_MESSAGE_CENTER_CLOSE_NOTIFICATION_BUTTON_ACCESSIBLE_NAME));
  99   // The close button should be added to view hierarchy by the derived class.
 100   // This ensures that it is on top of other views.
 101   close->set_owned_by_client();
 102   close_button_.reset(close);
 103
 104   focus_painter_ = views::Painter::CreateSolidFocusPainter(
 105       kFocusBorderColor,
 106       gfx::Insets(0, 1, 3, 2)).Pass();
 107 }
 108
 109 MessageView::~MessageView() {
 110 }
 111
 112 void MessageView::UpdateWithNotification(const Notification& notification) {
 113   const gfx::ImageSkia masked_small_image =
 114       GetMaskedSmallImage(notification.small_image().AsImageSkia());
 115   small_image_view_->SetImage(masked_small_image);
 116   display_source_ = notification.display_source();
 117 }
 118
 119 // static
 120 gfx::Insets MessageView::GetShadowInsets() {
 121   return gfx::Insets(kShadowBlur / 2 - kShadowOffset,
 122                      kShadowBlur / 2,
 123                      kShadowBlur / 2 + kShadowOffset,
 124                      kShadowBlur / 2);
 125 }
 126
 127 void MessageView::CreateShadowBorder() {
 128   SetBorder(scoped_ptr<views::Border>(
 129       new views::ShadowBorder(kShadowBlur,
 130                               message_center::kShadowColor,
 131                               kShadowOffset,  // Vertical offset.
 132                               0)));           // Horizontal offset.
 133 }
 134
 135 bool MessageView::IsCloseButtonFocused() {
 136   views::FocusManager* focus_manager = GetFocusManager();
 137   return focus_manager && focus_manager->GetFocusedView() == close_button();
 138 }
 139
 140 void MessageView::RequestFocusOnCloseButton() {
 141   close_button_->RequestFocus();
 142 }
 143
 144 void MessageView::GetAccessibleState(ui::AXViewState* state) {
 145   state->role = ui::AX_ROLE_BUTTON;
 146   state->name = accessible_name_;
 147 }
 148
 149 bool MessageView::OnMousePressed(const ui::MouseEvent& event) {
 150   if (!event.IsOnlyLeftMouseButton())
 151     return false;
 152
 153   controller_->ClickOnNotification(notification_id_);
 154   return true;
 155 }
 156
 157 bool MessageView::OnKeyPressed(const ui::KeyEvent& event) {
 158   if (event.flags() != ui::EF_NONE)
 159     return false;
 160
 161   if (event.key_code() == ui::VKEY_RETURN) {
 162     controller_->ClickOnNotification(notification_id_);
 163     return true;
 164   } else if ((event.key_code() == ui::VKEY_DELETE ||
 165               event.key_code() == ui::VKEY_BACK)) {
 166     controller_->RemoveNotification(notification_id_, true);  // By user.
 167     return true;
 168   }
 169
 170   return false;
 171 }
 172
 173 bool MessageView::OnKeyReleased(const ui::KeyEvent& event) {
 174   // Space key handling is triggerred at key-release timing. See
 175   // ui/views/controls/buttons/custom_button.cc for why.
 176   if (event.flags() != ui::EF_NONE || event.flags() != ui::VKEY_SPACE)
 177     return false;
 178
 179   controller_->ClickOnNotification(notification_id_);
 180   return true;
 181 }
 182
 183 void MessageView::OnPaint(gfx::Canvas* canvas) {
 184   DCHECK_EQ(this, close_button_->parent());
 185   DCHECK_EQ(this, small_image_view_->parent());
 186   SlideOutView::OnPaint(canvas);
 187   views::Painter::PaintFocusPainter(this, canvas, focus_painter_.get());
 188 }
 189
 190 void MessageView::OnFocus() {
 191   SlideOutView::OnFocus();
 192   // We paint a focus indicator.
 193   SchedulePaint();
 194 }
 195
 196 void MessageView::OnBlur() {
 197   SlideOutView::OnBlur();
 198   // We paint a focus indicator.
 199   SchedulePaint();
 200 }
 201
 202 void MessageView::Layout() {
 203   gfx::Rect content_bounds = GetContentsBounds();
 204
 205   // Background.
 206   background_view_->SetBoundsRect(content_bounds);
 207
 208   // Close button.
 209   gfx::Size close_size(close_button_->GetPreferredSize());
 210   gfx::Rect close_rect(content_bounds.right() - close_size.width(),
 211                        content_bounds.y(),
 212                        close_size.width(),
 213                        close_size.height());
 214   close_button_->SetBoundsRect(close_rect);
 215
 216   gfx::Size small_image_size(small_image_view_->GetPreferredSize());
 217   gfx::Rect small_image_rect(small_image_size);
 218   small_image_rect.set_origin(gfx::Point(
 219       content_bounds.right() - small_image_size.width() - kSmallImagePadding,
 220       content_bounds.bottom() - small_image_size.height() -
 221           kSmallImagePadding));
 222   small_image_view_->SetBoundsRect(small_image_rect);
 223 }
 224
 225 void MessageView::OnGestureEvent(ui::GestureEvent* event) {
 226   if (event->type() == ui::ET_GESTURE_TAP) {
 227     controller_->ClickOnNotification(notification_id_);
 228     event->SetHandled();
 229     return;
 230   }
 231
 232   SlideOutView::OnGestureEvent(event);
 233   // Do not return here by checking handled(). SlideOutView calls SetHandled()
 234   // even though the scroll gesture doesn't make no (or little) effects on the
 235   // slide-out behavior. See http://crbug.com/172991
 236
 237   if (!event->IsScrollGestureEvent() && !event->IsFlingScrollEvent())
 238     return;
 239
 240   if (scroller_)
 241     scroller_->OnGestureEvent(event);
 242   event->SetHandled();
 243 }
 244
 245 void MessageView::ButtonPressed(views::Button* sender,
 246                                 const ui::Event& event) {
 247   if (sender == close_button()) {
 248     controller_->RemoveNotification(notification_id_, true);  // By user.
 249   }
 250 }
 251
 252 void MessageView::OnSlideOut() {
 253   controller_->RemoveNotification(notification_id_, true);  // By user.
 254 }
 255
 256 }  // namespace message_center