src/chrome/browser/ui/views/message_center/message_center_widget_delegate.cc

   1 // Copyright 2013 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 "chrome/browser/ui/views/message_center/message_center_widget_delegate.h"
   6
   7 #include <complex>
   8
   9 #include "chrome/browser/ui/views/message_center/message_center_frame_view.h"
  10 #include "chrome/browser/ui/views/message_center/web_notification_tray.h"
  11 #include "content/public/browser/user_metrics.h"
  12 #include "ui/accessibility/ax_view_state.h"
  13 #include "ui/gfx/screen.h"
  14 #include "ui/message_center/message_center_style.h"
  15 #include "ui/message_center/views/message_center_view.h"
  16 #include "ui/native_theme/native_theme.h"
  17 #include "ui/views/border.h"
  18 #include "ui/views/layout/box_layout.h"
  19 #include "ui/views/widget/widget.h"
  20
  21 #if defined(OS_WIN)
  22 #include "ui/views/win/hwnd_util.h"
  23 #endif
  24
  25 #if defined(USE_ASH)
  26 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
  27 #endif
  28
  29 namespace message_center {
  30
  31 MessageCenterWidgetDelegate::MessageCenterWidgetDelegate(
  32     WebNotificationTray* tray,
  33     MessageCenterTray* mc_tray,
  34     bool initially_settings_visible,
  35     const PositionInfo& pos_info)
  36     : MessageCenterView(tray->message_center(),
  37                         mc_tray,
  38                         pos_info.max_height,
  39                         initially_settings_visible,
  40                         pos_info.message_center_alignment &
  41                             ALIGNMENT_TOP),  // Show buttons on top if message
  42                                              // center is top aligned
  43       pos_info_(pos_info),
  44       tray_(tray) {
  45   // A WidgetDelegate should be deleted on DeleteDelegate.
  46   set_owned_by_client();
  47
  48   views::BoxLayout* layout =
  49       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0);
  50   layout->set_spread_blank_space(true);
  51   SetLayoutManager(layout);
  52
  53   AddAccelerator(ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE));
  54
  55   SetPaintToLayer(true);
  56   SetFillsBoundsOpaquely(true);
  57
  58   InitWidget();
  59 }
  60
  61 MessageCenterWidgetDelegate::~MessageCenterWidgetDelegate() {
  62   views::Widget* widget = GetWidget();
  63   if (widget) {
  64     widget->RemoveObserver(this);
  65   }
  66 }
  67
  68 views::View* MessageCenterWidgetDelegate::GetContentsView() {
  69   return this;
  70 }
  71
  72 views::NonClientFrameView*
  73 MessageCenterWidgetDelegate::CreateNonClientFrameView(views::Widget* widget) {
  74   MessageCenterFrameView* frame_view = new MessageCenterFrameView();
  75   border_insets_ = frame_view->GetInsets();
  76   return frame_view;
  77 }
  78
  79 void MessageCenterWidgetDelegate::DeleteDelegate() {
  80   delete this;
  81 }
  82
  83 views::Widget* MessageCenterWidgetDelegate::GetWidget() {
  84   return View::GetWidget();
  85 }
  86
  87 const views::Widget* MessageCenterWidgetDelegate::GetWidget() const {
  88   return View::GetWidget();
  89 }
  90
  91 void MessageCenterWidgetDelegate::OnWidgetActivationChanged(
  92     views::Widget* widget,
  93     bool active) {
  94   // Some Linux users set 'focus-follows-mouse' where the activation is lost
  95   // immediately after the mouse exists from the bubble, which is a really bad
  96   // experience. Disable hiding until the bug around the focus is fixed.
  97   // TODO(erg, pkotwicz): fix the activation issue and then remove this ifdef.
  98 #if !defined(OS_LINUX)
  99   if (!active) {
 100     tray_->SendHideMessageCenter();
 101   }
 102 #endif
 103 }
 104
 105 void MessageCenterWidgetDelegate::OnWidgetClosing(views::Widget* widget) {
 106   SetIsClosing(true);
 107   tray_->MarkMessageCenterHidden();
 108 }
 109
 110 void MessageCenterWidgetDelegate::PreferredSizeChanged() {
 111   GetWidget()->SetBounds(GetMessageCenterBounds());
 112   views::View::PreferredSizeChanged();
 113 }
 114
 115 gfx::Size MessageCenterWidgetDelegate::GetPreferredSize() {
 116   int preferred_width = kNotificationWidth + 2 * kMarginBetweenItems;
 117   return gfx::Size(preferred_width, GetHeightForWidth(preferred_width));
 118 }
 119
 120 gfx::Size MessageCenterWidgetDelegate::GetMaximumSize() {
 121   gfx::Size size = GetPreferredSize();
 122   return size;
 123 }
 124
 125 int MessageCenterWidgetDelegate::GetHeightForWidth(int width) {
 126   int height = MessageCenterView::GetHeightForWidth(width);
 127   return (pos_info_.max_height != 0) ?
 128     std::min(height, pos_info_.max_height - border_insets_.height()) : height;
 129 }
 130
 131 bool MessageCenterWidgetDelegate::AcceleratorPressed(
 132     const ui::Accelerator& accelerator) {
 133   if (accelerator.key_code() != ui::VKEY_ESCAPE)
 134     return false;
 135   tray_->SendHideMessageCenter();
 136   return true;
 137 }
 138
 139 void MessageCenterWidgetDelegate::InitWidget() {
 140   views::Widget* widget = new views::Widget();
 141   views::Widget::InitParams params(views::Widget::InitParams::TYPE_BUBBLE);
 142   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
 143   params.delegate = this;
 144   params.keep_on_top = true;
 145   params.top_level = true;
 146 #if defined(USE_ASH)
 147   // This class is not used in Ash; there is another container for the message
 148   // center that's used there.  So, we must be in a Views + Ash environment.  We
 149   // want the notification center to be available on both desktops.  Setting the
 150   // |native_widget| variable here ensures that the widget is hosted on the
 151   // native desktop.
 152   params.native_widget = new views::DesktopNativeWidgetAura(widget);
 153 #endif
 154   widget->Init(params);
 155
 156   widget->AddObserver(this);
 157   widget->StackAtTop();
 158   widget->SetAlwaysOnTop(true);
 159
 160   const NotificationList::Notifications& notifications =
 161       tray_->message_center()->GetVisibleNotifications();
 162   SetNotifications(notifications);
 163
 164   widget->SetBounds(GetMessageCenterBounds());
 165   widget->Show();
 166   widget->Activate();
 167 }
 168
 169 gfx::Point MessageCenterWidgetDelegate::GetCorrectedAnchor(
 170     gfx::Size calculated_size) {
 171   gfx::Point corrected_anchor = pos_info_.inital_anchor_point;
 172
 173   // Inset the width slightly so that the click point is not exactly on the edge
 174   // of the message center but somewhere within the middle 60 %.
 175   int insetted_width = (calculated_size.width() * 4) / 5;
 176
 177   if (pos_info_.taskbar_alignment == ALIGNMENT_TOP ||
 178       pos_info_.taskbar_alignment == ALIGNMENT_BOTTOM) {
 179     int click_point_x = tray_->mouse_click_point().x();
 180
 181     if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT) {
 182       int opposite_x_corner =
 183           pos_info_.inital_anchor_point.x() - insetted_width;
 184
 185       // If the click point is outside the x axis length of the message center,
 186       // push the message center towards the left to align with the click point.
 187       if (opposite_x_corner > click_point_x)
 188         corrected_anchor.set_x(pos_info_.inital_anchor_point.x() -
 189                                (opposite_x_corner - click_point_x));
 190     } else {
 191       int opposite_x_corner =
 192           pos_info_.inital_anchor_point.x() + insetted_width;
 193
 194       if (opposite_x_corner < click_point_x)
 195         corrected_anchor.set_x(pos_info_.inital_anchor_point.x() +
 196                                (click_point_x - opposite_x_corner));
 197     }
 198   } else if (pos_info_.taskbar_alignment == ALIGNMENT_LEFT ||
 199              pos_info_.taskbar_alignment == ALIGNMENT_RIGHT) {
 200     int click_point_y = tray_->mouse_click_point().y();
 201
 202     if (pos_info_.message_center_alignment & ALIGNMENT_BOTTOM) {
 203       int opposite_y_corner =
 204           pos_info_.inital_anchor_point.y() - insetted_width;
 205
 206       // If the click point is outside the y axis length of the message center,
 207       // push the message center upwards to align with the click point.
 208       if (opposite_y_corner > click_point_y)
 209         corrected_anchor.set_y(pos_info_.inital_anchor_point.y() -
 210                                (opposite_y_corner - click_point_y));
 211     } else {
 212       int opposite_y_corner =
 213           pos_info_.inital_anchor_point.y() + insetted_width;
 214
 215       if (opposite_y_corner < click_point_y)
 216         corrected_anchor.set_y(pos_info_.inital_anchor_point.y() +
 217                                (click_point_y - opposite_y_corner));
 218     }
 219   }
 220   return corrected_anchor;
 221 }
 222
 223 gfx::Rect MessageCenterWidgetDelegate::GetMessageCenterBounds() {
 224   gfx::Size size = GetPreferredSize();
 225
 226   // Make space for borders on sides.
 227   size.Enlarge(border_insets_.width(), border_insets_.height());
 228   gfx::Rect bounds(size);
 229
 230   gfx::Point corrected_anchor = GetCorrectedAnchor(size);
 231
 232   if (pos_info_.message_center_alignment & ALIGNMENT_TOP)
 233     bounds.set_y(corrected_anchor.y());
 234   if (pos_info_.message_center_alignment & ALIGNMENT_BOTTOM)
 235     bounds.set_y(corrected_anchor.y() - size.height());
 236   if (pos_info_.message_center_alignment & ALIGNMENT_LEFT)
 237     bounds.set_x(corrected_anchor.x());
 238   if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT)
 239     bounds.set_x(corrected_anchor.x() - size.width());
 240
 241   return bounds;
 242 }
 243
 244 }  // namespace message_center