ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.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/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h"
   6
   7 #include "ash/shelf/shelf.h"
   8 #include "ash/shelf/shelf_constants.h"
   9 #include "ash/shell.h"
  10 #include "ash/system/status_area_widget.h"
  11 #include "ash/system/tray/system_tray_notifier.h"
  12 #include "ash/system/tray/tray_constants.h"
  13 #include "ash/system/tray/tray_utils.h"
  14 #include "grit/ash_resources.h"
  15 #include "grit/ash_strings.h"
  16 #include "ui/base/l10n/l10n_util.h"
  17 #include "ui/base/resource/resource_bundle.h"
  18 #include "ui/events/event.h"
  19 #include "ui/gfx/image/image_skia.h"
  20 #include "ui/keyboard/keyboard_controller.h"
  21 #include "ui/views/controls/button/image_button.h"
  22
  23 namespace ash {
  24
  25 VirtualKeyboardTray::VirtualKeyboardTray(StatusAreaWidget* status_area_widget)
  26     : TrayBackgroundView(status_area_widget),
  27       button_(NULL) {
  28   button_ = new views::ImageButton(this);
  29   button_->SetImage(views::CustomButton::STATE_NORMAL,
  30                     ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
  31                         IDR_AURA_UBER_TRAY_VIRTUAL_KEYBOARD));
  32   button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
  33                              views::ImageButton::ALIGN_MIDDLE);
  34
  35   tray_container()->AddChildView(button_);
  36   SetContentsBackground();
  37   // The Shell may not exist in some unit tests.
  38   if (Shell::HasInstance()) {
  39     Shell::GetInstance()->system_tray_notifier()->
  40         AddAccessibilityObserver(this);
  41   }
  42 }
  43
  44 VirtualKeyboardTray::~VirtualKeyboardTray() {
  45   // The Shell may not exist in some unit tests.
  46   if (Shell::HasInstance()) {
  47     Shell::GetInstance()->system_tray_notifier()->
  48         RemoveAccessibilityObserver(this);
  49   }
  50 }
  51
  52 void VirtualKeyboardTray::SetShelfAlignment(ShelfAlignment alignment) {
  53   TrayBackgroundView::SetShelfAlignment(alignment);
  54   tray_container()->SetBorder(views::Border::NullBorder());
  55
  56   // Pad button size to align with other controls in the system tray.
  57   const gfx::ImageSkia image = button_->GetImage(
  58       views::CustomButton::STATE_NORMAL);
  59   int top_padding = (kTrayBarButtonWidth - image.height()) / 2;
  60   int left_padding = (kTrayBarButtonWidth - image.width()) / 2;
  61   int bottom_padding = kTrayBarButtonWidth - image.height() - top_padding;
  62   int right_padding = kTrayBarButtonWidth - image.width() - left_padding;
  63
  64   // Square up the padding if horizontally aligned. Avoid extra padding when
  65   // vertically aligned as the button would violate the width constraint on the
  66   // shelf.
  67   if (alignment == SHELF_ALIGNMENT_BOTTOM || alignment == SHELF_ALIGNMENT_TOP) {
  68     gfx::Insets insets = button_->GetInsets();
  69     int additional_padding = std::max(0, top_padding - left_padding);
  70     left_padding += additional_padding;
  71     right_padding += additional_padding;
  72   }
  73
  74   button_->SetBorder(views::Border::CreateEmptyBorder(
  75       top_padding,
  76       left_padding,
  77       bottom_padding,
  78       right_padding));
  79 }
  80
  81 base::string16 VirtualKeyboardTray::GetAccessibleNameForTray() {
  82   return l10n_util::GetStringUTF16(
  83       IDS_ASH_VIRTUAL_KEYBOARD_TRAY_ACCESSIBLE_NAME);
  84 }
  85
  86 void VirtualKeyboardTray::HideBubbleWithView(
  87     const views::TrayBubbleView* bubble_view) {
  88 }
  89
  90 bool VirtualKeyboardTray::ClickedOutsideBubble() {
  91   return false;
  92 }
  93
  94 bool VirtualKeyboardTray::PerformAction(const ui::Event& event) {
  95   keyboard::KeyboardController::GetInstance()->ShowKeyboard(true);
  96   return true;
  97 }
  98
  99 void VirtualKeyboardTray::ButtonPressed(views::Button* sender,
 100                                         const ui::Event& event) {
 101   DCHECK_EQ(button_, sender);
 102   PerformAction(event);
 103 }
 104
 105 void VirtualKeyboardTray::OnAccessibilityModeChanged(
 106     ui::AccessibilityNotificationVisibility notify) {
 107   SetVisible(Shell::GetInstance()->accessibility_delegate()->
 108       IsVirtualKeyboardEnabled());
 109 }
 110
 111 }  // namespace ash