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      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     AccessibilityNotificationVisibility notify) {
    107   SetVisible(Shell::GetInstance()->accessibility_delegate()->
    108       IsVirtualKeyboardEnabled());
    109 }
    110 
    111 }  // namespace ash
    112