ash/display/display_error_dialog.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 "ash/display/display_error_dialog.h"
   6
   7 #include "ash/screen_ash.h"
   8 #include "ash/shell.h"
   9 #include "grit/ash_strings.h"
  10 #include "ui/aura/root_window.h"
  11 #include "ui/aura/window.h"
  12 #include "ui/base/l10n/l10n_util.h"
  13 #include "ui/base/ui_base_types.h"
  14 #include "ui/gfx/display.h"
  15 #include "ui/gfx/screen.h"
  16 #include "ui/views/border.h"
  17 #include "ui/views/controls/label.h"
  18 #include "ui/views/widget/widget.h"
  19
  20 namespace ash {
  21 namespace internal {
  22 namespace {
  23
  24 // The width of the area to show the error message.
  25 const int kDialogMessageWidthPixel = 300;
  26
  27 // The margin width from the error message to the edge of the dialog.
  28 const int kDialogMessageMarginWidthPixel = 5;
  29
  30 DisplayErrorDialog* g_instance = NULL;
  31
  32 }  // namespace
  33
  34 // static
  35 void  DisplayErrorDialog::ShowDialog() {
  36   if (g_instance) {
  37     DCHECK(g_instance->GetWidget());
  38     g_instance->GetWidget()->StackAtTop();
  39     g_instance->GetWidget()->Activate();
  40     return;
  41   }
  42
  43   gfx::Screen* screen = Shell::GetScreen();
  44   const gfx::Display& target_display =
  45       (screen->GetNumDisplays() > 1) ?
  46       ScreenAsh::GetSecondaryDisplay() : screen->GetPrimaryDisplay();
  47
  48   g_instance = new DisplayErrorDialog();
  49   views::Widget* widget = new views::Widget;
  50   views::Widget::InitParams params(views::Widget::InitParams::TYPE_WINDOW);
  51   params.delegate = g_instance;
  52   // Makes |widget| belong to the target display.  Size and location are
  53   // fixed by CenterWindow() below.
  54   params.bounds = target_display.bounds();
  55   DisplayController* display_controller =
  56       Shell::GetInstance()->display_controller();
  57   params.context =
  58       display_controller->GetRootWindowForDisplayId(target_display.id());
  59   params.keep_on_top = true;
  60   widget->Init(params);
  61
  62   widget->GetNativeView()->SetName("DisplayErrorDialog");
  63   widget->CenterWindow(widget->GetRootView()->GetPreferredSize());
  64   widget->Show();
  65 }
  66
  67 DisplayErrorDialog::DisplayErrorDialog() {
  68   Shell::GetInstance()->display_controller()->AddObserver(this);
  69   label_ = new views::Label(
  70       l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_FAILURE_ON_MIRRORING));
  71   AddChildView(label_);
  72
  73   label_->SetMultiLine(true);
  74   label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  75   label_->set_border(views::Border::CreateEmptyBorder(
  76       kDialogMessageMarginWidthPixel,
  77       kDialogMessageMarginWidthPixel,
  78       kDialogMessageMarginWidthPixel,
  79       kDialogMessageMarginWidthPixel));
  80   label_->SizeToFit(kDialogMessageWidthPixel);
  81 }
  82
  83 DisplayErrorDialog::~DisplayErrorDialog() {
  84   Shell::GetInstance()->display_controller()->RemoveObserver(this);
  85   g_instance = NULL;
  86 }
  87
  88 int DisplayErrorDialog::GetDialogButtons() const {
  89   return ui::DIALOG_BUTTON_OK;
  90 }
  91
  92 ui::ModalType DisplayErrorDialog::GetModalType() const {
  93   return ui::MODAL_TYPE_NONE;
  94 }
  95
  96 gfx::Size DisplayErrorDialog::GetPreferredSize() {
  97   return label_->GetPreferredSize();
  98 }
  99
 100 void DisplayErrorDialog::OnDisplayConfigurationChanging() {
 101   GetWidget()->Close();
 102 }
 103
 104 // static
 105 DisplayErrorDialog* DisplayErrorDialog::GetInstanceForTest() {
 106   return g_instance;
 107 }
 108
 109 }  // namespace internal
 110 }  // namespace ash