ash/display/display_error_dialog.h

   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 #ifndef ASH_DISPLAY_DISPLAY_ERROR_DIALOG_H_
   6 #define ASH_DISPLAY_DISPLAY_ERROR_DIALOG_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/display/display_controller.h"
  10 #include "base/compiler_specific.h"
  11 #include "chromeos/display/output_configurator.h"
  12 #include "ui/views/widget/widget_observer.h"
  13 #include "ui/views/window/dialog_delegate.h"
  14
  15 namespace aura {
  16 class RootWindow;
  17 }  // namespace aura
  18
  19 namespace gfx {
  20 class Display;
  21 class Size;
  22 }  // namespace gfx
  23
  24 namespace views {
  25 class Label;
  26 }  // namespace views
  27
  28 namespace ash {
  29 namespace internal {
  30
  31 // Dialog used to show an error messages when unable to change the display
  32 // configuration to mirroring.
  33 class ASH_EXPORT DisplayErrorDialog : public views::DialogDelegateView,
  34                                       public ash::DisplayController::Observer {
  35  public:
  36   // Shows the error dialog for |failed_new_state| and returns it.
  37   static DisplayErrorDialog* ShowDialog(chromeos::OutputState failed_new_state);
  38
  39   // Update the error message for |failed_new_state|.
  40   void UpdateMessageForState(chromeos::OutputState failed_new_state);
  41
  42  private:
  43   explicit DisplayErrorDialog(chromeos::OutputState failed_new_state);
  44   virtual ~DisplayErrorDialog();
  45
  46   // views::DialogDelegate overrides:
  47   virtual int GetDialogButtons() const OVERRIDE;
  48
  49   // views::WidgetDelegate overrides::
  50   virtual ui::ModalType GetModalType() const OVERRIDE;
  51
  52   // views::View overrides:
  53   virtual gfx::Size GetPreferredSize() OVERRIDE;
  54
  55   // ash::DisplayController::Observer overrides:
  56   virtual void OnDisplayConfigurationChanging() OVERRIDE;
  57
  58   views::Label* label_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(DisplayErrorDialog);
  61 };
  62
  63 // The class to observe the output failures and shows the error dialog when
  64 // necessary.
  65 class ASH_EXPORT DisplayErrorObserver
  66     : public chromeos::OutputConfigurator::Observer,
  67       public views::WidgetObserver {
  68  public:
  69   DisplayErrorObserver();
  70   virtual ~DisplayErrorObserver();
  71
  72   const DisplayErrorDialog* dialog() const { return dialog_; }
  73
  74   // chromeos::OutputConfigurator::Observer overrides:
  75   virtual void OnDisplayModeChangeFailed(
  76       chromeos::OutputState failed_new_state) OVERRIDE;
  77
  78   // views::WidgetObserver overrides:
  79   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
  80
  81  private:
  82   DisplayErrorDialog* dialog_;
  83
  84   DISALLOW_COPY_AND_ASSIGN(DisplayErrorObserver);
  85 };
  86
  87 }  // namespace internal
  88 }  // namespace ash
  89
  90 #endif  // ASH_DISPLAY_DISPLAY_ERROR_DIALOG_H_