ash/shell/lock_view.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/session/session_state_delegate.h"
   6 #include "ash/shell.h"
   7 #include "ash/shell/example_factory.h"
   8 #include "ash/shell_window_ids.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/aura/window_event_dispatcher.h"
  12 #include "ui/gfx/canvas.h"
  13 #include "ui/gfx/font_list.h"
  14 #include "ui/gfx/geometry/rect.h"
  15 #include "ui/gfx/text_utils.h"
  16 #include "ui/views/controls/button/label_button.h"
  17 #include "ui/views/corewm/tooltip_controller.h"
  18 #include "ui/views/widget/widget.h"
  19 #include "ui/views/widget/widget_delegate.h"
  20
  21 using ash::Shell;
  22
  23 namespace ash {
  24 namespace shell {
  25
  26 class LockView : public views::WidgetDelegateView,
  27                  public views::ButtonListener {
  28  public:
  29   LockView() : unlock_button_(new views::LabelButton(
  30                                   this, base::ASCIIToUTF16("Unlock"))) {
  31     unlock_button_->SetStyle(views::Button::STYLE_BUTTON);
  32     AddChildView(unlock_button_);
  33     unlock_button_->SetFocusable(true);
  34   }
  35   ~LockView() override {}
  36
  37   // Overridden from views::View:
  38   gfx::Size GetPreferredSize() const override { return gfx::Size(500, 400); }
  39
  40  private:
  41   // Overridden from views::View:
  42   void OnPaint(gfx::Canvas* canvas) override {
  43     canvas->FillRect(GetLocalBounds(), SK_ColorYELLOW);
  44     base::string16 text = base::ASCIIToUTF16("LOCKED!");
  45     int string_width = gfx::GetStringWidth(text, font_list_);
  46     canvas->DrawStringRect(text, font_list_, SK_ColorRED,
  47                            gfx::Rect((width() - string_width)/ 2,
  48                                      (height() - font_list_.GetHeight()) / 2,
  49                                      string_width, font_list_.GetHeight()));
  50   }
  51   void Layout() override {
  52     gfx::Rect bounds = GetLocalBounds();
  53     gfx::Size ps = unlock_button_->GetPreferredSize();
  54     bounds.set_y(bounds.bottom() - ps.height() - 5);
  55     bounds.set_x((bounds.width() - ps.width()) / 2);
  56     bounds.set_size(ps);
  57     unlock_button_->SetBoundsRect(bounds);
  58   }
  59   void ViewHierarchyChanged(
  60       const ViewHierarchyChangedDetails& details) override {
  61     if (details.is_add && details.child == this)
  62       unlock_button_->RequestFocus();
  63   }
  64
  65   // Overridden from views::WidgetDelegateView:
  66   void WindowClosing() override {
  67     Shell::GetInstance()->session_state_delegate()->UnlockScreen();
  68   }
  69
  70   // Overridden from views::ButtonListener:
  71   void ButtonPressed(views::Button* sender, const ui::Event& event) override {
  72     DCHECK(sender == unlock_button_);
  73     GetWidget()->Close();
  74   }
  75
  76   gfx::FontList font_list_;
  77   views::LabelButton* unlock_button_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(LockView);
  80 };
  81
  82 void CreateLockScreen() {
  83   LockView* lock_view = new LockView;
  84   views::Widget* widget = new views::Widget;
  85   views::Widget::InitParams params(
  86       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
  87   gfx::Size ps = lock_view->GetPreferredSize();
  88
  89   gfx::Size root_window_size = Shell::GetPrimaryRootWindow()->bounds().size();
  90   params.bounds = gfx::Rect((root_window_size.width() - ps.width()) / 2,
  91                             (root_window_size.height() - ps.height()) / 2,
  92                             ps.width(), ps.height());
  93   params.delegate = lock_view;
  94   params.parent = Shell::GetContainer(Shell::GetPrimaryRootWindow(),
  95                                       kShellWindowId_LockScreenContainer);
  96   widget->Init(params);
  97   widget->SetContentsView(lock_view);
  98   widget->Show();
  99   widget->GetNativeView()->SetName("LockView");
 100   widget->GetNativeView()->Focus();
 101
 102   // TODO: it shouldn't be necessary to invoke UpdateTooltip() here.
 103   Shell::GetInstance()->tooltip_controller()->UpdateTooltip(
 104       widget->GetNativeView());
 105 }
 106
 107 }  // namespace shell
 108 }  // namespace ash