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      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   virtual ~LockView() {}
     36 
     37   // Overridden from views::View:
     38   virtual gfx::Size GetPreferredSize() const OVERRIDE {
     39     return gfx::Size(500, 400);
     40   }
     41 
     42  private:
     43   // Overridden from views::View:
     44   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
     45     canvas->FillRect(GetLocalBounds(), SK_ColorYELLOW);
     46     base::string16 text = base::ASCIIToUTF16("LOCKED!");
     47     int string_width = gfx::GetStringWidth(text, font_list_);
     48     canvas->DrawStringRect(text, font_list_, SK_ColorRED,
     49                            gfx::Rect((width() - string_width)/ 2,
     50                                      (height() - font_list_.GetHeight()) / 2,
     51                                      string_width, font_list_.GetHeight()));
     52   }
     53   virtual void Layout() OVERRIDE {
     54     gfx::Rect bounds = GetLocalBounds();
     55     gfx::Size ps = unlock_button_->GetPreferredSize();
     56     bounds.set_y(bounds.bottom() - ps.height() - 5);
     57     bounds.set_x((bounds.width() - ps.width()) / 2);
     58     bounds.set_size(ps);
     59     unlock_button_->SetBoundsRect(bounds);
     60   }
     61   virtual void ViewHierarchyChanged(
     62       const ViewHierarchyChangedDetails& details) OVERRIDE {
     63     if (details.is_add && details.child == this)
     64       unlock_button_->RequestFocus();
     65   }
     66 
     67   // Overridden from views::WidgetDelegateView:
     68   virtual void WindowClosing() OVERRIDE {
     69     Shell::GetInstance()->session_state_delegate()->UnlockScreen();
     70   }
     71 
     72   // Overridden from views::ButtonListener:
     73   virtual void ButtonPressed(views::Button* sender,
     74                              const ui::Event& event) OVERRIDE {
     75     DCHECK(sender == unlock_button_);
     76     GetWidget()->Close();
     77   }
     78 
     79   gfx::FontList font_list_;
     80   views::LabelButton* unlock_button_;
     81 
     82   DISALLOW_COPY_AND_ASSIGN(LockView);
     83 };
     84 
     85 void CreateLockScreen() {
     86   LockView* lock_view = new LockView;
     87   views::Widget* widget = new views::Widget;
     88   views::Widget::InitParams params(
     89       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
     90   gfx::Size ps = lock_view->GetPreferredSize();
     91 
     92   gfx::Size root_window_size = Shell::GetPrimaryRootWindow()->bounds().size();
     93   params.bounds = gfx::Rect((root_window_size.width() - ps.width()) / 2,
     94                             (root_window_size.height() - ps.height()) / 2,
     95                             ps.width(), ps.height());
     96   params.delegate = lock_view;
     97   params.parent = Shell::GetContainer(Shell::GetPrimaryRootWindow(),
     98                                       kShellWindowId_LockScreenContainer);
     99   widget->Init(params);
    100   widget->SetContentsView(lock_view);
    101   widget->Show();
    102   widget->GetNativeView()->SetName("LockView");
    103   widget->GetNativeView()->Focus();
    104 
    105   // TODO: it shouldn't be necessary to invoke UpdateTooltip() here.
    106   Shell::GetInstance()->tooltip_controller()->UpdateTooltip(
    107       widget->GetNativeView());
    108 }
    109 
    110 }  // namespace shell
    111 }  // namespace ash
    112