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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_state_delegate.h"
      6 #include "ash/shell.h"
      7 #include "ash/shell_window_ids.h"
      8 #include "ash/shell/example_factory.h"
      9 #include "base/strings/utf_string_conversions.h"
     10 #include "ui/aura/root_window.h"
     11 #include "ui/aura/window.h"
     12 #include "ui/gfx/canvas.h"
     13 #include "ui/gfx/font.h"
     14 #include "ui/views/controls/button/label_button.h"
     15 #include "ui/views/corewm/tooltip_controller.h"
     16 #include "ui/views/widget/widget.h"
     17 #include "ui/views/widget/widget_delegate.h"
     18 
     19 using ash::Shell;
     20 
     21 namespace ash {
     22 namespace shell {
     23 
     24 class LockView : public views::WidgetDelegateView,
     25                  public views::ButtonListener {
     26  public:
     27   LockView()
     28       : unlock_button_(new views::LabelButton(this, ASCIIToUTF16("Unlock"))) {
     29     unlock_button_->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
     30     AddChildView(unlock_button_);
     31     unlock_button_->SetFocusable(true);
     32   }
     33   virtual ~LockView() {}
     34 
     35   // Overridden from views::View:
     36   virtual gfx::Size GetPreferredSize() OVERRIDE {
     37     return gfx::Size(500, 400);
     38   }
     39 
     40  private:
     41   // Overridden from views::View:
     42   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
     43     canvas->FillRect(GetLocalBounds(), SK_ColorYELLOW);
     44     base::string16 text = ASCIIToUTF16("LOCKED!");
     45     int string_width = font_.GetStringWidth(text);
     46     canvas->DrawStringInt(text, font_, SK_ColorRED, (width() - string_width)/ 2,
     47                           (height() - font_.GetHeight()) / 2,
     48                           string_width, font_.GetHeight());
     49   }
     50   virtual void Layout() OVERRIDE {
     51     gfx::Rect bounds = GetLocalBounds();
     52     gfx::Size ps = unlock_button_->GetPreferredSize();
     53     bounds.set_y(bounds.bottom() - ps.height() - 5);
     54     bounds.set_x((bounds.width() - ps.width()) / 2);
     55     bounds.set_size(ps);
     56     unlock_button_->SetBoundsRect(bounds);
     57   }
     58   virtual void ViewHierarchyChanged(
     59       const ViewHierarchyChangedDetails& details) OVERRIDE {
     60     if (details.is_add && details.child == this)
     61       unlock_button_->RequestFocus();
     62   }
     63 
     64   // Overridden from views::WidgetDelegateView:
     65   virtual void WindowClosing() OVERRIDE {
     66     Shell::GetInstance()->session_state_delegate()->UnlockScreen();
     67   }
     68 
     69   // Overridden from views::ButtonListener:
     70   virtual void ButtonPressed(views::Button* sender,
     71                              const ui::Event& event) OVERRIDE {
     72     DCHECK(sender == unlock_button_);
     73     GetWidget()->Close();
     74   }
     75 
     76   gfx::Font font_;
     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(
     95       Shell::GetPrimaryRootWindow(),
     96       internal::kShellWindowId_LockScreenContainer);
     97   widget->Init(params);
     98   widget->SetContentsView(lock_view);
     99   widget->Show();
    100   widget->GetNativeView()->SetName("LockView");
    101   widget->GetNativeView()->Focus();
    102 
    103   // TODO: it shouldn't be necessary to invoke UpdateTooltip() here.
    104   Shell::GetInstance()->tooltip_controller()->UpdateTooltip(
    105       widget->GetNativeView());
    106 }
    107 
    108 }  // namespace shell
    109 }  // namespace ash
    110