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_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_->set_focusable(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