ash/shell/lock_view.cc

   1 // Copyright (c) 2011 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/shell.h"
   6 #include "ash/shell_window_ids.h"
   7 #include "ash/shell/example_factory.h"
   8 #include "base/utf_string_conversions.h"
   9 #include "ui/aura/root_window.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/gfx/canvas.h"
  12 #include "ui/gfx/font.h"
  13 #include "ui/views/widget/widget.h"
  14 #include "ui/views/widget/widget_delegate.h"
  15
  16 using ash::Shell;
  17
  18 namespace ash {
  19 namespace shell {
  20
  21 class LockView : public views::WidgetDelegateView {
  22  public:
  23   LockView() {}
  24   virtual ~LockView() {}
  25
  26   // Overridden from View:
  27   virtual gfx::Size GetPreferredSize() OVERRIDE {
  28     return gfx::Size(500, 400);
  29   }
  30
  31  private:
  32   // Overridden from View:
  33   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
  34     canvas->FillRect(SK_ColorYELLOW, GetLocalBounds());
  35     string16 text = ASCIIToUTF16("LOCKED!");
  36     int string_width = font_.GetStringWidth(text);
  37     canvas->DrawStringInt(text, font_, SK_ColorRED, (width() - string_width)/ 2,
  38                           (height() - font_.GetHeight()) / 2,
  39                           string_width, font_.GetHeight());
  40   }
  41   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE {
  42     return true;
  43   }
  44   virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE {
  45     GetWidget()->Close();
  46   }
  47
  48   gfx::Font font_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(LockView);
  51 };
  52
  53 void CreateLockScreen() {
  54   LockView* lock_view = new LockView;
  55   views::Widget* widget = new views::Widget;
  56   views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
  57   gfx::Size ps = lock_view->GetPreferredSize();
  58
  59   gfx::Size root_window_size = aura::RootWindow::GetInstance()->GetHostSize();
  60   params.bounds = gfx::Rect((root_window_size.width() - ps.width()) / 2,
  61                             (root_window_size.height() - ps.height()) / 2,
  62                             ps.width(), ps.height());
  63   params.delegate = lock_view;
  64   widget->Init(params);
  65   Shell::GetInstance()->GetContainer(
  66       ash::internal::kShellWindowId_LockScreenContainer)->
  67       AddChild(widget->GetNativeView());
  68   widget->SetContentsView(lock_view);
  69   widget->Show();
  70   widget->GetNativeView()->SetName("LockView");
  71 }
  72
  73 }  // namespace shell
  74 }  // namespace ash