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      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 "chrome/browser/chromeos/login/shutdown_button.h"
      6 
      7 #include "base/utf_string_conversions.h"
      8 #include "chrome/browser/chromeos/cros/cros_library.h"
      9 #include "chrome/browser/chromeos/cros/power_library.h"
     10 #include "chrome/browser/chromeos/login/rounded_rect_painter.h"
     11 #include "chrome/browser/chromeos/view_ids.h"
     12 #include "grit/generated_resources.h"
     13 #include "grit/theme_resources.h"
     14 #include "ui/base/l10n/l10n_util.h"
     15 #include "ui/base/resource/resource_bundle.h"
     16 #include "ui/gfx/gtk_util.h"
     17 #include "views/background.h"
     18 
     19 namespace {
     20 
     21 // Style parameters for Shutdown button.
     22 
     23 // Bottom/Right padding to locale the shutdown button.
     24 const int kBottomPadding = 12;
     25 const int kRightPadding = 12;
     26 
     27 // Normal/Hover colors.
     28 const SkColor kShutdownButtonColor = 0xFF303845;
     29 const SkColor kShutdownHoverColor = 0xFF353E4E;
     30 
     31 // Padding inside button.
     32 const int kVerticalPadding = 13;
     33 const int kIconTextPadding = 10;
     34 const int kHorizontalPadding = 13;
     35 
     36 // Rounded corner radious.
     37 const int kCornerRadius = 4;
     38 
     39 class HoverBackground : public views::Background {
     40  public:
     41   HoverBackground(views::Background* normal, views::Background* hover)
     42       : normal_(normal), hover_(hover) {
     43   }
     44 
     45   // views::Background implementation.
     46   virtual void Paint(gfx::Canvas* canvas, views::View* view) const {
     47     views::TextButton* button = static_cast<views::TextButton*>(view);
     48     if (button->state() == views::CustomButton::BS_HOT) {
     49       hover_->Paint(canvas, view);
     50     } else {
     51       normal_->Paint(canvas, view);
     52     }
     53   }
     54 
     55  private:
     56   views::Background* normal_;
     57   views::Background* hover_;
     58 
     59   DISALLOW_COPY_AND_ASSIGN(HoverBackground);
     60 };
     61 
     62 }  // namespace
     63 
     64 namespace chromeos {
     65 
     66 ShutdownButton::ShutdownButton()
     67     : ALLOW_THIS_IN_INITIALIZER_LIST(TextButton(this, std::wstring())) {
     68 }
     69 
     70 void ShutdownButton::Init() {
     71   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
     72   SetIcon(*rb.GetBitmapNamed(IDR_SHUTDOWN_ICON));
     73   set_icon_text_spacing(kIconTextPadding);
     74   SetFocusable(true);
     75   SetID(VIEW_ID_SCREEN_LOCKER_SHUTDOWN);
     76   // Set label colors.
     77   SetEnabledColor(SK_ColorWHITE);
     78   SetDisabledColor(SK_ColorWHITE);
     79   SetHighlightColor(SK_ColorWHITE);
     80   SetHoverColor(SK_ColorWHITE);
     81   // Disable throbbing and make border always visible.
     82   SetAnimationDuration(0);
     83   SetNormalHasBorder(true);
     84   // Setup round shapes.
     85   set_background(
     86       new HoverBackground(
     87           CreateRoundedBackground(
     88               kCornerRadius, 0, kShutdownButtonColor, 0),
     89           CreateRoundedBackground(
     90               kCornerRadius, 0, kShutdownHoverColor, 0)));
     91   set_border(
     92       views::Border::CreateEmptyBorder(kVerticalPadding,
     93                                        kHorizontalPadding,
     94                                        kVerticalPadding,
     95                                        kHorizontalPadding));
     96   OnLocaleChanged();  // set text
     97 }
     98 
     99 void ShutdownButton::LayoutIn(views::View* parent) {
    100   // No RTL for now. RTL will be handled in new WebUI based Login/Locker.
    101   gfx::Size button_size = GetPreferredSize();
    102   SetBounds(
    103       parent->width() - button_size.width()- kRightPadding,
    104       parent->height() - button_size.height() - kBottomPadding,
    105       button_size.width(),
    106       button_size.height());
    107 }
    108 
    109 void ShutdownButton::OnLocaleChanged() {
    110   SetText(UTF8ToWide(l10n_util::GetStringUTF8(IDS_SHUTDOWN_BUTTON)));
    111   if (parent()) {
    112     parent()->Layout();
    113     parent()->SchedulePaint();
    114   }
    115 }
    116 
    117 gfx::NativeCursor ShutdownButton::GetCursorForPoint(
    118     ui::EventType event_type,
    119     const gfx::Point& p) {
    120   if (!IsEnabled()) {
    121     return NULL;
    122   }
    123   return gfx::GetCursor(GDK_HAND2);
    124 }
    125 
    126 void ShutdownButton::ButtonPressed(views::Button* sender,
    127                                    const views::Event& event) {
    128   DCHECK(CrosLibrary::Get()->EnsureLoaded());
    129   CrosLibrary::Get()->GetPowerLibrary()->RequestShutdown();
    130 }
    131 
    132 }  // namespace chromeos
    133