ash/system/tray/hover_highlight_view.cc

   1 // Copyright 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/system/tray/hover_highlight_view.h"
   6
   7 #include "ash/system/tray/fixed_sized_image_view.h"
   8 #include "ash/system/tray/tray_constants.h"
   9 #include "ash/system/tray/view_click_listener.h"
  10 #include "ui/accessibility/ax_view_state.h"
  11 #include "ui/base/resource/resource_bundle.h"
  12 #include "ui/gfx/canvas.h"
  13 #include "ui/gfx/font_list.h"
  14 #include "ui/resources/grit/ui_resources.h"
  15 #include "ui/views/border.h"
  16 #include "ui/views/controls/image_view.h"
  17 #include "ui/views/controls/label.h"
  18 #include "ui/views/layout/box_layout.h"
  19 #include "ui/views/layout/fill_layout.h"
  20
  21 namespace {
  22
  23 const int kCheckLabelPadding = 4;
  24
  25 }  // namespace
  26
  27 namespace ash {
  28
  29 HoverHighlightView::HoverHighlightView(ViewClickListener* listener)
  30     : listener_(listener),
  31       text_label_(NULL),
  32       highlight_color_(kHoverBackgroundColor),
  33       default_color_(0),
  34       text_highlight_color_(0),
  35       text_default_color_(0),
  36       hover_(false),
  37       expandable_(false),
  38       checkable_(false),
  39       checked_(false) {
  40   set_notify_enter_exit_on_child(true);
  41 }
  42
  43 HoverHighlightView::~HoverHighlightView() {
  44 }
  45
  46 void HoverHighlightView::AddIconAndLabel(const gfx::ImageSkia& image,
  47                                          const base::string16& text,
  48                                          gfx::Font::FontStyle style) {
  49   SetLayoutManager(new views::BoxLayout(
  50       views::BoxLayout::kHorizontal, 0, 3, kTrayPopupPaddingBetweenItems));
  51   views::ImageView* image_view =
  52       new FixedSizedImageView(kTrayPopupDetailsIconWidth, 0);
  53   image_view->SetImage(image);
  54   AddChildView(image_view);
  55
  56   text_label_ = new views::Label(text);
  57   text_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  58   text_label_->SetFontList(text_label_->font_list().DeriveWithStyle(style));
  59   if (text_default_color_)
  60     text_label_->SetEnabledColor(text_default_color_);
  61   AddChildView(text_label_);
  62
  63   SetAccessibleName(text);
  64 }
  65
  66 views::Label* HoverHighlightView::AddLabel(const base::string16& text,
  67                                            gfx::HorizontalAlignment alignment,
  68                                            gfx::Font::FontStyle style) {
  69   SetLayoutManager(new views::FillLayout());
  70   text_label_ = new views::Label(text);
  71   int left_margin = kTrayPopupPaddingHorizontal;
  72   int right_margin = kTrayPopupPaddingHorizontal;
  73   if (alignment != gfx::ALIGN_CENTER) {
  74     if (base::i18n::IsRTL())
  75       right_margin += kTrayPopupDetailsLabelExtraLeftMargin;
  76     else
  77       left_margin += kTrayPopupDetailsLabelExtraLeftMargin;
  78   }
  79   text_label_->SetBorder(
  80       views::Border::CreateEmptyBorder(5, left_margin, 5, right_margin));
  81   text_label_->SetHorizontalAlignment(alignment);
  82   text_label_->SetFontList(text_label_->font_list().DeriveWithStyle(style));
  83   // Do not set alpha value in disable color. It will have issue with elide
  84   // blending filter in disabled state for rendering label text color.
  85   text_label_->SetDisabledColor(SkColorSetARGB(255, 127, 127, 127));
  86   if (text_default_color_)
  87     text_label_->SetEnabledColor(text_default_color_);
  88   AddChildView(text_label_);
  89
  90   SetAccessibleName(text);
  91   return text_label_;
  92 }
  93
  94 views::Label* HoverHighlightView::AddCheckableLabel(const base::string16& text,
  95                                                     gfx::Font::FontStyle style,
  96                                                     bool checked) {
  97   checkable_ = true;
  98   checked_ = checked;
  99   if (checked) {
 100     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 101     const gfx::ImageSkia* check =
 102         rb.GetImageNamed(IDR_MENU_CHECK).ToImageSkia();
 103     int margin = kTrayPopupPaddingHorizontal +
 104         kTrayPopupDetailsLabelExtraLeftMargin - kCheckLabelPadding;
 105     SetLayoutManager(new views::BoxLayout(
 106         views::BoxLayout::kHorizontal, 0, 3, kCheckLabelPadding));
 107     views::ImageView* image_view = new FixedSizedImageView(margin, 0);
 108     image_view->SetImage(check);
 109     image_view->SetHorizontalAlignment(views::ImageView::TRAILING);
 110     AddChildView(image_view);
 111
 112     text_label_ = new views::Label(text);
 113     text_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 114     text_label_->SetFontList(text_label_->font_list().DeriveWithStyle(style));
 115     text_label_->SetDisabledColor(SkColorSetARGB(127, 0, 0, 0));
 116     if (text_default_color_)
 117       text_label_->SetEnabledColor(text_default_color_);
 118     AddChildView(text_label_);
 119
 120     SetAccessibleName(text);
 121     return text_label_;
 122   }
 123   return AddLabel(text, gfx::ALIGN_LEFT, style);
 124 }
 125
 126 void HoverHighlightView::SetExpandable(bool expandable) {
 127   if (expandable != expandable_) {
 128     expandable_ = expandable;
 129     InvalidateLayout();
 130   }
 131 }
 132
 133 bool HoverHighlightView::PerformAction(const ui::Event& event) {
 134   if (!listener_)
 135     return false;
 136   listener_->OnViewClicked(this);
 137   return true;
 138 }
 139
 140 void HoverHighlightView::GetAccessibleState(ui::AXViewState* state) {
 141   ActionableView::GetAccessibleState(state);
 142
 143   if (checkable_) {
 144     state->role = ui::AX_ROLE_CHECK_BOX;
 145     if (checked_)
 146       state->AddStateFlag(ui::AX_STATE_CHECKED);
 147   }
 148 }
 149
 150 gfx::Size HoverHighlightView::GetPreferredSize() const {
 151   gfx::Size size = ActionableView::GetPreferredSize();
 152   if (!expandable_ || size.height() < kTrayPopupItemHeight)
 153     size.set_height(kTrayPopupItemHeight);
 154   return size;
 155 }
 156
 157 int HoverHighlightView::GetHeightForWidth(int width) const {
 158   return GetPreferredSize().height();
 159 }
 160
 161 void HoverHighlightView::OnMouseEntered(const ui::MouseEvent& event) {
 162   hover_ = true;
 163   if (text_highlight_color_ && text_label_)
 164     text_label_->SetEnabledColor(text_highlight_color_);
 165   SchedulePaint();
 166 }
 167
 168 void HoverHighlightView::OnMouseExited(const ui::MouseEvent& event) {
 169   hover_ = false;
 170   if (text_default_color_ && text_label_)
 171     text_label_->SetEnabledColor(text_default_color_);
 172   SchedulePaint();
 173 }
 174
 175 void HoverHighlightView::OnEnabledChanged() {
 176   for (int i = 0; i < child_count(); ++i)
 177     child_at(i)->SetEnabled(enabled());
 178 }
 179
 180 void HoverHighlightView::OnPaintBackground(gfx::Canvas* canvas) {
 181   canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
 182 }
 183
 184 void HoverHighlightView::OnFocus() {
 185   ScrollRectToVisible(gfx::Rect(gfx::Point(), size()));
 186   ActionableView::OnFocus();
 187 }
 188
 189 }  // namespace ash