ui/app_list/views/tile_item_view.cc

   1 // Copyright 2014 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 "ui/app_list/views/tile_item_view.h"
   6
   7 #include "ui/app_list/app_list_constants.h"
   8 #include "ui/app_list/views/app_list_main_view.h"
   9 #include "ui/views/background.h"
  10 #include "ui/views/controls/image_view.h"
  11 #include "ui/views/controls/label.h"
  12 #include "ui/views/layout/box_layout.h"
  13
  14 namespace {
  15
  16 const int kTileSize = 90;
  17 const int kIconTitleSpacing = 6;
  18
  19 }  // namespace
  20
  21 namespace app_list {
  22
  23 TileItemView::TileItemView()
  24     : views::CustomButton(this),
  25       parent_background_color_(SK_ColorTRANSPARENT),
  26       icon_(new views::ImageView),
  27       title_(new views::Label),
  28       selected_(false) {
  29   views::BoxLayout* layout_manager = new views::BoxLayout(
  30       views::BoxLayout::kVertical, 0, 0, kIconTitleSpacing);
  31   layout_manager->set_main_axis_alignment(
  32       views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
  33   SetLayoutManager(layout_manager);
  34
  35   icon_->SetImageSize(gfx::Size(kTileIconSize, kTileIconSize));
  36   // Prevent the icon view from interfering with our mouse events.
  37   icon_->set_interactive(false);
  38
  39   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  40   title_->SetAutoColorReadabilityEnabled(false);
  41   title_->SetEnabledColor(kGridTitleColor);
  42   title_->SetFontList(rb.GetFontList(kItemTextFontStyle));
  43   title_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
  44   title_->SetHandlesTooltips(false);
  45
  46   AddChildView(icon_);
  47   AddChildView(title_);
  48 }
  49
  50 TileItemView::~TileItemView() {
  51 }
  52
  53 void TileItemView::SetSelected(bool selected) {
  54   if (selected == selected_)
  55     return;
  56
  57   selected_ = selected;
  58   UpdateBackgroundColor();
  59
  60   if (selected)
  61     NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
  62 }
  63
  64 void TileItemView::SetParentBackgroundColor(SkColor color) {
  65   parent_background_color_ = color;
  66   UpdateBackgroundColor();
  67 }
  68
  69 void TileItemView::SetIcon(const gfx::ImageSkia& icon) {
  70   icon_->SetImage(icon);
  71 }
  72
  73 void TileItemView::SetTitle(const base::string16& title) {
  74   title_->SetText(title);
  75   SetAccessibleName(title);
  76 }
  77
  78 void TileItemView::StateChanged() {
  79   UpdateBackgroundColor();
  80 }
  81
  82 void TileItemView::UpdateBackgroundColor() {
  83   views::Background* background = nullptr;
  84   SkColor background_color = parent_background_color_;
  85
  86   if (selected_) {
  87     background_color = kSelectedColor;
  88     background = views::Background::CreateSolidBackground(background_color);
  89   } else if (state() == STATE_HOVERED || state() == STATE_PRESSED) {
  90     background_color = kHighlightedColor;
  91     background = views::Background::CreateSolidBackground(background_color);
  92   }
  93
  94   // Tell the label what color it will be drawn onto. It will use whether the
  95   // background color is opaque or transparent to decide whether to use subpixel
  96   // rendering. Does not actually set the label's background color.
  97   title_->SetBackgroundColor(background_color);
  98
  99   set_background(background);
 100   SchedulePaint();
 101 }
 102
 103 gfx::Size TileItemView::GetPreferredSize() const {
 104   return gfx::Size(kTileSize, kTileSize);
 105 }
 106
 107 bool TileItemView::GetTooltipText(const gfx::Point& p,
 108                                   base::string16* tooltip) const {
 109   // Use the label to generate a tooltip, so that it will consider its text
 110   // truncation in making the tooltip. We do not want the label itself to have a
 111   // tooltip, so we only temporarily enable it to get the tooltip text from the
 112   // label, then disable it again.
 113   title_->SetHandlesTooltips(true);
 114   bool handled = title_->GetTooltipText(p, tooltip);
 115   title_->SetHandlesTooltips(false);
 116   return handled;
 117 }
 118
 119 }  // namespace app_list