1 // Copyright 2013 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/app_list_folder_item.h"
6
7 #include "base/guid.h"
8 #include "ui/app_list/app_list_constants.h"
9 #include "ui/app_list/app_list_item_list.h"
10 #include "ui/gfx/canvas.h"
11 #include "ui/gfx/image/canvas_image_source.h"
12 #include "ui/gfx/image/image_skia_operations.h"
13
14 namespace app_list {
15
16 namespace {
17
18 const int kItemIconDimension = 16;
19
20 // Generates the folder icon with the top 4 child item icons laid in 2x2 tile.
21 class FolderImageSource : public gfx::CanvasImageSource {
22 public:
23 typedef std::vector<gfx::ImageSkia> Icons;
24
FolderImageSource(const Icons & icons,const gfx::Size & size)25 FolderImageSource(const Icons& icons, const gfx::Size& size)
26 : gfx::CanvasImageSource(size, false),
27 icons_(icons),
28 size_(size) {
29 DCHECK(icons.size() <= kNumFolderTopItems);
30 }
31
~FolderImageSource()32 virtual ~FolderImageSource() {}
33
34 private:
DrawIcon(gfx::Canvas * canvas,const gfx::ImageSkia & icon,const gfx::Size icon_size,int x,int y)35 void DrawIcon(gfx::Canvas* canvas,
36 const gfx::ImageSkia& icon,
37 const gfx::Size icon_size,
38 int x, int y) {
39 if (icon.isNull())
40 return;
41
42 gfx::ImageSkia resized(
43 gfx::ImageSkiaOperations::CreateResizedImage(
44 icon, skia::ImageOperations::RESIZE_BEST, icon_size));
45 canvas->DrawImageInt(resized, 0, 0, resized.width(), resized.height(),
46 x, y, resized.width(), resized.height(), true);
47 }
48
49 // gfx::CanvasImageSource overrides:
Draw(gfx::Canvas * canvas)50 virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
51 // Draw folder circle.
52 gfx::Point center = gfx::Point(size().width() / 2 , size().height() / 2);
53 SkPaint paint;
54 paint.setStyle(SkPaint::kFill_Style);
55 paint.setAntiAlias(true);
56 paint.setColor(kFolderBubbleColor);
57 canvas->DrawCircle(center, size().width() / 2, paint);
58
59 if (icons_.size() == 0)
60 return;
61
62 // Draw top items' icons.
63 const gfx::Size item_icon_size =
64 gfx::Size(kItemIconDimension, kItemIconDimension);
65 Rects top_icon_bounds =
66 AppListFolderItem::GetTopIconsBounds(gfx::Rect(size()));
67
68 for (size_t i= 0; i < kNumFolderTopItems && i < icons_.size(); ++i) {
69 DrawIcon(canvas, icons_[i], item_icon_size,
70 top_icon_bounds[i].x(), top_icon_bounds[i].y());
71 }
72 }
73
74 Icons icons_;
75 gfx::Size size_;
76
77 DISALLOW_COPY_AND_ASSIGN(FolderImageSource);
78 };
79
80 } // namespace
81
AppListFolderItem(const std::string & id,FolderType folder_type)82 AppListFolderItem::AppListFolderItem(const std::string& id,
83 FolderType folder_type)
84 : AppListItem(id),
85 folder_type_(folder_type),
86 item_list_(new AppListItemList) {
87 item_list_->AddObserver(this);
88 }
89
~AppListFolderItem()90 AppListFolderItem::~AppListFolderItem() {
91 for (size_t i = 0; i < top_items_.size(); ++i)
92 top_items_[i]->RemoveObserver(this);
93 item_list_->RemoveObserver(this);
94 }
95
UpdateIcon()96 void AppListFolderItem::UpdateIcon() {
97 FolderImageSource::Icons top_icons;
98 for (size_t i = 0; i < top_items_.size(); ++i)
99 top_icons.push_back(top_items_[i]->icon());
100
101 const gfx::Size icon_size = gfx::Size(kGridIconDimension, kGridIconDimension);
102 gfx::ImageSkia icon = gfx::ImageSkia(
103 new FolderImageSource(top_icons, icon_size),
104 icon_size);
105 SetIcon(icon, false);
106 }
107
GetTopIcon(size_t item_index)108 const gfx::ImageSkia& AppListFolderItem::GetTopIcon(size_t item_index) {
109 DCHECK(item_index <= top_items_.size());
110 return top_items_[item_index]->icon();
111 }
112
GetTargetIconRectInFolderForItem(AppListItem * item,const gfx::Rect & folder_icon_bounds)113 gfx::Rect AppListFolderItem::GetTargetIconRectInFolderForItem(
114 AppListItem* item,
115 const gfx::Rect& folder_icon_bounds) {
116 for (size_t i = 0; i < top_items_.size(); ++i) {
117 if (item->id() == top_items_[i]->id()) {
118 Rects rects = AppListFolderItem::GetTopIconsBounds(folder_icon_bounds);
119 return rects[i];
120 }
121 }
122
123 gfx::Rect target_rect(folder_icon_bounds);
124 target_rect.ClampToCenteredSize(
125 gfx::Size(kItemIconDimension, kItemIconDimension));
126 return target_rect;
127 }
128
Activate(int event_flags)129 void AppListFolderItem::Activate(int event_flags) {
130 // Folder handling is implemented by the View, so do nothing.
131 }
132
133 // static
134 const char AppListFolderItem::kItemType[] = "FolderItem";
135
136 // static
GetTopIconsBounds(const gfx::Rect & folder_icon_bounds)137 Rects AppListFolderItem::GetTopIconsBounds(
138 const gfx::Rect& folder_icon_bounds) {
139 const int delta_to_center = 1;
140 gfx::Point icon_center = folder_icon_bounds.CenterPoint();
141 Rects top_icon_bounds;
142
143 // Get the top left icon bounds.
144 int left_x = icon_center.x() - kItemIconDimension - delta_to_center;
145 int top_y = icon_center.y() - kItemIconDimension - delta_to_center;
146 gfx::Rect top_left(left_x, top_y, kItemIconDimension, kItemIconDimension);
147 top_icon_bounds.push_back(top_left);
148
149 // Get the top right icon bounds.
150 int right_x = icon_center.x() + delta_to_center;
151 gfx::Rect top_right(right_x, top_y, kItemIconDimension, kItemIconDimension);
152 top_icon_bounds.push_back(top_right);
153
154 // Get the bottom left icon bounds.
155 int bottom_y = icon_center.y() + delta_to_center;
156 gfx::Rect bottom_left(
157 left_x, bottom_y, kItemIconDimension, kItemIconDimension);
158 top_icon_bounds.push_back(bottom_left);
159
160 // Get the bottom right icon bounds.
161 gfx::Rect bottom_right(
162 right_x, bottom_y, kItemIconDimension, kItemIconDimension);
163 top_icon_bounds.push_back(bottom_right);
164
165 return top_icon_bounds;
166 }
167
GetItemType() const168 const char* AppListFolderItem::GetItemType() const {
169 return AppListFolderItem::kItemType;
170 }
171
GetContextMenuModel()172 ui::MenuModel* AppListFolderItem::GetContextMenuModel() {
173 // TODO(stevenjb/jennyz): Implement.
174 return NULL;
175 }
176
FindChildItem(const std::string & id)177 AppListItem* AppListFolderItem::FindChildItem(const std::string& id) {
178 return item_list_->FindItem(id);
179 }
180
ChildItemCount() const181 size_t AppListFolderItem::ChildItemCount() const {
182 return item_list_->item_count();
183 }
184
OnExtensionPreferenceChanged()185 void AppListFolderItem::OnExtensionPreferenceChanged() {
186 for (size_t i = 0; i < item_list_->item_count(); ++i)
187 item_list_->item_at(i)->OnExtensionPreferenceChanged();
188 }
189
CompareForTest(const AppListItem * other) const190 bool AppListFolderItem::CompareForTest(const AppListItem* other) const {
191 if (!AppListItem::CompareForTest(other))
192 return false;
193 const AppListFolderItem* other_folder =
194 static_cast<const AppListFolderItem*>(other);
195 if (other_folder->item_list()->item_count() != item_list_->item_count())
196 return false;
197 for (size_t i = 0; i < item_list_->item_count(); ++i) {
198 if (!item_list()->item_at(i)->CompareForTest(
199 other_folder->item_list()->item_at(i)))
200 return false;
201 }
202 return true;
203 }
204
GenerateId()205 std::string AppListFolderItem::GenerateId() {
206 return base::GenerateGUID();
207 }
208
ItemIconChanged()209 void AppListFolderItem::ItemIconChanged() {
210 UpdateIcon();
211 }
212
OnListItemAdded(size_t index,AppListItem * item)213 void AppListFolderItem::OnListItemAdded(size_t index,
214 AppListItem* item) {
215 if (index <= kNumFolderTopItems)
216 UpdateTopItems();
217 }
218
OnListItemRemoved(size_t index,AppListItem * item)219 void AppListFolderItem::OnListItemRemoved(size_t index,
220 AppListItem* item) {
221 if (index <= kNumFolderTopItems)
222 UpdateTopItems();
223 }
224
OnListItemMoved(size_t from_index,size_t to_index,AppListItem * item)225 void AppListFolderItem::OnListItemMoved(size_t from_index,
226 size_t to_index,
227 AppListItem* item) {
228 if (from_index <= kNumFolderTopItems || to_index <= kNumFolderTopItems)
229 UpdateTopItems();
230 }
231
UpdateTopItems()232 void AppListFolderItem::UpdateTopItems() {
233 for (size_t i = 0; i < top_items_.size(); ++i)
234 top_items_[i]->RemoveObserver(this);
235 top_items_.clear();
236
237 for (size_t i = 0;
238 i < kNumFolderTopItems && i < item_list_->item_count(); ++i) {
239 AppListItem* item = item_list_->item_at(i);
240 item->AddObserver(this);
241 top_items_.push_back(item);
242 }
243 UpdateIcon();
244 }
245
246 } // namespace app_list
247