[Aura] Implement views-based applist.

ui/aura_shell/app_list/tile_view.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/aura_shell/app_list/tile_view.h"
+
+#include "base/utf_string_conversions.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/font.h"
+#include "ui/aura_shell/app_list/app_list_view.h"
+#include "ui/aura_shell/app_list/app_list_item_model.h"
+#include "ui/aura_shell/app_list/drop_shadow_label.h"
+#include "ui/aura_shell/app_list/tiles_page_view.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/widget/widget.h"
+#include "third_party/skia/include/core/SkColor.h"
+
+namespace aura_shell {
+
+namespace {
+
+const double kFocusedScale = 1.1;
+
+// TitleLabel for a TileView.
+class TitleLabel : public DropShadowLabel {
+ public:
+  TitleLabel() {
+    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+    SetFont(rb.GetFont(ResourceBundle::BaseFont).DeriveFont(
+        2, gfx::Font::BOLD));
+    SetBackgroundColor(0);
+    SetEnabledColor(SK_ColorWHITE);
+  }
+
+  virtual ~TitleLabel() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TitleLabel);
+};
+
+}  // namespace
+
+TileView::TileView(AppListItemModel* model)
+    : model_(model),
+      icon_(new views::ImageView),
+      label_(new TitleLabel) {
+  set_focusable(true);
+
+  AddChildView(icon_);
+  ItemIconChanged();
+
+  AddChildView(label_);
+  ItemTitleChanged();
+
+  model_->AddObserver(this);
+}
+
+TileView::~TileView() {
+  model_->RemoveObserver(this);
+}
+
+void TileView::ItemIconChanged() {
+  icon_->SetImage(model_->icon());
+}
+
+void TileView::ItemTitleChanged() {
+  label_->SetText(UTF8ToUTF16(model_->title()));
+}
+
+void TileView::Activate(int event_flags) {
+  model_->Activate(event_flags);
+  static_cast<AppListView*>(GetWidget()->widget_delegate())->Close();
+}
+
+gfx::Size TileView::GetPreferredSize() {
+  return gfx::Size(kTileSize, kTileSize);
+}
+
+void TileView::Layout() {
+  gfx::Rect rect(GetContentsBounds());
+
+  gfx::Size title_size = label_->GetPreferredSize();
+
+  if (!HasFocus()) {
+    const int horiz_padding = (kTileSize - kIconSize) / 2;
+    const int vert_padding = (kTileSize - title_size.height() - kIconSize) / 2;
+    rect.Inset(horiz_padding, vert_padding);
+  }
+
+  icon_->SetBounds(rect.x(), rect.y(),
+      rect.width(), rect.height() - title_size.height());
+
+  label_->SetBounds(rect.x(), rect.bottom() - title_size.height(),
+      rect.width(), title_size.height());
+}
+
+void TileView::OnFocus() {
+  gfx::Size icon_size = icon_->GetPreferredSize();
+  icon_size.set_width(icon_size.width() * kFocusedScale);
+  icon_size.set_height(icon_size.height() * kFocusedScale);
+
+  gfx::Size max_size = GetPreferredSize();
+  if (icon_size.width() > max_size.width() ||
+      icon_size.height() > max_size.height()) {
+    double aspect =
+        static_cast<double>(icon_size.width()) / icon_size.height();
+
+    if (aspect > 1) {
+      icon_size.set_width(max_size.width());
+      icon_size.set_height(icon_size.width() / aspect);
+    } else {
+      icon_size.set_height(max_size.height());
+      icon_size.set_width(icon_size.height() * aspect);
+    }
+  }
+
+  icon_->SetImageSize(icon_size);
+  Layout();
+
+  TilesPageView* tiles_page = static_cast<TilesPageView*>(parent());
+  tiles_page->UpdateFocusedTile(this);
+
+  View::OnFocus();
+}
+
+void TileView::OnBlur() {
+  icon_->ResetImageSize();
+  Layout();
+  SchedulePaint();
+}
+
+bool TileView::OnKeyPressed(const views::KeyEvent& event) {
+  if (event.key_code() == ui::VKEY_RETURN) {
+    Activate(event.flags());
+    return true;
+  }
+
+  return false;
+}
+
+bool TileView::OnMousePressed(const views::MouseEvent& event) {
+  views::View* hit_view = GetEventHandlerForPoint(event.location());
+  bool hit = hit_view != this;
+  if (hit)
+    RequestFocus();
+
+  return hit;
+}
+
+void TileView::OnMouseReleased(const views::MouseEvent& event) {
+  views::View* hit_view = GetEventHandlerForPoint(event.location());
+  if (hit_view != this)
+    Activate(event.flags());
+}
+
+void TileView::OnPaintFocusBorder(gfx::Canvas* canvas) {
+  // No focus border for TileView.
+}
+
+}  // namespace aura_shell