Implement ui for re-parenting an item from an app list folder to another position or folder in the …

ui/app_list/views/folder_header_view.cc

 // Copyright (c) 2013 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/app_list/views/folder_header_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
 #include "grit/ui_strings.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 42 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FolderNameView);
 };
 
 FolderHeaderView::FolderHeaderView(FolderHeaderViewDelegate* delegate)
     : folder_item_(NULL),
       back_button_(new views::ImageButton(this)),
       folder_name_view_(new FolderNameView),
-      delegate_(delegate) {
+      delegate_(delegate),
+      folder_name_visible_(true) {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   back_button_->SetImage(views::ImageButton::STATE_NORMAL,
       rb.GetImageSkiaNamed(IDR_APP_LIST_FOLDER_BACK_NORMAL));
   back_button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
       views::ImageButton::ALIGN_MIDDLE);
   AddChildView(back_button_);
 
   folder_name_view_->SetFontList(
       rb.GetFontList(ui::ResourceBundle::MediumFont));
   folder_name_view_->set_placeholder_text_color(kHintTextColor);
@@ skipping 15 matching lines @@
     folder_item_->RemoveObserver(this);
 
   folder_item_ = folder_item;
   if (!folder_item_)
     return;
   folder_item_->AddObserver(this);
 
   Update();
 }
 
+void FolderHeaderView::UpdateFolderNameVisibility(bool visible) {
+  folder_name_visible_ = visible;
+  Update();
+  SchedulePaint();
+}
+
+void FolderHeaderView::OnFolderItemRemoved() {
+  folder_item_ = NULL;
+}
+
 void FolderHeaderView::Update() {
   if (!folder_item_)
     return;
 
-  folder_name_view_->SetText(base::UTF8ToUTF16(folder_item_->title()));
+  folder_name_view_->SetVisible(folder_name_visible_);
+  if (folder_name_visible_)
+    folder_name_view_->SetText(base::UTF8ToUTF16(folder_item_->title()));
 }
 
 gfx::Size FolderHeaderView::GetPreferredSize() {
   return gfx::Size(kPreferredWidth, kPreferredHeight);
 }
 
 void FolderHeaderView::Layout() {
   gfx::Rect rect(GetContentsBounds());
   if (rect.IsEmpty())
     return;
 
   gfx::Rect back_bounds(rect);
   back_bounds.set_width(kIconDimension + 2 * kPadding);
   back_button_->SetBoundsRect(back_bounds);
 
   gfx::Rect text_bounds(rect);
   int text_width = folder_name_view_->GetPreferredSize().width();
   text_bounds.set_x(back_bounds.x() + (rect.width() - text_width) / 2);
   text_bounds.set_width(text_width);
   text_bounds.ClampToCenteredSize(gfx::Size(text_bounds.width(),
       folder_name_view_->GetPreferredSize().height()));
   folder_name_view_->SetBoundsRect(text_bounds);
 }
 
 void FolderHeaderView::OnPaint(gfx::Canvas* canvas) {
   views::View::OnPaint(canvas);
 
   gfx::Rect rect(GetContentsBounds());
-  if (rect.IsEmpty())
+  if (rect.IsEmpty() || !folder_name_visible_)
     return;
 
   // Draw bottom separator line.
   rect.set_x((rect.width() - kBottomSeparatorWidth) / 2 + rect.x());
   rect.set_y(rect.y() + rect.height() - kBottomSeparatorHeight);
   rect.set_width(kBottomSeparatorWidth);
   rect.set_height(kBottomSeparatorHeight);
   canvas->FillRect(rect, kTopSeparatorColor);
 }
 
@@ skipping 25 matching lines @@
 }
 
 void FolderHeaderView::ItemIsInstallingChanged() {
 }
 
 void FolderHeaderView::ItemPercentDownloadedChanged() {
 }
 
 }  // namespace app_list