Experimental alignment layout manager using a property on the views

ui/views/view.cc

 // Copyright (c) 2012 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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 87 matching lines @@
 
 // Creation and lifetime -------------------------------------------------------
 
 View::View()
     : owned_by_client_(false),
       id_(0),
       group_(-1),
       parent_(NULL),
       visible_(true),
       enabled_(true),
+      attributes_(this),
       notify_enter_exit_on_child_(false),
       registered_for_visible_bounds_notification_(false),
       needs_layout_(true),
       snap_layer_to_pixel_boundary_(false),
       flip_canvas_on_paint_for_rtl_ui_(false),
       paint_to_layer_(false),
       accelerator_focus_manager_(NULL),
       registered_accelerator_count_(0),
       next_focusable_view_(NULL),
       previous_focusable_view_(NULL),
@@ skipping 1733 matching lines @@
   ViewHierarchyChangedDetails details(false, old_parent, this, new_parent);
   for (View* v = this; v; v = v->parent_)
     v->ViewHierarchyChangedImpl(true, details);
 }
 
 void View::PropagateAddNotifications(
     const ViewHierarchyChangedDetails& details) {
   for (int i = 0, count = child_count(); i < count; ++i)
     child_at(i)->PropagateAddNotifications(details);
   ViewHierarchyChangedImpl(true, details);
+  attributes_.ViewNotification(this);
 }
 
 void View::PropagateNativeViewHierarchyChanged() {
   for (int i = 0, count = child_count(); i < count; ++i)
     child_at(i)->PropagateNativeViewHierarchyChanged();
   NativeViewHierarchyChanged();
 }
 
 void View::ViewHierarchyChangedImpl(
     bool register_accelerators,
@@ skipping 76 matching lines @@
     OnVisibleBoundsChanged();
 
   // Notify interested Views that visible bounds within the root view may have
   // changed.
   if (descendants_to_notify_.get()) {
     for (Views::iterator i(descendants_to_notify_->begin());
          i != descendants_to_notify_->end(); ++i) {
       (*i)->OnVisibleBoundsChanged();
     }
   }
+  attributes_.ViewNotification(this);
 }
 
 // static
 void View::RegisterChildrenForVisibleBoundsNotification(View* view) {
   if (view->GetNeedsNotificationWhenVisibleBoundsChange())
     view->RegisterForVisibleBoundsNotification();
   for (int i = 0; i < view->child_count(); ++i)
     RegisterChildrenForVisibleBoundsNotification(view->child_at(i));
 }
 
@@ skipping 451 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views