Layout panels on top of their launcher icons

ash/launcher/launcher_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.
 
 #include "ash/launcher/launcher_view.h"
 
 #include "ash/launcher/launcher_button.h"
 #include "ash/launcher/launcher_delegate.h"
+#include "ash/launcher/launcher_icons_observer.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/launcher_window_cycler.h"
 #include "ash/launcher/tabbed_launcher_button.h"
 #include "ash/launcher/view_model.h"
 #include "ash/launcher/view_model_utils.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "base/auto_reset.h"
 #include "base/utf_string_conversions.h"
 #include "grit/ash_strings.h"
@@ skipping 302 matching lines @@
   }
 }
 
 int LauncherView::DetermineLastVisibleIndex(int max_x) {
   int index = view_model_->view_size() - 1;
   while (index >= 0 && view_model_->ideal_bounds(index).right() > max_x)
     index--;
   return index;
 }
 
+void LauncherView::AddIconsObserver(LauncherIconsObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void LauncherView::RemoveIconsObserver(LauncherIconsObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
 void LauncherView::AnimateToIdealBounds() {
   IdealBounds ideal_bounds;
   CalculateIdealBounds(&ideal_bounds);
   for (int i = 0; i < view_model_->view_size(); ++i) {
     bounds_animator_->AnimateViewTo(view_model_->view_at(i),
                                     view_model_->ideal_bounds(i));
   }
   overflow_button_->SetBoundsRect(ideal_bounds.overflow_bounds);
+  FOR_EACH_OBSERVER(LauncherIconsObserver, observers_,
+                    OnLauncherIconPositionsChanged());

[sky, 2012/03/23 20:33:12]

What is it you're trying to track?

[Dmitry Lomov (no reviews), 2012/03/23 20:36:00]

The fact that launcher icons changed their positions. I need that so that I can
make panels follow along.

 }
 
 views::View* LauncherView::CreateViewForItem(const LauncherItem& item) {
   views::View* view = NULL;
   switch (item.type) {
     case TYPE_TABBED: {
       TabbedLauncherButton* button =
           TabbedLauncherButton::Create(
               this,
               this,
@@ skipping 399 matching lines @@
   // code.
   if (launcher_menu_runner_->RunMenuAt(
           source->GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
           views::MenuItemView::TOPLEFT, 0) == views::MenuRunner::MENU_DELETED)
     return;
 #endif
 }
 
 }  // namespace internal
 }  // namespace ash