Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/panel_manager.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 "chrome/browser/ui/panels/panel_manager.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/fullscreen.h"
@@ skipping 50 matching lines @@
   return true;
 }
 
 PanelManager::PanelManager()
     : panel_mouse_watcher_(PanelMouseWatcher::Create()),
       auto_sizing_enabled_(true),
       is_full_screen_(false) {
   detached_strip_.reset(new DetachedPanelStrip(this));
   docked_strip_.reset(new DockedPanelStrip(this));
   overflow_strip_.reset(new OverflowPanelStrip(this));
-  drag_controller_.reset(new PanelDragController());
+  drag_controller_.reset(new PanelDragController(this));
   auto_hiding_desktop_bar_ = AutoHidingDesktopBar::Create(this);
   OnDisplayChanged();
 }
 
 PanelManager::~PanelManager() {
 }
 
 void PanelManager::OnDisplayChanged() {
 #if defined(OS_MACOSX)
   // On OSX, panels should be dropped all the way to the bottom edge of the
@@ skipping 69 matching lines @@
     full_screen_mode_timer_.Stop();
 
   drag_controller_->OnPanelClosed(panel);
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_PANEL_CLOSED,
       content::Source<Panel>(panel),
       content::NotificationService::NoDetails());
 }
 
-void PanelManager::StartDragging(Panel* panel) {
-  drag_controller_->StartDragging(panel);
+void PanelManager::StartDragging(Panel* panel,
+                                 const gfx::Point& mouse_location) {
+  drag_controller_->StartDragging(panel, mouse_location);
 }
 
-void PanelManager::Drag(int delta_x, int delta_y) {
-  drag_controller_->Drag(delta_x, delta_y);
+void PanelManager::Drag(const gfx::Point& mouse_location) {
+  drag_controller_->Drag(mouse_location);
 }
 
 void PanelManager::EndDragging(bool cancelled) {
   drag_controller_->EndDragging(cancelled);
 }
 
 void PanelManager::OnPanelExpansionStateChanged(Panel* panel) {
   docked_strip_->OnPanelExpansionStateChanged(panel);
 }
 
@@ skipping 96 matching lines @@
   return panels;
 }
 
 int PanelManager::overflow_strip_width() const {
   return kOverflowStripThickness;
 }
 
 void PanelManager::SetMouseWatcher(PanelMouseWatcher* watcher) {
   panel_mouse_watcher_.reset(watcher);
 }