Change overview mode to so that docked panel windows are not grouped together.

ash/wm/panels/panel_layout_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 "ash/wm/panels/panel_layout_manager.h"
 
 #include <algorithm>
 #include <map>
 
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shelf/shelf_util.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
+#include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm/window_animations.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/aura/client/focus_client.h"
@@ skipping 228 matching lines @@
 // PanelLayoutManager public implementation:
 PanelLayoutManager::PanelLayoutManager(aura::Window* panel_container)
     : panel_container_(panel_container),
       in_add_window_(false),
       in_layout_(false),
       show_callout_widgets_(true),
       dragged_panel_(NULL),
       shelf_(NULL),
       shelf_layout_manager_(NULL),
       last_active_panel_(NULL),
-      weak_factory_(this) {
+      weak_factory_(this),
+      overview_mode_active_(false) {
   DCHECK(panel_container);
   aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())->
       AddObserver(this);
   Shell::GetInstance()->display_controller()->AddObserver(this);
   Shell::GetInstance()->AddShellObserver(this);
 }
 
 PanelLayoutManager::~PanelLayoutManager() {
   Shutdown();
 }
@@ skipping 180 matching lines @@
 void PanelLayoutManager::OnShelfIconPositionsChanged() {
   // TODO: As this is called for every animation step now. Relayout needs to be
   // updated to use current icon position instead of use the ideal bounds so
   // that the panels slide with their icons instead of jumping.
   Relayout();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // PanelLayoutManager, ash::ShellObserver implementation:
 
+void PanelLayoutManager::OnOverviewModeStarting() {
+  overview_mode_active_ = true;
+}
+
+void PanelLayoutManager::OnOverviewModeEnding() {
+  overview_mode_active_ = false;
+  Relayout();
+}
+
 void PanelLayoutManager::OnShelfAlignmentChanged(aura::Window* root_window) {
   if (panel_container_->GetRootWindow() == root_window)
     Relayout();
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // PanelLayoutManager, WindowObserver implementation:
 
 void PanelLayoutManager::OnWindowPropertyChanged(aura::Window* window,
                                                  const void* key,
@@ skipping 115 matching lines @@
       std::find(panel_windows_.begin(), panel_windows_.end(), panel);
   DCHECK(found != panel_windows_.end());
   found->slide_in = true;
   Relayout();
 }
 
 void PanelLayoutManager::Relayout() {
   if (!shelf_ || !shelf_->shelf_widget())
     return;
 
-  if (in_layout_)
+  // Suppress layouts during overview mode because changing window bounds
+  // interfered with overview mode animations. However, layouts need to be done
+  // when the WindowSelectorController is restoring minimized windows so that
+  // they actually become visible.
+  if (in_layout_ || (overview_mode_active_ && !Shell::GetInstance()->
+      window_selector_controller()->IsRestoringMinimizedWindows()))
     return;
   base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
 
   ShelfAlignment alignment = shelf_->shelf_widget()->GetAlignment();
   bool horizontal = alignment == SHELF_ALIGNMENT_TOP ||
                     alignment == SHELF_ALIGNMENT_BOTTOM;
   gfx::Rect shelf_bounds = ash::ScreenUtil::ConvertRectFromScreen(
       panel_container_, shelf_->shelf_widget()->GetWindowBoundsInScreen());
   int panel_start_bounds = kPanelIdealSpacing;
   int panel_end_bounds = horizontal ?
@@ skipping 323 matching lines @@
       // Keyboard hidden, restore original bounds if they exist.
       SetChildBounds(panel, panel_state->GetRestoreBoundsInScreen());
     }
   }
   // This bounds change will have caused a change to the Shelf which does not
   // propogate automatically to this class, so manually recalculate bounds.
   OnWindowResized();
 }
 
 }  // namespace ash