Beginnings of Window Modality support.

ui/aura_shell/transient_container_layout_manager.h

+// Copyright (c) 2011 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.
+
+#ifndef UI_AURA_SHELL_TRANSIENT_CONTAINER_LAYOUT_MANAGER_H_
+#define UI_AURA_SHELL_TRANSIENT_CONTAINER_LAYOUT_MANAGER_H_
+#pragma once
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/layout_manager.h"
+#include "ui/aura/window_observer.h"
+#include "ui/aura_shell/aura_shell_export.h"
+#include "ui/aura_shell/modality_event_filter.h"
+#include "ui/gfx/compositor/layer_animation_observer.h"
+
+namespace aura {
+class Window;
+class EventFilter;
+}
+namespace gfx {
+class Rect;
+}
+namespace views {
+class Widget;
+}
+
+namespace aura_shell {
+namespace internal {
+
+// LayoutManager for the transient window container.
+class AURA_SHELL_EXPORT TransientContainerLayoutManager
+    : public aura::LayoutManager,
+      public aura::WindowObserver,
+      public ui::LayerAnimationObserver,
+      public ModalityEventFilter::Delegate {
+ public:
+  explicit TransientContainerLayoutManager(aura::Window* container);
+  virtual ~TransientContainerLayoutManager();
+
+  // Overridden from aura::LayoutManager:
+  virtual void OnWindowResized() OVERRIDE;
+  virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
+  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
+  virtual void OnChildWindowVisibilityChanged(aura::Window* child,
+                                              bool visibile) OVERRIDE;
+  virtual void SetChildBounds(aura::Window* child,
+                              const gfx::Rect& requested_bounds) OVERRIDE;
+
+  // Overridden from aura::WindowObserver:
+  virtual void OnPropertyChanged(aura::Window* window,
+                                 const char* key,
+                                 void* old) OVERRIDE;
+
+  // Overridden from ui::LayerAnimationObserver:
+  virtual void OnLayerAnimationEnded(
+      const ui::LayerAnimationSequence* sequence) OVERRIDE;
+  virtual void OnLayerAnimationAborted(
+      const ui::LayerAnimationSequence* sequence) OVERRIDE;
+  virtual void OnLayerAnimationScheduled(
+      const ui::LayerAnimationSequence* sequence) OVERRIDE;
+
+  // Overridden from ModalityEventFilter::Delegate:
+  virtual bool CanWindowReceiveEvents(aura::Window* window) OVERRIDE;
+
+ private:
+  void AddModalWindow(aura::Window* window);
+  void RemoveModalWindow(aura::Window* window);
+
+  void CreateModalScreen();
+  void DestroyModalScreen();
+  void HideModalScreen();
+
+  aura::Window* modal_window() {
+    return !modal_windows_.empty() ? modal_windows_.back() : NULL;
+  }
+
+  aura::Window* container_;
+  views::Widget* modal_screen_;

[sky, 2011/11/16 17:13:06]

Add a description for these. At least modal_screen_ and modality_filter_.

+  std::vector<aura::Window*> modal_windows_;
+  scoped_ptr<aura::EventFilter> modality_filter_;
+
+  DISALLOW_COPY_AND_ASSIGN(TransientContainerLayoutManager);
+};
+
+}  // namespace internal
+}  // namespace aura_shell
+
+#endif  // UI_AURA_SHELL_TRANSIENT_CONTAINER_LAYOUT_MANAGER_H_