Revert "views: Move widget/ directory to ui/views." properly.

views/widget/widget.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 VIEWS_WIDGET_WIDGET_H_
+#define VIEWS_WIDGET_WIDGET_H_
+#pragma once
+
+#include <set>
+#include <stack>
+
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
+#include "ui/base/accessibility/accessibility_types.h"
+#include "ui/base/ui_base_types.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/rect.h"
+#include "ui/views/focus/focus_manager.h"
+#include "ui/views/window/client_view.h"
+#include "ui/views/window/non_client_view.h"
+#include "views/widget/native_widget_delegate.h"
+
+#if defined(OS_WIN)
+// Windows headers define macros for these function names which screw with us.
+#if defined(IsMaximized)
+#undef IsMaximized
+#endif
+#if defined(IsMinimized)
+#undef IsMinimized
+#endif
+#if defined(CreateWindow)
+#undef CreateWindow
+#endif
+#endif
+
+namespace gfx {
+class Canvas;
+class Point;
+class Rect;
+}
+
+namespace ui {
+class Accelerator;
+class Compositor;
+class OSExchangeData;
+class ThemeProvider;
+enum TouchStatus;
+}
+using ui::ThemeProvider;
+
+namespace views {
+
+class DefaultThemeProvider;
+class InputMethod;
+class NativeWidget;
+class NonClientFrameView;
+class ScopedEvent;
+class View;
+class WidgetDelegate;
+namespace internal {
+class NativeWidgetPrivate;
+class RootView;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Widget class
+//
+//  Encapsulates the platform-specific rendering, event receiving and widget
+//  management aspects of the UI framework.
+//
+//  Owns a RootView and thus a View hierarchy. Can contain child Widgets.
+//  Widget is a platform-independent type that communicates with a platform or
+//  context specific NativeWidget implementation.
+//
+//  A special note on ownership:
+//
+//    Depending on the value of the InitParams' ownership field, the Widget
+//    either owns or is owned by its NativeWidget:
+//
+//    ownership = NATIVE_WIDGET_OWNS_WIDGET (default)
+//      The Widget instance is owned by its NativeWidget. When the NativeWidget
+//      is destroyed (in response to a native destruction message), it deletes
+//      the Widget from its destructor.
+//    ownership = WIDGET_OWNS_NATIVE_WIDGET (non-default)
+//      The Widget instance owns its NativeWidget. This state implies someone
+//      else wants to control the lifetime of this object. When they destroy
+//      the Widget it is responsible for destroying the NativeWidget (from its
+//      destructor).
+//
+class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
+                            public FocusTraversable {
+ public:
+  // Observers can listen to various events on the Widgets.
+  class VIEWS_EXPORT Observer {
+   public:
+    virtual void OnWidgetClosing(Widget* widget) {}
+    virtual void OnWidgetVisibilityChanged(Widget* widget, bool visible) {}
+    virtual void OnWidgetActivationChanged(Widget* widget, bool active) {}
+  };
+
+  typedef std::set<Widget*> Widgets;
+
+  enum FrameType {
+    FRAME_TYPE_DEFAULT,         // Use whatever the default would be.
+    FRAME_TYPE_FORCE_CUSTOM,    // Force the custom frame.
+    FRAME_TYPE_FORCE_NATIVE     // Force the native frame.
+  };
+
+  struct VIEWS_EXPORT InitParams {
+    enum Type {
+      TYPE_WINDOW,      // A decorated Window, like a frame window.
+                        // Widgets of TYPE_WINDOW will have a NonClientView.
+      TYPE_WINDOW_FRAMELESS,
+                        // An undecorated Window.
+      TYPE_CONTROL,     // A control, like a button.
+      TYPE_POPUP,       // An undecorated Window, with transient properties.
+      TYPE_MENU,        // An undecorated Window, with transient properties
+                        // specialized to menus.
+      TYPE_TOOLTIP,
+      TYPE_BUBBLE,
+    };
+    enum Ownership {
+      // Default. Creator is not responsible for managing the lifetime of the
+      // Widget, it is destroyed when the corresponding NativeWidget is
+      // destroyed.
+      NATIVE_WIDGET_OWNS_WIDGET,
+      // Used when the Widget is owned by someone other than the NativeWidget,
+      // e.g. a scoped_ptr in tests.
+      WIDGET_OWNS_NATIVE_WIDGET
+    };
+
+    InitParams();
+    explicit InitParams(Type type);
+
+    // If |parent_widget| is non-null, it's native view is returned, otherwise
+    // |parent| is returned.
+    gfx::NativeView GetParent() const;
+
+    Type type;
+    // If NULL, a default implementation will be constructed.
+    WidgetDelegate* delegate;
+    bool child;
+    bool transient;
+    // If true, the widget may be fully or partially transparent.  If false,
+    // we can perform optimizations based on the widget being fully opaque.
+    // Defaults to false.
+    bool transparent;
+    bool accept_events;
+    bool can_activate;
+    bool keep_on_top;
+    Ownership ownership;
+    bool mirror_origin_in_rtl;
+    bool has_dropshadow;
+    // Whether the widget should be maximized or minimized.
+    ui::WindowShowState show_state;
+    // Should the widget be double buffered? Default is false.
+    bool double_buffer;
+    gfx::NativeView parent;
+    Widget* parent_widget;
+    // Specifies the initial bounds of the Widget. Default is empty, which means
+    // the NativeWidget may specify a default size.
+    gfx::Rect bounds;
+    // When set, this value is used as the Widget's NativeWidget implementation.
+    // The Widget will not construct a default one. Default is NULL.
+    NativeWidget* native_widget;
+    bool top_level;
+    // Only used by NativeWidgetAura. Specifies whether the Layer created by
+    // aura::Window has a texture. The default is true.
+    bool create_texture_for_layer;
+  };
+
+  Widget();
+  virtual ~Widget();
+
+  // Creates a decorated window Widget with the specified properties.
+  static Widget* CreateWindow(WidgetDelegate* delegate);
+  static Widget* CreateWindowWithParent(WidgetDelegate* delegate,
+                                        gfx::NativeWindow parent);
+  static Widget* CreateWindowWithBounds(WidgetDelegate* delegate,
+                                        const gfx::Rect& bounds);
+  static Widget* CreateWindowWithParentAndBounds(WidgetDelegate* delegate,
+                                                 gfx::NativeWindow parent,
+                                                 const gfx::Rect& bounds);
+
+  // Enumerates all windows pertaining to us and notifies their
+  // view hierarchies that the locale has changed.
+  static void NotifyLocaleChanged();
+
+  // Closes all Widgets that aren't identified as "secondary widgets". Called
+  // during application shutdown when the last non-secondary widget is closed.
+  static void CloseAllSecondaryWidgets();
+
+  // Converts a rectangle from one Widget's coordinate system to another's.
+  // Returns false if the conversion couldn't be made, because either these two
+  // Widgets do not have a common ancestor or they are not on the screen yet.
+  // The value of |*rect| won't be changed when false is returned.
+  static bool ConvertRect(const Widget* source,
+                          const Widget* target,
+                          gfx::Rect* rect);
+
+  // SetPureViews and IsPureViews update and return the state of a global
+  // setting that tracks whether to use available pure Views implementations.
+  static void SetPureViews(bool pure);
+  static bool IsPureViews();
+
+  // Retrieves the Widget implementation associated with the given
+  // NativeView or Window, or NULL if the supplied handle has no associated
+  // Widget.
+  static Widget* GetWidgetForNativeView(gfx::NativeView native_view);
+  static Widget* GetWidgetForNativeWindow(gfx::NativeWindow native_window);
+
+  // Retrieves the top level widget in a native view hierarchy
+  // starting at |native_view|. Top level widget is a widget with
+  // TYPE_WINDOW, TYPE_WINDOW_FRAMELESS, POPUP or MENU and has its own
+  // focus manager. This may be itself if the |native_view| is top level,
+  // or NULL if there is no toplevel in a native view hierarchy.
+  static Widget* GetTopLevelWidgetForNativeView(gfx::NativeView native_view);
+
+  // Returns all Widgets in |native_view|'s hierarchy, including itself if
+  // it is one.
+  static void GetAllChildWidgets(gfx::NativeView native_view,
+                                 Widgets* children);
+
+  // Re-parent a NativeView and notify all Widgets in |native_view|'s hierarchy
+  // of the change.
+  static void ReparentNativeView(gfx::NativeView native_view,
+                                 gfx::NativeView new_parent);
+
+  // Returns the preferred size of the contents view of this window based on
+  // its localized size data. The width in cols is held in a localized string
+  // resource identified by |col_resource_id|, the height in the same fashion.
+  // TODO(beng): This should eventually live somewhere else, probably closer to
+  //             ClientView.
+  static int GetLocalizedContentsWidth(int col_resource_id);
+  static int GetLocalizedContentsHeight(int row_resource_id);
+  static gfx::Size GetLocalizedContentsSize(int col_resource_id,
+                                            int row_resource_id);
+
+  // Enable/Disable debug paint.
+  static void SetDebugPaintEnabled(bool enabled);
+  static bool IsDebugPaintEnabled();
+
+  // Returns true if the specified type requires a NonClientView.
+  static bool RequiresNonClientView(InitParams::Type type);
+
+  void Init(const InitParams& params);
+
+  // Returns the gfx::NativeView associated with this Widget.
+  gfx::NativeView GetNativeView() const;
+
+  // Returns the gfx::NativeWindow associated with this Widget. This may return
+  // NULL on some platforms if the widget was created with a type other than
+  // TYPE_WINDOW.
+  gfx::NativeWindow GetNativeWindow() const;
+
+  // Add/remove observer.
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+  bool HasObserver(Observer* observer);
+
+  // Returns the accelerator given a command id. Returns false if there is
+  // no accelerator associated with a given id, which is a common condition.
+  virtual bool GetAccelerator(int cmd_id, ui::Accelerator* accelerator);
+
+  // Forwarded from the RootView so that the widget can do any cleanup.
+  void ViewHierarchyChanged(bool is_add, View* parent, View* child);
+
+  // Performs any necessary cleanup and forwards to RootView.
+  void NotifyNativeViewHierarchyChanged(bool attached,
+                                        gfx::NativeView native_view);
+
+  // Returns the top level widget in a hierarchy (see is_top_level() for
+  // the definition of top level widget.) Will return NULL if called
+  // before the widget is attached to the top level widget's hierarchy.
+  Widget* GetTopLevelWidget();
+  const Widget* GetTopLevelWidget() const;
+
+  // Gets/Sets the WidgetDelegate.
+  WidgetDelegate* widget_delegate() const { return widget_delegate_; }
+
+  // Sets the specified view as the contents of this Widget. There can only
+  // be one contents view child of this Widget's RootView. This view is sized to
+  // fit the entire size of the RootView. The RootView takes ownership of this
+  // View, unless it is set as not being parent-owned.
+  void SetContentsView(View* view);
+  View* GetContentsView();
+
+  // Returns the bounds of the Widget in screen coordinates.
+  gfx::Rect GetWindowScreenBounds() const;
+
+  // Returns the bounds of the Widget's client area in screen coordinates.
+  gfx::Rect GetClientAreaScreenBounds() const;
+
+  // Retrieves the restored bounds for the window.
+  gfx::Rect GetRestoredBounds() const;
+
+  // Sizes and/or places the widget to the specified bounds, size or position.
+  void SetBounds(const gfx::Rect& bounds);
+  void SetSize(const gfx::Size& size);
+
+  // Like SetBounds(), but ensures the Widget is fully visible on screen,
+  // resizing and/or repositioning as necessary. This is only useful for
+  // non-child widgets.
+  void SetBoundsConstrained(const gfx::Rect& bounds);
+
+  // Places the widget in front of the specified widget in z-order.
+  void MoveAboveWidget(Widget* widget);
+  void MoveAbove(gfx::NativeView native_view);
+  void MoveToTop();
+
+  // Sets a shape on the widget. This takes ownership of shape.
+  void SetShape(gfx::NativeRegion shape);
+
+  // Hides the widget then closes it after a return to the message loop.
+  virtual void Close();
+
+  // TODO(beng): Move off public API.
+  // Closes the widget immediately. Compare to |Close|. This will destroy the
+  // window handle associated with this Widget, so should not be called from
+  // any code that expects it to be valid beyond this call.
+  void CloseNow();
+
+  // Toggles the enable state for the Close button (and the Close menu item in
+  // the system menu).
+  void EnableClose(bool enable);
+
+  // Shows or hides the widget, without changing activation state.
+  virtual void Show();
+  void Hide();
+
+  // Like Show(), but does not activate the window.
+  void ShowInactive();
+
+  // Activates the widget, assuming it already exists and is visible.
+  void Activate();
+
+  // Deactivates the widget, making the next window in the Z order the active
+  // window.
+  void Deactivate();
+
+  // Returns whether the Widget is the currently active window.
+  virtual bool IsActive() const;
+
+  // Prevents the window from being rendered as deactivated. This state is
+  // reset automatically as soon as the window becomes activated again. There is
+  // no ability to control the state through this API as this leads to sync
+  // problems.
+  void DisableInactiveRendering();
+
+  // Sets the widget to be on top of all other widgets in the windowing system.
+  void SetAlwaysOnTop(bool on_top);
+
+  // Maximizes/minimizes/restores the window.
+  void Maximize();
+  void Minimize();
+  void Restore();
+
+  // Whether or not the window is maximized or minimized.
+  virtual bool IsMaximized() const;
+  bool IsMinimized() const;
+
+  // Accessors for fullscreen state.
+  void SetFullscreen(bool fullscreen);
+  bool IsFullscreen() const;
+
+  // Sets the opacity of the widget. This may allow widgets behind the widget
+  // in the Z-order to become visible, depending on the capabilities of the
+  // underlying windowing system. Note that the caller must then schedule a
+  // repaint to allow this change to take effect.
+  void SetOpacity(unsigned char opacity);
+
+  // Sets whether or not the window should show its frame as a "transient drag
+  // frame" - slightly transparent and without the standard window controls.
+  void SetUseDragFrame(bool use_drag_frame);
+
+  // Returns the View at the root of the View hierarchy contained by this
+  // Widget.
+  View* GetRootView();
+  const View* GetRootView() const;
+
+  // A secondary widget is one that is automatically closed (via Close()) when
+  // all non-secondary widgets are closed.
+  // Default is true.
+  // TODO(beng): This is an ugly API, should be handled implicitly via
+  //             transience.
+  void set_is_secondary_widget(bool is_secondary_widget) {
+    is_secondary_widget_ = is_secondary_widget;
+  }
+  bool is_secondary_widget() const { return is_secondary_widget_; }
+
+  // Returns whether the Widget is visible to the user.
+  virtual bool IsVisible() const;
+
+  // Returns whether the Widget is customized for accessibility.
+  bool IsAccessibleWidget() const;
+
+  // Returns the ThemeProvider that provides theme resources for this Widget.
+  virtual ThemeProvider* GetThemeProvider() const;
+
+  // Returns the FocusManager for this widget.
+  // Note that all widgets in a widget hierarchy share the same focus manager.
+  // TODO(beng): remove virtual.
+  virtual FocusManager* GetFocusManager();
+  virtual const FocusManager* GetFocusManager() const;
+
+  // Returns the InputMethod for this widget.
+  // Note that all widgets in a widget hierarchy share the same input method.
+  InputMethod* GetInputMethod();
+
+  // Starts a drag operation for the specified view. This blocks until the drag
+  // operation completes. |view| can be NULL.
+  // If the view is non-NULL it can be accessed during the drag by calling
+  // dragged_view(). If the view has not been deleted during the drag,
+  // OnDragDone() is called on it.
+  void RunShellDrag(View* view, const ui::OSExchangeData& data, int operation);
+
+  // Returns the view that requested the current drag operation via
+  // RunShellDrag(), or NULL if there is no such view or drag operation.
+  View* dragged_view() { return dragged_view_; }
+
+  // Adds the specified |rect| in client area coordinates to the rectangle to be
+  // redrawn.
+  void SchedulePaintInRect(const gfx::Rect& rect);
+
+  // Sets the currently visible cursor. If |cursor| is NULL, the cursor used
+  // before the current is restored.
+  void SetCursor(gfx::NativeCursor cursor);
+
+  // Resets the last move flag so that we can go around the optimization
+  // that disregards duplicate mouse moves when ending animation requires
+  // a new hit-test to do some highlighting as in TabStrip::RemoveTabAnimation
+  // to cause the close button to highlight.
+  void ResetLastMouseMoveFlag();
+
+  // Sets/Gets a native window property on the underlying native window object.
+  // Returns NULL if the property does not exist. Setting the property value to
+  // NULL removes the property.
+  void SetNativeWindowProperty(const char* name, void* value);
+  void* GetNativeWindowProperty(const char* name) const;
+
+  // Tell the window to update its title from the delegate.
+  void UpdateWindowTitle();
+
+  // Tell the window to update its icon from the delegate.
+  void UpdateWindowIcon();
+
+  // Retrieves the focus traversable for this widget.
+  FocusTraversable* GetFocusTraversable();
+
+  // Notifies the view hierarchy contained in this widget that theme resources
+  // changed.
+  void ThemeChanged();
+
+  // Notifies the view hierarchy contained in this widget that locale resources
+  // changed.
+  void LocaleChanged();
+
+  void SetFocusTraversableParent(FocusTraversable* parent);
+  void SetFocusTraversableParentView(View* parent_view);
+
+  // Clear native focus set to the Widget's NativeWidget.
+  void ClearNativeFocus();
+
+  // Sets the focus to |native_view|.
+  void FocusNativeView(gfx::NativeView native_view);
+
+  // Updates the frame after an event caused it to be changed.
+  virtual void UpdateFrameAfterFrameChange();
+
+  void set_frame_type(FrameType frame_type) { frame_type_ = frame_type; }
+  FrameType frame_type() const { return frame_type_; }
+
+  // Creates an appropriate NonClientFrameView for this widget. The
+  // WidgetDelegate is given the first opportunity to create one, followed by
+  // the NativeWidget implementation. If both return NULL, a default one is
+  // created.
+  virtual NonClientFrameView* CreateNonClientFrameView();
+
+  // Whether we should be using a native frame.
+  bool ShouldUseNativeFrame() const;
+
+  // Forces the frame into the alternate frame type (custom or native) depending
+  // on its current state.
+  void DebugToggleFrameType();
+
+  // Tell the window that something caused the frame type to change.
+  void FrameTypeChanged();
+
+  NonClientView* non_client_view() {
+    return const_cast<NonClientView*>(
+        const_cast<const Widget*>(this)->non_client_view());
+  }
+  const NonClientView* non_client_view() const {
+    return non_client_view_;
+  }
+
+  ClientView* client_view() {
+    return const_cast<ClientView*>(
+        const_cast<const Widget*>(this)->client_view());
+  }
+  const ClientView* client_view() const {
+    // non_client_view_ may be NULL, especially during creation.
+    return non_client_view_ ? non_client_view_->client_view() : NULL;
+  }
+
+  const ui::Compositor* GetCompositor() const;
+  ui::Compositor* GetCompositor();
+
+  // Invokes method of same name on the NativeWidget.
+  void CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
+                                          ui::Layer** layer_parent);
+
+  // Invokes method of same name on the NativeWidget.
+  void ReorderLayers();
+
+  // Notifies assistive technology that an accessibility event has
+  // occurred on |view|, such as when the view is focused or when its
+  // value changes. Pass true for |send_native_event| except for rare
+  // cases where the view is a native control that's already sending a
+  // native accessibility event and the duplicate event would cause
+  // problems.
+  void NotifyAccessibilityEvent(
+      View* view,
+      ui::AccessibilityTypes::Event event_type,
+      bool send_native_event);
+
+  const NativeWidget* native_widget() const;
+  NativeWidget* native_widget();
+
+  internal::NativeWidgetPrivate* native_widget_private() {
+    return native_widget_;
+  }
+  const internal::NativeWidgetPrivate* native_widget_private() const {
+    return native_widget_;
+  }
+
+  // Returns the current event being processed. If there are multiple events
+  // being processed at the same time (e.g. one event triggers another event),
+  // then the most recent event is returned. Returns NULL if no event is being
+  // processed.
+  const Event* GetCurrentEvent();
+
+  // Invoked when the tooltip text changes for the specified views.
+  void TooltipTextChanged(View* view);
+
+  // Sets-up the focus manager with the view that should have focus when the
+  // window is shown the first time.  Returns true if the initial focus has been
+  // set or the widget should not set the initial focus, or false if the caller
+  // should set the initial focus (if any).
+  bool SetInitialFocus();
+
+  void set_focus_on_creation(bool focus_on_creation) {
+    focus_on_creation_ = focus_on_creation;
+  }
+
+  // Converts the |point| in ancestor's coordinate to this widget's coordinates.
+  // Returns false if |ancestor| is not an ancestor of this widget.
+  // The receiver has to be pure views widget (NativeWidgetViews) and
+  // ancestor can be of any type.
+  bool ConvertPointFromAncestor(
+      const Widget* ancestor, gfx::Point* point) const;
+
+  // Returns a View* that any child Widgets backed by NativeWidgetViews
+  // are added to.  The default implementation returns the contents view
+  // if it exists and the root view otherwise.
+  virtual View* GetChildViewParent();
+
+  // True if the widget is considered top level widget. Top level widget
+  // is a widget of TYPE_WINDOW, TYPE_WINDOW_FRAMELESS, BUBBLE, POPUP or MENU,
+  // and has a focus manager and input method object associated with it.
+  // TYPE_CONTROL and TYPE_TOOLTIP is not considered top level.
+  bool is_top_level() const { return is_top_level_; }
+
+  // Returns the bounds of work area in the screen that Widget belongs to.
+  gfx::Rect GetWorkAreaBoundsInScreen() const;
+
+  // Overridden from NativeWidgetDelegate:
+  virtual bool IsModal() const OVERRIDE;
+  virtual bool IsDialogBox() const OVERRIDE;
+  virtual bool CanActivate() const OVERRIDE;
+  virtual bool IsInactiveRenderingDisabled() const OVERRIDE;
+  virtual void EnableInactiveRendering() OVERRIDE;
+  virtual void OnNativeWidgetActivationChanged(bool active) OVERRIDE;
+  virtual void OnNativeFocus(gfx::NativeView focused_view) OVERRIDE;
+  virtual void OnNativeBlur(gfx::NativeView focused_view) OVERRIDE;
+  virtual void OnNativeWidgetVisibilityChanged(bool visible) OVERRIDE;
+  virtual void OnNativeWidgetCreated() OVERRIDE;
+  virtual void OnNativeWidgetDestroying() OVERRIDE;
+  virtual void OnNativeWidgetDestroyed() OVERRIDE;
+  virtual gfx::Size GetMinimumSize() OVERRIDE;
+  virtual void OnNativeWidgetSizeChanged(const gfx::Size& new_size) OVERRIDE;
+  virtual void OnNativeWidgetBeginUserBoundsChange() OVERRIDE;
+  virtual void OnNativeWidgetEndUserBoundsChange() OVERRIDE;
+  virtual bool HasFocusManager() const OVERRIDE;
+  virtual bool OnNativeWidgetPaintAccelerated(
+      const gfx::Rect& dirty_region) OVERRIDE;
+  virtual void OnNativeWidgetPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual int GetNonClientComponent(const gfx::Point& point) OVERRIDE;
+  virtual bool OnKeyEvent(const KeyEvent& event) OVERRIDE;
+  virtual bool OnMouseEvent(const MouseEvent& event) OVERRIDE;
+  virtual void OnMouseCaptureLost() OVERRIDE;
+  virtual ui::TouchStatus OnTouchEvent(const TouchEvent& event) OVERRIDE;
+  virtual bool ExecuteCommand(int command_id) OVERRIDE;
+  virtual InputMethod* GetInputMethodDirect() OVERRIDE;
+  virtual Widget* AsWidget() OVERRIDE;
+  virtual const Widget* AsWidget() const OVERRIDE;
+
+  // Overridden from FocusTraversable:
+  virtual FocusSearch* GetFocusSearch() OVERRIDE;
+  virtual FocusTraversable* GetFocusTraversableParent() OVERRIDE;
+  virtual View* GetFocusTraversableParentView() OVERRIDE;
+
+ protected:
+  // Creates the RootView to be used within this Widget. Subclasses may override
+  // to create custom RootViews that do specialized event processing.
+  // TODO(beng): Investigate whether or not this is needed.
+  virtual internal::RootView* CreateRootView();
+
+  // Provided to allow the NativeWidget implementations to destroy the RootView
+  // _before_ the focus manager/tooltip manager.
+  // TODO(beng): remove once we fold those objects onto this one.
+  void DestroyRootView();
+
+ private:
+  // TODO(beng): Remove NativeWidgetGtk's dependence on the mouse state flags.
+  friend class NativeWidgetGtk;
+
+  friend class NativeTextfieldViewsTest;
+  friend class NativeComboboxViewsTest;
+  friend class ScopedEvent;
+
+  // Returns whether capture should be released on mouse release.
+  virtual bool ShouldReleaseCaptureOnMouseReleased() const;
+
+  // Sets the value of |disable_inactive_rendering_|. If the value changes,
+  // both the NonClientView and WidgetDelegate are notified.
+  void SetInactiveRenderingDisabled(bool value);
+
+  // Persists the window's restored position and "show" state using the
+  // window delegate.
+  void SaveWindowPlacement();
+
+  // Sizes and positions the window just after it is created.
+  void SetInitialBounds(const gfx::Rect& bounds);
+
+  // Returns the bounds and "show" state from the delegate. Returns true if
+  // the delegate wants to use a specified bounds.
+  bool GetSavedWindowPlacement(gfx::Rect* bounds,
+                               ui::WindowShowState* show_state);
+
+  // Sets a different InputMethod instance to this widget. The instance
+  // must not be initialized, the ownership will be assumed by the widget.
+  // It's only for testing purpose.
+  void ReplaceInputMethod(InputMethod* input_method);
+
+  internal::NativeWidgetPrivate* native_widget_;
+
+  ObserverList<Observer> observers_;
+
+  // Non-owned pointer to the Widget's delegate.  May be NULL if no delegate is
+  // being used.
+  WidgetDelegate* widget_delegate_;
+
+  // The root of the View hierarchy attached to this window.
+  // WARNING: see warning in tooltip_manager_ for ordering dependencies with
+  // this and tooltip_manager_.
+  scoped_ptr<internal::RootView> root_view_;
+
+  // The View that provides the non-client area of the window (title bar,
+  // window controls, sizing borders etc). To use an implementation other than
+  // the default, this class must be sub-classed and this value set to the
+  // desired implementation before calling |InitWindow()|.
+  NonClientView* non_client_view_;
+
+  // The focus manager keeping track of focus for this Widget and any of its
+  // children.  NULL for non top-level widgets.
+  // WARNING: RootView's destructor calls into the FocusManager. As such, this
+  // must be destroyed AFTER root_view_. This is enforced in DestroyRootView().
+  scoped_ptr<FocusManager> focus_manager_;
+
+  // A theme provider to use when no other theme provider is specified.
+  scoped_ptr<DefaultThemeProvider> default_theme_provider_;
+
+  // Valid for the lifetime of RunShellDrag(), indicates the view the drag
+  // started from.
+  View* dragged_view_;
+
+  // The event stack.
+  std::stack<ScopedEvent*> event_stack_;
+
+  // See class documentation for Widget above for a note about ownership.
+  InitParams::Ownership ownership_;
+
+  // See set_is_secondary_widget().
+  bool is_secondary_widget_;
+
+  // The current frame type in use by this window. Defaults to
+  // FRAME_TYPE_DEFAULT.
+  FrameType frame_type_;
+
+  // True when the window should be rendered as active, regardless of whether
+  // or not it actually is.
+  bool disable_inactive_rendering_;
+
+  // Set to true if the widget is in the process of closing.
+  bool widget_closed_;
+
+  // The saved "show" state for this window. See note in SetInitialBounds
+  // that explains why we save this.
+  ui::WindowShowState saved_show_state_;
+
+  // The restored bounds used for the initial show. This is only used if
+  // |saved_show_state_| is maximized.
+  gfx::Rect initial_restored_bounds_;
+
+  // Focus is automatically set to the view provided by the delegate
+  // when the widget is shown. Set this value to false to override
+  // initial focus for the widget.
+  bool focus_on_creation_;
+
+  scoped_ptr<InputMethod> input_method_;
+
+  // See |is_top_level()| accessor.
+  bool is_top_level_;
+
+  // Tracks whether native widget has been initialized.
+  bool native_widget_initialized_;
+
+  // TODO(beng): Remove NativeWidgetGtk's dependence on these:
+  // If true, the mouse is currently down.
+  bool is_mouse_button_pressed_;
+
+  // TODO(beng): Remove NativeWidgetGtk's dependence on these:
+  // The following are used to detect duplicate mouse move events and not
+  // deliver them. Displaying a window may result in the system generating
+  // duplicate move events even though the mouse hasn't moved.
+  bool last_mouse_event_was_move_;
+  gfx::Point last_mouse_event_position_;
+
+  DISALLOW_COPY_AND_ASSIGN(Widget);
+};
+
+}  // namespace views
+
+#endif  // VIEWS_WIDGET_WIDGET_H_