Creates a new TabContentsViewGtk for views based FE.

views/widget/widget_gtk.h

 // Copyright (c) 2009 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_GTK_H_
 #define VIEWS_WIDGET_WIDGET_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "base/message_loop.h"
@@ skipping 38 matching lines @@
   // transparent is done by ConfigureWidgetForTransparentBackground.
   bool MakeTransparent();
   bool is_transparent() const { return transparent_; }
 
   // Sets whether or not we are deleted when the widget is destroyed. The
   // default is true.
   void set_delete_on_destroy(bool delete_on_destroy) {
     delete_on_destroy_ = delete_on_destroy;
   }
 
+  // Adds and removes the specified widget as a child of this widget's contents.
+  // These methods make sure to add the widget to the window's contents
+  // container if this widget is a window.
   void AddChild(GtkWidget* child);
   void RemoveChild(GtkWidget* child);
 
+  // A safe way to reparent a child widget to this widget. Calls
+  // gtk_widget_reparent which handles refcounting to avoid destroying the
+  // widget when removing it from its old parent.
+  void ReparentChild(GtkWidget* child);
+
   // Positions a child GtkWidget at the specified location and bounds.
   void PositionChild(GtkWidget* child, int x, int y, int w, int h);
 
-  // Parent GtkWidget all children are added to. This is not necessarily
-  // the same as returned by GetNativeView.
-  GtkWidget* child_widget_parent() const { return child_widget_parent_; }
+  // Parent GtkWidget all children are added to. When this WidgetGtk corresponds
+  // to a top level window, this is the GtkFixed within the GtkWindow, not the
+  // GtkWindow itself. For child widgets, this is the same GtkFixed as
+  // |widget_|.
+  GtkWidget* window_contents() const { return window_contents_; }
 
   virtual void SetContentsView(View* view);
 
   // Overridden from Widget:
   virtual void GetBounds(gfx::Rect* out, bool including_frame) const;
   virtual void SetBounds(const gfx::Rect& bounds);
   virtual void SetShape(const gfx::Path& shape);
   virtual void Close();
   virtual void CloseNow();
   virtual void Show();
@@ skipping 89 matching lines @@
   static gboolean CallVisibilityNotify(GtkWidget* widget,
                                        GdkEventVisibility* event);
   static gboolean CallGrabBrokeEvent(GtkWidget* widget, GdkEvent* event);
   static void CallGrabNotify(GtkWidget* widget, gboolean was_grabbed);
   static void CallDestroy(GtkObject* object);
 
   // Returns the first ancestor of |widget| that is a window.
   static Window* GetWindowImpl(GtkWidget* widget);
 
   // Creates the GtkWidget.
-  void CreateGtkWidget();
+  void CreateGtkWidget(GtkWidget* parent);
+
+  // Attaches the widget contents to the window's widget.
+  void AttachGtkWidgetToWindow();
 
   // Invoked from create widget to enable the various bits needed for a
   // transparent background. This is only invoked if MakeTransparent has been
   // invoked.
   void ConfigureWidgetForTransparentBackground();
 
   void HandleGrabBroke();
 
   const Type type_;
 
   // Our native views. If we're a window/popup, then widget_ is the window and
-  // child_widget_parent_ is a GtkFixed. If we're not a window/popup, then
-  // widget_ and child_widget_parent_ are a GtkFixed.
+  // window_contents_ is a GtkFixed. If we're not a window/popup, then widget_
+  // and window_contents_ point to the same GtkFixed.
   GtkWidget* widget_;
-  GtkWidget* child_widget_parent_;
+  GtkWidget* window_contents_;

[sky, 2009/06/16 16:01:45]

Why did you rename this? I went with the name child_widget_parent_ as this is
the parent and any child widgets are to be added to.

+
+  // Child GtkWidgets created with no parent need to be parented to a valid top
+  // level window otherwise Gtk throws a fit. |null_parent_| is an invisible
+  // popup that such GtkWidgets are parented to.
+  static GtkWidget* null_parent_;
 
   // The root of the View hierarchy attached to this window.
   scoped_ptr<RootView> root_view_;
 
   scoped_ptr<TooltipManagerGtk> tooltip_manager_;
 
   // If true, the mouse is currently down.
   bool is_mouse_down_;
 
   // Have we done a mouse grab?
@@ skipping 20 matching lines @@
   bool transparent_;
 
   scoped_ptr<DefaultThemeProvider> default_theme_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_WIDGET_GTK_H_