Gtk: Make click target of tabs match their appearance.

chrome/browser/ui/gtk/gtk_input_event_box.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 CHROME_BROWSER_UI_GTK_GTK_INPUT_EVENT_BOX_H_
+#define CHROME_BROWSER_UI_GTK_GTK_INPUT_EVENT_BOX_H_
+#pragma once
+
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+// GtkInputEventBox is like GtkEventBox, but with the following differences:
+//  1. Only supports input (like gtk_event_box_set_visible_window(foo, FALSE).
+//  2. Provides a method to get the GdkWindow (gtk_input_event_box_get_window).
+//  (The GdkWindow created by GtkEventBox cannot be retrieved unless you use it
+//  in visible mode.)
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_INPUT_EVENT_BOX                                 \
+    (gtk_input_event_box_get_type())
+#define GTK_INPUT_EVENT_BOX(obj)                                 \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_INPUT_EVENT_BOX, \
+                                GtkInputEventBox))
+#define GTK_INPUT_EVENT_BOX_CLASS(klass)                         \
+    (G_TYPE_CHECK_CLASS_CAST((klass), GTK_TYPE_INPUT_EVENT_BOX,  \
+                             GtkInputEventBoxClass))
+#define GTK_IS_INPUT_EVENT_BOX(obj)                              \
+    (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_INPUT_EVENT_BOX))
+#define GTK_IS_INPUT_EVENT_BOX_CLASS(klass)                      \
+    (G_TYPE_CHECK_CLASS_TYPE((klass), GTK_TYPE_INPUT_EVENT_BOX))
+#define GTK_INPUT_EVENT_BOX_GET_CLASS(obj)                       \
+    (G_TYPE_INSTANCE_GET_CLASS((obj), GTK_TYPE_INPUT_EVENT_BOX,  \
+                               GtkInputEventBoxClass))
+
+typedef struct _GtkInputEventBox GtkInputEventBox;
+typedef struct _GtkInputEventBoxClass GtkInputEventBoxClass;
+
+struct _GtkInputEventBox {
+  // Parent class.
+  GtkBin bin;
+};
+
+struct _GtkInputEventBoxClass {
+  GtkBinClass parent_class;
+};
+
+GType gtk_input_event_box_get_type();
+GtkWidget* gtk_input_event_box_new();
+
+// Get the GdkWindow |widget| uses for handling input events. Will be NULL if
+// the widget has not been realized yet.
+GdkWindow* gtk_input_event_box_get_window(GtkInputEventBox* widget);
+
+G_END_DECLS
+
+#endif  // CHROME_BROWSER_UI_GTK_GTK_INPUT_EVENT_BOX_H_