[gtk+/wip/carlosg/event-delivery: 248/261] gtkwidget: Add private set_pass_through() call

[Carlos Garnacho <carlosg src gnome org>]

commit 44d1c1d0bc165a18bb1911cac05caa3d445524f2
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Apr 6 13:55:35 2017 +0200

    gtkwidget: Add private set_pass_through() call
    
    We could eventually support pointer-event in CSS here, in the mean
    time add this call to replace the GdkWindow API.

 gtk/gtkmain.c          |    3 ++-
 gtk/gtkwidget.c        |   13 +++++++++++++
 gtk/gtkwidgetprivate.h |    4 ++++
 3 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index bc26057..55e1ceb 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -2586,7 +2586,8 @@ _gtk_toplevel_pick (GtkWindow *toplevel,
         {
           gdouble tx = x, ty = y;
 
-          if (!gtk_widget_is_sensitive (child) ||
+          if (gtk_widget_get_pass_through (child) ||
+              !gtk_widget_is_sensitive (child) ||
               !gtk_widget_is_drawable (child))
             continue;
 
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index dd4c1a2..0a9a6a9 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -15612,3 +15612,16 @@ gtk_widget_get_cursor (GtkWidget *widget)
 {
   return widget->priv->cursor;
 }
+
+void
+gtk_widget_set_pass_through (GtkWidget *widget,
+                             gboolean   pass_through)
+{
+  widget->priv->pass_through = !!pass_through;
+}
+
+gboolean
+gtk_widget_get_pass_through (GtkWidget *widget)
+{
+  return widget->priv->pass_through;
+}
diff --git a/gtk/gtkwidgetprivate.h b/gtk/gtkwidgetprivate.h
index 422969a..8763278 100644
--- a/gtk/gtkwidgetprivate.h
+++ b/gtk/gtkwidgetprivate.h
@@ -70,6 +70,7 @@ struct _GtkWidgetPrivate
   guint child_visible         : 1;
   guint multidevice           : 1;
   guint has_shape_mask        : 1;
+  guint pass_through          : 1;
 
   /* Queue-resize related flags */
   guint resize_needed         : 1; /* queue_resize() has been called but no get_preferred_size() yet */
@@ -323,6 +324,9 @@ void              gtk_widget_set_cursor                    (GtkWidget *widget,
                                                             GdkCursor *cursor);
 GdkCursor *       gtk_widget_get_cursor                    (GtkWidget *widget);
 
+void              gtk_widget_set_pass_through              (GtkWidget *widget,
+                                                            gboolean   pass_through);
+gboolean          gtk_widget_get_pass_through              (GtkWidget *widget);
 
 /* inline getters */