[gtk/wip/baedert/transforms6: 130/155] widget: Use translate_coordinates in pick()

[Timm Bäder <baedert src gnome org>]

commit efda62dd6e97fb54da5b3434a350e72c53c14416
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 28 12:33:04 2018 +0200

    widget: Use translate_coordinates in pick()
    
    In case converting the coordinate into the child coordinate space
    consists of more than just a translation.

 gtk/gtkwidget.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 694989e015..609a1484f1 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -812,11 +812,12 @@ gtk_widget_real_pick (GtkWidget *widget,
        child = _gtk_widget_get_prev_sibling (child))
     {
       GtkWidget *picked;
-      int dx, dy;
+      double dx, dy;
 
-      gtk_widget_get_origin_relative_to_parent (child, &dx, &dy);
+      gtk_widget_translate_coordinatesf (widget, child, x, y, &dx, &dy);
+
+      picked = gtk_widget_pick (child, dx, dy);
 
-      picked = gtk_widget_pick (child, x - dx, y - dy);
       if (picked)
         return picked;
     }