[gimp] app: add gimp_prop_range_set_ui_limits()

[Ell <ell src gnome org>]

commit ce8235e97703bca8baec84b6b41de5f47cfc23c1
Author: Ell <ell_se yahoo com>
Date:   Tue Jun 2 18:30:07 2020 +0300

    app: add gimp_prop_range_set_ui_limits()
    
    ... which sets the limits of the range-widget's handle-bar
    explicitly, instead of using the lower/upper properties' limits.

 app/widgets/gimppropwidgets.c | 16 ++++++++++++++++
 app/widgets/gimppropwidgets.h |  3 +++
 2 files changed, 19 insertions(+)
---
diff --git a/app/widgets/gimppropwidgets.c b/app/widgets/gimppropwidgets.c
index 930b4a5ce1..c9560c0435 100644
--- a/app/widgets/gimppropwidgets.c
+++ b/app/widgets/gimppropwidgets.c
@@ -1034,6 +1034,8 @@ gimp_prop_range_new (GObject     *config,
 
   gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar), color_bar);
 
+  g_object_set_data (G_OBJECT (vbox), "gimp-range-handle-bar", handle_bar);
+
   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
   gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
   gtk_widget_show (hbox);
@@ -1064,6 +1066,20 @@ gimp_prop_range_new (GObject     *config,
   return vbox;
 }
 
+void
+gimp_prop_range_set_ui_limits (GtkWidget *widget,
+                               gdouble    lower,
+                               gdouble    upper)
+{
+  GimpHandleBar *handle_bar;
+
+  g_return_if_fail (GTK_IS_WIDGET (widget));
+
+  handle_bar = g_object_get_data (G_OBJECT (widget), "gimp-range-handle-bar");
+
+  gimp_handle_bar_set_limits (handle_bar, lower, upper);
+}
+
 
 /**********/
 /*  view  */
diff --git a/app/widgets/gimppropwidgets.h b/app/widgets/gimppropwidgets.h
index 2aeb3196e9..7b89aa0830 100644
--- a/app/widgets/gimppropwidgets.h
+++ b/app/widgets/gimppropwidgets.h
@@ -88,6 +88,9 @@ GtkWidget * gimp_prop_range_new             (GObject       *config,
                                              gdouble        page_increment,
                                              gint           digits,
                                              gboolean       sorted);
+void        gimp_prop_range_set_ui_limits   (GtkWidget     *widget,
+                                             gdouble        lower,
+                                             gdouble        upper);
 
 
 /*  GParamObject (GimpViewable)  */