[gimp] app: support GeglParamSpecSeed in generated operation UI

[Michael Natterer <mitch src gnome org>]

commit d8a9804702a6516a4e8dfd2c3d9838a8d9919a43
Author: Michael Natterer <mitch gimp org>
Date:   Fri Nov 30 02:58:48 2012 +0100

    app: support GeglParamSpecSeed in generated operation UI
    
    and add a "New Seed" button next to the random seed entry.

 app/core/gimpparamspecs-duplicate.c |    8 ++++++++
 app/widgets/gimppropwidgets.c       |   34 ++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpparamspecs-duplicate.c b/app/core/gimpparamspecs-duplicate.c
index 2bd5f28..c3ed61a 100644
--- a/app/core/gimpparamspecs-duplicate.c
+++ b/app/core/gimpparamspecs-duplicate.c
@@ -162,6 +162,14 @@ gimp_param_spec_duplicate (GParamSpec *pspec)
                                   pspec->flags |
                                   GIMP_CONFIG_PARAM_SERIALIZE);
     }
+  else if (GEGL_IS_PARAM_SPEC_SEED (pspec))
+    {
+      return gegl_param_spec_seed (pspec->name,
+                                   g_param_spec_get_nick (pspec),
+                                   g_param_spec_get_blurb (pspec),
+                                   pspec->flags |
+                                   GIMP_CONFIG_PARAM_SERIALIZE);
+    }
   else if (G_IS_PARAM_SPEC_INT (pspec))
     {
       GParamSpecInt *spec = G_PARAM_SPEC_INT (pspec);
diff --git a/app/widgets/gimppropwidgets.c b/app/widgets/gimppropwidgets.c
index 26fd7ed..4cc6bcf 100644
--- a/app/widgets/gimppropwidgets.c
+++ b/app/widgets/gimppropwidgets.c
@@ -1443,6 +1443,16 @@ gimp_prop_table_chain_toggled (GimpChainButton *chain,
     }
 }
 
+static void
+gimp_prop_table_new_seed_clicked (GtkButton     *button,
+                                  GtkAdjustment *adj)
+{
+  guint32 value = g_random_int_range (gtk_adjustment_get_lower (adj),
+                                      gtk_adjustment_get_upper (adj));
+
+  gtk_adjustment_set_value (adj, value);
+}
+
 GtkWidget *
 gimp_prop_table_new (GObject              *config,
                      GType                 owner_type,
@@ -1526,6 +1536,30 @@ gimp_prop_table_new (GObject              *config,
           widget = gimp_prop_enum_combo_box_new (config, pspec->name, 0, 0);
           label = g_param_spec_get_nick (pspec);
         }
+      else if (GEGL_IS_PARAM_SPEC_SEED (pspec))
+        {
+          GtkAdjustment *adj;
+          GtkWidget     *scale;
+          GtkWidget     *button;
+
+          widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
+
+          scale = gimp_prop_spin_scale_new (config, pspec->name,
+                                            g_param_spec_get_nick (pspec),
+                                            1.0, 1.0, 0);
+          gtk_box_pack_start (GTK_BOX (widget), scale, TRUE, TRUE, 0);
+          gtk_widget_show (scale);
+
+          button = gtk_button_new_with_label (_("New Seed"));
+          gtk_box_pack_start (GTK_BOX (widget), button, FALSE, FALSE, 0);
+          gtk_widget_show (button);
+
+          adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (scale));
+
+          g_signal_connect (button, "clicked",
+                            G_CALLBACK (gimp_prop_table_new_seed_clicked),
+                            adj);
+        }
       else if (G_IS_PARAM_SPEC_INT (pspec)   ||
                G_IS_PARAM_SPEC_UINT (pspec)  ||
                G_IS_PARAM_SPEC_FLOAT (pspec) ||