[recipes] Make it possible to toggle the edit/delete buttons

[Matthias Clasen <matthiasc src gnome org>]

commit 0123aa523d390ca225578fc090fe2db1419734e1
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Dec 22 20:35:32 2016 -0500

    Make it possible to toggle the edit/delete buttons
    
    This feels more natural. For good measure, we also remove
    the buttons when a segment is added or removed, just so
    we avoid getting into problems if the active row gets
    indirectly removed.

 src/gr-edit-page.c |   28 +++++++++++++++++++---------
 1 files changed, 19 insertions(+), 9 deletions(-)
---
diff --git a/src/gr-edit-page.c b/src/gr-edit-page.c
index ca073d6..9c7fcbf 100644
--- a/src/gr-edit-page.c
+++ b/src/gr-edit-page.c
@@ -266,21 +266,22 @@ edit_ingredient (GtkButton *button, GrEditPage *page)
 }
 
 static void
-ingredient_row_activated (GtkListBox    *list,
-                          GtkListBoxRow *row,
-                          GrEditPage    *page)
+set_active_row (GrEditPage *page,
+                GtkWidget *row)
 {
         GtkWidget *stack;
 
-        if ((GtkWidget *)row == page->active_row)
-                return;
-
         if (page->active_row) {
                 stack = g_object_get_data (G_OBJECT (page->active_row), "buttons-stack");
                 gtk_stack_set_visible_child_name (GTK_STACK (stack), "empty");
         }
 
-        page->active_row = (GtkWidget *)row;
+        if (page->active_row == row) {
+                page->active_row = NULL;
+                return;
+        }
+
+        page->active_row = row;
 
         if (page->active_row) {
                 stack = g_object_get_data (G_OBJECT (page->active_row), "buttons-stack");
@@ -289,6 +290,14 @@ ingredient_row_activated (GtkListBox    *list,
 }
 
 static void
+ingredient_row_activated (GtkListBox    *list,
+                          GtkListBoxRow *row,
+                          GrEditPage    *page)
+{
+        set_active_row (page, GTK_WIDGET (row));
+}
+
+static void
 update_ingredient_row (GtkWidget  *row,
                        const char *amount,
                        const char *unit,
@@ -383,8 +392,6 @@ add_ingredient_row (GrEditPage   *page,
 
         gtk_list_box_row_set_activatable (GTK_LIST_BOX_ROW (row), TRUE);
 
-        g_signal_connect (list, "row-activated", G_CALLBACK (ingredient_row_activated), page);
-
         return row;
 }
 
@@ -681,6 +688,7 @@ add_ingredients_segment (GrEditPage *page,
         gtk_stack_add_named (GTK_STACK (stack), box, "entry");
 
         list = gtk_list_box_new ();
+        g_signal_connect (list, "row-activated", G_CALLBACK (ingredient_row_activated), page);
         g_object_set_data (G_OBJECT (segment), "list", list);
 
         gtk_widget_show (list);
@@ -734,6 +742,7 @@ add_list (GtkButton *button, GrEditPage *page)
         add_ingredients_segment (page, "");
 
         update_segments (page);
+        set_active_row (page, NULL);
 }
 
 static void
@@ -747,6 +756,7 @@ remove_list (GtkButton *button, GrEditPage *page)
         gtk_widget_destroy (segment);
 
         update_segments (page);
+        set_active_row (page, NULL);
 }
 
 static void