[gthumb] preferences: show changed shortcuts in a different style

[Paolo Bacchilega <paobac src gnome org>]

commit b00fcd9cbbcdcf4354c4e613cacd72be202f9a48
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Nov 11 18:16:32 2019 +0100

    preferences: show changed shortcuts in a different style

 gthumb/dlg-preferences-shortcuts.c | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)
---
diff --git a/gthumb/dlg-preferences-shortcuts.c b/gthumb/dlg-preferences-shortcuts.c
index 15acdac3..facaacb3 100644
--- a/gthumb/dlg-preferences-shortcuts.c
+++ b/gthumb/dlg-preferences-shortcuts.c
@@ -87,13 +87,38 @@ row_data_free (RowData *row_data)
 }
 
 
+static void
+row_data_update_accel_label (RowData *row_data)
+{
+       gboolean modified;
+
+       modified = g_strcmp0 (row_data->shortcut->default_accelerator, row_data->shortcut->accelerator) != 0;
+       if (modified) {
+               char *esc_text;
+               char *markup_text;
+
+               esc_text = g_markup_escape_text (row_data->shortcut->label, -1);
+               markup_text = g_strdup_printf ("<b>%s</b>", esc_text);
+               gtk_label_set_markup (GTK_LABEL (row_data->accel_label), markup_text);
+               gtk_style_context_add_class (gtk_widget_get_style_context (row_data->accel_label), 
GTK_STYLE_CLASS_DIM_LABEL);
+
+               g_free (markup_text);
+               g_free (esc_text);
+       }
+       else {
+               gtk_label_set_text (GTK_LABEL (row_data->accel_label), row_data->shortcut->label);
+               gtk_style_context_remove_class (gtk_widget_get_style_context (row_data->accel_label), 
GTK_STYLE_CLASS_DIM_LABEL);
+       }
+}
+
+
 static void
 row_data_update_shortcut (RowData         *row_data,
                          guint            keycode,
                          GdkModifierType  modifiers)
 {
        gth_shortcut_set_key (row_data->shortcut, keycode, modifiers);
-       gtk_label_set_text (GTK_LABEL (row_data->accel_label), row_data->shortcut->label);
+       row_data_update_accel_label (row_data);
 
        gth_main_shortcuts_changed (gth_window_get_shortcuts (GTH_WINDOW (row_data->browser_data->browser)));
 }
@@ -172,11 +197,12 @@ _new_shortcut_row (GthShortcut *shortcut,
        gtk_size_group_add_widget (GTK_SIZE_GROUP (gtk_builder_get_object (data->builder, 
"column1_size_group")), label);
        gtk_box_pack_start (GTK_BOX (box), label, TRUE, TRUE, 0);
 
-       row_data->accel_label = label = gtk_label_new ((shortcut->label != NULL) ? shortcut->label : "");
+       row_data->accel_label = label = gtk_label_new ("");
        gtk_label_set_xalign (GTK_LABEL (label), 0.0);
        gtk_widget_set_margin_end (label, 12);
        gtk_size_group_add_widget (GTK_SIZE_GROUP (gtk_builder_get_object (data->builder, 
"column2_size_group")), label);
        gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
+       row_data_update_accel_label (row_data);
 
        gtk_widget_show_all (row);