GTK 3 cleanup: stop using GtkDialog for config boxes.

It's becoming annoying to keep working within the increasing
restrictions on GtkDialog, in particular the fact that not only do we
have to let it have complete control of the button area, but also it's
not clear whether we can intercept a press of the 'OK' button and
display an error message rather than ending the dialog.

So, as I did in PuTTY, I'm resorting to using an ordinary GtkWindow
with controls I laid out myself.

1 files changed, 23 insertions, 9 deletions

diff --git a/gtk.c b/gtk.c
index 78d8eaa..0333e54 100644
--- a/gtk.c
+++ b/gtk.c
@@ -1570,6 +1570,7 @@ static void droplist_sel(GtkComboBox *combo, gpointer data)
 static int get_config(frontend *fe, int which)
 {
     GtkWidget *w, *table, *cancel;
+    GtkBox *content_box, *button_box;
     char *title;
     config_item *i;
     int y;
@@ -1578,23 +1579,38 @@ static int get_config(frontend *fe, int which)
     fe->cfg_which = which;
     fe->cfgret = FALSE;
 
+#if GTK_CHECK_VERSION(3,0,0)
+    /* GtkDialog isn't quite flexible enough */
+    fe->cfgbox = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+    content_box = GTK_BOX(gtk_vbox_new(FALSE, 8));
+    g_object_set(G_OBJECT(content_box), "margin", 8, (const char *)NULL);
+    gtk_widget_show(GTK_WIDGET(content_box));
+    gtk_container_add(GTK_CONTAINER(fe->cfgbox), GTK_WIDGET(content_box));
+    button_box = GTK_BOX(gtk_hbox_new(FALSE, 8));
+    gtk_widget_show(GTK_WIDGET(button_box));
+    gtk_box_pack_end(content_box, GTK_WIDGET(button_box), FALSE, FALSE, 0);
+    {
+        GtkWidget *sep = gtk_separator_new(GTK_ORIENTATION_HORIZONTAL);
+        gtk_widget_show(sep);
+        gtk_box_pack_end(content_box, sep, FALSE, FALSE, 0);
+    }
+#else
     fe->cfgbox = gtk_dialog_new();
+    content_box = GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(fe->cfgbox)));
+    button_box = GTK_BOX(gtk_dialog_get_action_area(GTK_DIALOG(fe->cfgbox)));
+#endif
     gtk_window_set_title(GTK_WINDOW(fe->cfgbox), title);
     sfree(title);
 
     w = gtk_button_new_with_our_label(LABEL_CANCEL);
-    gtk_box_pack_end
-        (GTK_BOX(gtk_dialog_get_action_area(GTK_DIALOG(fe->cfgbox))),
-         w, FALSE, FALSE, 0);
+    gtk_box_pack_end(button_box, w, FALSE, FALSE, 0);
     gtk_widget_show(w);
     g_signal_connect(G_OBJECT(w), "clicked",
                      G_CALLBACK(config_cancel_button_clicked), fe);
     cancel = w;
 
     w = gtk_button_new_with_our_label(LABEL_OK);
-    gtk_box_pack_end
-        (GTK_BOX(gtk_dialog_get_action_area(GTK_DIALOG(fe->cfgbox))),
-         w, FALSE, FALSE, 0);
+    gtk_box_pack_end(button_box, w, FALSE, FALSE, 0);
     gtk_widget_show(w);
     gtk_widget_set_can_default(w, TRUE);
     gtk_window_set_default(GTK_WINDOW(fe->cfgbox), w);
@@ -1607,9 +1623,7 @@ static int get_config(frontend *fe, int which)
     table = gtk_table_new(1, 2, FALSE);
 #endif
     y = 0;
-    gtk_box_pack_start
-        (GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(fe->cfgbox))),
-         table, FALSE, FALSE, 0);
+    gtk_box_pack_start(content_box, table, FALSE, FALSE, 0);
     gtk_widget_show(table);
 
     for (i = fe->cfg; i->type != C_END; i++) {