--- gigedit/trunk/src/gigedit/compat.h	2021/02/14 14:21:55	3859
+++ gigedit/trunk/src/gigedit/compat.h	2021/02/21 14:41:48	3860
@@ -447,6 +447,10 @@
  * the assumption that EVERY word of the text had a line break, which would
  * cause the label to claim much more vertical space than actually required for
  * the text.
+ *
+ * NOTE: This class only works with Gtk 3 and higher. For Gtk 2 and younger it
+ * does nothing different than a normal Gtk::Label right now. See TODO comment
+ * on get_preferred_height_for_width_vfunc() below for details.
  */
 class MultiLineLabel : public Gtk::Label {
 public:
@@ -461,6 +465,12 @@
         m_markup = s;
     }
 
+    //TODO: get_preferred_height_for_width_vfunc() did not exist in Gtk 2, nor
+    // did get_margin_top() and get_margin_bottom() and consequently I'm
+    // unsure whether the issue MultiLineLabel addresses could actually be
+    // fixed for Gtk 2 as well. For now this code is simply commented out
+    // which means MultiLineLabel behaves as Gtk::Label on Gtk 2 & older.
+    #if GTKMM_MAJOR_VERSION >= 3
     void get_preferred_height_for_width_vfunc(int width, int& minimum_height, int& natural_height) const {
         Gtk::Label::get_preferred_height_for_width_vfunc(width, minimum_height, natural_height);
         //printf("super suggests minimum_height=%d natural_height=%d\n", minimum_height, natural_height);
@@ -478,6 +488,7 @@
         if (natural_height < h)
             natural_height = h;
     }
+    #endif // GTKMM_MAJOR_VERSION >= 3
 
 private:
     Glib::ustring m_markup;