+ if (!gpm.peak_display.get_parent()) {
+ middle_button_table.attach (gpm.peak_display,1,2,1,2);
+ }
+ if (gpm.gain_display.get_parent()) {
+ middle_button_table.remove (gpm.gain_display);
+ }
+ if (!gpm.gain_display.get_parent()) {
+ middle_button_table.attach (gpm.gain_display,0,1,1,2);
+ }
+