diff options
| -rw-r--r-- | vehicle_gui.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/vehicle_gui.c b/vehicle_gui.c index bff8ec1b1..7c8914758 100644 --- a/vehicle_gui.c +++ b/vehicle_gui.c @@ -821,13 +821,22 @@ static void ReplaceVehicleWndProc(Window *w, WindowEvent *e) } } - if ( selected_id[0] == selected_id[1] || p->engine_replacement[selected_id[0]] == selected_id[1] - || selected_id[0] == -1 || selected_id[1] == -1 ) + // Disable the "Start Replacing" button if: + // Either list is empty + // or Both lists have the same vehicle selected + // or The right list (new replacement) has the existing replacement vehicle selected + if (selected_id[0] == -1 || selected_id[1] == -1 || + selected_id[0] == selected_id[1] || + p->engine_replacement[selected_id[0]] == selected_id[1]) SETBIT(w->disabled_state, 4); else CLRBIT(w->disabled_state, 4); - if (p->engine_replacement[selected_id[0]] == INVALID_ENGINE || selected_id[0] == -1) + // Disable the "Stop Replacing" button if: + // The left list (existing vehicle) is empty + // or The selected vehicle has no replacement set up + if (selected_id[0] == -1 || + p->engine_replacement[selected_id[0]] == INVALID_ENGINE) SETBIT(w->disabled_state, 6); else CLRBIT(w->disabled_state, 6); |