X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/60aa1c7413ef8ba2c4889628170f00bf180039f0..cf212d59e2363e5c44ed41b39fbbb3ec29a5e261:/devel.but

diff --git a/devel.but b/devel.but
index 1df57cf..ea23d52 100644
--- a/devel.but
+++ b/devel.but
@@ -2671,6 +2671,11 @@ Calling this function is very likely to result in calls back to the
 front end's drawing API and/or \cw{activate_timer()}
 (\k{frontend-activate-timer}).
 
+The return value from \cw{midend_process_key()} is non-zero, unless
+the effect of the keypress was to request termination of the
+program. A front end should shut down the puzzle in response to a
+zero return.
+
 \H{midend-colours} \cw{midend_colours()}
 
 \c float *midend_colours(midend *me, int *ncolours);
@@ -2728,6 +2733,16 @@ are owned by the mid-end structure: the front end should not ever
 free them directly, because they will be freed automatically during
 \cw{midend_free()}.
 
+\H{midend-which-preset} \cw{midend_which_preset()}
+
+\c int midend_which_preset(midend *me);
+
+Returns the numeric index of the preset game parameter structure
+which matches the current game parameters, or a negative number if
+no preset matches. Front ends could use this to maintain a tick
+beside one of the items in the menu (or tick the \q{Custom} option
+if the return value is less than zero).
+
 \H{midend-wants-statusbar} \cw{midend_wants_statusbar()}
 
 \c int midend_wants_statusbar(midend *me);