X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/0fe46bd5c639d1fe8f8689057100a216c5c53c23..854a4f51614eb4a6a23e15204d30d1e57ef83c6f:/devel.but

diff --git a/devel.but b/devel.but
index 3695bcd..096aa12 100644
--- a/devel.but
+++ b/devel.but
@@ -1456,6 +1456,26 @@ mid-end doesn't even bother calling \cw{anim_length()}
 each game. On the rare occasion that animated solve moves are
 actually required, you can set this flag.
 
+\dt \cw{REQUIRE_RBUTTON}
+
+\dd This flag indicates that the puzzle cannot be usefully played
+without the use of mouse buttons other than the left one. On some
+PDA platforms, this flag is used by the front end to enable
+right-button emulation through an appropriate gesture. Note that a
+puzzle is not required to set this just because it \e{uses} the
+right button, but only if its use of the right button is critical to
+playing the game. (Slant, for example, uses the right button to
+cycle through the three square states in the opposite order from the
+left button, and hence can manage fine without it.)
+
+\dt \cw{REQUIRE_NUMPAD}
+
+\dd This flag indicates that the puzzle cannot be usefully played
+without the use of number-key input. On some PDA platforms it causes
+an emulated number pad to appear on the screen. Similarly to
+\cw{REQUIRE_RBUTTON}, a puzzle need not specify this simply if its
+use of the number keys is not critical.
+
 \H{backend-initiative} Things a back end may do on its own initiative
 
 This section describes a couple of things that a back end may choose
@@ -2122,7 +2142,7 @@ function; see \k{drawing-draw-circle}.
 \c void (*draw_update)(void *handle, int x, int y, int w, int h);
 
 This function behaves exactly like the back end \cw{draw_update()}
-function; see \k{drawing-draw-text}.
+function; see \k{drawing-draw-update}.
 
 An implementation of this API which only supports printing is
 permitted to define this function pointer to be \cw{NULL} rather