shithub: puzzles

Download patch

ref: 0d005b526ed554a165a83557512e745c8de335d6
parent: c5076be383d7630d70666a543306c8f6ee65edb9
author: Ben Harris <bjh21@bjh21.me.uk>
date: Thu Jun 22 19:34:48 EDT 2023

Pearl: slightly better handling of clicks outside the grid

In Pearl, a mouse-down outside the grid sets ui->ndragcoords to -1.
The intended effect of this is to make sure that future drags are
ignored, so you can't try to draw a line starting off the grid.
However, this also has the effect of clearing any in-progress drag.
This can happen if there's a keyboard "drag" in progress at the time.

This is arguably wrong, but much more wrong was that interpret_move
returned MOVE_UNUSED (and previously NULL) in this case.  That meant
that the display didn't get updated to show the abandonment of the
drag, or the removal of the keyboard cursor that also happened.  This
commit changes MOVE_UNUSED to MOVE_UI_UPDATE so that at least the
effect is correctly visible.

--- a/pearl.c
+++ b/pearl.c
@@ -2175,7 +2175,7 @@
 
         if (!INGRID(state, gx, gy)) {
             ui->ndragcoords = -1;
-            return MOVE_UNUSED;
+            return MOVE_UI_UPDATE;
         }
 
         ui->clickx = x; ui->clicky = y;