These button codes are generated by the back/forward button pair on
the sides of some mice, and web browsers treat these as the back and
forward actions in the page history.
Pressing H now suggests the lexicographically first row consistent
with all previous feedback.
The previous function of the H key to toggle a hold marker on the
current peg is now performed by Space / CURSOR_SELECT2, which is more
in line with other puzzles anyway.
Recall that the hint feature is really an incremental solver. Apply
it repeatedly until the board is solved. Grade puzzles as solvable
or unsolvable by checking their parity.
This is really an incremental solver. It alternates between solving
rows and solving columns. Each row and column is solved one piece at
a time. Except for some temporary trickery with the last two pieces
in a row or column, once a piece is solved it is never moved again.
(On non-square grids it first solves some rows or some columns until
the unsolved part is a square, then starts alternating.)
Net provides the best demonstration of why. Complete a game of net,
then press N while the victory flash is playing: then the victory
flash keeps playing on the new game board. (Tip: save a game which
but for a redo is completed, then you can reproduce this repeatedly
without having to complete a new game each time.)
The flash timer reset code is placed together with the animation
timer reset code, because the two are conceptually related. Note
that midend_restart_game resets animations via midend_finish_move.
This is already done in midend_restart_game via midend_finish_move.
If it's good enough for restarting a game, it ought to also be good
enough for starting new games.
Restarting a game that is already in the restarted state is meant to
be a no-op. It stopped animations. Don't do this.
Also, given that midmidend_restart_game called midend_stop_anim
twice, the invocation we remove was redundant.
Animations were stopped if a new game was initiated with a keyboard
shortcut (n, N, Ctrl-N), but not via menu items such as presets or
custom configurations, nor (perhaps not a problem) on starting the
program. Fix this, so that animations are stopped on a new game no
matter how the new game is started.
It's becoming annoying to keep working within the increasing
restrictions on GtkDialog, in particular the fact that not only do we
have to let it have complete control of the button area, but also it's
not clear whether we can intercept a press of the 'OK' button and
display an error message rather than ending the dialog.
So, as I did in PuTTY, I'm resorting to using an ordinary GtkWindow
with controls I laid out myself.
This is a lot easier than faffing about setting up a dialog box
ourself, and also avoids direct access to GtkDialog's action area
(deprecated in GTK 3.16).
Highlight clues of value n in Towers if its row/column contains an
increasing sequence of length n, the last number of which is not equal
to the number of rows/columns (i.e. such that the sequence will have
to be extended, in violation of the clue).
Commit 8b491946e had a bug: configure_area stopped doing most of its
work if the new size already matched fe->w and fe->h, but in fact the
GTK2 resize_fe() _already_ set up fe->w and fe->h for the new size. I
managed not to notice, because I checked it all worked on GTK 3 but
only tested resizing to a _smaller_ puzzle on GTK 2. Ahem.
Now we don't change fe->w and fe->h at all until configure_area is
called. Also, we initialise them to dummy values at setup time, so
that configure_area won't compare the new size with uninitialised
data.
Draw pencil-mode cursor before corners of thick lines in order to make
the thick lines appear on top of the north-west corner of the pencil
cursor, just like they do with the non-pencil cursor.
Keyboard dragging while holding Control now moves the cursor to the
target square. Shift-Control-arrowkey performs the previous behavior
of Control-arrowkey.
