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Another highlighting patch from Richard Boulton: immediately flag

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any actual clashes (duplicate numbers in a row, column or block) in
red. This is a non-privileged deduction: it doesn't compare against
a known solution or consult a solver. It simply indicates reasons
why (no superset of) the current grid would cause the completion
flash to go off.

[originally from svn r5898]
This commit is contained in:
Simon Tatham
2005-06-01 18:33:25 +00:00
parent 50edaa578b
commit f46086ab6d
1 changed files with 38 additions and 3 deletions
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41
solo.c
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@ -123,6 +123,7 @@ enum {
COL_CLUE,
COL_USER,
COL_HIGHLIGHT,
COL_ERROR,
COL_PENCIL,
NCOLOURS
};
@ -1996,6 +1997,10 @@ static float *game_colours(frontend *fe, game_state *state, int *ncolours)
ret[COL_HIGHLIGHT * 3 + 1] = 0.85F * ret[COL_BACKGROUND * 3 + 1];
ret[COL_HIGHLIGHT * 3 + 2] = 0.85F * ret[COL_BACKGROUND * 3 + 2];
ret[COL_ERROR * 3 + 0] = 1.0F;
ret[COL_ERROR * 3 + 1] = 0.0F;
ret[COL_ERROR * 3 + 2] = 0.0F;
ret[COL_PENCIL * 3 + 0] = 0.5F * ret[COL_BACKGROUND * 3 + 0];
ret[COL_PENCIL * 3 + 1] = 0.5F * ret[COL_BACKGROUND * 3 + 1];
ret[COL_PENCIL * 3 + 2] = ret[COL_BACKGROUND * 3 + 2];
@ -2064,10 +2069,10 @@ static void draw_number(frontend *fe, game_drawstate *ds, game_state *state,
clip(fe, cx, cy, cw, ch);
/* background needs erasing */
draw_rect(fe, cx, cy, cw, ch, hl == 1 ? COL_HIGHLIGHT : COL_BACKGROUND);
draw_rect(fe, cx, cy, cw, ch, (hl & 15) == 1 ? COL_HIGHLIGHT : COL_BACKGROUND);
/* pencil-mode highlight */
if (hl == 2) {
if ((hl & 15) == 2) {
int coords[6];
coords[0] = cx;
coords[1] = cy;
@ -2086,7 +2091,7 @@ static void draw_number(frontend *fe, game_drawstate *ds, game_state *state,
str[0] += 'a' - ('9'+1);
draw_text(fe, tx + TILE_SIZE/2, ty + TILE_SIZE/2,
FONT_VARIABLE, TILE_SIZE/2, ALIGN_VCENTRE | ALIGN_HCENTRE,
state->immutable[y*cr+x] ? COL_CLUE : COL_USER, str);
state->immutable[y*cr+x] ? COL_CLUE : (hl & 16) ? COL_ERROR : COL_USER, str);
} else {
/* pencil marks required? */
int i, j;
@ -2120,6 +2125,7 @@ static void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate,
float animtime, float flashtime)
{
int c = state->c, r = state->r, cr = c*r;
int entered_items[cr*cr];
int x, y;
if (!ds->started) {
@ -2146,18 +2152,47 @@ static void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate,
}
}
/*
* This array is used to keep track of rows, columns and boxes
* which contain a number more than once.
*/
for (x = 0; x < cr * cr; x++)
entered_items[x] = 0;
for (x = 0; x < cr; x++)
for (y = 0; y < cr; y++) {
digit d = state->grid[y*cr+x];
if (d) {
int box = (x/r)+(y/c)*c;
entered_items[x*cr+d-1] |= ((entered_items[x*cr+d-1] & 1) << 1) | 1;
entered_items[y*cr+d-1] |= ((entered_items[y*cr+d-1] & 4) << 1) | 4;
entered_items[box*cr+d-1] |= ((entered_items[box*cr+d-1] & 16) << 1) | 16;
}
}
/*
* Draw any numbers which need redrawing.
*/
for (x = 0; x < cr; x++) {
for (y = 0; y < cr; y++) {
int highlight = 0;
digit d = state->grid[y*cr+x];
if (flashtime > 0 &&
(flashtime <= FLASH_TIME/3 ||
flashtime >= FLASH_TIME*2/3))
highlight = 1;
/* Highlight active input areas. */
if (x == ui->hx && y == ui->hy)
highlight = ui->hpencil ? 2 : 1;
/* Mark obvious errors (ie, numbers which occur more than once
* in a single row, column, or box). */
if ((entered_items[x*cr+d-1] & 2) ||
(entered_items[y*cr+d-1] & 8) ||
(entered_items[((x/r)+(y/c)*c)*cr+d-1] & 32))
highlight |= 16;
draw_number(fe, ds, state, x, y, highlight);
}
}