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Fix possible rounding errors.

This commit is contained in:
Fernando Tarlá Cardoso Lemos 2010-11-29 20:11:18 -02:00 committed by Michael Stapelberg
parent 3412e12602
commit d046fa446d
1 changed files with 20 additions and 8 deletions
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28
src/render.c
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@ -108,28 +108,40 @@ void render_con(Con *con, bool render_fullscreen) {
i3Font *font = load_font(conn, config.font);
int deco_height = font->height + 5;
/* precalculate the sizes to be able to correct rounding errors */
int sizes[children];
if (con->layout == L_DEFAULT && children > 0) {
Con *child;
int i = 0, assigned = 0;
int total = con->orientation == HORIZ ? rect.width : rect.height;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
double percentage = child->percent > 0.0 ? child->percent : 1.0 / children;
assigned += sizes[i++] = percentage * total;
}
while (assigned < total) {
for (i = 0; i < children && assigned < total; ++i) {
++sizes[i];
++assigned;
}
}
}
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
/* default layout */
if (con->layout == L_DEFAULT) {
double percentage = 1.0 / children;
if (child->percent > 0.0)
percentage = child->percent;
printf("child %p / %s requests percentage %f\n",
child, child->name, percentage);
if (con->orientation == HORIZ) {
child->rect.x = x;
child->rect.y = y;
child->rect.width = percentage * rect.width;
child->rect.width = sizes[i];
child->rect.height = rect.height;
x += child->rect.width;
} else {
child->rect.x = x;
child->rect.y = y;
child->rect.width = rect.width;
child->rect.height = percentage * rect.height;
child->rect.height = sizes[i];
y += child->rect.height;
}