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When scrollbar extents are updated, scale current offset appropriately. 

svn path=/trunk/netsurf/; revision=12667
This commit is contained in:
Michael Drake 2011-08-25 09:21:41 +00:00
parent 65398660e5
commit bbc06d6449
1 changed files with 4 additions and 2 deletions
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6
desktop/scrollbar.c
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@ -458,8 +458,7 @@ void scrollbar_set_extents(struct scrollbar *s, int length,
int visible_size, int full_size)
{
int well_length;
/* TODO: update offset appropriately */
int cur_excess = s->full_size - s->visible_size;
if (length != -1)
s->length = length;
@ -468,6 +467,9 @@ void scrollbar_set_extents(struct scrollbar *s, int length,
if (full_size != -1)
s->full_size = full_size;
/* Update scroll offset (scaled in proportion with change in excess) */
s->offset = (s->full_size - s->visible_size) * s->offset / cur_excess;
well_length = s->length - 2 * SCROLLBAR_WIDTH;
s->bar_len = (well_length * s->visible_size) / s->full_size;