diff options
Diffstat (limited to 'desktop/scrollbar.c')
-rw-r--r-- | desktop/scrollbar.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/desktop/scrollbar.c b/desktop/scrollbar.c index 1ec89437a..45ffa2f79 100644 --- a/desktop/scrollbar.c +++ b/desktop/scrollbar.c @@ -461,6 +461,30 @@ bool scrollbar_scroll(struct scrollbar *s, int change) /* zero scroll step, or unscrollable */ return false; + /* Convert named change values to appropriate pixel offset value */ + switch (change) { + case SCROLL_TOP: + change = -s->full_size; + break; + + case SCROLL_PAGE_UP: + change = -s->visible_size; + break; + + case SCROLL_PAGE_DOWN: + change = s->visible_size; + break; + + case SCROLL_BOTTOM: + change = s->full_size; + break; + + default: + /* Change value is already a pixel offset */ + break; + } + + /* Get new offset */ if (s->offset + change > s->full_size - s->visible_size) s->offset = s->full_size - s->visible_size; else if (s->offset + change < 0) @@ -472,6 +496,7 @@ bool scrollbar_scroll(struct scrollbar *s, int change) /* Nothing happened */ return false; + /* Update scrollbar */ well_length = s->length - 2 * SCROLLBAR_WIDTH; s->bar_pos = (s->full_size < 1) ? 0 : ((well_length * s->offset) / s->full_size); |