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Merge pull request #1759 from medsouz/scrolloverflow 

Fix scrollbar integer overflow when scrolling up or left.
This commit is contained in:
Ted John 2015-08-10 23:50:37 +01:00
parent 75f65e9ee4 72f3d1ace3
commit 4ee464fb1b
1 changed files with 4 additions and 2 deletions
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6
src/input.c
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@ -693,9 +693,10 @@ static void input_scroll_part_update_hleft(rct_window *w, int widgetIndex, int s
{
if (window_find_by_number(w->classification, w->number)) {
w->scrolls[scroll_id].flags |= HSCROLLBAR_LEFT_PRESSED;
w->scrolls[scroll_id].h_left -= 3;
if (w->scrolls[scroll_id].h_left < 0)
w->scrolls[scroll_id].h_left = 0;
else if (w->scrolls[scroll_id].h_left >= 3)
w->scrolls[scroll_id].h_left -= 3;
widget_scroll_update_thumbs(w, widgetIndex);
widget_invalidate_by_number(w->classification, w->number, widgetIndex);
}
@ -733,9 +734,10 @@ static void input_scroll_part_update_vtop(rct_window *w, int widgetIndex, int sc
{;
if (window_find_by_number(w->classification, w->number)) {
w->scrolls[scroll_id].flags |= VSCROLLBAR_UP_PRESSED;
w->scrolls[scroll_id].v_top -= 3;
if (w->scrolls[scroll_id].v_top < 0)
w->scrolls[scroll_id].v_top = 0;
else if (w->scrolls[scroll_id].v_top >= 3)
w->scrolls[scroll_id].v_top -= 3;
widget_scroll_update_thumbs(w, widgetIndex);
widget_invalidate_by_number(w->classification, w->number, widgetIndex);
}