diff options
Diffstat (limited to 'src/fl_scroll_area.cxx')
| -rw-r--r-- | src/fl_scroll_area.cxx | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/fl_scroll_area.cxx b/src/fl_scroll_area.cxx index 9dad3e7d4..4a361c37a 100644 --- a/src/fl_scroll_area.cxx +++ b/src/fl_scroll_area.cxx @@ -35,8 +35,19 @@ #include <FL/fl_draw.H> // scroll a rectangle and redraw the newly exposed portions: +/** + Scroll a rectangle and draw the newly exposed portions. + \param[in] X,Y position of top-left of rectangle + \param[in] W,H size of rectangle + \param[in] dx,dy pixel offsets for shifting rectangle + \param[in] draw_area callback function to draw rectangular areas + \param[in] data pointer to user data for callback + The contents of the rectangular area is first shifted by \a dx + and \a dy pixels. The \a draw_area callback is then called for + every newly exposed rectangular area. + */ void fl_scroll(int X, int Y, int W, int H, int dx, int dy, - void (*draw_area)(void*, int,int,int,int), void* data) + void (*draw_area)(void*, int,int,int,int), void* data) { if (!dx && !dy) return; if (dx <= -W || dx >= W || dy <= -H || dy >= H) { |