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Only warp pointer once for a sequence of consecutive move events. Further reduces lag when dragging scrollbar.

This commit is contained in:
Michael Drake 2012-07-26 23:14:27 +01:00
parent 514bee5786
commit 382c2f2289
1 changed files with 28 additions and 5 deletions
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33
framebuffer/fbtk/event.c
View File

@ -188,14 +188,31 @@ fbtk_warp_pointer(fbtk_widget_t *widget, int x, int y, bool relative)
bool
fbtk_event(fbtk_widget_t *root, nsfb_event_t *event, int timeout)
{
nsfb_bbox_t cloc;
bool unused = false; /* is the event available */
bool move_pointer = false; /* whether pointer move events occured */
/* ensure we have the root widget */
root = fbtk_get_root_widget(root);
do {
if (nsfb_event(root->u.root.fb, event, timeout) == false)
if (nsfb_event(root->u.root.fb, event, timeout) == false) {
if (move_pointer)
fbtk_warp_pointer(root, cloc.x0, cloc.y0,
false);
return false;
}
if (move_pointer && event->type != NSFB_EVENT_MOVE_RELATIVE &&
event->type != NSFB_EVENT_MOVE_ABSOLUTE) {
/* Flush the movements */
fbtk_warp_pointer(root, cloc.x0, cloc.y0, false);
} else if (!move_pointer &&
event->type == NSFB_EVENT_MOVE_RELATIVE) {
/* Get current pointer coords */
nsfb_cursor_loc_get(root->u.root.fb, &cloc);
}
switch (event->type) {
case NSFB_EVENT_KEY_DOWN:
@ -213,14 +230,20 @@ fbtk_event(fbtk_widget_t *root, nsfb_event_t *event, int timeout)
break;
case NSFB_EVENT_MOVE_RELATIVE:
fbtk_warp_pointer(root, event->value.vector.x,
event->value.vector.y, true);
/* Consecutive move events are consolidated into a
* single pointer warp */
move_pointer = true;
cloc.x0 += event->value.vector.x;
cloc.y0 += event->value.vector.y;
timeout = 0;
break;
case NSFB_EVENT_MOVE_ABSOLUTE:
fbtk_warp_pointer(root, event->value.vector.x,
event->value.vector.y, false);
/* Consecutive move events are consolidated into a
* single pointer warp */
move_pointer = true;
cloc.x0 = event->value.vector.x;
cloc.y0 = event->value.vector.y;
timeout = 0;
break;