diff options
| author | Peter Osterlund <petero2@telia.com> | 2005-01-06 13:41:39 +0100 |
|---|---|---|
| committer | Peter Osterlund <petero2@telia.com> | 2006-04-09 04:03:04 +0200 |
| commit | 87e31f868566f0e2669aec9742833a7c800ca678 (patch) | |
| tree | b3ab878690f5f243f2e3c4cddc058eced46537b7 /synaptics.c | |
| parent | d0754c4c39287af2c87aeb280d46f2325849b846 (diff) | |
When coasting starts, take the partial scroll step from the
manual scrolling into account. This eliminates a small delay before the
first generated coasting scroll event.
Diffstat (limited to 'synaptics.c')
| -rw-r--r-- | synaptics.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/synaptics.c b/synaptics.c index fe6f5e1..a11bfbb 100644 --- a/synaptics.c +++ b/synaptics.c @@ -1277,10 +1277,13 @@ struct ScrollData { }; static void -start_coasting(SynapticsPrivate *priv, edge_type edge) +start_coasting(SynapticsPrivate *priv, struct SynapticsHwState *hw, edge_type edge) { SynapticsSHM *para = priv->synpara; + priv->autoscroll_y = 0.0; + priv->autoscroll_x = 0.0; + if ((priv->scroll_packet_count > 3) && (para->coasting_speed > 0.0)) { double pkt_time = (HIST(0).millis - HIST(3).millis) / 1000.0; if (priv->vert_scroll_on || @@ -1289,22 +1292,24 @@ start_coasting(SynapticsPrivate *priv, edge_type edge) int sdelta = para->scroll_dist_vert; if ((edge & RIGHT_EDGE) && pkt_time > 0 && sdelta > 0) { double scrolls_per_sec = dy / pkt_time / sdelta; - if (fabs(scrolls_per_sec) >= para->coasting_speed) + if (fabs(scrolls_per_sec) >= para->coasting_speed) { priv->autoscroll_yspd = scrolls_per_sec; + priv->autoscroll_y = (hw->y - priv->scroll_y) / (double)sdelta; + } } } else { double dx = estimate_delta(HIST(0).x, HIST(1).x, HIST(2).x, HIST(3).x); int sdelta = para->scroll_dist_horiz; if ((edge & BOTTOM_EDGE) && pkt_time > 0 && sdelta > 0) { double scrolls_per_sec = dx / pkt_time / sdelta; - if (fabs(scrolls_per_sec) >= para->coasting_speed) + if (fabs(scrolls_per_sec) >= para->coasting_speed) { priv->autoscroll_xspd = scrolls_per_sec; + priv->autoscroll_x = (hw->x - priv->scroll_x) / (double)sdelta; + } } } } priv->scroll_packet_count = 0; - priv->autoscroll_y = 0.0; - priv->autoscroll_x = 0.0; } static int @@ -1365,7 +1370,7 @@ HandleScrolling(SynapticsPrivate *priv, struct SynapticsHwState *hw, scroll_stop = TRUE; } if (scroll_stop) { - start_coasting(priv, edge); + start_coasting(priv, hw, edge); priv->circ_scroll_on = FALSE; priv->vert_scroll_on = FALSE; priv->horiz_scroll_on = FALSE; |