/* Monitors for 1 finger touch and forces left button press or 1 finger
* release and will remove left button press.
*
* This function relies on wcmGestureMode will only be zero if
* WACOM_GESTURE_LAG_TIME has passed and still ony 1 finger on screen.
*/
static void wcmSingleFingerPress(WacomDevicePtr priv)
{
WacomCommonPtr common = priv->common;
WacomChannelPtr firstChannel = getContactNumber(common, 0);
WacomChannelPtr secondChannel = getContactNumber(common, 1);
Bool firstInProx = firstChannel && firstChannel->valid.states[0].proximity;
Bool secondInProx = secondChannel && secondChannel->valid.states[0].proximity;
DBG(10, priv, "\n");
/* This gesture is only valid on touchscreens. */
if (!TabletHasFeature(priv->common, WCM_LCD))
return;
if (!firstChannel)
return;
if (firstInProx && !secondInProx) {
firstChannel->valid.states[0].buttons |= 1;
common->wcmGestureMode = GESTURE_DRAG_MODE;
}
else {
firstChannel->valid.states[0].buttons &= ~1;
common->wcmGestureMode = GESTURE_NONE_MODE;
}
}
/* A single finger tap is defined as 1 finger tap that lasts less than
* wcmTapTime. It results in a left button press.
*
* Some work must be done to make sure two fingers were not touching
* during this gesture. This is easy if first finger is released
* first. To handle case of second finger released first, require
* second finger to have been released before first finger ever touched.
*
* Function relies on ds[0/1].sample to be updated only when entering or
* exiting proximity so no storage is needed when initial touch occurs.
*/
static void wcmSingleFingerTap(WacomDevicePtr priv)
{
WacomCommonPtr common = priv->common;
WacomDeviceState ds[2] = {}, dsLast[2] = {};
getStateHistory(common, ds, ARRAY_SIZE(ds), 0);
getStateHistory(common, dsLast, ARRAY_SIZE(dsLast), 1);
DBG(10, priv, "\n");
/* This gesture is only valid on touchpads. */
if (TabletHasFeature(priv->common, WCM_LCD))
return;
if (!ds[0].proximity && dsLast[0].proximity && !ds[1].proximity)
{
/* Single Tap must have lasted less than wcmTapTime
* and second finger must not have released after
* first finger touched.
*/
if (ds[0].sample - dsLast[0].sample <=
common->wcmGestureParameters.wcmTapTime &&
ds[1].sample < dsLast[0].sample)
{
common->wcmGestureMode = GESTURE_PREDRAG_MODE;
/* Delay to detect possible drag operation */
TimerSet(priv->tap_timer, 0, common->wcmGestureParameters.wcmTapTime, wcmSingleFingerTapTimer, priv);
}
}
}
/**
* Send multitouch events. If entering multitouch mode (indicated by
* GESTURE_LAG_MODE), then touch events are sent for all in-prox
* contacts. Otherwise, only the specified contact has a touch event
* generated.
*
* @param[in] priv
* @param[in] contact_id ID of the contact to send event for (at minimum)
*/
static void
wcmFingerMultitouch(WacomDevicePtr priv, int contact_id) {
Bool lag_mode = priv->common->wcmGestureMode == GESTURE_LAG_MODE;
Bool prox = FALSE;
int i;
if (lag_mode && TabletHasFeature(priv->common, WCM_LCD)) {
/* wcmSingleFingerPress triggers a button press as
* soon as a single finger appears. ensure we release
* that button before getting too far along
*/
wcmSendButtonClick(priv, 1, 0);
}
for (i = 0; i < MAX_CHANNELS; i++) {
WacomChannelPtr channel = priv->common->wcmChannel+i;
WacomDeviceState state = channel->valid.state;
if (state.device_type != TOUCH_ID)
continue;
if (lag_mode || state.serial_num == contact_id + 1) {
wcmSendTouchEvent(priv, channel, lag_mode);
}
prox |= state.proximity;
}
if (!prox)
priv->common->wcmGestureMode = GESTURE_NONE_MODE;
else if (lag_mode)
priv->common->wcmGestureMode = GESTURE_MULTITOUCH_MODE;
}
/* A single finger tap is defined as 1 finger tap that lasts less than
* wcmTapTime. It results in a left button press.
*
* Some work must be done to make sure two fingers were not touching
* during this gesture. This is easy if first finger is released
* first. To handle case of second finger released first, require
* second finger to have been released before first finger ever touched.
*
* Function relies on ds[0/1].sample to be updated only when entering or
* exiting proximity so no storage is needed when initial touch occurs.
*/
static void wcmSingleFingerTap(WacomDevicePtr priv)
{
WacomCommonPtr common = priv->common;
WacomChannelPtr firstChannel = common->wcmChannel;
WacomChannelPtr secondChannel = common->wcmChannel + 1;
WacomDeviceState ds[2] = { firstChannel->valid.states[0],
secondChannel->valid.states[0] };
WacomDeviceState dsLast[2] = { firstChannel->valid.states[1],
secondChannel->valid.states[1] };
DBG(10, priv, "\n");
/* This gesture is only valid on touchpads. */
if (TabletHasFeature(priv->common, WCM_LCD))
return;
if (!ds[0].proximity && dsLast[0].proximity && !ds[1].proximity)
{
/* Single Tap must have lasted less than wcmTapTime
* and second finger must not have released after
* first finger touched.
*/
if (ds[0].sample - dsLast[0].sample <=
common->wcmGestureParameters.wcmTapTime &&
ds[1].sample < dsLast[0].sample)
{
common->wcmGestureMode = GESTURE_PREDRAG_MODE;
/* Delay to detect possible drag operation */
TimerSet(NULL, 0, common->wcmGestureParameters.wcmTapTime, wcmSingleFingerTapTimer, priv);
}
}
}
/* Monitors for 1 finger touch and forces left button press or 1 finger
* release and will remove left button press.
*
* This function relies on wcmGestureMode will only be zero if
* WACOM_GESTURE_LAG_TIME has passed and still ony 1 finger on screen.
*/
static void wcmSingleFingerPress(WacomDevicePtr priv)
{
WacomCommonPtr common = priv->common;
WacomChannelPtr firstChannel = common->wcmChannel;
WacomChannelPtr secondChannel = common->wcmChannel + 1;
WacomDeviceState ds[2] = { firstChannel->valid.states[0],
secondChannel->valid.states[0] };
DBG(10, priv, "\n");
/* This gesture is only valid on touchscreens. */
if (!TabletHasFeature(priv->common, WCM_LCD))
return;
if (ds[0].proximity && !ds[1].proximity)
firstChannel->valid.states[0].buttons |= 1;
if (!ds[0].proximity && !ds[1].proximity)
firstChannel->valid.states[0].buttons &= ~1;
}
