void ProcessPacket(SYNCOMLib.SynPacket packet)
{
int extraState = 0;
int fingerState = 0;
int xDelta = 0;
int yDelta = 0;
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_ExtraFingerState, ref extraState);
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_FingerState, ref fingerState);
// only read horizontal offset when shift key is down or caps lock is on
if (Control.ModifierKeys.HasFlag(Keys.Shift) || Control.IsKeyLocked(Keys.CapsLock))
{
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_XDelta, ref xDelta);
}
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_YDelta, ref yDelta);
int numOfFingers = extraState & 3;
// no finger
if ((fingerState & (int)SYNCTRLLib.SynFingerFlags.SF_FingerPresent) == 0)
{
m_actionStarted = false;
m_gestureInProgress = false;
m_scrolling = false;
return;
}
if ((fingerState & (int)SYNCTRLLib.SynFingerFlags.SF_FingerMotion) == 0)
{
return;
}
if (Math.Abs(xDelta) > motionThreshhold || Math.Abs(yDelta) > motionThreshhold)
{
return;
}
// 2 finger scroll
if (numOfFingers == 2)
{
int x = 0;
int y = 0;
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_X, ref x);
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_Y, ref y);
// not at edges
if (!(x <= m_xMin || x >= m_xMax || y <= m_yMin || y >= m_yMax))
{
DoScroll(xDelta, yDelta);
}
m_scrolling = true;
}
else if (numOfFingers == 1 && m_scrolling)
{
DoScroll(xDelta, yDelta);
}
else if (numOfFingers == 3 && !m_actionStarted)
{
Handle3FingerGestures(packet);
}
}
private void Handle3FingerGestures(SYNCOMLib.SynPacket packet)
{
int x = 0;
int y = 0;
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_X, ref x);
packet.GetProperty((int)SYNCTRLLib.SynPacketProperty.SP_Y, ref y);
if (!m_gestureInProgress)
{
m_gestureInProgress = true;
m_startPosition = new System.Drawing.Point(x, y);
}
else
{
int xSwipe = x - m_startPosition.X;
int ySwipe = y - m_startPosition.Y;
if (Math.Abs(ySwipe) > Math.Abs(xSwipe))
{
if (ySwipe > pushPullThreshold)
{
// push
m_actionStarted = true;
DoKeySeq(m_cpl.UpAction.KeySeq);
}
else if (ySwipe < (-pushPullThreshold))
{
// pull
m_actionStarted = true;
DoKeySeq(m_cpl.DownAction.KeySeq);
}
}
else
{
if (xSwipe < -swipeThreshold)
{
// left
m_actionStarted = true;
DoKeySeq(m_cpl.LeftAction.KeySeq);
}
else if (xSwipe > swipeThreshold)
{
// right
m_actionStarted = true;
DoKeySeq(m_cpl.RightAction.KeySeq);
}
}
}
}
