public void touchesMoved(TouchpadEventArgs arg)
{
if (arg.touches.Length != 2)
{
return;
}
Touch lastT0 = arg.touches[0].previousTouch;
Touch lastT1 = arg.touches[1].previousTouch;
Touch T0 = arg.touches[0];
Touch T1 = arg.touches[1];
//mouse wheel 120 == 1 wheel click according to Windows API
double lastMidX = (lastT0.hwX + lastT1.hwX) / 2d, lastMidY = (lastT0.hwY + lastT1.hwY) / 2d,
currentMidX = (T0.hwX + T1.hwX) / 2d, currentMidY = (T0.hwY + T1.hwY) / 2d;
double coefficient = Global.ScrollSensitivity[deviceNumber];
// Adjust for touch distance: "standard" distance is 960 pixels, i.e. half the width. Scroll farther if fingers are farther apart, and vice versa, in linear proportion.
double touchXDistance = T1.hwX - T0.hwX, touchYDistance = T1.hwY - T0.hwY, touchDistance = Math.Sqrt(touchXDistance * touchXDistance + touchYDistance * touchYDistance);
coefficient *= touchDistance / 960.0;
// Collect rounding errors instead of losing motion.
double xMotion = coefficient * (currentMidX - lastMidX);
if ((xMotion > 0.0 && horizontalRemainder > 0.0) || (xMotion < 0.0 && horizontalRemainder < 0.0))
{
xMotion += horizontalRemainder;
}
int xAction = (int)xMotion;
horizontalRemainder = xMotion - xAction;
double yMotion = coefficient * (lastMidY - currentMidY);
if ((yMotion > 0.0 && verticalRemainder > 0.0) || (yMotion < 0.0 && verticalRemainder < 0.0))
{
yMotion += verticalRemainder;
}
int yAction = (int)yMotion;
verticalRemainder = yMotion - yAction;
if (yAction != 0 || xAction != 0)
{
InputMethods.MouseWheel(yAction, xAction);
}
}
public void touchesMoved(TouchpadEventArgs arg)
{
if (arg.touches.Length != 1)
{
return;
}
int deltaX, deltaY;
if (arg.touches[0].touchID != lastTouchID)
{
deltaX = deltaY = 0;
horizontalRemainder = verticalRemainder = 0.0;
horizontalDirection = verticalDirection = Direction.Neutral;
lastTouchID = arg.touches[0].touchID;
}
else if (Global.TouchpadJitterCompensation[deviceNumber])
{
// Often the EAll4's internal jitter compensation kicks in and starts hiding changes, ironically creating jitter...
deltaX = arg.touches[0].deltaX;
deltaY = arg.touches[0].deltaY;
// allow only very fine, slow motions, when changing direction, even from neutral
// TODO maybe just consume it completely?
if (deltaX <= -1)
{
if (horizontalDirection != Direction.Negative)
{
deltaX = -1;
horizontalRemainder = 0.0;
}
}
else if (deltaX >= 1)
{
if (horizontalDirection != Direction.Positive)
{
deltaX = 1;
horizontalRemainder = 0.0;
}
}
if (deltaY <= -1)
{
if (verticalDirection != Direction.Negative)
{
deltaY = -1;
verticalRemainder = 0.0;
}
}
else if (deltaY >= 1)
{
if (verticalDirection != Direction.Positive)
{
deltaY = 1;
verticalRemainder = 0.0;
}
}
}
else
{
deltaX = arg.touches[0].deltaX;
deltaY = arg.touches[0].deltaY;
}
double coefficient = Global.TouchSensitivity[deviceNumber] / 100.0;
// Collect rounding errors instead of losing motion.
double xMotion = coefficient * deltaX;
if (xMotion > 0.0)
{
if (horizontalRemainder > 0.0)
{
xMotion += horizontalRemainder;
}
}
else if (xMotion < 0.0)
{
if (horizontalRemainder < 0.0)
{
xMotion += horizontalRemainder;
}
}
int xAction = (int)xMotion;
horizontalRemainder = xMotion - xAction;
double yMotion = coefficient * deltaY;
if (yMotion > 0.0)
{
if (verticalRemainder > 0.0)
{
yMotion += verticalRemainder;
}
}
else if (yMotion < 0.0)
{
if (verticalRemainder < 0.0)
{
yMotion += verticalRemainder;
}
}
int yAction = (int)yMotion;
verticalRemainder = yMotion - yAction;
if (yAction != 0 || xAction != 0)
{
InputMethods.MoveCursorBy(xAction, yAction);
}
horizontalDirection = xMotion > 0.0 ? Direction.Positive : xMotion < 0.0 ? Direction.Negative : Direction.Neutral;
verticalDirection = yMotion > 0.0 ? Direction.Positive : yMotion < 0.0 ? Direction.Negative : Direction.Neutral;
}