private void OnMouseMove(MouseHook.MouseEventArgs32 e)
{
User32.POINT ptCurr = e.MessageData.pt;
if (ptCurr.Equals(_prev))
{
//Debug.WriteLine("SKIP => Mouse Position:{0}", _prev);
return; //already been there
}
User32.POINT ptPrev = _prev;
_prev = e.MessageData.pt;
if (IsButtonDown || _screens.Count == 1 || !MouseHook.Hook.Enabled)
{
return; //ignore dragging or if one sceen only or if not enabled
}
int screenSrcIndex = ScreenFromPoint(ptPrev);
if (screenSrcIndex < 0) //point out of screen
{
return;
}
User32.POINT ptCorrected = CorrectIntoOtherScreenProportionally(ptPrev, ptCurr, screenSrcIndex);
if (ptCorrected.X != 0 || ptCorrected.Y != 0)
{
_prev = ptCorrected; //already handled
User32.SetCursorPos(ptCorrected.X, ptCorrected.Y);
}
}
private int CalcProportionalY(User32.POINT ptCurr, Rect rFrom, Rect rTo, User32.POINT delta)
{
double srcRatioFromTop = (ptCurr.Y - rFrom.Top) / rFrom.Height;
double dstY = rTo.Top + srcRatioFromTop * rTo.Height;
Debug.WriteLine("SrcRatio: {0:0.00} DstHeight:{1:0.0} DstY: {2:0.0}", srcRatioFromTop, rTo.Height, dstY);
return((int)dstY);
}
private int ScreenFromPoint(User32.POINT pt)
{
for (int i = 0; i < _screens.Count; i++)
{
if (_screens[i].DeviceBounds.Contains(pt.X, pt.Y))
{
return(i);
}
}
;
return(-1);
}
private int CorrectYIfNeeded(User32.POINT ptCurr, Rect rFrom, Rect rTo, User32.POINT delta)
{
if (ptCurr.Y > rTo.Top && ptCurr.Y < rTo.Bottom)
{
return(ptCurr.Y + delta.Y); //no correction needed
}
const int offsetY = 80;
int y = (int)rTo.Top + offsetY;
if (ptCurr.Y >= rTo.Bottom)
{
y = (int)(rTo.Bottom - offsetY);
}
return(y);
}
//if screens are different height - move mouse vertical proportionally to border
private User32.POINT CorrectIntoOtherScreenProportionally(User32.POINT ptPrev, User32.POINT ptCurr, int screenSrcIndex)
{
User32.POINT delta = ptCurr - ptPrev;
Rect rFrom = _screens[screenSrcIndex].DeviceBounds;
Rect rTo;
int maxDistanceFromBorder = 1 + Math.Abs(delta.X);
if (Math.Abs(ptCurr.X - _screens[screenSrcIndex].DeviceBounds.Left) < maxDistanceFromBorder) //close to left side
{
if (screenSrcIndex == 0 || delta.X >= 0) //left most or move away
{
return(new User32.POINT());
}
rTo = _screens[screenSrcIndex - 1].DeviceBounds;
Debug.WriteLine("LEFT => Mouse Position:{0} Delta:{1}", ptCurr, delta);
}
else if (Math.Abs(ptCurr.X - _screens[screenSrcIndex].DeviceBounds.Right) < maxDistanceFromBorder) //close to right side
{
if (screenSrcIndex == _screens.Count - 1 || delta.X <= 0) //right most or move away
{
return(new User32.POINT());
}
rTo = _screens[screenSrcIndex + 1].DeviceBounds;
Debug.WriteLine("RIGHT => Mouse Position:{0} Delta:{1}", ptCurr, delta);
}
else
{
//Debug.WriteLine("MIDDLE => Mouse Position:{0} Delta:{1}", ptCurr, delta);
return(new User32.POINT());
}
int dstY = CalcProportionalY(ptCurr, rFrom, rTo, delta);
//int dstY = CorrectYIfNeeded(ptCurr, rFrom, rTo, delta);
User32.POINT corrected = new User32.POINT(ptCurr.X + delta.X, dstY);
Debug.WriteLine("Corrected Mouse Position: {0} Delta:{1}", corrected, delta);
return(corrected);
}