LetterWheelLetter LtrFromArgs(MouseEventArgs args)
{
var pt = args.GetPosition(this);
LetterWheelLetter ltrUnderMouse = null;
var x = this.InputHitTest(pt);
if (x != null)
{
if (x is TextBlock)
{
ltrUnderMouse = VisualTreeHelper.GetParent(x as TextBlock) as LetterWheelLetter;
}
else if (x is LetterWheelLetter)
{
ltrUnderMouse = x as LetterWheelLetter;
}
else if (x is Ellipse)
{
if (!_mouseIsDown) // for the 1st mousedown, we'll allow a larger area
{
// calc x,y with circCtr as origin
var ptInCirc = new Point(pt.X - _ptCircleCtr.X, _ptCircleCtr.Y - pt.Y);
//var radsPerLetter = (2 * Math.PI / NumLtrs);
//var theta = Math.Atan2(ptInCirc.Y, ptInCirc.X);
//if (theta < 0)
//{
// theta += 2 * Math.PI;
//}
//var ltrWheelNdx = (theta / (radsPerLetter));
//ltrUnderMouse = Children.OfType<LetterWheelLetter>().Skip((int)(ltrWheelNdx)).First();
LetterWheelLetter closestLetterWheelLetter = null;
var minDist = double.MaxValue;
foreach (var ltrWheelLtr in Children.OfType <LetterWheelLetter>())
{
var pttry = new Point(Canvas.GetLeft(ltrWheelLtr) + ltrWheelLtr.Width / 2 - _ptCircleCtr.X, _ptCircleCtr.Y - Canvas.GetTop(ltrWheelLtr) - ltrWheelLtr.Height / 2); // center of letter
var dist = Math.Sqrt(Math.Pow((pttry.X - ptInCirc.X), 2) + Math.Pow((pttry.Y - ptInCirc.Y), 2));
if (dist < minDist)
{
closestLetterWheelLetter = ltrWheelLtr;
minDist = dist;
}
}
if (minDist <= closestLetterWheelLetter.Height)
{
ltrUnderMouse = closestLetterWheelLetter;
}
}
}
}
return(ltrUnderMouse);
}
private void CreateCircle()
{
this.Children.Clear();
// this.Background = Brushes.AliceBlue;
var circRadius = 110;
var circ = new Ellipse()
{
Width = 2 * circRadius,
Height = 2 * circRadius,
Fill = Brushes.White,
StrokeThickness = 3,
Stroke = Brushes.Black
};
_ptCirclePos = new Point(this.ActualWidth / 2 - circ.Width / 2, 0); //new Point(60, 10);
Canvas.SetLeft(circ, _ptCirclePos.X);
Canvas.SetTop(circ, _ptCirclePos.Y);
_ptCircleCtr = new Point(_ptCirclePos.X + circ.Width / 2, _ptCirclePos.Y + circ.Height / 2);
this.Children.Add(circ);
int ndx = 0;
var radsPerLetter = (2 * Math.PI / NumLtrs);
foreach (var ltr in _wordCont.InitialWord.ToUpper().OrderBy(p => gridgen._random.NextDouble())) // shuffle
// foreach (var ltr in wordCont.InitialWord.ToUpper().OrderBy(p => Guid.NewGuid()))
{
var lett = new LetterWheelLetter(ltr);
_lstLetters.Add(lett);
var x = _ptCircleCtr.X + _pctRadiusLettersInCircle * circRadius * Math.Cos(radsPerLetter * ndx) - lett.Width / 2;
var y = _ptCircleCtr.Y - _pctRadiusLettersInCircle * circRadius * Math.Sin(radsPerLetter * ndx) - lett.Height / 2;
var letpt = new Point(x, y);
Canvas.SetLeft(lett, letpt.X);
Canvas.SetTop(lett, letpt.Y);
this.Children.Add(lett);
ndx++;
}
this.Children.Add(polyLine);
}