public static Control FindControlAtCursor(DrawPanel dp)
{
Point pos = Cursor.Position;
if (dp.Bounds.Contains(pos))
{
return(FindControlAtPoint(dp, dp.PointToClient(pos)));
}
return(null);
}
// add lines to drawLines when mouse is moving with time interval of 10
private void GetPoints(object sender, EventArgs e)
{
finish = DrawPanel.PointToClient(Cursor.Position);
points.Add(new Tuple <Point, Point>(start, finish));
start = finish;
}
private void MusicCircleVisualDraw()
{
int fqEndIndex = (int)(circleFrequencyEnd / frequencyPerIndex);
double[] resultPaint = DftData.Take(fqEndIndex).ToArray();
Graphics g = bufferedGraphics.Graphics;
float
dataRight = resultPaint.Length, panelRight = DrawPanel.Width, panelHeight = DrawPanel.Height;
dftDataFilter ??= (v) => v;
int centerX = DrawPanel.Width / 2,
centerY = DrawPanel.Height / 2;
float offsetXPix = curOffsetX, offsetYPix = curOffsetY;
Point mouse = DrawPanel.PointToClient(MousePosition);
if (mouse.X > 0 && mouse.Y > 0 && mouse.X < DrawPanel.Width && mouse.Y < DrawPanel.Height || true)
{
double
halfX = DrawPanel.Width / 2,
halfY = DrawPanel.Height / 2;
double
offsetX = (halfX - mouse.X) / halfX * maxOffset,
offsetY = (halfY - mouse.Y) / halfY * maxOffset;
offsetXPix = (int)(curOffsetX + (offsetX - curOffsetX) * offsetSpeed);
offsetYPix = (int)(curOffsetY + (offsetY - curOffsetY) * offsetSpeed);
curOffsetX = offsetXPix;
curOffsetY = offsetYPix;
}
if (circleCurOffset > 360)
{
circleCurOffset = 0;
}
double piOffset = circleCurOffset / 360f * Math.PI * 2;
double radius = Math.Min(DrawPanel.Width, DrawPanel.Height) / 2d;
double halfradius = radius / 2;
double scale = resultPaint.Average() / halfradius / 1 + 1;
int resultPaintLength = resultPaint.Length;
PointF[] points = Enumerable.Range(0, resultPaintLength).Select((v) =>
{
double deg = (double)v / resultPaintLength * Math.PI * 2 + piOffset,
value = dftDataFilter((float)resultPaint[v] * circleMultiple),
sin = Math.Sin(deg),
cos = Math.Cos(deg);
PointF p = new PointF(
(float)(centerX + halfradius * cos * scale + value * cos) + offsetXPix,
(float)(centerY + halfradius * sin * scale + value * sin) + offsetYPix);
return(p);
}).ToArray();
circleCurOffset += circleOffsetPerFrame;
try
{
g.DrawClosedCurve(globalDrawPen, points);
}
catch (Exception) { }
}