private void c1Chart1_MouseMove(object sender, MouseEventArgs e)
{
//handle dragging
if (cbAllowDragging.Checked)
{
if (dragging)
{
Point pt1 = c1Chart1.PointToScreen(move_pt);
if (!prev.IsEmpty)
{
ControlPaint.DrawReversibleLine(pt1, prev, c1Chart1.ChartArea.PlotArea.BackColor);
}
Point pt2 = c1Chart1.PointToScreen(new Point(e.X, e.Y));
ControlPaint.DrawReversibleLine(pt1, pt2, c1Chart1.ChartArea.PlotArea.BackColor);
prev = pt2;
}
else
{
int si = -1, pi = -1, dist = -1;
if (c1Chart1.ChartGroups[0].CoordToDataIndex(e.X, e.Y,
C1.Win.C1Chart.CoordinateFocusEnum.XandYCoord, ref si, ref pi, ref dist))
{
if (dist <= 6)
{
c1Chart1.Cursor = Cursors.Hand;
}
else
{
c1Chart1.Cursor = Cursors.Default;
}
}
else
{
c1Chart1.Cursor = Cursors.Default;
}
}
}
//handle trend cursor
Point mpt = new Point(e.X, e.Y);
PlotArea pa = c1Chart1.ChartArea.PlotArea;
Rectangle rect = new Rectangle(pa.Location, pa.Size);
if (rect.Contains(mpt) && this.cbTLCursor.Checked)
{
ChartGroup cg = c1Chart1.ChartGroups[0];
if (cg.ChartData.TrendsList.Count > 0)
{
TrendLine tl = cg.ChartData.TrendsList[0];
double x = 0, y = 0;
int ix = 0, iy = 0;
if (tl.RegressionStatistics != null)
{
if (cg.CoordToDataCoord(mpt.X, mpt.Y, ref x, ref y))
{
y = tl.GetY(x);
if (cg.DataCoordToCoord(x, y, ref ix, ref iy) && rect.Contains(ix, iy))
{
Point tlp = new Point(ix, iy);
hasPoint = true;
Rectangle invRect = new Rectangle(tlp.X - 8, tlp.Y - 8, 16, 16);
if (!tlp0.IsEmpty)
{
invRect = Rectangle.Union(invRect, new Rectangle(tlp0.X - 8, tlp0.Y - 8, 16, 16));
}
c1Chart1.Invalidate(invRect);
tlp0 = tlp;
return;
}
}
}
}
}
hasPoint = false;
}
