Hello Amol,
Sorry for the delay.
1. Want to change line color too. (Means after rotating line at any point of time we can change line color too)
I think you can use to change the color of line g.Pen.Color in
AfterDrawEvent as do in next lines of code:
2. Another query, as currently we have to create first line by dragging mouse and then we can rotate it by the help of picking pointer. In this only one improvement we want that instead of creating line by mouse, Line should be drawn by default at any location with two pick points. So that we can directly rotate line by choosing any pick point.
You can draw directly line using
DrawLineItems and
StartPos and
EndPos properties as do in Yeray's code that I have modified of:
Code: Select all
Steema.TeeChart.Styles.Points points1;
Steema.TeeChart.Tools.DrawLine drawline1;
private void InitializeChart()
{
tChart1.Aspect.View3D = false;
tChart1.Legend.Visible = false;
points1 = new Steema.TeeChart.Styles.Points(tChart1.Chart);
points1.FillSampleValues();
drawline1 = new Steema.TeeChart.Tools.DrawLine(tChart1.Chart);
drawline1.NewLine += new Steema.TeeChart.Tools.DrawLineEventHandler(drawline1_NewLine);
Steema.TeeChart.Tools.DrawLineItem I = new Steema.TeeChart.Tools.DrawLineItem(drawline1);
/* set the "Y" line positions (start and end position) */
double tmp = points1.YValues.Range / 5.0;
I.StartPos = new Steema.TeeChart.Drawing.PointDouble(5, (points1.YValues.Maximum - tmp));
I.EndPos = new Steema.TeeChart.Drawing.PointDouble(15, (points1.YValues.Minimum + tmp));
drawline1.EnableDraw = false;
tChart1.AfterDraw += new Steema.TeeChart.PaintChartEventHandler(tChart1_AfterDraw);
}
void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
{
for (int i = 0; i < drawline1.Lines.Count; i++)
{
int X0 = tChart1.Axes.Bottom.CalcPosValue(drawline1.Lines[0].StartPos.X);
int Y0 = tChart1.Axes.Left.CalcPosValue(drawline1.Lines[0].StartPos.Y);
int X1 = tChart1.Axes.Bottom.CalcPosValue(drawline1.Lines[0].EndPos.X);
int Y1 = tChart1.Axes.Left.CalcPosValue(drawline1.Lines[0].EndPos.Y);
int X3, Y3, X4, Y4;
double alfa = Math.Atan2(Y1 - Y0, X1 - X0);
double alfad = (alfa * (180.0 / Math.PI)) % 360;
g.Pen.Color = Color.Red;
if ((alfad == 90) || (alfad == -90))
{
g.VerticalLine(X0, tChart1.Axes.Left.IStartPos, tChart1.Axes.Left.IEndPos);
}
else if ((alfad == 180) || (alfad == 0))
{
g.HorizontalLine(tChart1.Axes.Bottom.IStartPos, tChart1.Axes.Bottom.IEndPos, Y0);
}
else if ((alfad > 90) || ((alfad > -90) && (alfad < 0)))
{
X3 = Math.Max(X1 + (int)((tChart1.Axes.Left.IEndPos - Y1) / Math.Tan(alfa)), tChart1.Axes.Bottom.IStartPos);
Y3 = Math.Min(Y1 + (int)(Math.Tan(alfa) * (tChart1.Axes.Bottom.IStartPos - X1)), tChart1.Axes.Left.IEndPos);
X4 = Math.Min(X0 + (int)((tChart1.Axes.Left.IStartPos - Y0) / Math.Tan(alfa)), tChart1.Axes.Bottom.IEndPos);
Y4 = Math.Max(Y0 + (int)(Math.Tan(alfa) * (tChart1.Axes.Bottom.IEndPos - X0)), tChart1.Axes.Left.IStartPos);
g.Line(X3, Y3, X4, Y4);
}
else
{
X3 = Math.Max(X0 + (int)((tChart1.Axes.Left.IStartPos - Y0) / Math.Tan(alfa)), tChart1.Axes.Bottom.IStartPos);
Y3 = Math.Max(Y1 - (int)(Math.Tan(alfa) * (X1 - tChart1.Axes.Bottom.IStartPos)), tChart1.Axes.Left.IStartPos);
X4 = Math.Min(X1 + (int)((tChart1.Axes.Left.IEndPos - Y1) / Math.Tan(alfa)), tChart1.Axes.Bottom.IEndPos);
Y4 = Math.Min(Y0 - (int)(Math.Tan(alfa) * (X0 - tChart1.Axes.Bottom.IEndPos)), tChart1.Axes.Left.IEndPos);
g.Line(X3, Y3, X4, Y4);
}
}
}
void drawline1_NewLine(Steema.TeeChart.Tools.DrawLine sender)
{
drawline1.Lines[drawline1.Lines.Count - 1].Pen.Visible = false;
}
Could you tell us if previous code works as you expected?
I hope will helps.
Thanks,
