private void btnEvalAt_Click(object sender, EventArgs e)
{
double fx;
string s = InputBoxForm.GetStrInput("Eval at x=", "1.5");
if (s == null || s == "")
{
return;
}
if (!double.TryParse(s.Replace(" ", ""), out fx))
{
MessageBox.Show("Couldn't parse number."); return;
}
StringBuilder sbCode = new StringBuilder();
sbCode.AppendLine(this.txtInit.Text);
sbCode.AppendLine("double x=" + fx.ToString(CultureInfo.InvariantCulture) + ";");
sbCode.AppendLine("double y;");
sbCode.AppendLine(getUserExpression(this.txtEq1.Text)); //translate one line into code
sbCode.AppendLine("ans = y;");
string strError;
CodedomEvaluator.CodedomEvaluator cb = new CodedomEvaluator.CodedomEvaluator();
double fOut = cb.mathEval(sbCode.ToString(), new Dictionary <string, double>(), out strError);
if (strError != "")
{
MessageBox.Show(strError); return;
}
MessageBox.Show("y= " + fOut.ToString());
}
private void btnSetView_Click(object sender, EventArgs e)
{
double x0, x1, y0, y1;
string s = InputBoxForm.GetStrInput("Enter boundaries, separated by commas:", "-10,10,-10,10");
if (s == null || s == "")
{
return;
}
string[] ss = s.Split(new char[] { ',' });
if (ss.Length != 4)
{
MessageBox.Show("Couldn't parse boundaries."); return;
}
if (!double.TryParse(ss[0].Replace(" ", ""), out x0))
{
MessageBox.Show("Couldn't parse boundaries."); return;
}
if (!double.TryParse(ss[1].Replace(" ", ""), out x1))
{
MessageBox.Show("Couldn't parse boundaries."); return;
}
if (!double.TryParse(ss[2].Replace(" ", ""), out y0))
{
MessageBox.Show("Couldn't parse boundaries."); return;
}
if (!double.TryParse(ss[3].Replace(" ", ""), out y1))
{
MessageBox.Show("Couldn't parse boundaries."); return;
}
this.pointPlotUserControl1.setBounds(x0, x1, y0, y1);
this.pointPlotUserControl1.redraw();
}
public static string GetStrInput(string strPrompt, string strCurrent)
{
InputBoxForm myForm = new InputBoxForm();
myForm.label1.Text = strPrompt;
myForm.txtMessage.Text = strCurrent;
myForm.ShowDialog(new Form());
if (myForm.DialogResult == DialogResult.OK)
{
return(myForm.Message);
}
else
{
return(null);
}
}