private void CBPolynomial_SelectedIndexChanged(object sender, EventArgs e)
{
//Clear DifDiv
difDiv.Clear();
//Calculate f(x_i) <=> y_i and change values in DGVPoints and in Dictionary
double result = 0.0;
for (int i = 0; i < DGVPoints.RowCount; i++)
{
result = (double)((KeyValuePair <string, Func <double, double> >)CBPolynomial.SelectedItem).Value.DynamicInvoke(Convert.ToDouble(DGVPoints[1, i].Value));
DGVPoints[2, i].Value = result;
if (DGVPointsDict.Count == DGVPoints.RowCount)
{
DGVPointsDict[i] = new KeyValuePair <double, double>(DGVPointsDict[i].Key, Convert.ToDouble(DGVPoints[2, i].Value));
}
}
difDiv.Clear();
GenerateDifDiv(0, DGVPoints.RowCount - 1);
DGVPoints.InvalidateColumn(2);
if (true)
{
plotView1.Model = null;
plotView1.Model = new PlotModel();
}
//Plot
for (int i = plotView1.Model.Series.Count - 1; i >= 0; i--)
{
plotView1.Model.Series.RemoveAt(i);
}
string title = ((KeyValuePair <string, Func <double, double> >)CBPolynomial.SelectedItem).Key;
plotView1.Model.Series.Add(new OxyPlot.Series.FunctionSeries(((KeyValuePair <string, Func <double, double> >)CBPolynomial.SelectedItem).Value, -100, 100, 0.1, title));
plotView1.Model.Axes.Add(new OxyPlot.Axes.LinearAxis {
Position = OxyPlot.Axes.AxisPosition.Left, ExtraGridlines = new double[] { 0 }, ExtraGridlineThickness = 1, ExtraGridlineColor = OxyColors.Black, MajorGridlineStyle = LineStyle.Solid, MinorGridlineStyle = LineStyle.Dot
});
plotView1.Model.Axes.Add(new OxyPlot.Axes.LinearAxis {
Position = OxyPlot.Axes.AxisPosition.Bottom, ExtraGridlines = new double[] { 0 }, ExtraGridlineThickness = 1, ExtraGridlineColor = OxyColors.Black, MajorGridlineStyle = LineStyle.Solid, MinorGridlineStyle = LineStyle.Dot
});
plotView1.Model.Axes[1].AbsoluteMinimum = -100;
plotView1.Model.Axes[1].AbsoluteMaximum = 100;
if (scatterSeries.Points.Count != 0)
{
scatterSeries.Points.Clear();
foreach (KeyValuePair <double, double> item in DGVPointsDict.Values)
{
scatterSeries.Points.Add(new ScatterPoint(item.Key, item.Value, 5, 1));
}
plotView1.Model.Series.Remove(scatterSeries);
plotView1.Model.Series.Add(scatterSeries);
}
plotView1.Model.InvalidatePlot(true);
NMIN_MAX_ValueChanged(null, null);
NMIN.Enabled = true;
NMAX.Enabled = true;
TBInterpolationPolynomial.Text = "? Interpolation polynomial ?";
}
//Edit cell
private void DGVPoints_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
if (e.RowIndex >= 0 && e.ColumnIndex == 1)
{
double oldx_i = Convert.ToDouble(DGVPoints[e.ColumnIndex, e.RowIndex].Value);
double newx_i = Convert.ToDouble(e.FormattedValue);
bool can_or_not = true;
if (oldx_i != newx_i)
{
for (int i = 0; i < DGVPoints.RowCount; i++)
{
if (Convert.ToDouble(DGVPoints[1, i].Value) == newx_i)
{
MessageBox.Show("You can't change node to existing argument: " + newx_i, "Error");
e.Cancel = true;
can_or_not = false;
break;
}
}
if (can_or_not == true)
{
double y_iNew = (double)((KeyValuePair <string, Func <double, double> >)CBPolynomial.SelectedItem).Value.DynamicInvoke(newx_i);
this.DGVPoints[2, e.RowIndex].Value = y_iNew;
this.DGVPointsDict[e.RowIndex] = new KeyValuePair <double, double>(newx_i, y_iNew);
//edit plot
plotView1.Model.Series.Remove(scatterSeries);
scatterSeries.Points.RemoveAt(e.RowIndex);
scatterSeries.Points.Insert(e.RowIndex, new ScatterPoint(newx_i, y_iNew, 5, 1));
plotView1.Model.Series.Add(scatterSeries);
plotView1.Model.InvalidatePlot(true);
for (int i = 0; i < DGVPoints.RowCount - e.RowIndex; i++)
{
difDiv.RemoveAt(difDiv.Count - 1);
}
if (DGVPoints.RowCount > 0)
{
GenerateDifDiv(0, DGVPoints.RowCount - 1);
}
}
DGVPoints.InvalidateRow(e.RowIndex);
}
}
}