private void SaveElement1_Click(object sender, EventArgs e)
{
int index = AllElements1.SelectedIndex;
Charge point = new Charge();
point.point.x = Convert.ToDouble(FirstPointX1.Text);
point.point.y = Convert.ToDouble(FirstPointY1.Text);
point.q = Convert.ToDouble(ChargeT1.Text);
((GraphicElStatic)AllGraphics[LeftGraphIndex]).AllElements[index] = point;
AllElements1.Items.RemoveAt(index);
AllElements1.Items.Insert(index, "x = " + Convert.ToString(point.point.x) + " " + "y = " + Convert.ToString(point.point.y));
}
private void NewPoint1_Click(object sender, EventArgs e)
{
Charge point = new Charge();
point.point.x = Convert.ToDouble(FirstPointX1.Text);
point.point.y = Convert.ToDouble(FirstPointY1.Text);
point.q = Convert.ToDouble(ChargeT1.Text);
((GraphicElStatic)AllGraphics[LeftGraphIndex]).AllElements.Add(point);
Double x = point.point.x;
Double y = point.point.y;
AllElements1.Items.Add("x = " + x.ToString() + " " + "y = " + y.ToString());
}