private void buttonAdd_Click(object sender, System.EventArgs e)
{
// zadna funkce
if (textFce.Text.Length == 0)
{
MessageBox.Show("Write function y=f(x)", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if (numFrom.Value > numTo.Value)
{
MessageBox.Show("To value must be greather than From value", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if (numStep.Value > (numTo.Value - numFrom.Value) * 2)
{
MessageBox.Show("To value must be greather than From value", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if (numStep.Value == 0)
{
MessageBox.Show("Step value is ZERO. Why?", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
try
{
m_list = SLMath.SLCalculator.EvaluateFce(textFce.Text, (double)numFrom.Value, (double)numTo.Value, (double)numStep.Value);
m_list.Title = textFce.Text;
}
catch
{
m_list = null;
}
Close();
}
private void menuDeriv_Click(object sender, System.EventArgs e)
{
int idx = listBox.SelectedIndex;
if (idx != -1)
{
if (MessageBox.Show("Do you want detivate selected valuelist?", "Question?",
MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
SLMath.SLValueList val = SLMath.SLCalculator.DerivateFce((SLMath.SLValueList)listBox.Items[idx]);
val.Title = "Derivation:" + ((SLMath.SLValueList)listBox.Items[idx]).Title;
DataList.Add(val);
listBox.BeginUpdate();
listBox.Items.Add(val);
listBox.EndUpdate();
listBox.Invalidate();
}
}
}
private void listBox_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
SLMath.SLValueList list = (SLMath.SLValueList)listBox.Items[e.Index];
Rectangle rect = new Rectangle(e.Bounds.Left, e.Bounds.Top + 1, e.Bounds.Width - 2, e.Bounds.Height - 2);
Pen pen = Pens.Navy;
Brush brush;
brush = new SolidBrush(Color.Black);
e.Graphics.FillRectangle(new SolidBrush(Color.White), e.Bounds);
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
e.Graphics.DrawRectangle(pen, rect);
}
Pen lpen = new Pen(list.ColorLine, 2);
e.Graphics.DrawLine(lpen, rect.Left + 4, rect.Top + 8, rect.Left + 10, rect.Top + 8);
e.Graphics.DrawString(list.Title, listBox.Font, brush, new Point(rect.Left + 12, rect.Top + 1));
}
// Kresleni Bezierovy krivky
public void DrawBezier(Graphics g, SLMath.SLValueList ValueList)
{
}
