/// <summary>
/// If conditions satisfies then remove equation from list and calls DeleteChart event.
/// </summary>
/// <param name="sender"></param>
/// <param name="ChoosedClass"></param>
private void Equation_DeleteEvent(object sender, EquationUI ChoosedClass)
{
if (!(sender is Button))
{
throw new ArgumentException();
}
Grid myGrid = new Grid();
UIElementCollection allElements = EquationListStack.Children;
foreach (var grid in allElements)
{
if (grid is Grid)
{
if ((grid as Grid).Children.Contains(sender as Button))
{
myGrid = grid as Grid;
}
}
}
if (EquationListStack.Children.Count < 2 || allElements.IndexOf(myGrid) == allElements.Count - 1)
{
MessageBox.Show("Cannot Delete This Field!", "Error");
}
else
{
EquationListStack.Children.Remove(myGrid);
Equations.Remove(ChoosedClass);
DeleteChart(this, ChoosedClass);
}
}
/// <summary>
/// Creats an equation and add it to equation list.
/// Adds grid of Equation to stack panel.
/// </summary>
public void AddEquation()
{
EquationUI newEquation = new EquationUI();
//TextBox Properties
newEquation.DataTextBox.TextChanged += OnTextChanged_AddEquation;
newEquation.DataTextBox.Background = AvailableColors[CurrentColorIndex];
//Event Properties
newEquation.Delete += Equation_DeleteEvent;
newEquation.Draw += NewEquation_Draw;
EquationListStack.Children.Add(newEquation.GetGrid());
Equations.Add(newEquation);
CurrentColorIndex = ++CurrentColorIndex >= AvailableColors.Count ? 0 : CurrentColorIndex;
}