public void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
// if property name is equal to text
if (e.PropertyName == "Text")
{
InstanciateCell tCell = sender as InstanciateCell;
DeleteDeps(tCell.Name);
// update cell value to text
//tCell.SetVal(tCell.Text);
// if it starts with an equal sign
if (tCell.Text != "" && tCell.Text[0] == '=' && tCell.Text.Length > 1)
{
ExpTree exp = new ExpTree(tCell.Text.Substring(1));
MakeDeps(tCell.Name, exp.getVars());
}
EvalCell(sender as Cell);
}
else if (e.PropertyName == "BackColor")
{
CellPropertyChanged(sender, new PropertyChangedEventArgs("BackColor"));
}
}
private void EvalCell(Cell cell)
{
InstanciateCell mCell = cell as InstanciateCell;
// if the string is empty
if (string.IsNullOrEmpty(mCell.Text))
{
mCell.SetVal("");
CellPropertyChanged(cell, new PropertyChangedEventArgs("Value"));
}
// if it an equation
else if (mCell.Text[0] == '=' && mCell.Text.Length > 1)
{
// remove =
string exp = mCell.Text.Substring(1);
SpreadsheetEngine.ExpTree mExp = new SpreadsheetEngine.ExpTree(exp);
string[] arrayVars = mExp.getVars();
foreach (string v in arrayVars)
{
if (GetCell(v) == null)
{
mCell.SetVal("Bad Ref");
CellPropertyChanged(cell, new PropertyChangedEventArgs("Value"));
break;
}
// attempt at setting variable to value
SetExpVar(mExp, v);
}
mCell.SetVal(mExp.Eval().ToString());
CellPropertyChanged(cell, new PropertyChangedEventArgs("Value"));
}
// not an expression
else
{
mCell.SetVal(mCell.Text);
CellPropertyChanged(cell, new PropertyChangedEventArgs("Value"));
}
// evaluate dependencies
if (depDict.ContainsKey(mCell.Name))
{
foreach (string name in depDict[mCell.Name])
{
Eval(name);
}
}
}
// spreadsheet constructor
public Spreadsheet(int rows, int cols)
{
cells = new Cell[rows, cols];
// loop through and create instantiation of cell
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
cells[i, j] = new InstanciateCell(i, j);
cells[i, j].PropertyChanged += OnPropertyChanged;
}
}
}
