/// <summary>
/// Name:DetermineCellValue
/// Description:Determines if the text written in the cell is a formula or if its just a text
/// </summary>
/// <param name="cell">the cell that you inputed text in</param>
private void DetermineCellValue(Cell cell)
{
BaseCell determineCell = cell as BaseCell;
string cellName = determineCell.ColIndex.ToString() + determineCell.RowIndex.ToString();
if (determineCell.Text[0] == '=' && determineCell.Text.Length > 1)
{
double varValue;
string text = determineCell.Text.Substring(1);
ExpressionTree determineTree = new ExpressionTree(text);
string[] variables = determineTree.GetVariable();
foreach (string name in variables)
{
Cell varCell = this.GetCell(name);
if (name == cellName)
{
determineCell.SetVal("ERROR: REFRENCING SELF");
this.CellPropertyChanged(cell, new PropertyChangedEventArgs("Value Property Changed"));
return;
}
else if (double.TryParse(varCell.Value, out varValue))
{
determineTree.SetVariable(name, varValue);
}
else
{
determineTree.SetVariable(name, 0);
}
}
determineCell.SetVal(determineTree.Evaluate().ToString());
this.CellPropertyChanged(cell, new PropertyChangedEventArgs("Value Property Changed"));
}
else if (!string.IsNullOrWhiteSpace(determineCell.Text))
{
determineCell.SetVal(determineCell.Text);
this.CellPropertyChanged(cell, new PropertyChangedEventArgs("Value Property Changed"));
}
else
{
determineCell.SetVal(string.Empty);
this.CellPropertyChanged(cell, new PropertyChangedEventArgs("Value Property Changed"));
}
if (this.refrenceDictionary.ContainsKey(cellName))
{
foreach (string cells in this.refrenceDictionary[cellName])
{
this.DetermineCellValue(this.GetCell(cells));
}
}
}
public Spreadsheet(int color, int row = 50, int col = 26)
{
cellCollection = new Cell[row, col];
for (int r = 0; r < row; r++)
{
for (int c = 0; c < col; c++)
{
cellCollection[r, c] = new Cell(color, r, c);
cellCollection[r, c].PropertyChanged += OnPropertyChangedEventHandler;
}
}
tree = new ExpressionTree(ref cellCollection);
}
/// <summary>
/// Name:PropertyChanged
/// Description:property changed function checks if the cell is = or not and if its = 'it knows that its pointing to something else
/// </summary>
/// <param name="sender">object( the cell)</param>
/// <param name="e">event argument</param>
public void PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "Text Property Changed")
{
BaseCell baseCell = sender as BaseCell;
string name = baseCell.ColIndex.ToString() + baseCell.RowIndex.ToString();
this.DeleteRefrence(name);
if (baseCell.Text != string.Empty && baseCell.Text[0] == '=' && baseCell.Text.Length > 1)
{
ExpressionTree tree = new ExpressionTree(baseCell.Text.Substring(1));
this.SetRefrence(name, tree.GetVariable());
}
this.DetermineCellValue(sender as Cell);
}
}