/**
* This method exists to make it easier to see when and where classes are changing the formula
* This also serves another purpose by adding spaces and formatting when needed, something that
* the normal setFormula() method cannot do.
*
* @param toAdd the information to add to the Formula : either operator or inputs
* @exception SyntaxErrorException: this exception is thrown if the method is called trying to add
* an input where the last entry in the formula is an input already, or an operator following
* another operator. it also throws the exception if the first operator added is * or / and no
* inputs have been entered before. those are all errors that are dealt with in the AMT code,
* and the method should never be called in those instances.
*/
public void addToFormula(String toAdd) throws SyntaxErrorException {
if (toAdd.length() == 1) {
addToFormula(toAdd.charAt(0));
return;
}
// if the cell to add the operator in does not exist yet, create it
if ((opList == null) || (nextEntry >= opList.size())) opList.add(new TreeCell());
TreeCell currentCell = opList.get(nextEntry); // get the current cell that we will be using
try {
currentCell.addInputInCell(toAdd);
if ((currentCell.getstatusCell() == TreeCell.RIGHT_COMPLETED)
&& ((currentCell.getcellValue().length() > 1))) nextEntry++;
if ((currentCell.getstatusCell() == TreeCell.RIGHT_COMPLETED)
&& ((currentCell.getcellValue().length() == 1))
&& (currentCell.getrightSon() != null)) nextEntry++;
this.addLeaveTotal();
} catch (SyntaxErrorException e) {
throw e;
}
}
