@Override
public void update(Cell changed) {
if (!spreadSheet.getModified().contains(this)) {
spreadSheet.getModified().add(this);
setValue(new vInvalid(expression));
for (Cell cell : referThis) cell.update(this);
}
}
public void setExpression(String expression) {
if (expression.startsWith("=")) expression = expression.replaceFirst("=", "");
for (CellImpl cell : thisRefer) {
cell.referThis.remove(this);
}
this.thisRefer.clear();
this.expression = expression;
setValue(new vInvalid(expression));
spreadSheet.getModified().add(this);
for (Location location : SpreadsheetImpl.getReferredLocation(expression)) {
CellImpl cell = spreadSheet.InsertCellIfNotExistAt(location);
thisRefer.add(cell);
cell.referThis.add(this);
}
for (Cell cell : referThis) cell.update(this);
}