Java Reference
In-Depth Information
method would take the column and row indexes into account and evaluate whether or not a
cell was editable.
Listing 8-15.
The TableModel's isCellEditable Method
public boolean isCellEditable (int row, int column) {
return false;
}
■
Note
Unlike the other methods shown so far,
isCellEditable
is already implemented in
AbstractTableModel
. As it happens, the
AbstractTableModel
implementation provides the same func-
tionality as our overridden method. We therefore did not need to override this method; however, doing so
makes it easier for you to experiment with this method.
Finally, our
DVDTableModel
class contains two methods beyond those required by the
TableModel
interface. These extra methods are included as a matter of convenience. As men-
tioned earlier in this chapter, the
DVD
object, which is used by the rest of the system, is not the
same Model that is used by the View. In this case, the View object is a
JTable
and the Model
object is the
DVDTableModel
. The
GUIController
class must go through the process of convert-
ing a
DVD
object (or a collection of
DVD
objects) to a
DVDTableModel
object. To make this task
easier, the
DVDTableModel
implements the two methods in Listing 8-16.
Listing 8-16.
Convenience Methods Within the DVDTableModel Class
public void addDVDRecord (String upc, String name, String director,
String leadActor, String supportingActor,
String composer, int numberOfCopies) {
String [] temp = {upc, name, director, leadActor, supportingActor,
composer, Integer.toString(numberOfCopies)};
this.dvdRecords.add(temp);
}
public void addDVDRecord (DVD dvd) {
addDVDRecord(dvd.getUPC(), dvd.getName(), dvd.getDirector(),
dvd.getLeadActor(), dvd.getSupportingActor(),
dvd.getComposer(), dvd.getCopy());
}
The methods in Listing 8-16 take in a
DVD
object (or the equivalent data) and append the
new row to the data set encapsulated within the
DVDTableModel
. The first method receives the
data contained in a
DVD
object as parts, whereas the second method simply requires a
DVD
object. In order to add a
DVD
to the
DVDTableModel
, the
GUIController
will simply call one of
these two methods, thus avoiding a conversion process from within the
GUIController
each
time an alteration to the data view occurs.
