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<TITLE>Using a List JSpinner as a Cell Editor in a JTable Component
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
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<h3>
e959.
Using a List JSpinner as a Cell Editor in a JTable Component</h3>
If the possible values allowed in a column must be one from a small
fixed set of values, a spinner might be appropriate as the cell editor
for that column. By using a list spinner, it is impossible for the
user to input an invalid value.
<pre>
JTable table = new JTable();
DefaultTableModel model = (DefaultTableModel)table.getModel();
// Add some columns
model.addColumn(<font color="#0066ff"><i>"A"</i></font>, <font color="#0066ff"><i>new Object[]{"item1"}</i></font>);
model.addColumn(<font color="#0066ff"><i>"B"</i></font>, <font color="#0066ff"><i>new Object[]{"item2"}</i></font>);
// These are the spinner values
String[] values = new String[]{<font color="#0066ff"><i>"item1"</i></font>, <font color="#0066ff"><i>"item2"</i></font>, <font color="#0066ff"><i>"item3"</i></font>};
// Set the spinner editor on the 1st visible column
int vColIndex = <font color="#0066ff"><i>0</i></font>;
TableColumn col = table.getColumnModel().getColumn(vColIndex);
col.setCellEditor(new SpinnerEditor(values));
// If you want to make the cell appear like a spinner in its
// non-editing state, also set the spinner renderer
col.setCellRenderer(new SpinnerRenderer(values));
public class SpinnerEditor extends AbstractCellEditor
implements TableCellEditor {
final JSpinner spinner = new JSpinner();
// Initializes the spinner.
public SpinnerEditor(String[] items) {
spinner.setModel(new SpinnerListModel(java.util.Arrays.asList(items)));
}
// Prepares the spinner component and returns it.
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
spinner.setValue(value);
return spinner;
}
// Enables the editor only for double-clicks.
public boolean isCellEditable(EventObject evt) {
if (evt instanceof MouseEvent) {
return ((MouseEvent)evt).getClickCount() >= 2;
}
return true;
}
// Returns the spinners current value.
public Object getCellEditorValue() {
return spinner.getValue();
}
}
</pre>
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Related Examples
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e952. <a class="eglink" href="CustEdit.html?l=rel">
Creating a Custom Table Cell Editor in a JTable Component
</a>
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e953. <a class="eglink" href="ValidateValue.html?l=rel">
Preventing Invalid Values in a Cell in a JTable Component
</a>
<br>
e954. <a class="eglink" href="CustEditClick.html?l=rel">
Setting the Activation Click Count for a Table Cell Editor in a JTable Component
</a>
<br>
e955. <a class="eglink" href="StopEdit.html?l=rel">
Programmatically Starting and Stopping Cell Editing in a JTable Component
</a>
<br>
e956. <a class="eglink" href="AnchorEdit.html?l=rel">
Creating a Text Field That Mirrors the Value in the Anchor Cell in a JTable Component
</a>
<br>
e957. <a class="eglink" href="NoEdit.html?l=rel">
Disabling User Edits in a JTable Component
</a>
<br>
e958. <a class="eglink" href="ComboBox.html?l=rel">
Using a JComboBox in a Cell in a JTable Component
</a>
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See also:
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Cells">
Cells
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Column%20Heads">
Column Heads
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Columns">
Columns
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Events">
Events
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Layout">
Layout
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Rows">
Rows
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Scrolling">
Scrolling
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Selection">
Selection
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Sorting">
Sorting
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Table%20Model">
Table Model
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Tool%20Tips">
Tool Tips
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