How can I create a checkbox in a TableViewer of JFace?

Question

I have created a tableViewer with two columns and I want to make one of them a checkbox. To do that I have created a CheckBoxCellEditor, but I don´t know why it isn´t working.

The column called tableName displays it´s values OK.

The column specification is the following.

    String[] COLUMN_HEADINGS = {"Select", "Table name"};

    TableColumnLayout tableLayout = new TableColumnLayout();
    parent.setLayout(tableLayout);

    //Set what would display each column
    TableViewerColumn selectCheckBox = createTableViewerColumn(COLUMN_HEADINGS[0], 0);
    selectCheckBox.getColumn().setResizable(false);
    selectCheckBox.setLabelProvider(new ColumnLabelProvider(){
         @Override
         public String getText(Object element) {
                 return null;
         }
    });

    //Set what would display each column
    TableViewerColumn tableName = createTableViewerColumn(COLUMN_HEADINGS[1], 1);
    tableName.getColumn().setResizable(false);
    tableName.setLabelProvider(new ColumnLabelProvider(){
        public String getText(Object element) {
            if(element instanceof TableMetaData && element != null)
                return ((TableMetaData)element).getName();
            return super.getText(element);
        }
    });

    //Set the dimensions of each column
    tableLayout.setColumnData(selectCheckBox.getColumn(), new ColumnWeightData(10));
    tableLayout.setColumnData(tableName.getColumn(), new ColumnWeightData(90));

    //Set column type (checkbox)
    selectCheckBox.setEditingSupport(new ResourcesConfigCheckEditingSupport(this));

And the EditingSupport is the following:

public class ResourcesConfigCheckEditingSupport extends EditingSupport{
    private CheckboxCellEditor cellEditor;


    public ResourcesConfigCheckEditingSupport(ColumnViewer viewer) {
        super(viewer);
        // TODO Auto-generated constructor stub
        cellEditor = new CheckboxCellEditor(null, SWT.CHECK | SWT.READ_ONLY);
    }

    @Override
    protected CellEditor getCellEditor(Object element) {
        // TODO Auto-generated method stub
        return cellEditor;
    }

    @Override
    protected boolean canEdit(Object element) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    protected Object getValue(Object element) {
        // TODO Auto-generated method stub
        return ((TableMetaData) element).getIsSelected();
    }

    @Override
    protected void setValue(Object element, Object value) {
        // TODO Auto-generated method stub
        ((TableMetaData) element).setIsSelected(Boolean.valueOf((boolean) value));
        getViewer().update(element, null);

    }
}

The TableMetaData object decides if the Checkbox is going to be selected or not. How can I fix my code in order to make it work?

Thank you.

Answer 1

Vogella has a complete example which you will find here: http://www.vogella.com/tutorials/EclipseJFaceTableAdvanced/article.html

In section 4 a CheckboxCellEditor is used. It might help you.