Java SE (Java Platform, Standard Edition)

Hi!



I have a table with two rows the left uneditable and the right editable.

The right side render different values for each row-cell so the content of the cells differs between ints,strings booleans and so forth.

Here comes my problem. I want my boolean values to be rendered as a JComboBox instead of the default checkbox.

I have written a renderer and editor for this purpose which works to a certain extent. When you first enter the application the cell is rendered correct(JComboBox) but as you try to edit the field it re-renders it to a String. Anyone who could help me? Because i am stuck and can't seem to get myself out of this little hole i dug for myself.

First i override the DefaultTableModel with the following changes:

String values[] = {"true","false"};

public TableCellRenderer getCellRenderer(int row, int column) {
        editingClass = null;
        int modelColumn = convertColumnIndexToModel(column);
        System.out.println("getCellRenderer");
        if (modelColumn == 1) {
            if (getModel().getValueAt(row, modelColumn) == null) {
                System.out.println("null at cellRenderer");
                System.out.println(row + " : " + column);
            }

            Class rowClass = getModel().getValueAt(row, modelColumn).getClass();
            if (getModel().getValueAt(row, modelColumn) instanceof Number) {
                return new NumberRenderer();
            } else if (getModel().getValueAt(row, modelColumn) instanceof String) {
                DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
                renderer.setHorizontalAlignment(JLabel.RIGHT);
                return renderer;
            }else if (getModel().getValueAt(row, modelColumn) instanceof Boolean) {
                return new BolRenderer(values);
            }

            return getDefaultRenderer(rowClass);
        } else {
            return super.getCellRenderer(row, column);
        }
    }

    public TableCellEditor getCellEditor(int row, int column) {
        editingClass = null;
        int modelColumn = convertColumnIndexToModel(column);
        System.out.println("getCellEditor");
        if (modelColumn == 1) {       
            
            if(getModel().getValueAt(row, modelColumn) instanceof Boolean)
                return new BolEditor(values);
            else
                editingClass = getModel().getValueAt(row, modelColumn).getClass();
            
            return getDefaultEditor(editingClass);
        } else {
            return super.getCellEditor(row, column);
        }
    }


    public Class getColumnClass(int column) {
        System.out.println("getColumnClass");
        return editingClass != null ? editingClass : super.getColumnClass(column);
    }

The Boleditor

public class BolEditor extends DefaultCellEditor{
        public BolEditor(String[] items) {
            super(new JComboBox(items));
        }
}

BolRenderer

public class BolRenderer extends JComboBox implements TableCellRenderer {
    
     public BolRenderer(String[] values){
        super(values);
    }
        
    public Component getTableCellRendererComponent(JTable table, Object value,
                                                    boolean isSelected,
                                                    boolean hasFocus,
                                                    int row, int column) {
        if(Boolean.TRUE.equals(value)){
            /*this.setSelectedItem(value);
              this.setSelectedIndex(0);
             */
        }else{
            /*
             this.setSelectedItem(value);
             this.setSelectedIndex(1);
             */
        }

        return this;
    }
}

As I see it, it's my inability to write a proper renderer and editor which is the real problem so if someone could help me it would be really great! Thanks!