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7.6

JComboBox cell renderer/editor updates other JComboBox in same JTable

Asked by jolly_rog in Java AWT & Swing, Java Editors & IDEs

Tags: Java, Swing

I'm stuck. I have a JTable that holds a JComboBox which is populated depending on the value in another cell (plain) in the same row. Everything displays correctly, with the correct values in each combo box. The problem is when I make a selection on a combo box, any previous combo box selections revert to the default state. I know I'm stomping on either my combo box instance or the Vector I'm populating it with in either my cell editor or cell renderer class. I'm also fairly certain I'm implementing too many instances of JComboBox.

Thanks in advance....Start Free Trial

         
           
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             import java.util.Vector;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
 
public class ComboBoxTable extends JTable {
    
    public ComboBoxTable(TableModel tm) {
        super(tm);
        tableModel = (ComboBoxOutputTableModel)tm;
    }
    
    ComboBoxOutputTableModel tableModel;
    
    Vector valuesVector = null;
    
    
    public TableCellRenderer getCellRenderer(int row, int column){
        if(column == 1){
            setValuesVector(row,column);
            MyComboBoxRenderer renderer = new MyComboBoxRenderer(valuesVector);
            getColumnModel().getColumn(1).setCellRenderer(renderer);
            return renderer;
        }
        else return super.getCellRenderer(row, column);
    }
 
    public TableCellEditor getCellEditor(int row, int column)
    {       
        if (column == 1){           
            
            MyComboBoxEditor editor = new InegQueueComboBoxEditor(valuesVector);
            return editor;
        }
        else return super.getCellEditor(row, column);
    }
    
    /**
     * Gets the collection from the table model data for the current row and populates 
     * the Vector that will be set to a comboBox with it
     * tableModel.getData() returns Object[int][String[]]
     */
    public void setValuesVector(int row, int column){
        Object[] modelRow = tableModel.getData()[row];   
        this.valuesVector = new Vector((Vector)modelRow[column]);
    }
 
}
 
public class MyComboBoxRenderer implements TableCellRenderer {
   
    public MyComboBoxRenderer(Vector v){
 
    }
 
    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        JComboBox comboBox = null;
               
        if(value == null){
            comboBox = new JComboBox();
        }else{
            Vector vector = (value instanceof Vector)?(Vector)value:new Vector();
            comboBox = new EiiComboBox(vector);
            comboBox.setFont(LookAndFeelConstants.getLabelFont());
        }
        if (isSelected) {
            comboBox.setForeground(table.getSelectionForeground());
            comboBox.setBackground(table.getSelectionBackground());
            
        } else {
            comboBox.setForeground(table.getForeground());
            comboBox.setBackground(table.getBackground());
        }
        return comboBox;
    }
    
}
 
 
public class MyComboBoxEditor extends AbstractCellEditor implements TableCellEditor {
 
    private Component comp = null;
    private int r = 0;
    private int c = 0;
   
    public MyComboBoxEditor(Vector items) {
        super();
    }
    
 
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
        Component com = null;
        r = row;
        c = column;
        JComboBox comboBox;
        
        if(value == null || value.toString().length() == 0) com = new JTextField("");
        else if(value instanceof Vector){
            comboBox = new JComboBox();
              if(comboBox.getModel().getSize() > 0){
                    // clear it...
                  comboBox.removeAllItems();
              }
              comboBox.setModel(new DefaultComboBoxModel((Vector)value));
              
              comboBox.addItemListener(new ItemListener(){
                public void itemStateChanged(ItemEvent e) {
                
                	//nothing implemented here yet
                }                  
              });
 
              com = comboBox;
              
        }else {
        
            comboBox = new JComboBox();
              if(comboBox.getModel().getSize() > 0){
                    // clear it...
                  comboBox.removeAllItems();
              }
              comboBox.addItem(value);
              com = comboBox;
        }
        comp = com;
        return com;
    }
 
	//inherited
	
    public Object getCellEditorValue() {
        return null;
    }
}

           
         

Keywords: JComboBox cell renderer/editor updat…

	Title
1	Swing JTable Cell JComboBox
2	How can I provide different items in a J…
3	JComboBox in JTable
4	JComboBox in JTable
5	JTable row coloring
6	array of JComboBox into Jtable

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20080924-EE-VQP-38 / EE_QW_2_20070628

JComboBox cell renderer/editor updates other JComboBox in same JTable

Asked by jolly_rog in Java AWT & Swing, Java Editors & IDEs

Tags: Java, Swing

About this solution