kern/src/de/memtext/buttons/ButtonGroupPanel.java

package de.memtext.buttons;

import java.util.Enumeration;

import javax.swing.ButtonGroup;
import javax.swing.ButtonModel;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

public class ButtonGroupPanel extends JPanel {
	ButtonGroup group = new ButtonGroup();
	ButtonWithValue hiddenNoSelectionButton = new ButtonWithValue("", null);

	public ButtonGroupPanel() {
		this(null);
	}
	public ButtonGroupPanel(String header) {
		super();
		if (header != null)
			this.add(new JLabel(header));
			
		hiddenNoSelectionButton.setVisible(false);
		hiddenNoSelectionButton.setSelected(true);
		group.add(hiddenNoSelectionButton);
	}
	public void addCategory(String label, Object value,boolean isSelected) {
		ButtonWithValue b = new ButtonWithValue(label, value);
		this.add(b);
		group.add(b);
		b.setSelected(isSelected);
	}
	public void addCategory(String label, Object value) {
		addCategory(label, value,false);
		}
	
	public void addCategory(String label, int i) {
			addCategory(label, new Integer(i));
		}
	public void addCategory(String label, int i,boolean isSelected) {
				addCategory(label, new Integer(i),isSelected);
			}
	/**
	 * If you pass null as an argument no element will be selected 
	 * @param label
	 */
	public void setSelected(String label) {
		if (label == null)
			hiddenNoSelectionButton.setSelected(true);
		else
			for (Enumeration en = group.getElements();
				en.hasMoreElements();
				) {
				ButtonWithValue b = (ButtonWithValue) en.nextElement();
				if (b.getText().equals(label)) {
									b.doClick();
										break;
				}
			}
	}

	public Object getSelectedValue() {
		ButtonWithValue selectedButton=null;
		for (Enumeration en = group.getElements();
			en.hasMoreElements();
			) {
			ButtonWithValue b = (ButtonWithValue) en.nextElement();
			if (b.isSelected()) {
				selectedButton=b;
				break;
			}
		}
		return selectedButton.getValue();
	}
	class ButtonWithValue extends JRadioButton {
		private Object value;
		ButtonWithValue(String label, Object value) {
			super(label);
			this.value = value;
		}
		Object getValue() {
			return value;
		}

	}
	
}

//Created on 17.02.2004 at 13:40:06