multivaluetextfield.java

CRMS客户关系管理系统(JAVA版）,这是一个客户关系管理系统。

package crms.ui;


import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.awt.event.*;

public class MultiValueTextField extends JPanel {
	protected JComboBox combo = new JComboBox();
	protected JButton delButton = new JButton("X");

	ArrayList values = null;

	public MultiValueTextField() {
		setLayout(new BorderLayout());


		combo.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JComboBox cb = (JComboBox)e.getSource();
				String command = e.getActionCommand();
				if (command.compareToIgnoreCase("comboBoxEdited") != 0) return;

				// new item
				if (cb.getSelectedIndex() == -1) {
					String selected = (String)cb.getSelectedItem();

					if (selected.length() == 0) return;

					if (values == null) values = new ArrayList();
					values.add(selected);
					cb.addItem(selected);

					cb.setSelectedItem("");
				}
			}
		} );

		delButton.addActionListener( new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int index = combo.getSelectedIndex();
				if (index >= 0) {
					String value = (String)combo.getSelectedItem();
					combo.removeItem(value);
					values.remove(values.indexOf(value));
				}
				if (values == null) return;
				if (values.size() > 0) {
					combo.setSelectedItem(values.get(0));
				} else {
					combo.setSelectedItem("");
				}
			}
		} ); 

		delButton.setToolTipText("Remove the currently selected value for the field.");

		add(combo, BorderLayout.CENTER);
		add(delButton, BorderLayout.EAST);

		// default to editable as we *are* a text field
		setEditable(true);
	}

	public void addActionListener(ActionListener listener) {
		combo.addActionListener(listener);
	}

	public void setValues(ArrayList values) {
		this.values = values;

		combo.removeAllItems();

		if (values == null) return;

		for (int i = 0; i < values.size(); i++) {
			combo.addItem(values.get(i));
		}
	}

	public ArrayList getValues() {
		return this.values;
	}

	public void setEditable(boolean editable) {
		// always want to use the editor text component
		combo.setEditable(true);

		// control the text component's editable status	
		((JTextField)combo.getEditor().getEditorComponent()).setEditable(editable);
		delButton.setVisible(editable);
	
		String tip = "";
		if (values != null && values.size() > 0) tip += values.size() + " items. ";
		if (editable == true) tip += "Type in a value and press return to add to list.";
		combo.setToolTipText(tip);
	}

	public void setEnabled(boolean enabled) {
		combo.setEnabled(enabled);
		delButton.setEnabled(enabled);
	}

	public void setBackground(Color color) {
		super.setBackground(color);

		if (combo == null) return;
		((JTextField)combo.getEditor().getEditorComponent()).setBackground(color);
	}
	
}