taverna-xpath-activity-ui/src/main/java/net/sf/taverna/t2/activities/xpath/ui/config/TwoFieldQueryPanel.java

package net.sf.taverna.t2.activities.xpath.ui.config;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 * Auxiliary class that creates a JPanel with two labels and two text fields.
 *
 * It can be used to be placed into a dialog made by JOptionPane to get two
 * input values, not just one.
 *
 * @author Sergejs Aleksejevs
 */
public class TwoFieldQueryPanel extends JPanel {
	private JTextField tfFirstValue;
	private JTextField tfSecondValue;

	public TwoFieldQueryPanel(String firstFieldName, String secondFieldName) {
		this(null, firstFieldName, null, secondFieldName, null);
	}

	public TwoFieldQueryPanel(String message, String firstFieldName,
			String secondFieldName) {
		this(message, firstFieldName, null, secondFieldName, null);
	}

	public TwoFieldQueryPanel(String firstFieldName,
			String firstFieldDefaultValue, String secondFieldName,
			String secondFieldDefaultValue) {
		this(null, firstFieldName, firstFieldDefaultValue, secondFieldName,
				secondFieldDefaultValue);
	}

	public TwoFieldQueryPanel(String message, String firstFieldName,
			String firstFieldDefaultValue, String secondFieldName,
			String secondFieldDefaultValue) {
		super();
		this.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));

		this.setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();

		c.gridx = 0;
		c.gridy = 0;
		c.weightx = 0;
		c.fill = GridBagConstraints.HORIZONTAL;
		c.anchor = GridBagConstraints.WEST;
		c.insets = new Insets(3, 5, 3, 5);

		if (message != null && message.length() > 0) {
			c.gridwidth = 2;
			c.insets = new Insets(5, 5, 15, 5);
			this.add(new JLabel(message), c);

			c.gridwidth = 1;
			c.gridx = 0;
			c.gridy++;
			c.insets = new Insets(3, 5, 3, 5);
		}

		this.add(new JLabel(firstFieldName), c);

		c.gridx++;
		c.weightx = 1.0;
		tfFirstValue = new JTextField(20);
		if (firstFieldDefaultValue != null) {
			tfFirstValue.setText(firstFieldDefaultValue);
		}
		tfFirstValue.selectAll();
		tfFirstValue.requestFocusInWindow();
		this.add(tfFirstValue, c);

		c.gridx = 0;
		c.gridy++;
		c.weightx = 0;
		this.add(new JLabel(secondFieldName), c);

		c.gridx++;
		c.weightx = 1.0;
		tfSecondValue = new JTextField(20);
		if (secondFieldDefaultValue != null) {
			tfSecondValue.setText(secondFieldDefaultValue);
		}
		tfSecondValue.selectAll();
		this.add(tfSecondValue, c);
	}

	/**
	 * @return Trimmed value from the first text field. Guaranteed to be
	 *         non-null.
	 */
	public String getFirstValue() {
		return (tfFirstValue.getText().trim());
	}

	/**
	 * @return Trimmed value from the second text field. Guaranteed to be
	 *         non-null.
	 */
	public String getSecondValue() {
		return (tfSecondValue.getText().trim());
	}

}