Demonstrate various aspects of Swing data transfer
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
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*/
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.TransferHandler;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* Demonstrate various aspects of Swing "data transfer".
*
* @author Ian Darwin, http://www.darwinsys.com
* @author Jonathan Fuerth, http://www.SQLPower.ca
*/
public class Transfer extends JFrame {
public static void main(String[] args) {
new Transfer().setVisible(true);
}
private JTextField tf;
private JLabel l;
private JComboBox propertyComboBox;
public Transfer() {
// Establish the GUI
Container cp = new Box(BoxLayout.X_AXIS);
setContentPane(cp);
JPanel firstPanel = new JPanel();
propertyComboBox = new JComboBox();
propertyComboBox.addItem("text");
propertyComboBox.addItem("font");
propertyComboBox.addItem("background");
propertyComboBox.addItem("foreground");
firstPanel.add(propertyComboBox);
cp.add(firstPanel);
cp.add(Box.createGlue());
tf = new JTextField("Hello");
tf.setForeground(Color.RED);
tf.setDragEnabled(true);
cp.add(tf);
cp.add(Box.createGlue());
l = new JLabel("Hello");
l.setBackground(Color.YELLOW);
cp.add(l);
cp.add(Box.createGlue());
JSlider stryder = new JSlider(SwingConstants.VERTICAL);
stryder.setMinimum(10);
stryder.setValue(14);
stryder.setMaximum(72);
stryder.setMajorTickSpacing(10);
stryder.setPaintTicks(true);
cp.add(stryder);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500, 300);
// Add Listeners and Converters
setMyTransferHandlers((String) propertyComboBox.getSelectedItem());
// Mousing in the Label starts a Drag.
MouseListener myDragListener = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
JComponent c = (JComponent) e.getSource();
TransferHandler handler = c.getTransferHandler();
handler.exportAsDrag(c, e, TransferHandler.COPY);
}
};
l.addMouseListener(myDragListener);
// Selecting in the ComboBox makes that the property that is xfered.
propertyComboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ce) {
JComboBox bx = (JComboBox) ce.getSource();
String prop = (String) bx.getSelectedItem();
setMyTransferHandlers(prop);
}
});
// Typing a word and pressing enter in the TextField tries
// to set that as the font name.
tf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
JTextField jtf = (JTextField) evt.getSource();
String fontName = jtf.getText();
Font font = new Font(fontName, Font.BOLD, 18);
tf.setFont(font);
}
});
// Setting the Slider sets that font into the textfield.
stryder.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent evt) {
JSlider sl = (JSlider) evt.getSource();
Font oldf = tf.getFont();
Font newf = oldf.deriveFont((float) sl.getValue());
tf.setFont(newf);
}
});
}
private void setMyTransferHandlers(String s) {
TransferHandler th = new TransferHandler(s);
tf.setTransferHandler(th);
l.setTransferHandler(th);
}
}
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