public SwingDnDFrame() {
setTitle("SwingDnDTest");
JTabbedPane tabbedPane = new JTabbedPane();
JList list = SampleComponents.list();
tabbedPane.addTab("List", list);
JTable table = SampleComponents.table();
tabbedPane.addTab("Table", table);
JTree tree = SampleComponents.tree();
tabbedPane.addTab("Tree", tree);
JFileChooser fileChooser = new JFileChooser();
tabbedPane.addTab("File Chooser", fileChooser);
JColorChooser colorChooser = new JColorChooser();
tabbedPane.addTab("Color Chooser", colorChooser);
final JTextArea textArea = new JTextArea(4, 40);
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setBorder(new TitledBorder(new EtchedBorder(), "Drag text here"));
JTextField textField = new JTextField("Drag color here");
textField.setTransferHandler(new TransferHandler("background"));
tabbedPane.addChangeListener(
new ChangeListener() {
public void stateChanged(ChangeEvent e) {
textArea.setText("");
}
});
tree.setDragEnabled(true);
table.setDragEnabled(true);
list.setDragEnabled(true);
fileChooser.setDragEnabled(true);
colorChooser.setDragEnabled(true);
textField.setDragEnabled(true);
add(tabbedPane, BorderLayout.NORTH);
add(scrollPane, BorderLayout.CENTER);
add(textField, BorderLayout.SOUTH);
pack();
}
/**
* Handle action events coming from the buttons.
*
* @param evt, the associated ActionEvent.
*/
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source instanceof JButton) {
if (source == pbSave) {
chosen = tcc.getColor();
onCancel();
} else {
onCancel();
}
}
}
public ColorChooserDemo() {
super(new BorderLayout());
// 设置一个标签，做广告的。也用来显示用户选择的颜色。
banner = new JLabel("欢迎使用颜色选择器！", JLabel.CENTER);
banner.setForeground(Color.yellow);
banner.setBackground(Color.blue);
banner.setOpaque(true);
banner.setFont(new Font("SansSerif", Font.BOLD, 24));
banner.setPreferredSize(new Dimension(100, 65));
JPanel bannerPanel = new JPanel(new BorderLayout());
bannerPanel.add(banner, BorderLayout.CENTER);
bannerPanel.setBorder(BorderFactory.createTitledBorder("广告"));
// 设置选择颜色选择器
tcc = new JColorChooser(banner.getForeground()); // 设置初始颜色
tcc.getSelectionModel().addChangeListener(this); // 给所有模式添加监听
tcc.setBorder(BorderFactory.createTitledBorder("选择颜色"));
add(bannerPanel, BorderLayout.CENTER);
add(tcc, BorderLayout.PAGE_END);
}
/**
* <br>
* 方法说明：事件监听。用户选择颜色触发 <br>
* 输入参数：ChangeEvent e 用户选择事件 <br>
* 返回类型：
*/
public void stateChanged(ChangeEvent e) {
Color newColor = tcc.getColor(); // 获取用户选择的颜色
banner.setForeground(newColor);
}
/** Set the colour the user has chosen. */
public void setColour(Color color) {
tcc.setColor(color);
}