package com.wf;
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
import java.awt.*;
class PaintUserData
{
public static Color _color = Color.BLACK;
}
class ProjectTree extends JTree implements TreeSelectionListener
{
private JPanel _panel;
public ProjectTree(JPanel panel) {
addTreeSelectionListener(this);
_panel = panel;
}
@Override
public void valueChanged(TreeSelectionEvent e) {
TreePath path = e.getNewLeadSelectionPath();
DefaultMutableTreeNode node = (DefaultMutableTreeNode)path.getLastPathComponent();
if (node.getUserObject().equals("red"))
{
PaintUserData._color = Color.red;
}
else if (node.getUserObject().equals("blue"))
{
PaintUserData._color = Color.blue;
}
else if (node.getUserObject().equals("yellow"))
{
PaintUserData._color = Color.yellow;
}
else if (node.getUserObject().equals("violet"))
{
PaintUserData._color = Color.CYAN;
}
else
{
PaintUserData._color = Color.black;
}
_panel.repaint();
}
}
class PaintPanel extends JPanel
{
public PaintPanel() {
}
@Override
public void paint(Graphics g) {
super.paint(g);
g.setColor(PaintUserData._color);
g.drawLine(0, 0, 400, 400);
}
}
class MainWidget extends JComponent
{
private GridBagConstraints _gbScrollPane;
private GridBagConstraints _gbPaintPanel;
private GridBagLayout _layout;
private JScrollPane _scrollPane;
private ProjectTree _projectTree;
private PaintPanel _paintPanel;
public MainWidget() {
_gbScrollPane = new GridBagConstraints();
_gbPaintPanel = new GridBagConstraints();
_gbScrollPane.weightx = 0.1;
_gbScrollPane.weighty = 1;
_gbScrollPane.gridx = 0;
_gbScrollPane.gridy = 0;
_gbScrollPane.fill = GridBagConstraints.BOTH;
_gbPaintPanel.weightx = 0.9;
_gbPaintPanel.weighty = 0;
_gbPaintPanel.gridx = 1;
_gbPaintPanel.gridy = 0;
_gbPaintPanel.fill = GridBagConstraints.BOTH;
_layout = new GridBagLayout();
setLayout(_layout);
_scrollPane = new JScrollPane();
_paintPanel = new PaintPanel();
_projectTree = new ProjectTree(_paintPanel);
_scrollPane.getViewport().add(_projectTree);
add(_scrollPane, _gbScrollPane);
add(_paintPanel, _gbPaintPanel);
}
}
public class Test01 extends JFrame
{
private MainWidget _mainWidget;
public Test01() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
_mainWidget = new MainWidget();
getContentPane().add(_mainWidget);
}
public static void main(String[] args) throws Exception{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Test01 f = new Test01();
f.setSize(1024, 800);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
}
}
