ITEEDU

10-5:改变JTree的外观:

你可以使用JComponent所提供的putClientProperty(Object key,Object value)方法来设置java默认的JTree外观，设置方式共有 3种:

• tree.putClientProperty("JTree.lineStyle","None"):java默认值。
• tree.putClientProperty("JTree.lineStyle","Horizontal"):使JTree的文件夹间具有水平分隔线。
• tree.putClientProperty("JTree.lineStyle","Angled"):使JTree具有类似Windows文件管理器的直角连接线。 具体怎样做，可看上例.

10-6:更换JTree节点图案:

JTree利用TreeCellRenderer界面来运行绘制节点的工作，同样的，你不需要直接支实作这个界面所定义的方法，因为java本身提 供一个已经实作好的类来给我们使用，此类就是DefaultTreeCellRenderer,你可以在javax.swing.tree package中找到此类所提供 的方法。下面为使用DefaultTreeCellRenderer更改节点图案的一个例子:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import com.incors.plaf.alloy.*;

public class TreeDemo4 {
	public TreeDemo4() {
		JFrame f = new JFrame("TreeDemo");
		Container contentPane = f.getContentPane();

		DefaultMutableTreeNode root = new DefaultMutableTreeNode("资源管理器");
		DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("我的公文包");
		DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("我的电脑");
		DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("收藏夹");
		DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");
		DefaultTreeModel treeModel = new DefaultTreeModel(root);
		treeModel.insertNodeInto(node1, root, root.getChildCount());
		treeModel.insertNodeInto(node2, root, root.getChildCount());
		treeModel.insertNodeInto(node3, root, root.getChildCount());
		treeModel.insertNodeInto(node4, root, root.getChildCount());

		DefaultMutableTreeNode leafnode = new DefaultMutableTreeNode("公司文件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
		leafnode = new DefaultMutableTreeNode("个人信件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
		leafnode = new DefaultMutableTreeNode("私人文件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());

		leafnode = new DefaultMutableTreeNode("本机磁盘(C:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
		leafnode = new DefaultMutableTreeNode("本机磁盘(D:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
		leafnode = new DefaultMutableTreeNode("本机磁盘(E:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());

		DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("网站列表");
		treeModel.insertNodeInto(node31, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("奇摩站");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("职棒消息");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("网络书店");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
		try {
			LookAndFeel alloyLnF = new AlloyLookAndFeel();
			UIManager.setLookAndFeel(alloyLnF);
		} catch (UnsupportedLookAndFeelException ex) {
			// You may handle the exception here
		}
		// this line needs to be implemented in order to make JWS work properly
		UIManager.getLookAndFeelDefaults().put("ClassLoader",
				getClass().getClassLoader());

		JTree tree = new JTree(treeModel);
		tree.setRowHeight(20);
		DefaultTreeCellRenderer cellRenderer = (DefaultTreeCellRenderer) tree
				.getCellRenderer();
		cellRenderer.setLeafIcon(new ImageIcon("..\\icons\\leaf.gif"));
		cellRenderer.setOpenIcon(new ImageIcon("..\\icons\\open.gif"));
		cellRenderer.setClosedIcon(new ImageIcon("..\\icons\\close.gif"));

		cellRenderer.setFont(new Font("宋体", Font.PLAIN, 12));// 设置字体.
		cellRenderer.setBackgroundNonSelectionColor(Color.white);
		cellRenderer.setBackgroundSelectionColor(Color.yellow);
		cellRenderer.setBorderSelectionColor(Color.red);
		/*
		 * 设置选时或不选时，文字的变化颜色
		 */
		cellRenderer.setTextNonSelectionColor(Color.black);
		cellRenderer.setTextSelectionColor(Color.blue);

		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setViewportView(tree);

		contentPane.add(scrollPane);
		f.pack();
		f.setVisible(true);

		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});

	}

	public static void main(String args[]) {

		new TreeDemo4();
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import com.incors.plaf.alloy.*;

public class TreeDemo3 {
	public TreeDemo3() {
		// 设置成Alloy界面样式
		try {
			AlloyLookAndFeel.setProperty("alloy.isLookAndFeelFrameDecoration",
					"true");
			LookAndFeel alloyLnF = new AlloyLookAndFeel();
			JFrame.setDefaultLookAndFeelDecorated(true);
			UIManager.setLookAndFeel(alloyLnF);
		} catch (UnsupportedLookAndFeelException ex) {
			// You may handle the exception here
		}
		// this line needs to be implemented in order to make JWS work properly
		UIManager.getLookAndFeelDefaults().put("ClassLoader",
				getClass().getClassLoader());

		// JDialog.setDefaultLookAndFeelDecorated(true);
		JFrame f = new JFrame("firstTree");

		Container contentPane = f.getContentPane();
		// if (contentPane instanceof JComponent) {
		// ((JComponent) contentPane).setMinimumSize(new Dimension(100, 100));
		// }
		// Container contentPane = f.getContentPane();

		DefaultMutableTreeNode root = new DefaultMutableTreeNode("资源管理器");
		DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("我的公文包");
		DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("我的电脑");
		DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("收藏夹");
		DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");

		DefaultTreeModel treeModel = new DefaultTreeModel(root);
		treeModel.insertNodeInto(node1, root, root.getChildCount());
		treeModel.insertNodeInto(node2, root, root.getChildCount());
		treeModel.insertNodeInto(node3, root, root.getChildCount());
		treeModel.insertNodeInto(node4, root, root.getChildCount());

		DefaultMutableTreeNode leafnode = new DefaultMutableTreeNode("公司文件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
		leafnode = new DefaultMutableTreeNode("个人信件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
		leafnode = new DefaultMutableTreeNode("私人文件");
		treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());

		leafnode = new DefaultMutableTreeNode("本机磁盘(C:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
		leafnode = new DefaultMutableTreeNode("本机磁盘(D:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
		leafnode = new DefaultMutableTreeNode("本机磁盘(E:)");
		treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());

		DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("网站列表");
		treeModel.insertNodeInto(node31, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("奇摩站");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("职棒消息");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
		leafnode = new DefaultMutableTreeNode("网络书店");
		treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());

		JTree tree = new JTree(treeModel);
		/* 改变JTree的外观* */
		// tree.putClientProperty("JTree.lineStyle","Horizontal");
		/* 改变JTree的外观* */
		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setViewportView(tree);

		contentPane.add(scrollPane);
		f.pack();
		f.setVisible(true);

		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});

	}

	public static void main(String args[]) {

		new TreeDemo3();
	}
}