iconcellrenderer.java

企业级的即时通软件。。java语言写的 这是服务端部份。

package edu.sccp.chat.IconIntercalate;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeCellRenderer;


/*
 * 选中后效果设置
 */
public class IconCellRenderer extends JLabel implements TreeCellRenderer {
	
	protected Color m_textSelectionColor;

	protected Color m_textNonSelectionColor;

	protected Color m_bkSelectionColor;

	protected Color m_bkNonSelectionColor;

	protected Color m_borderSelectionColor;

	protected boolean m_selected;

	public IconCellRenderer() {
		super();
		m_textSelectionColor = UIManager.getColor("Tree.selectionForeground");
		m_textNonSelectionColor = UIManager.getColor("Tree.textForeground");
		m_bkSelectionColor = UIManager.getColor("Tree.selectionBackground");
		m_bkNonSelectionColor = UIManager.getColor("Tree.textBackground");
		m_borderSelectionColor = UIManager.getColor("Tree.selectionBorderColor");
		//setOpaque(false);
	}
	//设置图片和背景色
	public Component getTreeCellRendererComponent(JTree tree, Object value,
			boolean sel, boolean expanded, boolean leaf, int row,
			boolean hasFocus)

	{
		DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
		Object obj = node.getUserObject();
		setText(obj.toString());
		if (obj instanceof IconData) {
			IconData idata = (IconData) obj;
			if (expanded)
				setIcon(idata.getOpenIcon());
			else
				setIcon(idata.getIcon());
		} else
			setIcon(null);

		setFont(tree.getFont());
		setForeground(sel ? m_textSelectionColor : m_textNonSelectionColor);
		setBackground(sel ? m_bkSelectionColor : m_bkNonSelectionColor);
		m_selected = sel;
		return this;
	}
	//选择后的强调色绘制
	public void paint(Graphics g) {
		Color bColor = getBackground();
		Icon icon = getIcon();

		g.setColor(bColor);
		int offset = 0;
		if (icon != null && getText() != null)
			offset = icon.getIconWidth() ;
		g.fillRect(offset, 0, getWidth() - 1 - offset, getHeight() - 1);

		if (m_selected) {
			g.setColor(m_borderSelectionColor);
			g.drawRect(offset, 0, getWidth() - 1 - offset, getHeight() - 1);
		}

		super.paint(g);
	}
}