elegantpanel.java

来自「Hibernate开发及整合应用大全 蔡雪焘编著 本书用典型的示例剖析Hiber」· Java 代码 · 共 144 行

package net.sf.hibernate.console.docking;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import net.eleritec.docking.Dockable;
import net.eleritec.docking.DockingPort;


public class ElegantPanel extends JPanel {
	private Dockable dockable;
	private JLabel titleLabel;
	
	private final String id;
	
	public String getViewId() {
		return id;
	}
	static class GradientPanel extends JPanel {
		
		private static final Color GRAD_MID = new Color(168, 203, 239);
		private static final Color GRAD_START = new Color(10, 36, 106);
		
		
		public GradientPanel() {
			super(new BorderLayout());		
		}
		
		protected void paintComponent(Graphics g) {
			super.paintComponent(g);
			Insets in = getInsets();
			int mid = getWidth()/2;
			int y = in.top + 13;
			int farRight = getWidth()-in.right;
			int w = farRight - in.left;
			
			GradientPaint firstHalf = new GradientPaint(in.left, y, GRAD_START, mid, y, GRAD_MID);
			GradientPaint secondHalf = new GradientPaint(mid, y, GRAD_MID, farRight, y, getBackground());
			
			Graphics2D g2 = (Graphics2D)g;
			g2.setPaint(firstHalf);
			g2.fillRect(in.left, in.top, w/2, 25);
			g2.setPaint(secondHalf);
			g2.fillRect(mid-1, in.top, w/2, 25);
			
			g.setColor(getBackground().brighter());
			g.drawLine(in.left, in.top, farRight,  in.top);
			g.drawLine(in.left, in.top, in.left, in.top+25);
			
			g.setColor(getBackground().darker());
			g.drawLine(in.left, in.top+25, farRight, in.top+25);
		}
	}
	public ElegantPanel(String title) {
		this(title,null,null);
	}
	
	public ElegantPanel(String id, String title, Component container) {
		super(new BorderLayout());
		this.id = id;
		JPanel top = new GradientPanel(); 
		top.add(getTitleLabel(), BorderLayout.CENTER);
			AbstractAction close = new AbstractAction() {
					public void actionPerformed(ActionEvent ae) {
						// can't use DockingManager.undock() since it does not perform a proper repaint ;(						
						Component p = getParent();
						while(!(p instanceof DockingPort)) {
							p = p.getParent();
						}
						if(p!=null) {
							DockingPort dockingPort = ((DockingPort)p);
							dockingPort.undock(ElegantPanel.this);
							
							//p.invalidate();
							p.repaint();
						}
					}
			};
		JButton button = new JButton(close);
		button.setOpaque(false);
		button.setBorder(new EmptyBorder(2,2,2,2));
		button.setLabel("X");
		top.add(button, BorderLayout.EAST);
		add(top, BorderLayout.NORTH);
		if(container!=null) {
			add(container, BorderLayout.CENTER);
		}
		
		setTitle(title);
		dockable = getDockable();
	}
	
	public Dockable getDockable() {
		if(dockable==null) {
			dockable = new DockableImpl(id,this, getTitleLabel());			
		}
		return dockable;
	}
	
	public String getTitle() {
		return getTitleLabel().getText();
	}

	private JLabel getTitleLabel() {
		if(titleLabel!=null)
			return titleLabel;
			
		titleLabel = new JLabel();
		titleLabel.setForeground(Color.white);
		titleLabel.setBackground(Color.blue);
		titleLabel.setFont(titleLabel.getFont().deriveFont(Font.PLAIN));
		titleLabel.setBorder(new EmptyBorder(4,4,4,4));
		return titleLabel;
	}
	
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
				
	}
	
	

	public void setTitle(String title) {
		if(title==null)
			title = "";
		title = title.trim();
		getTitleLabel().setText(title);		
	}
}