高仿xp系统画板实现

步骤：

1.先建立一个窗口，设置窗体的大小，位置，关闭方式等等

2.往窗体上添加菜单栏

3.添加面板，同时设置各面板的相关属性（为了区别各面板，每个面板的颜色应该不同用Color.+颜色），再添加到窗体上

4.先设置左边面板的内容

5.再设置下面面板内容

6.最后设置中间

7.实现基本图形绘制：直线，椭圆，矩形

8.实现颜色的选择

9.实现复杂图形的绘制

10.实现画板的重绘

测试类：

package com.huaxin.drawboard;import java.util.Random;/** * 启动程序类 * @author 16974 * */public class Test {public static void main(String[] args) {DrawBoardFrame dbf = new DrawBoardFrame();dbf.initFrame();}}

DrawBoardFrame:

package com.huaxin.drawboard;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.GridLayout;import java.util.ArrayList;import java.util.Random;import javax.swing.ButtonGroup;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JPanel;import javax.swing.JRadioButton;import javax.swing.border.BevelBorder;/** * 绘图工具窗体类 * 主要用于实现当前窗体的效果 * @author 16974 * */public class DrawBoardFrame extends JFrame{public ArrayList<MyShape> list = new ArrayList<MyShape>();public Random ran = new Random();/** * 初始化窗体属性 */public void initFrame(){this.setSize(700,500);this.setDefaultCloseOperation(3);//设置窗体是否能改变大小this.setResizable(false);this.setLocationRelativeTo(null);//1.添加菜单 JMenuBar jMenuBar=new JMenuBar();        setJMenuBar(jMenuBar);        //菜单条        JMenu jMenuFile=new JMenu("文件（F）");        JMenu jMenuEditor=new JMenu("编辑（E）");        JMenu jMenuView=new JMenu("查看（V）");        JMenu jMenuImage=new JMenu("图像（I）");        JMenu jMenuColor=new JMenu("颜色（C）");        JMenu jMenuHelp=new JMenu("查看（H）");        jMenuBar.add(jMenuFile);        jMenuBar.add(jMenuEditor);        jMenuBar.add(jMenuView);        jMenuBar.add(jMenuImage);        jMenuBar.add(jMenuColor);        jMenuBar.add(jMenuHelp);        //文件菜单项        JMenuItem jMenuItemFile[]= {                new JMenuItem("新建（N）    Ctrl+N"),new JMenuItem("打开（O）   Ctrl+O"),new JMenuItem("保存（S）   Ctrl+S"),                new JMenuItem("另存为（A）"),new JMenuItem("从扫描仪或照相机（C）"),new JMenuItem("打印预览（V）"),                new JMenuItem("页面设置（U）"),new JMenuItem("打印（P）   Ctrl+P"),new JMenuItem("发送（E）"),                new JMenuItem("设置为墙纸（平铺）（B）"),new JMenuItem("设置为墙纸（居中）（K）"),new JMenuItem("最近使用过的文件"),                new JMenuItem("退出（X）")        };        for(int i=0;i<13;i++)             jMenuFile.add(jMenuItemFile[i]);        //编辑菜单项        JMenuItem jMenuItemEditor[]= {                new JMenuItem("撤销（U）    Ctrl+Z"),new JMenuItem("重复（R）   Ctrl+Y"),new JMenuItem("剪切（T）   Ctrl+X"),                new JMenuItem("复制（C）    Ctrl+C"),new JMenuItem("粘贴（P）   Ctrl+V"),new JMenuItem("清除选定内容（L）   Del"),                new JMenuItem("全选（A）    Ctrl+A"),new JMenuItem("复制到（O）…"),new JMenuItem("粘贴来源（F）…")        };        for(int i=0;i<9;i++)             jMenuEditor.add(jMenuItemEditor[i]);        //查看菜单项        JMenuItem jMenuItemView[]= {                new JMenuItem("工具箱（T）   Ctrl+T"),new JMenuItem("颜料盒（C）  Ctrl+L"),new JMenuItem("状态栏（S）"),                new JMenuItem("文字工具栏（E）"),new JMenu("缩放（Z）"),new JMenuItem("查看位图（V） Ctrl+F")        };        for(int i=0;i<6;i++)             jMenuView.add(jMenuItemView[i]);        JMenuItem jMenuItemZoom[]= {                new JMenuItem("常规尺寸（N）  Ctrl+PgUp"),new JMenuItem("大尺寸（L）   Ctrl+PgDn"),new JMenuItem("自定义（U）"),                new JMenuItem("显示网格（G）  Ctrl+G"),new JMenuItem("显示缩略图（H）")        };        for(int i=0;i<5;i++)            jMenuItemView[4].add(jMenuItemZoom[i]);        //图像菜单项        JMenuItem jMenuItemImage[]= {                new JMenuItem("翻转/旋转（F） Ctrl+R"),new JMenuItem("拉伸/扭曲（S）    Ctrl+W"),new JMenuItem("反色（I） Ctrl+I"),                new JMenuItem("属性（A）    Ctrl+E"),new JMenuItem("清除图像（C） Ctrl+Shift+N"),new JMenuItem("不透明处理（D）")        };        for(int i=0;i<6;i++)             jMenuImage.add(jMenuItemImage[i]);        //颜色菜单项        jMenuColor.add(new JMenuItem("编辑颜色（E）"));        //帮助菜单项        jMenuHelp.add(new JMenuItem("帮助主题（H）"));        jMenuHelp.add(new JMenuItem("帮助主题（H）"));      //2.添加面板JPanel panelLeft = new JPanel();JPanel panelDown = new JPanel();JPanel panelCenter = new JPanel();//设置面板的相关属性panelLeft.setPreferredSize(new Dimension(50,0));panelDown.setPreferredSize(new Dimension(0,50));panelLeft.setBackground(new Color(235,233,236));panelDown.setBackground(new Color(235,233,236));panelCenter.setBackground(new Color(171,171,171));//把三个面板添加到窗体上this.add(panelLeft,BorderLayout.WEST);this.add(panelDown,BorderLayout.SOUTH);this.add(panelCenter);/********************************左边面板内容设置**********************************///修改左边面板布局，设置为流式，横向纵线间隙为0，左对齐panelLeft.setLayout(new FlowLayout(1,0,0));//给左边面板添加图形选择功能内容//创建按钮组对象，用于封装所有的单选按钮，并实现单选功能ButtonGroup bg = new ButtonGroup();for(int i=0;i<16;i++){JRadioButton jrb = new JRadioButton();//设置指定按钮被选中if(i==10){jrb.setSelected(true);}//给单选按钮设置命令jrb.setActionCommand("pic"+i);//设置按钮图片jrb.setIcon(new ImageIcon("images/draw"+i+".jpg"));jrb.setRolloverIcon(new ImageIcon("images/draw"+i+"-1.jpg"));jrb.setPressedIcon(new ImageIcon("images/draw"+i+"-2.jpg"));jrb.setSelectedIcon(new ImageIcon("images/draw"+i+"-3.jpg"));panelLeft.add(jrb);//去除单选按钮边框jrb.setBorder(null);//添加到组中bg.add(jrb);}//子面板设置JPanel panelC = new JPanel();panelC.setPreferredSize(new Dimension(35,70));//设置边框panelC.setBorder(new BevelBorder(1,Color.white,Color.gray));panelLeft.add(panelC);/********************************下边面板内容设置**********************************/panelDown.setLayout(new FlowLayout(0,10,10));JPanel colorPanel = new JPanel();colorPanel.setPreferredSize(new Dimension(250,30));panelDown.add(colorPanel);//颜色面板左边部分colorPanel.setLayout(new BorderLayout());JPanel colorLeft = new JPanel();JPanel colorRight = new JPanel();colorLeft.setPreferredSize(new Dimension(30,30));colorPanel.add(colorLeft,BorderLayout.WEST);colorPanel.add(colorRight);//颜色左边面板特效colorLeft.setBorder(new BevelBorder(1,Color.white,Color.gray));colorLeft.setLayout(null);JButton bt1 = new JButton();JButton bt2 = new JButton();bt1.setBackground(Color.black);bt1.setBorder(new BevelBorder(0,Color.white,Color.gray));bt2.setBackground(Color.white);bt2.setBorder(new BevelBorder(0,Color.white,Color.gray));bt1.setBounds(3,3,15,15);bt2.setBounds(10,10,15,15);//设置按钮不能使用bt1.setEnabled(false);bt2.setEnabled(false);colorLeft.add(bt1);colorLeft.add(bt2);//右边部分的多个颜色按钮//colorRight.setLayout(new FlowLayout(0,0,0));colorRight.setLayout(new GridLayout(2, 14));//把颜色监听器创建好ColorListener cl = new ColorListener(bt1);for(int i=0;i<28;i++){JButton button = new JButton();button.setPreferredSize(new Dimension(15,15));button.setBorder(new BevelBorder(1,Color.white,Color.gray));button.setBackground(new Color(ran.nextInt(256),ran.nextInt(256),ran.nextInt(256)));colorRight.add(button);//把监听器绑定到按钮上button.addActionListener(cl);}/********************************中间面板内容设置**********************************/panelCenter.setLayout(new FlowLayout(0,5,5));JPanel panelDraw = new JPanel(){public void paint(Graphics g){super.paint(g);//把消失的图形全部重新绘制上来//g.drawLine(10, 10, 100, 100)for(int i=0;i<list.size();i++){MyShape shape = list.get(i);shape.draw((Graphics2D) g);}}};panelDraw.setPreferredSize(new Dimension(400,300));panelDraw.setBackground(Color.white);panelCenter.add(panelDraw);this.setVisible(true);//获取画笔Graphics g = panelDraw.getGraphics();//创建监听器对象DrawListener dl = new DrawListener(g,bg,bt1,list);panelDraw.addMouseListener(dl);panelDraw.addMouseMotionListener(dl);}}

DrawListener:

package com.huaxin.drawboard;import java.awt.AWTException;import java.awt.BasicStroke;import java.awt.Button;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Rectangle;import java.awt.Robot;import java.awt.Stroke;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.awt.image.BufferedImage;import java.util.ArrayList;import java.util.Random;import javax.swing.ButtonGroup;import javax.swing.ButtonModel;import javax.swing.JButton;import org.omg.CORBA.PUBLIC_MEMBER;import com.sun.javafx.geom.Shape;/** * 绘图功能类的实现 * @author 16974 * */    class DrawListener implements MouseListener,MouseMotionListener{public Random ran = new Random();//定义4个值，用于存储按下和释放的坐标public int x1,y1,x2,y2;public  Graphics2D g;public ButtonGroup bg;public JButton jb;public String command;public String type="10";public ArrayList<MyShape>list;public Color color;public Stroke s;public DrawListener(Graphics g,ButtonGroup bg,JButton jb,ArrayList<MyShape>list){this.g = (Graphics2D)g;this.bg = bg;this.jb = jb;this.list = list;}public void mousePressed(MouseEvent e) {x1 = e.getX();y1 = e.getY();//获取选中按钮的图形命令ButtonModel bm = bg.getSelection();String command = bm.getActionCommand();type = command;//设置画笔的颜色g.setColor(jb.getBackground());//把画笔粗细归为默认值1g.setStroke(new BasicStroke (1));}public void mouseReleased(MouseEvent e) {x2 = e.getX();y2 = e.getY();MyShape shape = null;//画图形if(type.equals("pic10")){shape = new MyLine(x1, y1, x2, y2,g.getColor(),g.getStroke());}else if(type.equals("pic12")){shape = new MyRect(x1, y1, x2, y2,g.getColor(),g.getStroke());}else if(type.equals("pic14")){shape = new MyOval(x1, y1, x2, y2,g.getColor(),g.getStroke());}else if (type.equals("pic4")) {try {Robot robot = new Robot();//截屏//创建一个矩形区域对象Rectangle rect = new Rectangle(e.getXOnScreen(),e.getYOnScreen(),1,1);BufferedImage bi = robot.createScreenCapture(rect);//获取图片的像素点颜色int c = bi.getRGB(0, 0);Color color = new Color(c);//把颜色设置到颜色小面板上jb.setBackground(color);} catch (AWTException e1) {e1.printStackTrace();}}else if (type.equals("pic15")){shape = new MyRonundRect(x1, y1, x2, y2, g.getColor(),g.getStroke());}if(shape!=null){shape.draw(g);list.add(shape);}}/* * 拖动鼠标监听 * @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent) */public void mouseDragged(MouseEvent e) {x2 = e.getX();y2 = e.getY();MyShape shape = null;if(type.equals("pic6")){shape = new MyLine(x1, y1, x2, y2,g.getColor(),g.getStroke());x1 = x2;y1 = y2;}else if (type.equals("pic7")) {Stroke s = new BasicStroke(10);g.setStroke(s);//改变笔的粗细shape = new MyLine(x1, y1, x2, y2,g.getColor(),g.getStroke());x1 = x2;y1 = y2;}else if (type.equals("pic2")) {Stroke s = new BasicStroke(10);g.setStroke(s);//改变笔的粗细Color color = new Color(255, 255, 255);g.setColor(color);shape = new MyLine(x1, y1, x2, y2,g.getColor(),g.getStroke());x1 = x2;y1 = y2;}else if (type.equals("pic8")) {shape = new MyLine(x1, y1, x2, y2,g.getColor(),g.getStroke());for(int i=0;i<30;i++){int x_p = ran.nextInt(21)-10;int y_p = ran.nextInt(21)-10;shape = new MyLine(x2+x_p, y2+y_p, x2+x_p, y2+y_p,g.getColor(),g.getStroke());}}if(shape!=null){shape.draw(g);list.add(shape);}}public void mouseEntered(MouseEvent e) {}public void mouseExited(MouseEvent e) {}public void mouseClicked(MouseEvent e) {}public void mouseMoved(MouseEvent e) {}}

ColorListener类:

package com.huaxin.drawboard;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;public class ColorListener implements ActionListener{public JButton jb;public ColorListener(JButton jb){this.jb = jb;}public void actionPerformed(ActionEvent e) {//获取触发这个事件的按钮的背景色：获取事件源JButton button = (JButton)e.getSource();//获取按钮的背景色Color color = button.getBackground();//把颜色设置到前面小按钮上，作为背景色jb.setBackground(color);}}

MyShape类：

package com.huaxin.drawboard;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Stroke;public abstract class MyShape {public int x1,y1,x2,y2;public Color color;public Stroke s;public MyShape(int x1,int y1,int x2,int y2,Color color,Stroke s){super();this.x1 = x1;this.y1 = y1;this.x2 = x2;this.y2 = y2;this.color = color;this.s = s;}public abstract void draw(Graphics2D g);}

MyLine:类：

package com.huaxin.drawboard;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Stroke;public  class MyLine extends MyShape {public MyLine(int x1, int y1, int x2, int y2,Color color,Stroke s) {super(x1, y1, x2, y2,color,s);}public void draw(Graphics2D g){//设置画笔颜色g.setColor(color);//设置画笔粗细g.setStroke(s);g.drawLine(x1, y1, x2, y2);}}

MyRect类：

package com.huaxin.drawboard;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Stroke;public class MyRect extends MyShape{public MyRect(int x1, int y1, int x2, int y2,Color color,Stroke s) {super(x1, y1, x2, y2,color,s);}public void draw(Graphics2D g) {//设置画笔颜色g.setColor(color);//设置画笔粗细g.setStroke(s);g.drawRect(Math.min(x1,x2),Math.min(y1, y2), Math.abs(x2-x1), Math.abs(y2-y1));}}

MyOval类：

package com.huaxin.drawboard;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Stroke;public class MyOval extends MyShape{public MyOval(int x1, int y1, int x2, int y2,Color color,Stroke s) {super(x1, y1, x2, y2,color,s);}public void draw(Graphics2D g) {g.setColor(color); g.setStroke(s);g.drawOval(Math.min(x1,x2),Math.min(y1, y2), Math.abs(x2-x1), Math.abs(y2-y1));}}

MyRonundRect类：

package com.huaxin.drawboard;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Stroke;public class MyRonundRect extends MyShape {public MyRonundRect(int x1, int y1, int x2, int y2, Color color, Stroke s) {super(x1, y1, x2, y2, color, s);}public void draw(Graphics2D g){        //设置画笔颜色g.setColor(color);//设置画笔粗细g.setStroke(s);g.drawRoundRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x2-x1), Math.abs(y2-y1),10, 10);  }}

完成后测试：