画图软件Java实现（面向对象程序设计） |
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画图软件Java实现（面向对象程序设计）
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画图软件
一、需求
利用面向对象的思想，设计并实现一个画图软件。实现基本的图形绘制功能、文本绘制功能、橡皮檫功能、撤销功能以及图片的存取功能，画图软件具有美观的用户界面。使用户可以绘制直线、曲线、矩形、圆、三角形、五边形、六边形和椭圆等基本图形，可以设置画笔的粗细和颜色，以及绘制填充图形，文件读取最终实现jpg、bmp、png和gif格式的存取。 二、总体设计通过分析，画图软件主界面主要分为菜单栏、工具栏、调色板、画板和状态栏五个部分，将主界面设计为一个MyFrame类，将主界面上的菜单栏、工具栏、调色板等均分装成一个类，完成各自的功能。将菜单栏分装成MyMenu类，主要实现图片的打开、保存和新建功能，画笔颜色粗细设置功能，以及软件的使用说明；将工具栏封装成MyToolbar类，主要实现图形绘制按钮，文本绘制、文本字体大小和字体风格的设置，同时添加保存文件、清空画板和撤销功能的快捷按钮；将调色板封装成ColorPanel类，主要用来设置画笔的颜色，可以使用设计好的16种颜色，也可以通过JColorChooser（颜色选择器）选择更多的颜色；将画板封装成DrawPanel类，主要实现图形以及文本的绘制；状态栏作为MyFrame类的成员变量，用于显示鼠标当前的位置。 对于图形绘制，设计一个抽象Shape类，包含图形绘制的基本属性值和一个抽象draw(Graphics2D g)方法；其他图形类对象均继承Shape类，并实现抽象方法。 程序一共设计com.edu.nwafu.shape、com.edu.nwafu.start和com.edu.nwafu.tool三个包，分别存放图形类对象、主界面和调色板。 三、最终软件效果图代码连接：https://github.com/HansGerry/Painting MyFrame类 package com.edu.nwafu.start; import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import javax.swing.*; import javax.swing.filechooser.FileFilter; import com.edu.nwafu.shape.Circle; import com.edu.nwafu.shape.Hexagon; import com.edu.nwafu.shape.Images; import com.edu.nwafu.shape.Line; import com.edu.nwafu.shape.Oval; import com.edu.nwafu.shape.Brush; import com.edu.nwafu.shape.Pencil; import com.edu.nwafu.shape.Pentagon; import com.edu.nwafu.shape.Rectangle; import com.edu.nwafu.shape.RoundRect; import com.edu.nwafu.shape.Rubber; import com.edu.nwafu.shape.Shape; import com.edu.nwafu.shape.Text; import com.edu.nwafu.shape.Triangle; import com.edu.nwafu.shape.FillCircle; import com.edu.nwafu.shape.FillOval; import com.edu.nwafu.shape.FillRect; import com.edu.nwafu.shape.FillRoundRect; import com.edu.nwafu.tool.ColorPanel; public class MyFrame extends JFrame { /** * */ private static final long serialVersionUID = 1L; // 保存文件的标志 public static int saved = 0; // private Container c; // 声明颜色属性，并赋默认值 public static Color c = Color.black; // String oldName; // 原窗口名标记 // 按钮属性，便于其他类访问 public Graphics2D g;// 画笔 public int lengthCount; // 铅笔或橡皮擦图形的存储长度 // private JButton[] btn_paint;// 定义各种绘图的按钮 public static String fontName = new String(" 宋体 "); private static int fSize = 16; private static int blodtype = Font.PLAIN;// 粗体,默认正常 private static int italic = Font.PLAIN;// 斜体 // private ImageIcon[] icon; // 存放按钮的图片 public static int index = 0;// 图形形状的标记 public static Shape[] itemList = new Shape[5000];// 图形存储单元 private DrawPanel drawingArea; // 画图区域 private JLabel statusBar;// 鼠标状态 public static int stroke = 1;// 画笔粗细 public static Color color = Color.black;// 用于存放当前颜色 public static int currentChoice = 3; // 初始状态是画笔 // 菜单类 MyMenu menu; // 工具条 MyToolbar myToolbar; // 调色板 ColorPanel colorPanel; int length; // 铅笔或橡皮擦的笔迹长度 public MyFrame(String s) { init(s); setVisible(true); } public MyFrame() { } public void init(String s) { this.setTitle(s);// 设置标题 this.setSize(950, 600);// 设置窗口大小 this.setLocationRelativeTo(null);// 居中显示 // 添加菜单 menu = new MyMenu(); myToolbar = new MyToolbar(); colorPanel = new ColorPanel(); add(colorPanel, BorderLayout.WEST); // 设置窗体图标 try { ImageIcon imageIcon = new ImageIcon(getClass().getResource("/image/themeicon.png")); Image image = imageIcon.getImage(); this.setIconImage(image); } catch (Exception e) { JOptionPane.showMessageDialog(null, "图标异常"); } // 创建各种基本图形的按钮 drawingArea = new DrawPanel(); this.add(drawingArea, BorderLayout.CENTER); statusBar = new JLabel(); this.add(statusBar, BorderLayout.SOUTH); statusBar.setText("坐标"); /** * 由于JLable是透明的，当我们把JLabel控件加载到JPanel控件之上时， 会发现JLabel的背景色总是和JPanel的背景色保持一致, */ statusBar.setOpaque(true);// 设置该组件为透明 statusBar.setBackground(new Color(195, 195, 195)); drawingArea.createNewGraphics(); this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { if (saved == 0) { int n = JOptionPane.showConfirmDialog(null, "您还没保存，确定要退出？", "提示", JOptionPane.OK_CANCEL_OPTION); if (n == 0) { System.exit(0); } } if (saved == 1) { System.exit(0); } } }); } // 画图面板类，用来画图 class DrawPanel extends JPanel { private static final long serialVersionUID = 1L; public DrawPanel() { // 设置光标类型，为十字形 this.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR)); //设置背景颜色 this.setBackground(Color.white); //设置鼠标监听 this.addMouseListener(new mouseAction()); this.addMouseMotionListener(new MouseMOtion()); } //重写paintComponent方法，使得画板每次刷新时可将之前的所有图形重新画出来。 public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g; // 定义画板 int j = 0; while (j = 0) { if (currentChoice == 3 || currentChoice == 16 || currentChoice == 17) { index -= itemList[index].length; } else { index--; } drawingArea.repaint(); } index++; drawingArea.createNewGraphics(); } // 新建一个画图基本单元对象的程序段 public void createNewGraphics() { /** * MOVE_CURSOR:移动光标类型。 CROSSHAIR_CURSOR:十字光标 CUSTOM_CURSOR 制定类型 WAIT_CURSOR * 等待光标类型 */ if (currentChoice == 16) { try { // 定义鼠标进入画板时的样式 String url = "/image/cursor.png"; // 储存鼠标图片的位置 Toolkit tk = Toolkit.getDefaultToolkit(); Image image = new ImageIcon(getClass().getResource(url)).getImage(); Cursor cursor = tk.createCustomCursor(image, new Point(10, 10), "norm"); drawingArea.setCursor(cursor); } catch (Exception e) { JOptionPane.showMessageDialog(null, "自定义光标异常"); } } else if (currentChoice == 18) { drawingArea.setCursor(Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR)); } else { drawingArea.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));// 光标设置 } switch (currentChoice) { case 0: itemList[index] = new Images(); break; case 3: itemList[index] = new Pencil(); break; case 4: itemList[index] = new Line(); break; case 5: itemList[index] = new Rectangle(); break; case 6: itemList[index] = new FillRect(); break; case 7: itemList[index] = new Oval(); break; case 8: itemList[index] = new FillOval(); break; case 9: itemList[index] = new Circle(); break; case 10: itemList[index] = new FillCircle(); break; case 11: itemList[index] = new RoundRect(); break; case 12: itemList[index] = new FillRoundRect(); break; case 13: itemList[index] = new Triangle(); break; case 14: itemList[index] = new Pentagon(); break; case 15: itemList[index] = new Hexagon(); break; case 16: itemList[index] = new Rubber(); break; case 17: itemList[index] = new Brush(); break; case 18: itemList[index] = new Text(); String input; input = JOptionPane.showInputDialog("请输入文字"); itemList[index].s = input; itemList[index].fontSize = fSize; itemList[index].fontName = fontName; itemList[index].italic = italic; itemList[index].blodtype = blodtype; break; } itemList[index].color = color; itemList[index].width = stroke; } // 鼠标事件mouseAction类，继承了MouseAdapter，用来完成鼠标相应事件操作 class mouseAction extends MouseAdapter { public void mousePressed(MouseEvent e) { statusBar.setText("坐标:[" + e.getX() + "," + e.getY() + "]像素");// 设置状态提示 itemList[index].x1 = itemList[index].x2 = e.getX(); itemList[index].y1 = itemList[index].y2 = e.getY(); // 如果当前选择的图形是画笔或者橡皮檫，则进行下面的操作 if (currentChoice == 3 || currentChoice == 16 || currentChoice == 17) { lengthCount = 0; itemList[index].x1 = itemList[index].x2 = e.getX(); itemList[index].y1 = itemList[index].y2 = e.getY(); index++; lengthCount++; createNewGraphics(); } } public void mouseReleased(MouseEvent e) { statusBar.setText("坐标:[" + e.getX() + "," + e.getY() + "]像素"); if (currentChoice == 3 || currentChoice == 16 || currentChoice == 17) { itemList[index].x1 = e.getX(); itemList[index].y1 = e.getY(); lengthCount++; itemList[index].length = lengthCount; } itemList[index].x2 = e.getX(); itemList[index].y2 = e.getY(); repaint(); index++; createNewGraphics(); } public void mouseEntered(MouseEvent e) { statusBar.setText("坐标:[" + e.getX() + "," + e.getY() + "]像素"); } public void mouseExited(MouseEvent e) { statusBar.setText("坐标："); } } // 鼠标事件mouseMOtion类继承了MouseMotionAdapter,用来完成鼠标拖动和鼠标移动时的响应操作 class MouseMOtion extends MouseMotionAdapter { public void mouseDragged(MouseEvent e) { statusBar.setText("坐标:[" + e.getX() + "," + e.getY() + "]像素"); if (currentChoice == 3 || currentChoice == 16 || currentChoice == 17) { itemList[index - 1].x1 = itemList[index].x2 = itemList[index].x1 = e.getX(); itemList[index - 1].y1 = itemList[index].y2 = itemList[index].y1 = e.getY(); index++; lengthCount++; createNewGraphics(); } else { itemList[index].x2 = e.getX(); itemList[index].y2 = e.getY(); } repaint(); } public void mouseMoved(MouseEvent e) { statusBar.setText("坐标:[" + e.getX() + "," + e.getY() + "]像素"); } } } // 保存图形文件程序 class MyMenu { /** * 菜单初始化部分 */ private JMenuBar jMenuBar;// 菜单条 private JMenuItem file_item_new, file_item_open, file_item_save, file_item_exit;// 定文件菜单的菜单项 private JMenuItem set_item_color, set_item_undo;// 定设置菜单的菜单项 private JMenuItem[] stroke_item; private JMenuItem help_item_info; private JMenuItem help_item_use; private JMenu file_menu, set_menu, help_menu, stroke_menu;// 定义文件、设置、帮助菜单 private String strokes[] = { "/image/stroke1.png", "/image/stroke2.png", "/image/stroke3.png", "/image/stroke4.png" }; public MyMenu() { addMenu(); } public void addMenu() { jMenuBar = new JMenuBar(); stroke_item = new JMenuItem[strokes.length]; // 实例化菜单对象 file_menu = new JMenu("文件"); set_menu = new JMenu("设置"); help_menu = new JMenu("帮助"); stroke_menu = new JMenu("粗细"); // 实例化菜单项,并通过ImageIcon对象添加图片 file_item_new = new JMenuItem("新建", new ImageIcon(getClass().getResource("/image/new.png"))); file_item_open = new JMenuItem("打开", new ImageIcon(getClass().getResource("/image/open.png"))); file_item_save = new JMenuItem("保存", new ImageIcon(getClass().getResource("/image/save.png"))); file_item_exit = new JMenuItem("退出", new ImageIcon(getClass().getResource("/image/exit.png"))); set_item_color = new JMenuItem("颜色", new ImageIcon(getClass().getResource("/image/color.png"))); set_item_undo = new JMenuItem("撤销", new ImageIcon(getClass().getResource("/image/undo.png"))); help_item_use = new JMenuItem("使用手册"); help_item_info = new JMenuItem("关于画图"); for (int i = 0; i < 4; i++) { stroke_item[i] = new JMenuItem("", new ImageIcon(getClass().getResource(strokes[i]))); stroke_menu.add(stroke_item[i]); } help_item_info.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(null, "" + "关于画图\n" + "****该软件由1111111开发完成****\n" + "****班级：计算机1602班 *****\n" + "****学号：111111 *****\n" + "****邮箱：[email protected]\n", "关于画图", JOptionPane.PLAIN_MESSAGE); } }); help_item_use.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(null, "" + "##################\r\n" + "#画图软件使用说明书#\r\n" + "####################\r\n" + "1.本软件可以实现以下功能：\r\n" + "（1）在画布上绘制直线、矩形、椭圆等图形\r\n" + "（2）设置画笔的颜色和粗细\r\n" + "（3）绘制填充图形\r\n" + "（4）依据鼠标轨迹绘制曲线\r\n" + "（5）橡皮擦、保存图片\r\n" + "2.本软件主要分为四个模块：菜单、工具栏、调色板、和画布\r\n" + "（1）菜单栏的文件子菜单包括打开、新建、保存图片以及退出程序，设置有快捷键，方便操作，\r\n" + " 菜单栏的设置子菜单包括设置画笔的粗细和颜色；\r\n" + "（2）工具栏主要包括保存文件、清空画板、撤回操作、图形绘制和文字的绘制；\r\n" + "（3）调色板位于界面的左侧，用于设置画笔的颜色，可以使用已设定的颜色，也可以自己选择系统提供的颜色；\r\n" + "（4）画布用于图形绘制，使用鼠标选中要绘制的图形即可进行绘制。", "使用说明", JOptionPane.PLAIN_MESSAGE); } }); help_menu.add(help_item_use); help_menu.add(help_item_info); // 设置快捷键 file_item_new.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK)); file_item_open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK)); file_item_save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK)); file_item_exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK)); set_item_undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK)); // 添加粗细子菜单 // 添加菜单项到菜单 file_menu.add(file_item_new); file_menu.add(file_item_open); file_menu.add(file_item_save); file_menu.add(file_item_exit); set_menu.add(set_item_color); set_menu.add(set_item_undo); set_menu.add(stroke_menu); // 添加菜单到菜单条 jMenuBar.add(file_menu); jMenuBar.add(set_menu); jMenuBar.add(help_menu); // 添加菜单条 setJMenuBar(jMenuBar); // 给文件菜单设置监听 file_item_new.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { menu.newFile(); } }); file_item_save.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 保存文件，并将标志符saved设置为1 menu.saveFile(); saved = 1; } }); file_item_open.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 打开文件，并将标志符saved设置为0 menu.openFile(); saved = 0; } }); file_item_exit.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 如果文件已经保存就直接退出，若果文件没有保存，提示用户选择是否退出 if (saved == 1) { System.exit(0); } else { int n = JOptionPane.showConfirmDialog(null, "您还没保存，确定要退出？", "提示", JOptionPane.OK_CANCEL_OPTION); if (n == 0) { System.exit(0); } } } }); // 给设置菜单添加监听 set_item_color.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 设置粗细 ColorPanel.chooseColor(); } }); set_item_undo.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 撤销 drawingArea.undo(); } }); stroke_item[0].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { stroke = 1; itemList[index].width = stroke; } }); stroke_item[1].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { stroke = 5; itemList[index].width = stroke; } }); stroke_item[2].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { stroke = 15; itemList[index].width = stroke; } }); stroke_item[3].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { stroke = 25; itemList[index].width = stroke; } }); } // 保存图形文件 public void saveFile() { // 文件选择器 JFileChooser fileChooser = new JFileChooser(); // 设置文件显示类型为仅显示文件 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); // 文件过滤器 JpgFilter jpg = new JpgFilter(); BmpFilter bmp = new BmpFilter(); PngFilter png = new PngFilter(); GifFilter gif = new GifFilter(); // 向用户可选择的文件过滤器列表添加一个过滤器。 fileChooser.addChoosableFileFilter(jpg); fileChooser.addChoosableFileFilter(bmp); fileChooser.addChoosableFileFilter(png); fileChooser.addChoosableFileFilter(gif); // 返回当前的文本过滤器，并设置成当前的选择 fileChooser.setFileFilter(fileChooser.getFileFilter()); // 弹出一个 "Save File" 文件选择器对话框 int result = fileChooser.showSaveDialog(MyFrame.this); if (result == JFileChooser.CANCEL_OPTION) { return; } File fileName = fileChooser.getSelectedFile(); if (!fileName.getName().endsWith(fileChooser.getFileFilter().getDescription())) { String t = fileName.getPath() + fileChooser.getFileFilter().getDescription(); fileName = new File(t); } fileName.canWrite(); if (fileName == null || fileName.getName().equals("")) { JOptionPane.showMessageDialog(fileChooser, "无效的文件名", "无效的文件名", JOptionPane.ERROR_MESSAGE); } BufferedImage image = createImage(drawingArea); try { ImageIO.write(image, "png", fileName); } catch (IOException e) { e.printStackTrace(); } } // 打开文件 public void openFile() { // 文件选择器 JFileChooser fileChooser = new JFileChooser(); // 设置文件显示类型为仅显示文件 fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY); // 文件过滤器 JpgFilter jpg = new JpgFilter(); BmpFilter bmp = new BmpFilter(); PngFilter png = new PngFilter(); GifFilter gif = new GifFilter(); // 向用户可选择的文件过滤器列表添加一个过滤器。 fileChooser.addChoosableFileFilter(jpg); fileChooser.addChoosableFileFilter(bmp); fileChooser.addChoosableFileFilter(png); fileChooser.addChoosableFileFilter(gif); // 返回当前的文本过滤器，并设置成当前的选择 fileChooser.setFileFilter(fileChooser.getFileFilter()); // 弹出一个 "Open File" 文件选择器对话框 int result = fileChooser.showOpenDialog(MyFrame.this); if (result == JFileChooser.CANCEL_OPTION) { return; } // 得到选择文件的名字 File fileName = fileChooser.getSelectedFile(); if (!fileName.getName().endsWith(fileChooser.getFileFilter().getDescription())) { JOptionPane.showMessageDialog(MyFrame.this, "文件格式错误！"); return; } fileName.canRead(); if (fileName == null || fileName.getName().equals("")) { JOptionPane.showMessageDialog(fileChooser, "无效的文件名", "无效的文件名", JOptionPane.ERROR_MESSAGE); } BufferedImage image; try { index = 0; currentChoice = 0; image = ImageIO.read(fileName); drawingArea.createNewGraphics(); itemList[index].image = image; itemList[index].board = drawingArea; drawingArea.repaint(); index++; currentChoice = 3; drawingArea.createNewGraphics(); } catch (IOException e) { e.printStackTrace(); } } //新建文件 public void newFile() { index = 0; currentChoice = 3; color = Color.black; stroke = 1; drawingArea.createNewGraphics(); repaint(); } // 创建image，由saveFile方法调用 // 将画板内容画到panelImage上 public BufferedImage createImage(DrawPanel panel) { int width = MyFrame.this.getWidth(); int height = MyFrame.this.getHeight(); BufferedImage panelImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g2D = (Graphics2D) panelImage.createGraphics(); g2D.setColor(Color.WHITE); g2D.fillRect(0, 0, width, height); g2D.translate(0, 0); panel.paint(g2D); g2D.dispose(); return panelImage; } // 文件过滤 class JpgFilter extends FileFilter { @Override public boolean accept(File f) { if (f.isDirectory()) return true; return f.getName().endsWith(".jpg"); } @Override public String getDescription() { return ".jpg"; } } class BmpFilter extends FileFilter { @Override public boolean accept(File f) { if (f.isDirectory()) return true; return f.getName().endsWith(".bmp"); } @Override public String getDescription() { return ".bmp"; } } class GifFilter extends FileFilter { @Override public boolean accept(File f) { if (f.isDirectory()) return true; return f.getName().endsWith(".gif"); } @Override public String getDescription() { return ".gif"; } } class PngFilter extends FileFilter { @Override public boolean accept(File f) { if (f.isDirectory()) return true; return f.getName().endsWith(".png"); } @Override public String getDescription() { return ".png"; } } } class MyToolbar { /** * 工具栏初始化部分 */ private ImageIcon[] icon; // 存放按钮的图片 private JButton[] btn_paint;// 定义各种绘图的按钮 private JComboBox jfont; private JComboBox jfont_size; private JToolBar toolbar; // 定义按钮面板 private Checkbox btn_blod;// 粗体 private Checkbox btn_italic;// 斜体 // 将图片资源的相对路径存放于数组中，方便使用 private String images[] = { "/image/save.png", "/image/refresh.png", "/image/undo.png", "/image/pencil.png", "/image/line.png", "/image/rectangle.png", "/image/rectangle3.png", "/image/oval.png", "/image/oval2.png", "/image/circle.png", "/image/fillcircle.png", "/image/rectangle2.png", "/image/rectangle4.png", "/image/triangle.png", "/image/pentagon.png", "/image/hexagon.png", "/image/eraser.png", "/image/brush.png", "/image/font.png", }; private String tipText[] = { "保存", "清空", "撤销", "铅笔", "直线", "空心矩形", "填充矩形", "空心椭圆", "填充椭圆", "空心圆形", "填充圆形", "空心圆角矩形", "填充圆角矩形", "三角形", "五边形", "六边形", "橡皮擦", "填充", "文本", "粗细" }; private String font[] = { "宋体", "隶书", "华文彩云", "仿宋_GB2312", "华文行楷", "方正舒体" }; private String fontSize[] = { "8", "9", "10", "11", "12", "14", "16", "18", "20", "22", "24", "26", "28", "36", "48", "72" }; public MyToolbar() { addToorbar(); } public void addToorbar() { btn_paint = new JButton[images.length];// 定义指定个数的按钮 toolbar = new JToolBar("工具栏");// 实例化一个水平的工具标签 toolbar.setLayout(new FlowLayout(FlowLayout.LEFT)); toolbar.setBackground(new Color(195, 195, 195)); btn_blod = new Checkbox("粗体"); btn_italic = new Checkbox("斜体"); btn_blod.setBackground(new Color(195, 195, 195)); btn_italic.setBackground(new Color(195, 195, 195)); btn_blod.setPreferredSize(new Dimension(40, 30)); btn_italic.setPreferredSize(new Dimension(40, 30)); jfont_size = new JComboBox(fontSize); jfont_size.setPreferredSize(new Dimension(50, 30)); jfont = new JComboBox(font); jfont.setPreferredSize(new Dimension(100, 30)); icon = new ImageIcon[images.length]; // 设置按钮图标以及图片 for (int i = 0; i < images.length; i++) { // System.out.println(images[i]);//测试 btn_paint[i] = new JButton(); icon[i] = new ImageIcon(getClass().getResource(images[i])); btn_paint[i].setIcon(icon[i]); btn_paint[i].setToolTipText(tipText[i]); btn_paint[i].setPreferredSize(new Dimension(28, 28));// 设置图标大小 // btn_paint[i].setBorderPainted(false);// 去边框 // btn_paint[i].setContentAreaFilled(false); btn_paint[i].setBackground(Color.WHITE); toolbar.add(btn_paint[i]); } toolbar.setFloatable(true);// 可以拖动 // toolbar.addSeparator(); // 字体格式：斜体，粗体 toolbar.add(btn_italic); toolbar.add(btn_blod); // 将动作侦听器加入到按钮里面 for (int i = 2; i < images.length; i++) { btn_paint[i].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { for (int j = 0; j < images.length; j++) { // 如果按钮被点击。则设置相应的画笔 if (e.getSource() == btn_paint[j]) { currentChoice = j; // System.out.println(images[j]); // System.out.println(j);// 测试 监听设置 drawingArea.createNewGraphics(); repaint(); } } } }); } btn_paint[0].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { menu.saveFile(); saved = 1; } }); btn_paint[1].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { menu.newFile(); } }); btn_paint[2].addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { drawingArea.undo(); } }); // 添加监听 btn_italic.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { italic = Font.ITALIC; } }); btn_blod.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { blodtype = Font.BOLD; } }); // 设置字体大小 toolbar.add(jfont_size); jfont_size.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { fSize = Integer.parseInt(fontSize[jfont_size.getSelectedIndex()]); // System.out.println(fSize); } }); // 设置字体 toolbar.add(jfont); jfont.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { fontName = font[jfont.getSelectedIndex()]; // System.out.println(fontName); } }); MyFrame.this.add(toolbar, BorderLayout.NORTH);// 添加按钮面板到容器中 } } }
Start类 package com.edu.nwafu.start; import javax.swing.UIManager; public class StartProject { /** * 启动界面 */ public static MyFrame wds; public static void main(String[] args) { // try { // //调用Windows的文件系统 // UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); // } catch (Exception e) { // // } wds = new MyFrame("画图"); } } Shape类 package com.edu.nwafu.shape; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.Serializable; import javax.swing.JPanel; public abstract class Shape implements Serializable { /** * 抽象父类,所有图形类均要继承该类 */ private static final long serialVersionUID = 1L; public int x1, y1, x2, y2;// 绘制图形的坐标 public Color color;// 画笔颜色 public int width;// 画笔粗细 public int currentChoice; // 形状 public int length; // 铅笔或橡皮擦的笔迹长度 public BufferedImage image; // 存放待打开图片 public JPanel board; // 绘画的画板 public int fontSize;//字体大小 public String fontName;//字体 public String s;//文本 public int blodtype;//粗体 public int italic;//斜体 //抽象方法 public abstract void draw(Graphics2D g); }其他图形类 package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.util.Random; /** * 喷漆 * @author Administrator * */ public class Brush extends Shape { /** * 定义一个Brush类，继承Shape类，实现刷子功能 */ private static final long serialVersionUID = 1L; private int fx[] = new int[100]; private int fy[] = new int[100]; public Brush(){ Random random = new Random(); for (int i = 0; i < 100; i++) { fx[i] = random.nextInt(16)- 16; fy[i] = random.nextInt(16)- 16; //System.out.println("("+fx[i]+","+fy[i]+")"); } } public void draw(Graphics2D g) { g.setPaint(color);; g.setStroke(new BasicStroke(0, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL)); for (int i = 0; i < 100; i++) { double d = (double) fx[i]; double c = (double) fy[i]; g.drawLine((int) (x1 + d * Math.sin(d)), (int) (y1 + c * Math.sin(c)), (int) (x2 + d * Math.sin(d)), (int) (y2 + c * Math.sin(c))); } } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; /** * 定义一个Circle类，继承Shape类，用于绘制一个空心圆 * @author 沈仕瑞 * */ public class Circle extends Shape{ /** * */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawOval(Math.min(x1, x2), Math.min(y1, y2), Math.max(Math.abs(x1 - x2), Math.abs(y1 - y2)), Math.max(Math.abs(x1 - x2), Math.abs(y1 - y2))); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; /** * 定义一个fillCircle类，继承Shape类，用于绘制一个填充实心圆 * @author 沈仕瑞 * */ public class FillCircle extends Shape{ /** * */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.fillOval(Math.min(x1, x2), Math.min(y1, y2), Math.max(Math.abs(x1 - x2), Math.abs(y1 - y2)), Math.max(Math.abs(x1 - x2), Math.abs(y1 - y2))); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class FillOval extends Shape { /** * 定义一个fillOVal类，继承Shape类，用于绘制一个填充椭圆 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.fillOval(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2)); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class FillRect extends Shape { /** * 定义一个fillRect类，继承Shape类，用于绘制一个填充矩形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.fillRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2)); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class FillRoundRect extends Shape { /** * 定义一个fillRoundRect类，继承Shape类，用于绘制一个填充圆角矩形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.fillRoundRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2), 50, 35); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Hexagon extends Shape { /** * 定义一个Hexagon类，继承Shape类，用于绘制一个六边形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); int[] x = { Math.min(x1, x2) + Math.abs(x1 - x2) / 4, Math.min(x1, x2), Math.min(x1, x2) + Math.abs(x1 - x2) / 4, Math.max(x1, x2) - Math.abs(x2 - x1) / 4, Math.max(x1, x2), Math.max(x1, x2) - Math.abs(x2 - x1) / 4 }; int[] y = { Math.min(y1, y2), (y1 + y2) / 2, Math.max(y1, y2), Math.max(y1, y2), (y1 + y2) / 2, Math.min(y1, y2) }; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawPolygon(x, y, 6); } } package com.edu.nwafu.shape; import java.awt.Graphics2D; public class Images extends Shape{ /** * */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g) { g.drawImage(image, 0, 0, board); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; public class Line extends Shape { /** * 定义一个Line类，继承Shape类，用于绘制一个填充椭圆 */ private static final long serialVersionUID = 1L; public Line() { } //重写父类的Draw方法，实现直线的绘制 public void draw(Graphics2D g) { g.setColor(color); g.setStroke(new BasicStroke(width)); g.drawLine(x1, y1, x2, y2); //System.out.println("line has finshed"); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Oval extends Shape{ /** * 定义一个OVal类，继承Shape类，用于绘制一个椭圆 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawOval(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2)); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Pencil extends Shape { /** * 定义一个Pencil类，继承Shape类，用于铅笔绘制 */ private static final long serialVersionUID = 1L; public Pencil(){ } public void draw(Graphics2D g) { g.setPaint(color); //为 Graphics2D 上下文设置 Stroke g.setStroke(new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL)); //为呈现算法设置单个首选项的值。 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.drawLine(x1, y1, x2, y2); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Pentagon extends Shape { /** * 定义一个Pentagon类，继承Shape类，用于绘制一个五边形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); int[] x = { (x1 + x2) / 2, Math.min(x1, x2), Math.min(x1, x2) + Math.abs(x1 - x2) / 4, Math.max(x1, x2) - Math.abs(x1 - x2) / 4, Math.max(x1, x2) }; int[] y = { Math.min(y1, y2), (int) (Math.min(y1, y2) + Math.abs(y1 - y2) / 2.5), Math.max(y1, y2), Math.max(y1, y2), (int) (Math.min(y1, y2) + Math.abs(y1 - y2) / 2.5) }; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawPolygon(x, y, 5); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Rectangle extends Shape { /** * 定义一个Rectangle类，继承Shape类，用于绘制一个矩形 */ private static final long serialVersionUID = 1L; public Rectangle(){ } public void draw(Graphics2D g2d) { g2d.setColor(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2)); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class RoundRect extends Shape { /** * 定义一个RoundRectangle类，继承Shape类，用于绘制一个圆角矩形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawRoundRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2), Math.abs(y1 - y2), 50, 35); } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Graphics2D; import java.awt.RenderingHints; /** * 橡皮檫类 * @author 沈仕瑞 * */ public class Rubber extends Shape { /** * BasicStroke的几个字段 * CAP_SQUARE 使用正方形结束未封闭的子路径和虚线线段， * 正方形越过线段端点，并延长等于线条宽度一半的距离。 * CAP_BUTT 无装饰地结束未封闭的子路径和虚线线段。 * CAP_ROUND 使用半径等于画笔宽度一半的圆形装饰结束未封闭的子路径和虚线线段。 * JOIN_BEVEL 通过直线连接宽体轮廓的外角，将路径线段连接在一起。 */ private static final long serialVersionUID = 1L; public Rubber(){ } public void draw(Graphics2D g) { g.setPaint(Color.white); g.setStroke(new BasicStroke(20, BasicStroke.CAP_SQUARE , BasicStroke.JOIN_BEVEL)); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.drawLine(x1, y1, x2, y2); } } package com.edu.nwafu.shape; import java.awt.Font; import java.awt.Graphics2D; public class Text extends Shape// 文字 { /** * 定义一个Text类，继承Shape类，用于文字输入 * */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g) { //Font(String name, int style, int size) g.setColor(color); g.setFont(new Font(fontName, italic+blodtype, fontSize)); if (s != null) { g.drawString(s, x1, y1); //System.out.println(fontName+" "+s+" "+fontSize ); } } } package com.edu.nwafu.shape; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.RenderingHints; public class Triangle extends Shape{ /** * 定义一个Triangle类，继承Shape类，用于绘制一个三角形 */ private static final long serialVersionUID = 1L; public void draw(Graphics2D g2d) { g2d.setPaint(color); g2d.setStroke(new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL)); int[] x = { (x1 + x2) / 2, x1, x2 }; int[] y = { y1, y2, y2 }; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawPolygon(x, y, 3); } } 五、图形资源
注：所有的图片资源等上传至GitHub中，点击https://github.com/HansGerry/Painting查看。
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