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Java 画图程序
一、 实验目的 了解面向对象的系统分析和建模方法， 掌握基于对象模型的程序设计方 法，掌握 java 绘图程序设计相关类的用法以及掌握 java 绘图程序设计相关 类的用法 二、 实验环境
网络计算机，JDK1.4，文本编辑工具(可以用 Windows 自带的记事本，UltraEdit 或 EditPlus 等)。

三

、 实验内容
设计一个简单的绘图程序，程序可以根据用户的请求绘制圆、矩形、直线等几何图 形，并且可以移动这些图形。要求建立这个画图程序的对象模型，集合图形的常用操作 比如绘制、移动等以多态方法提供，并且绘制的图形对象保存在数组或者集合对象中。

四、 实验方法和步骤
1．设计绘图系统的域模型，抽取图元超类和矩形、圆等子类。 2．设计绘图系统界面类从 Frame 派生子类，利用 Canvas 作为画布类并实现绘图。 3．建立域类包和界面类包。 4．设计域类。 5．设计界面类，实现界面上按钮操作功能

Java 源代码如下：
import import import import import import import import import import java.awt.*; java.awt.event.*; javax.swing.*; javax.swing.border.*; javax.swing.event.*; javax.imageio.ImageIO; java.io.*; java.awt.geom.*; java.awt.image.*; java.awt.font.*;

public class Painter extends JFrame implements ActionListener { private Container c = getContentPane(); private String menuBar[]={"文件(F)","编辑(E)","视图(V)","说明(H)"}; private String menuItem[][]={ {"新建(N)|78","打开(O)|79","保存(S)|83","另存为(A)","退出(X)|88"}, {"撤消(U)|90","重复(R)|89","剪切(T)|87","复制(C)|68","粘贴(P)|85"}, {"工具箱(T)|84","色块(C)|76","状态栏(S)","属性栏(M)"}, };

private JMenuItem jMenuItem[][]=new JMenuItem[4][5]; private JMenu jMenu[]; private JCheckBoxMenuItem jCheckBoxMenuItem[] = new JCheckBoxMenuItem[4]; private String ButtonName[]={"直线","矩开","椭圆","圆角矩形","贝氏曲线","扇 型","多边形","铅笔","橡皮擦","文字","选取"}; private JToggleButton jToggleButton[]; private ButtonGroup buttonGroup; private JPanel jPanel[]=new JPanel[5];//0 內層,1 繪圖區,2 工具箱,3 色塊,4 屬性 欄 private JLabel jLabel[]=new JLabel[1];//狀態列 private String toolname[]={"img/tool1.gif","img/tool2.gif","img/tool3.gif","img/tool4.gif","im g/tool5.gif","img/tool8.gif","img/tool9.gif","img/tool7.gif","img/tool6.gif","i mg/tool10.gif","img/tool11.gif"}; private Icon tool[]=new ImageIcon[11]; private int i,j,show_x,show_y,drawMethod=7,draw_panel_width=700,draw_panel_height=500; private Paint color_border,color_inside; private SetPanel setPanel; private DrawPanel drawPanel; private UnderDrawPanel underDrawPanel; private ColorPanel colorPanel; private Stroke stroke; private Shape shape; private String isFilled; //Download: public Painter(){ //設定 JMenuBar，並產生 JMenuItem、並設置快捷鍵 JMenuBar bar = new JMenuBar(); jMenu=new JMenu[menuBar.length]; for(i=0;i<menuBar.length;i++){ jMenu[i] = new JMenu(menuBar[i]); jMenu[i].setMnemonic(menuBar[i].split("\\(")[1].charAt(0)); bar.add(jMenu[i]); } for(i=0;i<menuItem.length;i++){ for(j=0;j<menuItem[i].length;j++){ if(i==0 && j==4 || i==1 && j==2) jMenu[i].addSeparator(); if(i!=2){ jMenuItem[i][j] = JMenuItem(menuItem[i][j].split("\\|")[0]); if(menuItem[i][j].split("\\|").length!=1)

new

jMenuItem[i][j].setAccelerator(KeyStroke.getKeyStroke(Integer.parseInt(menu Item[i][j].split("\\|")[1]), ActionEvent.CTRL_MASK) ); jMenuItem[i][j].addActionListener(this); jMenuItem[i][j].setMnemonic(menuItem[i][j].split("\\(")[1].charAt(0)); jMenu[i].add(jMenuItem[i][j]); } else{ jCheckBoxMenuItem[j] = JCheckBoxMenuItem(menuItem[i][j].split("\\|")[0]); if(menuItem[i][j].split("\\|").length!=1)

new

jCheckBoxMenuItem[j].setAccelerator(KeyStroke.getKeyStroke(Integer.parseInt (menuItem[i][j].split("\\|")[1]), ActionEvent.CTRL_MASK) ); jCheckBoxMenuItem[j].addActionListener(this); jCheckBoxMenuItem[j].setMnemonic(menuItem[i][j].split("\\(")[1].charAt(0)); jCheckBoxMenuItem[j].setSelected( true ); jMenu[i].add(jCheckBoxMenuItem[j]); } } } this.setJMenuBar( bar ); c.setLayout( new BorderLayout() ); for(i=0;i<5;i++) jPanel[i]=new JPanel(); jLabel[0]=new JLabel(" 狀態列"); buttonGroup = new ButtonGroup(); JToolBar jToolBar=new JToolBar("工具箱",JToolBar.VERTICAL); jToggleButton=new JToggleButton[ButtonName.length]; for(i=0;i<ButtonName.length;i++){ tool[i] = new ImageIcon(toolname[i]); jToggleButton[i] = new JToggleButton(tool[i]); jToggleButton[i].addActionListener( this ); jToggleButton[i].setFocusable( false ); buttonGroup.add(jToggleButton[i]); } jToolBar.add(jToggleButton[7]); jToolBar.add(jToggleButton[8]); jToolBar.add(jToggleButton[0]);

jToolBar.add(jToggleButton[4]); jToolBar.add(jToggleButton[1]); jToolBar.add(jToggleButton[3]); jToolBar.add(jToggleButton[2]); jToolBar.add(jToggleButton[5]); jToolBar.add(jToggleButton[6]); jToolBar.add(jToggleButton[9]); jToolBar.add(jToggleButton[10]); jToggleButton[7].setSelected(true); jToolBar.setLayout( new GridLayout( 6, 2, 2, 2 ) ); jPanel[2].add(jToolBar); jToolBar.setFloatable(false);//無法移動 colorPanel=new ColorPanel(); jPanel[3].setLayout(new FlowLayout(FlowLayout.LEFT)); jPanel[3].add(colorPanel); drawPanel=new DrawPanel(); underDrawPanel=new UnderDrawPanel(); underDrawPanel.setLayout(null); underDrawPanel.add(drawPanel); drawPanel.setBounds(new Rectangle(2, draw_panel_height)); setPanel=new SetPanel(); jPanel[4].add(setPanel); jPanel[0].setLayout( new BorderLayout() ); jPanel[0].add(underDrawPanel,BorderLayout.CENTER); jPanel[0].add(jPanel[2],BorderLayout.WEST); jPanel[0].add(jPanel[3],BorderLayout.SOUTH); jPanel[0].add(jPanel[4],BorderLayout.EAST);

2,

draw_panel_width,

jLabel[0].setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED)); underDrawPanel.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERE D)); underDrawPanel.setBackground(new Color(128,128,128)); jPanel[3].setBorder(BorderFactory.createMatteBorder(1,0,0,0,new Color(172,168,153))); c.add(jPanel[0],BorderLayout.CENTER);

c.add(jLabel[0],BorderLayout.SOUTH); setSize(draw_panel_width,draw_panel_height); setTitle("小画家"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); show(); } public void save(){ FileDialog fileDialog = new FileDialog( new Frame() , "请指定一个文件名 ", FileDialog.SAVE ); fileDialog.show(); if(fileDialog.getFile()==null) return; drawPanel.filename = fileDialog.getDirectory()+fileDialog.getFile(); } public void actionPerformed( ActionEvent e ){ for(i=0;i<ButtonName.length;i++){ if(e.getSource()==jToggleButton[i]){ drawMethod=i; if(drawMethod==5) setPanel.pie_add_ctrl(); else setPanel.pie_remove_ctrl(); if(drawMethod==7 || drawMethod==8) setPanel.pencil_add_ctrl(); else setPanel.pencil_remove_ctrl(); drawPanel.clear(); drawPanel.repaint(); jMenuItem[1][2].setEnabled(false); jMenuItem[1][3].setEnabled(false); } } if(e.getSource()==jMenuItem[1][0]){ drawPanel.undo(); } else if(e.getSource()==jMenuItem[1][1]){ drawPanel.redo(); } else if(e.getSource()==jMenuItem[1][2]){ drawPanel.cut(); } else if(e.getSource()==jMenuItem[1][3]){

drawPanel.copy(); } else if(e.getSource()==jMenuItem[1][4]){ drawPanel.paste(); } else if(e.getSource()==jMenuItem[0][0]){//開新檔案 underDrawPanel.remove(drawPanel); drawPanel=null; drawPanel=new DrawPanel(); underDrawPanel.add(drawPanel); drawPanel.setBounds(new Rectangle(2, 2, draw_panel_height));

draw_panel_width,

underDrawPanel.ctrl_area.setLocation(draw_panel_width+3,draw_panel_height+3 ); underDrawPanel.ctrl_area2.setLocation(draw_panel_width+3,draw_panel_height/ 2+3); underDrawPanel.ctrl_area3.setLocation(draw_panel_width/2+3,draw_panel_heigh t+3); repaint(); } else if(e.getSource()==jMenuItem[0][1]){//開啟舊檔 FileDialog fileDialog = new FileDialog( new Frame() , "選擇一個圖檔 ", FileDialog.LOAD ); fileDialog.show(); if(fileDialog.getFile()==null) return; underDrawPanel.removeAll(); drawPanel=null; drawPanel=new DrawPanel(); underDrawPanel.add(drawPanel); drawPanel.setBounds(new Rectangle(2, draw_panel_height));

2,

draw_panel_width,

drawPanel.openfile(fileDialog.getDirectory()+fileDialog.getFile()); } else if(e.getSource()==jMenuItem[0][2]){//儲存檔案 if(drawPanel.filename==null){ save(); } else{ try{

int dotpos = drawPanel.filename.lastIndexOf('.'); ImageIO.write(drawPanel.bufImg, drawPanel.filename.substring(dotpos + 1), new File(drawPanel.filename)); } catch(IOException even) { JOptionPane.showMessageDialog(null, even.toString(),"無法儲 存圖檔", JOptionPane.ERROR_MESSAGE); } } } else if(e.getSource()==jMenuItem[0][3]){//另存新檔 save(); try{ int dotpos = drawPanel.filename.lastIndexOf('.'); ImageIO.write(drawPanel.bufImg, drawPanel.filename.substring(dotpos + 1), new File(drawPanel.filename)); } catch(IOException even) { JOptionPane.showMessageDialog(null, even.toString(),"無法儲存圖 檔", JOptionPane.ERROR_MESSAGE); } } else if(e.getSource()==jMenuItem[0][4]){//離開 System.exit(0); } for(i=0;i<2;i++){ if(jCheckBoxMenuItem[i].isSelected()) jPanel[i+2].setVisible( true ); else jPanel[i+2].setVisible( false ); } if(jCheckBoxMenuItem[3].isSelected()){ setPanel.setVisible( true ); jPanel[4].setVisible( true ); } else{ setPanel.setVisible( false ); jPanel[4].setVisible( false ); } if(jCheckBoxMenuItem[2].isSelected()) jLabel[0].setVisible( true ); else jLabel[0].setVisible( false ); }

public class UnderDrawPanel extends JPanel MouseMotionListener{ public int x,y; float data[]={2}; public JPanel ctrl_area=new JPanel(),ctrl_area3=new JPanel(); public UnderDrawPanel(){ this.setLayout(null); this.add(ctrl_area); this.add(ctrl_area2); this.add(ctrl_area3);

implements

MouseListener,

JPanel(),ctrl_area2=new

ctrl_area.setBounds(new Rectangle(draw_panel_width+3, draw_panel_height+3, 5, 5)); ctrl_area.setBackground(new Color(0,0,0)); ctrl_area2.setBounds(new Rectangle(draw_panel_width+3, draw_panel_height/2, 5, 5)); ctrl_area2.setBackground(new Color(0,0,0)); ctrl_area3.setBounds(new Rectangle(draw_panel_width/2, draw_panel_height+3, 5, 5)); ctrl_area3.setBackground(new Color(0,0,0)); ctrl_area.addMouseListener(this); ctrl_area.addMouseMotionListener(this); ctrl_area2.addMouseListener(this); ctrl_area2.addMouseMotionListener(this); ctrl_area3.addMouseListener(this); ctrl_area3.addMouseMotionListener(this); } public void mouseClicked(MouseEvent e){} public void mousePressed(MouseEvent e){} public void mouseReleased(MouseEvent e){ draw_panel_width=x; draw_panel_height=y; ctrl_area.setLocation(draw_panel_width+3,draw_panel_height+3); ctrl_area2.setLocation(draw_panel_width+3,draw_panel_height/2+3); ctrl_area3.setLocation(draw_panel_width/2+3,draw_panel_height+3); drawPanel.setSize(x,y); drawPanel.resize(); repaint(); }

public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mouseDragged(MouseEvent e){ if(e.getSource()==ctrl_area2){ x = e.getX()+draw_panel_width; y = draw_panel_height; } else if(e.getSource()==ctrl_area3){ x = draw_panel_width; y = e.getY()+draw_panel_height; } else{ x = e.getX()+draw_panel_width; y = e.getY()+draw_panel_height; } repaint(); jLabel[0].setText(x+","+y); } public void mouseMoved(MouseEvent e) {} public void paint(Graphics g) { Graphics2D g2d = (Graphics2D) g; super.paint(g2d); g2d.setPaint( new Color(128,128,128) ); g2d.setStroke( new BasicStroke( 1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER, 10, data, 0 ) ); g2d.draw( new Rectangle2D.Double( -1, -1, x+3, y+3 ) ); } } public class SetPanel extends JPanel implements ItemListener, ChangeListener, ActionListener{ private JPanel jPanel_set1=new JPanel(); private JPanel jPanel_set2=new JPanel(); private JPanel temp0=new JPanel(new GridLayout(4,1)), temp1=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp2=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp3=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp4=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp5=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp6=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp7=new JPanel(new FlowLayout(FlowLayout.LEFT)), temp8=new JPanel(new GridLayout(3,1));

public JCheckBox jCheckBox = new JCheckBox(); private BufferedImage bufImg = new BufferedImage(50 ,50,BufferedImage.TYPE_3BYTE_BGR); private JLabel jlbImg=new JLabel(); float data[]={20}; JLabel pie[]=new JLabel[3]; public int number=5; JSpinner lineWidthSelect = new JSpinner(); JRadioButton style[] = new JRadioButton[ 5 ]; ButtonGroup styleGroup = new ButtonGroup() ,pieGroup = new ButtonGroup(); public SetPanel(){//產生版面// this.setLayout(null); this.add(jPanel_set1); jlbImg.setIcon(new ImageIcon(bufImg)); jPanel_set1.setLayout(new FlowLayout()); jPanel_set1.setBounds(new Rectangle(0, 0, 100, 160)); jPanel_set1.setBorder( new TitledBorder(null, ",TitledBorder.LEFT, TitledBorder.TOP) ); lineWidthSelect.setValue(new Integer(5)); for(i=0;i<=1;i++){ style[i] = new JRadioButton(); styleGroup.add(style[i]); style[i].addActionListener(this); } style[0].setSelected( true ); temp1.add(new JLabel("大小:")); temp1.add(lineWidthSelect); temp2.add(new JLabel("虛线:")); temp2.add(jCheckBox); temp3.add(new JLabel("圆角:")); temp3.add(style[0]); temp4.add(new JLabel("尖角:")); temp4.add(style[1]); temp0.add(temp1); temp0.add(temp2);

"

边

框

temp0.add(temp3); temp0.add(temp4); jPanel_set1.add(temp0); lineWidthSelect.addChangeListener( this ); jCheckBox.addItemListener( this ); jPanel_set2.setBounds(new Rectangle(0, 170, 100, 130)); jPanel_set2.setBorder( new TitledBorder(null, " 扇 型 设 定 ",TitledBorder.LEFT, TitledBorder.TOP) ); for(i=2;i<=4;i++){ style[i] = new JRadioButton(); pieGroup.add(style[i]); style[i].addActionListener(this); } style[4].setSelected( true ); pie[0] = new JLabel("弦状:"); temp5.add(pie[0]); temp5.add(style[2]); pie[1] = new JLabel("开放:"); temp6.add(pie[1]); temp6.add(style[3]); pie[2] = new JLabel("派状:"); temp7.add(pie[2]); temp7.add(style[4]); temp8.add(temp5); temp8.add(temp6); temp8.add(temp7); temp8.setPreferredSize(new Dimension( 71 , 95 )); jPanel_set2.add(temp8); this.add(jPanel_set2); pie_remove_ctrl(); stroke = new BasicStroke.JOIN_MITER); }

BasicStroke(5,

BasicStroke.CAP_ROUND,

public void pencil_add_ctrl(){ style[0].setSelected(true); style[1].setEnabled(false); jCheckBox.setSelected(false); jCheckBox.setEnabled(false); BasicStroke stroke2 = (BasicStroke) stroke; stroke = new BasicStroke(stroke2.getLineWidth(), BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER); } public void pencil_remove_ctrl(){ style[1].setEnabled(true); jCheckBox.setEnabled(true); } public void pie_add_ctrl(){ pie[0].setEnabled(true); pie[1].setEnabled(true); pie[2].setEnabled(true); style[2].setEnabled(true); style[3].setEnabled(true); style[4].setEnabled(true); } public void pie_remove_ctrl(){ pie[0].setEnabled(false); pie[1].setEnabled(false); pie[2].setEnabled(false); style[2].setEnabled(false); style[3].setEnabled(false); style[4].setEnabled(false); } public void actionPerformed( ActionEvent e ){ BasicStroke stroke2 = (BasicStroke) stroke; if ( e.getSource() == style[0] ) stroke = new BasicStroke( stroke2.getLineWidth(), BasicStroke.CAP_ROUND, stroke2.getLineJoin(), stroke2.getMiterLimit(), stroke2.getDashArray(), stroke2.getDashPhase() ); else if ( e.getSource() == style[1] ) stroke = new BasicStroke( stroke2.getLineWidth(), BasicStroke.CAP_BUTT, stroke2.getLineJoin(), stroke2.getMiterLimit(), stroke2.getDashArray(), stroke2.getDashPhase() ); else if ( e.getSource() == style[2] )

drawPanel.pie_shape=Arc2D.CHORD; else if ( e.getSource() == style[3] ) drawPanel.pie_shape=Arc2D.OPEN; else if ( e.getSource() == style[4] ) drawPanel.pie_shape=Arc2D.PIE; } public void stateChanged(ChangeEvent e){ number = Integer.parseInt(lineWidthSelect.getValue().toString()); if(number <= 0) { lineWidthSelect.setValue(new Integer(1)); number = 1; } BasicStroke stroke2 = (BasicStroke) stroke; stroke = new BasicStroke( number, stroke2.getEndCap(), stroke2.getLineJoin(), stroke2.getMiterLimit(), stroke2.getDashArray(), stroke2.getDashPhase() ); } public void itemStateChanged( ItemEvent e ){ BasicStroke stroke2 = (BasicStroke) stroke; if ( e.getSource() == jCheckBox ){ if ( e.getStateChange() == ItemEvent.SELECTED ) stroke = new BasicStroke( stroke2.getLineWidth(), stroke2.getEndCap(), stroke2.getLineJoin(), 10, data, 0 ); else stroke = new BasicStroke( stroke2.getLineWidth(), stroke2.getEndCap(), stroke2.getLineJoin()); } } public Dimension getPreferredSize(){ return new Dimension( 100, 300 ); } } public class Gradient extends JPanel{//漸層預覽用 public Color G_color_left = new Color(255,255,255); public Color G_color_right = new Color(0,0,0); public Gradient(){ repaint(); }

public void paint(Graphics g) { Graphics2D g2d = (Graphics2D) g; g2d.setPaint( new GradientPaint( 0, 0, G_color_left, 100, 0, G_color_right, true ) ); g2d.fill( new Rectangle2D.Double( 0, 0, 100, 25 ) ); } public Dimension getPreferredSize(){ return new Dimension( 100, 25 ); } } public class ColorPanel extends JPanel MouseListener,ActionListener{//調色盤 class private JPanel jPanel_color0[]=new JPanel[5]; private JPanel jPanel_color1[]=new JPanel[32]; private JPanel jPanel_color2[]=new JPanel[32]; private ImageIcon special_color[]= new ImageIcon[4]; private BufferedImage bufImg = BufferedImage(12 ,12,BufferedImage.TYPE_3BYTE_BGR) ,bufImg2 BufferedImage(12 ,12,BufferedImage.TYPE_3BYTE_BGR); private JLabel jlbImg=new JLabel() ,jlbImg2=new JLabel(); private ImageIcon icon; private JDialog jDialog; private JButton ok, cancel,left,right; private Gradient center = new Gradient(); implements

=

new new

private int rgb[][]={ {0,255,128,192,128,255,128,255, 0, 0, 0, 0, 0, 0,128,255,128,255, 0, 0, 0,128, 0,128,128,255,128,255,255,255,255,255}, {0,255,128,192, 0, 0,128,255,128,255,128,255, 0, 0, 0, 0,128,255, 64,255,128,255, 64,128, 0, 0, 64,128,255,255,255,255}, {0,255,128,192, 0, 0, 0, 0, 0, 0,128,255,128,255,128,255, 64,128, 64,128,255,255,128,255,255,128, 0, 64,255,255,255,255} }; public ColorPanel(){//產生版面// addMouseListener( this ); jlbImg.setIcon(new ImageIcon(bufImg)); jlbImg2.setIcon(new ImageIcon(bufImg2)); special_color[0] = new ImageIcon( "img/icon1.gif" ); special_color[1] = new ImageIcon( "img/icon2.gif" );

special_color[2] = new ImageIcon( "img/icon3.gif" ); special_color[3] = new ImageIcon( "img/icon4.gif" ); this.setLayout(null); color_border=new Color(0,0,0); color_inside=null; for(i=0;i<jPanel_color0.length;i++){ jPanel_color0[i]=new JPanel(); if(i<=2){ jPanel_color0[i].setBorder(BorderFactory.createEtchedBorder(BevelBorder.RAI SED)); jPanel_color0[i].setLayout(null); } else{ jPanel_color0[i].setBackground(new Color(rgb[0][i-3],rgb[1][i-3],rgb[2][i-3])); jPanel_color0[i].setLayout(new GridLayout(1,1)); jPanel_color0[i-2].add(jPanel_color0[i]); } } for(i=0;i<jPanel_color2.length;i++){ jPanel_color2[i]=new JPanel(); jPanel_color2[i].setLayout(new GridLayout(1,1)); jPanel_color2[i].setBounds(new Rectangle(2, 2, 12, 12)); jPanel_color2[i].setBackground(new Color(rgb[0][i],rgb[1][i],rgb[2][i])); if(i>=28) jPanel_color2[i].add(new JLabel(special_color[i-28])); } for(i=0;i<jPanel_color1.length;i++){ jPanel_color1[i]=new JPanel(); jPanel_color1[i].setLayout(null); jPanel_color1[i].add(jPanel_color2[i]); this.add(jPanel_color1[i]); if(i%2==0){jPanel_color1[i].setBounds(new Rectangle(32+i/2*16, 0, 16, 16));} else{jPanel_color1[i].setBounds(new Rectangle(32+i/2*16, 16, 16, 16));} jPanel_color1[i].setBorder(BorderFactory.createEtchedBorder(BevelBorder.RAI SED));

} jPanel_color0[3].add(jlbImg); jPanel_color0[4].add(jlbImg2); Graphics2D g2d = bufImg2.createGraphics(); g2d.setPaint( Color.white ); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) ); g2d.setPaint( Color.red ); g2d.draw( new Line2D.Double( 0, 0, 12, 12 ) ); g2d.draw( new Line2D.Double( 11, 0, 0, 11 ) ); repaint(); this.add(jPanel_color0[1]); this.add(jPanel_color0[2]); this.add(jPanel_color0[0]); jPanel_color0[0].setBounds(new jPanel_color0[1].setBounds(new jPanel_color0[2].setBounds(new jPanel_color0[3].setBounds(new jPanel_color0[4].setBounds(new Rectangle(0, 0, 32, Rectangle(4, 4, 16, Rectangle(12,12,16, Rectangle(2, 2, 12, Rectangle(2, 2, 12, 32)); 16)); 16)); 12)); 12));

jDialog = new JDialog(Painter.this, "請選擇兩種顏色做漸層", true); jDialog.getContentPane().setLayout(new FlowLayout()); jDialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE ); jDialog.setSize(250, 110); JPanel temp = new JPanel(new GridLayout(2,1)); JPanel up = new JPanel(new FlowLayout()); JPanel down = new JPanel(new FlowLayout()); ok = new JButton("確定"); cancel = new JButton("取消"); left = new JButton(" "); right = new JButton(" "); center.setBorder(BorderFactory.createEtchedBorder(BevelBorder.RAISED)); up.add(left); up.add(center); up.add(right); down.add(ok); down.add(cancel); temp.add(up);

temp.add(down); jDialog.getContentPane().add(temp); ok.addActionListener(this); cancel.addActionListener(this); left.addActionListener(this); right.addActionListener(this); } public void actionPerformed( ActionEvent e ){ if(e.getSource() == left){ center.G_color_left = JColorChooser.showDialog( Painter.this, " 請選擇邊線顏色", center.G_color_left ); center.repaint(); } else if(e.getSource() == right){ center.G_color_right = JColorChooser.showDialog( Painter.this, " 請選擇邊線顏色", center.G_color_right ); center.repaint(); } else{ jDialog.dispose(); } } public Dimension getPreferredSize(){ return new Dimension( 300, 32 ); } public void mouseClicked( MouseEvent e ){} public void mousePressed( MouseEvent e ){ Graphics2D g2d; if(e.getX()>=5 && e.getX()<=20 && e.getY()>=5 && e.getY()<=20){ g2d = bufImg.createGraphics(); color_border = JColorChooser.showDialog( Painter.this, "請選擇邊 線顏色", (Color)color_border ); g2d.setPaint(color_border); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) ); repaint(); } else if(e.getX()>=13 && e.getX()<=28 && e.getY()>=13 && e.getY()<=28){ g2d = bufImg2.createGraphics(); color_inside = JColorChooser.showDialog( Painter.this, "請選擇填 充顏色", (Color)color_inside ); g2d.setPaint(color_inside); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) );

repaint(); } if(!(e.getX()>=32 && e.getX()<=288)) return; int choose=(e.getX()-32)/16*2+e.getY()/16; if(e.getButton()==1)//判斷填充邊框或填滿內部 g2d = bufImg.createGraphics(); else g2d = bufImg2.createGraphics(); if(choose==28){//填充無顏色 g2d.setPaint( Color.white ); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) ); g2d.setPaint( Color.red ); g2d.draw( new Line2D.Double( 0, 0, 12, 12 ) ); g2d.draw( new Line2D.Double( 11, 0, 0, 11 ) ); repaint(); if(e.getButton()==1) color_border=null; else color_inside=null; } else if(choose==29){//填充漸層 jDialog.show(); g2d.setPaint( new GradientPaint( 0, 0, center.G_color_left, 12, 12, center.G_color_right, true ) ); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) ); repaint(); if(e.getButton()==1) color_border=new GradientPaint( 0, 0, center.G_color_left, 12, 12, center.G_color_right, true ); else color_inside=new GradientPaint( 0, 0, center.G_color_left, 12, 12, center.G_color_right, true ); } else if(choose==30){//填充圖案 FileDialog fileDialog = new FileDialog( new Frame() , "選擇一個 圖檔", FileDialog.LOAD );//利用 FileDialog 抓取檔名 fileDialog.show();//秀出視窗 if(fileDialog.getFile()==null) return;//按取消的處理

g2d.drawImage(special_color[2].getImage(), 0, 0,this);//把調色盤 左方換成『圖片』 icon = new ImageIcon(fileDialog.getDirectory()+fileDialog.getFile());//利用 FileDialog 傳進 來的檔名讀取圖片 BufferedImage bufferedImage = new BufferedImage(icon.getIconWidth(),icon.getIconHeight(),BufferedImage.TYPE_3BYTE _BGR);//創一張新的 BufferedImage，為了要讀取讀進來的圖片長寬，以免有空白 bufferedImage.createGraphics().drawImage(icon.getImage(),0,0,this);// icon 畫到 BufferedImage 上 repaint();//重繪螢幕 把

if(e.getButton()==1)//判斷邊線顏色或內部填滿色 color_border=new TexturePaint(bufferedImage, new Rectangle( icon.getIconWidth(), icon.getIconHeight() ) );//把這張 BufferedImage 設成 TexturePaint 來填滿 else color_inside=new TexturePaint(bufferedImage, new Rectangle( icon.getIconWidth(), icon.getIconHeight() ) ); } else if(choose==31){//填充文字 String text=JOptionPane.showInputDialog("請輸入文字","文字");// 輸入文字 if(text==null) return;//按取消時的處理 Color FontColor=new Color(0,0,0);//給這個字顏色 FontColor = JColorChooser.showDialog( Painter.this, "請選擇一個 顏色當文字顏色", FontColor );//讓使用者選擇顏色 g2d.drawImage(special_color[3].getImage(), 0, 0,this);//把調色盤 左方換成『字』 BufferedImage bufferedImage = new BufferedImage(draw_panel_width,draw_panel_height,BufferedImage.TYPE_3BYTE_BGR); //創一張新的 BufferedImage Graphics2D g2d_bufferedImage = bufferedImage.createGraphics();// 把 Graphics 拿出來畫 FontRenderContext frc g2d_bufferedImage.getFontRenderContext();//讀 Graphics 中的 Font Font f = new Font("新細明體",Font.BOLD,10);//新 Font =

TextLayout tl = new TextLayout(text, f, frc);//創新的 TextLayout， 並利用 f(Font)跟畫至於 frc(FontRenderContext) int sw = (int) (tl.getBounds().getWidth()+tl.getCharacterCount());//計算 TextLayout 的長 int sh = (int) (tl.getBounds().getHeight()+3);//計算 TextLayout 的高 bufferedImage = new BufferedImage(sw,sh,BufferedImage.TYPE_3BYTE_BGR);//再創一張新的 BufferedImage， 這裡利用相同指標指向不同記憶體 g2d_bufferedImage = bufferedImage.createGraphics();// 拿 出 Graphics 來畫，前一張 BufferedImage 只是為了計算文字長度與高度，這樣才能完整填滿 g2d_bufferedImage.setPaint(Color.WHITE);//設定顏色為白色 g2d_bufferedImage.fill(new Rectangle(0,0,sw,sh));//畫一個填滿白 色矩型 g2d_bufferedImage.setPaint(FontColor);//設定顏色為之前選擇文字 顏色 g2d_bufferedImage.drawString(text,0,10);// 畫 一 個 BufferedImage 上 repaint();//更新畫面 if(e.getButton()==1)//判斷邊線顏色或內部填滿色 color_border=new TexturePaint(bufferedImage, Rectangle(sw,sh) );//把這張 BufferedImage 設成 TexturePaint 來填滿 else color_inside=new TexturePaint(bufferedImage, Rectangle(sw,sh) ); } else{//填充一般色 g2d.setPaint(new Color(rgb[0][choose],rgb[1][choose],rgb[2][choose])); g2d.fill( new Rectangle2D.Double( 0, 0, 12, 12 ) ); repaint(); if(e.getButton()==1) color_border=new Color(rgb[0][choose],rgb[1][choose],rgb[2][choose]); else color_inside=new Color(rgb[0][choose],rgb[1][choose],rgb[2][choose]); } } String 於

new

new

public void mouseReleased( MouseEvent e ){} public void mouseEntered( MouseEvent e ){} public void mouseExited( MouseEvent e ){} } public class DrawPanel extends JPanel implements MouseListener, MouseMotionListener, ItemListener, ActionListener, ChangeListener{//中央畫布 public BufferedImage bufImg;//記錄最新畫面，並在此上作畫 private BufferedImage bufImg_data[];//記錄所有畫出圖面，索引值越大越新， 最大為最新 private BufferedImage bufImg_cut; private ImageIcon img; private JLabel jlbImg; private int x1=-1,y1=-1,x2,y2,count,redo_lim,press,temp_x1,temp_y1,temp_x2,temp_y2,temp_x3, temp_y3,step,step_chk,step_arc,step_chk_arc,chk,first,click,cut; private Arc2D.Double arc2D = new Arc2D.Double();//扇型 private Line2D.Double line2D = new Line2D.Double();//直線 private Ellipse2D.Double ellipse2D = new Ellipse2D.Double();//橢圓 private Rectangle2D.Double rectangle2D = new Rectangle2D.Double();//矩型 private CubicCurve2D.Double cubicCurve2D = new CubicCurve2D.Double();// 貝氏曲線 private RoundRectangle2D.Double roundRectangle2D = new RoundRectangle2D.Double();//圓角矩型 private Polygon polygon;//多邊型 private float data[]={5}; private Rectangle2D.Double rectangle2D_select = new Rectangle2D.Double();//矩型 private Ellipse2D.Double ellipse2D_pan = new Ellipse2D.Double(); private BasicStroke basicStroke_pen = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER); private BasicStroke basicStroke_select = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER,10, data, 0); private double center_point_x; private double center_point_y; private double start; private double end; public String filename; private JTextField textField_font = new JTextField("Fixedsys",16), textField_word = new JTextField("JAVA",16); private int size=100; private JSpinner fontsize = new JSpinner(); private JDialog jDialog;

private JCheckBox bold, italic; private JButton ok, cancel; public int pie_shape=Arc2D.PIE; private int valBold = Font.BOLD; private int valItalic = Font.ITALIC; private int select_x,select_y,select_w,select_h; public void resize(){//改變大小 bufImg = new BufferedImage(draw_panel_width, draw_panel_height,BufferedImage.TYPE_3BYTE_BGR); jlbImg = new JLabel(new ImageIcon(bufImg));//在 JLabel 上放置 bufImg， 用來繪圖 this.removeAll(); this.add(jlbImg); jlbImg.setBounds(new Rectangle(0, 0, draw_panel_width, draw_panel_height)); //畫出原本圖形// Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); g2d_bufImg.setPaint(Color.white); g2d_bufImg.fill(new Rectangle2D.Double(0,0,draw_panel_width,draw_panel_height)); g2d_bufImg.drawImage(bufImg_data[count],0,0,this); //記錄可重做最大次數，並讓重做不可按// redo_lim=count++; jMenuItem[1][1].setEnabled(false); //新增一張 BufferedImage 型態至 bufImg_data[count]，並將 bufImg 繪製至 bufImg_data[count]// bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics(); g2d_bufImg_data.drawImage(bufImg,0,0,this); //判斷座標為新起點// press=0; //讓復原 MenuItem 可以點選// if(count>0) jMenuItem[1][0].setEnabled(true); }

public DrawPanel() { bufImg_data = new BufferedImage[1000]; bufImg = new BufferedImage(draw_panel_width, draw_panel_height,BufferedImage.TYPE_3BYTE_BGR); jlbImg = new JLabel(new ImageIcon(bufImg));//在 JLabel 上放置 bufImg， 用來繪圖 this.setLayout(null); this.add(jlbImg); jlbImg.setBounds(new draw_panel_height));

Rectangle(0,

0,

draw_panel_width,

jMenuItem[1][0].setEnabled(false); jMenuItem[1][1].setEnabled(false); jMenuItem[1][2].setEnabled(false); jMenuItem[1][3].setEnabled(false); jMenuItem[1][4].setEnabled(false); //畫出空白// Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); g2d_bufImg.setPaint(Color.WHITE); g2d_bufImg.fill(new Rectangle2D.Double(0,0,draw_panel_width,draw_panel_height)); bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics(); g2d_bufImg_data.drawImage(bufImg,0,0,this); //Font// jDialog = new JDialog(Painter.this, "請選擇文字、字型、大小與屬性", true); fontsize.setValue(new Integer(100)); bold = new JCheckBox( "粗體" ,true); italic = new JCheckBox( "斜體" ,true); ok = new JButton("確定"); cancel = new JButton("取消"); JPanel temp_0 = new JPanel(new GridLayout(5,1)); JPanel temp_1 = new JPanel(new FlowLayout(FlowLayout.LEFT)); JPanel temp_2 = new JPanel(new FlowLayout(FlowLayout.LEFT)); JPanel temp_3 = new JPanel(new FlowLayout(FlowLayout.LEFT)); JPanel temp_4 = new JPanel(new FlowLayout()); JPanel temp_5 = new JPanel(new FlowLayout(FlowLayout.LEFT));

Container jDialog_c = jDialog.getContentPane(); jDialog_c.setLayout(new FlowLayout()); jDialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE ); jDialog.setSize(250, 200); temp_5.add(new JLabel("文字:")); temp_5.add(textField_word); temp_1.add(new JLabel("字體:")); temp_1.add(textField_font); temp_2.add(new JLabel("大小:")); temp_2.add(fontsize); temp_3.add(new JLabel("屬性:")); temp_3.add(bold); temp_3.add(italic); temp_4.add(ok); temp_4.add(cancel); temp_0.add(temp_5); temp_0.add(temp_1); temp_0.add(temp_2); temp_0.add(temp_3); temp_0.add(temp_4); jDialog_c.add(temp_0); bold.addItemListener( this ); italic.addItemListener( this ); fontsize.addChangeListener( this ); ok.addActionListener(this); cancel.addActionListener(this); temp_0.setPreferredSize(new Dimension( 180 , 150 )); repaint(); addMouseListener(this); addMouseMotionListener(this); } public void stateChanged(ChangeEvent e){ size = Integer.parseInt(fontsize.getValue().toString()); if(size <= 0) { fontsize.setValue(new Integer(1)); size = 1; } } public void actionPerformed( ActionEvent e ){

jDialog.dispose(); } public void itemStateChanged( ItemEvent e ){ if ( e.getSource() == bold ) if ( e.getStateChange() == ItemEvent.SELECTED ) valBold = Font.BOLD; else valBold = Font.PLAIN; if ( e.getSource() == italic ) if ( e.getStateChange() == ItemEvent.SELECTED ) valItalic = Font.ITALIC; else valItalic = Font.PLAIN; } public Dimension getPreferredSize(){ return new Dimension( draw_panel_width, draw_panel_height ); } public void openfile(String filename){//開啟舊檔 Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); ImageIcon icon = new ImageIcon(filename); g2d_bufImg.drawImage(icon.getImage(),0,0,this); count++; bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics(); g2d_bufImg_data.drawImage(bufImg,0,0,this); repaint(); } public void undo(){//復原 count--; draw_panel_width=bufImg_data[count].getWidth(); draw_panel_height=bufImg_data[count].getHeight(); drawPanel.setSize(draw_panel_width,draw_panel_height); bufImg = new BufferedImage(draw_panel_width, draw_panel_height,BufferedImage.TYPE_3BYTE_BGR); jlbImg = new JLabel(new ImageIcon(bufImg));//在 JLabel 上放置 bufImg，

用來繪圖 this.removeAll(); this.add(jlbImg); jlbImg.setBounds(new draw_panel_height));

Rectangle(0,

0,

draw_panel_width,

Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); g2d_bufImg.setPaint(Color.white); g2d_bufImg.fill(new Rectangle2D.Double(0,0,draw_panel_width,draw_panel_height)); g2d_bufImg.drawImage(bufImg_data[count],0,0,this);

underDrawPanel.ctrl_area.setLocation(draw_panel_width+3,draw_panel_height+3 ); underDrawPanel.ctrl_area2.setLocation(draw_panel_width+3,draw_panel_height/ 2+3); underDrawPanel.ctrl_area3.setLocation(draw_panel_width/2+3,draw_panel_heigh t+3); underDrawPanel.x=draw_panel_width; underDrawPanel.y=draw_panel_height; if(count<=0) jMenuItem[1][0].setEnabled(false); jMenuItem[1][1].setEnabled(true); cut=3; repaint(); } public void redo(){//重做 count++; draw_panel_width=bufImg_data[count].getWidth(); draw_panel_height=bufImg_data[count].getHeight(); drawPanel.setSize(draw_panel_width,draw_panel_height); bufImg = new BufferedImage(draw_panel_width, draw_panel_height,BufferedImage.TYPE_3BYTE_BGR); jlbImg = new JLabel(new ImageIcon(bufImg));//在 JLabel 上放置 bufImg， 用來繪圖 this.removeAll();

this.add(jlbImg); jlbImg.setBounds(new draw_panel_height));

Rectangle(0,

0,

draw_panel_width,

Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); g2d_bufImg.setPaint(Color.white); g2d_bufImg.fill(new Rectangle2D.Double(0,0,draw_panel_width,draw_panel_height)); g2d_bufImg.drawImage(bufImg_data[count],0,0,this);

underDrawPanel.ctrl_area.setLocation(draw_panel_width+3,draw_panel_height+3 ); underDrawPanel.ctrl_area2.setLocation(draw_panel_width+3,draw_panel_height/ 2+3); underDrawPanel.ctrl_area3.setLocation(draw_panel_width/2+3,draw_panel_heigh t+3); underDrawPanel.x=draw_panel_width; underDrawPanel.y=draw_panel_height; if(redo_lim<count) jMenuItem[1][1].setEnabled(false); jMenuItem[1][0].setEnabled(true); cut=3; repaint(); } public void cut(){ bufImg_cut = new BufferedImage((int)rectangle2D_select.getWidth(), (int)rectangle2D_select.getHeight(), BufferedImage.TYPE_3BYTE_BGR); BufferedImage copy = bufImg.getSubimage((int)rectangle2D_select.getX(),(int)rectangle2D_select.getY( ),(int)rectangle2D_select.getWidth(),(int)rectangle2D_select.getHeight()); Graphics2D g2d_bufImg_cut = (Graphics2D) bufImg_cut.createGraphics(); g2d_bufImg_cut.drawImage(copy,0,0,this); Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); g2d_bufImg.setPaint(Color.WHITE); g2d_bufImg.fill(new Rectangle2D.Double((int)rectangle2D_select.getX(),(int)rectangle2D_select.getY( ),(int)rectangle2D_select.getWidth(),(int)rectangle2D_select.getHeight()));

redo_lim=count++; jMenuItem[1][1].setEnabled(false); //新增一張 BufferedImage 型態至 bufImg_data[count]，並將 bufImg 繪製至 bufImg_data[count]// bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics(); g2d_bufImg_data.drawImage(bufImg,0,0,this); //判斷座標為新起點// press=0; //讓復原 MenuItem 可以點選// if(count>0) jMenuItem[1][0].setEnabled(true); jMenuItem[1][2].setEnabled(false); jMenuItem[1][3].setEnabled(false); jMenuItem[1][4].setEnabled(true); cut=3; repaint(); } public void copy(){ bufImg_cut = new BufferedImage((int)rectangle2D_select.getWidth(), (int)rectangle2D_select.getHeight(), BufferedImage.TYPE_3BYTE_BGR); BufferedImage copy = bufImg.getSubimage((int)rectangle2D_select.getX(),(int)rectangle2D_select.getY( ),(int)rectangle2D_select.getWidth(),(int)rectangle2D_select.getHeight()); Graphics2D g2d_bufImg_cut = (Graphics2D) bufImg_cut.createGraphics(); g2d_bufImg_cut.drawImage(copy,0,0,this); jMenuItem[1][4].setEnabled(true); cut=1; repaint(); } public void paste(){ cut=2; repaint(); } public void mousePressed(MouseEvent e) { x1=e.getX(); y1=e.getY(); if(first==0){

polygon = new Polygon(); polygon.addPoint(x1, y1); first=1; } //判斷座標為新起點// press=1; chk=0; if(cut!=2) cut=0; } public void mouseReleased(MouseEvent e) { x2=e.getX(); y2=e.getY(); if(step_chk==0)//控制貝氏曲線用 step=1; else if(step_chk==1) step=2; if(step_chk_arc==0)//控制扇型用 chk=step_arc=1; else if(step_chk_arc==1) chk=step_arc=2; if(drawMethod==6 && click!=1){ polygon.addPoint(x2, y2); repaint(); } if(drawMethod==10){ if(cut!=2) cut=1; select_x=(int)rectangle2D_select.getX(); select_y=(int)rectangle2D_select.getY(); select_w=(int)rectangle2D_select.getWidth(); select_h=(int)rectangle2D_select.getHeight(); jMenuItem[1][2].setEnabled(true); jMenuItem[1][3].setEnabled(true); } if((step_chk==2 && step==2) || (step_chk_arc==2 && step_arc==2) || drawMethod==0 || drawMethod==1 || drawMethod==2 || drawMethod==3 || drawMethod==7 || drawMethod==8 || drawMethod==9 || cut==2){//當不是畫貝氏曲線或是已經完成貝氏 曲線時畫 toDraw(); }

} public void clear(){ cut=select_x=select_y=select_w=select_h=step_chk_arc=step_arc=first=step_ch k=step=0; x1=x2=y1=y2=-1; } public void toDraw(){ if(x1<0 || y1<0) return;//防止誤按 chk=3; draw(x1,y1,x2,y2); //畫出圖形至 bufImg// Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); if(cut!=2){ if(color_inside!=null && drawMethod!=8){ g2d_bufImg.setPaint(color_inside); g2d_bufImg.fill(shape); } if(color_border!=null && drawMethod!=8){ g2d_bufImg.setPaint(color_border); g2d_bufImg.setStroke(stroke); g2d_bufImg.draw(shape); } } else{ g2d_bufImg.drawImage(bufImg_cut,x2,y2,this); } repaint(); clear(); //記錄可重做最大次數，並讓重做不可按// redo_lim=count++; jMenuItem[1][1].setEnabled(false); //新增一張 BufferedImage 型態至 bufImg_data[count]，並將 bufImg 繪製至 bufImg_data[count]// bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics(); g2d_bufImg_data.drawImage(bufImg,0,0,this); //判斷座標為新起點//

press=0; //讓復原 MenuItem 可以點選// if(count>0) jMenuItem[1][0].setEnabled(true); } public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mouseClicked(MouseEvent e){ if(click==1){//連點兩下時 toDraw(); } click=1; } public void mouseDragged(MouseEvent e){ x2=e.getX(); y2=e.getY(); if(drawMethod==7 || drawMethod==8){ draw(x1,y1,x2,y2); x1=e.getX(); y1=e.getY(); } if(drawMethod!=9) repaint(); } public void mouseMoved(MouseEvent e) { show_x=x2=e.getX(); show_y=y2=e.getY(); jLabel[0].setText(show_x+","+show_y); click=0; if(drawMethod==7 || drawMethod==8 || cut==2) repaint(); } public void draw(int input_x1,int input_y1,int input_x2,int input_y2){ if(drawMethod==0){//直線時，讓 shape 為 Line2D shape=line2D; line2D.setLine(input_x1,input_y1,input_x2,input_y2); } else if(drawMethod==1){//矩型時，讓 shape 為 Rectangle2D

shape=rectangle2D; rectangle2D.setRect(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2) ,Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2)); } else if(drawMethod==2){//橢圓時 shape=ellipse2D; ellipse2D.setFrame(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2), Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2)); } else if(drawMethod==3){//圓角矩型 shape=roundRectangle2D; roundRectangle2D.setRoundRect(Math.min(input_x1,input_x2),Math.min(input_y1 ,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2),10.0f,10.0f) ; } else if(drawMethod==4){//貝氏曲線 shape=cubicCurve2D; if(step==0){ cubicCurve2D.setCurve(input_x1,input_y1,input_x1,input_y1,input_x2,input_y2 ,input_x2,input_y2); temp_x1=input_x1; temp_y1=input_y1; temp_x2=input_x2; temp_y2=input_y2; step_chk=0; } else if(step==1){ cubicCurve2D.setCurve(temp_x1,temp_y1,input_x2,input_y2,input_x2,input_y2,t emp_x2,temp_y2); temp_x3=input_x2; temp_y3=input_y2; step_chk=1; } else if(step==2){ cubicCurve2D.setCurve(temp_x1,temp_y1,temp_x3,temp_y3,input_x2,input_y2,tem p_x2,temp_y2); step_chk=2; }

} else if(drawMethod==5){//扇型，chk 用來防止意外的 repaint// if(step_arc==0 || chk==1){//步驟控制 shape=ellipse2D; ellipse2D.setFrame(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2), Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2)); temp_x1=input_x1; temp_y1=input_y1; temp_x2=input_x2; temp_y2=input_y2; step_chk_arc=0; } else if(step_arc==1 || chk==2){//步驟控制 shape=arc2D; center_point_x Math.min(temp_x1,temp_x2)+Math.abs(temp_x1-temp_x2)/2; center_point_y Math.min(temp_y1,temp_y2)+Math.abs(temp_y1-temp_y2)/2; = =

double a = Math.pow(Math.pow(input_x2-center_point_x,2)+Math.pow(input_y2-center_point_y,2 ),0.5); double b = input_x2-center_point_x; if(input_y2>center_point_y) start=360+Math.acos(b/a)/Math.PI*-180; else start=Math.acos(b/a)/Math.PI*180;

arc2D.setArc(Math.min(temp_x1,temp_x2),Math.min(temp_y1,temp_y2),Math.abs(t emp_x1-temp_x2),Math.abs(temp_y1-temp_y2),start,0,pie_shape); step_chk_arc=1; } else if(step_arc==2 || chk==3){//步驟控制 shape=arc2D; double a = Math.pow(Math.pow(input_x2-center_point_x,2)+Math.pow(input_y2-center_point_y,2 ),0.5); double b = input_x2-center_point_x; if(input_y2>center_point_y) end=360+Math.acos(b/a)/Math.PI*-180-start;

else end=Math.acos(b/a)/Math.PI*180-start; if(end<0){end=360-Math.abs(end);}

arc2D.setArc(Math.min(temp_x1,temp_x2),Math.min(temp_y1,temp_y2),Math.abs(t emp_x1-temp_x2),Math.abs(temp_y1-temp_y2),start,end,pie_shape); step_chk_arc=2; } } else if(drawMethod==6){//多邊型 shape=polygon; } else if(drawMethod==7 || drawMethod==8){//任意線＆橡皮擦 Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); shape=line2D; line2D.setLine(input_x1,input_y1,input_x2,input_y2); if(drawMethod==7) g2d_bufImg.setPaint(color_border); else g2d_bufImg.setPaint(Color.white); g2d_bufImg.setStroke(stroke); g2d_bufImg.draw(shape); } else if(drawMethod==9){//文字 Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics(); FontRenderContext frc = g2d_bufImg.getFontRenderContext(); jDialog.show(); Font f = new Font(textField_font.getText(),valBold + valItalic,size); TextLayout tl = new TextLayout(textField_word.getText(), f, frc); double sw = tl.getBounds().getWidth(); double sh = tl.getBounds().getHeight(); AffineTransform Tx = AffineTransform.getScaleInstance(1, 1); Tx.translate(input_x2,input_y2+sh); shape = tl.getOutline(Tx); } else if(drawMethod==10){//選取工具 shape=rectangle2D;

rectangle2D.setRect(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2) ,Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2)); } if(color_border instanceof GradientPaint){//使用漸層填色讀取拖拉座標 color_border = new GradientPaint( input_x1,input_y1, (Color)((GradientPaint)color_border).getColor1(), input_x2,input_y2, (Color)((GradientPaint)color_border).getColor2(), true ); } if(color_inside instanceof GradientPaint){ color_inside = new GradientPaint( input_x1,input_y1, (Color)((GradientPaint)color_inside).getColor1(), input_x2,input_y2, (Color)((GradientPaint)color_inside).getColor2(), true ); } } public void paint(Graphics g) { Graphics2D g2d = (Graphics2D) g; super.paint(g2d);//重繪底層 JPanel 以及上面所有元件 if(press==1 && drawMethod!=10 && !(x1<0 || y1<0)) {//繪圖在最上面的 JLabel 上，並判斷是不是起點才畫 draw(x1,y1,x2,y2); if(drawMethod==8) return; if(color_inside!=null){ g2d.setPaint(color_inside); g2d.fill(shape); } if(color_border!=null){ g2d.setPaint(color_border); g2d.setStroke(stroke); g2d.draw(shape); } } if(drawMethod==10 && cut==0){//選取控制、判斷是否選取、剪下、或貼上 g2d.setPaint(Color.black); g2d.setStroke(basicStroke_select); rectangle2D_select.setRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2), Math.abs(y1-y2)); g2d.draw(rectangle2D_select); } if(cut==1){ g2d.setPaint(Color.black);

g2d.setStroke(basicStroke_select); rectangle2D_select.setRect(select_x,select_y,select_w,select_h); g2d.draw(rectangle2D_select); } if(cut==2){ g2d.drawImage(bufImg_cut,x2,y2,this); } //跟隨游標的圓形// if(drawMethod==7 || drawMethod==8){ g2d.setPaint(Color.black); g2d.setStroke(basicStroke_pen); ellipse2D_pan.setFrame(x2-setPanel.number/2,y2-setPanel.number/2,setPanel.n umber,setPanel.number); g2d.draw(ellipse2D_pan); } } } public static void main( String args[] ){ try{UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());} catch(Exception e){e.printStackTrace();} Painter app = new Painter(); app.setVisible(true); app.setExtendedState(Frame.MAXIMIZED_BOTH); } }

绘图结果如下：