绘图java程序报告（含程序）(4)

private JCheckBox c1; private JButton a,b; private int f=1; private int sx, sy, x,y; private boolean fill=false; private boolean flag=false; private Color c;

private Point point1=null,point2=null; private JSlider slider; private JLabel label1; private int size=10;

public DrawPanel() {

c =Color.black;

right = new JPanel(); left = new JPanel(); p1 = new JPanel();

ButtonGroup g = new ButtonGroup(); op1 = new JRadioButton(\曲线\ op2 = new JRadioButton(\直线\ op3 = new JRadioButton(\画圆\ op4 = new JRadioButton(\矩形\ op5 = new JRadioButton(\粗线\

g.add(op1); g.add(op2); g.add(op3);

g.add(op4); g.add(op5);

c1 = new JCheckBox(\填充\

a=new JButton(\颜色\ b=new JButton(\清除\

slider =new JSlider(JSlider.VERTICAL,0,25,10); slider.setMajorTickSpacing(5); slider.setMinorTickSpacing(1); slider.setPaintTicks(true); slider.setPaintLabels(true);

slider.setAlignmentX(Component.LEFT_ALIGNMENT);

label1 =new JLabel(\

label1.setAlignmentX(Component.LEFT_ALIGNMENT);

p1.setLayout(new BoxLayout(p1,BoxLayout.Y_AXIS));

p1.add(op1); p1.add(op2); p1.add(op3); p1.add(op4); p1.add(op5);

p1.add(c1);

c1.addActionListener(new listen3()); p1.add(a);

p1.add(Box.createRigidArea(new Dimension(0,10))); p1.add(b);

a.addActionListener(new listen4()); b.addActionListener(new listen5());

p1.add(slider);

slider.addChangeListener(new listen6()); p1.add(label1);

left.add(p1);

right.setBackground(Color.white);

op1.addActionListener(new listen2()); op2.addActionListener(new listen2()); op3.addActionListener(new listen2()); op4.addActionListener(new listen2()); op5.addActionListener(new listen2());

right.addMouseListener(new listen1()); right.addMouseMotionListener(new listen1());

setLayout(new BorderLayout()); add(right,\ add(left,\

setBackground(Color.white);

setPreferredSize(new Dimension(500,450)); }

private class listen1 implements MouseListener,MouseMotionListener {

public void mousePressed(MouseEvent event) {

flag=false;

point1=event.getPoint(); sx=point1.x; sy=point1.y ; }

public void mouseReleased(MouseEvent event) {

int x0,y0;

Graphics g=right.getGraphics();

switch(f){ case 2:

point2=event.getPoint(); x=point2.x; y=point2.y ; g.setColor(c); g.drawLine(sx,sy,x,y); break; case 3:

point2=event.getPoint();

x=point2.x; y=point2.y ; x0=x>sx?sx:x; y0=y>sy?sy:y; g.setColor(c); if(! fill)

g.drawOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy)); else

g.fillOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy)); break; case 4:

point2=event.getPoint(); x=point2.x; y=point2.y ; x0=x>sx?sx:x; y0=y>sy?sy:y; g.setColor(c); if(! fill)

g.drawRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy)); else

g.fillRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy)); break; } }

public void mouseEntered(MouseEvent event){} public void mouseExited(MouseEvent event){} public void mouseClicked(MouseEvent event){} public void mouseMoved(MouseEvent event){}