datadrawdemo.java

在Java中使用Draw2D和SWT绘图

import java.awt.*; 

import java.awt.event.*; 

import javax.swing.*; 

import javax.swing.event.*; 

import java.awt.geom.*; 



public class DataDrawDemo extends JFrame 

{ 

public JPanel contentPane; //控件容器 



JPanel jPanel1 = new JPanel();//绘图控件 



JButton jButton1 = new JButton(); 

JButton jButton2 = new JButton(); 

JButton jButton3 = new JButton(); 

JButton jButton4 = new JButton(); 

JButton jButton5 = new JButton(); 



JButton jButton6 = new JButton(); 

JButton jButton7 = new JButton(); 

JButton jButton8 = new JButton(); 

JButton jButton9 = new JButton(); 



JButton jButton10 = new JButton(); 



JTextField jText1=new JTextField(); 



JTextField jText2=new JTextField(); 



boolean kcu=true; 



//用户坐标转换对象 

myGraphicsData mp=new myGraphicsData(); 



//曲线转换对象 

GraphicsCurve gracu=new GraphicsCurve(); 





//窗口范围 

double wx1,wx2,wy1,wy2; 



//构造函数 

public DataDrawDemo() { 

enableEvents(AWTEvent.WINDOW_EVENT_MASK); 

try { 

jbInit(); 

} 

catch(Exception e) { 

e.printStackTrace(); 

} 

} 



//初始化代码 

private void jbInit() throws Exception { 





contentPane = (JPanel) this.getContentPane(); 

contentPane.setLayout(null); 



this.setSize(new Dimension(650, 500)); 

this.setTitle("Frame Title"); 

//contentPane.setSize(400,240); 

//jPanel1.setLayout(null); 



jPanel1.setBounds(0,90,650,420); 

jButton1.setBounds(new Rectangle(30, 20, 80, 25)); 

jButton1.setText("开始"); 



jButton1.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton1_actionPerformed(e); 

} 

}); 



jButton2.setBounds(new Rectangle(120, 20, 80, 25)); 

jButton2.setText("左移"); 



jButton2.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton2_actionPerformed(e); 

} 

}); 



jButton3.setBounds(new Rectangle(210, 20, 80, 25)); 

jButton3.setText("右移"); 



jButton3.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton3_actionPerformed(e); 

} 

}); 



jButton4.setBounds(new Rectangle(300, 20, 80, 25)); 

jButton4.setText("上移"); 



jButton4.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton4_actionPerformed(e); 

} 

}); 



jButton5.setBounds(new Rectangle(390, 20, 80, 25)); 

jButton5.setText("下移"); 



jButton5.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton5_actionPerformed(e); 

} 

}); 



jButton6.setBounds(new Rectangle(120, 50, 80, 25)); 

jButton6.setText("X扩"); 



jButton6.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton6_actionPerformed(e); 

} 

}); 



jButton7.setBounds(new Rectangle(210, 50, 80, 25)); 

jButton7.setText("X缩"); 



jButton7.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton7_actionPerformed(e); 

} 

}); 



jButton8.setBounds(new Rectangle(300, 50, 80, 25)); 

jButton8.setText("Y扩"); 



jButton8.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton8_actionPerformed(e); 

} 

}); 



jButton9.setBounds(new Rectangle(390, 50, 80, 25)); 

jButton9.setText("Y缩"); 



jButton9.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton9_actionPerformed(e); 

} 

}); 



//样条控制 

jButton10.setBounds(new Rectangle(30, 50, 80, 25)); 

jButton10.setText("样条"); 



jButton10.addActionListener(new java.awt.event.ActionListener() { 

public void actionPerformed(ActionEvent e) { 

jButton10_actionPerformed(e); 

} 

}); 



jText1.setBounds(new Rectangle(490, 20, 120, 20)); 

jText1.setText(""); 



jText2.setBounds(new Rectangle(490, 50, 120, 20)); 

jText2.setText(""); 





//鼠标按下侦听器 

jPanel1.addMouseListener(new java.awt.event.MouseAdapter(){ 

public void mousePressed(MouseEvent e) { 

JPanel_mousePressed(e); 



} 



}); 



//鼠标拖动侦听器 

jPanel1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter(){ 

public void mouseDragged(MouseEvent e){ 

JPanel_mouseDragged(e); 

} 

}); 





//鼠标释放侦听器 

jPanel1.addMouseListener(new java.awt.event.MouseAdapter(){ 

public void mouseReleased(MouseEvent e) { 

JPanel_mouseReleased(e); 

} 

}); 



contentPane.add(jPanel1, BorderLayout.CENTER); 



contentPane.add(jButton1, null); 

contentPane.add(jButton2, null); 

contentPane.add(jButton3, null); 

contentPane.add(jButton4, null); 

contentPane.add(jButton5, null); 

contentPane.add(jButton6, null); 

contentPane.add(jButton7, null); 

contentPane.add(jButton8, null); 

contentPane.add(jButton9, null); 

contentPane.add(jButton10, null); 

contentPane.add(jText1, null); 

contentPane.add(jText2, null); 

} 



public static void main(String[] args) { 



DataDrawDemo frame=new DataDrawDemo(); 

frame.show(); 

frame.gracu.myGraphics=(Graphics2D)frame.jPanel1.getGraphics(); 

frame.mp.myGraphics=(Graphics2D)frame.jPanel1.getGraphics(); 

frame.mp.myGraphics.setBackground(Color.white); 

frame.mp.myGraphics.clearRect(0,0,650,375); 

} 

//第一组数据 

double[] Xs1=new double[]{-2,2,4,6,8,10,12,14}; 

double[] Ys1=new double[]{-4,10,3,14,4,10,6,7}; 

//第二组数据 

double[] Xs2=new double[]{-1,2,4,6,8,10,12,14,16}; 

double[] Ys2=new double[]{1,5,7,1,13,11,4,10,8}; 

//这是一个画曲线的程序 

void DwData() 

{ 

//剪裁，可以试试没有剪裁是什么表现？ 

mp.myGraphics.clipRect(10,10,621,351); 

//由于是用两个对象绘图，所以应该分别剪切 

gracu.myGraphics.clipRect(10,10,621,351); 

//清除绘图空间 

mp.myGraphics.clearRect(0,0,650,375); 

//用户坐标和屏幕坐标转换 

mp.truemode(10,630,10,360,wx1,wx2,wy1,wy2); 

//设置颜色 

mp.myGraphics.setPaint(Color.darkGray); 

//画边框 

mp.myGraphics.drawRect(10,10,620,350); 

mp.myGraphics.setFont(new Font("宋体", 0, 10)); //9为字大小 

//画坐标 

mp.axis(2,2,2,2); 

//画红线 

int[] x=new int[Xs1.length]; 

int[] y=new int[Ys1.length]; 

int[] myxy; 

//统一实现坐标转换 

for (int i=0;i<x.length;i++) 

{ 

myxy=mp.moxy(Xs1[i],Ys1[i]); 

x[i]=myxy[0]; 

y[i]=myxy[1]; 

} 

if (kcu) 

{ 

mp.myGraphics.setPaint(Color.red); 

mp.myGraphics.drawPolyline(x,y,x.length); 

} 

else 

{ 

gracu.myGraphics.setPaint(Color.red); 

gracu.DrawCurves(x,y); 

} 

//画蓝线 

x=new int[Xs2.length]; 

y=new int[Ys2.length]; 

for (int i=0;i<x.length;i++) 

{ 

myxy=mp.moxy(Xs2[i],Ys2[i]); 

x[i]=myxy[0]; 

y[i]=myxy[1]; 

} 

if (kcu) 

{ 

mp.myGraphics.setPaint(Color.blue); 

mp.myGraphics.drawPolyline(x,y,x.length); 

} 

else 

{ 

gracu.myGraphics.setPaint(Color.blue); 

gracu.DrawCurves(x,y); 

} 

} 



//退出窗口事件 

protected void processWindowEvent(WindowEvent e) { 

super.processWindowEvent(e); 

if (e.getID() == WindowEvent.WINDOW_CLOSING) { 

System.exit(0); 

} 

} 



//鼠标按下事件 

void JPanel_mousePressed(MouseEvent e) 

{ 

double[] zs=mp.ScrtoCon(e.getX(),e.getY()); 

jText1.setText(String.valueOf((float)zs[0])); 

jText2.setText(String.valueOf((float)zs[1])); 

} 



//鼠标释放事件 

void JPanel_mouseReleased(MouseEvent e) 

{ 

double[] zs=mp.ScrtoCon(e.getX(),e.getY()); 

jText1.setText(""); 

jText2.setText(""); 



//画红线 

mp.myGraphics.setPaint(Color.darkGray); 

mp.myGraphics.drawLine(e.getX()-3,e.getY(),e.getX()+3,e.getY()); 

mp.myGraphics.drawLine(e.getX(),e.getY()-3,e.getX(),e.getY()+3); 

mp.myGraphics.drawString(String.valueOf((float)zs[0]),e.getX()+10,e.getY()); 

mp.myGraphics.drawString(String.valueOf((float)zs[1]),e.getX()+10,e.getY()+12); 

} 



//鼠标拖动事件 

void JPanel_mouseDragged(MouseEvent e) 

{ 

double[] zs=mp.ScrtoCon(e.getX(),e.getY()); 

jText1.setText(String.valueOf((float)zs[0])); 

jText2.setText(String.valueOf((float)zs[1])); 

} 



//开始 

void jButton1_actionPerformed(ActionEvent e){ 



wx1=1000000; 

wy1=1000000; 

wx2=-1000000; 

wy2=-1000000; 



//试验中数据来自一个数组，实际中可来自任何地方 

//设置初始范围 

for (int i=0;i<Xs1.length;i++) 

{ 

if (Xs1[i]< wx1) 

wx1=Xs1[i]; 

if (Xs1[i]> wx2) 

wx2=Xs1[i]; 



if (Ys1[i]< wy1) 

wy1=Ys1[i]; 

if (Ys1[i]> wy2) 

wy2=Ys1[i]; 

} 

for (int i=0;i<Xs2.length;i++) 

{ 

if (Xs2[i]< wx1) 

wx1=Xs2[i]; 

if (Xs2[i]> wx2) 

wx2=Xs2[i]; 

if (Ys2[i]< wy1) 

wy1=Ys2[i]; 

if (Ys2[i]> wy2) 

wy2=Ys2[i]; 

} 

DwData(); 

} 



//左移 

void jButton2_actionPerformed(ActionEvent e) { 



wx1-=1; 

wx2-=1; 

DwData(); 

} 



//右移 

void jButton3_actionPerformed(ActionEvent e) { 





wx1+=1; 

wx2+=1; 

DwData(); 

} 



//上移 

void jButton4_actionPerformed(ActionEvent e) { 



wy1-=1; 

wy2-=1; 

DwData(); 

} 



//下移 

void jButton5_actionPerformed(ActionEvent e) { 



wy1+=1; 

wy2+=1; 

DwData(); 

} 



//X扩 

void jButton6_actionPerformed(ActionEvent e) { 



wx1-=1; 

wx2+=1; 

DwData(); 

} 



//X缩 

void jButton7_actionPerformed(ActionEvent e) { 



wx1+=1; 

wx2-=1; 

DwData(); 

} 



//Y扩 

void jButton8_actionPerformed(ActionEvent e) { 



wy1-=1; 

wy2+=1; 

DwData(); 

} 



//Y缩 

void jButton9_actionPerformed(ActionEvent e) { 



wy1+=1; 

wy2-=1; 

DwData(); 

} 



//样条控制 

void jButton10_actionPerformed(ActionEvent e) { 



if (kcu) 

{ 

jButton10.setText("直线"); 

kcu=false; 

} 

else 

{ 

jButton10.setText("样条"); 

kcu=true; 

} 

DwData(); 

} 

} 



//图形处理类 

class myGraphicsData 

{ 

//屏幕坐标 

private int X11, Y11, X12, Y12; //x1,y1,x2,y2 

//用户坐标 

private double W1, W2, W3, W4; //x1,x2,y1,y2 

//绘图对象 

public Graphics2D myGraphics; 

double Ax8, Ay8; 

//用户窗口与屏幕窗口的转换 

//x1,x2,,y1,y2为屏幕坐标 

//wx1,wx2,wy1,wy2为用户坐标 



public void truemode(int x1, int x2, int y1,int y2, double wx1, double wx2, double wy1, double wy2) 

{ 

X11 = x1 ; X12 = x2; 

Y11 = y1 ; Y12 = y2; 

W1 = wx1 ; W2 = wx2; 

W3 = wy1 ; W4 = wy2; 

Ax8 = (X12 - X11) / (wx2 - wx1); 

Ay8 = (Y12 - Y11) / (wy2 - wy1); 

} 



//把用户坐标转为屏幕坐标 

public int[] moxy(double Xa, double Ya) 

{ 

int[] myout=new int[2]; 

myout[0] = (int)(Ax8 * (Xa - W1) + X11); 

myout[1] = (int)(Y12 - Ay8 * (Ya - W3)); 

return myout; 

} 



//把屏幕坐标转为用户坐标 

public double[] ScrtoCon(int X6, int Y6) 

{ 

double[] myout=new double[2]; 

myout[0] = (X6 - X11) / Ax8 + W1; 

myout[1] = (Y12 - Y6) / Ay8 + W3; 

return myout; 

} 



//画线 

public void Dline(double xa, double ya, double xb, double yb) 

{ 

try 

{ 

int x6, y6, x7, y7; 

x6 = (int)(Ax8 * (xa - W1) + X11); 

y6 = (int)(Y12 - Ay8 * (ya - W3)); 

x7 = (int)(Ax8 * (xb - W1) + X11); 

y7 = (int)(Y12 - Ay8 * (yb - W3)); 

myGraphics.drawLine(x6, y6, x7, y7); 

} 

catch(Exception e){} 

} 





//画坐标U,V为 X,Y轴单位,ns,nt为 x,y轴写字间隔 



public void axis(double u, double v, int ns, int nt) 

{ 

double p9, q9, s; 

int n2, swx,swy; 

int xk=0; 

int yk=0; 

double ge; 

int[] showxy=new int[2]; 

swx = 0; 

swy=4; 

ge = (double)0.008 * (W2 - W1); 

p9 = W1; 

q9 = (double)(W3 + (W4 - W3) * 0.05); 

if ((W1 < 0) && (W2 > 0)) p9 = 0; 

if ((W3 < 0) && (W4 > 0)) q9 = 0; 

Dline(p9, W3, p9, W4); 

n2 = 0; 

s = 0; 

while (s < W4) 

{ 

Dline(p9, s, p9 + ge, s); 

if (n2 >= nt) 

{ 

Dline(p9, s, p9 + ge + ge, s); 

n2 = 1; 

showxy=moxy(p9 + ge + ge,s); 

myGraphics.drawString(String.valueOf(s),showxy[0] - swx+4, showxy[1] - swy+4); 

} 

else 

{ 

n2++; 

} 

s += v; 

} 

//End While 

s = 0; 

n2 = 0; 

while (s > W3) 

{ 

Dline(p9, s, p9 + ge, s); 

if (n2 >= nt) 

{ 

Dline(p9, s, p9 + ge + ge, s); 

n2 = 1; 

showxy=moxy(p9 + ge + ge, s); 

myGraphics.drawString(String.valueOf(s),showxy[0] - swx+4, showxy[1] - swy+4); 

} 

else 

{ 

n2 ++; 

} 

s -= v; 

} 

//End While 

Dline(W1, q9, W2, q9); 

ge = (float)(0.008 * (W4 - W3)); 

n2 = 0; 

s = 0; 

while (s < W2) 

{ 

Dline(s, q9, s, q9 + ge); 

if (n2 >= ns) 

{ 

Dline(s, q9, s, q9 + ge + ge); 

n2 = 1; 

showxy=moxy(s, q9); 

myGraphics.drawString(String.valueOf(s),showxy[0] - swx, showxy[1] - swy-4); 

} 

else 

{ 

n2 ++; 

} 

s += u; 

} 

//End While 

s = 0; 

n2 =0 ; 

while (s > W1) 

{ 

Dline(s, q9, s, q9 + ge); 

if (n2 >= ns) 

{ 

Dline(s, q9, s, q9 + ge + ge); 

n2 = 1; 

showxy=moxy(s, q9); 

myGraphics.drawString(String.valueOf(s),showxy[0] - swx, showxy[1] - swy-4); 

} 

else 

{ 

n2 ++; 

} 

s -= u; 

} 

//End While 

} 

} 



// GraphicsCurve类与子定义样条曲线相同