Java swing实现Visio中对直线、曲线、折线的画及拖动删除

原文：http://blog.csdn.net/cuiyaoqiang/article/details/46361133

Java swing实现Visio中对直线、曲线、折线的画及拖动删除
最终线条如图显示，可以实现线条的拖动、删除等

以下是两个核心的类：

package com.bh.realTimeMonitor.entity;
import java.awt.geom.GeneralPath;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import java.awt.geom.QuadCurve2D;
/**
 线条的实体类
 * @author 崔耀强 20150507-20150822
 * @version 1.1
 * */
public class Line {

public boolean isSelected;
public boolean isSelectP0; //选择线段的第一个端点
public boolean isSelectP1; //选择线段的另一个端点
public boolean isSelectP2; //选择线段的中间的端点
public double distance;    //实际线的长度
public double length;      //所画的线的长度
public GeneralPath shape;  //线的构造路径
private float len = 3.0f;  //线宽的改变主要靠该参数

private int id;
public  int startX,startY,endX,endY,middleX,middleY;
public  int lineShape;     //线形状 0直线1折线2曲线
public  float lineWidth = 0.6f; // 画笔宽
private LineType lineType;

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public   float getLen() {
return this.len;
}

public   void setLen(float len) {
this.len = len;
}

public double getDistance() {
return distance;
}

public void setDistance(double distance) {
this.distance = distance;
}

public LineType getLineType() {
return lineType;
}
public void setLineType(LineType lineType) {
this.lineType = lineType;
}


public int getStartX() {
return startX;
}

public void setStartX(int startX) {
this.startX = startX;
}

public int getStartY() {
return startY;
}

public void setStartY(int startY) {
this.startY = startY;
}

public int getEndX() {
return endX;
}

public void setEndX(int endX) {
this.endX = endX;
}

public int getEndY() {
return endY;
}

public void setEndY(int endY) {
this.endY = endY;
}

public int getMiddleX() {
return middleX;
}

public void setMiddleX(int middleX) {
this.middleX = middleX;
}

public int getMiddleY() {
return middleY;
}

public void setMiddleY(int middleY) {
this.middleY = middleY;
}

public int getLineShape() {
return lineShape;
}

public void setLineShape(int lineShape) {
this.lineShape = lineShape;
}

/**
 * @Description 构造线路径 ,Polyline 为0：直线；1折线；2：曲线
 * 可以使用的策略模式，针对不同的lineShape，分配不同的路径算法（降低耦合度）
 */
public void constructShape() {
//GeneralPath 类表示根据直线、二次曲线和三次 (Bézier) 曲线构造的几何路径
shape = new GeneralPath();

switch (lineShape) {
case 0://直线
straightLine();
break;
case 1://折线
polygonalLine();
break;
case 2://曲线
curveLine();
break;
default:
break;
}
}
/**
 * @Description 画曲线，曲线路径的定义
 */
private void curveLine() {

double[] px = new double[6];
double[] py = new double[6];
int a,b,c,d;
if(startY>=endY){
a = endX;
b = endY;
c = startX;
d = startY;
}else{
a = startX;
b = startY;
c = endX;
d = endY;
}  

px[0] = a;
py[0] = b;
px[4] = middleX;
py[4] = middleY;
px[1] = c;
py[1] = d;

double sina = (middleY-b)/Math.hypot(middleY-b,middleX-a);
double cosa=(middleX-a)/Math.hypot(middleY-b,middleX-a);
double cosa1=(a-middleX)/Math.hypot(middleY-b,middleX-a);
double sinb=(d-middleY)/Math.hypot(d-middleY,middleX-c);
double cosb=(middleX-c)/Math.hypot(d-middleY,middleX-c);
double cosb1=(c-middleX)/Math.hypot(d-middleY,c-middleX);
if(middleX>=a&&middleX<=c){

px[2] = c +len*sinb;
py[2] = d +len*cosb;
/*px[5] =(cosa*sinb*(c +len*sinb)+sina*cosb*(a+len*sina)-cosb*cosa*(b -len*cosa)+cosb*cosa*(d +len*cosb))/(cosa*sinb+sina*cosb); 
 py[5] = b -len*cosa+sina/cosa*(px[5]-a+len*sina);*/
px[5] = middleX+len*Math.sqrt(2)/2;
py[5] = middleY-len*Math.sqrt(2)/2; 
px[3] = a+len*sina;
py[3] = b -len*cosa;
}else if(middleX==a&&middleX>c){

px[2] = c;
py[2] = d-len ;
px[5] = middleX-len;  
py[5] = middleY-len;
px[3] = a -len;
py[3] = b;
} 
else {

px[2] = c-len* sinb;
py[2] = d+len*cosb1;
px[5] =(cosa1*cosb1*(b -len*cosa1)+cosb1*(a-len*sina)*sina-cosa1*cosb1*(d+len*cosb1)+cosa1*sinb*(c-len* sinb))/(cosa1*sinb+sina*cosb1);  
py[5] = ((a-len*sina)-px[5])*sina/cosa1+(b -len*cosa1); 
px[3] = a-len*sina;
py[3] = b -len*cosa1; 
} 
//二次曲线函数
QuadCurve2D.Double quadCurve2D_double1=new QuadCurve2D.Double(px[0], py[0],px[4], py[4], px[1], py[1]);
QuadCurve2D.Double quadCurve2D_double2=new QuadCurve2D.Double(px[2], py[2],px[5], py[5], px[3], py[3]);

shape=new GeneralPath(quadCurve2D_double1);
shape.lineTo(px[2], py[2]);
shape.append(quadCurve2D_double2,true);
shape.lineTo(px[0], py[0]);
shape.closePath();
/*int x=(int) (quadCurve2D_double1.getBounds2D().getCenterX());
int y = 0;
if(startX-2*middleX+endX!=0){
贝塞尔曲线
 * y=(1-t)^2P0+2t(1-t)P1+t^2P2
 * 
double t= (2*startX-2*middleX-Math.sqrt(4*(startX-middleX)*(startX-middleX)-4*(startX-2*middleX+endX)*(startX-x)))/(2*(startX-2*middleX+endX));
if(t>0&&t<1){
y =(int) ((1-t)*(1-t)*startY+2*t*(1-t)*middleY+t*t*endY);
}else{
double t1= (2*startX-2*middleX+Math.sqrt(4*(startX-middleX)*(startX-middleX)-4*(startX-2*middleX+endX)*(startX-x)))/(2*(startX-2*middleX+endX));
y =(int) ((1-t1)*(1-t1)*startY+2*t1*(1-t1)*middleY+t1*t1*endY);
}
}else{
y=(startY+endY)/2;
}*/
}

/**
 * @Description 画折线，折线路径的定义
 */
private void polygonalLine() {


double[] px = new double[6];
double[] py = new double[6];


if((startX>endX&&startY>endY)||(startX<endX&&startY<endY)){
px[0] = startX ;
py[0] = startY ;
px[5] = endX ;
py[5] = startY ;
px[1] = endX ;
py[1] = endY ;
px[2] = endX + len;
py[2] = endY ;
px[4] = endX + len;
py[4] = startY - len ;
px[3] = startX ;
py[3] = startY - len ;
}else{
px[0] = startX ;
py[0] = startY ;
px[5] = endX ;
py[5] = startY ;
px[1] = endX ;
py[1] = endY ;
px[2] = endX + len;
py[2] = endY ;
px[4] = endX + len;
py[4] = startY + len ;
px[3] = startX ;
py[3] = startY + len ;
}


startX=(int) px[0];
startY=(int) py[0];
endX=(int) px[1];
endY=(int) py[1];
middleX=(int) px[5];
middleY=(int) py[5];
/*
 *折线是否变成直线
 * 
 * x2=e;
 y2=f;*/
shape.moveTo(px[0], py[0]);//通过移动到指定坐标（以双精度指定），将一个点添加到路径中。 
shape.lineTo(px[5], py[5]);//通过绘制一条从当前坐标到新指定坐标（以双精度指定）的直线，将一个点添加到路径中
shape.lineTo(px[1], py[1]);
shape.lineTo(px[2], py[2]); 
shape.lineTo(px[4], py[4]);
shape.lineTo(px[3], py[3]); 
//通过绘制一条向后延伸到最后一个 moveTo 的坐标的直线，封闭当前子路径。如果该路径已封闭，则此方法无效
shape.closePath();
}

/**
 * @Description 画直线，直线路径的定义
 */
private void straightLine() {

length = Math.hypot(endX - startX, endY - startY);//直线的长度 返回 sqrt(x^2 +y^2)，没有中间溢出或下溢。
double[] px = new double[4];
double[] py = new double[4];

if (endX == startX) { //竖直线
middleX=endX;
middleY=(endY+startY)/2;
px[0] = startX;
py[0] = startY;
px[1] = endX  ;
py[1] = endY;
px[2] = endX - len;
py[2] = endY;
px[3] = startX - len;
py[3] = startY;
} else if (endY == startY) { //横直线
middleX=(startX+endX)/2;
middleY=endY;
px[0] = startX;
py[0] = startY;
px[1] = endX;
py[1] = endY ;
px[2] = endX;
py[2] = endY + len;
px[3] = startX;
py[3] = startY + len;
} else {//斜线
double sin = (endX - startX) / length;
double cos = (endY - startY) / length;
if(startX<endX){
middleX=startX+Math.abs (endX - startX) /2;
}else{
middleX=endX+Math.abs (endX - startX) /2;
}
if(startY>endY){
middleY=endY+Math.abs((endY-startY)/2);
}else{
middleY=startY+Math.abs((endY-startY)/2);
}
px[0] = startX + len * cos;
py[0] = startY - len * sin;
px[1] = endX + len * cos;
py[1] = endY - len * sin;
px[2] = endX - len * cos;
py[2] = endY + len * sin;
px[3] = startX - len * cos;
py[3] = startY + len * sin;
}
/*x2=e;
y2=f;*/
shape.moveTo(px[0], py[0]);//通过移动到指定坐标（以双精度指定），将一个点添加到路径中。 
shape.lineTo(px[1], py[1]);//通过绘制一条从当前坐标到新指定坐标（以双精度指定）的直线，将一个点添加到路径中
shape.lineTo(px[2], py[2]);
shape.lineTo(px[3], py[3]); 
shape.closePath();
}

/**
 * @Description判断鼠标是否移到路径对象上
 * */
public boolean contains(int x, int y) {
return Path2D.contains(shape.getPathIterator(null), new Point2D.Float(x, y));
}
}

package com.bh.realTimeMonitor.view.EquConnectionMonitorView;import java.awt.BasicStroke;import java.awt.Color;import java.awt.Cursor;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Paint;import java.awt.Point;import java.awt.RenderingHints;import java.awt.Stroke;import java.awt.event.ActionEvent;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.geom.GeneralPath;import java.util.ArrayList;import java.util.HashSet;import java.util.Iterator;import java.util.List;import java.util.Set;import javax.swing.AbstractAction;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JLabel;import javax.swing.JLayeredPane;import javax.swing.JMenu;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JPopupMenu;import javax.swing.JTextField;import javax.swing.JTextPane;import javax.swing.SwingConstants;import javax.swing.event.MouseInputListener;import com.bh.realTimeMonitor.business.InterfaceBusiness;import com.bh.realTimeMonitor.business.LineBusiness;import com.bh.realTimeMonitor.entity.Equipment;import com.bh.realTimeMonitor.entity.Line;import com.bh.realTimeMonitor.entity.LineType;import com.bh.realTimeMonitor.view.EquRealTimeMonitor;/** * 设备连接管理界面中的画图面板。在面板上画线，可以选择直线，可以移动、拉伸、删除直线。 * @author 崔耀强 20150507-20150822 * @version 1.1 */public class EquConnectionEditPanel extends JLayeredPane{    private static final long serialVersionUID = 1L;    public  Set<Line> lines;    private Line inLine;    private Line selectedLine; // 选中的line    private Line tmpSelectedLine; // 移动时临时的线    private LineType linetype;    private InterfaceBusiness interfaceBussiness;    private LineBusiness lineBusiness;    private int module=1;//所属模块    private float range = 4f;//判断两个点是否离得很近 近的标准用range    public  boolean lineFlag=true;    private boolean cureFlag;    private int pressIndex = 0;    public EquConnectionEditPanel() {        lines = new HashSet<Line>();        interfaceBussiness=new InterfaceBusiness();        lineBusiness=new LineBusiness();        MyMouseListener mouseListener = new MyMouseListener();        addMouseListener(mouseListener);        addMouseMotionListener(mouseListener);        //this.add(new JLabel(new ImageIcon("img/-1.jpg")));        this.repaint();    }    /** * 面板鼠标事件（画线）包括画线过程中的所有的鼠标事件 实现了MouseInputListener接口 ** 4种状态：0无任何状态1选中直线2选中端点3开始画线 * */    class MyMouseListener implements MouseInputListener {        private Point oldPoint;        boolean isDragge;        private Point p1;        private Point p2;        private Point p3;        private  List<LineType> lineTypeList;        private boolean middleFlag;        /** * 解决鼠标焦点超出面板（线的第一个坐标） * */        private void constructStartP(Line ln, int x, int y) {            if (x > getWidth())                ln.startX = getWidth();            else if (x < 0)                ln.startX = 0;            else                ln.startX = x;            if (y > getHeight())                ln.startY = getHeight();            else if (y < 0)                ln.startY = 0;            else                ln.startY = y;            //表示是折线            if((ln.getLineShape()==1)){                if(isRange(new Point(ln.startX,ln.startY), new Point(ln.middleX,ln.middleY))){                    ln.lineShape=0;                }            }        }        /** * 解决鼠标焦点超出面板（线的第二个坐标） * */        private void constructEndP(Line ln, int x, int y) {            //表示是折线            if((ln.getLineShape()==1)){                if(isRange(new Point(ln.endX,ln.endY), new Point(ln.middleX,ln.middleY))){                    ln.lineShape=0;                }            }             if (x > getWidth())                ln.endX = getWidth();            else if (x < 0)                ln.endX = 0;            else                ln.endX = x;            if (y > getHeight())                ln.endY = getHeight();            else if (y < 0)                ln.endY = 0;            else                ln.endY = y;        }        /** * 解决鼠标焦点超出面板（线的中间坐标） * */        private void constructMiddleP(Line ln, int x, int y) {            if(ln.getLineShape()!=2){                ln.middleX = ln.startX;                ln.middleY = ln.endY;            }else{                if (x > getWidth())                    ln.middleX = getWidth();                else if (x < 0)                    ln.middleX = 0;                else                    ln.middleX = x;                if (y > getHeight())                    ln.middleY = getHeight();                else if (y < 0)                    ln.middleY = 0;                else                    ln.middleY = y;            }        }        @Override        /** * 鼠标点击面板选择画线（直线、曲线） * */        public void mouseClicked(MouseEvent e) {            if(e.getButton()==3){                JPopupMenu  popup = new JPopupMenu();                JMenu lineMenu=new JMenu("画直线");                JMenu arcMenu=new JMenu("画曲线");                lineTypeList=new ArrayList <LineType>();                try {                    lineTypeList=lineBusiness.getLineTypeList();                } catch (Exception e2) {                    throw new RuntimeException();                }                //直线                for(LineType lineType:lineTypeList){                    JMenuItem lineItem = new JMenuItem(lineType.getName());                    lineMenu.add(lineItem);                    lineMenu.addSeparator();                    lineItem.addActionListener(new LineAction());                }                //曲线                for(LineType lineType:lineTypeList){                    JMenuItem arcItem = new JMenuItem(lineType.getName());                    arcMenu.add(arcItem);                    arcMenu.addSeparator();                    arcItem.addActionListener(new ArcAction());                }                popup.add(lineMenu);                popup.add(arcMenu);                popup.show(e.getComponent(), e.getX(), e.getY());            }        }        @Override        public void mouseEntered(MouseEvent e) {        }        @Override        public void mouseExited(MouseEvent e) {        }        @Override        /** * 鼠标移动判断光标 * */        public void mouseMoved(MouseEvent e) {            /** 判断是否移动到某直线上或者直线的端点上 * setCursor为指定的光标设置光标图像。 * **/            EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));// +            if (pressIndex != 3)                pressIndex = 0;            // 先清空            for (Line line : lines) {                line.isSelectP0 = false;                line.isSelectP1 = false;                line.isSelectP2 = false;                line.isSelected = false;            }            if (pressIndex == 3) {                EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));                return;            }            // 判断是否选中直线，若是则将光标改变            for (Line line : lines) {                if (line.contains(e.getX(), e.getY())) {                    middleFlag=false;                    line.isSelected = true;                    pressIndex = 1;                    EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));                    break;                }             }            // 如果选中了某条直线，再判断该直线的端点是否被选中            if (selectedLine != null) {                middleFlag=false;                Line line = selectedLine;                Point p = new Point(e.getX(), e.getY());                p1 = new Point(line.startX, line.startY); // 左端点                p2 = new Point(line.endX, line.endY); // 右端点                p3 = new Point(line.middleX, line.middleY); // 中间端点                if (isRange(p1, p)) {                    line.isSelectP0 = true;                    pressIndex = 2;                    EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));                }                if (isRange(p2, p)) {                    line.isSelectP1 = true;                    pressIndex = 2;                    EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));                }                if(isRange(p3,p)){                    line.isSelectP2 = true;                    pressIndex = 2;                    middleFlag=true;                    EquRealTimeMonitor.jf.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));                }            }        }        @Override        /** * 鼠标摁下事件 * */        public void mousePressed(MouseEvent e) {            switch (pressIndex) {            case 0:                selectedLine = null;                for (Line line : lines) {                    line.isSelectP0 = false;                    line.isSelectP1 = false;                    line.isSelectP2 = false;                    line.isSelected = false;                }                break;            case 1:                for (Line line : lines) {                    if (line.isSelected) {                        selectedLine = line;                        break;                    }                }                tmpSelectedLine = new Line();                tmpSelectedLine.setLineType(selectedLine.getLineType());                tmpSelectedLine.lineShape=selectedLine.lineShape;                tmpSelectedLine.startX = selectedLine.startX;                tmpSelectedLine.endX = selectedLine.endX;                tmpSelectedLine.startY = selectedLine.startY;                tmpSelectedLine.endY = selectedLine.endY;                tmpSelectedLine.middleX = selectedLine.middleX;                tmpSelectedLine.middleY = selectedLine.middleY;                tmpSelectedLine.constructShape( );                oldPoint = new Point(e.getX(), e.getY());                break;             case 2:                break;            case 3:                inLine = new Line();                inLine.startX = e.getX();                inLine.startY = e.getY();                inLine.setLineType(linetype);                break;            default:                break;            }        }        @Override        /** * 鼠标拖动事件 * */        public void mouseDragged(MouseEvent e) {            switch (pressIndex) {            case 0:                break;            case 1:                Point point = new Point(e.getX(), e.getY());                int lenx = point.x - oldPoint.x;                int leny = point.y - oldPoint.y;                tmpSelectedLine.startX = selectedLine.startX + lenx;                tmpSelectedLine.endX = selectedLine.endX + lenx;                tmpSelectedLine.startY = selectedLine.startY + leny;                tmpSelectedLine.endY = selectedLine.endY + leny;                tmpSelectedLine.middleX = selectedLine.middleX+ lenx;                tmpSelectedLine.middleY = selectedLine.middleY+ leny;                tmpSelectedLine.constructShape( );                isDragge = true;                break;            case 2:                Line line = selectedLine;// lines.get(selectPointInWhichLine);                if (line.isSelectP0) {                    constructStartP(line, e.getX(), e.getY());                }                if (line.isSelectP1) {                    constructEndP(line, e.getX(), e.getY());                }                if (line.isSelectP2) {//2 曲线 1 折线 0 直线                    if(!(line.getLineShape()==2)){                        line.lineShape=1;                    }                    constructMiddleP(line, e.getX(), e.getY());                }                line.constructShape( );                break;            case 3:                //判断是否超出面板                constructEndP(inLine, e.getX(), e.getY());                //对线的形状处理                inLine.constructShape( );                break;            default:                break;            }            repaint();        }        @Override        /** * 鼠标释放事件 * */        public void mouseReleased(MouseEvent e) {            switch (pressIndex) {            case 0:                break;            case 1:                Point point = new Point(e.getX(), e.getY());                if(!middleFlag){                    try {                        int lenx = point.x - oldPoint.x;                        int leny = point.y - oldPoint.y;                        selectedLine.startX += lenx;                        selectedLine.startY += leny;                        selectedLine.endX += lenx;                        selectedLine.endY += leny;                         selectedLine.middleX += lenx;                        selectedLine.middleY += leny;                         selectedLine.constructShape( );                        lineBusiness.updateLine(selectedLine);                     } catch (Exception e2) {                        throw new RuntimeException();                    }                    tmpSelectedLine = null;                    //返回此鼠标事件是否为该平台的弹出菜单触发事件                    if (!isDragge && e.isPopupTrigger()) {                        JPopupMenu  popup = new JPopupMenu();                        JMenuItem removeItem = new JMenuItem("删除线条");                        JMenuItem updateItem = new JMenuItem("修改线长");                        popup.add(removeItem);                        popup.addSeparator();                        popup.add(updateItem);                        removeItem.addActionListener(new RemoveAction());                        updateItem.addActionListener(new UpdateAction());                        popup.show(e.getComponent(), e.getX(), e.getY());                    }                    isDragge = false;                }else{                    try {                        selectedLine.lineShape=1;                        selectedLine.startX = selectedLine.startX;                        selectedLine.startY = selectedLine.startY;                        selectedLine.endX = selectedLine.endX;                        selectedLine.endY = selectedLine.endY;                        selectedLine.middleX = e.getX();                        selectedLine.middleY = e.getY();                        selectedLine.constructShape( );                        lineBusiness.updateLine(selectedLine);                    } catch (Exception e2) {                        throw new RuntimeException();                    }                    tmpSelectedLine = null;                    isDragge = false;                }                break;            case 2:                try {                    Line line = selectedLine;                    if (line.isSelectP0) {                        constructStartP(line, e.getX(), e.getY());                    }                    if (line.isSelectP1) {                        constructEndP(line, e.getX(), e.getY());                    }                    if (line.isSelectP2) {                        constructMiddleP(line, e.getX(), e.getY());                    }                    lineBusiness.updateLine(line);                    line.constructShape( );                } catch (Exception e2) {                    throw new RuntimeException();                }                break;            case 3:                if(cureFlag){                    inLine.setLineShape(2);                }else{                    inLine.setLineShape(0);                }                constructEndP(inLine, e.getX(), e.getY());                inLine.constructShape( );                //规定长度必须大于5                if(inLine.length>5){                    try {                        int id=lineBusiness.getMaxId();                        inLine.setId(id+1);                    } catch (Exception e2) {                        throw new RuntimeException();                    }                    LineLengthDialog   lineLength=new LineLengthDialog(EquRealTimeMonitor.jf,inLine);                    lineLength.setVisible(true);                    boolean ok_cancel=lineLength.getClickSource();                    if(ok_cancel){                        lines.add(inLine);                        /*selectedLine = inLine; selectedLine.isSelected = true;*/                    }                    inLine = null;                    pressIndex = 0;                    break;                }            default:                break;            }            // 统一在鼠标释放的时候重绘            repaint();        }    }    /** * 删除线条类 * */    class RemoveAction extends AbstractAction {        private static final long serialVersionUID = 1L;        @Override        public void actionPerformed(ActionEvent e) {            Object[] options = { "OK", "CANCEL" };            int op=JOptionPane.showOptionDialog(null, "确定删除???", "Warning",                     JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,                    null, options, options[0]);            if(op==0){                int id=selectedLine.getId();                try {                    try {                        lineBusiness.removeLine(id);                    } catch (Exception e2) {                        throw new RuntimeException();                    }                    if (lines.remove(selectedLine)){                        selectedLine = null;                        pressIndex = 0;                    }                 } catch (Exception e2) {                    JOptionPane.showMessageDialog(null, "数据库删除线条失败!!!");                }            }            repaint();        }    }     /** * 修改线条长度类 * */    class UpdateAction extends AbstractAction {        private static final long serialVersionUID = 1L;        private JTextPane jtp;        private JTextField jtp2;        private Line myLine2;        @Override        public void actionPerformed(ActionEvent e) {            //线条不为空            int id=selectedLine.getId();            final JDialog dialog = new JDialog(EquRealTimeMonitor.jf);            dialog.setTitle("修改线长度");            dialog.setModal(true);            dialog.setSize(260, 200);            dialog.setLocationRelativeTo(EquRealTimeMonitor.jf);            dialog.setLayout(null);            JLabel lineIDLabel=new JLabel(" 线 条 ID:");            lineIDLabel.setHorizontalAlignment(SwingConstants.RIGHT);            lineIDLabel.setBounds(5, 10, 100, 30);            JTextPane jtpId=new JTextPane();            jtpId.setEditable(false);            jtpId.setText(id+"");            jtpId.setBounds(110, 11, 80, 20);            JLabel beforeChangeLabel=new JLabel("修改前线条长度:");            beforeChangeLabel.setHorizontalAlignment(SwingConstants.RIGHT);            beforeChangeLabel.setBounds(5, 40, 100, 30);            jtp=new JTextPane();            jtp.setEditable(false);            jtp.setBounds(110, 45, 80, 20);            try {                myLine2= lineBusiness.getLineByID(id);            } catch (Exception e2) {                throw new RuntimeException();            }            jtp.setText(myLine2.getDistance()+"");            JLabel afterChangeLabel=new JLabel("修改后线条长度:");            afterChangeLabel.setHorizontalAlignment(SwingConstants.RIGHT);            afterChangeLabel.setBounds(5, 70, 100, 30);            jtp2=new JTextField();            jtp2.setBounds(110, 75, 80, 20);            JPanel jp=new JPanel();            JButton confirm=new JButton("确定");            JButton cancel=new JButton("取消");            jp.add(confirm);            jp.add(cancel);            jp.setBounds(0, 110, 280, 80);            dialog.add(jp);            dialog.add(lineIDLabel);            dialog.add(beforeChangeLabel);            dialog.add(jtpId);            dialog.add(jtp);            dialog.add(afterChangeLabel);            dialog.add(jtp2);            jtp2.addKeyListener(new KeyListener() {                private int count;                @Override                public void keyTyped(KeyEvent e) {                    int keyChar = e.getKeyChar();                                     if(keyChar >= KeyEvent.VK_0 && keyChar <= KeyEvent.VK_9 || keyChar==KeyEvent.VK_PERIOD){                        if(keyChar==KeyEvent.VK_PERIOD){                            count++;                            if(count>=2){                                e.consume();                            }                        }                    }else{ // 如果输入的不是数字则屏蔽输入                        e.consume(); //关键，屏蔽掉非法输入                     }                 }                @Override                public void keyReleased(KeyEvent arg0) {                }                @Override                public void keyPressed(KeyEvent arg0) {                }            });            confirm.addMouseListener(new MouseAdapter() {                @Override                public void mouseClicked(MouseEvent e) {                    try {                        String dis=jtp2.getText();                        if(dis!=null){                            myLine2.setDistance(Double.parseDouble(dis));                            lineBusiness.updateLine(myLine2);                            //changeLineLength(myLine2);                            Iterator<Line> iterator= lines.iterator();                            while(iterator.hasNext()){                                Line line=iterator.next();                                if(line.getId()==myLine2.getId()){                                    line.setDistance(myLine2.getDistance());                                    dialog.dispose();                                    return;                                }                            }                        }                    } catch (Exception e2) {                        try {                            throw new Exception();                        } catch (Exception e1) {                            e1.printStackTrace();                        }                    }}            });            cancel.addMouseListener(new MouseAdapter() {                @Override                public void mouseClicked(MouseEvent arg0) {                    pressIndex=0;                    dialog.dispose();                }            });            dialog.setVisible(true);        }    }     /** * 选择画直线的类 * */    class LineAction extends AbstractAction {        private static final long serialVersionUID = 1L;        @Override        public void actionPerformed(ActionEvent e) {            try {                String lineTypeName=((JMenuItem)e.getSource()).getText();                LineType lineType=  lineBusiness.getLineTypeByName(lineTypeName);                pressIndex=3;                cureFlag=false;                setMyLineType(lineType);            } catch (Exception e2) {                throw new RuntimeException();            }        }    }     /** * 选择画曲线的类 * */    class ArcAction extends AbstractAction {        private static final long serialVersionUID = 1L;        @Override        public void actionPerformed(ActionEvent e) {            try {                String lineTypeName=((JMenuItem)e.getSource()).getText();                LineType lineType=  lineBusiness.getLineTypeByName(lineTypeName);                cureFlag=true;                pressIndex=3;                setMyLineType(lineType);                } catch (Exception e2) {                throw new RuntimeException();            }        }    }    /** * 判断两个点是否离得很近 近的标准用range来横来 * @param a 第一个点坐标 * @param b 第二点坐标 * @return 离得近为真，否则为假 */    private boolean isRange(Point a, Point b) {        if (Math.hypot(a.x - b.x, a.y - b.y) < range)//返回 sqrt(x2 +y2)，没有中间溢出或下溢。            return true;        return false;    }    // 画图的按钮的背景和标签    protected void paintComponent(Graphics g2) {        super.paintComponents(g2);        //增加网格背景        ImageIcon icon=new ImageIcon("configuration/sourceRealTimeMonitor/realTimeMonitor_Image/equConn_img\\-1.jpg");        g2.drawImage(icon.getImage(),0, 0,this);        Graphics2D g = (Graphics2D) g2;        //消除锯齿        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);        //Paint 接口定义如何为 Graphics2D 操作生成颜色模式。        Paint oldPaint = g.getPaint();        /* * Stroke 接口允许 Graphics2D 对象获得一个 Shape，该 Shape 是指定 Shape 的装饰轮廓 * ，或该轮廓的风格表示形式。描绘一个 Shape 如同使用一支具有适当大小和形状的画笔描绘其轮廓 * */        Stroke s = g.getStroke();        //画线        for (Line line : lines) {            LineType lineType=  line.getLineType();            g.setStroke(new BasicStroke(lineType.getWeight()));            int colorX= lineType.getColorX();            int colorY= lineType.getColorY();            int colorZ= lineType.getColorZ();            g.setPaint(new Color(colorX, colorY, colorZ));             GeneralPath shape = line.shape;            g.setPaint(new Color(colorX, colorY, colorZ));             g.draw(shape);            g.fill(shape);            /* * 画线长 * */            g.setPaint(Color.yellow);             g.drawString(line.getDistance()+"", line.middleX+10, line.middleY);        }        // 如果被选择，那么直线的两端应该会有两个bai点        if (selectedLine != null) {            Line line = selectedLine;            int side = (int) line.getLineType().getWeight();            if(side==0){                side=4;            }            g.setPaint(Color.white);            g.drawOval((int) (line.startX - side / 1.5), line.startY - side / 2, side, side+1);            g.drawOval((int) (line.endX - side / 1.5), line.endY - side / 2, side, side+1);            g.fillOval((int) (line.startX - side / 1.5), line.startY - side / 2, side, side+1);            g.fillOval((int) (line.endX - side / 1.5), line.endY - side / 2, side, side+1);            g.drawOval((int) (line.middleX - side / 1.5), line.middleY - side / 2, side, side+1);            g.fillOval((int) (line.middleX - side / 1.5), line.middleY - side / 2, side, side+1);         }        if (tmpSelectedLine != null) {            LineType lineType=  tmpSelectedLine.getLineType();            g.setStroke(new BasicStroke(lineType.getWeight()));            g.setPaint(Color.BLACK);            GeneralPath shape = tmpSelectedLine.shape;            g.fill(shape);        }        // 画正在产生的直线        if (inLine != null) {            LineType lineType=  inLine.getLineType();            g.setStroke(new BasicStroke(lineType.getWeight()));            int colorX= lineType.getColorX();            int colorY= lineType.getColorY();            int colorZ= lineType.getColorZ();            g.setPaint(new Color(colorX, colorY, colorZ));             GeneralPath shape = inLine.shape;            if (shape != null)                g.fill(shape);        }        g.setPaint(oldPaint);        g.setStroke(s);        g2.dispose();    }    @Override    public void paint(Graphics g) {        super.paint(g);        if(lineFlag){            try {                if(lines!=null&&lines.size()>0){                    lines.clear();                }                ArrayList<Equipment> equPosList = interfaceBussiness.getPostionEqu(EquConnectionEditView.allEquList,module);                 List<Integer> lineIdList=new ArrayList<Integer>();                lineIdList=lineBusiness.getLineIdList(equPosList);                 List<Line> lineList =new ArrayList<Line>();                  lineList = lineBusiness.getLineList(lineIdList);                if(lineList!=null){                    for(int i=0;i<lineList.size();i++){                        Line line=new Line();                        line.setId(lineList.get(i).getId());                        line.setDistance(lineList.get(i).getDistance());                        line.setLineShape(lineList.get(i).getLineShape());                        line.setLen(lineList.get(i).getLen());                        line.setStartX(lineList.get(i).getStartX());                        line.setStartY(lineList.get(i).getStartY());                        line.setEndX(lineList.get(i).getEndX());                        line.setEndY(lineList.get(i).getEndY());                        line.setMiddleX(lineList.get(i).getMiddleX());                        line.setMiddleY(lineList.get(i).getMiddleY());                        line.setLineType(lineList.get(i).getLineType());                        line.constructShape( );                        lines.add(line);                        lineFlag=false;                    }                }            } catch (Exception e) {                throw new RuntimeException();            }        }        repaint();        paintComponents(g);    }    /** * 用于绘制新线时给线设置线类型对象 * */    public  void setMyLineType(LineType lineType){        linetype=lineType;    }}

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