滚屏后，我的JLabel为什么不能向下拉了？？

Question

hoxisoft(hoxisoft) :可以先不看我的源代码三，帮帮忙。

Answer 1

因为你的代码的缘故，改了之后的效果你看看，如果得到你的效果就再改改，应该不难，如下是俺修改过的代码：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.image.*;class myIcon implements Icon//实现图标
{
        //大框图
        private double scale;
        private int startX=3;
        private int startY=3;
        private double width;
        private double height;
        //网络故障二层
        private double nWidth;
        private double nHeight;
        private int nStartx;
        private int nStarty;
        //电力故障三层
        private double eWidth;
        private double eHeight;
        private int eStartx;
        private int eStarty;
        //顶层
        //硬件故障一列
        private double hWidth;
        private double hHeight;
        private int hStartx;
        private int hStarty;
        //软件故障二列
        private double sWidth;
        private double sHeight;
        private int sStartx;
        private int sStarty;
        //更新故障二列
        private double uWidth;
        private double uHeight;
        private int uStartx;
        private int uStarty;        //和个模块的颜色
        private Color  OK_COLOR=Color.green;
        private Color  NULL_COLOR=Color.lightGray;
        private Color  eColor= Color.black;
        private Color  nColor=Color.red;
        private Color  hColor=Color.orange;
        private Color  sColor=Color.white;
        private Color  uColor=Color.pink;        myIcon(double a)
        {
                //大框图
                scale=a;
                width=100.0/scale;
                height=200.0/scale;
                //网络故障二层
                nWidth=width;
                nHeight=height/3;
                nStartx=startX;
                nStarty=startY+(int)nHeight;
                //电力故障三层
                eWidth=width;
                eHeight=height-height*2/3+2;
                eStartx=startX;
                eStarty=nStarty+(int)nHeight;
                //顶层//硬件故障一列
                hWidth=width/3;
                hHeight=nHeight;
                hStartx=startX;
                hStarty=startY;
                //软件故障二列
                sWidth=width/3;
                sHeight=nHeight;
                sStartx=hStartx+(int)hWidth;
                sStarty=startY;
                //更新故障二列
                uWidth=width-hWidth-sWidth+2;
                uHeight=nHeight;
                uStartx=sStartx+(int)hWidth;
                uStarty=startY;
        }
        public int getIconWidth(){return (int)width+3;}
        public int getIconHeight(){return (int)height+3;}
        public void paintIcon(Component c,Graphics g,int x,int y)
        {
                g.drawRect(startX,startY,(int)width,(int)height);                g.setColor(nColor);
                g.fillRect(nStartx,nStarty,(int)nWidth,(int)nHeight);                g.setColor(eColor);
                g.fillRect(eStartx,eStarty,(int)eWidth,(int)eHeight);                g.setColor(hColor);
                g.fillRect(hStartx,hStarty,(int)hWidth,(int)hHeight);                g.setColor(sColor);
                g.fillRect(sStartx,sStarty,(int)sWidth,(int)sHeight);                g.setColor(uColor);
                g.fillRect(uStartx,uStarty,(int)uWidth,(int)uHeight);                g.draw3DRect(startX-1,startY-1,(int)width+1,(int)height+1,true);
                g.draw3DRect(startX-2,startY-2,(int)width+2,(int)height+2,true);
                g.draw3DRect(startX-3,startY-3,(int)width+3,(int)height+3,true);
        }
}
class myPanel extends JPanel
{
        private Graphics g;
        private ImageIcon icon;
        private Toolkit tool=Toolkit.getDefaultToolkit();
        private myIcon myicon=new myIcon(2.0);        private Point first,last;
        int i=0;
        private int width,height;        JLabel mmm//小的
               ,lll;//大的
        myPanel(JPanel jp)
        {
                setLayout(null);
                icon=new ImageIcon("d.jpg");
                mmm=new JLabel(myicon);
                lll=new JLabel(icon);
                lll.setBounds(0,0,icon.getIconWidth(),icon.getIconHeight());
                mmm.setBounds(0,0,myicon.getIconWidth(),myicon.getIconHeight());
                jp.add(mmm);
                add(lll);
                width=icon.getIconWidth();
                height=icon.getIconHeight();
                setSize(width,height);
                mmm.addMouseListener(new MouseAdapter()
                {
                        public void mousePressed(MouseEvent e)
                        {
                                first=e.getPoint();
                                System.out.println("first="+first);
                        }
                        public void mouseReleased(MouseEvent e)
                        {
                        }                }
                );                //实现小图标的拖动
                mmm.addMouseMotionListener(new MouseMotionAdapter()
                {
                        public void mouseDragged(MouseEvent e)
                        {
                                JLabel ppp=(JLabel)e.getSource();
                                last=e.getPoint();
                                System.out.println("last="+last);
                                ppp.setLocation(ppp.getLocation().x+last.x-first.x,ppp.getLocation().y+last.y-first.y);
                        }
                }
                );        }
        public int getWidth(){return width;}
        public int getHeight(){return height;}
}
class myView extends JViewport implements AdjustmentListener
{
        //实现滚屏
        public void adjustmentValueChanged(AdjustmentEvent e)
        {
          if(((JScrollBar)e.getSource()).getName().equals("a"))
            setViewPosition(new Point(getViewPosition().x,e.getValue()));
          else if(((JScrollBar)e.getSource()).getName().equals("b"))
            setViewPosition(new Point(e.getValue(),getViewPosition().y));
          ((JPanel)super.getParent()).repaint();
        }
}
public class applet8 extends JFrame
{
        public applet8()
        {
        addWindowListener(new WindowAdapter()
        {
                public void windowClosing(WindowEvent e){System.exit(0);}
        }
        );
        }
        public static void main(String args[]) {
                Toolkit tool=Toolkit.getDefaultToolkit();
                Dimension screen=tool.getScreenSize();
                applet8 myform=new applet8();
                myPanel my=new myPanel((JPanel)myform.getContentPane());
                myView view=new myView();
                view.setView(my);
                JScrollBar ver=new JScrollBar();
                JScrollBar hor=new JScrollBar();
                hor.setOrientation(JScrollBar.HORIZONTAL);
                ver.addAdjustmentListener(view);
                hor.addAdjustmentListener(view);
                ver.setName("a");
                hor.setName("b");
                myform.setSize(800,600);
                myform.setLocation(myform.getToolkit().getScreenSize().width/2-myform.getWidth()/2,myform.getToolkit().getScreenSize().height/2-myform.getHeight()/2);
                myform.getContentPane().add(view,"Center");
                myform.getContentPane().add(ver,"East");
                myform.getContentPane().add(hor,"South");
                myform.show();
        }
}

Answer 2

beyond_xiruo(希偌) 大哥，我还在试，好象还是有点问题。明天晚上我会结分。再次感谢