Question

基本上，我有一个用于在其内部框架上绘制Graphs的类，它扩展了JPanel。我想到了一种方法，在不打扰当前图表的情况下向该面板添加按钮。我使用Java Window Builder b y th方式

package motor_2_package;

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class GraphingData extends JPanel {

   private static final Stroke GRAPH_STROKE = new BasicStroke(3f);
 JFrame frame = new JFrame("DrawGraph");
private static final int GRAPH_POINT_WIDTH = 12;
final int PAD = 20;

int []data1;//=new int[d.getPartList().get(i).getSaleList().size()+1]; //it         
 returns size of sales list supply
int []data2;//=new int[d.getPartList().get(i).getSaleList().size()+1]; //it 
returns size of sales list sold

int xs,ys;
details t=new details();

public GraphingData(details d,int i,int checker)
{
    frame.getContentPane().setLayout(null);

    JButton btnBack = new JButton("Back");
    btnBack.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            MotorPartFrame mf=new MotorPartFrame(d);
            mf.setVisible(true);
            frame.dispose();
        }
    });
    btnBack.setBounds(0, getHeight()-PAD, 89, 18);
    frame.getContentPane().add(btnBack);
            //paintComponent(g);
       t=new details(d);
      xs=d.getPartList().get(i).getSaleList().size()+1;

      ys=d.getPartList().get(i).getSaleList().size()+1;
      data1=new int[xs]; //it returns size of sales list supply
      data2=new int[ys]; //it returns size of sales list sold
      data1[0]=0;
      data2[0]=0;
      for(int j=1;j<=xs-1;j++)
      {
          data1[j]=j;
         if(checker==1) data2[j]=d.getPartList().get(i).getSaleList().get(j     
   -1).getSupply();
         else data2[j]=data2[j]=d.getPartList().get(i).getSaleList().get(j-  
  1).getSold();
       }


}

 @Override

 protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    int w = getWidth();
    int h = getHeight();
    // Draw ordinate.


    //now we set x- axis border and y-axis border too
    g2.draw(new Line2D.Double(PAD, PAD, PAD, h-PAD));
    // Draw abcissa.
    g2.draw(new Line2D.Double(PAD, h-PAD, w-PAD, h-PAD));
    double xInc = (double)(w - 2*PAD)/(double) (30);
    double scale=( double) (h-2*PAD)/getMax(2);

    //now to write spikes on points

    int mah=30,muh=getMax(2);
    for (int i = 0; i<muh-1; i++) {
        int x0 = PAD;
        int x1 = GRAPH_POINT_WIDTH + PAD;
        int y0 = getHeight() - (((i + 1) * (getHeight() - PAD * 2)) /(muh-1) 
 +PAD);
        int y1 = y0;
        g2.drawLine(x0, y0, x1, y1);
     }

     // and for x axis
     for (int i = 0; i < mah; i++) {
        int x0 = (i + 1) * (getWidth() - PAD * 2) / 30 + PAD;
        int x1 = x0;
        int y0 = getHeight() - PAD;
        int y1 = y0 - GRAPH_POINT_WIDTH;
        g2.drawLine(x0, y0, x1, y1);
     }

     //

     Stroke oldStroke=g2.getStroke();
     g2.setStroke(GRAPH_STROKE);
     g2.setColor(Color.RED);
     for(int i=0;i<xs-1;i++)
     {
         int x1=(int) (PAD+(xInc*data1[i]));
         int y1=(int) (getHeight()-PAD-(scale*data2[i]));
         int x2=(int) (PAD+(xInc*data1[i+1]));
         int y2=(int) (getHeight()-PAD-(scale*data2[i+1]));
         g2.drawLine(x1, y1, x2, y2);

     }

     //now for thesecond plot

     g2.setStroke(oldStroke);      
     g2.setColor(Color.BLUE);
     for (int i = 0; i < xs; i++) {
        int x =(int) ((int) PAD+(xInc*data1[i]) - GRAPH_POINT_WIDTH / 2);
        int y =(int) ((int) getHeight()-PAD-(scale)*data2[i] -   
  GRAPH_POINT_WIDTH / 2);;
        int ovalW = GRAPH_POINT_WIDTH;
        int ovalH = GRAPH_POINT_WIDTH;

        g2.fillOval(x, y, ovalW, ovalH);
     }


 }


  private int getMax(int x) {
    int max = -Integer.MAX_VALUE;
    if(x==1)
    {
        for(int i = 0;  i < data1.length; i++) {
            if(data1[i] > max)
               max = data1[i];
         }
    }
    else
    {
        for(int i = 0;  i < data2.length; i++) {
            if(data2[i] > max)
               max = data2[i];
         }
    }

    return max;

}



public void createAndShowGui(details d,int i)
{

    GraphingData mainPanel = new GraphingData(d,i,1);

    frame = new JFrame("DrawGraph");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(mainPanel);
    frame.pack();
    frame.setLocationByPlatform(true);
    frame.setVisible(true);


   }
}
enter code here

Answer 1

有两种可能性：

使用LayoutManager，例如BorderLayout，将原始面板放在中间，将面板放在南边的按钮上。
您也可以自己绘制按钮，例如通过将两个填充的矩形放在彼此顶部并在其中放置一些文本，然后您需要保存坐标并检测该矩形中的鼠标点击。

如何在java中使用Graph添加按钮到框架？

1 个答案: