statusbar.java

简单的画图程序

package boya;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
class StatusBar extends JPanel implements ID{
 private StatusPane colorPane=new StatusPane("红色");
 private StatusPane typePane=new StatusPane("直线");
 class StatusPane extends JLabel{
  private Font paneFont=new Font("宋体",Font.PLAIN,12);
  public StatusPane(String text){
   setForeground(Color.black);
   setFont(paneFont);
   setHorizontalAlignment(CENTER);
   setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));;
   setPreferredSize(new Dimension(70,18));
   setText(text);
  }
 }
 public StatusBar(){
  setLayout(new FlowLayout(FlowLayout.RIGHT,10,3));
  setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
  setColorPane(DEFAULT_ELEMENT_COLOR);
  setTypePane(DEFAULT_ELEMENT_TYPE);
  add(colorPane);
  add(typePane);
 }
 public void setColorPane(Color color){
  String text;
  if(color.equals(Color.red))
   text="红色";
  else if(color.equals(Color.yellow))
   text="黄色";
  else if(color.equals(Color.green))
   text="绿色";
  else if(color.equals(Color.blue))
   text="蓝色";
  else text="未定义";
  colorPane.setText(text);
 }
 public void setTypePane(int element){
  String text;
  switch(element){
   case LINE:
    text="直线";
    break;
   case RECTANGLE:
    text="矩形";
    break;
   case CIRCLE:
    text="圆";
    break;
   case CURVE:
    text="曲线";
    break;
   case TEXT:
    text="文字";
    break;
   default:
    text="错误";
    break;
  }
  typePane.setText(text);
 }
}