布局管理器layoutmanager.txt

利用LayoutManager进行界面的控制。

          if(isLongTextFields(mjc1))
          {
            starty+=HEIGHT+m_vGap;
          }
        }

      }



    }
  }

  public int getHGap()
  {
    return m_hGap;
  }

  public int getVGap()
  {
    return m_vGap;
  }






  public String toString()
  {
    return "javamonkey";
  }
  //-----------------
  protected Dimension getPreferredSize(Vector v,Container parent)
  {
    int iSize = v.size();
    //int cSize = parent.getPreferredSize();
    int lbWidth = 0;
    int sfWidth = 0;
    int mjcWidth = 0;
    int height = 0;
    Insets   insets = parent.getInsets();
    for(int i = 0;i<iSize;i++)
    {
      Component mjc = (Component)v.get(i);
      int count = this.find(parent,mjc);
      Component label = parent.getComponent(count-1);
      Component suffix = parent.getComponent(count+1);
      lbWidth = Math.max(lbWidth,label.getPreferredSize().width);
      sfWidth = Math.max(sfWidth,suffix.getPreferredSize().width);
      mjcWidth = Math.max(mjcWidth,mjc.getPreferredSize().width);
      //高度都定为label高度
      //height = height+label.getPreferredSize().height+m_vGap;
      height = height+HEIGHT+m_vGap;
    }
    int thisWidth = lbWidth+m_hGap+mjcWidth+m_hGap+sfWidth;
    int thisHeight = height;
    return new Dimension(thisWidth,thisHeight);
  }

  private Divider getDivider(Vector v,Container parent)
  {
    int iSize = v.size();
    //int cSize = parent.getPreferredSize();
    int lbWidth = 0;
    int sfWidth = 0;
    int mjcWidth = 0;

    for(int i = 0;i<iSize;i++)
    {
      Component mjc = (Component)v.get(i);
      int count = this.find(parent,mjc);
      Component label = parent.getComponent(count-1);
      Component suffix = parent.getComponent(count+1);
      lbWidth = Math.max(lbWidth,label.getPreferredSize().width);
      sfWidth = Math.max(sfWidth,suffix.getPreferredSize().width);
      mjcWidth = Math.max(mjcWidth,mjc.getPreferredSize().width);
    }
    return new Divider(lbWidth,sfWidth);
  }

  private Vector[] getSimpleComponents(Container parent,int col)
  {
    Vector v = new Vector();
    for (int k=1 ; k<parent.getComponentCount(); k+=3)
    {

      Component mjc = (Component)parent.getComponent(k);
      if(!isLongTextFields(mjc))v.add(mjc);;

    }
    Vector[] array = new Vector[col];


    for (int k=0 ; k<col; k++)
    {
      array[k] = new Vector();
    }
    for (int k=0 ; k<v.size(); k++)
    {
      int cols = k%col;

      Component mjc = (Component)v.get(k);

      array[cols].add(mjc);


    }

    return array;

  }

  private Vector getComplexComponents(Container parent)
  {
    Vector v = new Vector();
    for (int k=1 ; k<parent.getComponentCount(); k+=3)
    {

      Component mjc = (Component)parent.getComponent(k);
      if(isLongTextFields(mjc))v.add(mjc);;



    }

    return v;

  }

  private int getComplexDivider(Container parent)
  {
    Vector v = getComplexComponents(parent);
    int iSize = v.size();

    int lbWidth = 0;


    for(int i = 0;i<iSize;i++)
    {
      Component mjc = (Component)v.get(i);
      int count = this.find(parent,mjc);
      Component label = parent.getComponent(count-1);
      lbWidth = Math.max(lbWidth,label.getPreferredSize().width);

    }
    return lbWidth;

  }
  private boolean isLongTextFields(Component mjc)
  {
    if(mjc instanceof javax.swing.JTextArea) return true;
    if(mjc instanceof javax.swing.JPanel) return true;
    else
    {
      return false;
    }


  }
  private int find(Container parent,Component cp)
  {
    Component[] cps = parent.getComponents();
    for(int i=0;i<cps.length;i++)
    {
      if(cp.equals(cps[i]))return i;
    }
    return -1;
  }
}
//用于表示每个列的所有preLable,suffixLabel最大值
class Divider
{
  int left;
  int right;
  public Divider(int left,int right)
  {
    this.left = left;
    this.right =right;
  }

}[/pre]


应用布局管理器



凡是刚接触swing的，无不对布局头疼，以下是flowLayout和DialogLayout的综合使用，可以看到，只用它们俩个（有时候，还需要用BorderLayout用于宏观布局），就可以轻松做出比较美观的复杂界面

列子如下

[pre]import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author javamonkey
 * @version 1.0
 */

public class Frame4 extends JFrame {
  private JPanel contentPane;
  

  //Construct the frame
  public Frame4() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame4.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(new DialogLayout());
    //第一组布局单元
    contentPane.add(new JLabel("date:"));
    contentPane.add( new JTextField());
    contentPane.add( new suffixLabel());
    //第二组布局单元
    contentPane.add( new JLabel("from:"));
    contentPane.add( new  JTextField());
    contentPane.add( new  suffixLabel());
    //第三组布局单元
    contentPane.add( new  JLabel("memo:"));
    JTextArea tx = new JTextArea();
    tx.setPreferredSize(new Dimension(0,50));
    contentPane.add(tx );
    contentPane.add( new suffixLabel());
    //第四组布局单元
    contentPane.add( new  JLabel("cash:"));
   contentPane.add(new  JTextField());
    contentPane.add( new suffixLabel("$"));


    //第五组布局单元
    JPanel pl = new JPanel();
    pl.setLayout(new FlowLayout(FlowLayout.LEFT));
    pl.setBorder(BorderFactory.createEtchedBorder());
    pl.add(new JLabel("性别:"));
    pl.add(new JRadioButton("男"));
    pl.add(new JRadioButton("女"));
    contentPane.add(new Label());
    contentPane.add(pl);
    contentPane.add(new suffixLabel());


   //


    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
}

class suffixLabel extends JLabel
{
  public suffixLabel(String str)
  {
    super(str);
    this.setPreferredSize(new Dimension(10,0));


  }
  public suffixLabel()
  {
    super();
  }
}[/pre]