buttonscrollpane.java

一个类似 outlook 的工具栏

package yaokun.yuki.guangshi;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class ButtonScrollPane extends javax.swing.JPanel {
  //该控件有两种模式，一是单行多列，二是多行多列；其模式在对象创建时选定，创建后不能修改
  static final int TABLE_MODE=0;
  static final int ONELINE_MODE=1;
  JButton buts[]=null;
  int currentBut=0;
  int scrollPaneHeight=50;  //控件高度
  int mode=ONELINE_MODE;   //模式
  int column=4;    //列数
  int row=1;        //行数
  int visibleNum=0;
  JScrollPane scrollPane = new JScrollPane();
  JPanel mainP = new JPanel();
  GridLayout gridLayout = new GridLayout();
  BorderLayout borderLayout1 = new BorderLayout();
  JButton leftBut = new JButton();
  JButton rightBut = new JButton();

  //构造函数
  public ButtonScrollPane(int mode) {
    super();
    this.mode=mode;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  public ButtonScrollPane(int mode,int columns,int rows) {
    super();
    this.mode=mode;
    this.column=columns;
    this.row=rows;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  public ButtonScrollPane(int mode,int columns) {
    super();
    this.mode=mode;
    this.column=columns;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  public ButtonScrollPane(int mode,JButton[] but,int columns) {
    super();
    this.mode=mode;
    this.column=columns;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  public ButtonScrollPane(int mode,JButton[] but,int columns,int rows) {
    super();
    this.mode=mode;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  //初始化
  private void jbInit() throws Exception {
    mainP.setLayout(gridLayout);
    gridLayout.setColumns(column);
    gridLayout.setRows(row);
    this.setLayout(borderLayout1);
    leftBut.setEnabled(false);
    leftBut.setBorder(null);
    leftBut.setMaximumSize(new Dimension(20, 20));
    leftBut.setMinimumSize(new Dimension(20, 20));
    leftBut.setPreferredSize(new Dimension(20, 20));
    leftBut.setIcon(new ImageIcon("pic/left.png"));
    leftBut.addActionListener(new ButtonScrollPane_leftBut_actionAdapter(this));
    leftBut.setRequestFocusEnabled(false);
    this.scrollPane.setMaximumSize(new Dimension(2000, scrollPaneHeight));
    this.scrollPane.setMinimumSize(new Dimension(94, scrollPaneHeight));
    this.scrollPane.setPreferredSize(new Dimension(90, scrollPaneHeight));
    rightBut.setBorder(null);
    rightBut.setMaximumSize(new Dimension(20, 20));
    rightBut.setMinimumSize(new Dimension(20, 20));
    rightBut.setPreferredSize(new Dimension(20, 20));
    rightBut.setIcon(new ImageIcon("pic/right.png"));
    rightBut.addActionListener(new ButtonScrollPane_rightBut_actionAdapter(this));
    rightBut.setRequestFocusEnabled(false);
    this.setBorder(BorderFactory.createEtchedBorder());
    this.add(scrollPane,  BorderLayout.CENTER);
    scrollPane.getViewport().add(mainP, null);
    this.scrollPane.getViewport().setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
    //不同模式显示不同SCROLLBAR
    if(mode==this.TABLE_MODE){
      this.scrollPane.setVerticalScrollBarPolicy(JScrollPane.
                                                 VERTICAL_SCROLLBAR_ALWAYS);
    }else{
      this.scrollPane.setVerticalScrollBarPolicy(JScrollPane.
                                                 VERTICAL_SCROLLBAR_NEVER);
      this.scrollPane.setHorizontalScrollBarPolicy(JScrollPane.
          HORIZONTAL_SCROLLBAR_NEVER);
      //添加左、右移动按钮
      this.add(leftBut,  BorderLayout.WEST);
      this.add(rightBut,  BorderLayout.EAST);
    }
    if(buts!=null){
      //this.getVisibleNum();
      /*buts[0].scrollRectToVisible(new Rectangle(0,0,
                                                (int)buts[0].getPreferredSize().getWidth(),
                                                (int)this.gridLayout.preferredLayoutSize(this).getHeight()));
       */
      //使得第一个按钮得以显示
      this.scrollToVisible(buts[0]);
      //设置按钮可画边框
      for(int i=0;i<buts.length;i++){
        buts[i].setBorderPainted(true);
      }
    }
  }

  //向控件添加按钮
  public void setButton(JButton[] buts){
    this.buts=buts;
    //this.getVisibleNum();
    /*buts[0].scrollRectToVisible(new Rectangle(0,0,
                                                (int)buts[0].getPreferredSize().getWidth(),
                                              (int)this.gridLayout.preferredLayoutSize(this).getHeight()));
     */
    this.scrollToVisible(buts[0]);
    for(int i=0;i<buts.length;i++){
      this.mainP.add(buts[i]);
      buts[i].setBorderPainted(true);
    }
    this.repaint();
  }

  /*private int getVisibleNum(){
    visibleNum=(int)(this.scrollPane.getSize().getWidth()/
        this.buts[0].getSize().getWidth());
    //System.out.println("show "+visibleNum+" buttons"+"size"+(int)this.scrollPane.getSize().getWidth()+":"+
    //    (int)this.buts[0].getSize().getWidth());
    //this.currentBut=num-1;
    return visibleNum;
  }*/

  //右移按钮被点击后，使控件中下一个按钮被显示
  void rightBut_actionPerformed(ActionEvent e) {
    //this.getVisibleNum();
    if(currentBut+1>=buts.length){  //下一个按钮编号不小于按钮总数时，右按钮失效
      rightBut.setEnabled(false);    //设置按钮失效
      return;                        //返回
    }
    currentBut=this.currentBut+1;   //更新当前按钮编号
    /*buts[this.currentBut].scrollRectToVisible(new Rectangle(0,0,
        (int)buts[this.currentBut].getPreferredSize().getWidth(),
        (int)this.gridLayout.preferredLayoutSize(this).getHeight()));
    buts[this.currentBut].isVisible();*/
    leftBut.setEnabled(true);    //左按钮可用
    //System.out.println((currentBut+1)+":"+(buts.length-visibleNum+2));
    if(currentBut+1>=buts.length){   //检查
      rightBut.setEnabled(false);
    }
    this.scrollToVisible(buts[this.currentBut]);   //使当前按钮得以显示
  }

  void leftBut_actionPerformed(ActionEvent e) {
    if(currentBut<=0){   //上一个按钮编号小于等于零时，左按钮失效
      leftBut.setEnabled(false);   //设置按钮失效
      return;
    }
    currentBut=this.currentBut-1;   //更新当前按钮编号
    rightBut.setEnabled(true);      //右按钮可用
    /*buts[this.currentBut].scrollRectToVisible(new Rectangle(0,0,
        (int)buts[this.currentBut].getPreferredSize().getWidth(),
        (int)this.gridLayout.preferredLayoutSize(this).getHeight()));*/
    if(currentBut<=0){
      leftBut.setEnabled(false);
    }
    this.scrollToVisible(buts[this.currentBut]);      //使得当前按钮可以显示
  }

  //使按钮显示于SCROLLPANE的可见区域
  public void scrollToVisible(JButton but){
    /*but.scrollRectToVisible(new Rectangle(0,0,
        (int)buts[this.currentBut].getPreferredSize().getWidth(),
        (int)this.gridLayout.preferredLayoutSize(this).getHeight()));*/
    but.scrollRectToVisible(new Rectangle(0,0,
        (int)this.gridLayout.preferredLayoutSize(this).getWidth(),
        (int)this.gridLayout.preferredLayoutSize(this).getHeight()));
    but.requestFocus(true);
    //but.setSelected(true);
  }
}

class ButtonScrollPane_rightBut_actionAdapter implements java.awt.event.ActionListener {
  ButtonScrollPane adaptee;

  ButtonScrollPane_rightBut_actionAdapter(ButtonScrollPane adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.rightBut_actionPerformed(e);
  }
}

class ButtonScrollPane_leftBut_actionAdapter implements java.awt.event.ActionListener {
  ButtonScrollPane adaptee;

  ButtonScrollPane_leftBut_actionAdapter(ButtonScrollPane adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.leftBut_actionPerformed(e);
  }
}