我正在尝试使用
javax.swing.JList构建一个javax.swing.JTextField,用于自动完成,如Google.
当写一个字时,Google会显示几场比赛
>当按▼时,我可以使用▲和▼选择一些比赛
>可以用◀和▶编辑我的输入.
>当我按Enter键搜索框中的内容.
>当按Esc键时,盒子将更改为原始输入.
我的意思是关于Bible,我想在我学习这个词时寻找一个特定的单词.我看到了Java2sAutoTextField,但是没有箭头键的这个特殊行为.
解决方法
这需要一个自定义编码组件.绝对是一个扩展JTextField的类,并且在该类中有一个包含JList的jpopupmenu.您必须将jpopupmenu定位在文本字段的正下方,使其看起来像1个组件.
你的下一个诀窍就是在输入时进行过滤.我通常使用Java6 tablerowsorter与我预先填写数据的JTable结合使用.您将需要在JTextField上进行一些变更监听器,并拦截每个键入并获取数据.
>按键
>在DB中执行查询(或者某些数据存储获取类似的条目)
>用这些内容填充JTable
>使用基于JTextField条目的正则表达式设置RowFilter,以过滤检索到的数据
>使用关键听众管理您的操作
编辑
我鞭打了一个样品摇摆应用程序来显示我所说的话.这是一个复制/粘贴示例,应该正常工作(需要JDK 1.6).我基本上得到了你想要的,我把评论放在我告诉你填写空白的地方..例如,Escape键事件被消耗掉,你可以随便做任何事情.
initTableModel()方法只是使用数据初始化表模型.通常,您将要使用数据库或其他数据的动态填充表模型.很多可以调整,但这是例外的缘故;)所以这应该是一个很好的例子,让您修改完成您的目标.不止这个,你必须支付我$$$:)
package test.text.googleclone;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.regex.PatternSyntaxException;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.jpopupmenu;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.Keystroke;
import javax.swing.ListSelectionModel;
import javax.swing.RowFilter;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.tablerowsorter;
public class SearchAutoFillTest {
private JFrame frame = null;
private JTextField searchField = null;
private jpopupmenu popup = null;
private JTable searchTable = null;
private tablerowsorter<DefaultTableModel> rowSorter = null;
private DefaultTableModel searchTableModel = null;
public SearchAutoFilltest() {
searchTableModel = new DefaultTableModel();
initTableModel();
rowSorter = new tablerowsorter<DefaultTableModel>(searchTableModel);
searchTable = new JTable(searchTableModel);
searchTable.setRowSorter(rowSorter);
searchTable.setFillsViewportHeight(true);
searchTable.getColumnModel().setColumnSelectionAllowed(false);
searchTable.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
searchTable.getTableHeader().setReorderingallowed(false);
searchTable.setPreferredSize(new Dimension(775,100));
searchTable.setGridColor(Color.WHITE);
searchField = new JTextField();
searchField.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void changedUpdate(DocumentEvent e) {
showPopup(e);
}
@Override
public void insertUpdate(DocumentEvent e) {
showPopup(e);
}
@Override
public void removeUpdate(DocumentEvent e) {
showPopup(e);
}
});
searchField.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyreleased(KeyEvent e) {
int code = e.getKeyCode();
switch(code)
{
case KeyEvent.VK_UP:
{
cycleTableSelectionUp();
break;
}
case KeyEvent.VK_DOWN:
{
cycleTableSelectionDown();
break;
}
case KeyEvent.VK_LEFT:
{
//Do whatever you want here
break;
}
case KeyEvent.VK_RIGHT:
{
//Do whatever you want here
break;
}
}
}
@Override
public void keypressed(KeyEvent e) {
}
});
Keystroke keystroke = Keystroke.getKeystroke("ESCAPE");
searchField.getInputMap().put(keystroke,"ESCAPE");
searchField.getActionMap().put("ESCAPE",new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
//Do what you wish here with the escape key.
}
});
popup = new jpopupmenu();
popup.add(searchTable);
popup.setVisible(false);
popup.setBorder(BorderFactory.createEmptyBorder());
JPanel searchPanel = new JPanel(new BorderLayout(5,5));
searchPanel.setBorder(BorderFactory.createEmptyBorder(4,4,4));
searchPanel.add(searchField,BorderLayout.CENTER);
frame = new JFrame();
frame.setLayout(new BorderLayout(5,5));
frame.add(searchPanel,BorderLayout.norTH);
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800,500);
center(frame);
frame.setVisible(true);
}
private final void newFilter() {
RowFilter<DefaultTableModel,Object> rf = null;
try {
rf = RowFilter.regexFilter(getFilterText(),0);
}
catch(PatternSyntaxException e) {
return;
}
rowSorter.setRowFilter(rf);
}
private final String getFilterText() {
String orig = searchField.getText();
return "("+orig.toLowerCase()+")|("+orig.toupperCase()+")";
}
private void showPopup(DocumentEvent e) {
if(e.getDocument().getLength() > 0) {
if(!popup.isVisible()) {
Rectangle r = searchField.getBounds();
popup.show(searchField,(r.x-4),(r.y+16));
popup.setVisible(true);
}
newFilter();
searchField.grabFocus();
}
else {
popup.setVisible(false);
}
}
private void cycleTableSelectionUp() {
ListSelectionModel selModel = searchTable.getSelectionModel();
int index0 = selModel.getMinSelectionIndex();
if(index0 > 0) {
selModel.setSelectionInterval(index0-1,index0-1);
}
}
private void cycleTableSelectionDown() {
ListSelectionModel selModel = searchTable.getSelectionModel();
int index0 = selModel.getMinSelectionIndex();
if(index0 == -1) {
selModel.setSelectionInterval(0,0);
}
else if(index0 > -1) {
selModel.setSelectionInterval(index0+1,index0+1);
}
}
private void initTableModel() {
String[] columns = new String[] {"A"};
String[][] data = new String[][]
{
new String[] {"a"},new String[] {"aa"},new String[] {"aaab"},new String[] {"aaabb"},new String[] {"aaabbbz"},new String[] {"b"},new String[] {"bb"},new String[] {"bbb"},new String[] {"bbbbbbb"},new String[] {"bbbbbbbeee"},new String[] {"bbbbbbbeeexxx"},new String[] {"ccc"},new String[] {"cccc"},new String[] {"ccccc"},new String[] {"cccccaaaa"},new String[] {"ccccccaaaa"},};
searchTableModel.setDataVector(data,columns);
}
private void center(Window w) {
int screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;
int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
int windowWidth = w.getWidth();
int windowHeight = w.getHeight();
if (windowHeight > screenHeight) {
return;
}
if (windowWidth > screenWidth) {
return;
}
int x = (screenWidth - windowWidth) / 2;
int y = (screenHeight - windowHeight) / 2;
w.setLocation(x,y);
}
public static void main(String ... args) {
new SearchAutoFilltest();
}
}