swt combo 自动补全

public class AutoCompleteComboMain {      static final Display display = new Display();      static final Shell shell = new Shell(display);      static String[] items = new String[] { "Monday" , "Tuesday" , "Wednesday" , "Thursday" , "Friday" , "Saturday" , "Sunday" };        public static void main(String[] args) {          shell.setText( "SWT" );          shell.setLayout( new GridLayout());            Combo combo = new Combo(shell, SWT.BORDER);          for ( int i = 0 ; i < items.length; i++) {              combo.add(items[i]);          }          ComboUtil.addAutoCompleteFeature(combo);                  shell.pack();          shell.open();          while (!shell.isDisposed()) {              if (!display.readAndDispatch()) {                  display.sleep();              }          }          display.dispose();      } }

 

关键的ComboUtil的代码如下：

 

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public class ComboUtil {      public static void addAutoCompleteFeature(Combo combo) {          // Add a key listener          combo.addKeyListener( new KeyAdapter() {              public void keyReleased(KeyEvent keyEvent) {                  Combo cmb = ((Combo) keyEvent.getSource());                  setClosestMatch(cmb);              }                // Move the highlight back by one character for backspace              public void keyPressed(KeyEvent keyEvent) {                  if (keyEvent.keyCode == SWT.BS) {                      Combo cmb = ((Combo) keyEvent.getSource());                      Point pt = cmb.getSelection();                      cmb.setSelection( new Point(Math.max( 0 , pt.x - 1 ), pt.y));                  }              }                private void setClosestMatch(Combo combo) {                  String str = combo.getText();                  String[] cItems = combo.getItems();                  // Find Item in Combo Items. If full match returns index                  int index = - 1 ;                  for ( int i = 0 ; i < cItems.length; i++) {                      if (cItems[i].toLowerCase().startsWith(str.toLowerCase())) {                          index = i;                          break ;                      }                  }                    if (index != - 1 ) {                      Point pt = combo.getSelection();                      combo.select(index);                      combo.setText(cItems[index]);                      combo.setSelection( new Point(pt.x, cItems[index].length()));                  }              }          });      }

转载于:https://www.cnblogs.com/zyszeal/p/4461288.html