1
我有一个Eclipse JFace Dialog
其中有几个Text
字段。当用户在文本字段中按下.
键时,我希望它的行为与按Tab键一样,并将焦点发送到下一个文本字段并丢弃.
(认为输入IP地址)。当'。'在Eclipse JFace对话框中跳转到下一个字段时按
这是如何最好地实施?
我有一个Eclipse JFace Dialog
其中有几个Text
字段。当用户在文本字段中按下.
键时,我希望它的行为与按Tab键一样,并将焦点发送到下一个文本字段并丢弃.
(认为输入IP地址)。当'。'在Eclipse JFace对话框中跳转到下一个字段时按
这是如何最好地实施?
以下是你想要的。基本上,当按下.
它增加了KeyListener
和FocusListener
通过他们Text
部件和圆:
public class TestClass
{
private static int counter = 0;
public static void main(String[] args)
{
Display display = Display.getDefault();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
/* These are the text fields */
final Text textOne = new Text(shell, SWT.BORDER);
final Text textTwo = new Text(shell, SWT.BORDER);
final Text textThree = new Text(shell, SWT.BORDER);
/* Save them in an arraylist */
final ArrayList<Text> textFields = new ArrayList<Text>();
textFields.add(textOne);
textFields.add(textTwo);
textFields.add(textThree);
/* save their position as well (not optimal, you can think of an easier method) */
final HashMap<Text, Integer> textFieldsMapping = new HashMap<Text, Integer>();
textFieldsMapping.put(textOne, 0);
textFieldsMapping.put(textTwo, 1);
textFieldsMapping.put(textThree, 2);
/* Define keylistener which takes care of using . as tab */
KeyListener keyListener = new KeyListener() {
@Override
public void keyReleased(KeyEvent arg0) {
}
@Override
public void keyPressed(KeyEvent arg0) {
/* if '.' pressed */
if(arg0.character == '.')
{
/* ignore this action */
arg0.doit = false;
/* get next text field */
Text next = textFields.get(counter);
/* force focus on this text field */
next.setFocus();
next.forceFocus();
}
}
};
/* Define focuslistener which sets current position */
FocusListener focusListener = new FocusListener() {
@Override
public void focusLost(FocusEvent arg0) {
}
@Override
public void focusGained(FocusEvent arg0) {
/* get current text field */
Text current = (Text)arg0.getSource();
/* get current position */
int currentPosition = textFieldsMapping.get(current);
/* set counter to next text field */
counter = (currentPosition + 1) % textFields.size();
}
};
/* add keylistener to text fields */
textOne.addKeyListener(keyListener);
textTwo.addKeyListener(keyListener);
textThree.addKeyListener(keyListener);
/* add focuslistener to text fields */
textOne.addFocusListener(focusListener);
textTwo.addFocusListener(focusListener);
textThree.addFocusListener(focusListener);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
}
谢谢!我最初试图找到一种方法来调用在Tab键被按下时发生的相同过程,但没有用这种方法。似乎将重点直接放在下一个控制上是一条路。您是否知道调用选项卡逻辑的方法? 因为我发布了,我找到了VerifyListener类。通过向控件添加验证监听器,我可以拦截'。'。事件并将焦点设置到下一个字段。 – 2012-07-26 13:18:18