如果Java Swing JTextField获得焦点,则会标记其所有文本。
现在,我想修改行为,以便如果用户现在按向右箭头,则光标应设置为开头的文本(位置0)。
我能够获得RIGHT Key事件并将光标设置到位置0,
但是我不知道如何将RIGHT Key事件传递给原始代码,以便它可以处理正常的行为。
JTextField preisFieldEUR = new JTextField(…);
AbstractAction right = new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
if (preisFieldEUR.getSelectionEnd() - preisFieldEUR.getSelectionStart() == preisFieldEUR.getText().length()) {
preisFieldEUR.setSelectionStart(0);
preisFieldEUR.setSelectionEnd(0);
} else {
// Todo: How to pass this event to the original keyboard handler to
// keep the normal behaviour?
}
}
};
preisFieldEUR.getInputMap().put(KeyStroke.getKeyStroke("RIGHT"), right);
非常感谢您的帮助!
最佳答案
您需要这样的东西:
Action oldAction = preisFieldEUR.getActionMap().get("caret-forward"); // probably another parameter?
AbstractAction right = new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
if (preisFieldEUR.getSelectionEnd() - preisFieldEUR.getSelectionStart() == preisFieldEUR.getText().length()) {
preisFieldEUR.setSelectionStart(0);
preisFieldEUR.setSelectionEnd(0);
} else {
oldAction.actionPeformed(e)
}
}
};