Java 使JSpinner在聚焦时选择文本
我想更改JSpinner的行为,这样当您单击文本时,它就会选择它。这样可以更容易地用所需的值替换字段。不幸的是,我无法让行为正常工作,相反,它只是在文本中插入光标,而没有选择已经存在的内容 我曾尝试通过Java 使JSpinner在聚焦时选择文本,java,swing,jspinner,focuslistener,Java,Swing,Jspinner,Focuslistener,我想更改JSpinner的行为,这样当您单击文本时,它就会选择它。这样可以更容易地用所需的值替换字段。不幸的是,我无法让行为正常工作,相反,它只是在文本中插入光标,而没有选择已经存在的内容 我曾尝试通过((DefaultEditor)this.getEditor()).getTextField(),将焦点侦听器添加到JSpinner本身和文本区域本身,但这两种方法似乎都没有达到预期效果。我的代码(用于JSpinner本身)如下所示: spinner.addFocusListener(new Fo
((DefaultEditor)this.getEditor()).getTextField()
,将焦点侦听器添加到JSpinner本身和文本区域本身,但这两种方法似乎都没有达到预期效果。我的代码(用于JSpinner本身)如下所示:
spinner.addFocusListener(new FocusAdapter(){
@Override
public void focusGained(FocusEvent e) {
((DefaultEditor) ((JSpinner) e.getSource()).getEditor()).getTextField().selectAll();
}
});
我不确定是什么问题。如果重要的话,我正在运行MacOS10.7.5和Java6U43
编辑:我在FocusGain方法的开头放了一个
System.out.println
,发现它从未被调用过。因此,关注JSpinner似乎没有注册。再次,我尝试将FocusAddWater同时放在微调器和文本字段上(但不是同时放在文本字段上)。您面临的大部分问题都与微调器在焦点事件(以及其他几个状态事件)后如何验证微调器中的任何值有关,这将绕过高亮显示
MacOS更糟糕
我最后做的是启动一个线程
,它等待了很短的时间(大约25毫秒),然后使用SwingUtilities.invokeLater
来实际执行选择
更新了一个示例
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.text.JTextComponent;
public class AutoFocusSpinner {
public static void main(String[] args) {
new AutoFocusSpinner();
}
public static final SelectOnFocusGainedHandler SHARED_INSTANCE = new SelectOnFocusGainedHandler();
public AutoFocusSpinner() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JSpinner spinner = new JSpinner(new SpinnerNumberModel(1, 0, 100, 1));
installFocusListener(spinner);
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(spinner);
frame.add(new JButton("Here for testing"));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public void installFocusListener(JSpinner spinner) {
JComponent spinnerEditor = spinner.getEditor();
if (spinnerEditor != null) {
// This is me spending a few days trying to make this work and
// eventually throwing a hissy fit and just grabbing all the
// JTextComponent components contained within the editor....
List<JTextComponent> lstChildren = findAllChildren(spinner, JTextComponent.class);
if (lstChildren != null && lstChildren.size() > 0) {
JTextComponent editor = lstChildren.get(0);
editor.addFocusListener(SHARED_INSTANCE);
}
}
}
public static <T extends Component> List<T> findAllChildren(JComponent component, Class<T> clazz) {
List<T> lstChildren = new ArrayList<T>(5);
for (Component comp : component.getComponents()) {
if (clazz.isInstance(comp)) {
lstChildren.add((T) comp);
} else if (comp instanceof JComponent) {
lstChildren.addAll(findAllChildren((JComponent) comp, clazz));
}
}
return Collections.unmodifiableList(lstChildren);
}
public static class SelectOnFocusGainedHandler extends FocusAdapter {
@Override
public void focusGained(FocusEvent e) {
Component comp = e.getComponent();
if (comp instanceof JTextComponent) {
final JTextComponent textComponent = (JTextComponent) comp;
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(25);
} catch (InterruptedException ex) {
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
textComponent.selectAll();
}
});
}
}).start();
}
}
}
}
导入java.awt.Component;
导入java.awt.EventQueue;
导入java.awt.GridBagLayout;
导入java.awt.event.FocusAdapter;
导入java.awt.event.FocusEvent;
导入java.util.ArrayList;
导入java.util.Collections;
导入java.util.List;
导入javax.swing.JButton;
导入javax.swing.JComponent;
导入javax.swing.JFrame;
导入javax.swing.JSpinner;
导入javax.swing.SpinnerNumberModel;
导入javax.swing.SwingUtilities;
导入javax.swing.UIManager;
导入javax.swing.UnsupportedLookAndFeelException;
导入javax.swing.text.JTextComponent;
公共级自动对焦器{
公共静态void main(字符串[]args){
新的自动对焦器();
}
公共静态最终SelectOnFocusGainedHandler共享_实例=新建SelectOnFocusGainedHandler();
公共自动对焦器(){
invokeLater(新的Runnable(){
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}捕获(ClassNotFoundException ex){
}catch(实例化异常){
}捕获(非法访问例外){
}捕获(无支持的LookandFeelexception ex){
}
JSpinner spinner=新JSpinner(新SpinnerNumberModel(1,0,100,1));
installFocusListener(微调器);
JFrame=新JFrame(“测试”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(新的GridBagLayout());
frame.add(微调器);
frame.add(新的JButton(“此处用于测试”);
frame.pack();
frame.setLocationRelativeTo(空);
frame.setVisible(true);
}
});
}
public void installFocusListener(JSpinner微调器){
JComponent spinnerEditor=spinner.getEditor();
if(spinnerEditor!=null){
//这是我花了几天的时间,试图使这项工作和
//最终发出嘶嘶声,抓住所有的
//编辑器中包含的JTextComponent组件。。。。
List lstChildren=findAllChildren(微调器,JTextComponent.class);
if(lstChildren!=null&&lstChildren.size()>0){
JTextComponent editor=lstChildren.get(0);
addFocusListener(共享_实例);
}
}
}
公共静态列表findAllChildren(JComponent组件,类clazz){
列表lstChildren=新的ArrayList(5);
对于(组件comp:Component.getComponents()){
if(类别持续时间(补偿)){
添加((T)comp);
}else if(JComponent的组件实例){
lstChildren.addAll(findAllChildren((JComponent)comp,clazz));
}
}
返回集合。不可修改列表(lstChildren);
}
公共静态类SelectOnFocusGainedHandler扩展了FocusAdapter{
@凌驾
获得公共无效焦点(焦点事件e){
组件组件=e.getComponent();
if(JTextComponent的组件实例){
最终JTextComponent text组件=(JTextComponent)组件;
新线程(newrunnable()){
@凌驾
公开募捐{
试一试{
睡眠(25);
}捕获(中断异常例外){
}
SwingUtilities.invokeLater(新的Runnable(){
@凌驾
公开募捐{
textComponent.selectAll();
}
});
}
}).start();
}
}
}
}
现在,就在此时此刻,我祈祷我们可以设置一些非常好的、简单的、未记录的属性,这意味着我们不需要做所有这些:p不知道Mac,但我在Windows上使用了以下代码:
JSpinner.DefaultEditor editor = (JSpinner.DefaultEditor)spinner.getEditor();
JTextField textField = editor.getTextField();
textField.addFocusListener( new FocusAdapter()
{
public void focusGained(final FocusEvent e)
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
JTextField tf = (JTextField)e.getSource();
tf.selectAll();
}
});
}
});
我还使用此代码在JFormattedTextField上选择文本。这对我不起作用,但我做了一点测试,发现FocusGaven从未被调用。也许还有更大的问题?你没有跟踪变量?啊,事实上,问题是我