焦点问题与Mac OSX上java7目录模式对话框 [英] Focus issues with java7 modal dialogs on mac osx
问题描述
我已经验证，关于一个小程序的Mac OSX上运行的Swing应用程序。
I've been validating a swing application that runs on an applet for mac osx.
在此确认，我发现了以下问题与模态对话框：
During this validation I found the following issues with the modal dialogs:
- 当一个对话框打开，是setModal（真），它可以阻止根窗口的内容，但如果你点击根窗口上的某个地方，在对话框的推移下，但它应保留在根窗口的顶部
- 如果该对话框中有一个JTextInputField它不接收焦点，甚至当你点击它。
所以，我创建了一个小程序，以显示该问题。你可以帮我了解什么是错在这里？
So I created a small program to show the problem. Can you please help me to understand what is wrong here?
package com.macosx.tests;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class DialogExample extends JApplet{
private static final long serialVersionUID = 1L;
private JPanel panel;
private JButton openDialogBtn;
private void doStart() {
panel = new JPanel();
panel.setPreferredSize(new Dimension(500,500));
openDialogBtn = new JButton("open dialog");
openDialogBtn.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
ModalDialog dialog = new ModalDialog(panel, true);
dialog.setVisible(true);
}
});
panel.add(openDialogBtn);
setContentPane(panel);
}
class ModalDialog extends JDialog {
private static final long serialVersionUID = 1L;
public ModalDialog(Component parent, boolean modal) {
Dimension dimensionParentFrame = parent.getSize();
setSize(new Dimension((parent == null) ? 300 : dimensionParentFrame.width / 2, 75));
setModal(modal);
setModalityType(ModalityType.APPLICATION_MODAL);
JTextField txtField = new JTextField();
add(txtField, BorderLayout.CENTER);
}
}
@Override
public void start() {
try {
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
doStart();
}
});
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
使用上面创建一个.jar文件（Test.jar的）。一旦做到这一点，创建一个包含以下内容的HTML文件：
Use the above to create a .jar file (test.jar). Once that is done, create a html file with the following content:
<html>
<head>
<title>Dialog test Applet</title>
</head>
<body>
<applet id="DialogTestApplet" height="800" width="600"
code="com.macosx.tests.DialogExample"
archive="test.jar">
</applet>
</div>
</body>
</html>
在这样做，运行HTML文件。你会看到一个小程序，具有灰色背景和一个按钮。然后尝试：
When this is done, run the html file. You'll see an applet with a gray background and with a button. Then try to:
- 单击按钮打开对话框。完成后，点击某处的灰色区域：在对话框云浏览器窗口下，但应保留在顶部，右侧 ？
- 单击按钮打开对话框。之后，单击对话框的文本框，并尝试写东西：textdialog没有收到焦点 。
那么，我究竟做错了什么？可有人用Mac电脑测试这个吗？
So, what am I doing wrong here? Can someone with a mac computer test this please?
感谢
规格：
java.vendor Oracle Corporation
java.version 1.7.0_07
os.name Mac OS X
os.version 10.7.4
browser firefox 15
注意：请注意，当小程序在浏览器上，只有在Mac OSX上运行，这只是发生
推荐答案
我发现了另外一个解决方法。当打开的窗口中，显示出几毫秒的选项窗格并关闭它。它给焦点和选项窗格，然后回到对话框，允许忽略错误。
I found another workaround. When the window is opened, show an optionpane for a few milliseconds and close it. It give the focus to the optionpane and then back to the dialog, allowing to ignore the bug.
code这个snipet添加到您的对话框的构造函数，它应该工作：
Add this snipet of code to your dialog constructor and it should work:
addWindowListener(new WindowAdapter(){
public void windowOpened(WindowEvent e){
JOptionPane pane = new JOptionPane();
final JDialog dialog = pane.createDialog("Please Wait");
Timer timer = new Timer(50, new ActionListener() {
public void actionPerformed(ActionEvent e) {
dialog.dispose();
}
});
timer.setRepeats(false);
timer.start();
dialog.setVisible(true);
}
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