我目前正在尝试从Netbeans Platform API使用FileChooserBuilder。以下代码完成了netbeans模块的动作。运行时,它不会显示在窗口/屏幕的中心,而是显示在屏幕左下角的某处。是否有可能使该对话框显示在屏幕中间?
public final class LoadProjectAction implements ActionListener {
public void actionPerformed(ActionEvent e) {
File home = new File(
System.getProperty("user.home")
+ File.separator + "lib");
FileChooserBuilder fileChooserBuilder = new FileChooserBuilder(
LoadProjectAction.class);
fileChooserBuilder.setTitle("Load project");
fileChooserBuilder.setDefaultWorkingDirectory(home);
fileChooserBuilder.setApproveText("Load");
fileChooserBuilder.setDirectoriesOnly(true);
File directory = fileChooserBuilder.showOpenDialog();
if (directory != null) {
return; // nothing to do
}
// do some processing here
}
}
感谢您的想法。
最佳答案
找到了解决方案:
您必须获取JFileChooser实例并在其showOpenDialog方法中设置正确的父组件(然后将其相对于应用程序的主窗口放置)。但是,由于NetBeans尝试在线程上安全地工作-它仅允许一个线程访问组件,因此必须使用EventQueue.invokeLater。
public final class LoadProjectAction implements ActionListener {
public void actionPerformed(ActionEvent e) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
// output window
InputOutput io = IOProvider.getDefault().getIO("File search", true);
io.select();
// start in user home directory
File initialDirectory = new File(
System.getProperty("user.home")
+ File.separator + "lib");
FileChooserBuilder fileChooserBuilder = new FileChooserBuilder(
"LoadProjectAction");
fileChooserBuilder.setTitle("Load project");
fileChooserBuilder.setDefaultWorkingDirectory(initialDirectory);
fileChooserBuilder.setApproveText("Load");
fileChooserBuilder.setDirectoriesOnly(true);
JFileChooser jfc = fileChooserBuilder.createFileChooser();
int value = jfc.showOpenDialog(WindowManager.getDefault().getMainWindow());
if (value != JFileChooser.APPROVE_OPTION) {
return; // nothing to do
}
// process selection
}
});
}
}
关于java - FileChooserBuilder未显示在屏幕中央,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5596089/