将语言环境正确设置为JFileChooser [英] Set locale properly to a JFileChooser

问题描述

在运行时更改语言环境时，我遇到了一个小问题.

I'm having a little problem when I change Locale at runtime.

目标

我必须根据配置文件更改应用程序语言的语言环境.

I have to change the Locale of my application language according to a configuration file.

此语言环境不一定与主机/OS语言环境相同，也不必与JVM默认语言环境相同.

This locale does not necessarily be the same of the host/OS locale nor the JVM default locale.

此外，调用应用程序时无法修改user.language.然后，我必须在运行时执行该操作.

Moreover, I can't modify user.language when I call the application. Then, I must do that at runtime.

问题

总结我的代码，我阅读了配置文件并获得了不同的选项(包括语言环境).之后，我根据这些配置的选项初始化应用程序环境.

Summarizing my code, I read the configuration file and get the different options (including locale). After that, I initialize the application environment according to these configured options.

之后，我构建框架并开始应用程序生命周期.

After, I build my frame and starts the application life-cycle.

public static void main(String[] args) {
    File fichier;
    Ini ini; //Ini4J object
    Modele modele = new Modele(); //My Model class: it stores configuration and other stuff
    try {
        fichier = new File(Modele.CONFIGURATION);
        ini = new Ini(fichier);
        modele.setLocaleLang(ini.get(Modele.LOCALE, Modele.LANG, String.class));
        // read more options
    } catch(InvalidFileFormatException e) {
        // exception processing
    } catch (IOException e) {
        // exception processing
    } finally {
        ini = null;
        fichier = null;
    }

    // More code
    JComponent.setDefaultLocale(modele.getLocaleLang());

    // More initialization code
    MyFrame fenetre = new MyFrame(modele);
    fenetre.visualiser();
}

在生命周期中，您可以打开文件.显然，我使用了JFileChooser来解决该问题:

Well, during the life-cycle, you can open files. Obviously, I use a JFileChooser for that issue:

JFileChooser jfc = new JFileChooser();
jfc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
jfc.setFileFilter(modele.FILTRE_OUVRIR);
jfc.showOpenDialog(null);

使用配置的语言环境设置的所有文件选择器，但类型选择器不会更改.下图显示了问题(操作系统语言环境:es_ES，配置的语言环境:fr_FR):

All the file chooser it's setted with the configured locale, but the type selector doesn't change. The following image shows the problem (OS Locale: es_ES, configured locale: fr_FR):

如您所见，在"Fichiers de type"组合框中:该选项以西班牙语而不是法语显示.

As you can see, in the combobox "Fichiers de type": the option is showed in Spanish instead of French.

请他人向我解释问题?我的代码有问题吗?由于我正在使用文件过滤器，因此可能会出现问题吗?

Colud someone explain me the problem? Is something wrong in my code? Could be a problem due to I'm using a file filter?

谢谢你的任何建议.

推荐答案

就像BasicFileChooserUI使用的acceptAllFilter中的错误一样，它不会查找文本的本地化版本:

Looks like a bug in the acceptAllFilter used by BasicFileChooserUI, it doesn't lookup the localized version of the text as it should:

// BasicFileChooserUI
/**
 * Returns the default accept all file filter
 */
public FileFilter getAcceptAllFileFilter(JFileChooser fc) {
    return acceptAllFileFilter;
}

// buggy acceptAllFilter: doens't respect locale
protected class AcceptAllFileFilter extends FileFilter {

    public AcceptAllFileFilter() {
    }

    public boolean accept(File f) {
        return true;
    }

    public String getDescription() {
        return UIManager.getString("FileChooser.acceptAllFileFilterText");
    }
}

如果您的模型返回null，则使用此默认值. (我看到的)唯一的出路是让模型返回一个执行正确操作的过滤器，例如f.i.:

This default is used if your model returns null. The only way out (that I see) is to let the model return a filter that does-the-right-thing, like f.i.:

protected class AcceptAllFileFilter extends FileFilter {

    private Locale locale;

    public AcceptAllFileFilter(Locale locale) {
        this.locale = locale;
    }

    @Override
    public boolean accept(File f) {
        return true;
    }

    @Override
    public String getDescription() {
        return UIManager.getString("FileChooser.acceptAllFileFilterText", locale);
    }
}

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