Java-允许在具有L& F物质的可编辑JComboBox中使用退格键 [英] Java - Allow using backspace in an editable JComboBox with Substance L&F

问题描述

我正在使用物质L& F，并且已将JComboBox设置为可编辑，以便可以从其弹出窗口中选择所需的值，或在其编辑器中键入一个新值.

I am using Substance L&F and I have set a JComboBox to editable so that i can select the value that i want from its popup, or type a new value in its Editor.

键入一个新值可以很好地工作，但是如果我想从Combo编辑器中删除未键入的字母，然后单击Backspace即可，它会在编辑器中选择字母而不是擦除它们.这是屏幕截图:

Typing a new value works fine, but if i want to delete a miss-typed letter from the Combo editor, and i click Backspace to do that it selects the letters in the editor instead of erasing them. Here is a screenshot :

我希望Combo编辑器在键入键盘字母或Backspace或Delete时像JTextField一样工作，有没有办法做到这一点?或者是什么原因造成的?

I want the Combo editor to work like a JTextField when typing keyboard letters or Backspace or Delete in it, so is there a way to do that ? Or what is causing this?

推荐答案

关于以下内容的重要性，请参见下文 SSCCE 而不是发生错误的一切都是错误，大多数情况下，您的实际代码中存在错误，而没有 SSCCE ，我们就是不是明智的人.

See below for the importance of an SSCCE not everything that goes wrong is a bug, most of the times it something wrong in your actual code, which without an SSCCE we are non the wiser.

似乎对我来说很好:

启动时:

选择JComboBox并按 Backspace 后:

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Test {

    public Test() {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);


                JComboBox jc = new JComboBox(new String[]{"Hello", "Bye", "World", "Cruel"});
                jc.setEditable(true);
                frame.add(jc);

                frame.pack();
                frame.setVisible(true);

            }
        });
    }

    public static void main(String[] args) {
        new Test();
    }
}

更新

根据您的评论:

我认为这不会很好！ ...这是物质上的问题； 我正在使用的L& F.

I did not think it would work fine ! ... It is a problem in Substance; the L&F i am using.

有关错误的详细信息，请参见下文:

See below for details on the Bug:

内容:可编辑的JComboBox不支持退格键

如上所述:

此行为是设计使然.这是物质的感觉"部分， 在可编辑的组合框上添加自动补全功能.

This behavior is by design. This is a "feel" part of Substance that adds auto-completion on editable comboboxes.

或者在此处中查看我的答案以了解更多信息L& F和/或制作自己的方式

Alternatively see my answer here for more L&Fs and/or a way to make your own

更新2 :

感谢@Brad(用于解密我从Substance:P链接的错误日志)，可以轻松地解决此问题:

Thanks to @Brad (for deciphering the bug log I linked from Substance :P) to fix this simply do:

UIManager.put( LafWidget.COMBO_BOX_NO_AUTOCOMPLETION, Boolean.TRUE ); 

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