JSpinner:增加编辑器框的长度 [英] JSpinner: Increase length of editor box

问题描述

我有一个 JSpinner，它显示从 0.0 到 999.0 的十进制值.它似乎工作正常，除了在编辑器框中显示四位数长的数字时，例如 123.4；然后它剪掉了最后一位数字的一部分，因为它不够长.

I have a JSpinner that displays decimal values from 0.0 to 999.0. It seems to work fine, except for when it displays a number in the editor box that is four-digits long, such as 123.4; it then cuts off part of the final digit because it is not long enough.

所以我的问题是:有谁知道如何增加 JSpinner 的编辑器窗口的长度?

So my question is: Does anyone know how to increase the length of the editor window of a JSpinner?

谢谢！

推荐答案

您可以通过

• 首先在 JSpinner 上调用 getEditor() 以获取微调器的编辑器
• 将返回的对象转换为 JSpinner.DefaultEditor
• 然后调用 getTextField() 对此.然后你可以根据需要设置它的 preferredSize.

• First calling getEditor() on your JSpinner to get the spinner's editor
• cast the returned object to JSpinner.DefaultEditor
• Then call getTextField() on this. Then you can set it's preferredSize if desired.

不过，正如trashgod 所指出的，使用正确的布局是最重要的，确保您使用的布局是最好的可能是解决此问题的最佳方法.

as noted by trashgod though, using a proper layout is paramount and being sure that the layouts you use are the best is probably the best way to solve this issue.

编辑 2: 以上是错误的，因为设置文本字段的首选大小没有任何作用.但是，您可以设置编辑器本身的首选大小，这很有效.例如，

Edit 2: The above is wrong as setting the textfield's preferred size does nothing. You can however set the preferred size of the editor itself, and that works. e.g .,

import java.awt.Dimension;

import javax.swing.*;

public class SpinnerBigTextField {
   private static void createAndShowGui() {
      JSpinner spinner = new JSpinner(new SpinnerNumberModel(0.0, 0.0, 999.0,
            0.5));

      JPanel panel = new JPanel();
      panel.setPreferredSize(new Dimension(300, 100));
      panel.add(spinner);

      JComponent field = ((JSpinner.DefaultEditor) spinner.getEditor());
      Dimension prefSize = field.getPreferredSize();
      prefSize = new Dimension(200, prefSize.height);
      field.setPreferredSize(prefSize);

      JFrame frame = new JFrame("SpinnerBigTextField");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(panel);
      frame.pack();
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

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