一侧使LineBorder变厚 [英] Swing LineBorder thicker on one side

问题描述

左侧明显较厚.使用无光泽边框不会产生这种情况.我想知道的是为什么LineBorder会创建这个而不是MatteBorder.

Noticeably thicker on the left side. Using a Matte Border does not produce this. What I want to know is why LineBorder would create this and not MatteBorder.

这是一个放置在JPanel中的JButton，然后将其添加到JFrame中.

This is a JButton being placed in a JPanel which is then being added to a JFrame.

相关代码:

package test;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.border.LineBorder;



public class View extends JPanel{ 

    public View(){
        JPanel displayPanel = new JPanel();
        displayPanel.setBackground(Color.WHITE);
        displayPanel.setSize(500, 500);

        JButton backspace = createButton("\u2190", "backspace", Color.RED, null, new Controller());

        backspace.setOpaque(false);
        backspace.setSize(25, 25);
        backspace.setBorder(new LineBorder(Color.RED, 1));
        backspace.setMinimumSize(new Dimension(25, 25));
        backspace.setPreferredSize(new Dimension(25, 25));

        displayPanel.add(backspace);

        add(displayPanel);
    }


   private JButton createButton (String text, String ac, Color fg, Color bg, ActionListener handler){
       JButton button = new JButton();
       button.setText(text);
       button.setForeground(fg);
       button.setBackground(bg);
       if (ac!= null){
           button.setActionCommand(ac);
       }
       button.setFont(new Font(button.getFont().getName(), button.getFont().getStyle(), 20));
       button.addActionListener(handler);
       return button;
   }

    private class Controller implements ActionListener{

        @Override
        public void actionPerformed(ActionEvent e) {
            String foo = e.getSource().toString();
            System.out.println(foo);
            //display.setText(button.getActionListeners().toString());

        }

    }

}

主要:

package test;

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class Foo{
       public static void main (String args[]){
            final int height = 400;
            final int width =  330;
            Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
            EventQueue.invokeLater(new Runnable(){


        @Override
        public void run() {
         JFrame frame = new JFrame();
         frame.setSize(330, 400);

         frame.setLocation((screen.width - width )/2, (screen.height - height)/2);
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setResizable(false);
         frame.setContentPane(new View());
         frame.setVisible(true);    
       }
      });   
     }
    }

如果我将其切换为

  backspace.setBorder(new MatteBorder(1, 1, 1, 1, Color.RED));

根据需要显示.

是什么导致LineBorder中的厚度不一致?

What is causing the thickness inconsistency in LineBorder?

推荐答案

在百灵鸟上，决定从我的构建路径中删除1.8，然后重新添加相同的库.按钮现在可以正常绘制了.

On a lark, decided to remove 1.8 from my buildpath and then re-add the same Library back. Button draws fine now.

这是在Eclipse Luna中，众所周知，它具有一些buildpath怪癖(例如，除非您也执行上述技巧，否则JavaFX无法正确导入.)

This is in Eclipse Luna, which is known to have some buildpath quirks (such as JavaFX not importing properly unless you do the above trick as well. )

这篇关于一侧使LineBorder变厚的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！