JTextPane - 换行

Question

我正在使用文字处理器，我希望允许用户执行所有文字处理器允许他们执行的操作。我现在的问题是试图了解一旦达到最大宽度（帧的大小），如何强制用户写入的文本到下一行。例如，如果我正在写一个句子（或关于堆栈溢出的问题），一旦我的文本到达文本区域的边界，它就会自动将我带到下一行而不按Enter / return。在对线条包装进行一些研究后，我遇到了以下情况 http://www.java-forums.org/awt-swing/59790-line-wrapping-jtextpane.html Toggling text wrap in a JTextpane

然而我似乎无法从下面的JTextPane获得我想要的行为是我的代码，因为我总是欣赏任何提供的帮助。

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;


public class WordFrame{

    private JFrame appFrame;
    private JMenuBar menuBar;
    private JMenu fileMenu, editMenu, viewMenu;
    JMenuItem saveMenuItem, openMenuItem, newMenuItem, exitMenuItem, fontMenuItem;
    JTextPane textArea = new JTextPane();
    static final int WIDTH = 1280, HEIGHT = 980;
    private JScrollPane scrollBar = new JScrollPane(textArea);
    JPanel wordPanel = new JPanel();
    JFileChooser fileChooser = new JFileChooser();
    private int textHeight = 12;
    private Font defaultFont = new Font(Font.SANS_SERIF, 2, textHeight);

    public WordFrame(){
        appFrame = new JFrame();
        setUI();
        addMenuBar();   
        textArea.setFont(defaultFont);


    }
    public JFrame getAppFrame(){
        return appFrame;
    }
    public void setFrameVisibility(boolean isVisible){
        if(isVisible == true){
            appFrame.setVisible(true);
        }
        else{
            appFrame.setVisible(false);
        }
    }
    public void setUI(){
        appFrame.setTitle("Word Processor");
        appFrame.setIconImage(new ImageIcon(this.getClass().getResource("Bridge.jpg")).getImage());
        appFrame.setSize(WIDTH, HEIGHT);
        appFrame.setLocation(0,0);
        appFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        scrollBar.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
//      scrollbar.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        wordPanel.setLayout(new BorderLayout());

        appFrame.add(wordPanel);
        textArea.setPreferredSize(new Dimension(400,500));
        appFrame.add(scrollBar);
        wordPanel.add(textArea);
        scrollBar.setViewportView(wordPanel);


    }

    public void addMenuBar(){
        menuBar = new JMenuBar();
        fileMenu = new JMenu(" File ");
        editMenu = new JMenu("Edit ");
        viewMenu = new JMenu("View ");

        newMenuItem = new JMenuItem("New");
        fileMenu.add(newMenuItem);
        fileMenu.addSeparator();
        fileMenu.setMnemonic('f');

        openMenuItem = new JMenuItem("Open");

        fileMenu.add(openMenuItem);

        saveMenuItem = new JMenuItem("Save");
        fileMenu.add(saveMenuItem);

        fileMenu.addSeparator();
        exitMenuItem = new JMenuItem("Exit");
        fileMenu.add(exitMenuItem);

        fontMenuItem = new JMenuItem("Font");
        editMenu.add(fontMenuItem);
        menuBar.add(fileMenu);
        menuBar.add(editMenu);
        menuBar.add(viewMenu);      
        appFrame.setJMenuBar(menuBar);
    }

    public void setFontSize(int i){
        this.textHeight = i;        
    }
    public void addListener(ActionListener listener){
        openMenuItem.addActionListener(listener);
        exitMenuItem.addActionListener(listener);
        saveMenuItem.addActionListener(listener);
    }
}

插入我在互联网上找到的代码后。一旦边缘（右）被文本击中，文本就会换行（基本上如果它到达应用程序屏幕的最右边，它会自动下降到一个新行。但是出现了一个新问题，这涉及到JScrollBar，因为每个人都会期待，一旦文本点击应用程序屏幕的底部，滚动条就会更新，以便用户能够向上和向下滚动页面，这是有道理的，但是我的代码不允许这样做。这是我之后的修改后的代码尝试修复换行问题（我仍然认为这是同一个问题），如果以下内容被注释掉，文字换行不再起作用，则会更多

textArea.setPreferredSize(new Dimension(400,500));

那里的代码导致文本换行完全失败。

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;


public class WordFrame{

    private JFrame appFrame;
    private JMenuBar menuBar;
    private JMenu fileMenu, editMenu, viewMenu;
    JMenuItem saveMenuItem, openMenuItem, newMenuItem, exitMenuItem, fontMenuItem;
    JTextPane textArea = new JTextPane();
    static final int WIDTH = 1280, HEIGHT = 980;
    private JScrollPane scrollBar = new JScrollPane(textArea);
    JPanel wordPanel = new JPanel();
    JFileChooser fileChooser = new JFileChooser();
    private int textHeight = 12;
    private Font defaultFont = new Font(Font.SANS_SERIF, 2, textHeight);

    public WordFrame(){
        appFrame = new JFrame();
        setUI();
        addMenuBar();   
        textArea.setFont(defaultFont);


    }
    public JFrame getAppFrame(){
        return appFrame;
    }
    public void setFrameVisibility(boolean isVisible){
        if(isVisible == true){
            appFrame.setVisible(true);
        }
        else{
            appFrame.setVisible(false);
        }
    }
    public void setUI(){
        appFrame.setTitle("Word Processor");
        appFrame.setIconImage(new ImageIcon(this.getClass().getResource("Bridge.jpg")).getImage());
        appFrame.setSize(WIDTH, HEIGHT);
        appFrame.setLocation(0,0);
        appFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        scrollBar.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        scrollBar.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        wordPanel.setLayout(new BorderLayout());
//  appFrame.getContentPane().add(scrollBar, BorderLayout.CENTER);
        textArea.setPreferredSize(new Dimension(400,500));
        appFrame.add(wordPanel);
        appFrame.add(scrollBar);
        wordPanel.add(textArea);
//      appFrame.add(textArea);


        scrollBar.setViewportView(wordPanel);
        textArea.setEditorKit(new WrapEditorKit());

    }

    public void addMenuBar(){
        menuBar = new JMenuBar();
        fileMenu = new JMenu(" File ");
        editMenu = new JMenu("Edit ");
        viewMenu = new JMenu("View ");

        newMenuItem = new JMenuItem("New");
        fileMenu.add(newMenuItem);
        fileMenu.addSeparator();
        fileMenu.setMnemonic('f');

        openMenuItem = new JMenuItem("Open");

        fileMenu.add(openMenuItem);

        saveMenuItem = new JMenuItem("Save");
        fileMenu.add(saveMenuItem);

        fileMenu.addSeparator();
        exitMenuItem = new JMenuItem("Exit");
        fileMenu.add(exitMenuItem);

        fontMenuItem = new JMenuItem("Font");
        editMenu.add(fontMenuItem);
        menuBar.add(fileMenu);
        menuBar.add(editMenu);
        menuBar.add(viewMenu);      
        appFrame.setJMenuBar(menuBar);
    }

    public void setFontSize(int i){
        this.textHeight = i;        
    }
    public void addListener(ActionListener listener){
        openMenuItem.addActionListener(listener);
        exitMenuItem.addActionListener(listener);
        saveMenuItem.addActionListener(listener);
        fontMenuItem.addActionListener(listener);
    }
    class WrapEditorKit extends StyledEditorKit {
        ViewFactory defaultFactory=new WrapColumnFactory();
        public ViewFactory getViewFactory() {
            return defaultFactory;
        }

    }

    class WrapColumnFactory implements ViewFactory {
        public View create(Element elem) {
            String kind = elem.getName();
            if (kind != null) {
                if (kind.equals(AbstractDocument.ContentElementName)) {
                    return new WrapLabelView(elem);
                } else if (kind.equals(AbstractDocument.ParagraphElementName)) {
                    return new ParagraphView(elem);
                } else if (kind.equals(AbstractDocument.SectionElementName)) {
                    return new BoxView(elem, View.Y_AXIS);
                } else if (kind.equals(StyleConstants.ComponentElementName)) {
                    return new ComponentView(elem);
                } else if (kind.equals(StyleConstants.IconElementName)) {
                    return new IconView(elem);
                }
            }

            // default to text display
            return new LabelView(elem);
        }
    }

    class WrapLabelView extends LabelView {
        public WrapLabelView(Element elem) {
            super(elem);
        }

        public float getMinimumSpan(int axis) {
            switch (axis) {
                case View.X_AXIS:
                    return 0;
                case View.Y_AXIS:
                    return super.getMinimumSpan(axis);
                default:
                    throw new IllegalArgumentException("Invalid axis: " + axis);
            }
        }

    }
}