Ben*_*e89 4 java swing dom jeditorpane word-wrap
首先,我希望这不是一个问题,我开始了一个新主题.Tbh我不知道如何根据已经回答的问题提出问题,所以我做了这个.
我是Java的新手,我的问题如下.我正在写一个小聊天程序和我使用的是JEditorPane与HTMLEditorKit以不同颜色显示文本,显示表情,并显示超链接.
我的问题是,经过一些研究后我发现问题可能是由于Java7,我无法让线路正常工作.我希望文本自动换行并在超出组件宽度的字符串中间换行.自动换行工作正常,但是如果有人输入一个很长的字符串,那么JEditorPane扩展后你需要调整框架大小以使屏幕上显示所有内容,这是我不希望发生的事情.
我已经为这个问题尝试了一些修复,但是它们只允许字母换行,这样自动换行不再有效.除此之外,我希望用户能够通过按Enter键来包装他的文本.为此,我将\n添加到文本和修复程序,这将不再影响结果,所有内容将显示在一行中.
我觉得我已经花了多年时间在网上寻找解决方案但是现在没有任何方法可以解决我的问题,特别是因为它似乎一直都是同样的解决方案.我希望你们能帮助我.
这意味着总结:
是)我有的:
我需要的:
我尝试了什么,没有帮助:
jtextpane不包装文本, JTextPane不包装文本
这是一些自己尝试的代码.左下角是输入区域,用于输入某些文本.您还可以通过按Enter键添加换行.单击按钮后,您将看到上面区域中的文本.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.TitledBorder;
import javax.swing.text.BadLocationException;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;
@SuppressWarnings("serial")
public class LineWrapTest extends JFrame implements ActionListener, KeyListener {
private JButton btnSend;
private JTextArea textAreaIn;
private JEditorPane textAreaOut;
private HTMLEditorKit kit;
private HTMLDocument doc;
public LineWrapTest() {
this.setSize(600, 500);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setTitle("Linewrap Test");
}
/**
* Not important for problem
*/
public void paintScreen() {
this.setLayout(new BorderLayout());
this.add(this.getPanelOut(), BorderLayout.CENTER);
this.add(this.getPanelIn(), BorderLayout.SOUTH);
this.textAreaIn.requestFocusInWindow();
this.setVisible(true);
}
/**
* Not important for problem
*
* @return panelOut
*/
private JPanel getPanelOut() {
JPanel panelOut = new JPanel();
panelOut.setLayout(new BorderLayout());
this.textAreaOut = new JEditorPane();
this.textAreaOut.setEditable(false);
this.textAreaOut.setContentType("text/html");
this.kit = new HTMLEditorKit();
this.doc = new HTMLDocument();
StyleSheet styleSheet = this.kit.getStyleSheet();
this.kit.setStyleSheet(styleSheet);
this.textAreaOut.setEditorKit(this.kit);
this.textAreaOut.setDocument(this.doc);
TitledBorder border = BorderFactory.createTitledBorder("Output");
border.setTitleJustification(TitledBorder.CENTER);
panelOut.setBorder(border);
panelOut.add(this.textAreaOut);
return panelOut;
}
/**
* Not important for problem
*
* @return panelIn
*/
private JPanel getPanelIn() {
JPanel panelIn = new JPanel();
panelIn.setLayout(new BorderLayout());
this.textAreaIn = new JTextArea();
this.textAreaIn.setLineWrap(true);
this.textAreaIn.setWrapStyleWord(true);
TitledBorder border = BorderFactory.createTitledBorder("Input");
border.setTitleJustification(TitledBorder.CENTER);
panelIn.setBorder(border);
panelIn.add(this.getBtnSend(), BorderLayout.EAST);
panelIn.add(this.textAreaIn, BorderLayout.CENTER);
return panelIn;
}
/**
* Not important for problem
*
* @return btnSend
*/
private JButton getBtnSend() {
this.btnSend = new JButton("Send");
this.btnSend.addActionListener(this);
return this.btnSend;
}
private void append(String text) {
try {
this.kit.insertHTML(this.doc, this.doc.getLength(), text, 0, 0, null);
} catch (BadLocationException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String getHTMLText() {
String txtIn = this.textAreaIn.getText().trim().replaceAll(SEPARATOR, "<br/>");
StringBuffer htmlBuilder = new StringBuffer();
htmlBuilder.append("<HTML>");
htmlBuilder.append(txtIn);
htmlBuilder.append("</HTML>");
return htmlBuilder.toString();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == this.btnSend) {
this.append(this.getHTMLText());
this.textAreaIn.setText("");
this.textAreaIn.requestFocusInWindow();
}
}
public static void main(String[] args) {
LineWrapTest test = new LineWrapTest();
test.paintScreen();
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER)
if (!this.textAreaIn.getText().trim().isEmpty())
this.textAreaIn.setText(this.textAreaIn.getText() + SEPARATOR);
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
}
}
更新: 基于http://java-sl.com/tip_java7_text_wrapping_bug_fix.html的某些部分
不知怎的,我想出来更接近我的目标.我试图将HTMLEditorKit的修复程序与StlyedEditorKit修复程序结合起来.但我必须说实话,我不知道我实际上在那里做了什么:(可悲的是,手动线包装不再用它作为HTMLEditorKit的替代品.也许你可以用它作为一个一些更好的实施基础.
要在我的示例中使用它,只需使用CustomEditorKit在项目中创建一个新类,并使用此CustomEditorKit替换示例中的HTMLEditorKit.您会注意到单词和字母包装现在可以正常工作,但是如果您点击ENTER以获得自己的换行符,则此更改将不再出现在输出面板中,并且所有内容都将显示在一行中.另一个奇怪的问题是,如果你调整框架大小,线条有时会相互叠加.
import javax.swing.SizeRequirements;
import javax.swing.text.Element;
import javax.swing.text.View;
import javax.swing.text.ViewFactory;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.ParagraphView;
@SuppressWarnings("serial")
public class CustomEditorKit extends HTMLEditorKit {
@Override
public ViewFactory getViewFactory() {
return new HTMLFactory() {
@Override
public View create(Element e) {
View v = super.create(e);
if (v instanceof InlineView) {
return new InlineView(e) {
@Override
public int getBreakWeight(int axis, float pos, float len) {
return GoodBreakWeight;
}
@Override
public View breakView(int axis, int p0, float pos, float len) {
if (axis == View.X_AXIS) {
this.checkPainter();
this.removeUpdate(null, null, null);
}
return super.breakView(axis, p0, pos, len);
}
};
}
else if (v instanceof ParagraphView) {
return new ParagraphView(e) {
@Override
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
}
float pref = this.layoutPool.getPreferredSpan(axis);
float min = this.layoutPool.getMinimumSpan(axis);
// Don't include insets, Box.getXXXSpan will include them.
r.minimum = (int) min;
r.preferred = Math.max(r.minimum, (int) pref);
r.maximum = Integer.MAX_VALUE;
r.alignment = 0.5f;
return r;
}
};
}
return v;
}
};
}
}
好!所以,我终于得到了你工作上遇到的所有问题.它花了一些研究和大量的试验和错误,但这里是:
这是我做的:
所以这是代码.它有点长,您可能希望根据您的喜好进行更改.我评论了我做出改变的地方并尝试解释它们.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.SizeRequirements;
import javax.swing.border.TitledBorder;
import javax.swing.text.*;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.StyleSheet;
@SuppressWarnings("serial")
public class LineWrapTest extends JFrame implements ActionListener, KeyListener {
//This is the separator.
private String SEPARATOR = System.getProperty("line.separator");
private JButton btnSend;
private JTextArea textAreaIn;
private JEditorPane textAreaOut;
private JScrollPane outputScrollPane;
private HTMLEditorKit kit;
private HTMLDocument doc;
public LineWrapTest() {
this.setSize(600, 500);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setTitle("Linewrap Test");
}
/**
* Not important for problem
*/
public void paintScreen() {
this.setLayout(new BorderLayout());
this.add(this.getPanelOut(), BorderLayout.CENTER);
this.add(this.getPanelIn(), BorderLayout.SOUTH);
this.textAreaIn.requestFocusInWindow();
this.setVisible(true);
}
/**
* Not important for problem
*
* @return panelOut
*/
private JPanel getPanelOut() {
JPanel panelOut = new JPanel();
panelOut.setLayout(new BorderLayout());
this.textAreaOut = new JEditorPane();
this.textAreaOut.setEditable(false);
this.textAreaOut.setContentType("text/html");
//I added this scroll pane.
this.outputScrollPane = new JScrollPane(this.textAreaOut);
/*
* This is a whole whack of code. It's a combination of two sources.
* It achieves the wrapping you desire: by word and longgg strings
* It is a custom addition to HTMLEditorKit
*/
this.kit = new HTMLEditorKit(){
@Override
public ViewFactory getViewFactory(){
return new HTMLFactory(){
public View create(Element e){
View v = super.create(e);
if(v instanceof InlineView){
return new InlineView(e){
public int getBreakWeight(int axis, float pos, float len) {
//return GoodBreakWeight;
if (axis == View.X_AXIS) {
checkPainter();
int p0 = getStartOffset();
int p1 = getGlyphPainter().getBoundedPosition(this, p0, pos, len);
if (p1 == p0) {
// can't even fit a single character
return View.BadBreakWeight;
}
try {
//if the view contains line break char return forced break
if (getDocument().getText(p0, p1 - p0).indexOf(SEPARATOR) >= 0) {
return View.ForcedBreakWeight;
}
}
catch (BadLocationException ex) {
//should never happen
}
}
return super.getBreakWeight(axis, pos, len);
}
public View breakView(int axis, int p0, float pos, float len) {
if (axis == View.X_AXIS) {
checkPainter();
int p1 = getGlyphPainter().getBoundedPosition(this, p0, pos, len);
try {
//if the view contains line break char break the view
int index = getDocument().getText(p0, p1 - p0).indexOf(SEPARATOR);
if (index >= 0) {
GlyphView v = (GlyphView) createFragment(p0, p0 + index + 1);
return v;
}
}
catch (BadLocationException ex) {
//should never happen
}
}
return super.breakView(axis, p0, pos, len);
}
};
}
else if (v instanceof ParagraphView) {
return new ParagraphView(e) {
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
}
float pref = layoutPool.getPreferredSpan(axis);
float min = layoutPool.getMinimumSpan(axis);
// Don't include insets, Box.getXXXSpan will include them.
r.minimum = (int)min;
r.preferred = Math.max(r.minimum, (int) pref);
r.maximum = Integer.MAX_VALUE;
r.alignment = 0.5f;
return r;
}
};
}
return v;
}
};
}
};
this.doc = new HTMLDocument();
StyleSheet styleSheet = this.kit.getStyleSheet();
this.kit.setStyleSheet(styleSheet);
this.textAreaOut.setEditorKit(this.kit);
this.textAreaOut.setDocument(this.doc);
TitledBorder border = BorderFactory.createTitledBorder("Output");
border.setTitleJustification(TitledBorder.CENTER);
panelOut.setBorder(border);
//I changed this to add the scrollpane, which now contains
//the JEditorPane
panelOut.add(this.outputScrollPane);
return panelOut;
}
/**
* Not important for problem
*
* @return panelIn
*/
private JPanel getPanelIn() {
JPanel panelIn = new JPanel();
panelIn.setLayout(new BorderLayout());
this.textAreaIn = new JTextArea();
this.textAreaIn.setLineWrap(true);
this.textAreaIn.setWrapStyleWord(true);
//This disables enter from going to a new line. Your key listener does that.
this.textAreaIn.getInputMap().put(KeyStroke.getKeyStroke("ENTER"), "none");
//For the key listener to work, it needs to be added to the component
this.textAreaIn.addKeyListener(this);
TitledBorder border = BorderFactory.createTitledBorder("Input");
border.setTitleJustification(TitledBorder.CENTER);
panelIn.setBorder(border);
panelIn.add(this.getBtnSend(), BorderLayout.EAST);
panelIn.add(this.textAreaIn, BorderLayout.CENTER);
return panelIn;
}
/**
* Not important for problem
*
* @return btnSend
*/
private JButton getBtnSend() {
this.btnSend = new JButton("Send");
this.btnSend.addActionListener(this);
return this.btnSend;
}
private void append(String text) {
try {
this.kit.insertHTML(this.doc, this.doc.getLength(), text, 0, 0, null);
} catch (BadLocationException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String getHTMLText() {
//I tried to find a work around for this but I couldn't. It could be done
//by manipulating the HTMLDocument but it's beyond me. Notice I changed
//<br/> to <p/>. For some reason, <br/> no longer went to the next line
//when I added the custom wrap. <p/> seems to work though.
String txtIn = this.textAreaIn.getText().trim().replaceAll(SEPARATOR, "<p/>");
//My IDE recommends you use StringBuilder instead, that's up to you.
//I am not sure what the difference would be.
StringBuffer htmlBuilder = new StringBuffer();
htmlBuilder.append("<HTML>");
htmlBuilder.append(txtIn);
htmlBuilder.append("</HTML>");
return htmlBuilder.toString();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == this.btnSend) {
this.append(this.getHTMLText());
this.textAreaIn.setText("");
this.textAreaIn.requestFocusInWindow();
}
}
public static void main(String[] args) {
LineWrapTest test = new LineWrapTest();
test.paintScreen();
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER){
if (!this.textAreaIn.getText().trim().isEmpty()) {
//I made this work by defining the SEPARATOR.
//You could use append(Separator) instead if you want.
this.textAreaIn.setText(this.textAreaIn.getText() + SEPARATOR);
}
}
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
}
}
以下是(大部分)用于解决此问题的链接:
使用HTMLDocument在JTextPane中启用自动换行
自定义包装是这两者的组合:
http://java-sl.com/tip_html_letter_wrap.html
删除JTextArea的keybind:
http://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html
如果您有任何问题,请在下面发表评论.我会回答他们的.我真诚地希望这能解决你的问题
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