我有一个JTextPane（1），另一个是它的旁边（2）。我已同步它们，如果在（2）中输入一行，则在（1）中输入一行，但是当我插入图像（24px）时，（2）自动调整行长度，但（1）不会当然要调整大小。
如何制作“何时（2）调整大小，调整大小（1）”的方法？
我已尝试在（2）中插入图像，在（1）中插入黑色图像（1px，24px），但问题是如果在（2）中插入了许多图像，转到一个新行，其中（1）只是将它们添加到一行上，（1）获得一个水平滚动条。对不起，但我不能缩短它......
public class SSCCE extends JFrame {
private JPanel contentPane;
int wrapme=0;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
SSCCE frame = new SSCCE();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public SSCCE() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 338);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JScrollPane scrollName = new JScrollPane();
scrollName.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
scrollName.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollName.setBounds(10, 11, 99, 207);
contentPane.add(scrollName);
final JTextPane name = new JTextPane();
name.setEditable(false);
scrollName.setViewportView(name);
JScrollPane scrollChat = new JScrollPane();
scrollChat.setBounds(114, 11, 310, 207);
contentPane.add(scrollChat);
final JTextPane chat = new JTextPane();
chat.setText("Enter something!");
chat.setEditable(false);
scrollChat.setViewportView(chat);
scrollChat.getVerticalScrollBar().setModel(scrollName.getVerticalScrollBar().getModel());
final JTextArea chatEnter = new JTextArea();
chatEnter.setBounds(10, 229, 414, 60);
contentPane.add(chatEnter);
final StyledDocument nameDoc = name.getStyledDocument();
final StyledDocument chatDoc = chat.getStyledDocument();
final SimpleAttributeSet right = new SimpleAttributeSet();
StyleConstants.setForeground(right, Color.GRAY);
StyleConstants.setAlignment(right, StyleConstants.ALIGN_RIGHT);
nameDoc.setParagraphAttributes(0, nameDoc.getLength(), right, false);
final String TEXT_SUBMIT = "text-submit";
KeyStroke enter = KeyStroke.getKeyStroke("ENTER");
InputMap input = chatEnter.getInputMap();
ActionMap actions = chatEnter.getActionMap();
input.put(enter, TEXT_SUBMIT);
actions.put(TEXT_SUBMIT, new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
try {
String s = chatEnter.getText();
s=s.replaceAll(":\\)", ":\\) ");
s=s.replaceAll(" ", " ");
//new line in name
String text = chatDoc.getText(0, chatDoc.getLength());
int count = 1;
int i = text.indexOf("\n");
while(i>=0){
count++;
i=text.indexOf("\n", i + 2);
}
int totalCharacters = chat.getText().length();
int lineCount = (totalCharacters == 0) ? 1 : 0;
try {
int offset = totalCharacters; // arbitrary non-zero number
while (offset > 0) {
offset = Utilities.getRowStart(chat, offset) - 1;
lineCount++;
}
} catch (BadLocationException ex) {
ex.printStackTrace();
}
lineCount-=wrapme;
while(count!=lineCount) {
nameDoc.insertString(nameDoc.getLength(), "\n", right);
count++;
wrapme++;
}
//new line in name End
nameDoc.insertString(nameDoc.getLength(), "Martin\n", right);
chatDoc.insertString(chatDoc.getLength(), s + "\n", null);
chat.select(chatDoc.getLength(), chatDoc.getLength());
name.select(nameDoc.getLength(), nameDoc.getLength());
} catch (BadLocationException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
((AbstractDocument) chat.getDocument()).addDocumentListener(new DocumentListener() {
@Override
public void insertUpdate(final DocumentEvent de) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
StyledDocument doc = (StyledDocument) de.getDocument();
int start = Utilities.getRowStart(chat, Math.max(0, de.getOffset() - 1));
int end = Utilities.getWordStart(chat, de.getOffset() + de.getLength());
String text = doc.getText(start, (end - start)+1);
int i = text.indexOf(":)");
while (i >= 0) {
final SimpleAttributeSet attrs = new SimpleAttributeSet(doc.getCharacterElement(start + i).getAttributes());
if (StyleConstants.getIcon(attrs) == null) {
StyleConstants.setIcon(attrs, new new ImageIcon(ChatFrame.class.getResource("/smile.png")));
doc.remove(start + i, 2);
doc.insertString(start + i, ":)", attrs);
StyleConstants.setIcon(attrs, new ImageIcon(ChatFrame.class.getResource("/spacer.png")));
nameDoc.insertString(nameDoc.getLength()-6," ", attrs); //6 is "Martin" length
}
i = text.indexOf(":)", i + 2);
}
} catch (BadLocationException ex) {
ex.printStackTrace();
}
}
});
}
@Override
public void removeUpdate(DocumentEvent e) {
}
@Override
public void changedUpdate(DocumentEvent e) {
}
});
}
}
smile.png http://postimage.org/image/vm7e4gvp1/ spacer.png http://postimage.org/image/k0q09iq6l/
答案 0 :(得分：1)
对于发送的每封邮件，可能最好使用一个主JTextPane（聊天）和多个单独的JTextPanes（或甚至标签）。然后，您可以控制设置所需高度的单个消息标签（或文本窗格）。
可以计算高度，将消息开始和结束偏移传递给modelToView()方法并计算差异。