StyleConstants分配无法正常工作

StyleConstants分配无法正常工作

使用下面的代码,我试图根据发件人对消息进行对齐和着色。但是它立即应用颜色,但不立即应用对齐作为图片。

蓝色的来自发件人,必须在左边,红色的是其他发件人,必须在右边,服务器的橙色,必须居中。

java - Java JTextPane StyleConstants分配无法正常工作-LMLPHP

public void showMessage(String name, String message) {

    StyledDocument doc = txt_showMessage.getStyledDocument();

    SimpleAttributeSet left = new SimpleAttributeSet();
    StyleConstants.setAlignment(left, StyleConstants.ALIGN_LEFT);
    StyleConstants.setForeground(left, Color.RED);
    StyleConstants.setFontSize(left, 14);

    SimpleAttributeSet right = new SimpleAttributeSet();
    StyleConstants.setAlignment(right, StyleConstants.ALIGN_RIGHT);
    StyleConstants.setForeground(right, Color.BLUE);
    StyleConstants.setFontSize(right, 14);

    SimpleAttributeSet center = new SimpleAttributeSet();
    StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
    StyleConstants.setForeground(center, Color.ORANGE);

    try {
        if (c.getServerName().equals(name)) {
            doc.insertString(doc.getLength(), new SimpleDateFormat("HH:mm").format(new Date()) + " " + name + ": " + message + "\n", center);
            doc.setParagraphAttributes(doc.getLength(), 1, center, false);
        } else if (c.getName().equals(name)) //if message is from same client
        {
            doc.insertString(doc.getLength(), new SimpleDateFormat("HH:mm").format(new Date()) + " " + name + ": " + message + "\n", right);
            doc.setParagraphAttributes(doc.getLength(), 1, right, false);

        } else {        //if message is from another client
            doc.insertString(doc.getLength(), new SimpleDateFormat("HH:mm").format(new Date()) + " " + name + ": " + message + "\n", left);
            doc.setParagraphAttributes(doc.getLength(), 1, left, false);
        }
    } catch (BadLocationException e) {
        System.out.println("Cannot write message");
    }
}

最佳答案

您只能为最后一段调用setParagraphAttributes()(doc.getLength()和size = 1)。而是存储消息起始偏移量并将段落属性应用于插入的文本

int offset = doc.getLength();
String message = new SimpleDateFormat("HH:mm").format(new Date()) + " " + name + ": " + message + "\n"

doc.insertString(doc.getLength(), message, center);
doc.setParagraphAttributes(offset, message.length() , center, false);

关于java - Java JTextPane StyleConstants分配无法正常工作,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37376267/

10-11 01:17