我正在尝试创建一个即时通讯程序作为一种爱好项目。我一直在尝试设计用户界面,并一直在尝试使实际消息显示的原型工作。
目前,框架设置如下:
- JFrame内容窗格设置为使用Y_AXIS的JPanel,该JPanel使用BoxLayout。
- 内容面板包含要显示的TextMessage对象,这些对象单独添加到内容面板中。
TextMessage对象的设置如下:
- 消息和发送者字符串存储在扩展JTextPane并使用StyledDocument进行格式化的TextMessage对象内部。
- TextMessage放置在JPanel内,以便在BoxLayout中正确放置对象。 JPanel设置为FlowLayout,根据布尔值将TextMessage对象固定在JPanel的任一边缘。
到目前为止,一切都像我想要的那样工作,只有一个显着的例外。当我调整JFrame大小时,TextMessage对象不会调整大小,而是简单地消失在屏幕边缘。
期望结果:
实际结果:
JFrame类:
public class NewMain extends JFrame {
public NewMain() {
setTitle("SparrowIM Chat Bubble");
setPreferredSize(new Dimension(880, 550));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setResizable(true);
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
setContentPane(panel);
add(new TextMessage("Hey, man. What's up?", "Jnk1296", true));
add(new TextMessage("Eh, nothing much.", "KeepJ96", false));
add(new TextMessage("Wbu? Anything new going on with you?", "KeepJ96", false));
add(new TextMessage("Nah, not really. Got a job interview coming up in a few " +
"days, though. Sorta excited for that, but sorta not. " +
"Other than that, life as usual. xD", "Jnk1296", true));
add(new TextMessage("lol Sounds good.", "KeepJ96", false));
add(new TextMessage("Yeah. How's the wife and kids, though?", "Jnk1296", true));
add(new TextMessage("Sarah still griping at you to get the roof patched up?", "Jnk1296", true));
add(new TextMessage("lol you could say that...", "KeepJ96", false));
pack();
setVisible(true);
}
public static void main(String[] args) {
new NewMain();
}
}
TextMessage对象(TextMessageContent的JPanel容器):
public class TextMessage extends JPanel {
private TextMessageContent content;
public TextMessage(String sender, String message, boolean localMessage) {
setBorder(new EmptyBorder(5, 5, 5, 5));
if (localMessage) {
setLayout(new FlowLayout(FlowLayout.RIGHT, 0, 0));
} else {
setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
}
this.content = new TextMessageContent(sender, message, localMessage);
add(content);
}
public TextMessageContent getContent() {
return this.content;
}
}
TextMessageContent Class: (JTextPane)
public class TextMessageContent extends JTextPane {
private static final long serialVersionUID = -8296129524381168509L;
private String sender;
private String message;
private boolean isClient;
private Image background;
public TextMessageContent(String message, String sender, boolean isClient) {
// Define Data Points
this.message = message;
this.sender = sender;
this.isClient = isClient;
this.setEditable(false);
this.setOpaque(false);
this.setBorder(new EmptyBorder(7, 7, 7, 7));
// Fetch Background Image (Hard Location Temporary)
try {
if (this.isClient) {
background = ImageIO.read(
new File("/home/jacob/Desktop/orange.png"));
} else {
background = ImageIO.read(
new File("/home/jacob/Desktop/Green.png"));
}
} catch (Exception e) { return; }
// Create Text Styles
StyledDocument doc = getStyledDocument();
// Create Default Base Style
Style def = StyleContext.getDefaultStyleContext()
.getStyle(StyleContext.DEFAULT_STYLE);
Style regular = doc.addStyle("regular", def);
// Create Body Style
Style body = doc.addStyle("message", regular);
StyleConstants.setFontFamily(body, "Verdana");
StyleConstants.setFontSize(body, 12);
// Create Sender Style
Style foot = doc.addStyle("sender", body);
StyleConstants.setFontSize(foot, 9);
// Build Document
try {
doc.insertString(0, this.message + "\n", body);
doc.insertString(doc.getLength(), this.sender + " - " +
getSystemTime(), foot);
} catch (BadLocationException e) {
e.printStackTrace();
}
}
@Override
public void paintComponent(Graphics g) {
background = ImageUtil.stretch(background, new Insets(5, 5, 5, 5),
new Dimension(getWidth(), getHeight()),
BufferedImage.TYPE_INT_ARGB);
g.drawImage(background, 0, 0, null);
super.paintComponent(g);
}
private String getSystemTime() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("h:mm a");
return sdf.format(cal.getTime());
}
}
我读到过将JTextPane直接添加到容器中的方法,但是在这种情况下,包装文本消息内容的JPanel仍然是必要的,以避免内容面板的BoxLayout使文本消息填满整个面板。
有什么建议吗?
TextPanePerfectSize
。 - trashgod