Created
June 8, 2016 21:05
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ChatGUIMockup - Java 8 - Swing
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To compile: | |
$ javac ChatGUIMockup.java | |
To run: | |
$ java ChatGUIMockup |
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import java.awt.Dimension; | |
import java.awt.GridBagConstraints; | |
import java.awt.GridBagLayout; | |
import java.awt.KeyboardFocusManager; | |
import java.awt.event.KeyEvent; | |
import javax.swing.JButton; | |
import javax.swing.JFrame; | |
import javax.swing.JLabel; | |
import javax.swing.JPanel; | |
import javax.swing.JScrollPane; | |
import javax.swing.JTextArea; | |
import javax.swing.JTextField; | |
public class ChatGUIMockup extends JFrame { | |
private JPanel panel; | |
private JLabel chatLogLabel = null; | |
private JTextArea chatLogTextArea = null; | |
private JScrollPane chatLogScrollPane = null; | |
private JLabel messageLabel = null; | |
private JTextField messageTextField = null; | |
private JButton sendButton = null; | |
public static final Dimension WINDOW_SIZE = new Dimension(500, 300); | |
public ChatGUIMockup() { | |
// Basic window configuration: | |
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); | |
this.setPreferredSize(WINDOW_SIZE); | |
this.setMinimumSize(WINDOW_SIZE); | |
setUpGUI(); | |
} | |
private static GridBagConstraints gbc() { | |
return new GridBagConstraints(); | |
} | |
private void setUpGUI() { | |
panel = new JPanel(); | |
this.add(panel); | |
GridBagLayout gridLayout = new GridBagLayout(); | |
panel.setLayout(gridLayout); | |
GridBagConstraints con; | |
{ | |
chatLogLabel = new JLabel("Chat log:"); | |
con = gbc(); | |
con.gridx = 0; | |
con.gridy = 0; | |
con.fill = GridBagConstraints.HORIZONTAL; | |
con.anchor = GridBagConstraints.WEST; | |
con.weighty = 0.05; | |
panel.add(chatLogLabel, con); | |
} | |
{ | |
chatLogTextArea = new JTextArea(); | |
chatLogTextArea.setEditable(false); | |
chatLogScrollPane = new JScrollPane( | |
chatLogTextArea, | |
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, | |
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); | |
con = gbc(); | |
con.gridx = 0; | |
con.gridy = 1; | |
con.gridwidth = 3; | |
con.weighty = 0.9; | |
con.weightx = 1.0; | |
con.fill = GridBagConstraints.BOTH; | |
con.anchor = GridBagConstraints.WEST; | |
panel.add(chatLogScrollPane, con); | |
} | |
{ | |
messageLabel = new JLabel("Message:"); | |
con = gbc(); | |
con.gridx = 0; | |
con.gridy = 2; | |
con.weightx = 0.2; | |
con.weighty = 0.05; | |
con.anchor = GridBagConstraints.WEST; | |
panel.add(messageLabel, con); | |
} | |
{ | |
messageTextField = new JTextField(); | |
con = gbc(); | |
con.gridx = 1; | |
con.gridy = 2; | |
con.weightx = 0.6; | |
con.weighty = 0.05; | |
con.ipadx = 200; | |
con.anchor = GridBagConstraints.WEST; | |
panel.add(messageTextField, con); | |
} | |
{ | |
sendButton = new JButton("Send"); | |
sendButton.addActionListener(e -> { | |
String msg = messageTextField.getText(); | |
postMessage(msg); | |
}); | |
con = gbc(); | |
con.gridx = 1; | |
con.gridy = 2; | |
con.weightx = 0.2; | |
con.weighty = 0.05; | |
con.anchor = GridBagConstraints.EAST; | |
panel.add(sendButton, con); | |
} | |
} | |
private void postMessage(String msg) { | |
if (!msg.equals("")) { | |
chatLogTextArea.append(String.format("Me: %s%n", msg)); | |
messageTextField.setText(""); | |
messageTextField.grabFocus(); | |
} | |
} | |
public void start() { | |
this.pack(); | |
KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(e -> { | |
if (e.getKeyCode() == KeyEvent.VK_ENTER) { | |
if (messageTextField.hasFocus()) { | |
String msg = messageTextField.getText(); | |
postMessage(msg); | |
} | |
} | |
return false; | |
}); | |
messageTextField.grabFocus(); | |
this.setVisible(true); | |
} | |
public static void main(String [] args) { | |
ChatGUIMockup app = new ChatGUIMockup(); | |
app.start(); | |
} | |
} |
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