TextSamplerDemopublic class TextSamplerDemo extends JFrame implements ActionListener
| Fields Summary |
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| private String | newline | | protected static final String | textFieldString | | protected static final String | passwordFieldString | | protected JLabel | actionLabel |
| Constructors Summary |
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public TextSamplerDemo()
super("TextSamplerDemo");
//Create a regular text field.
JTextField textField = new JTextField(10);
textField.setActionCommand(textFieldString);
textField.addActionListener(this);
//Create a password field.
JPasswordField passwordField = new JPasswordField(10);
passwordField.setActionCommand(passwordFieldString);
passwordField.addActionListener(this);
//Create some labels for the fields.
JLabel textFieldLabel = new JLabel(textFieldString + ": ");
textFieldLabel.setLabelFor(textField);
JLabel passwordFieldLabel = new JLabel(passwordFieldString + ": ");
passwordFieldLabel.setLabelFor(passwordField);
//Create a label to put messages during an action event.
actionLabel = new JLabel("Type text and then Return in a field.");
actionLabel.setBorder(BorderFactory.createEmptyBorder(10,0,0,0));
//Lay out the text controls and the labels.
JPanel textControlsPane = new JPanel();
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
textControlsPane.setLayout(gridbag);
JLabel[] labels = {textFieldLabel, passwordFieldLabel};
JTextField[] textFields = {textField, passwordField};
addLabelTextRows(labels, textFields, gridbag, textControlsPane);
c.gridwidth = GridBagConstraints.REMAINDER; //last
c.anchor = GridBagConstraints.WEST;
c.weightx = 1.0;
gridbag.setConstraints(actionLabel, c);
textControlsPane.add(actionLabel);
textControlsPane.setBorder(
BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Text Fields"),
BorderFactory.createEmptyBorder(5,5,5,5)));
//Create a text area.
JTextArea textArea = new JTextArea(
"This is an editable JTextArea " +
"that has been initialized with the setText method. " +
"A text area is a \"plain\" text component, " +
"which means that although it can display text " +
"in any font, all of the text is in the same font."
);
textArea.setFont(new Font("Serif", Font.ITALIC, 16));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
JScrollPane areaScrollPane = new JScrollPane(textArea);
areaScrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
areaScrollPane.setPreferredSize(new Dimension(250, 250));
areaScrollPane.setBorder(
BorderFactory.createCompoundBorder(
BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Plain Text"),
BorderFactory.createEmptyBorder(5,5,5,5)),
areaScrollPane.getBorder()));
//Create an editor pane.
JEditorPane editorPane = createEditorPane();
JScrollPane editorScrollPane = new JScrollPane(editorPane);
editorScrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
editorScrollPane.setPreferredSize(new Dimension(250, 145));
editorScrollPane.setMinimumSize(new Dimension(10, 10));
//Create a text pane.
JTextPane textPane = createTextPane();
JScrollPane paneScrollPane = new JScrollPane(textPane);
paneScrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
paneScrollPane.setPreferredSize(new Dimension(250, 155));
paneScrollPane.setMinimumSize(new Dimension(10, 10));
//Put the editor pane and the text pane in a split pane.
JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
editorScrollPane,
paneScrollPane);
splitPane.setOneTouchExpandable(true);
JPanel rightPane = new JPanel();
rightPane.add(splitPane);
rightPane.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Styled Text"),
BorderFactory.createEmptyBorder(5,5,5,5)));
//Put everything in the applet.
JPanel leftPane = new JPanel();
BoxLayout leftBox = new BoxLayout(leftPane, BoxLayout.Y_AXIS);
leftPane.setLayout(leftBox);
leftPane.add(textControlsPane);
leftPane.add(areaScrollPane);
JPanel contentPane = new JPanel();
BoxLayout box = new BoxLayout(contentPane, BoxLayout.X_AXIS);
contentPane.setLayout(box);
contentPane.add(leftPane);
contentPane.add(rightPane);
setContentPane(contentPane);
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| Methods Summary |
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| public void | actionPerformed(java.awt.event.ActionEvent e)
String prefix = "You typed \"";
if (e.getActionCommand().equals(textFieldString)) {
JTextField source = (JTextField)e.getSource();
actionLabel.setText(prefix + source.getText() + "\"");
} else {
JPasswordField source = (JPasswordField)e.getSource();
actionLabel.setText(prefix + new String(source.getPassword())
+ "\"");
}
| | private void | addLabelTextRows(javax.swing.JLabel[] labels, javax.swing.JTextField[] textFields, java.awt.GridBagLayout gridbag, java.awt.Container container)
GridBagConstraints c = new GridBagConstraints();
c.anchor = GridBagConstraints.EAST;
int numLabels = labels.length;
for (int i = 0; i < numLabels; i++) {
c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last
c.fill = GridBagConstraints.NONE; //reset to default
c.weightx = 0.0; //reset to default
gridbag.setConstraints(labels[i], c);
container.add(labels[i]);
c.gridwidth = GridBagConstraints.REMAINDER; //end row
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 1.0;
gridbag.setConstraints(textFields[i], c);
container.add(textFields[i]);
}
| | private javax.swing.JEditorPane | createEditorPane()
JEditorPane editorPane = new JEditorPane();
editorPane.setEditable(false);
String s = null;
try {
s = "file:"
+ System.getProperty("user.dir")
+ System.getProperty("file.separator")
+ "TextSamplerDemoHelp.html";
URL helpURL = new URL(s);
displayURL(helpURL, editorPane);
} catch (Exception e) {
System.err.println("Couldn't create help URL: " + s);
}
return editorPane;
| | private javax.swing.JTextPane | createTextPane()
JTextPane textPane = new JTextPane();
String[] initString =
{ "This is an editable JTextPane, ", //regular
"another ", //italic
"styled ", //bold
"text ", //small
"component, ", //large
"which supports embedded components..." + newline,//regular
" " + newline, //button
"...and embedded icons..." + newline, //regular
" ", //icon
newline + "JTextPane is a subclass of JEditorPane that " +
"uses a StyledEditorKit and StyledDocument, and provides " +
"cover methods for interacting with those objects."
};
String[] initStyles =
{ "regular", "italic", "bold", "small", "large",
"regular", "button", "regular", "icon",
"regular"
};
initStylesForTextPane(textPane);
Document doc = textPane.getDocument();
try {
for (int i=0; i < initString.length; i++) {
doc.insertString(doc.getLength(), initString[i],
textPane.getStyle(initStyles[i]));
}
} catch (BadLocationException ble) {
System.err.println("Couldn't insert initial text.");
}
return textPane;
| | private void | displayURL(java.net.URL url, javax.swing.JEditorPane editorPane)
try {
editorPane.setPage(url);
} catch (IOException e) {
System.err.println("Attempted to read a bad URL: " + url);
}
| | protected void | initStylesForTextPane(javax.swing.JTextPane textPane)
//Initialize some styles.
Style def = StyleContext.getDefaultStyleContext().
getStyle(StyleContext.DEFAULT_STYLE);
Style regular = textPane.addStyle("regular", def);
StyleConstants.setFontFamily(def, "SansSerif");
Style s = textPane.addStyle("italic", regular);
StyleConstants.setItalic(s, true);
s = textPane.addStyle("bold", regular);
StyleConstants.setBold(s, true);
s = textPane.addStyle("small", regular);
StyleConstants.setFontSize(s, 10);
s = textPane.addStyle("large", regular);
StyleConstants.setFontSize(s, 16);
s = textPane.addStyle("icon", regular);
StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
StyleConstants.setIcon(s, new ImageIcon("images/Pig.gif"));
s = textPane.addStyle("button", regular);
StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
JButton button = new JButton(new ImageIcon("images/sound.gif"));
button.setMargin(new Insets(0,0,0,0));
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Toolkit.getDefaultToolkit().beep();
}
});
StyleConstants.setComponent(s, button);
| | public static void | main(java.lang.String[] args)
JFrame frame = new TextSamplerDemo();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.pack();
frame.setVisible(true);
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