Text Components Sampler Demo : TextArea « Swing JFC « Java

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Java » Swing JFC » TextAreaScreenshots 
Text Components Sampler Demo
Text Components Sampler Demo
 
/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

/*
 * TextSamplerDemo.java is a 1.4 application that requires the following files:
 * TextSamplerDemoHelp.html (which references images/dukeWaveRed.gif)
 * images/Pig.gif images/sound.gif
 */

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JEditorPane;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.swing.text.StyledDocument;

public class TextSamplerDemo extends JPanel implements ActionListener {
  private String newline = "\n";

  protected static final String textFieldString = "JTextField";

  protected static final String passwordFieldString = "JPasswordField";

  protected static final String ftfString = "JFormattedTextField";

  protected static final String buttonString = "JButton";

  protected JLabel actionLabel;

  public TextSamplerDemo() {
    setLayout(new BorderLayout());

    //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 a formatted text field.
    JFormattedTextField ftf = new JFormattedTextField(java.util.Calendar
        .getInstance().getTime());
    ftf.setActionCommand(textFieldString);
    ftf.addActionListener(this);

    //Create some labels for the fields.
    JLabel textFieldLabel = new JLabel(textFieldString + ": ");
    textFieldLabel.setLabelFor(textField);
    JLabel passwordFieldLabel = new JLabel(passwordFieldString + ": ");
    passwordFieldLabel.setLabelFor(passwordField);
    JLabel ftfLabel = new JLabel(ftfString + ": ");
    ftfLabel.setLabelFor(ftf);

    //Create a label to put messages during an action event.
    actionLabel = new JLabel("Type text and then Enter in a field.");
    actionLabel.setBorder(BorderFactory.createEmptyBorder(10000));

    //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, ftfLabel };
    JTextField[] textFields = textField, passwordField, ftf };
    addLabelTextRows(labels, textFields, gridbag, textControlsPane);

    c.gridwidth = GridBagConstraints.REMAINDER; //last
    c.anchor = GridBagConstraints.WEST;
    c.weightx = 1.0;
    textControlsPane.add(actionLabel, c);
    textControlsPane.setBorder(BorderFactory.createCompoundBorder(
        BorderFactory.createTitledBorder("Text Fields"), BorderFactory
            .createEmptyBorder(5555)));

    //Create a text area.
    JTextArea textArea = new JTextArea("This is an editable JTextArea. "
        "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(250250));
    areaScrollPane.setBorder(BorderFactory.createCompoundBorder(
        BorderFactory.createCompoundBorder(BorderFactory
            .createTitledBorder("Plain Text"), BorderFactory
            .createEmptyBorder(5555)), areaScrollPane
            .getBorder()));

    //Create an editor pane.
    JEditorPane editorPane = createEditorPane();
    JScrollPane editorScrollPane = new JScrollPane(editorPane);
    editorScrollPane
        .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    editorScrollPane.setPreferredSize(new Dimension(250145));
    editorScrollPane.setMinimumSize(new Dimension(1010));

    //Create a text pane.
    JTextPane textPane = createTextPane();
    JScrollPane paneScrollPane = new JScrollPane(textPane);
    paneScrollPane
        .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    paneScrollPane.setPreferredSize(new Dimension(250155));
    paneScrollPane.setMinimumSize(new Dimension(1010));

    //Put the editor pane and the text pane in a split pane.
    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
        editorScrollPane, paneScrollPane);
    splitPane.setOneTouchExpandable(true);
    splitPane.setResizeWeight(0.5);
    JPanel rightPane = new JPanel(new GridLayout(10));
    rightPane.add(splitPane);
    rightPane.setBorder(BorderFactory.createCompoundBorder(BorderFactory
        .createTitledBorder("Styled Text"), BorderFactory
        .createEmptyBorder(5555)));

    //Put everything together.
    JPanel leftPane = new JPanel(new BorderLayout());
    leftPane.add(textControlsPane, BorderLayout.PAGE_START);
    leftPane.add(areaScrollPane, BorderLayout.CENTER);

    add(leftPane, BorderLayout.LINE_START);
    add(rightPane, BorderLayout.LINE_END);
  }

  private void addLabelTextRows(JLabel[] labels, JTextField[] textFields,
      GridBagLayout gridbag, 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
      container.add(labels[i], c);

      c.gridwidth = GridBagConstraints.REMAINDER; //end row
      c.fill = GridBagConstraints.HORIZONTAL;
      c.weightx = 1.0;
      container.add(textFields[i], c);
    }
  }

  public void actionPerformed(ActionEvent e) {
    String prefix = "You typed \"";
    if (textFieldString.equals(e.getActionCommand())) {
      JTextField source = (JTextFielde.getSource();
      actionLabel.setText(prefix + source.getText() "\"");
    else if (passwordFieldString.equals(e.getActionCommand())) {
      JPasswordField source = (JPasswordFielde.getSource();
      actionLabel.setText(prefix + new String(source.getPassword())
          "\"");
    else if (buttonString.equals(e.getActionCommand())) {
      Toolkit.getDefaultToolkit().beep();
    }
  }

  private JEditorPane createEditorPane() {
    JEditorPane editorPane = new JEditorPane();
    editorPane.setEditable(false);
    java.net.URL helpURL = TextSamplerDemo.class
        .getResource("TextSamplerDemoHelp.html");
    if (helpURL != null) {
      try {
        editorPane.setPage(helpURL);
      catch (IOException e) {
        System.err.println("Attempted to read a bad URL: " + helpURL);
      }
    else {
      System.err.println("Couldn't find file: TextSampleDemoHelp.html");
    }

    return editorPane;
  }

  private JTextPane createTextPane() {
    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" };

    JTextPane textPane = new JTextPane();
    StyledDocument doc = textPane.getStyledDocument();
    addStylesToDocument(doc);

    try {
      for (int i = 0; i < initString.length; i++) {
        doc.insertString(doc.getLength(), initString[i], doc
            .getStyle(initStyles[i]));
      }
    catch (BadLocationException ble) {
      System.err.println("Couldn't insert initial text into text pane.");
    }

    return textPane;
  }

  protected void addStylesToDocument(StyledDocument doc) {
    //Initialize some styles.
    Style def = StyleContext.getDefaultStyleContext().getStyle(
        StyleContext.DEFAULT_STYLE);

    Style regular = doc.addStyle("regular", def);
    StyleConstants.setFontFamily(def, "SansSerif");

    Style s = doc.addStyle("italic", regular);
    StyleConstants.setItalic(s, true);

    s = doc.addStyle("bold", regular);
    StyleConstants.setBold(s, true);

    s = doc.addStyle("small", regular);
    StyleConstants.setFontSize(s, 10);

    s = doc.addStyle("large", regular);
    StyleConstants.setFontSize(s, 16);

    s = doc.addStyle("icon", regular);
    StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
    ImageIcon pigIcon = createImageIcon("images/Pig.gif""a cute pig");
    if (pigIcon != null) {
      StyleConstants.setIcon(s, pigIcon);
    }

    s = doc.addStyle("button", regular);
    StyleConstants.setAlignment(s, StyleConstants.ALIGN_CENTER);
    ImageIcon soundIcon = createImageIcon("images/sound.gif""sound icon");
    JButton button = new JButton();
    if (soundIcon != null) {
      button.setIcon(soundIcon);
    else {
      button.setText("BEEP");
    }
    button.setCursor(Cursor.getDefaultCursor());
    button.setMargin(new Insets(0000));
    button.setActionCommand(buttonString);
    button.addActionListener(this);
    StyleConstants.setComponent(s, button);
  }

  /** Returns an ImageIcon, or null if the path was invalid. */
  protected static ImageIcon createImageIcon(String path, String description) {
    java.net.URL imgURL = TextSamplerDemo.class.getResource(path);
    if (imgURL != null) {
      return new ImageIcon(imgURL, description);
    else {
      System.err.println("Couldn't find file: " + path);
      return null;
    }
  }

  /**
   * Create the GUI and show it. For thread safety, this method should be
   * invoked from the event-dispatching thread.
   */
  private static void createAndShowGUI() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);

    //Create and set up the window.
    JFrame frame = new JFrame("TextSamplerDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JComponent newContentPane = new TextSamplerDemo();
    newContentPane.setOpaque(true)//content panes must be opaque
    frame.setContentPane(newContentPane);

    //Display the window.
    frame.pack();
    frame.setVisible(true);
  }

  public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        createAndShowGUI();
      }
    });
  }
}

           
         
  
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