Java tutorial
/* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions 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 Oracle or the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package misc; /* * TextAreaPrintingDemo.java requires the following files: * toprint.txt * guide.txt * images/print.png */ import java.awt.print.PrinterException; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.InputStreamReader; import javax.swing.*; import java.text.MessageFormat; import javax.xml.transform.Source; public class TextAreaPrintingDemo extends javax.swing.JFrame { public TextAreaPrintingDemo() { initComponents(); load(text, "toprint.txt"); load(guideText, "guide.txt"); } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents private void initComponents() { jScrollPane1 = new javax.swing.JScrollPane(); text = new javax.swing.JTextArea(); headerLabel = new javax.swing.JLabel(); headerField = new javax.swing.JTextField(); footerLabel = new javax.swing.JLabel(); footerField = new javax.swing.JTextField(); interactiveCheck = new javax.swing.JCheckBox(); printButton = new javax.swing.JButton(); guideText = new javax.swing.JTextArea(); backgroundCheck = new javax.swing.JCheckBox(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("TextAreaPrintingDemo"); text.setColumns(20); text.setRows(5); text.setMargin(new java.awt.Insets(2, 2, 2, 2)); jScrollPane1.setViewportView(text); headerLabel.setText("Header"); headerField.setText("William Shakespeare"); footerLabel.setText("Footer"); footerField.setText("Page {0}"); interactiveCheck.setSelected(true); interactiveCheck.setText("Show Progress Dialog"); interactiveCheck.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0)); printButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("images/print.png"))); printButton.setText("Print!"); printButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { print(evt); } }); guideText.setColumns(20); guideText.setEditable(false); guideText.setLineWrap(true); guideText.setRows(5); guideText.setWrapStyleWord(true); guideText.setOpaque(false); backgroundCheck.setSelected(true); backgroundCheck.setText("Print in Background"); backgroundCheck.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0)); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(guideText) .addGroup(layout.createSequentialGroup().addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(backgroundCheck, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(interactiveCheck, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent( printButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addGroup(layout.createSequentialGroup().addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) .addComponent(footerLabel, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(headerLabel, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(footerField).addComponent(headerField, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE)))) .addGap(15, 15, 15) .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 343, Short.MAX_VALUE) .addContainerGap())); layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addContainerGap().addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 403, Short.MAX_VALUE) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(guideText, javax.swing.GroupLayout.DEFAULT_SIZE, 260, Short.MAX_VALUE) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(headerLabel).addComponent(headerField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(footerLabel).addComponent(footerField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(27, 27, 27) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(interactiveCheck, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(backgroundCheck, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE)) .addComponent(printButton, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)))) .addContainerGap())); pack(); }// </editor-fold>//GEN-END:initComponents private void load(JTextArea comp, String fileName) { try { comp.read(new InputStreamReader(getClass().getResourceAsStream(fileName)), null); } catch (IOException ex) { // should never happen with the resources we provide ex.printStackTrace(); } } private void print(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_print MessageFormat header = createFormat(headerField); MessageFormat footer = createFormat(footerField); boolean interactive = interactiveCheck.isSelected(); boolean background = backgroundCheck.isSelected(); PrintingTask task = new PrintingTask(header, footer, interactive); if (background) { task.execute(); } else { task.run(); } }//GEN-LAST:event_print private class PrintingTask extends SwingWorker<Object, Object> { private final MessageFormat headerFormat; private final MessageFormat footerFormat; private final boolean interactive; private volatile boolean complete = false; private volatile String message; public PrintingTask(MessageFormat header, MessageFormat footer, boolean interactive) { this.headerFormat = header; this.footerFormat = footer; this.interactive = interactive; } @Override protected Object doInBackground() { try { complete = text.print(headerFormat, footerFormat, true, null, null, interactive); message = "Printing " + (complete ? "complete" : "canceled"); } catch (PrinterException ex) { message = "Sorry, a printer error occurred"; } catch (SecurityException ex) { message = "Sorry, cannot access the printer due to security reasons"; } return null; } @Override protected void done() { message(!complete, message); } } private MessageFormat createFormat(JTextField source) { String text = source.getText(); if (text != null && text.length() > 0) { try { return new MessageFormat(text); } catch (IllegalArgumentException e) { error("Sorry, this format is invalid."); } } return null; } private void message(boolean error, String msg) { int type = (error ? JOptionPane.ERROR_MESSAGE : JOptionPane.INFORMATION_MESSAGE); JOptionPane.showMessageDialog(this, msg, "Printing", type); } private void error(String msg) { message(true, msg); } public static void createAndShowGUI() { JFrame f = new TextAreaPrintingDemo(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String args[]) { SwingUtilities.invokeLater(new Runnable() { public void run() { //Turn off metal's use of bold fonts UIManager.put("swing.boldMetal", Boolean.FALSE); createAndShowGUI(); } }); } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JCheckBox backgroundCheck; private javax.swing.JTextField footerField; private javax.swing.JLabel footerLabel; private javax.swing.JTextArea guideText; private javax.swing.JTextField headerField; private javax.swing.JLabel headerLabel; private javax.swing.JCheckBox interactiveCheck; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JButton printButton; private javax.swing.JTextArea text; // End of variables declaration//GEN-END:variables }