gcc/libjava/classpath/javax/print/ServiceUI.java

/* ServiceUI.java -- 
   Copyright (C) 2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
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package javax.print;

import gnu.javax.print.PrinterDialog;

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.util.Arrays;

import javax.print.attribute.PrintRequestAttributeSet;

/**
 * <code>ServiceUI</code> provides a method to create a graphical 
 * print dialog.
 * <p>
 * The graphical print dialog enables the user to browse the available
 * print services on the system. It provides user interfaces to interact 
 * with the most common printing attributes likes specifying the number of 
 * copies to print or the page ranges.
 * </p><p>
 * The initial appearance of the print dialog as shown to the user may be 
 * specified by providing the default selected print service as well as 
 * initial values for the printing attributes in the user interface.
 * </p>
 * 
 * @author Wolfgang Baer (WBaer@gmx.de)
 */
public class ServiceUI
{

  /**
   * Default constructor.
   */
  public ServiceUI()
  {
    // nothing to do here - only one static method
  }
  
  /**
   * Creates a modal graphical printing dialog at the specified location on 
   * the screen.
   * <p>
   * The dialog will return the user selected print service and the given 
   * attributes set will contain the modified printing attributes. If the 
   * user cancels the printing dialog <code>null</code> will be returned and 
   * the printing attributes set will be unmodified.
   * </p><p>
   * The values of the given attributes set (if not empty) will be displayed
   * initially unless the are unsupported by the print service. If a print 
   * service does not support a particular value it is substituted with the
   * default value of the print service.
   * </p> 
   * 
   * @param gc the screen to use. <code>null</code> is default screen.
   * @param x the coordinate of the upper left edge of the dialog in screen 
   *   coordinates (not relative to the parent frame).
   * @param y the coordinate of the upper left edge of the dialog in screen 
   *   coordinates (not relative to the parent frame).
   * @param services the print services to browse (not null).
   * @param defaultService the default service. If <code>null</code>
   * the first of the print services in the services array will be used.
   * @param flavor the flavours to be printed.
   * @param attributes the attributes requested. Will be updated 
   * by selections done by the user in the dialog. 
   * 
   * @return The selected print service or <code>null</code> if user
   * has cancelled the printer dialog.
   * 
   * @throws HeadlessException if GraphicsEnvironment is headless
   * @throws IllegalArgumentException if services is <code>null</code> or an 
   * empty array, attributes are <code>null</code> or the given default 
   * <code>PrintService<code> is not part of the print service array.
   */
  public static PrintService printDialog(GraphicsConfiguration gc, int x, 
      int y, PrintService[] services, PrintService defaultService,
      DocFlavor flavor, PrintRequestAttributeSet attributes)
    throws HeadlessException
    {       
      if (GraphicsEnvironment.isHeadless())
        throw new HeadlessException("GraphicsEnvironment is headless.");
      
      if (services == null || services.length == 0 || attributes == null)
        throw new IllegalArgumentException("Given print service array / " 
                                           + "attributes may not be null");
      
      if (defaultService != null && 
          ! Arrays.asList(services).contains(defaultService))
        throw new IllegalArgumentException("defaultService is not contained " 
                                           + " in the print service array");
      
      PrinterDialog dialog = new PrinterDialog(gc, services, defaultService, 
                                               flavor, attributes);
      
      dialog.setLocation(x, y);
      dialog.show();
      
      return dialog.getSelectedPrintService();
    }
}