printmanager.java

WAP ide 代码

package wapide;

import javax.swing.*;
import java.awt.print.*;
import java.awt.*;
import javax.swing.*;
import java.util.*;

/**
 * The Print Manager for the IDE and other programs.  Currently
 * only the IDEFrame classes has support for printing.  The only printing this
 * class is capable of is the printing of graphics controls, such as JTextPane's.
 * In the future text support will be built in to the class so that
 * proper formatted text can be printed by the IDE and the other
 * classes.
 * Copyright:    Copyright (c) 2003
 * @author Mark Busman
 * @version 1.0
 *
 * For License and contact information see WAPIDE.java
 */

public class PrintManager implements Printable {

  private PageFormat documentPageFormat = new PageFormat();
  private PrinterJob printJob = PrinterJob.getPrinterJob();
  private Component componentToBePrinted;


  /**
   * Constructs a new PrintManager.
   */
  public PrintManager() {

  }

  /**
   * Sets the graphics component.
   */
  public void setComponent(Component c) {
    this.componentToBePrinted = c;
  }

  /**
   * Shows the printer setup dialog.
   */
  public void showPageSetup() {
    documentPageFormat = printJob.pageDialog (documentPageFormat);
  }

  /**
   * Not yet implemented...
   */
  public void print() {
    //super.print();
  }

  /**
   * Not yet implemented...
   */
  public void printText(JTextPane thePane, Vector attribVector) {
    // format text using attributed string
  }

  /**
   * Not yet implemented...
   */
  public void printText(String theText, boolean printPortait) {
    // plain black and white text
  }

  /**
   * Print a graphical component, such as a JTextPane's contents.  Prints as
   * a graphical image, not text.
   */
  public void printGraphics() {
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog())
      try {
        printJob.print();
      } catch(PrinterException pe) {
        JOptionPane.showConfirmDialog(null, "Error Printing: " + pe, "Printer Error", JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE);
      }
  }

  /**
   * Print a graphical component, such as a JTextPane's contents.  Prints as
   * a graphical image, not text.  Allows for some user options.
   * @param Graphics g - the graphical context.
   * @param PageFormat format - the page orientation, ,argins, etc.
   * @param int pageIndex - the page number(s) to print.
   */
  public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
    if (pageIndex > 0) {
      return(NO_SUCH_PAGE);
    } else {
      Graphics2D g2d = (Graphics2D)g;
      g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
      disableDoubleBuffering(componentToBePrinted);
      componentToBePrinted.paint(g2d);
      enableDoubleBuffering(componentToBePrinted);
      return(PAGE_EXISTS);
    }
  }

  /**
   * Overridden to provide better functionality.
   */
  public static void disableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(false);
  }

  /**
   * Overridden to provide better functionality.
   */
  public static void enableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(true);
  }
}