예제 #1
0
  /** This internal method begins a new page and prints the header. */
  protected void newpage() {
    page = job.getGraphics(); // Begin the new page
    linenum = 0;
    charnum = 0; // Reset line and char number
    pagenum++; // Increment page number
    page.setFont(headerfont); // Set the header font.
    page.drawString(jobname, x0, headery); // Print job name left justified

    String s = "- " + pagenum + " -"; // Print the page number centered.
    int w = headermetrics.stringWidth(s);
    page.drawString(s, x0 + (this.width - w) / 2, headery);
    w = headermetrics.stringWidth(time); // Print date right justified
    page.drawString(time, x0 + width - w, headery);

    // Draw a line beneath the header
    int y = headery + headermetrics.getDescent() + 1;
    page.drawLine(x0, y, x0 + width, y);

    // Set the basic monospaced font for the rest of the page.
    page.setFont(font);
  }
예제 #2
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  /**
   * The constructor for this class has a bunch of arguments: The frame argument is required for all
   * printing in Java. The jobname appears left justified at the top of each printed page. The font
   * size is specified in points, as on-screen font sizes are. The margins are specified in inches
   * (or fractions of inches).
   */
  public HardcopyWriter(
      Frame frame,
      String jobname,
      int fontsize,
      double leftmargin,
      double rightmargin,
      double topmargin,
      double bottommargin)
      throws HardcopyWriter.PrintCanceledException {
    // Get the PrintJob object with which we'll do all the printing.
    // The call is synchronized on the static printprops object, which
    // means that only one print dialog can be popped up at a time.
    // If the user clicks Cancel in the print dialog, throw an exception.
    Toolkit toolkit = frame.getToolkit(); // get Toolkit from Frame
    synchronized (printprops) {
      job = toolkit.getPrintJob(frame, jobname, printprops);
    }
    if (job == null) throw new PrintCanceledException("User cancelled print request");

    pagesize = job.getPageDimension(); // query the page size
    pagedpi = job.getPageResolution(); // query the page resolution

    // Bug Workaround:
    // On windows, getPageDimension() and getPageResolution don't work, so
    // we've got to fake them.
    if (System.getProperty("os.name").regionMatches(true, 0, "windows", 0, 7)) {
      // Use screen dpi, which is what the PrintJob tries to emulate, anyway
      pagedpi = toolkit.getScreenResolution();
      System.out.println(pagedpi);
      // Assume a 8.5" x 11" page size.  A4 paper users have to change this.
      pagesize = new Dimension((int) (8.5 * pagedpi), 11 * pagedpi);
      System.out.println(pagesize);
      // We also have to adjust the fontsize.  It is specified in points,
      // (1 point = 1/72 of an inch) but Windows measures it in pixels.
      fontsize = fontsize * pagedpi / 72;
      System.out.println(fontsize);
      System.out.flush();
    }

    // Compute coordinates of the upper-left corner of the page.
    // I.e. the coordinates of (leftmargin, topmargin).  Also compute
    // the width and height inside of the margins.
    x0 = (int) (leftmargin * pagedpi);
    y0 = (int) (topmargin * pagedpi);
    width = pagesize.width - (int) ((leftmargin + rightmargin) * pagedpi);
    height = pagesize.height - (int) ((topmargin + bottommargin) * pagedpi);

    // Get body font and font size
    font = new Font("Monospaced", Font.PLAIN, fontsize);
    metrics = toolkit.getFontMetrics(font);
    lineheight = metrics.getHeight();
    lineascent = metrics.getAscent();
    charwidth = metrics.charWidth('0'); // Assumes a monospaced font!

    // Now compute columns and lines will fit inside the margins
    chars_per_line = width / charwidth;
    lines_per_page = height / lineheight;

    // Get header font information
    // And compute baseline of page header: 1/8" above the top margin
    headerfont = new Font("SansSerif", Font.ITALIC, fontsize);
    headermetrics = toolkit.getFontMetrics(headerfont);
    headery = y0 - (int) (0.125 * pagedpi) - headermetrics.getHeight() + headermetrics.getAscent();

    // Compute the date/time string to display in the page header
    DateFormat df = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.SHORT);
    df.setTimeZone(TimeZone.getDefault());
    time = df.format(new Date());

    this.jobname = jobname; // save name
    this.fontsize = fontsize; // save font size
  }
예제 #3
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 /**
  * This is the close() method that all Writer subclasses must implement. Print the pending page
  * (if any) and terminate the PrintJob.
  */
 public void close() {
   synchronized (this.lock) {
     if (page != null) page.dispose(); // Send page to the printer
     job.end(); // Terminate the job
   }
 }