UMLDiagramPanel.java 文件源码

public void print() {
  PrinterJob printJob = PrinterJob.getPrinterJob();
  printJob.setPrintable((g, format, page) -> {
    if (page > 0) {
      return Printable.NO_SUCH_PAGE;
    }
    // get the bounds of the component
    Rectangle drawingArea = getDrawingArea();
    double cHeight = drawingArea.getSize().getHeight();
    double cWidth = drawingArea.getSize().getWidth();
    // get the bounds of the printable area
    double pHeight = format.getImageableHeight();
    double pWidth = format.getImageableWidth();
    double pXStart = format.getImageableX();
    double pYStart = format.getImageableY();
    //find ratio
    double xRatio = pWidth / cWidth;
    double yRatio = pHeight / cHeight;
    Graphics2D g2d = (Graphics2D) g;
    //translate and scale accordingly
    g2d.translate(pXStart, pYStart);
    g2d.scale(xRatio, yRatio);
    paintDrawing(g2d, drawingArea.x, drawingArea.y);
    return Printable.PAGE_EXISTS;
  });
  if (printJob.printDialog()) {
    try {
      printJob.print();
    } catch (PrinterException e) {
      UIUtility.error(e.getMessage());
    }
  }
}