Question

我正在尝试创建一个Java类，其中包含JLabel的JFrame将打印在完整的A5页面上（JFrame设置为A5页面的大小）

为了做到这一点，我已经使用了这个类

http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase/tutorial/2d/printing/examples/PrintUIWindow.java

这个我写过的课

public class test2 extends PrintUIWindow {

    public test2(JFrame f) {
        super(f);
        // TODO Auto-generated constructor stub
    }

    /**
     * @param args
     */
    public static void main(String[] args) 
    {
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        JFrame f=new JFrame ("hello");
        f.setLayout(null);
        f.setSize(420,595);
        JLabel test=new JLabel ("issuer");
        f.add(test);
        test.setBounds(new Rectangle(new Point(310, 50), test.getPreferredSize())); 
        f.setBackground(Color.white);
        f.setVisible(true); 
        PrintUIWindow p=new PrintUIWindow (f);
        p.actionPerformed(null);
    }
}

问题是，不是将整个JFrame打印到页面上，而是仅打印其中的一部分，其余部分不在页面边框

什么可以解决这个问题？

Answer 1

查看this

我也发现了这个：

public static class Printer implements Printable {
  final Component comp;

  public Printer(Component comp) {
    this.comp = comp;
  }

  @
  Override
  public int print(Graphics g, PageFormat format, int page_index)
  throws PrinterException {
    if (page_index > 0) {
      return Printable.NO_SUCH_PAGE;
    }

    // get the bounds of the component
    Dimension dim = comp.getSize();
    double cHeight = dim.getHeight();
    double cWidth = dim.getWidth();

    // get the bounds of the printable area
    double pHeight = format.getImageableHeight();
    double pWidth = format.getImageableWidth();

    double pXStart = format.getImageableX();
    double pYStart = format.getImageableY();

    double xRatio = pWidth / cWidth;
    double yRatio = pHeight / cHeight;


    Graphics2D g2 = (Graphics2D) g;
    g2.translate(pXStart, pYStart);
    g2.scale(xRatio, yRatio);
    comp.paint(g2);

    return Printable.PAGE_EXISTS;
  }
}

要使用Printer类打印帧，请尝试：

JFrame yourComponent = new JFrame();
PrinterJob pjob = PrinterJob.getPrinterJob();
PageFormat preformat = pjob.defaultPage();
preformat.setOrientation(PageFormat.LANDSCAPE);
PageFormat postformat = pjob.pageDialog(preformat);
if (preformat != postformat) {
  pjob.setPrintable(new Printer(yourComponent), postformat);
  if (pjob.printDialog()) {
    pjob.print();
  }
}

将JFrame打印到整页

1 个答案: