-2

这是可以打印表单的代码。由马蒂霍尔创建。我只是想问一下，每当我单击打印表单中的“确定”按钮时，我是否可以编码，您可以在其中设置要打印的表单的属性，我该怎么做？在这段代码的哪一部分？对不起，如果我不能让自己清楚。XD

package thesis;

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

/** A simple utility class that lets you very simply print
 *  an arbitrary component. Just pass the component to the
 *  PrintUtilities.printComponent. The component you want to
 *  print doesn't need a print method and doesn't have to
 *  implement any interface or do anything special at all.
 *  <P>
 *  If you are going to be printing many times, it is marginally more
 *  efficient to first do the following:
 *  <PRE>
 *    PrintUtilities printHelper = new PrintUtilities(theComponent);
 *  </PRE>
 *  then later do printHelper.print(). But this is a very tiny
 *  difference, so in most cases just do the simpler
 *  PrintUtilities.printComponent(componentToBePrinted).
 *
 *  7/99 Marty Hall, http://www.apl.jhu.edu/~hall/java/
 *  May be freely used or adapted.
 */

public class PrintUtilities implements Printable {
  private Component componentToBePrinted;

  public static void printComponent(Component c) {
    new PrintUtilities(c).print();
  }

  public PrintUtilities(Component componentToBePrinted) {
    this.componentToBePrinted = componentToBePrinted;
  }

  public void print() {
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog())
      try {
        printJob.print();
      } catch(PrinterException pe) {
        System.out.println("Error printing: " + pe);
      }
  }

  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);
    }
  }

  /** The speed and quality of printing suffers dramatically if
   *  any of the containers have double buffering turned on.
   *  So this turns if off globally.
   *  @see enableDoubleBuffering
   */
  public static void disableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(false);
  }

  /** Re-enables double buffering globally. */

  public static void enableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(true);
  }
}
4

3 回答 3

3

我想我理解你的问题。您遇到的困难是因为 PrintUtilities 类没有公开用户是否决定打印或取消操作。如果您希望这样做，您需要进行一些修改：

public static Boolean printComponent(Component c) {
    return (new PrintUtilities(c)).print();
}

public Boolean print() {
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog()) { // i assume this is where the dialog is shown
        // user decided to print
        try {
            printJob.print();
        } catch(PrinterException pe) {
            System.out.println("Error printing: " + pe);
        }
        return true;
    }
    else {
        // user canceled
        return false;
    }
}

现在，当您调用 printComponent 时，它将返回它是否实际打印。

于 2012-10-06T00:39:21.170 回答
2

您需要附加一个ActionListner“打印”按钮

btnOkay.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent evt) {
      PrintUtilities pu = new PrintUtilities(componentToBePrinted);
      pu.print();
    }
}

您可能需要阅读如何编写动作侦听器以获取更多信息

于 2012-10-06T00:32:29.053 回答
0 
public void print() {
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog())
      try {
          System.out.println("code here");
        printJob.print();
      } catch(PrinterException pe) {
        System.out.println("Error printing: " + pe);
      }
  }

我找到了。抱歉发布这个。我不能删除这个问题，因为它说它有其他人的答案。我发现这是我可以编码的部分。

于 2012-10-06T01:05:09.770 回答