Question

到目前为止，我所拥有的是：

// tab是JTabbedPane

    for(int i = 0; i < tab.getTabCount(); i ++){
        if(tab.getComponent(i) instanceof DuctReport)
            PrintUtilities.printComponent(tab.getComponent(i), DuctReport.PRINT_SIZE);
        else if(tab.getComponent(i) instanceof Vandy)
            PrintUtilities.printComponent(tab.getComponent(i), Vandy.PRINT_SIZE);
        else
            PrintUtilities.printComponent(tab.getComponent(i), .8);
    }

//这是PrintUtilities的代码：

    public class PrintUtilities implements Printable{

    private Component componentToBePrinted;
    private double scale;

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

    public PrintUtilities(Component componentToBePrinted, double scale) {
        this.componentToBePrinted = componentToBePrinted;
        this.scale = scale;

    }

    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.scale(scale, scale);
            g2d.translate(pageFormat.getImageableX(),pageFormat.getImageableY());
            disableDoubleBuffering(componentToBePrinted);
            componentToBePrinted.paint(g2d);
            enableDoubleBuffering(componentToBePrinted);
            return(PAGE_EXISTS);
        }
    }

}

当我做我所拥有的，我必须单独点击“打印”每个要打印的组件，我可以做些什么来打印单个打印机工作中的所有组件？

我还需要将组件放在页面中心，我试着这样做：

g2d.translate((pageFormat.getImageableWidth()-componentToBePrinted.getWidth)/2,
              pageFormat.getImageableY());

但在某些情况下，组件的宽度大于可成像宽度，任何想法？

Answer 1

尝试将每个JPanel添加到另一个JPanel：

JPanel wrapper = new JPanel();

for(JPanel panel : yourPanels){
     wrapper.add(panel);
}

PrintUtilities.printComponent(wrapper, scale);

Answer 2

您可以发送Component con []作为打印作业的参数，然后相应地应用printutil递归

传递数组中的所有面板并更改print（）函数中的索引。

在单个PrinterJob中打印多个JPanel

2 个答案: