JavaFX 在多个页面上打印表格 View

Question

所以，我的问题是我需要打印 tableview 的内容，但其中有太多项目，它只打印其中的前 23 个。我已经在这里找到了一些解决方案，不幸的是它们没有多大帮助。

这是我的打印方法:

@FXML
private void printIt() {
    Printer printer = Printer.getDefaultPrinter();
    PageLayout pageLayout = printer.createPageLayout(Paper.A4, PageOrientation.LANDSCAPE, Printer.MarginType.DEFAULT);
    double scaleX = pageLayout.getPrintableWidth() / logBookTable.getBoundsInParent().getWidth();
    double scaleY = pageLayout.getPrintableHeight() / logBookTable.getBoundsInParent().getHeight();
    logBookTable.getTransforms().add(new Scale(scaleX, scaleY));

    PrinterJob job = PrinterJob.createPrinterJob();
    if (job != null) {
        boolean successPrintDialog = job.showPrintDialog(dialogStage);
        if(successPrintDialog){
            boolean success = job.printPage(pageLayout,logBookTable);
            if (success) {
                job.endJob();
            }
        }
    }
}

Answer 1

我浏览了很多帖子才找到答案。关键是扩展 tableview 的高度以显示而不需要在屏幕右侧滚动。 (有一些方法可以在不扭曲程序布局的情况下执行此操作。我没有在这个问题中解决这部分问题。关于如何完成此任务有很好的答案。)一旦您将表格 View 的高度扩展到显示所有它是不需要滚动条的行。然后一次打印一页，从零高度开始，到负高度一页。(在本例中:向下接近 11 英寸。边框在其中发挥作用。)下一页应该从上一页的位置开始页面结束并打印到几乎 11 英寸。 (从大约 -11 英寸到大约 -22 英寸。)这种模式一直持续到桌面 View 的整个高度都被遍历为止。

    Printer printer = Printer.getDefaultPrinter(); //get the default printer
    javafx.print.PageLayout pageLayout = printer.createPageLayout(Paper.NA_LETTER, PageOrientation.PORTRAIT, Printer.MarginType.DEFAULT); //create a pagelayout.  I used Paper.NA_LETTER for a standard 8.5 x 11 in page.
    PrinterJob job = PrinterJob.createPrinterJob();//create a printer job

    if(job.showPrintDialog(taMain.getScene().getWindow()))// this is very useful it allows you to save the file as a pdf instead using all of your printer's paper. A dialog box pops up, allowing you to change the "name" option from your default printer to Adobe pdf. 
    {
        double pagePrintableWidth = pageLayout.getPrintableWidth(); //this should be 8.5 inches for this page layout.
        double pagePrintableHeight = pageLayout.getPrintableHeight();// this should be 11 inches for this page layout.


        tblvMain.prefHeightProperty().bind(Bindings.size(tblvMain.getItems()).multiply(35));// If your cells' rows are variable size you add the .multiply and play with the input value until your output is close to what you want. If your cells' rows are the same height, I think you can use .multiply(1). This changes the height of your tableView to show all rows in the table.
        tblvMain.minHeightProperty().bind(tblvMain.prefHeightProperty());//You can probably play with this to see if it's really needed.  Comment it out to find out.
        tblvMain.maxHeightProperty().bind(tblvMain.prefHeightProperty());//You can probably play with this to see if it' really needed.  Comment it out to find out.

        double scaleX = pagePrintableWidth / tblvMain.getBoundsInParent().getWidth();//scaling down so that the printing width fits within the paper's width bound.
        double scaleY = scaleX; //scaling the height using the same scale as the width. This allows the writing and the images to maintain their scale, or not look skewed.
        double localScale = scaleX; //not really needed since everything is scaled down at the same ratio. scaleX is used thoughout the program to scale the print out.

        double numberOfPages = Math.ceil((tblvMain.getPrefHeight() * localScale) / pagePrintableHeight);//used to figure out the number of pages that will be printed.



        //System.out.println("pref Height: " + tblvMain.getPrefHeight());
        //System.out.println("number of pages: " + numberOfPages);


        tblvMain.getTransforms().add(new Scale(scaleX, (scaleY)));//scales the printing. Allowing the width to say within the papers width, and scales the height to do away with skewed letters and images.
        tblvMain.getTransforms().add(new Translate(0, 0));// starts the first print at the top left corner of the image that needs to be printed

        //Since the height of what needs to be printed is longer than the paper's heights we use gridTransfrom to only select the part to be printed for a given page.
        Translate gridTransform = new Translate();
        tblvMain.getTransforms().add(gridTransform);

        //now we loop though the image that needs to be printed and we only print a subimage of the full image.
        //for example: In the first loop we only pint the printable image from the top down to the height of a standard piece of paper. Then we print starting from were the last printed page ended down to the height of the next page. This happens until all of the pages are printed. 
        // first page prints from 0 height to -11 inches height, Second page prints from -11 inches height to -22 inches height, etc. 
        for(int i = 0; i < numberOfPages; i++)
        {
            gridTransform.setY(-i * (pagePrintableHeight / localScale));
            job.printPage(pageLayout, tblvMain);
        }

        job.endJob();//finally end the printing job.