打印时设置LANDSCAPE方向 [英] Setting LANDSCAPE orientation when printing

问题描述

我需要打印图像.当我设置方向

I need to print an image. When I set orientation like

printRequestAttributeSet.add(OrientationRequested.LANDSCAPE);

一切正常.

但是当我在Printable的print()方法内设置方向时:

But when I set orientation inside print() method of Printable:

public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
            if (pageIndex >= images.size()) 
                return Printable.NO_SUCH_PAGE;

            image = images.get(pageIndex);
            // if image width>height --> Landscape, else --> Protrait
            if (image.getWidth(null) > image.getHeight(null)) 
                pageFormat.setOrientation(PageFormat.LANDSCAPE);
            else 
                pageFormat.setOrientation(PageFormat.PORTRAIT);

            graphics2D = (Graphics2D) graphics;
            graphics.drawImage(image, 0, 0, image.getWidth(null), image.getHeight(null),   null);

            return PAGE_EXISTS;
};

不适用于首页.即以横向"模式打印除第一页以外的所有页面.

推荐答案

已经尝试打印页面时，无法更改方向.

You can not change the orientation when your already trying to print the page.

如果需要提供许多方向不同的页面，则需要查看可分页接口，请参见以Java打印(例如).

If you need to provide a number of pages with different orientations, you will want to look at the Book and Pageable interfaces, see Printing in Java for examples.

您唯一需要解决的另一种方法是在Printable中旋转图像，这充其量是很麻烦的.

The only other solution you have is to rotate the image in Printable, which is troublesome at best.

ps-当工作时，打印很有趣；)

ps - Printing is fun...when it works ;)

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