将Printer PageLayout边距设置为零 [英] Set Printer PageLayout margin to zero

问题描述

我创建了一个允许用户打印节点的小型Javafx应用程序。我希望保证金为零。我在下面使用了以下代码，但它没有用。

I created a small Javafx application that allows the user to print a node. I want the margin to be zero. I used the following code below, but it didn't work.

printer = javafx.print.Printer.getDefaultPrinter();
pageLayout = printer.createPageLayout(Paper.JAPANESE_POSTCARD,  PageOrientation.PORTRAIT, 0.0f, 0.0f, 0.0f, 0.0f);

根据文档， createPageLayout 是边距（左，右，上，下）。我进行了打印测试，但打印文档中仍然有 0.5英寸边距。

According to the documentation, the last four parameters in createPageLayout is the margins(Left,Right,Top,Bottom). I made a print-test but there still a 0.5 inch margin in the printed document.

发生了什么事？任何想法？

What's going on? Any Idea?

推荐答案

您正面临硬件限制问题即可以应用于Paper的边距取决于硬件/打印机，而不仅仅是用于访问它的 API 。在这种情况下，尽管JavaFX允许您将保证金值传递为 0 ，但稍后会重新分配它们以支持打印机的最小值。

You are facing a hardware limitation issue i.e. the margin that can be applied to a Paper depends on the hardware / printer and not just the API used to access it. In this case, though JavaFX allows you to pass margin values as 0, but they are later re-assigned to support the printers minimum values.

来自 Javadocs ：

一个客户端需要知道哪些保证金值合法应该首先使用HARDWARE_MINIMUM边距获得PageLayout。

A client that needs to know what margin values are legal should first obtain a PageLayout using the HARDWARE_MINIMUM margins.

如果打印机不能支持指定的布局，它会将返回的布局调整为支持的配置

If the printer cannot support the layout as specified, it will adjust the returned layout to a supported configuration

您可以使用 Printer.MarginType.HARDWARE_MINIMUM 创建布局时，检查允许的最低保证金。

You can use Printer.MarginType.HARDWARE_MINIMUM while creating a layout, to check the minimum margin allowed.

pageLayout = printer.createPageLayout(Paper.JAPANESE_POSTCARD,  
             PageOrientation.PORTRAIT, Printer.MarginType.HARDWARE_MINIMUM);

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