是否可以在FXML中使用算术表达式？ [英] Is it possible to use arithmetic expression in FXML?

问题描述

我希望有一个功能可以让我在FXML中使用数字。例如，尝试将一个元素的高度定义为等于常量，将第二个元素的高度定义为等于相同的常量* 2。是否有可能在FXML中完成它或者我是否需要在控制器中进行这部分视图构建（我想避免）？

I hoped for a feature that would allow me to work with numbers inside the FXML. For example, tried to define the height of one element to be equal to a constant and the height of the second element to be equal to the same constant*2. Is it possible to do it in FXML at all or do I need to do this part of view build-up inside the controler (which I would like to avoid)?

推荐答案

是的，有可能：

<?import java.lang.Double?>

...

<fx:define>
    <Double fx:id="xHeight" fx:value="100" />
</fx:define>

...

<Label fx:id="lblElementOne" prefHeight="$xHeight" />
<Label fx:id="lblElementTwo" prefHeight="${xHeight * 2}" />

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