itextpdf：矩形修改宽度 [英] itextpdf : rectangle modify width

问题描述

是否可以修改现有矩形的宽度？

Is it possible to modify width of existing rectangle ?

我有：

@Override
public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text){
Rectangle rectangle = new Rectangle(rect);
//something like that :
rectangle.setWidth(400f);
}

推荐答案

你可以（而且应该）不要使用名为 setWidth（）的方法。无论这种方法做什么都会非常模糊。

You can (and should) not use a method called setWidth(). Whatever that method would do would be very ambiguous.

假设你有一个左下角的矩形 x 坐标等于36，右上角 x 坐标等于559.（我没有随机选择这些数字：这些是默认A4页面内的默认边距使用iText。）现在当你改变这样一个矩形的宽度时：你的意思是将矩形向左，向右，或两者都延伸？我希望这个例子表明，使用 setWidth（）方法是没有意义的。

Suppose that you would have a rectangle with lower-left x coordinate equal to 36 and with upper-right x coordinate equal to 559. (I didn't choose these numbers at random: those are the default margins inside the default A4 page when using iText.) Now when you change the width of such a rectangle: do you mean to extend the rectangle to the left, to the right, or both? I hope this example shows that having a setWidth() method doesn't make sense.

相反，你应该更改 x setLeft（）或 setRight（） c>矩形的左坐标或右坐标的值，您自动更改宽度，并且不会混淆您更改宽度的方向。

Instead, you should use setLeft() or setRight() when you change the x value of the left or right coordinate of the rectangle, you automatically change the width and there can be no confusion about the direction in which you're changing the width.

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