报告实验室图片链接 [英] ReportLab Image Link

问题描述

有没有办法在 ReportLab 中添加一个链接到鸭嘴兽图像对象?我知道如何在段落中的文本上添加链接，但我似乎找不到任何有关为图像添加链接的信息.

Is there a way to add an href/link to a Platypus Image object in ReportLab? I know how to add a link on text in a Paragraph but I can't seem to find anything about adding a link for an Image.

推荐答案

这可以通过 HyperlinkedImage 类 由missmely 提出:

This can be easily achieved with the HyperlinkedImage class proposed by missmely:

from reportlab.platypus import Image

class HyperlinkedImage(Image, object):

    # The only variable I added to __init__() is hyperlink. I default it to None for the if statement I use later.
    def __init__(self, filename, hyperlink=None, width=None, height=None, kind='direct', mask='auto', lazy=1):
        super(HyperlinkedImage, self).__init__(filename, width, height, kind, mask, lazy)
        self.hyperlink = hyperlink

    def drawOn(self, canvas, x, y, _sW=0):
        if self.hyperlink: # If a hyperlink is given, create a canvas.linkURL()
            x1 = self.hAlignAdjust(x, _sW) # This is basically adjusting the x coordinate according to the alignment given to the flowable (RIGHT, LEFT, CENTER)
            y1 = y
            x2 = x1 + self._width
            y2 = y1 + self._height
            canvas.linkURL(url=self.hyperlink, rect=(x1, y1, x2, y2), thickness=0, relative=1)
        super(HyperlinkedImage, self).drawOn(canvas, x, y, _sW)

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