[reportlab-users] StringIO() in a SimpleDocTemplate

[Kammah, Nassim]

Hi, 

 

I am really new to reportLab and having some trouble inserting images (
in StringIO buffers) into a SimpleDocTemplate. 

The code I am trying to use looks like : 

 

For the image generation : 

 

Def figure_to_string(fig):

    canvas = FigureCanvasAgg(fig)

    canvas.draw()

    imageSize = canvas.get_width_height()

    imageRgb = canvas.tostring_rgb()

    pilImage = PIL.Image.fromstring("RGB", imageSize, imageRgb)

    buffer = StringIO()

    pilImage.save(buffer, "PNG")

    return buffer.getvalue()

 

For the report part : 

 

doc=SimpleDocTemplate('doctemplate.pdf')

objects_to_draw = []

para = Paragraph("<b>My image</b>", normal)

objects_to_draw.append(para)

 

img= platypus.Image(figure_to_string(fig))

objects_to_draw.append(img)

 

 

But as you may guess, it is not working ...my guess is that my image as
a string is not a flowable. I read the chapter 9 on writing its own
flowable ( and the example of the hand) : is it the way to go, or is
there any other solution or something I missed?

 

Regards,

 

Nassim

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