Impossible to target a chosen page on a multipage Inkscape document

[duangdoock]

In Inkscape when multipages are created it's impossible to target the script to the desired page. It is always rendered on the first page only. So how would it be possible to target the script on page 2 only for example? Thanks

[spakin]

Because SVG doesn't actually support pages, Inkscape implements them as coordinates that lie outside of the viewbox. Simple Inkscape Scripting enables scripts to query a page's coordinates by invoking the bounding_box method on the page object, as in the following example:

# Create a few pages.
npages = 3
pages = [page(i + 1) for i in range(npages)]

# Draw a large circle in the center of each page.
rad = min(pages[0].width, pages[0].height)*3/8
for pg in pages:
    bbox = pg.bounding_box()
    circle(bbox.center, rad, stroke=2, fill=randcolor())

Hence, to target a script to a particular page, you'll need to acquire the page's bounding box as in the preceding example and limit the script's operations only to objects that lie within that bounding box.

See Page creation in the Simple Inkscape Scripting wiki for more information.

[duangdoock]

Thanks very much for taking the time to reply.
In fact I would like to automatically insert images in an Inkscape file which already has multipages.

Exemple, on page 1:
Image1.png at position x=200px y=200px
Image2.png at position x=400px y=400px

On page 2:
Image3.png at position x=200px y=200px
Image4.png at position x=400px y=400px

Do you think that a script could do it?
Thanks in advance for your help.

[spakin]

Yes. You can acquire the bounding box for each page then add each bounding box's left coordinate to x and top coordinate to y:

bboxes = [pg.bounding_box() for pg in all_pages()]
image('Image1.png', (bboxes[0].left + 200, bboxes[0].top + 200))
image('Image2.png', (bboxes[0].left + 400, bboxes[0].top + 400))
image('Image3.png', (bboxes[1].left + 200, bboxes[1].top + 200))
image('Image4.png', (bboxes[1].left + 400, bboxes[1].top + 400))

Alternatively, you might want to use an inkex.transforms.ImmutableVector2d to make the code easier to read:

bboxes = [pg.bounding_box() for pg in all_pages()]
origins = [inkex.transforms.ImmutableVector2d(bb.left, bb.top) for bb in bboxes]
image('Image1.png', origins[0] + (200, 200))
image('Image2.png', origins[0] + (400, 400))
image('Image3.png', origins[1] + (200, 200))
image('Image4.png', origins[1] + (400, 400))

[duangdoock]

Excellent Spakin you solved exactly my problem. It's working great! Thanks for the effort you're putting in this useful extension.
All the best!

[duangdoock]

If I may, how can I add a "rotation argument" to each pictures following the 2 options you suggested?

[spakin]

Invoke the rotate method on the object returned by image: image(…).rotate(…). For example

image('Image1.png', origins[0] + (200, 200)).rotate(45)

See Applying individual transformations in the Simple Inkscape Scripting wiki for more information about rotate and similar transformations.

[duangdoock]

Thanks so much!