page size changes unexpectedly when running extension Render->Layout->Nup layout, if using mm as document unit.

[Alvin Penner]

- running Windows XP, Inkscape rev 14146, with mm as the default document unit
- load the Document Properties dialog and run Nup layout extension.
- in the Nup layout Page Dimensions tab, set units to mm and set size to 210x297 mm
- apply extension and check the Document Properties to note that the new page size is given as 210*297 px, not mm
- restart Inkscape with same document and rerun the Nup layout.
- choose a Nup layout page size of 816*1056px in order to produce a standard letter size page.
- check the Document Properties dialog to see that the new page size is actually 215.9*279.4 px, which is too small

- not reproduced if the startup document is default_px.svg which uses px as the document unit.

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Follow-up-report to:
Bug #1277649 “Extensions->Render->Layout->N-up layout fails”

[su_v (suv-lp)]

On 2015-05-11 23:58 (+0200), Alvin Penner wrote:> - running Windows XP, Inkscape rev 14146, with mm as the default document unit
> - load the Document Properties dialog and run Nup layout extension.
> - in the Nup layout Page Dimensions tab, set units to mm and set size to 210x297 mm
> - apply extension and check the Document Properties to note that the new page size is given as 210*297 px, not mm

Reproduced with Inkscape 0.91+devel r14146 on OS X 10.7.5.

> - restart Inkscape with same document and rerun the Nup layout.
> - choose a Nup layout page size of 816*1056px in order to produce a standard letter size page.
> - check the Document Properties dialog to see that the new page size is actually 215.9*279.4 px, which is too small

This part did not reproduce though.

[Alvin Penner (apenner)]

attached is a proposed modification of the file layout_nup.py which deals with this scaling issue

[su_v (suv-lp)]

... changes from comment #2 as diff against trunk r14147.

[Alvin Penner (apenner)]

fix committed to rev 14153

[su_v (suv-lp)]

Fix backported to 0.91.x in rev 13795.