[scribus] images: fitting and filling the frame

[ale rimoldi]

hi

i've opened two tickets for improving the ways images fits in the frame.

- when an image is set to fit the frame, it should just fit it
  https://bugs.scribus.net/view.php?id=15448

- fill a frame with the image
  https://bugs.scribus.net/view.php?id=15560

i have written a short article to present the new features:

http://impagina.org/news/2019-03-04-fill-fit-images

i have a patch that is almost ready and, if you're comfortable with
github, it can be tested here:

https://github.com/aoloe/scribus/tree/image-fill-frame
(the branch contains both patches)

you can see the patch applied in this screencast:

https://my.mixtape.moe/aiujle.webm

- first i move the image inside a frame where the image fits
  - the image always "fits" the frame
  - you cannot rotate or zoom it
- then, in free scaling, i can freely move around or rotate the image
- in the new "fill frame" mode, i can only move the image in one
  direction, and i see the most of the image, given the constraint that
  it should have no "white bands".


there is little missing and i can submit a patch.

but there is one big question:

is it really needed to create a third mode?
or does anybody see a better way to allow the new feature?

i've been thinking about adding a checkbox in the "fit to frame"
section, but i could not get to a solution that is clearly better.

i'm eager to ear your feedback...

ciao
a.l.e