[Libreoffice-bugs] [Bug 115464] UI of export to PNG and JPG misleading for resolution

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=115464

--- Comment #12 from Tomaz Vajngerl <quikee at gmail.com> ---
First of - change the "number of pixels" (as you self admitted it is
meaningless to the users) to pixel width and height as other programs do and
users are used to. Number of pixels "clever" as number of pixels is, it is not
what users have a feeling for (as you self admitted).

Locking seems superfluous to me. We just need to decide the order in the
meaningful way. I would do it like this:
- change pixel width or height changes logical width and height
- change logical width or height changes pixel width and height
- change of resolution changes pixel width and height

This should work well for those people who want to just define the pixel
dimensions and for those who wants to define a logical dimension and the
resolution factor. 

I must again emphasize that pixel width and height is the only absolute
parameter that defines the bitmap, logical dimensions or resolution is written
to the bitmap as metadata (usually the resolution only) and will or will not be
taken account when the bitmap is later used.

The problem with current dialog is that you have the possibility to set either
the pixel dimensions or one of logical dimensions and separately the
resolution. The misunderstanding for users occurred when because the change of
resolution changed the logical dimension and change of logical dimensions
changed the resolution. One problem was that this was not visible and the
second problem was that this did not change the pixel dimensions, so users
thought the change did not have any effect. Order I propose doesn't create this
situations - locking can still do this.

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