On Fri, Jul 18, 2014 at 5:34 PM, Przemyslaw Golab wrote:

Hello :)

I would like to expose one very annoying work-flow problem with transform tools.

When you edit your region with transform tools the previous state of pixels is displayed at the same time with newly transformed ones. It often gets in a way of my transforms, it makes hard to evaluate if new transformation is correct because old one covers region that I would like to, for example, see exposed.

Yep, it's been discussed before. Someone just needs to sit down and actually fix it. I know you are not a programmer, so not asking you for a patch :)

Alex

El vie, 18-07-2014 a las 15:34 +0200, Przemyslaw Golab escribió:

Hello :)

I would like to expose one very annoying work-flow problem with transform tools.

When you edit your region with transform tools the previous state of pixels is displayed at the same time with newly transformed ones. It often gets in a way of my transforms, it makes hard to evaluate if new transformation is correct because old one covers region that I would like to, for example, see exposed.

I feel you...
As Alexandre said, it was discussed before. I even raised again the issue a couple of days ago on the IRC channel because at some point the ability to turn off the layer visibility while using the transform tool was lost (It's back).
This has been one of my pet-peeves with GIMP when using the transform tools since I started using it, and although sometimes it comes handy to have a reference of the original layer when transforming, most of the times it gets in the middle, covering the references you need to perform the transform in context (due to the nature of bitmap editing, it's more common to import large layers and scale them down than importing small layers and scale them up, so the large layer covering the composite is a really common scenario when editing).

When I raised this issue on the IRC channel the last time, pippin told me that in a future all the preview hacks of transform tools eventually will go away.
That's great, but meanwhile it would be nice if the current hacks are tweaked a little to avoid this annoying problem. I'm not asking for a full-fledged solution, just turning off the visibility of the layer when the transform overlay is drawn and turning it back on when the transform is commited would suffice.

Gez.

El sáb, 19-07-2014 a las 00:47 -0300, Gez escribió:

I even raised again the issue a couple of days ago on the IRC channel because at some point the ability to turn off the layer visibility while using the transform tool was lost (It's back).

...It's not back.
I just noticed that if the layer visibility is turned off after invoking the transform tool, the transformation can't be commited (applying the transform results in the unmodified layer). I'm not sure why this has changed, but it's a step backwards. Now the workaround of turning off the layer visibility can only be used if the layer is turned on again before commiting the transform, otherwise nothing happens.
And visibility of the layer can only be turned off after the transform tool is invoked, if the layer is not visible the transform tool does nothing (this is a reasonable behavior, a layer with the visibility turned off shouldn't be affected).

I'm not saying that the new behavior doesn't make sense in the big picture, but until there's a method for temporarily hiding the original layer when it's transformed the changes introduced prevent users from using the only possible workaround when the original gets in the middle.

Gez.