https://bugs.kde.org/show_bug.cgi?id=506918
Bug ID: 506918
Summary: Emphasize edited channels in "Channel" selector for
Levels, Color Adjustment Curves, and Cross-Channel
Color Adjustment filters
Classification: Applications
Product: krita
Version First 5.2.9
Reported In:
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Usability
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
The levels, color adjustment curves, and cross-channel color adjustment filters
let you choose a "channel" to adjust using a button that displays a dropdown
list for you to select the channel.
Normally, when you have a button like this, it means you have CHOSEN a specific
channel (see the Halftone filter, for example). However, for these filters,
this selector acts like a tab button. If you make changes to the Red channel
and switch to the Green channel, you haven't changed your choice of which
channel to affect, you have simply changed which channel you are currently
viewing the curves of to edit. The curves for the Red channel stay in effect.
They weren't reset. You simply can't see them anymore.
FIRST USABILITY ISSUE
You can't tell which channels HAVE been edited and which channels are in their
default setting.
This could be solved by simply adding an asterisk (*) next to the channel name
in the dropdown when it has been modified.
SECOND USABILITY ISSUE
On filter layers and filter masks, the filter always defaults to the first
choice even when a different channel has been edited.
For example, if you make a Levels filter that operates on the Alpha channel and
try to edit it, the dialog should display the RGBA channel that hasn't been
modified instead of the Alpha channel, which is a confusing experience.
THIRD USABILITY ISSUE
You can't tell at first glance which channels have been modified and which have
not. Even if an asterisk (*) were added, you need to open the dropdown to see
this.
To remedy this would be a bit more complicated, as the dropdown would have to
be replaced with tabs or with a list in a side pane (like the styles in the
layer styles dialog). I think this would be the ideal, but I'm not sure if it
would actually look good in practice since I've never seen a software do this.
A simpler alternative solution would be to display a text label that reads "2
channels active" or simply "(2)" next to the channel selector to indicate how
many channels are currently active.
ADDITIONAL INFORMATION
On GIMP 3, although the dropdown is fancier with icons, there is no indication
of which channels have been edited. Photopea doesn't have them either. Both
software use the dropdown button instead of tabs, however, just like Krita does
currently.
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