XnView Software

XnViewMP 1.4.5 64bit
Windows11 (22H2), display resolution 3840x2160, win scaling 150%

Batch convert
Input allows duplicates, it is either a feature or a bug, I'm not sure
Bug
If bug, then just silently filter out duplicates each time user adds them
Feature
It can be a feature because output filename support # and each file will have it's own index, cannot figure out sane usecase though.
Without # they will be overwritten, with coresponing popup dialog that may confuse user.

Suggestion A
Add checkbox 'allow duplicates' (ticked off by default) somewhere below Add buttons.


Suggestion B
normalize use of modifier keys, COPY should not be default action:

• current behaviour
  - no mod - copy
  - CTRL - copy
  - SHIFT - copy
  - ALT - copy

• suggested behaviour
  - no mod - disabled, no action
  - CTRL - copy
  - SHIFT - disabled, no action
  - ALT - disabled, no action

Related

• suggestions
  Batch convert - actions - remember expanded/collapsed state
  Batch convert - actions - reinforce consistency of ranges ui
  Batch convert - input - Hot folders manager - minor improvements
  Batch convert - output - improve information readability
  Batch convert - ui - remove tabs
  - postponed -
  Batch convert - input - normalize use of modifier keys (current post)
  - done -
  Batch convert - move controls between Output and Settings

It's not a bug but a feature

Not sure I can figure out the use case for this feature tbh.
Since you convert all files in batch, you cannot, for example, assign different effects to different images, its always same effects to the same amount of images.

What is the profit of having in the end the same image, but with different names: img_result_1, img_result_2, etc (if you choose not to replace duplicates during convertion)?

But anyway, there are thing related to this functionality that can be improved - normalize use of modifier keys, added into top post as Suggestion B.

ok, i disable it. See issue for current status and some details.

This problem is supposed to be fixed in XnView MP 1.5.0 beta. Please check and confirm the bug fix here.

1.5.0b1
1. modifier keys disabled in file list area, but you still can drag&drop file(s) from file list (with or without modifiers) to dialog space (controls/tabs/etc) and they will be duplicated
2. its still posible to drag&drop (from win file explorer) or add (via add files/folder) same file(s) multiple times

user0 wrote: Sat Jun 17, 2023 1:07 pm 1. modifier keys disabled in file list area, but you still can drag&drop file(s) from file list (with or without modifiers) to dialog space (controls/tabs/etc) and they will be duplicated

I can't reproduce

2. its still posible to drag&drop (from win file explorer) or add (via add files/folder) same file(s) multiple times

Yes, it's a behavior...

xnview wrote: Mon Jun 19, 2023 6:51 am

user0 wrote: Sat Jun 17, 2023 1:07 pm 1. modifier keys disabled in file list area, but you still can drag&drop file(s) from file list (with or without modifiers) to dialog space (controls/tabs/etc) and they will be duplicated

I can't reproduce

drag&drop image(s) to the yellow area - it will be duplicated in file list area (imho thats a bug)

Ok, i understand now. I can't detect if the source files come from file list or from windows explorer when dragging on the dialog. The only way is to disable drag&drop in the dialog.

xnview wrote: Mon Jun 19, 2023 7:48 am Ok, i understand now. I can't detect if the source files come from file list or from windows explorer when dragging on the dialog. The only way is to disable drag&drop in the dialog.

ok, disabling drag&drop is not an option.

xnview wrote: Mon Jun 19, 2023 6:51 am

2. its still posible to drag&drop (from win file explorer) or add (via add files/folder) same file(s) multiple times

Yes, it's a behavior...

imho this is useless for Batch convert because duplicates will be overwritten by default,
but even if you add # - content of result files will be the same, only with new name (no idea why anyone would need that).

However, it may be useful (for someone) in Slideshow, Join Images, Multipage file tools
so what about Suggestion A?