Prevent scrolling when Item is hovered

[pixtur]

Version/Branch of Dear ImGui:

Version: 1.86
Branch: master

Back-end/Renderer/Compiler/OS

Back-ends: imgui.net
Operating System: win10

My Issue/Question:

I want to implement an edit interaction that increments/decrements numeric values when the mouse wheel is used while hovering these values. The basic concept is easy enough to implemented, but I didn't find a nice solution to combine it with scrolling: I want to prevent scrolling ONLY if an numeric field is hovered. Is something like this possible?

One work around would be a global "number value hovered" flag that is used to prevent scrolling. But this might cause frame delay issues.

Screenshots/Video

mouse-wheel-interaction.mp4

[pixtur]

Update: I couldn't detect any side effects of the hover-flag method. So this solution is good enough for me.

[ocornut]

You can be using SetItemUsingMouseWheel() however you want, see #2891, #4303, #4207
Note we are redesigning this currently, in the future this will be generalized and you'll be able to use e.g. SetItemInputOwner(ImGuiKey_MouseWheelY); or SetInputOwner(ImGuiKey_MouseWheelY, id).

[pixtur]

Awesome thank you!

[ocornut]

Update: I have now pushed a more generic system for input ownership, and as I result obsoleted SetItemUsingMouseWheel(). There is still a redirection function but I expect to delete it sooner than the typical 2-3 years obsolescence schedule.

You can now use:

SetItemKeyOwner(ImGuiKey_MouseWheelY);

Note that SetItemUsingMouseWheel() used to lock both wheel axises.
If you need both you can call the function with ImGuiKey_MouseWheelX and ImGuiKey_MouseWheelY.

Also note that using SetKeyOwner() and SetItemKeyOwner() flags allow for variety of other behaviors outside the scope of this thread.

(cross posted to #2704, #2891, #5108)