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Invisible Scrollbar / Scrollbar visibility? #9548
Description
Version/Branch of Dear ImGui:
Version 1.92.2, Branch: docking
Back-ends:
imgui_impl_win32.cpp + imgui_impl_dx11.cpp
Compiler, OS:
Windows11 MSVC 2022
Full config/build information:
Is it possible to replicate the scrolling behavior shown in the attached video?
Specifically, where the scrollbar only appears when the mouse hovers over its area, and it does not occupy its own dedicated space but instead overlays the content of the last column.
2026-09-18.11-52-00.mp4
Details:
My Issue/Question:
XXX (please provide as much context as possible)
Screenshots/Video:
No response
Minimal, Complete and Verifiable Example code:
// Here's some code anyone can copy and paste to reproduce your issue
ImGui::Begin("Example Bug");
MoreCodeToExplainMyIssue();
ImGui::End();
Activity
[-]Table scroll[/-][+]Scrollbar visibility[/+][-]Scrollbar visibility[/-][+]Invisible Scrollbar / Scrollbar visibility?[/+]ocornut commentedon Sep 18, 2026
No, this is not supported.
My issue with implementing it is the following:
It does indeed prevent a whole category of problems (feedback loop between contents sizes and scrollbar visibility, e.g. #8488, #3285).
If it is exposed as a Style option, it raises the issue that we'd have a Style option can hide a whole category of problems, and then code written somewhere might break elsewhere if the style is different because it wasn't checked for feedback loop issues. That doesn't seem desirable for a healthy code sharing ecosystem.
So my gut feeling is that the only possible move would be to enforce a scheme everywhere where scrollbar visibility does not alter layout, which could be a choice between invisible and appearing over contents (as in your video), invisible and appearing next to contents (would work if thin enough). That's not a change I would make casually. Especially considering that technical profile/users tend to dislike non-visible scrollbars.
tope99 commentedon Sep 20, 2026
There is a way how to achieve something similar. Set scrollbar size to zero:
ImGui::PushStyleVar(ImGuiStyleVar_ScrollbarSize, 0). Then upon mouse dragging resetwindow->ScrollbarSizeand draw it again usingImGui::Scrollbar. ImRAD generates the required code whenscrollWhenDraggingtable property is set.