Home / Forums / How to handle text clipping and auto-scroll in custom Dear ImGui log consoles? [Discussion #4]

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How to handle text clipping and auto-scroll in custom Dear ImGui log consoles? [Discussion #4]

ImGuiAddict
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5y ago · Aug 22, 2021 9:51 AM
#1
I am building an in-game debug console in Dear ImGui. How can I implement smooth auto-scrolling to the bottom when new logs arrive, while allowing the user to scroll up without fighting the view?
ImGuiAddict · GUI Developer
Building debug consoles, inspector panels, and telemetry das...
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ConsoleKing
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4y ago · Aug 22, 2021 12:10 PM
#2
Check ImGui::GetScrollY() >= ImGui::GetScrollMaxY() before adding new items! If the user was already at the bottom, call ImGui::SetScrollHereY(1.0f) after rendering the new log entries. If the user scrolled up to inspect previous logs, skip the SetScrollHereY call so the view stays fixed.
ConsoleKing · Terminal & CLI Tools
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ShadowPwn
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4y ago · Aug 22, 2021 3:10 PM
#3
Also use ImGuiListClipper for large log lists (10,000+ items)! It only renders the visible lines on screen, preventing framerate drops.
ShadowPwn · Security & Anticheat Analysis