Home / Forums / How to handle text clipping and auto-scroll in custom Dear ImGui log consoles? [Discussion #3]

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How to handle text clipping and auto-scroll in custom Dear ImGui log consoles? [Discussion #3]

ImGuiArtist
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1y ago · Nov 13, 2024 2:42 PM
#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?
ImGuiArtist · Modern UI Designer
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GenericGuru
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1y ago · Nov 13, 2024 6:47 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.
GenericGuru · Templates & Generics
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BinaryParser
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1y ago · Nov 13, 2024 8:47 PM
#3
Also use ImGuiListClipper for large log lists (10,000+ items)! It only renders the visible lines on screen, preventing framerate drops.
BinaryParser · File Format Reverser
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