ocornut
commented
3 years ago This seems to be triggered when the slider gets focused by Dear ImGui's Nav system (when pressing the alt key as part of the alt+tab key combo), and only happens if the tooltip has it's own platform window.
Good catch. I was about to say that mouse coordinates should be disabled and therefore tooltip off, but at the moment when keyboard navigation is active, IsItemHovered() will return true, and tooltip windows are marked as "Top most".
I am not exactly sure what the correct fix for that is.
- Ideally we'd have better control over window order in the OS (but it's a wider problem). Perhaps our handling for top most windows in the Win32 backend should instead be reworked as "on top of your main host window" (which itself it a concept we are trying to eradicate).
- It may make sense that the keyboard/gamepad navigation path of
IsItemHovered()also check whether the host window is focused. That would at least fix this particular (but likely most-common) manifestation of the issue.
Version/Branch of Dear ImGui:
Version: 1.83 WIP Branch: docking
Back-end/Renderer/Compiler/OS
Back-ends: imgui_impl_win32.cpp + imgui_impl_dx11.cpp Compiler: MSVC (Visual Studio 2019) Operating System: Windows 10
My Issue/Question:
Under specific circumstances, the tooltip of an interactable item will stay visible when switching to another platform window using Alt+Tab. That tooltip then stays visible until the main application is focused again. Note: This probably happens for every Win32 back-end, but I only tried directX 11
Screenshots/Video (This screenshot shows a snipped of Visual Studio, where the tooltip of a slider from the demo app stays on top of visual studio)
Standalone, minimal, complete and verifiable example: Open the example_win32_directx11 app (does not require any code modifications). Navigate to Widges > Vertical Sliders. Resize the window such that the tooltip of one of these sliders extends to outside of the main application window. Interact with that slider, then use Alt+Tab to switch focus between windows. After repeating the Alt+Tab combo a few times, the tooltip of that slider will stay visible even though the main application window is not focused anymore, and will then stay visible and on top of other windows until the main application gets focused again.
This seems to be triggered when the slider gets focused by Dear ImGui's Nav system (when pressing the alt key as part of the alt+tab key combo), and only happens if the tooltip has it's own platform window.