Item-tooltip for group will disappear for a short time if the widget inside is clicked

[achabense]

Version/Branch of Dear ImGui:

Version 1.90.9

Back-ends:

imgui_impl_sdl2.cpp + imgui_impl_sdlrenderer2.cpp

Compiler, OS:

Windows 10 + MSVC 2022

Full config/build information:

No response

Details:

If an item in a group is clicked, IsItemHovered for the group will become false for a short period of time. (This will happen even if there is only one widget in the group.)

Screenshots/Video:

Minimal, Complete and Verifiable Example code:

static void issue() {
    if (ImGui::Begin("Issue", 0, ImGuiWindowFlags_NoSavedSettings)) {
        ImGui::BeginGroup();
        ImGui::Button("Button1");
        ImGui::SameLine();
        ImGui::Button("Button2");
        ImGui::EndGroup();

        const bool hovered = ImGui::IsItemHovered();
        const bool tooltip_hovered = ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip);
        // `ImGuiHoveredFlags_DelayNormal` alone have no such issue, but will behave the same if added `ImGuiHoveredFlags_NoSharedDelay`.

        // The use case that the raised issue.
        const ImVec2 min = ImGui::GetItemRectMin();
        const ImVec2 max = ImGui::GetItemRectMax();
        ImGui::GetWindowDrawList()->AddRect(min, max, IM_COL32_WHITE);
        if (ImGui::BeginItemTooltip()) {
            ImGui::Text("These buttons ...");
            ImGui::EndTooltip();
        }

        // `Tooltip-hovered` will become 0 for a short period when the button is either clicked or
        // released-from)
        ImGui::Text("\n\n\nMouse:%d,Hovered:%d Tooltip-hovered:%d", int(ImGui::IsMouseDown(ImGuiMouseButton_Left)),
                    int(hovered), int(tooltip_hovered));
    }
    ImGui::End();
}

[ocornut]

Groups are unfortunately flawed in various ways, and one of the thing is they inherit the id of the active item inside them so the id can change. I should rework this eventually but probably not soon.