Method NavCalcPreferredRefPos

tutorials/common/imgui/imgui.cpp:10798–10824

}

static ImVec2 ImGui::NavCalcPreferredRefPos()
{
    ImGuiContext& g = *GImGui;
    ImGuiWindow* window = g.NavWindow;
    if (g.NavDisableHighlight || !g.NavDisableMouseHover || !window)
    {
        // Mouse (we need a fallback in case the mouse becomes invalid after being used)
        // The +1.0f offset when stored by OpenPopupEx() allows reopening this or another popup (same or another mouse button) while not moving the mouse, it is pretty standard.
        // In theory we could move that +1.0f offset in OpenPopupEx()
        ImVec2 p = IsMousePosValid(&g.IO.MousePos) ? g.IO.MousePos : g.MouseLastValidPos;
        return ImVec2(p.x + 1.0f, p.y);
    }
    else
    {
        // When navigation is active and mouse is disabled, pick a position around the bottom left of the currently navigated item
        // Take account of upcoming scrolling (maybe set mouse pos should be done in EndFrame?)
        ImRect rect_rel = WindowRectRelToAbs(window, window->NavRectRel[g.NavLayer]);
        if (window->LastFrameActive != g.FrameCount && (window->ScrollTarget.x != FLT_MAX || window->ScrollTarget.y != FLT_MAX))
        {
            ImVec2 next_scroll = CalcNextScrollFromScrollTargetAndClamp(window);
            rect_rel.Translate(window->Scroll - next_scroll);
        }
        ImVec2 pos = ImVec2(rect_rel.Min.x + ImMin(g.Style.FramePadding.x * 4, rect_rel.GetWidth()), rect_rel.Max.y - ImMin(g.Style.FramePadding.y, rect_rel.GetHeight()));
        ImGuiViewport* viewport = GetMainViewport();
        return ImFloor(ImClamp(pos, viewport->Pos, viewport->Pos + viewport->Size)); // ImFloor() is important because non-integer mouse position application in backend might be lossy and result in undesirable non-zero delta.
    }
}

float ImGui::GetNavTweakPressedAmount(ImGuiAxis axis)
{