Function CalcNextScrollFromScrollTargetAndClamp

tutorials/common/imgui/imgui.cpp:9452–9489

}

static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window)
{
    ImVec2 scroll = window->Scroll;
    if (window->ScrollTarget.x < FLT_MAX)
    {
        float decoration_total_width = window->ScrollbarSizes.x;
        float center_x_ratio = window->ScrollTargetCenterRatio.x;
        float scroll_target_x = window->ScrollTarget.x;
        if (window->ScrollTargetEdgeSnapDist.x > 0.0f)
        {
            float snap_x_min = 0.0f;
            float snap_x_max = window->ScrollMax.x + window->SizeFull.x - decoration_total_width;
            scroll_target_x = CalcScrollEdgeSnap(scroll_target_x, snap_x_min, snap_x_max, window->ScrollTargetEdgeSnapDist.x, center_x_ratio);
        }
        scroll.x = scroll_target_x - center_x_ratio * (window->SizeFull.x - decoration_total_width);
    }
    if (window->ScrollTarget.y < FLT_MAX)
    {
        float decoration_total_height = window->TitleBarHeight() + window->MenuBarHeight() + window->ScrollbarSizes.y;
        float center_y_ratio = window->ScrollTargetCenterRatio.y;
        float scroll_target_y = window->ScrollTarget.y;
        if (window->ScrollTargetEdgeSnapDist.y > 0.0f)
        {
            float snap_y_min = 0.0f;
            float snap_y_max = window->ScrollMax.y + window->SizeFull.y - decoration_total_height;
            scroll_target_y = CalcScrollEdgeSnap(scroll_target_y, snap_y_min, snap_y_max, window->ScrollTargetEdgeSnapDist.y, center_y_ratio);
        }
        scroll.y = scroll_target_y - center_y_ratio * (window->SizeFull.y - decoration_total_height);
    }
    scroll.x = IM_FLOOR(ImMax(scroll.x, 0.0f));
    scroll.y = IM_FLOOR(ImMax(scroll.y, 0.0f));
    if (!window->Collapsed && !window->SkipItems)
    {
        scroll.x = ImMin(scroll.x, window->ScrollMax.x);
        scroll.y = ImMin(scroll.y, window->ScrollMax.y);
    }
    return scroll;
}

void ImGui::ScrollToItem(ImGuiScrollFlags flags)
{