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Widget stays on screen after deleting it via SetParent (NULL) in 3D UI


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This works in 2D UI but in 3D widget became not interactive but visible.

Maybe where is another way to delete widgets in 3D UI?

#include "UltraEngine.h"

using namespace UltraEngine;

int main(int argc, const char* argv[])
    auto displays = GetDisplays();
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);
    auto world = CreateWorld();
    auto framebuffer = CreateFramebuffer(window);

    auto camera = CreateCamera(world);
    camera->SetPosition(0, 0, -3);

    auto default_font = LoadFont("Fonts\\arial.ttf");
    auto ui = CreateInterface(world, default_font, framebuffer->GetSize());
    ui->root->SetColor(0.0f, 0.0f, 0.0f, 0.0f);

    auto ui_camera = CreateCamera(world, PROJECTION_ORTHOGRAPHIC);
    ui_camera->SetPosition((float)framebuffer->GetSize().x * 0.5f, (float)framebuffer->GetSize().y * 0.5f, 0);

    auto button = CreateButton("Button", 10, 10, 120, 30, ui->root);

    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
        while (PeekEvent()) {
            const Event ev = WaitEvent();
            if (ev.source == button && ev.id == EVENT_WIDGETACTION)

    return 0;


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