Jump to content

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


Go to solution Solved by SpiderPig,

Recommended Posts

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;


  • Thanks 1
Link to comment
Share on other sites

  • 2 months later...
  • Solution

Just tested this.  Button needs to be set to nullptr (NULL) so that it is no longer keeping the widget alive.  You need to do both of these to delete the widget.  Well, it goes off screen so I'm going to assume it's gone for good. ;)

button = nullptr;


  • Thanks 2
  • Upvote 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...