ImGui::InputText - Passing in first argument as empty string ("") makes the text box constantly lose focus

[dontna]

Version/Branch of Dear ImGui:

Version 1.90.1, Branch: master

Back-ends:

imgui_impl_glfw.cpp + imgui_impl_opengl3.cpp

Compiler, OS:

Arch Linux + G++

Full config/build information:

No response

Details:

If you pass in an empty string into the first argument of ImGui::InputText whenever it gets rendered it will unfocus, and you cannot type anything.

ImGui::InputText("", coolTextField, sizeof(coolTextField);

Everything compiles completely fine, you only see the issue once you run the compiled binary.

It can be an annoyance if you don't want any text to display next to the box, my hacky workaround was to pass in a "\t" like so:

ImGui::InputText("\t", coolTextField, sizeof(coolTextField));

Apologies in advance if I did something wrong, or this has been posted. I did look but I couldn't find anything myself.

Screenshots/Video:

No response

Minimal, Complete and Verifiable Example code:

// Here's some code anyone can copy and paste to reproduce your issue
ImGui::Begin("InputText Bug: Empty label unfocus");
char coolTextField[32];
ImGui::InputText("", coolTextField, sizeof(coolTextField));
ImGui::End();

[ocornut]

This is an invalid ID as it will conflict with the parent window ID.

You can use "##anything" as an ID.

This is answered in the first "Usage" section of the FAQ, with 5 items listed in bold in the index:
https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#q-how-can-i-have-widgets-with-an-empty-label

[ocornut]

In addition, and this is VERY IMPORTANT.
We DO detect this case and assert against it.
If I try to run your code I get this message:

That you didn't get the message means your asserts are not working or disabled. It is going to be really problematic using Dear ImGui if you don't have asserts enabled.

[dontna]

Ahh I'm sorry for that, I completely missed it in the FAQ; that's my bad.

Also you're also correct, I checked and my assert's were disabled.

I messed up, my apologies; I'll be more careful next time!

Thank you for your response anyway!