imgui inputText/float/int duplicated characters

[XDinEuro]

Taking a build in example, point_cloud

If I focus on the text input, and type 1, it will appear 11 in input box, same as all characters (except backspace).

I checked the origin imgui project, it looks fine in its example.

I wonder if we used it in a wrong way ?

Bug Report

Please answer the following questions for yourself before reporting a bug.

• I checked the documentation and the forum but found no answer.
• I checked to make sure that this issue has not already been filed.

Environment

Select the following information.

• DART version: 6.14.4
• OS name and version name(or number): ubuntu22.04
• Compiler name and version number: gcc 11.4

Expected Behavior

The input box shows exactly what I typed.

Current Behavior

The input characters are duplicated.

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. build the project and examples
2. open point_cloud
3. focus on the input box by single click on it
4. type a number, like '1'

Code to Reproduce

[jslee02]

I was able to reproduce the issue with version 6.14.4, but it appears to be resolved in 6.15.0. This might be related to the changes in https://github.com/dartsim/dart/pull/1872/files. Could you try updating to 6.15.0?

[XDinEuro]

Thanks for the reply. I did the update and the behavior remains the same.

[jslee02]

Could you retry the build with -DDART_USE_SYSTEM_IMGUI=ON in CMake? The vendored imgui is a bit outdated. You may need to install the imgui package using a package manager of your choice.

[XDinEuro]

hey, I managed it by dong this: replace the imgui source files with up to date files from https://github.com/ocornut/imgui/, and keep the changes marked with MODIFIED FOR DART in https://github.com/dartsim/dart/blob/main/dart/external/imgui/imgui_impl_opengl2.cpp#L120 and resolve some compile errors. Eventually I made it with some effort.

Does it make sense to update the imgui source files to latest version in dart ?

[jslee02]

I'm glad to hear you found a workaround! Eventually, I plan to remove the IMGUI source from this repository. Originally, it was included because (1) IMGUI wasn’t available through package managers, and (2) modifications marked as "MODIFIED_FOR_DART" were necessary. However, these reasons no longer seem to apply.

To support this transition, I’ve added the DART_USE_SYSTEM_IMGUI option, allowing for an external IMGUI installation as a long-term solution.

Updating the IMGUI source in this repository is fine. Feel free to submit a PR for the update, but I would recommend using the DART_USE_SYSTEM_IMGUI option instead.