Hide placeholder before display entered text in TextInput

[kubiix]

This pull request makes a minor improvement to the BuildTextInput method in ImGuiTextInputHelper.cs. The change ensures that when the text input is focused, the internal edit buffer (this.text) is preferred over the external text parameter, so the placeholder is hidden immediately. This enhances the user experience by making the placeholder disappear as soon as the input gains focus.

[veger]

Nice catch

[DaleStan]

Looks good to me, too.

[shpaass]

So that we are all on the same page, can you please explain

1. the difference between text and this.text in the current context,
2. how the unpatched version led to the unwanted behavior,
3. how the patched version fixes that.

If you use an LLM for that, like you did for the PR descriptions, then please make sure that you answer the questions without resorting to the Linkedin level of corporate speech.

[veger]

Without knowing what text or this.text is, I can answer 2 & 3: The if-statement checked for text and then processed with using this.text. The check to see if text is not empty does not match the action of using this.text.

That is why it is an issue and why this fixes it.

With the provided comment (and the else branch), I can guess that text is the typed text. So this.text is the 'internal edit buffer' (no idea what this buffer does though, I'd need to check the code outside of this PR...)