How to get cursor postion from a MultiLineEntry ?

[imjakey]

Hi every one,

I am developing an instant messaging application, and in order to implement the "@" mention feature in group chats, I need to display a dropdown list of people at the cursor position when the user types the "@" character in the input box. I have searched through all the documentation, but I couldn't find an API to get the current cursor position in the input box. How can I implement this functionality?

thank's a lot!

like this

[Jacalz]

You can use .CursorRow and .CursorColumn on your entry object.

https://pkg.go.dev/fyne.io/fyne/v2/widget#Entry

[imjakey]

@Jacalz Thank you for replay, in my case i need to show the popup window at the cursor position, how can i convert entry.CursorRow and entry.CursorColumn to a fyne.Position or any other method to get the absolute position of the cursor?

i have tried this piece of code, but not work:

pos := fyne.NewPos(float32(entry.CursorRow), float32(entry.CursorColumn))
popup.ShowAtPosition(pos)

where did I go wrong?

[imjakey]

Thanks again ! I'm really confused how to do this, please consider adding a public API .

[dweymouth]

I think it would get even more complicated than @Jacalz suggestion with scrolling. I think it's a reasonable feature request to have a CursorPosition() fyne.Position API - please open a feature request ticket @imjakey with the same context from this discussion

[andydotxyz]

Scrolling is a good point. Would the position be relative to the visible corner or the hidden source corner?
For the purpose of displaying a popup neither are the full answer as the absolute position is required. From the driver you can get absolute for the containing widget, but not including the scroll offset...

[imjakey]

@dweymouth I create it at #4382

Thanks for all the help.