How to customize QLineEdit like Telegram InputField?

Rustamo

I'm keen on customizing QLineEdit like Telegram InputField.
Can any one guide me through?

Before focus
After focus

P.S.
I have tried to saw into Telegram src but it's really hard to read (

artwaw

@Rustamo Telegram's UI is, if I recall correctly, written in QML. What is your approach?

Rustamo

@artwaw I'm using Widgets. I'm aware that the key is to override paintEvent on subclassed QLineEdit. But dunno what to do next.

artwaw

@Rustamo You can override but, depending on how much you'd like to mimic to look of the original - which might be hard to do considering the differences between QML and Qt Widgets, you could attempt to insert actions with icons into leading and trailing position if the QLineEdit + apply custom stylesheet.

Rustamo

@artwaw I've added style for border and background color but the main problem is when focused placeholder text should animate to label at the top of QLineEdit

artwaw

@Rustamo If you just want to display placeholder as a label on the top - maybe setTooltip()?

Rustamo

@artwaw Perhaps I made mistake saying that placeholder needs to animate to QLabel. I saw solutions in QML where Text transforms or transitions using propertyanimations. Is it possible to the same sequence using widgets?

artwaw

@Rustamo I don't think it can be done out-of-the-box unless there is something in the Animation Framework (I never used it) https://doc.qt.io/qt-5/animation-overview.html

Rustamo

@artwaw Actually, Telegram is written in pure QWidgets

arun-holoplot

@Rustamo

here is a nice project which has a lot of customized widgets.

https://github.com/Wanderson-Magalhaes/PyBlackBox_Qt_Widgets_PySide6_Or_PyQt6_v1.0.0

hope it helps to get some idea about styling QLineEdit.

more tutorials can be found here -> https://www.youtube.com/c/WandersonIsMe/featured

artwaw

@Rustamo said in How to customize QLineEdit like Telegram InputField?:

Actually, Telegram is written in pure QWidgets

Ok, I might be wrong.
On macOS, when you inspect the bundle, it appears to be Swift anyway.