How to use ListView on_scroll event[Question]

[AthenaRoland]

Question

I want to get the diruation when I scroll the listview,but it didn't work
def Lrc_view_scroll(e: ft.OnScrollEvent):
print("true")
print(e.event_type)
print(e.direction)
lrc_view = ft.ListView(expand=True,on_scroll=Lrc_view_scroll)
for i in LrcRead(music_src).valuelist:
lrc_view.controls.append(
ft.Container(
margin=ft.margin.all(10),
content=ft.Text(i, color="white",size=22,text_align=ft.TextAlign.START)
)
)

Code sample

No response

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.

[AthenaRoland]

PS C:\Users\31198\Documents\FlavorDroid> & C:/Python311/python.exe c:/Users/31198/Documents/FlavorDroid/main.py
Task exception was never retrieved
future: <Task finished name='Task-14' coro=<__run_socket_server..on_event() done, defined at C:\Python311\Lib\site-packages\flet_runtime\app.py:217> exception=KeyError('sd')>
Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\flet_runtime\app.py", line 219, in on_event
await conn.sessions[e.sessionID].on_event_async(
File "C:\Python311\Lib\site-packages\flet_core\page.py", line 905, in on_event_async
await handler(ce)
File "C:\Python311\Lib\site-packages\flet_core\event_handler.py", line 18, in fn
ce = self.__result_converter(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 22, in
self.__on_scroll = EventHandler(lambda e: OnScrollEvent(e))
^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 134, in init
self.scroll_delta: Optional[float] = d["sd"]
~^^^^^^
KeyError: 'sd'
Task exception was never retrieved
future: <Task finished name='Task-15' coro=<__run_socket_server..on_event() done, defined at C:\Python311\Lib\site-packages\flet_runtime\app.py:217> exception=KeyError('sd')>
Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\flet_runtime\app.py", line 219, in on_event
await conn.sessions[e.sessionID].on_event_async(
File "C:\Python311\Lib\site-packages\flet_core\page.py", line 905, in on_event_async
await handler(ce)
File "C:\Python311\Lib\site-packages\flet_core\event_handler.py", line 18, in fn
ce = self.__result_converter(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 22, in
self.__on_scroll = EventHandler(lambda e: OnScrollEvent(e))
^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 134, in init
self.scroll_delta: Optional[float] = d["sd"]
~^^^^^^
KeyError: 'sd'
Task exception was never retrieved
future: <Task finished name='Task-16' coro=<__run_socket_server..on_event() done, defined at C:\Python311\Lib\site-packages\flet_runtime\app.py:217> exception=KeyError('dir')>
Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\flet_runtime\app.py", line 219, in on_event
await conn.sessions[e.sessionID].on_event_async(
File "C:\Python311\Lib\site-packages\flet_core\page.py", line 905, in on_event_async
await handler(ce)
File "C:\Python311\Lib\site-packages\flet_core\event_handler.py", line 18, in fn
ce = self.__result_converter(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 22, in
self.__on_scroll = EventHandler(lambda e: OnScrollEvent(e))
^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 135, in init
self.direction: Optional[str] = d["dir"]
~^^^^^^^
KeyError: 'dir'
Task exception was never retrieved
future: <Task finished name='Task-17' coro=<__run_socket_server..on_event() done, defined at C:\Python311\Lib\site-packages\flet_runtime\app.py:217> exception=KeyError('sd')>
Traceback (most recent call last):
File "C:\Python311\Lib\site-packages\flet_runtime\app.py", line 219, in on_event
await conn.sessions[e.sessionID].on_event_async(
File "C:\Python311\Lib\site-packages\flet_core\page.py", line 905, in on_event_async
await handler(ce)
File "C:\Python311\Lib\site-packages\flet_core\event_handler.py", line 18, in fn
ce = self.__result_converter(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 22, in
self.__on_scroll = EventHandler(lambda e: OnScrollEvent(e))
^^^^^^^^^^^^^^^^
File "C:\Python311\Lib\site-packages\flet_core\scrollable_control.py", line 134, in init
self.scroll_delta: Optional[float] = d["sd"]
~^^^^^^
KeyError: 'sd'
have error

[ndonkoHenri]

Issue has been fixed.
Give it a try by installing the latest Flet prerelease: pip install flet -U --pre (https://pypi.org/project/flet/#history)
Report if the issue persists.