TileLayer Error using Mapping (on_image_error)

[Michel7GitHub]

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• I have searched the opened issues and there are no duplicates

Describe the bug

I use Windows 11 (Flet 0.24.1) and IOS mobiles (Ipad & Iphone) with Flet App version 0.24.1.
When I drag or zoom-in /zoom-out quickly, I have frequent errors from "Event handler for image error events."
Once, I get an error, refreshing becomes quite slow.
I get the error on all environments : Windows, Iphone and Ipad.
I tried to use few different tile providers (OpenStreetMap, OnTopoMap, Google, MapTile) and have same problem with all.
However, using OpenTopoMap gives more frequent errors.

import flet as ft
import flet.map as map

def main(page: ft.Page):

    def handle_event(e: map.MapEvent):
        if e.source == map.MapEventSource.DRAG_END:
            print("Drag_END ............. \n", e.source)
            
    page.add(
        map.Map(
            expand=True,
            configuration=map.MapConfiguration(
                initial_center=map.MapLatitudeLongitude(27.66, -15.58),
                initial_zoom=10,
                interaction_configuration=map.MapInteractionConfiguration(
                    flags=map.MapInteractiveFlag.ALL
                ),
                on_event=handle_event
            ),
            layers=[
                map.TileLayer(
                    #url_template="http://mt1.google.com/vt/lyrs=p&hl=en&x={x}&y={y}&z={z}",
                    url_template="https://tile.openstreetmap.org/{z}/{x}/{y}.png",
                    url_template="http://c.tile.opentopomap.org/{z}/{x}/{y}.png",
                    on_image_error=lambda e: print("TileLayer Error"),
                ),
                map.MarkerLayer(
                    markers=[
                        map.Marker(
                            content=ft.Icon(ft.icons.LOCATION_ON),
                            coordinates=map.MapLatitudeLongitude(15, 10), rotate=False
                        ),
                    ],
                )
            ],
        ),
    )

ft.app(target=main, view=ft.AppView.WEB_BROWSER)

Code sample

Code

[Paste your code here]

To reproduce

Try the code I sent.
Quickly Drag / zoom-in zoom-out in different regions of the map.
You should have an error...

Expected behavior

No response

Screenshots / Videos

Captures

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Operating System

Windows

Operating system details

Windows 11

Flet version

0.24.1

Regression

I'm not sure / I don't know

Suggestions

No response

Logs

Logs

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Additional details

No response

[ndonkoHenri]

I guess zooming in and out quickly hinders proper/timely fetching and display of the map tiles.

Can you give the pre-release a try? We made some enhancements, which might hopefully fix this.
pip install flet --pre -U

[Michel7GitHub]

Hi ndonkoHenri,
Sorry for this long delay. I was out of the country for 2 weeks.
First I installed pre-release using pip install flet --pre -U.
I made a first test on Windows environment. I've got the following error : TypeError: MapConfiguration.__init__() got an unexpected keyword argument 'on_event'.
I removed 'on_event' line just to see if pre-release can solve the TileLayer Error ... but It doesn't change the problem I have.
I made a second test on my iPhone. I can't see map (blank screen)!
Conclusion, pre-release caused a new problem.
If I can help, let me know.
Regards,
Michel