Closed
Description
The Bug
Most mouse movement deltas are unusable due to being rounded to zero after the smooth scrolling update. Unless rapid mouse movements are applied, the deltas are almost certainly zero.
1.0.0
Textual-1.0.0.webm
2.0.4
Textual-2.0.4.webm
Expected behaviour would be the original, unless this was intended side effect when converting to integers to the new properties, as most of the float values are below/above ±0.5 depending on if its a negative value or not, so they get rounded to zero.
One idea would be to give the user access to the float values, but that seems a bit half baked, as the new properties would become mostly useless.
Another idea would be clamping the values to ±1 or the closest none-zero value.
MRE
from textual.app import App, ComposeResult
from textual.events import MouseMove
from textual.widgets import Placeholder
class BugReportApp(App):
def on_mouse_move(self, event: MouseMove) -> None:
print(f"{event.delta_x=} {event.delta_y=}")
if __name__ == "__main__":
BugReportApp().run()Textual Diagnostics
Versions
| Name | Value |
|---|---|
| Textual | 2.0.4 |
| Rich | 13.9.4 |
Python
| Name | Value |
|---|---|
| Version | 3.12.5 |
| Implementation | CPython |
| Compiler | GCC 14.2.1 20240801 (Red Hat 14.2.1-1) |
| Executable | /home/dk/dev/tmp/textual-sandbox/.venv/bin/python3 |
Operating System
| Name | Value |
|---|---|
| System | Linux |
| Release | 6.12.13-100.fc40.x86_64 |
| Version | #1 SMP PREEMPT_DYNAMIC Sat Feb 8 17:10:01 UTC 2025 |
Terminal
| Name | Value |
|---|---|
| Terminal Application | Kitty |
| TERM | xterm-kitty |
| COLORTERM | truecolor |
| FORCE_COLOR | Not set |
| NO_COLOR | Not set |
Rich Console options
| Name | Value |
|---|---|
| size | width=274, height=54 |
| legacy_windows | False |
| min_width | 1 |
| max_width | 274 |
| is_terminal | True |
| encoding | utf-8 |
| max_height | 54 |
| justify | None |
| overflow | None |
| no_wrap | False |
| highlight | None |
| markup | None |
| height | None |
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