Clicking blank part of TextArea scrollbar moves the cursor instead of scrolling

[godlygeek]

Reproducer:

from textual.app import App, ComposeResult
from textual.widgets import TextArea

TEXT = """\
def hello(name):
    print("hello" + name)

def goodbye(name):
    print("goodbye" + name + " I will miss you and can't wait until the day when we might one day meet again, perhaps bumping into each other at a bustling cafe in a city far from home, surprised by the serendipity of the encounter and overjoyed to reunite with an old friend")
"""


class TextAreaExample(App):
    def compose(self) -> ComposeResult:
        yield TextArea(TEXT, language="python")


app = TextAreaExample()
if __name__ == "__main__":
    app.run()

Run that program, and then click the black part of the horizontal scrollbar, to the right of the "slider" part. That should jump the slider to the right, but it instead moves the cursor to the last column of the first line. Clicking and dragging the slider works as expected, but clicking next to the slider doesn't.

Weirdly, clicking it several times in a row does seem to make it eventually scroll right as it should - but it also selects from the first line of the text area to the last.

I was able to reproduce this in a few different terminal emulators, so I'm pretty sure it's Textual itself at fault.

Textual Diagnostics

Versions

Name	Value
Textual	0.42.0
Rich	13.7.0

Python

Name	Value
Version	3.11.4
Implementation	CPython
Compiler	GCC 10.2.1 20210110
Executable	/home/godlygeek/3ps/textual/venv/bin/python

Operating System

Name	Value
System	Linux
Release	6.1.62-08726-g0148b209c1d6
Version	#1 SMP PREEMPT_DYNAMIC Sun Nov 12 18:54:23 PST 2023

Terminal

Name	Value
Terminal Application	Unknown
TERM	xterm-256color
COLORTERM	Not set
FORCE_COLOR	Not set
NO_COLOR	Not set

Rich Console options

Name	Value
size	width=80, height=24
legacy_windows	False
min_width	1
max_width	80
is_terminal	True
encoding	utf-8
max_height	24
justify	None
overflow	None
no_wrap	False
highlight	None
markup	None
height	None

[github-actions]

We found the following entries in the FAQ which you may find helpful:

• How do I center a widget in a screen?
• Does Textual support images?
• How can I select and copy text in a Textual app?
• Why doesn't the DataTable scroll programmatically?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This is an automated reply, generated by FAQtory

[github-actions]

Don't forget to star the repository!

Follow @textualizeio for Textual updates.

[willmcgugan]

Thanks. Should be fixed in 0.43.1 (just released)