Can we have the ability to reverse the flow of a Sparkline so newest is on the left as opposed to the right

[rhacer63]

Sparklines flow right to left, would it be possible to add an option to get them to flow left to right?

[davep]

What would be the utility of this over reversing the data provided to the widget?

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

class ReversedSparklineApp(App[None]):

    DATA: list[float] = list(range(20))

    def compose(self) -> ComposeResult:
        yield Sparkline(self.DATA)
        yield Sparkline(list(reversed(self.DATA)))


if __name__ == "__main__":
    ReversedSparklineApp().run()

[rhacer63]

@davep

That's a good question, I have time-series data that fills in over time and I could reverse it, but it would still fill in right to left over time which while not a crisis would look a bit counter-intuitive.

Image below shows the data after about five polls.

As you can see the left is empty, if I reversed the data, the left would still be empty.

[davep]

I think I might be misunderstanding this somewhat. A Sparkline doesn't "fill" from either end, it shows all of the available data within the space of the Sparkline. For example:

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

class SparklineApp(App[None]):

    def compose(self) -> ComposeResult:
        for n in range(40):
            yield Sparkline(list(range(n+1)))


if __name__ == "__main__":
    SparklineApp().run()

giving:

the reversed version:

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

class SparklineApp(App[None]):

    def compose(self) -> ComposeResult:
        for n in range(40):
            yield Sparkline(list(reversed(range(n+1))))


if __name__ == "__main__":
    SparklineApp().run()

giving:

Do you think you could show a MRE of what you're doing to help better understand what you're looking for?

[rhacer63]

@davep

In sorting out that MRE, I think I got things sorted out. Thank you for your help.

[davep]

Glad to hear you got it sorted.