Question 1

How to add a gradient fill to a sparkline in Flutter?

Accepted Answer

Use the fillGradient property with a LinearGradient, specifying begin and end alignments and colors, as shown in the README's fill example. This creates visually appealing shaded areas above or below the line.

Question 2

flutter_sparkline vs fl_chart for simple charts?

Accepted Answer

flutter_sparkline is ideal for lightweight, embeddable sparklines with minimal code, while fl_chart offers broader chart types and features but with more complexity. Choose based on whether you need only sparklines or a full charting suite.

Question 3

Can I animate sparkline data changes with this package?

Accepted Answer

No, animation is not supported out of the box; the Todo list includes animation features as future enhancements. You would need to implement custom animations using Flutter's built-in animation controllers.

Question 4

How to show only the last data point in a sparkline?

Accepted Answer

Set pointsMode to PointsMode.last and adjust pointSize and pointColor for visibility, as demonstrated in the README's points section. This highlights the most recent data trend.

Question 5

Is flutter_sparkline actively maintained and updated?

Accepted Answer

Check the pub.dev page for version history and recent updates. The README's Todo list with unchecked items suggests ongoing development, but some features may be slow to arrive.

Question 6

What happens with null or invalid data in flutter_sparkline?

Accepted Answer

The README doesn't specify error handling for null data, so developers need to ensure data lists are valid and non-null to avoid rendering issues, possibly requiring pre-processing.

Sparkline

What is Sparkline?

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