biner88/chart_sparkline

Beautiful sparkline charts for Flutter

chart_sparkline's Issues

Animated Line Chart

Line Chart is perfect, but I need animation line for this chart.

Add a spacing property between the end of the graph and the value of this line

Feature Request: PointsMode - AtIndex

How easy would it be to add a new point mode that allowed you to specify the index in the data where the point should be? Happy to submit a PR if you'd like.

Need a way to edit the gridLineLabel text.

Hi we need a builder method so we can edit the way it is shown in the chart . Right now I want to show the label to represent euro with comma instead of dot.

Rendering the chart on a specific timeline

In case we have to render a chart like this which has space on the right, if you have an idea I'll be happy to contribute as well

fillColor does not work

Sparkline(
data: data,
fillMode: FillMode.below,
fillColor: Colors.red[200],
);

Above code does not work. Always get white background color. Can you please help.

A property to render line like avg line

Hi biner88, is there a possible way to render a line at a particular point or value like the line rendered at avg. of data ?

Canvas painting for the average value when grid lines are end

from

to

the canvas painting width is smaller when the grid lines are enabled..i've worked on a quick fix for that

_SfSparkLineChartState not updating

Angled Gradient Falloff from Gridlabel use

Whenever you add gridlabels to a gradient filled sparkline it causes the end to angle off instead of down

Label TextPainter Margin

Not sure if this is intended but there's a noticable gap on the right side of a plot with labels.

When I modify this line by removing the * 2, then the labels are drawn with minimal gap, which is what I'm looking for.

Thanks.

gridLineLabelPrecision shows illogical texts

in case of having the following data:

data: [-1.5, 1 - 0, 2 - 5, -1.5, 100, 5, -2.3]

with gridLineLabelPrecision: 3:

with gridLineLabelPrecision: 2:

after digging through the codebase, I discovered that this is not this package's fault, but it's a usage of the wrong function.

this package uses toStringAsPrecision on the values, which evaluates the following values like:

→   100.0.toStringAsPrecision(3)
    "100"
→   100.0.toStringAsPrecision(2)
    "1.0e+2"

I suggest adding a gridLineLabelFixed parameter, which would apply toStringAsFixed on the supplied data

Is there a way to add dashed line (similar to averageLine) with input value?

As with averageLine, is there a way to add horizontal dashed line with given value?

I am trying to add dashed line at start value to show changes from that point during chart span. Any help would be appreciated.

Thank you.

I could add a property that prevents the lines that cross the graph from being of a different color