[BUG] 'static lifetime requirement for AreaSeries

[JakeOShannessy]

Describe the bug
When using AreaSeries the backend is required to be 'static, e.g. BitmapBackend<'static>. This has a number of limitations, the simplest of which is that a filename passed to the backend must have a static lifetime. This is not the case with other series such as LineSeries. It seems AreaSeries takes a reference to the backend while others do not.

To Reproduce
I modified the area chart example from:

let root = BitMapBackend::new("plotters-doc-data/area-chart.png", (1024, 768)).into_drawing_area();

to:

let filename = "plotters-doc-data/area-chart.png".to_string();
let root = BitMapBackend::new(&filename, (1024, 768)).into_drawing_area();

After doing this the example would no longer compile. This reproduces my problem exactly.

Version Information
Both master and 0.2.9.

[38]

Hi @JakeOShannessy ,

Thanks for reporting this.
This is caused by strict lifetime bounds on the dynamic elements.
And this is fixed on master, I believe. It would be nice if you can confirm this on your side.

Close it for now and feel free to reopen it if needed.

Cheers,
Hao

[JakeOShannessy]

All fixed, thanks for the quick response.

[bart-sensirion-qm]

Hi, it seems this issue has returned. When using dynamic elements (for example by calling .to_dyn() on the elements you're drawing) the `static requirement returns. I noticed because the path parameter in the ::new call to the backend needed to be a reference with `static lifetime.