[solved] custom foregroundAlpha for an XYStepAreaRenderer

[BigDong]

Hi everyone,

I am trying to render a nice chart, with 3 datasets.
2 of them are sensibly identique, it's not a stacked renderer, so i need to make it more readable.

If I can find a way to customize the alphaforeground for each plot, It would really help.

I have checked all the differents demos, and none of them can fit the configuration I need.

Do you know if there is a way to customize ?

Ex :

[John Matthews]

Have you tried overriding getItemPaint()?

[BigDong]

How would that help ?

Returns the paint used to fill data items as they are drawn.

Returns:
The paint (never null).

[brimborium]

By overriding it, you could apply some alpha value to the paint before forwarding it. Whenever the paint is needed from the painting methods, they will use that modified paint.

That's at least what I think he meant by his suggestion. Sounds like a good idea, that might work.

[BigDong]

Hi again, thanks, it work.

I didn't use getItemPaint, I just had to change my colorList with Color(r,g,b,a) and it worked great.

Thanks for the idea

[John Matthews]

brimborium wrote, "That's at least what I think he meant by his suggestion."

Exactly. The API goes on to say "You can override this method if you require different behaviour." There's a related example here that varies saturation, rather than alpha.