Add flag to BitmapDisplayer.display(...) about where image was got

[nostra13]

Add flag to BitmapDisplayer.display(...) about where image was got: from memory cache, from disc cache, from network/other source.

@All_Users Comment here if you need this feature

[rfgamaral]

This means that in the case of the FadeInBitmapDisplayer it would need to read the flag and fade or not accordingly to the flag, correct? Just to make sure... I think it could be a useful flag :)

[nostra13]

@rfgamaral Right.

[o-antsiferov]

I think this flag is not good enough. For example: I open the app, it starts to load images from web and, say, display them in a Gallery with FadeInBitmapDisplayer (flag = Source.WEB, cacheInDisk = true, cacheInMemory=false), ok, it's good - fade in effect must occur only FIRST time image is displayed, the next time - it shouldn't work. (falg = Source.DISK). In such a case this flag will help. But the next time when I open the app flag is always Source.DISK (if I don't delete saved image file), and inside FadeInBitmapDisplayer I don't know if it's first time the image is diplayed or not?

[nostra13]

@o-antsiferov I agree with you. But I don't want to add some kind of tracking of image loadings, like [imageUri <-> count of displayings], because it needs additional resources but this feature is used not so often, I think.

So I think I won't add flag to BitmapDisplayer. I'll just show how you can reach needed effect in sample project.

[nostra13]

@rfgamaral @o-antsiferov You can see the way to avoid animation on every image displaying in this commit 3945afc

[rfgamaral]

Ok, thanks :)