Extending Bitmap class

techdojo

Sorry if this is a daft question but...
I'm planning on writing a widget ui library and I was wondering would it be better to create a button class by extending a sprite or a bitmap.
If I extend a bitmap, do I have to provide the same parameters to .new (ie the Texture or Texture region) if not how do I call the parent constructor with the appropriate texture?

Lastly - as bitmap is derived from a sprite, I'm assuming it's possible to call addChild on the bitmap, if so is the parent bitmap drawn first and then the children or is the parent bitmap drawn last?

atilim

Hi @techdojo,

I would extend from Sprite. (and then I would create a Bitmap and add as a child at init)

> If I extend a bitmap, do I have to provide the same parameters to .new
yes. and this is the only way. currently we don't provide a method like super.

For all classes derived from Sprite (Bitmap, TileMap, TextField, Shape, etc) first the graphics item itself is drawn first and then the children are drawn last.

techdojo

I agree with you, I'd all but decided it would be cleaner to use sprite as a container rather than a bitmap and then add everything as child - I was just wondering if the potential efficiency saving was worth it (probably not).

As for the child draw order, that probably makes more sense to do it that way

Thanks for the help