[wx-dev] tree control & drawing

[Alan Shouls]

Hi Vadim,

>  OTOH I admit that even after I looked at the screenshot I
>still don't understand why do we need a bitmap here at all: don't 
>you just draw a colour gradient? And if so, why not use the 
>appropriate wxDC method?

For sure you could use a gradient. Generally UI artwork comes in as 
bitmap images - it makes changing the UI easier. This particular 
gradient came from a shipping App. I don't know what Apple's idea for 
the selection for "bigish things" in lists will be under OSX in a 
year's time but it may well be different.

>  Exactly. While I won't say that the design of the generic 
>wxTreeCtrl is ideal, you should take into account that it's not 
>really simple to improve it because as soon as you make this 
>PaintItem() virtual method part of public class interface you'll 
>also need to implement it for Win32 (which is definitely possible 
>but someone still needs to do it) and, in the future, for Mac OS 
>native data browser based implementation too.

OK - well what I will do is to get the interface for this as seems to 
make sense and then have a go at the windows end later.

Best regards

Alan Shouls