Built-in drag-select?

[arbitraryValue]

Is there support for drag selection (i.e. the way one can select multiple icons in Windows Explorer by moving the mouse while holding down the left mouse button) built in to CEGUI? I didn't find any documentation of such a feature, but maybe I am using the wrong search terms.

Edit: I should clarify that I am not looking for CEGUI to interact with my data and tell me which items were drag-selected. I'm only looking for the visual effect of drag-selecting.

Edit #2: I'm implementing the effect manually, and I've run into some trouble with transparency. If I have a parent window with child windows attached to it, how do I make it so the effective transparency at every pixel in the parent window is the same, regardless of how deep the stack of child windows at that pixel might be?

[Kulik]

AFAIK there is no facility in CEGUI doing drag multi select.

For the consistent transparency issue, there is something like InheritAlpha I think.

[arbitraryValue]

Maybe I'm doing something wrong, but with InheritAlpha I get each additional layer of child windows gradually reducing the overall transparency, the way multiple stacked semi-transparent images would. What I would like is the effect I would see if the parent window and its children (and their children, and so forth) were all rendered to a texture with no transparency, and that texture was then drawn to the screen with an alpha value designated by me.

[ShadowTiger]

Well my assumption (which might be wrong) is that if you are using interitalpha you should only set the alpha once, for the parent window, and have the rest be the default of 100% opaque.

Is that what you tried?

Also, when I drag select files in windows explorer, it does get darker when 2 overlapping transparencies occur (the items selected have a transparent outline, and the box also is transparent).

So what model are you using for how it is supposed to look?