[Lazarus] Inconsistent ScrolledClientRect calculation
DrDiettrich1 at aol.com
Fri Oct 7 16:09:59 CEST 2011
Mattias Gaertner schrieb:
> > > ClientRect Left,Top is 0,0, so Right=ClientWidth and
> > Is this really consistent with a scrolled client area, inner borders,
> > swapped scrollbars in BiDi mode etc.?
> I'm not sure what you mean with "inner borders".
See e.g. TControlBorderSpacing. A comment also mentions that group boxes
have their frame inside their client area.
> The ClientRect excludes scrollbars and is relative to the left, top of
> the visible client area (so Left,Top are almost always 0,0). So for
> almost all uses it is simply the size of the visible area, where a
> control can paint and gets mouse events.
A control can paint everything within its *bounds*, e.g. frames and
bevels. The *client area* is reserved for child controls, as the name
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