On 2015-10-15 16:45, hh wrote:
The scalefactor SF of a button in a (non-background-) group on a card
is then
SF(stack) * SF(card) * SF(group) * SF(button).
The problem I am concerned about is actually the differing co-ordinate
systems at each level here and how that affects script - this proposal
is identical to anything which offers the ability to set a transform on
any object and so still suffers from it.
It's really simple, isn't it? And it works ...
Of course, posed as you have, it has made me realize that there is a
potentially feasible option right now.
We already have the 'fullScreenMode' property - which controls the
transform from 'card-space' to 'window-space'. This acts on the entire
content of the card and thus doesn't have a problem with any translation
of co-ordinate systems (as they don't change within the card).
What we didn't do was add the option of controlling this mapping
directly and have the result displayed in a window. This could be done
by adding a property which specifies the region of the card rect you
want stretched to fill the window.
So if your stack is 400x400 and you want to display the middle portion
(100,100,300,300); then you'd set something like:
set the visibleRect of stack ... to "100,100,300,300"
This would scale and translate the 200x200 middle rectangle to fill the
entire window.
The reason this is unaffected by my concerns about the action of script
in such an environment is that script actions are contained entirely
within the stack and objects within it. The co-ordinate transform
boundary happens between the OS and the window essentially - which is at
the globalLoc / localLoc level - the thing that changes is the mapping
between what script considers to be 'card-relative' (local) and
'screen-relative' (global). Script already has to take this into
account, as does the engine (which it does, otherwise fullScreenMode
wouldn't work).
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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