[Topic][Dumbfounded] Is there a way to resize and move a group without touching the inside objects

[Scott Rossi]

Hi Geoff:

What I like most about your routine is no need for using the boundingRect.
 And you're right, one needs to store all the original geometry for
continual resizing (at least, that's what I do).  I've also come across
what is apparently a scaling limitation (bug?) that affects scaling of a
control from it's center.  If a control is continually resized relative
its loc, LiveCode will eventually "see" the loc of the control as 1 pixel
less than what it was and shift the control's position, most likely due to
the rounding you noted.

Hopefully, RunRev's introduction of the shape object and sub pixel
positioning will minimize these scaling problems.

Regards,

Scott Rossi
Creative Director
Tactile Media, UX/UI Design




On 5/10/13 1:23 PM, "Geoff Canyon" <gcanyon at gmail.com> wrote:

>Hi Scott,
>
>I tried to simplify this and make it so that each control is adjusted in
>one step. This also optionally take different scaling factors for
>horizontal and vertical. Let me know if I missed anything. I'm not sure
>what everyone was seeing with resizing the group affecting the objects in
>it -- I'm not seeing that as far as I can tell.
>
>All the implementations shown so far are losing fidelity due to rounding.
>If anyone is going to repeatedly resize groups/objects like this, it would
>make sense to store the original rects as a separate property, and always
>start from there. If the resizing needs to be cumulative, then I'd store
>the cumulative resizing factor as a property of the group, then when
>resizing multiply that by the new/additional factor before applying that
>to
>the stored rects to set the sizes.
>
>Once we have open language, I'm so looking forward to being able to say
>something like:
>
>    set the rect of every control of G to
>integerRect(shiftRect(scaleRect(shiftRect((the rect of
>it),-L,-T),H,V),L,T))
>
>gc
>
>
>command scaleGroup G,H,V
>   if V is empty then put H into V
>   put the left of G into L
>   put the top of G into T
>   put shiftRect(scaleRect(shiftRect((the rect of G),-L,-T),H,V),L,T)
>into R
>   repeat with N = 1 to number of controls of G
>      set the rect of control N of G to
>integerRect(shiftRect(scaleRect(shiftRect((the rect of control N of
>G),-L,-T),H,V),L,T))
>   end repeat
>   set the margins of G to scaleRect((the margins of G),H,V)
>   set the rect of G to R
>end scaleGroup
>
>function scaleRect R,H,V
>   if V is empty then put H into V
>   return (H * item 1 of R),(V * item 2 of R),(H * item 3 of R),(V * item
>4
>of R)
>end scaleRect
>
>function shiftRect R,H,V
>   if V is empty then put H into V
>   return (H + item 1 of R),(V + item 2 of R),(H + item 3 of R),(V + item
>4
>of R)
>end shiftRect
>
>function integerRect R
>   return round(item 1 of R),round(item 2 of R),round(item 3 of
>R),round(item 4 of R)
>end integerRect
>
>
>On Fri, May 10, 2013 at 7:00 AM, Thomas McGrath III
><mcgrath3 at mac.com>wrote:
>
>> Monte,
>>
>> I won't be attending this year but I will be on the simulcast so I'll
>>sort
>> of be there in spirit at the conferenceŠ..
>>
>> Tom
>>
>> -- Tom McGrath III
>> http://lazyriver.on-rev.com
>> mcgrath3 at mac.com
>>
>> On May 10, 2013, at 1:15 AM, Monte Goulding
>><monte at sweattechnologies.com>
>> wrote:
>>
>> > I asked this exact question on StackOverflow a couple of weeks ago and
>> before I was attacked by Mark for not asking the question he answered we
>> were getting somewhere... I did create solution that works by retaining
>>an
>> offset for the child objects to use in their resizing.
>> >
>> >
>> 
>>http://stackoverflow.com/questions/16168091/how-do-you-change-the-rect-of
>>-a-group-without-changing-the-location-of-the-objec/16178454#16178454
>> >
>> > Anyway... all will be revealed at the conference on Tuesday
>> >
>> > On 10/05/2013, at 5:23 AM, Thomas McGrath III <mcgrath3 at mac.com>
>>wrote:
>> >
>> >> Is there a way to resize and move a scrolling group without touching
>> the inside contents of that group??? This is on mobile and I need to
>>resize
>> a scrolling group based on the position of the UI (navbar and toolbar
>>when
>> in portrait and landscape) when the UI changes and then after the
>>scrolling
>> group is right I then need to separately resize the contents for retina
>>if
>> needed -- to double their height, width and topleft -- or regular.
>> >>
>> >> If I resize the group first then it moves the content and then
>>doubling
>> the content makes it the right size but positioned wrong.
>> >> If I resize the content and then move the group then it again
>>correctly
>> sizes the contents but positions them wrong.
>> >>
>> >> If the group moves then everything is in a different position from
>>when
>> I laid them out in the desktop so they are off.
>> >>
>> >> I want the scrolling group code to be separate from the resizing code
>> if possible.
>> >>
>> >>
>> >> Thanks,
>> >>
>> >> Tom
>> >>
>> >> -- Tom McGrath III
>> >> http://lazyriver.on-rev.com
>> >> mcgrath3 at mac.com
>> >>
>> >>
>> >> _______________________________________________
>> >> use-livecode mailing list
>> >> use-livecode at lists.runrev.com
>> >> Please visit this url to subscribe, unsubscribe and manage your
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>> >
>> > --
>> > Monte Goulding
>> >
>> > M E R Goulding - software development services
>> > mergExt - There's an external for that!
>> >
>> >
>> >
>> >
>> >
>> > _______________________________________________
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