[Laszlo-dev] [Platform-team] lz.colors question

[J Crowley]

Here's something else... I changed the example to:

<class name="box1" width="100" height="100" 
bgcolor="${lz.colors['gold4']}" />

<class name="box2" width="100" height="100" 
bgcolor="${lz.colors.iceblue1}" />

Which works fine in SWF8, but doesn't show the colors for the boxes in 
DHTML (If I remove the constraints from the first one, I get a compiler 
error, and if I remove them from the second, it shows black and gives an 
"Invalid value for bgcolor" message in the Debugger) and gives this 
error in SWF9:

TypeError: Error #1034: Type Coercion failed: cannot convert 
LzInheritedHash at 716ccd1 to LzEventable.
    at LzNode/applyConstraintMethod()[C:\Documents and 
Settings\laszlo\Local Settings\Temp\lzswf9\lzgen2652\LzNode.as:1048]
    at LzNode/applyConstraintExpr()[C:\Documents and 
Settings\laszlo\Local Settings\Temp\lzswf9\lzgen2652\LzNode.as:1083]
    at LzNode/__LZresolveReferences()[C:\Documents and 
Settings\laszlo\Local Settings\Temp\lzswf9\lzgen2652\LzNode.as:943]
    at LzNode/__LZcallInit()[C:\Documents and Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzNode.as:424]
    at LzCanvas/__LZcallInit()[C:\Documents and Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzCanvas.as:443]
    at LzCanvas/__LZinstantiationDone()[C:\Documents and 
Settings\laszlo\Local Settings\Temp\lzswf9\lzgen2652\LzCanvas.as:390]
    at LzInstantiatorService/makeSomeViews()[C:\Documents and 
Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzInstantiatorService.as:193]
    at LzInstantiatorService/checkQ()[C:\Documents and 
Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzInstantiatorService.as:130]
    at Function/http://adobe.com/AS3/2006/builtin::call()
    at LzEvent/sendEvent()[C:\Documents and Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzEvent.as:92]
    at LzIdleService/__idleupdate()[C:\Documents and 
Settings\laszlo\Local Settings\Temp\lzswf9\lzgen2652\LzIdleService.as:53]
    at LzIdleKernel$/__update()[C:\Documents and Settings\laszlo\Local 
Settings\Temp\lzswf9\lzgen2652\LzIdleKernel.as:27]


P T Withington wrote:
> But he should also be able to say:
>
>   bgcolor="iceblue"
>
> and/or
>
>   bgcolor="${this.acceptValue('iceblue', 'color')}"
>
> Which might be more instructive.  In the first case, you are 
> specifying a constant color, and since bgcolor is an attribute with a 
> type of `color` the token `iceblue` is acceptable as a value (not 
> tested).  In the second case, you are using a constraint, and (at 
> least as of now), constraints are simply expressions that _directly_ 
> set the value of an attribute -- they _do_not_ pass through the data 
> interface, which converts string representations into values according 
> to type.  (I think this is desirable.)  So, in the second case, I am 
> calling the (currently unpublished) `acceptValue` method, which takes 
> a string representation of a value and parses it according to the 
> specified type.
>
> There should be a better way.  Perhaps I should be able to say:
>
>   bgcolor="$accept{'iceblue'}"
>
> (meaning use acceptValue and the attribute's declared type to parse 
> the value of the expression)?  We've already got $path and $style, why 
> not $accept (unless someone can come up with a better name).  I think 
> this would allow me to say something like:
>
>   <inputtext id="color" />
>   <view bgcolor="$accept{color.text}" />
>
> would that be useful?
>
>
> On 2008-11-13, at 21:16EST, Max Carlson wrote:
>
>> You should be able to just set it to bgcolor="lz.colors.iceblue4" - 
>> constraints shouldn't be required.  Also note that colors aren't in 
>> global[] anymore - use lz.colors[''] instead.
>>
>> J Crowley wrote:
>>> So, I'm working on fixing one of the color dguide examples.  The 
>>> description on the doc page (docs/developers/color.html) reads:
>>> -----
>>> To specify any color but the 16 which are usable by name, use 
>>> 0xFFFFFF hex codes. Alternatively, the non-standard colors named in 
>>> |lps/components/base/colors.lzx| were added to OpenLaszlo's global 
>>> namespace. Those colors can also be employed by name, but note the 
>>> ${constraint} syntax around the bgcolor specification. There are two 
>>> ways to make the constraint: |bgcolor="${global['iceblue1']}"| is 
>>> the same as |bgcolor="${iceblue1}"|.
>>> -----
>>> The example this describes is:
>>> -----
>>> <canvas debug="true">
>>> <simplelayout axis="x" spacing="10"/>
>>> <class name="box1" width="100" height="100" 
>>> bgcolor="${global['gold4']}" />
>>> <class name="box2" width="100" height="100" bgcolor="${iceblue1}" />
>>> <box1 id="sun">
>>>   <text text="Sun"/>
>>> </box1>
>>> <box2 id="mystic">
>>>   <text fgcolor="0xFFFFFF" text="Mystic"/>
>>> </box2>
>>>  </canvas>
>>> -----
>>> Thing is, the only way to get the example to work is to change 
>>> bgcolor="${iceblue1}" to bgcolor="${lz.colors.iceblue1}", and trying 
>>> to use the global['gold4'] syntax doesn't actually work.  So my 
>>> question is:  Is the description in the documentation wrong?  
>>> Because doing it the way the description states results in a 
>>> Debugger error.  (Keep in mind I'm using the docs on openlaszlo.org, 
>>> since I can't build locally, so if the description has already been 
>>> changed, let me know and I won't file the bug, but I do need to fix 
>>> the example.  What I need to know then is, what is the new way of 
>>> doing this?)
>>> Thanks!
>>> Josh
>>
>> -- 
>> Regards,
>> Max Carlson
>> OpenLaszlo.org
>
>