[Laszlo-dev] Query args width and height processed by LaszloCanvas.lzs#construct()

[Raju Bitter]

This is the behavior I see:

1) WORKS: Canvas resizes to full screen, debug window resizes with it  
(if debug is enabled)
<canvas width="100%" height="100%"
<object type="application/x-shockwave-flash"  
data="fullscreen2.lzx.swf8.swf?lzproxied=false" width="100%" heig\
ht="100%">
          <param name="movie" value="fullscreenexample/ 
fullscreen2.lzx.swf8.swf?lzproxied=false">
          <param name="quality" value="high">
          <param name="scale" value="noscale">
          <param name="salign" value="LT">
          <param name="allowFullScreen" value="true">
          <param name="menu" value="false"></object>

2) WORKS: Canvas resizes to full screen, debug window resizes with it  
(if debug enabled)
<canvas width="100%" height="100%"
<object type="application/x-shockwave-flash"  
data="fullscreen2.lzx.swf8.swf?lzproxied=false" width="600" heig\
ht="600">
          <param name="movie" value="fullscreenexample/ 
fullscreen2.lzx.swf8.swf?lzproxied=false">
          <param name="quality" value="high">
          <param name="scale" value="noscale">
          <param name="salign" value="LT">
          <param name="allowFullScreen" value="true">
          <param name="menu" value="false"></object>

3) WORKS: in normal mode at 800x800 pixel, going into full screen  
without problem, debug window resizes automatically. The passed values  
of 100%25 (URL encoded) for width and height have preference over the  
canvas settings in LZX
<canvas width="600" height="600"
<object type="application/x-shockwave-flash"  
data="fullscreen2.lzx.swf8.swf? 
lzproxied=false&width=100%25&height=100%25"\
  width="800" height="800">
          <param name="movie" value="fullscreenexample/ 
fullscreen2.lzx.swf8.swf?lzproxied=false">
          <param name="quality" value="high">
          <param name="scale" value="noscale">
          <param name="salign" value="LT">
          <param name="allowFullScreen" value="true">
          <param name="menu" value="false"></object>

4) PROBLEM: Reported values for canvas dimensions in normal display  
mode: canvas.width=500, canvas.height=400, but area covered by Flash  
movie is 800x800. In case the debug window is visible it's sized for  
the 500x400 dimension, but can be visibly dragged in an area of about  
800x600 pixels. Going into full screen canvas still reports 500x400  
pixels, debug window can be dragged in a larger area (around 800x600)
<canvas width="100%" height="100%"
<object type="application/x-shockwave-flash"  
data="fullscreen2.lzx.swf8.swf?lzproxied=false&width=500&height=4\
00" width="800" height="800">
          <param name="movie" value="fullscreenexample/ 
fullscreen2.lzx.swf8.swf?lzproxied=false">
          <param name="quality" value="high">
          <param name="scale" value="noscale">
          <param name="salign" value="LT">
          <param name="allowFullScreen" value="true">
          <param name="menu" value="false"></object>

5) PROBLEM: Application initially has dimension of 800x800, but  
centering takes place based on the 600x600 values for canvas. oes into  
full screen without any problems. The debug window resizes (if  
visible) on maximizing, but seems to miss the minimize event and stays  
large
<canvas width="600" height="600"
<object type="application/x-shockwave-flash"  
data="fullscreen2.lzx.swf8.swf?lzproxied=false" width="800" heigh\
t="800">
          <param name="movie" value="fullscreenexample/ 
fullscreen2.lzx.swf8.swf?lzproxied=false">
          <param name="quality" value="high">
          <param name="scale" value="noscale">
          <param name="salign" value="LT">
          <param name="allowFullScreen" value="true">
          <param name="menu" value="false"></object>

Does this make the situation clearer? I did all this testing to make  
sure everyone has the right understanding of how apps behave.

On Jul 21, 2009, at 5:09 PM, Max Carlson wrote:

> It seems full screen mode shows the application at the size  
> specified by the developer. If resizing is desired, percentage  
> values should be used for width/height - whether specified in the  
> query string, html embedding code, orcoming from the canvas.
>
> -----Original Message-----
> From: Raju Bitter <rajubitter at me.com>
> Sent: Monday, July 20, 2009 2:59 PM
> To: P T Withington <ptw at pobox.com>
> Cc: Max Carlson <max at laszlosystems.com>; Laszlo-dev bug reporting <laszlo-dev at openlaszlo.org 
> >
> Subject: Re: [Laszlo-dev] Query args width and height processed by  
> LaszloCanvas.lzs#construct()
>
> Yes, I know that the LaszloCanvas code is looking for those args.
> Isn't it like there are 4 sources for the width/height value?
>
> 1) canvas attributes
> 2) embedding code
> 3) query args for SWF file
> 4) default values 400/400, in case the query args contain an invalid
> value
>
> But what you are saying means: if a developer wants to use full screen
> feature, he must take caution not pass any values for width and height
> into the app at runtime, or full screen mode might not auto-adjust the
> canvas size.
>
>
> On Jul 20, 2009, at 5:18 PM, P T Withington wrote:
>
>> I don't know the history, but notice that the canvas is _looking_
>> for those params.  It's not that query params override an
>> application var or setting (which could be a security issue).  The
>> developer of the canvas specifically asks for these params.
>>
>> The history of canvas size is long and tortured, and there are a lot
>> of crazy paths in the compiler to handle absolute vs. percentage
>> sizing.  I am a big proponent for letting the size be dynamic, taken
>> from the browser or query args, rather than having to recompile your
>> app to resize it.
>>
>> On 2009-07-19, at 11:21EDT, Max Carlson wrote:
>>
>>> Perhaps we want a different behavior when fullscreen is on.  It
>>> should act much more like the default of 100% by 100%. Maybe the
>>> part of canvas.construct() that registers for screen size
>>> notifications should be refactored to a separate method so it can
>>> be called when fullscreen is turned on...
>>>
>>> -----Original Message-----
>>> From: Raju Bitter <rajubitter at me.com>
>>> Sent: Sunday, July 19, 2009 8:47 AM
>>> To: Raju Bitter <rajubitter at me.com>
>>> Cc: Laszlo-dev bug reporting <laszlo-dev at openlaszlo.org>
>>> Subject: Re: [Laszlo-dev] Query args width and height processed by
>>> LaszloCanvas.lzs#construct()
>>>
>>> And if you don't want to read the forum post: he attached a width  
>>> and
>>> height parameter to the SWF for whatever reason (customer
>>> requirement), and never expected that t
>
> [The entire original message is not included]