LC Server - Check for Screen size?

Sun Mar 21 07:51:35 EDT 2021

Hi Rick,
here's a sample with some put commands and comments for better understanding.
<?lc
-- read Cookie screeres if available
put $_COOKIE["screenres"] into tScreenRes

if tScreenRes is empty
then
	put "cookie not found. we need to write the cookie<br>"
-- the cookie does not exists or is empty, so we now executing JS, but 
-- the following closing tag is mandatory, otherwise the js is not executed
?>   
<script>
	let screenwidth = (screen.availWidth);
	let screenheight =(screen.availHeight);
	document.cookie = "screenres="+screenwidth +","+screenheight;
</script>
<?lc
	put "cookie written<br>"
else
	put "Cookie already there<br>"
end if

--now we extract height and width from the var tScreenRes
set the itemdelimiter to ","
put item 1 of tScreenRes to tWidth
put item 2 of tScreenRes to tHeight

--from here take action according the detected screenresolution.
?>

Note: The above script detects and uses the available screen resolution. 
Regards,

-
Matthias Rebbe
Life Is Too Short For Boring Code

> Am 21.03.2021 um 01:02 schrieb Rick Harrison via use-livecode <use-livecode at lists.runrev.com>:
> 
> Hi Matthias,
> 
> So you are thinking something like:
> 
> <!DOCTYPE html>
> <html>
> <body>
> 
> <h3>Your Screen:</h3>
> 
> <div id="demo"></div>
> 
> <script>
> var txt = "";
> txt += "<p>Total width/height: " + screen.width + "*" + screen.height + "</p>";
> txt += "<p>Available width/height: " + screen.availWidth + "*" + screen.availHeight + "</p>";
> txt += "<p>Color depth: " + screen.colorDepth + "</p>";
> txt += "<p>Color resolution: " + screen.pixelDepth + "</p>";
> 
> document.getElementById("demo").innerHTML = txt;
> </script>
> 
> </body>
> </html>
> 
> And then put the information into a Javascript cookie and then read the cookie value with an LC Server script.
> 
> I’ll see if I can get that to work.
> 
> Thanks!
> 
> Rick
> 
>> On Mar 20, 2021, at 6:10 PM, matthias rebbe via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> As Livecode Server runs on the server  there is no direct command/function in LC Server available for this task.
>> 
>> But you could use Javascript (document.cookie)  in your LC Server script  to write the screen resolution into a cookie and read that cookie then with your Livecode Server script.
>> 
>> 
>> -
>> Matthias Rebbe
>> Life Is Too Short For Boring Code
> 
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