LC Server - Check for Screen size?

Mon Mar 22 07:29:55 EDT 2021

Matthias, thank you so much for the complete solution. I’m such a beginner with LC server (and not even a beginner at JS) that your explanation was what I needed.
--
Scott Morrow

Elementary Software
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> On Mar 21, 2021, at 4:51 AM, matthias rebbe via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> 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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> 
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