Solved

Dynamic TextArea ReSizing?

Posted on 2010-08-23
6
632 Views
Last Modified: 2012-05-10
I'm having trouble building a TextArea Resizing thing that when you put in text it will automaticly resize itself so there are no scrollbars.

the issues are that when I type in LOTS AND LOTS AND LOTS AND LOTS of text, there is a massize white gap beyond that of where the text originally stopped.

and if I do this.

wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww

it acts as 1 line and a scrollbar stays.

all in all, I'm needing some help with these, the below text is what I've been texting around with with no hope.

could anyone help me?
<script type="text/javascript">

adjustRows(document.formdata1.code);

</script>



<script type="text/javascript">	

	

			

	



function adjustRows(ta) {

    while(ta.scrollHeight > ta.offsetHeight) ta.rows++;

    adjustRows2(ta);

}



function adjustRows2(ta) {

   

        var lines = ta.value.split("\n");

        var linecount = lines.length;

        for (var line in lines)

            linecount += parseInt(lines[line].length / ta.cols);

        if (linecount > ta.rows)

            ta.rows = linecount + 1;

           

        if (linecount < ta.rows)

            ta.rows = linecount - 1;



}



function UpdateTextArea(t) {



//form1.pic.value=1+parseInt(form1.pic.value);

document.getElementById(t);

//adjustRows(document.form1.datarea);

var g = document.getElementById(t);

adjustRows(g);

}







//'.stripslashes($DD1[memo]).'

setInterval("UpdateTextArea('memo')", 1000);

</script>



<script>

function confirm_change(myfield){

	if (myfield.inchange)return;

	myfield.inchange=true;

	//myfield.value=myfield.value.toUpperCase();

	var o = document.getElementById("savestatus");

	o.innerHTML='Edited';

	UpdateTextArea(myfield);

	myfield.inchange=false;	

}

</script>











<script>

function test(myfield){

document.getElementById("test1").rows=10;

//document.getElementById("test2").rows=1;

//document.getElementById("test2").rows=Math.round(document.getElementById("test2").scrollHeight/18);



document.getElementById("test1").value=	'Row Count: '+document.getElementById("test2").rows+'\n'+

										'scrollHeight: '+document.getElementById("test2").scrollHeight+'\n'+

										'offsetHeight: '+document.getElementById("test2").offsetHeight+'\n'+

										'clientHeight: '+document.getElementById("test2").clientHeight+'\n'+

										'value.split: '+document.getElementById("test2").value.split("\n").length+'\n'+

										'Math.round: '+Math.round(document.getElementById("test2").scrollHeight/18)+'\n'+

										'scrollWidth: '+document.getElementById("test2").scrollWidth+'\n'+

										'offsetWidth: '+document.getElementById("test2").offsetWidth+'\n'+

										'clientWidth: '+document.getElementById("test2").clientWidth

									

										



;

										

										

								

	while(document.getElementById("test2").scrollHeight > document.getElementById("test2").offsetHeight) //I use offsetHeight rather than clientHeight because scrollHeight is always bigger than clientHeight in Opera on textareas

        document.getElementById("test2").rows++;



document.getElementById("aa").value=document.getElementById("test2").rows;

//document.getElementById("test2").rows=document.getElementById("test2").value.split("\n").length;







if(document.getElementById("test2").value.split("\n").length < document.getElementById("test2").rows){

	//if split is less then we use split, because we've deleted a row.

	document.getElementById("test2").rows=document.getElementById("test2").value.split("\n").length;

}



}

</script>

<script>

function test2(o){

	document.getElementById("test2").rows=1;

	while(document.getElementById("test2").scrollHeight > document.getElementById("test2").offsetHeight)

        document.getElementById("test2").rows++;



}



function test3(o){

	document.getElementById("test2").rows=Math.floor(document.getElementById("test2").value.length / document.getElementById("test2").cols) + 1

	

}







function fixTextSize(textfield, maxheight) {

textfield.autoSize = true;

thistextsize = 10; // Start at 10pt size

thisheight = thistext.textHeight; // Get current height



myTextFormat = new TextFormat(); // Instance of TextFormat object required



// Loop until height exceeds limit, font getting bigger each time

while (thisheight < maxheight) {

thistextsize++;

myTextFormat.size = thistextsize;	

textfield.setTextFormat(myTextFormat);

thisheight = thistext.textHeight;

}



// Reduce size by 1 as we have exceeded limits

thistextsize--;

myTextFormat.size = thistextsize;	

textfield.setTextFormat(myTextFormat);

}

</script>









<div id="savestatus"> </div>



<textarea id="aa" name="memo1" onclick="adjustRows(this);">uoiiufuipouyfi</textarea><br />

<br />

<textarea name="memo" onchange="adjustRows(this);">uoiiufuipouyfi</textarea>



<br /><br />

<br />



Info Table:<br /><textarea id="test1" name="memo1" onchange="test(this);">uoiiufuipouyfi</textarea>

<br />

Result Table:<br />



<textarea id="test2" name="memo2" onchange="test3(this);">uoiiufuipouyfi</textarea>

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0
Comment
Question by:eNarc
  • 3
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6 Comments
 
LVL 21

Accepted Solution

by:
chapmanjw earned 334 total points
ID: 33506383
0
 
LVL 5

Author Comment

by:eNarc
ID: 33509544
whats prototype?
0
 
LVL 5

Author Comment

by:eNarc
ID: 33509942
http:#33506383 chapmanjw

I'm unable to use that since its about 150+k in size and this is for a mobile website, so bandwidth is needing to be low in size.
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LVL 21

Assisted Solution

by:chapmanjw
chapmanjw earned 334 total points
ID: 33511057
Have you tried compressing it?  Or setting up compression on your web server?
0
 
LVL 108

Assisted Solution

by:Ray Paseur
Ray Paseur earned 166 total points
ID: 33511723
I can't vouch for this on mobile devices, but you might want to look into the TinyMCE textarea replacement.  I think it's used by Wordpress, and they have a mobile app or plug-in of some sort.

Also this seach might turn up something useful:
http://lmgtfy.com?q=mobile+textarea

;-)

~Ray
0
 
LVL 5

Author Comment

by:eNarc
ID: 33541117
I think for now I'll just stick with the below.

document.getElementById("test2").rows=1;
      while(document.getElementById("test2").scrollHeight > document.getElementById("test2").offsetHeight)
        document.getElementById("test2").rows++;

it puts the row at 1 and then begins increasing the memo size,

that way the scroll will always disappear,  and used with onchange, will allow for deleteing lines and adding lines.
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