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Dynamic TextArea ReSizing?

Posted on 2010-08-23
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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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Question by:eNarc
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6 Comments
 
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by:
chapmanjw earned 1336 total points
ID: 33506383
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Author Comment

by:eNarc
ID: 33509544
whats prototype?
0
 
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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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Assisted Solution

by:chapmanjw
chapmanjw earned 1336 total points
ID: 33511057
Have you tried compressing it?  Or setting up compression on your web server?
0
 
LVL 111

Assisted Solution

by:Ray Paseur
Ray Paseur earned 664 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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