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hanleyhansen 21Apr2010 03:54

Assistance With JSP Code
 
I'm using a script from editsite.net to make rounded corners of my rectangles. The script works perfectly but I want to make a modification. The script is designed to get the background color of the site itself and put it as the background under the rounded corner. However, the sheet of my site is different than the background color so I want to change that in the script but can't seem to know how to properly go about it. Here's the entire script:

Code:

// Contributors
// Ilkka Huotari at http://www.editsite.net
// Mathieu 'p01' HENRI at http://www.p01.org/
// http://seky.nahory.net/2005/04/rounded-corners/
// Steven Wittens at http://www.acko.net/anti-aliased-nifty-corners
// Original Nifty Corners by Alessandro Fulciniti at http://pro.html.it/esempio/nifty/
function NiftyCheck() {
  if(!document.getElementById || !document.createElement) {
    return false;
  }
  var b = navigator.userAgent.toLowerCase();
  if (b.indexOf("msie 5") > 0 && b.indexOf("opera") == -1) {
    return false;
  }
  return true;
}

function Rounded(className, sizex, sizey, sizex_b, sizey_b) {
    var bk;
    if (!NiftyCheck()) return;
    if (typeof(sizex_b) == 'undefined')
        sizex_b = sizex;
    if (typeof(sizey_b) == 'undefined')
        sizey_b = sizey;
    var v = getElements(className);
    var l = v.length;
    for (var i = 0; i < l; i++) {
        color = get_current_style(v[i],"background-color","transparent");
        bk = get_current_style(v[i].parentNode,"background-color","transparent");
        AddRounded(v[i], bk, color, sizex, sizey, true);
        AddRounded(v[i], bk, color, sizex_b, sizey_b, false);
    }
}

Math.sqr = function (x) {
  return x*x;
};

function Blend(a, b, alpha) {

  var ca = Array(
    parseInt('0x' + a.substring(1, 3)),
    parseInt('0x' + a.substring(3, 5)),
    parseInt('0x' + a.substring(5, 7))
  );
  var cb = Array(
    parseInt('0x' + b.substring(1, 3)),
    parseInt('0x' + b.substring(3, 5)),
    parseInt('0x' + b.substring(5, 7))
  );
  return '#' + ('0'+Math.round(ca[0] + (cb[0] - ca[0])*alpha).toString(16)).slice(-2).toString(16)
            + ('0'+Math.round(ca[1] + (cb[1] - ca[1])*alpha).toString(16)).slice(-2).toString(16)
            + ('0'+Math.round(ca[2] + (cb[2] - ca[2])*alpha).toString(16)).slice(-2).toString(16);

  return '#' + ('0'+Math.round(ca[0] + (cb[0] - ca[0])*alpha).toString(16)).slice(-2).toString(16)
            + ('0'+Math.round(ca[1] + (cb[1] - ca[1])*alpha).toString(16)).slice(-2).toString(16)
            + ('0'+Math.round(ca[2] + (cb[2] - ca[2])*alpha).toString(16)).slice(-2).toString(16);
}

function AddRounded(el, bk, color, sizex, sizey, top) {
  if (!sizex && !sizey)
    return;
  var i, j;
  var d = document.createElement("div");
  d.style.backgroundColor = bk;
  var lastarc = 0;
  for (i = 1; i <= sizey; i++) {
    var coverage, arc2, arc3;
    // Find intersection of arc with bottom of pixel row
    arc = Math.sqrt(1.0 - Math.sqr(1.0 - i / sizey)) * sizex;
    // Calculate how many pixels are bg, fg and blended.
    var n_bg = sizex - Math.ceil(arc);
    var n_fg = Math.floor(lastarc);
    var n_aa = sizex - n_bg - n_fg;
    // Create pixel row wrapper
    var x = document.createElement("div");
    var y = d;
    x.style.margin = "0px " + n_bg + "px";
    x.style.height='1px';
    x.style.overflow='hidden';
    // Make a wrapper per anti-aliased pixel (at least one)
    for (j = 1; j <= n_aa; j++) {
      // Calculate coverage per pixel
      // (approximates circle by a line within the pixel)
      if (j == 1) {
        if (j == n_aa) {
          // Single pixel
          coverage = ((arc + lastarc) * .5) - n_fg;
        }
        else {
          // First in a run
          arc2 = Math.sqrt(1.0 - Math.sqr((sizex - n_bg - j + 1) / sizex)) * sizey;
          coverage = (arc2 - (sizey - i)) * (arc - n_fg - n_aa + 1) * .5;
          // Coverage is incorrect. Why?
          coverage = 0;
        }
      }
      else if (j == n_aa) {
        // Last in a run
        arc2 = Math.sqrt(1.0 - Math.sqr((sizex - n_bg - j + 1) / sizex)) * sizey;
        coverage = 1.0 - (1.0 - (arc2 - (sizey - i))) * (1.0 - (lastarc - n_fg)) * .5;
      }
      else {
        // Middle of a run
        arc3 = Math.sqrt(1.0 - Math.sqr((sizex - n_bg - j) / sizex)) * sizey;
        arc2 = Math.sqrt(1.0 - Math.sqr((sizex - n_bg - j + 1) / sizex)) * sizey;
        coverage = ((arc2 + arc3) * .5) - (sizey - i);
      }
     
      x.style.backgroundColor = Blend(bk, color, coverage);
      if (top)
          y.appendChild(x);
      else
          y.insertBefore(x, y.firstChild);
      y = x;
      var x = document.createElement("div");
        x.style.height='1px';
        x.style.overflow='hidden';
      x.style.margin = "0px 1px";
    }
    x.style.backgroundColor = color;
    if (top)
        y.appendChild(x);
    else
        y.insertBefore(x, y.firstChild);
    lastarc = arc;
  }
  if (top)
      el.insertBefore(d, el.firstChild);
  else
      el.appendChild(d);
}

function getElements(className) {
    var elements = [];
    var el = document.getElementsByTagName('DIV'); 
    var regexp=new RegExp("\\b"+className+"\\b");
    for (var i = 0; i < el.length; i++)
    {
        if (regexp.test(el[i].className))
            elements.push(el[i]);
    }
    return elements;
}

function get_current_style(element,property,not_accepted)
{
  var ee,i,val,apr;
  try
  {
    var cs=document.defaultView.getComputedStyle(element,'');
    val=cs.getPropertyValue(property);
  }
  catch(ee)
  {
    if(element.currentStyle)
      {
        apr=property.split("-");
        for(i=1;i<apr.length;i++) apr[i]=apr[i].toUpperCase();
        apr=apr.join("");
        val=element.currentStyle.getAttribute(apr);
  }
  }
  if((val.indexOf("rgba") > -1 || val==not_accepted) && element.parentNode)
  {
    if(element.parentNode != document)
        val=get_current_style(element.parentNode,property,not_accepted);
    else
        val = '#FFFFFF';
  }
  if (val.indexOf("rgb") > -1 && val.indexOf("rgba") == -1)
      val = rgb2hex(val);
  if (val.length == 4)
      val = '#'+val.substring(1,1)+val.substring(1,1)+val.substring(2,1)+val.substring(2,1)+val.substring(3,1)+val.substring(3,1);
  return val;
}

function rgb2hex(value)
{
    var x = 255;
    var hex = '';
    var i;
    var regexp=/([0-9]+)[, ]+([0-9]+)[, ]+([0-9]+)/;
    var array=regexp.exec(value);
    for(i=1;i<4;i++) hex += ('0'+parseInt(array[i]).toString(16)).slice(-2);
    return '#'+hex;
}

Any suggestions? Again what I would like to do is be able to specify the color that the script uses under the rounded corners. I don't want it to pull from the background color of the site. Any help would be appreciated. Thanks.

hanleyhansen 21Apr2010 04:02

Re: Assistance With JSP Code
 
Sorry, wrong forum. Can a moderator please move this to the Javascript forum? Thanks.

shabbir 21Apr2010 06:17

Re: Assistance With JSP Code
 
Quote:

Originally Posted by hanleyhansen (Post 67277)
Sorry, wrong forum. Can a moderator please move this to the Javascript forum? Thanks.

Done.

hanleyhansen 21Apr2010 06:41

Re: Assistance With JSP Code
 
Great! Thanks, shabbir! Hopefully now I get some replies.

SaswatPadhi 22Apr2010 21:26

Re: Assistance With JSP Code
 
Code: Java

color = get_current_style(v[i],"background-color","transparent");
bk = get_current_style(v[i].parentNode,"background-color","transparent");


So, the code detects the background-color of the element v[i] and sets it as fore-color.
Further it detects the background-color of the parent of v[i] and sets it as background color.

So, you might try changing those 2 lines.

hanleyhansen 22Apr2010 22:00

Re: Assistance With JSP Code
 
Thanks. That's what I assumed and that's as far as I got but I don't know what to change it to. What should I do if I want to specify the color instead of having it pulled?

SaswatPadhi 27Apr2010 11:21

Re: Assistance With JSP Code
 
Sorry, for late reply .. I wasn't online @ G4EF as I was stuck with something else ..
Anyway .. I guess you can directly specify the colors like #FF0000 for red etc ...
(Tell me if it doesn't work, I just roughly went through the above code .. may be I am wrong)

hanleyhansen 27Apr2010 16:06

Re: Assistance With JSP Code
 
I figure it out a few days ago. What I did was reference the color explicitly in the code. So this line:

Code:

color = get_current_style(v[i],"background-color","transparent");
bk = get_current_style(v[i].parentNode,"background-color","transparent");

Changed to this:

Code:

color = get_current_style(v[i],"background-color","transparent");
        bk = '#FFFFFF';

And that solved my problem.

SaswatPadhi 27Apr2010 18:28

Re: Assistance With JSP Code
 
So, I was right ! :)


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