Building `Drag-and-Drop` DIVs: Polishing the Look and Feel - Putting the pieces together: listing the full code for DOM-based dragging DIVs
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To summarize, here’s the full source code for building DOM-based dragging DIV elements:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>DRAG-AND-DROP DOM-BASED WINDOWS</title>
<script type="text/javascript" src="path-to-
library/x_core.js"></script>
<script type="text/javascript" src="path-to-
library/x_event.js"></script>
<script type="text/javascript" src="path-to-
library/x_drag.js"></script>
<script type="text/javascript">
// create div element
function DOMDiv(x,y,w,h,col){
var div=document.createElement('div');
div.style.position='absolute';
div.style.left=x+'px';
div.style.top=y+'px';
div.style.width=w+'px';
div.style.height=h+'px';
div.style.backgroundColor=col;
div.style.padding='0';
return div
}
// create DOM window
function DOMWindow(x,y,w,h,title,content){
// create window structure
var winBody=new DOMDiv(x,y,w,h,'#ccc');
// assign ID attribute
winBody.setAttribute('id','domdiv');
winBody.style.border='2px outset #aaa';
winBody.style.cursor='default';
// create window title bar
var titleBar=new DOMDiv(4,4,w-14,18,'#00c');
titleBar.style.font='bold 10pt Arial';
titleBar.style.color='#fff';
titleBar.style.paddingLeft='4px';
// create window 'content area'
var contentArea=new DOMDiv(4,26,w-10,h-40,'#fff');
contentArea.style.width=document.all?(parseInt
(contentArea.style.width)-4)+'px':(parseInt
(contentArea.style.width)-7)+'px';
contentArea.style.border='1px inset #ccc';
contentArea.style.overflow='auto';
contentArea.style.padding='0px 2px 0px 4px';
contentArea.style.font='normal 10pt Arial';
// append title to title bar
titleBar.appendChild(document.createTextNode(title));
// append text to content area
contentArea.appendChild(document.createTextNode(content));
// append title bar
winBody.appendChild(titleBar);
// append content area
winBody.appendChild(contentArea);
// append window to document tree
document.getElementsByTagName('body')[0].appendChild(winBody);
}
// create 'domdiv' element and assign events
function initDomDiv(){
var domdiv=xGetElementById('domdiv');
xMoveTo(domdiv,100,100);
xEnableDrag(domdiv,domdivOnDragStart,domdivOnDrag);
xShow(domdiv);
}
function domdivOnDragStart(){}
// move 'domdiv' element
function domdivOnDrag(ele,mdx,mdy){
xMoveTo(ele,xLeft(ele)+mdx,xTop(ele)+mdy);
}
// display drag-and-drop div when page is loaded
window.onload=function(){
if(document.createElement&&document.
getElementById&&document.getElementsByTagName){
// display 'domdiv'
domWin=new DOMWindow(100,100,250,200,'Drag-and-drop DOM
Div','This dragging DIV element has been created with the DOM.');
// make 'domdiv' a dragging element
initDomDiv();
}
}
</script>
</head>
<body>
</body>
</html>
Bottom line
Before I wrap up this tutorial, a final note: the example I wrote earlier uses presentational JavaScript for styling each dragging DIV element, something that was discussed at the beginning of the article. However, you may want to utilize a CSS-based approach, in order to make your design stick a little closer to Web standards. The result will be nearly identical.
Now, it’s time to say goodbye. In this three-part series, I progressively went through the process for building drag-and-drop DIVs, ranging from writing a rather basic script to coding an advanced approach, by using the robust X library that Michael Foster allowed me to include in the corresponding examples. Thus, you have the knowledge and the tools for spicing up your web-based user interfaces utilizing true drag-and-drop DIVs. Wait are you waiting for? Go for it!
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