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View Full Version : crossbrowser moving layers around a page



tpeck
01-09-2012, 07:16 AM
Usually I can find what I need by doing a Googlesearch.

This time, I can't seem to find anything.

I need a crossbrowser method for moving layers around the screen. So simple an idea!

If it helps answer my query, here is the js for what I have already (a sort of horrible mess that works in IE):

PS - I can live with a jquery solution!



<!--
function MM_findObj(n, d) { //v3.0
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_dragLayer(objName,x,hL,hT,hW,hH,toFront,dropBack,cU,cD,cL,cR,targL,targT,tol,dropJS,et,dragJS) { //v3.0
//Copyright 1998 Macromedia, Inc. All rights reserved.
var i,j,aLayer,retVal,curDrag=null,NS=(navigator.appName=='Netscape'), curLeft, curTop;
if (!document.all && !document.layers) return false;
retVal = true; if(!NS && event) event.returnValue = true;
if (MM_dragLayer.arguments.length > 1) {
curDrag = MM_findObj(objName); if (!curDrag) return false;
if (!document.allLayers) { document.allLayers = new Array();
with (document) if (NS) { for (i=0; i<layers.length; i++) allLayers[i]=layers[i];
for (i=0; i<allLayers.length; i++) if (allLayers[i].document && allLayers[i].document.layers)
with (allLayers[i].document) for (j=0; j<layers.length; j++) allLayers[allLayers.length]=layers[j];
} else for (i=0;i<all.length;i++) if (all[i].style&&all[i].style.position) allLayers[allLayers.length]=all[i];}
curDrag.MM_dragOk=true; curDrag.MM_targL=targL; curDrag.MM_targT=targT;
curDrag.MM_tol=Math.pow(tol,2); curDrag.MM_hLeft=hL; curDrag.MM_hTop=hT;
curDrag.MM_hWidth=hW; curDrag.MM_hHeight=hH; curDrag.MM_toFront=toFront;
curDrag.MM_dropBack=dropBack; curDrag.MM_dropJS=dropJS;
curDrag.MM_everyTime=et; curDrag.MM_dragJS=dragJS;
curDrag.MM_oldZ = (NS)?curDrag.zIndex:curDrag.style.zIndex;
curLeft= (NS)?curDrag.left:curDrag.style.pixelLeft; curDrag.MM_startL = curLeft;
curTop = (NS)?curDrag.top:curDrag.style.pixelTop; curDrag.MM_startT = curTop;
curDrag.MM_bL=(cL<0)?null:curLeft-cL; curDrag.MM_bT=(cU<0)?null:curTop -cU;
curDrag.MM_bR=(cR<0)?null:curLeft+cR; curDrag.MM_bB=(cD<0)?null:curTop +cD;
curDrag.MM_LEFTRIGHT=0; curDrag.MM_UPDOWN=0; curDrag.MM_SNAPPED=false; //use in your JS!
document.onmousedown = MM_dragLayer; document.onmouseup = MM_dragLayer;
if (NS) document.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
} else {
var theEvent = ((NS)?objName.type:event.type);
if (theEvent == 'mousedown') {
var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
var maxDragZ=null; document.MM_maxZ = 0;
for (i=0; i<document.allLayers.length; i++) { aLayer = document.allLayers[i];
var aLayerZ = (NS)?aLayer.zIndex:aLayer.style.zIndex;
if (aLayerZ > document.MM_maxZ) document.MM_maxZ = aLayerZ;
var isVisible = (((NS)?aLayer.visibility:aLayer.style.visibility).indexOf('hid') == -1);
if (aLayer.MM_dragOk != null && isVisible) with (aLayer) {
var parentL=0; var parentT=0;
if (!NS) { parentLayer = aLayer.parentElement;
while (parentLayer != null && parentLayer.style.position) {
parentL += parentLayer.offsetLeft; parentT += parentLayer.offsetTop;
parentLayer = parentLayer.parentElement; } }
var tmpX=mouseX-(((NS)?pageX:style.pixelLeft+parentL)+MM_hLeft);
var tmpY=mouseY-(((NS)?pageY:style.pixelTop +parentT)+MM_hTop);
var tmpW = MM_hWidth; if (tmpW <= 0) tmpW += ((NS)?clip.width :offsetWidth);
var tmpH = MM_hHeight; if (tmpH <= 0) tmpH += ((NS)?clip.height:offsetHeight);
if ((0 <= tmpX && tmpX < tmpW && 0 <= tmpY && tmpY < tmpH) && (maxDragZ == null
|| maxDragZ <= aLayerZ)) { curDrag = aLayer; maxDragZ = aLayerZ; } } }
if (curDrag) {
document.onmousemove = MM_dragLayer; if (NS) document.captureEvents(Event.MOUSEMOVE);
curLeft = (NS)?curDrag.left:curDrag.style.pixelLeft;
curTop = (NS)?curDrag.top:curDrag.style.pixelTop;
MM_oldX = mouseX - curLeft; MM_oldY = mouseY - curTop;
document.MM_curDrag = curDrag; curDrag.MM_SNAPPED=false;
if(curDrag.MM_toFront) {
eval('curDrag.'+((NS)?'':'style.')+'zIndex=document.MM_maxZ+1');
if (!curDrag.MM_dropBack) document.MM_maxZ++; }
retVal = false; if(!NS) event.returnValue = false;
} } else if (theEvent == 'mousemove') {
if (document.MM_curDrag) with (document.MM_curDrag) {
var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
newLeft = mouseX-MM_oldX; newTop = mouseY-MM_oldY;
if (MM_bL!=null) newLeft = Math.max(newLeft,MM_bL);
if (MM_bR!=null) newLeft = Math.min(newLeft,MM_bR);
if (MM_bT!=null) newTop = Math.max(newTop ,MM_bT);
if (MM_bB!=null) newTop = Math.min(newTop ,MM_bB);
MM_LEFTRIGHT = newLeft-MM_startL; MM_UPDOWN = newTop-MM_startT;
if (NS) {left = newLeft; top = newTop;}
else {style.pixelLeft = newLeft; style.pixelTop = newTop;}
if (MM_dragJS) eval(MM_dragJS);
retVal = false; if(!NS) event.returnValue = false;
} } else if (theEvent == 'mouseup') {
document.onmousemove = null;
if (NS) document.releaseEvents(Event.MOUSEMOVE);
if (NS) document.captureEvents(Event.MOUSEDOWN); //for mac NS
if (document.MM_curDrag) with (document.MM_curDrag) {
if (typeof MM_targL =='number' && typeof MM_targT == 'number' &&
(Math.pow(MM_targL-((NS)?left:style.pixelLeft),2)+
Math.pow(MM_targT-((NS)?top:style.pixelTop),2))<=MM_tol) {
if (NS) {left = MM_targL; top = MM_targT;}
else {style.pixelLeft = MM_targL; style.pixelTop = MM_targT;}
MM_SNAPPED = true; MM_LEFTRIGHT = MM_startL-MM_targL; MM_UPDOWN = MM_startT-MM_targT; }
if (MM_everyTime || MM_SNAPPED) eval(MM_dropJS);
if(MM_dropBack) {if (NS) zIndex = MM_oldZ; else style.zIndex = MM_oldZ;}
retVal = false; if(!NS) event.returnValue = false; }
document.MM_curDrag = null;
}
if (NS) document.routeEvent(objName);
} return retVal;
}
//-->

tpeck
01-19-2012, 12:52 AM
I found the answer with jquery here: http://jqueryui.com/demos/draggable/


<!doctype html>
<html>

<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js" type="text/javascript"></script>
<script src="ui.core.js" type="text/javascript"></script>
<script src="ui.draggable.js" type="text/javascript"></script>
<script type="text/javascript">
$(function() {
$("#draggable").draggable();
});
</script>
<style>
.content{
font-family: Arial;
font-weight: bold;
font-size: 13px;
color: #000000;
padding: 2px;
}
</style>
</head>

<body>
<div id="draggable" class="content" style="position:absolute; left:15px; top:100px; width:120; height:20; z-index:1; background-color: #FFFFFF; layer-background-color: #CCCCCC; border: 1px none #000000">
<center>Drag me around</center>
</div>
</body>

</html>



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