Hi,
I'm having an issue with Drag and Drop memory / cpu consumption which may be
a result of the way I refresh my DOM elements. Hopefully someone has done
the following before and knows where I'm going wrong. What I do is send my
javascript a set of html to inject (from my servlet), which includes divs of
a class that I turn into Draggables (and droppables) after injecting. I
don't explicitly destroy the old draggables, and I think that when I
overwrite the DOM elements through this injection, they are somehow kept
around by mochikit. Perhaps what I should do is find these old draggables
before injecting, delete them, then do as I do? Here is some code to
illustrate :
retrievePresentation: function(result)
{
//load the elements from the server to the html
var response = result.responseXML.documentElement;
var content="";
for( var i=0;
i<response.getElementsByTagName("contents")[0].childNodes.length; i++ ) {
content +=
response.getElementsByTagName("contents")[0].childNodes[i].data;
}
var destination =
response.getElementsByTagName("destination")[0].firstChild.data;
var drag_class =
response.getElementsByTagName("draggable_class")[0].firstChild.data;
var drop_class =
response.getElementsByTagName("droppable_class")[0].firstChild.data;
var presentationArea = document.getElementById(destination);
presentationArea.innerHTML=content;
//set up draggability if applicable
if( drag_class != "none" ) {
var allDraggablesArray =
MochiKit.DOM.getElementsByTagAndClassName('*', drag_class);
for(var aDraggable in allDraggablesArray) {
var widId = allDraggablesArray[aDraggable].id;
new MochiKit.DragAndDrop.Draggable(widId);
}
if( drop_class != "none" ) {
var allDroppablesArray =
MochiKit.DOM.getElementsByTagAndClassName('*', drop_class);
for(var aDroppable in allDroppablesArray) {
var widId = allDroppablesArray[aDroppable].id;
new MochiKit.DragAndDrop.Droppable(widId, { ondrop:
MochiKit.Base.bind(this.onDrop, this)});
}
}
}
}
Thanks for reading!
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