Re: [Dynapi-Help] How do I drop stuff on a child layer (a layer that's ontop of another layer)???

[Richard Bennett]

Hi, What dragdrop.js does, is loop through all the children of the document, and check if they overlap with the source item. I added one layer of children checking, so if a layer has children they will be checked for overlapping. In the longrun I think a better way to do this, would be to see which layers have an eventlistener added to them, and only check them, instead of checking all layers like we do now. Do we have a collection of objects having an eventlistener now? (so we could do DynAPI.document.hasListener.length )   If you use this version of dragdrop.js it will support one level of children. (Not children of children etc.):   /*    DynAPI Distribution    DragDrop Extension      The DynAPI Distribution is distributed under the terms of the GNU LGPL license.      Requirements:  dynapi.api.* */ DynObject.prototype.DragDrop=function(s){  if (!this.children.length>0) return;  for (var i in this.children) {   var ch=this.children[i];   if (ch.x<s.x && ch.x+ch.w>s.x+s.w && ch.y<s.y && ch.y+ch.h>s.y+s.h){    if (!ch.children.length>0)ch.invokeEvent("drop");    else{     for (var i in ch.children) {     var chChild=ch.children[i];     if ((ch.x+chChild.x)<s.x && (ch.x+chChild.x)+chChild.w>s.x+s.w && (ch.y+chChild.y)<s.y && (ch.y+chChild.y)+chChild.h>s.y+s.h)chChild.invokeEvent("drop");     else ch.invokeEvent("drop");     };    };     };  }; }; DynDocument.prototype.DragDrop=DynObject.prototype.DragDrop;   If anyone has an idea on how to make the function recursive so it checks more than one layer deep, I'd be interested.   Another thing it does is check the exact size, so the event only fires if the block is dropped completely on the target from all sides, and not only top and left as before.   I also changed the source of the example a little, to demonstrate a more efficient way of using eventlisteners. (using one for all events). (attached)   I'll put the examples up when I upgrade to the latest code.   Cheers, Richard Bennett   [EMAIL PROTECTED] www.richardinfo.com (Everything running on, and ported to the 19/12/2000 snapshot of DynAPI2) visit the DynAPI homepage (and FAQ) :: http://dynapi.sourceforge.net/dynapi/index.php?menu=1 Browse (and search) the mailinglist here: http://www.mail-archive.com/index.php3?hunt=dynapi   ----- Original Message ----- From: Chris Shreve To: [EMAIL PROTECTED] Sent: Thursday, April 05, 2001 6:01 PM Subject: [Dynapi-Help] How do I drop stuff on a child layer (a layer that's ontop of another layer)??? All I want to do is drop something on a layer that is within (is a child of) another layer.  However, the 'ondrop' event for the child layer does not fire. I've included a ***very*** simple example that I think should work...but it doesn't.  Is this a problem with event bubbling in the DynAPI or do I just not know how to do this?   Thanks for any ideas.     Chris Shreve

Title: Test Drag & Drop Gilles