Peter, Is PointUtils.localToGlobal() not working for you? From what I understand it takes approach (1).
From: Peter Ent<mailto:p...@adobe.com.INVALID> Sent: Tuesday, August 29, 2017 11:29 PM To: dev@flex.apache.org<mailto:dev@flex.apache.org> Subject: [FlexJS] Finding (x,y) position Hi, While working on drag-and-drop, I've made an "interesting" discovery having to do with the HTML-side's x and y getter functions. Let's say you have a nesting of <div>s: <div style="position:relative" id="outer"> <div id="header" style="height:30px">…</div> <div id="wrapper"> <div id="inner"> <div class="ItemRenderer" id="first">…</div> </div> </div> </div> (this structure is similar to what is generated for DataGrid). If you attempt to get the y location of "first" itemRenderer, you will get 30 back as the answer. That happens because the y getter first looks to see if the object has a "top" style value and, finding none, returns its offsetTop. In this case, offsetTop is 30 and offsetParent is "outer". If you get the y value of "inner" you will also get 30 as the answer for the same reason. If each of the <div>s had position:relative (or absolute), then offsetTop would be as you would expect with each offsetParent being the <div> above it. Our layout functions (and x and y setters) do not normally set the position style on element. I removed this a good while ago. Now I am trying to place a drop target indicator and to do that I need accurate (x,y) locations. I have a couple of solutions: 1. For any element, look at its getBoundingClientRect and compare with its elementParent.getBoundingClientRect. The difference between then gives the child's position relative to the parent. This seems reliable. 2. Attempt to divine a child's position using the offset information. I can't make this work. 3. Modify the layouts to check the contentView's value of position and if not set already, set it to "relative". This makes the x and y getters return the right thing but may have unintended consequences. Any advice from seasoned JavaScript developers is greatly appreciated! Thanks, Peter
