[OpenLayers-Dev] popups

[Tim Schaub]

Thanks for the description.  New question.

How do folks like to manage popup destruction?

Seems to me like it would be pretty typical to set "exclusive" to true 
when calling map.addPopup (one popup open at a time).  This means in a 
typical application, a popup would be created by a user click.  The DOM 
elements associated with this popup are removed in another user click. 
This doesn't give much chance for the popup creator to call destroy.

IE6 (unpatched) is horrendous with memory leaks and element.removeChild 
when child elements are listening for events with functions that contain 
cyclic structures.  This seems a pretty obvious source of memory leaks.

IE6 aside, it seems like I must be missing something with regard to a 
simple way to destroy popups.  Is the solution to have the sixth arg to 
the popup constructor (closeBoxCallback) set to something that calls 
destroy?

Tim

Christopher Schmidt wrote:
> On Sun, Apr 27, 2008 at 10:42:51AM -0600, Tim Schaub wrote:
>> Hey-
>>
>> Can someone describe the following to me:
>>
>> 1) OpenLayers.Popup
> 
> Simple div. Tied to a lat/lon, not an object. Always opens in a single
> direction. Generally not used: doesn't fit itself to the right area of
> the map, and doesn't provide a 'pretty' UI.
> 
>> 2) OpenLayers.Popup.Anchored
> 
> Simple div, tied to an object (like a marker) which provides an
> 'offset'. The offset is used to place the popup based on the lonlat, and
> the offset, based on the preferred relative position -- top left, bottom
> right, etc. Thsi is automatically calculated based on where the lonlat
> is in the map, designed to open the popup in the directin with the most
> space.
> 
>> 3) OpenLayers.Popup.AnchoredBubble
> 
> Same as above, but with rounded corners using Rico.Corner.
> 
>> 4) OpenLayers.Popup.Framed
> 
> Base class for image-based popups, which can be fixedRelativePosition or
> not. An image (defined in a property of the popup) is used to create the
> "GUI" aspect of the popup. A base class, this is never meant to be used
> excpet for extension.
> 
>> 5) OpenLayers.Popup.FramedCloud
> 
> A specific instance of the above: Provides image properties for a popup.
> 
> 
>> Seems to me like all popups are "anchored" and I can't tell what is the 
>> implied distinction in the words "bubble" and "cloud".
> 
> Anchored means 'has an offset, and can be offset relative to the
> position of its 'anchor''
> 
>> None of the above shed much light on the question "why so many, and 
>> which to use when?"  
> 
> I don't know if thsi helps at all, but, there it is.
> 
> Regards,