[Users] Popup Window Anchor

[Sebastian Benthall]

Hi Dan,

I'm afraid I don't have any big ideas on this, but if you posted some code
up it might be easier to see what you're talking about.

This is actually a long-standing issue in GeoExt that is as old as the
popups themselves:
http://trac.geoext.org/ticket/5

If you were working on a generic solution or were interested in
collaborating on one, I would recommend getting a GeoExt sandbox and
developing the solution there.  I, for one, would be interested in working
on this with you.

On Thu, Nov 12, 2009 at 12:36 PM, Dan Ramage <dan at inlet.geol.sc.edu> wrote:

>  Greetings GeoExters, I am working on a restricted extents map and because
> of this, I’ve had to modify the behavior of the GeoExt.Popup(). The current
> popup always tries to position itself above the clicked on feature, and this
> will work if it is allowed to scroll the map. However with my map, it can’t
> do this, so it is possible that part of the popup will basically go through
> the top of the screen or off the right side, or even through the bottom.
> I’ve coded up a new position function that correctly positions the popup so
> this doesn’t happen. I am currently working on moving the anchor image as
> well, and have it correctly moving to the right side of the popup if the
> popup must be shifted left. What I am scratching my head on is if I need to
> position the popup under the feature, I need the anchor on top of the popup.
> Now, I’ve got a rotated anchor image(topanchor.png) and I’ve add a new style
> into the popup.css. I’ve also overloaded the base onRender and initComponent
> functions from the GeoExt.Popup() to add the new anchor. When the popup gets
> loaded now, I’ve got the normal downward pointing anchor as well as the
> upward pointed anchor. The upward pointing anchor is positioned under the
> downward pointing anchor. This is causing the code to calculate the height
> of the popup to be off as well:
>
> var anc = this.anc;
>
> var dx = anc.getLeft(true) + anc.getWidth() / 2;
>
> var dy = this.el.getHeight();
>
>
>
> dy is taking into account the height of the new topanchor.png.
>
>
>
> I am not sure how to initially position the upward pointing anchor to be on
> top of the popup. My thought is the entry in the popup.css file is what I
> need to change, but I am not 100% sure. The current entry I have is:
>
> .gx-popup-anctop{
>
> background:transparent url(../images/default/topanchor.png) no-repeat 0 0;
>
> position:relative;
>
> top:-1px;
>
> left:5px;
>
> z-index:2;
>
> height:16px;
>
> width:31px;}
>
>
>
> In the code, I will determine which anchor needs to be displayed and remove
> the other one.
>
>
>
> I appreciate any pointers!
>
>
>
>
>
> Dan
>
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>
>


-- 
Sebastian Benthall
OpenGeo - http://opengeo.org
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