Re: [Gwt-openlayers-users] How to force repaint of MapWidget

[Curtis J. <cu...@th...>]

zIndexes are how CSS defines what div blocks appear on top of overlapping
div blocks.  It's the normal concept of 3D space coordinates, where the z
axis is perpendicular to the screen.  The highest zIndex will be on top.
 I'm not expert either, this is the basics of what I know.
It's isn't difficult to change the default zIndexes of OpenLayers (but is
was difficult for me figure it out).  It is very likely that someone else
knows a better way. In my case, I was actually trying to make the map go
lower in the z ordering.  You may want yours to go higher.  I used FireBug
(Firefox plugin) to find the zIndex of the objects that were conflicting
with my map.  It took me a little while to find where OpenLayers was setting
it's z indexes.  They have a set of base indexes, and then build from there.
 If you over write the defaults, you can modify the z ordering of OpenLayers
objects.

This is the code I used:

        // OpenLayers default Z bases are 1000, 250, 750, 2000
private native JSObject getLowerMapZBase() /*-{
return { BaseLayer: -1000, Overlay: -750, Popup: -500, Control: 0 };
}-*/;

       MapOptions mapOptions = new MapOptions();
       mapOptions.setAttribute("Z_INDEX_BASE", getLowerMapZBase());



On Fri, Mar 20, 2009 at 12:48 PM, Farrukh Najmi <
fa...@we...> wrote:

>
> Thanks for the info. I am not familiar with zIndexes. Is there a solution
> to the problem?
>
> Curtis Jensen wrote:
>
>> It could be a zIndex problem.  I haven't been using SmartGWT, but I've ran
>> into this problem.  I've seen different browsers render it differently.
>>  OpenLayers uses zIndexes that are as high as 2000.  If there is something
>> higher than that, it could make the map appear to not show up.
>>
>> --
>> Curtis
>>
>>
>> On Fri, Mar 20, 2009 at 9:49 AM, Farrukh Najmi <
>> fa...@we... <mailto:fa...@we...>>
>> wrote:
>>
>>
>>    Hi Evgeny,
>>
>>    I believe you are using gwt-openlayers with SmartGWT. Did you run into
>>    repaint problems when UI was resized etc.?
>>    If so, how did you fix the problem?
>>
>>    I sometime see the MapWidget disappear alltogether and sometimes see
>>    just the scale control. In the latter case clciking
>>    on scale control shows the map.
>>
>>
>>    Farrukh Najmi wrote:
>>    > I am using MapWidget inside another GWT toolkit.
>>    > I find that sometime when the container for MapWidget is repainted
>>    > the MapWidget does not get repainted. Is there a way to force
>>    repaint
>>    > of MapWidget (Sorry if this may be a generic GWT question). Thanks.
>>
>>
> --
> Regards,
> Farrukh
>
> Web: http://www.wellfleetsoftware.com
>
>
>