Legends not updating?

[Peter Kingsbury]

Thanks for your reply!

I have found a way to enable the legend the way I want, only showing 
metadata-including layers. I've also modified the LegendTemplate widget 
(set ControlVisibility="true"). So far everything seems fine.

Now the issue exists where the layers will disappear after updating the 
map! The first click results in the proper "on" layer being hidden, but 
any non-default layers are hidden. A following update to the map will 
remove all layers except those controlled by the legend. Strange!

The "always on" rivers layer which stays put after the first Update, but 
disappears after subsequent updates, and a normal initially-invisible 
layer which the legend controls just fine:

    #----------------------------------
   
    LAYER
        GROUP    "Base Layers"
        NAME    "Rivers"
        TYPE    POLYGON
        DATA    rivers
        STATUS    DEFAULT
        CLASS
            NAME    "Rivers"
            COLOR     48 100 230
            OUTLINECOLOR 64 128 255
        END
        METADATA
            SHOWINLEGEND "no"
        END
    END

    LAYER
        GROUP    "Sites"
        NAME    "Sites"
        TYPE    POINT
        DATA    sites
        TOLERANCE 6
        STATUS    OFF
        HEADER '../query/query_header.html'
        FOOTER '../query/query_footer.html'
        MAXSCALE 30000

        METADATA
            SHOWINLEGEND "yes"
        END

        CLASSITEM "sites"
        LABELITEM "sites"
    END

    #----------------------------------

The legend template layer section:

[leg_layer_html order_metadata=legend_order opt_flag=15]
[if name=SHOWINLEGEND oper=eq value="yes"]
        <tr bgcolor="#ffffff">
            <td align="center" width=20>
                <input type="checkbox" name="legendlayername[]" 
value="[leg_layer_name]"
                    [if name=layer_status oper=eq  value=1]CHECKED[/if]
                    [if name=layer_status oper=eq value=2]CHECKED[/if]>
            </td>
       
            <td>
                <img src="[leg_icon width=20 height=18]" width="20" 
height="18">
            </td>
   

            <td>
                <span class="label">[leg_layer_name]</span>
            </td>
        </tr>
[/if]
[/leg_layer_html]

And finally, the LegendTemplate widget:

    <cwc2
        type="LegendTemplate"
        visible="true"
        embedded="true"
        template="legend_template.html"
        popupstyleresource="TextButtons"
        popupwidth="500"
        popupheight="400"
        status="false"
        menubar="false"
    />


Is this a circular catch-22 problem? Is there a way around this behavior?

Best regards,
- Peter







Ken Boss wrote:

>Peter--
>
>It's been awhile since I've thought about this (so take the advice with some salt), but my approach to the checkbox portion of html legends has been more along these lines:
>
>         <input type="radio" name="[leg_layer_name]" 
>           [if name=layer_status oper=neq value=0]
>             CHECKED
>           [/if]
>         >
>
>HTH,
>
>--Ken
>
>
>  
>
>>>>Peter Kingsbury <peter.kingsbury at GMAIL.COM> 8/31/2005 2:39:56 PM >>>
>>>>        
>>>>
>Hello all,
>
>Grief once again with my legends.
>
>The symptom is that, if the Layer status in the .MAP file is set to OFF, 
>the layer doesn't show up ... if set to ON, it shows up. This behavior 
>so far is normal.
>
>However, when checking/unchecking layers from the LegendTemplate widget, 
>then clicking Update, the page refreshes, and all layers listed in the 
>LegendTemplate become unchecked!
>
>I've gone through the documentation numerous times, and I am unable to 
>find anything that might be wrong with the code. I've also used the 
>sample legend template HTML code, which results in much the same 
>behavior. Not sure where to look at this point. Going to give it a go 
>again tomorrow.
>
>I've included the legend_template.html and widget code below.
>
>Any insight is appreciated!
>
>Best regards,
>- Peter
>
>
>
>---- legend_template.html ----
>[leg_group_html]
>    <tr>
>        <td colspan=3 bgcolor=#cccccc><b>[leg_group_name]</b></td>
>    </tr>
>[/leg_group_html]
>
>[leg_layer_html order_metadata=legend_order opt_flag=15]
>    <tr>
>        <td>
>            <input type=checkbox name=layer_status value=
>                     [if name=layer_status oper=eq value=1]on[/if]
>                     [if name=layer_status oper=eq value=0]off[/if]>
>        </td>
>        <td>
>            <img src="[leg_icon width=20 height=18]" width="20" height="18">
>        </td>
>        <td>
>            <span class="label">
>                [leg_layer_name]
>            </span>
>        </td>
>    </tr >
>[/leg_layer_html]
>---- end legend_template.html ----
>
>---- chameleon widget ----
>    <cwc2
>        type="LegendTemplate"
>        visible="true"
>        embedded="true"
>        template="legend_template.html"
>        popupstyleresource="TextButtons"
>        popupwidth="500"
>        popupheight="400"
>        status="false"
>        menubar="false"
>        controlvisibility="false"
>        />
>---- end chameleon widget ----
>
>  
>

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