On 10/25/2010 05:42 PM, Hermann Karl wrote:
> Dear List,
>
> If the status of the checkboxes of all layers of a categoriy is
> unchecked and the status of the checkbox
> on the categories is checked then the change of the status of the
> checkbox of the categories
> has no influence to the status of the checkboxes on the layers
> Also changing the status of the checkbox of all layers in a category to
> unchecked does not change the
> status of the checkbox on the categories
> Synchronization between checkboxes of category and layers occurs when
> checkboxes on layers are checked
>
> Karl
>


we already had this question a while ago...
http://sourceforge.net/mailarchive/forum.php?thread_name=C709F902-33B4-4F1D-BAAC-3F8F870C123C%40coin.hr&forum_name=pmapper-users

the categories-layer relation is:

layers are only enabled on the map if they themselves and their 
respective category are checked, and if they are defined visible for the 
current scale. If after a zoom the layer is into a scale where it should 
not be displayed (setting in the map file), it is just greyed out, and 
will get the normal color and become enabled when the scale is in the 
range of scale-denominators for the layer.

If I uncheck the category then the layer checkboxes become grey 
(de-activated, but not unchecked), and the layer is disabled from the 
map. But neither unchecking a category will uncheck all layers below, 
nor will unchecking all layers uncheck the parent category.

This I found the most logical behaviour of all studied possibilities 
(and I do not like other implementations I've seen so far). If it does 
not work like that, then it's a bug, otherwise it's a feature ;-)

If anybody wishes a different behaviour then he/she is free to change 
this  according to his/her preferences.

armin


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