Application: gvSIG desktop

The groups of layers usually allow to set visible all the layers contained in it (for instance, we can call them "inclusive" groups). But if we want to turn off some layers, we have to uncheck them one by one. An useful improvement (especially when the group contains a lot of layers) could be to allow the creation of "exclusive" groups of layers, where the checkboxes on the left of the layer in the ToC are substituted by radiobuttons (like it happens in webmapping frameworks). So if we activate a layer, all the others in the group should be set not visible automatically.