Query whether all, part or none of the group layers descendants are visible.
l_layer_groupVisibility(widget, layer)
widget | widget path or layer object of class |
---|---|
layer | layer id. If the widget argument is of class |
'all'
, 'part'
or 'none'
depending on the
visibility status of the descendants.
Visibile layers are rendered, invisible ones are not. If any
ancestor of a layer is set to be invisible then the layer is not rendered
either. The layer visibility flag can be checked with
l_layer_isVisible
and the actual visibility (i.e. are all the
ancesters visibile too) can be checked with
l_layer_layerVisibility
.
Note that layer visibility is not a state of the layer itself, instead is information that is part of the layer collection (i.e. its parent widget).
if(interactive()){ p <- l_plot() g <- l_layer_group(p) l1 <- l_layer_rectangle(p, x=0:1, y=0:1, parent=g) l2 <- l_layer_oval(p, x=0:1, y=0:1, parent=g) l_layer_groupVisibility(p, g) l_layer_hide(p, l2) l_layer_groupVisibility(p, g) l_layer_hide(p, l1) l_layer_groupVisibility(p, g) l_layer_hide(p, g) l_layer_groupVisibility(p, g) }