Hidden or invisible layers are not rendered. This function unhides invisible layer so that they are rendered again.
l_layer_show(widget, layer)
widget | widget path or layer object of class |
---|---|
layer | layer id. If the widget argument is of class |
0 if success otherwise the function throws an error
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() l <- l_layer_rectangle(p, x=0:1, y=0:1, color="steelblue") l_layer_hide(p, l) l_layer_show(p, l) }