Sets the selection mode of the layer.
NOTE: changing selection mode to %GTK_SELECTION_NONE, %GTK_SELECTION_SINGLE or %GTK_SELECTION_BROWSE will clear all previously selected markers.
a #GtkSelectionMode value
See Implementation
Sets the selection mode of the layer.
NOTE: changing selection mode to %GTK_SELECTION_NONE, %GTK_SELECTION_SINGLE or %GTK_SELECTION_BROWSE will clear all previously selected markers.