//! Returns the first layer selected or an empty handle if none are selected.
virtual synfig::Layer::Handle get_selected_layer()const=0;
//! Returns the first layer selected or an empty handle if none are selected.
virtual synfig::Layer::Handle get_selected_layer()const=0;
//! Sets which layers should be selected
virtual void set_selected_layers(const LayerList &layer_list)=0;
//! Sets which layers should be selected
virtual void set_selected_layers(const LayerList &layer_list)=0;
//! Returns a list of the currently selected childrens.
virtual ChildrenList get_selected_children()const=0;
//! Returns a list of the currently selected childrens.
virtual ChildrenList get_selected_children()const=0;
//! Returns the first children selected or an empty handle if none are selected.
virtual ChildrenList::value_type get_selected_child()const=0;
//! Returns the first children selected or an empty handle if none are selected.
virtual ChildrenList::value_type get_selected_child()const=0;
//! Sets which childrens should be selected
virtual void set_selected_children(const ChildrenList &children_list)=0;
//! Sets which childrens should be selected
virtual void set_selected_children(const ChildrenList &children_list)=0;
//! Returns a list of the currently selected layer parameters.
virtual LayerParamList get_selected_layer_parameters()const=0;
//! Returns a list of the currently selected layer parameters.
virtual LayerParamList get_selected_layer_parameters()const=0;
//! Returns the first layer parameter selected or an empty handle if none are selected.
virtual LayerParam get_selected_layer_parameter()const=0;
//! Returns the first layer parameter selected or an empty handle if none are selected.
virtual LayerParam get_selected_layer_parameter()const=0;
//! Sets which layer parameters should be selected
virtual void set_selected_layer_parameters(const LayerParamList &layer_param_list)=0;
//! Sets which layer parameters should be selected
virtual void set_selected_layer_parameters(const LayerParamList &layer_param_list)=0;