import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk


class GtkSelectionList(Gtk.ListBox):

    def __init__(self, *args, **kwds):
        super().__init__(*args, **kwds)
        self.connect("row-selected", self.on_selection)
        self.selections={}
        self._on_selected=None
        self.current_selection_name=""

    def init(self):
        ch=self.get_children()
        for c in ch: super().remove(c)
        self.current_selection_name=""

    def set_on_selected(self, a):
        self._on_selected=a

    def rename(self, old, new):
        self.selections[new]=self.selections[old]
        del self.selections[old]
        self.selections[new][0].set_text(new)

    def append(self, name, sel):
        label = Gtk.Label.new(name)
        label.set_alignment(0,0)
        self.add(label)
        label.show_all()
        self.selections[name]=(label, sel)

    def remove(self, name):
        if name in self.selections:
            lbl = self.selections[name][0]
            for i in range(len(self.selections)):
                row = self.get_row_at_index(i)
                label = row.get_child()
                if label==lbl:
                    super().remove(row)
            del self.selections[name]

    def on_selection(self, obj, c):
        for k in self.selections:
            if c.get_child()==self.selections[k][0]:
                self.current_selection_name=k
                self._on_selected(k, self.selections[k][1])