TreeView와 TreeStore(Python)

예제 결과를 만드는 코드

from gi.repository import Gtk
from gi.repository import Pango
import sys

books = [["Tolstoy, Leo", ["War and Peace", True], ["Anna Karenina", False]],
         ["Shakespeare, William", ["Hamlet", False],
             ["Macbeth", True], ["Othello", False]],
         ["Tolkien, J.R.R.", ["The Lord of the Rings", False]]]


class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):
        Gtk.Window.__init__(self, title="Library", application=app)
        self.set_default_size(250, 100)
        self.set_border_width(10)

        # the data are stored in the model
        # create a treestore with two columns
        self.store = Gtk.TreeStore(str, bool)
        # fill in the model
        for i in range(len(books)):
            # the iter piter is returned when appending the author in the first column
            # and False in the second
            piter = self.store.append(None, [books[i][0], False])
            # append the books and the associated boolean value as children of
            # the author
            j = 1
            while j < len(books[i]):
                self.store.append(piter, books[i][j])
                j += 1

        # the treeview shows the model
        # create a treeview on the model self.store
        view = Gtk.TreeView()
        view.set_model(self.store)

        # the cellrenderer for the first column - text
        renderer_books = Gtk.CellRendererText()
        # the first column is created
        column_books = Gtk.TreeViewColumn("Books", renderer_books, text=0)
        # and it is appended to the treeview
        view.append_column(column_books)

        # the cellrenderer for the second column - boolean rendered as a toggle
        renderer_in_out = Gtk.CellRendererToggle()
        # the second column is created
        column_in_out = Gtk.TreeViewColumn("Out?", renderer_in_out, active=1)
        # and it is appended to the treeview
        view.append_column(column_in_out)
        # connect the cellrenderertoggle with a callback function
        renderer_in_out.connect("toggled", self.on_toggled)

        # add the treeview to the window
        self.add(view)

    # callback function for the signal emitted by the cellrenderertoggle
    def on_toggled(self, widget, path):
        # the boolean value of the selected row
        current_value = self.store[path][1]
        # change the boolean value of the selected row in the model
        self.store[path][1] = not current_value
        # new current value!
        current_value = not current_value
        # if length of the path is 1 (that is, if we are selecting an author)
        if len(path) == 1:
            # get the iter associated with the path
            piter = self.store.get_iter(path)
            # get the iter associated with its first child
            citer = self.store.iter_children(piter)
            # while there are children, change the state of their boolean value
            # to the value of the author
            while citer is not None:
                self.store[citer][1] = current_value
                citer = self.store.iter_next(citer)
        # if the length of the path is not 1 (that is, if we are selecting a
        # book)
        elif len(path) != 1:
            # get the first child of the parent of the book (the first book of
            # the author)
            citer = self.store.get_iter(path)
            piter = self.store.iter_parent(citer)
            citer = self.store.iter_children(piter)
            # check if all the children are selected
            all_selected = True
            while citer is not None:
                if self.store[citer][1] == False:
                    all_selected = False
                    break
                citer = self.store.iter_next(citer)
            # if they do, the author as well is selected; otherwise it is not
            self.store[piter][1] = all_selected


class MyApplication(Gtk.Application):

    def __init__(self):
        Gtk.Application.__init__(self)

    def do_activate(self):
        win = MyWindow(self)
        win.show_all()

    def do_startup(self):
        Gtk.Application.do_startup(self)

app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)

TreeView 위젯에 쓸만한 메서드

TreeView 위젯은 Model/View/Controller 방식으로 설계했습니다. Model은 데이터를, View는 바뀐 내용 알림을 받은 후의 모델의 내용을, 마지막으로 Controller는 모델의 상태를 바꾸고 뷰에게 바뀐 모델의 상태를 알리는 코드를 담습니다. 자세한 내용과 TreeModel에 대한 쓸만한 메서드 목록을 보시려면 를 참고하십시오.

48번째 줄에서 "toggled" 시그널은 widget.connect(signal, callback function) 함수로 on_toggled() 콜백 함수에 연결했습니다. 더 자세한 설명은 를 참조하십시오.