Python-сообщество

Доброго всем времени суток!
есть следущий класс, сделанный по аналогии с treeview_multicolumn.py:

def sortby(tree, col, descending):
    """Sort tree contents when a column is clicked on."""
    # grab values to sort
    data = [(tree.set(child, col), child) for child in tree.get_children('')]

    # reorder data
    data.sort(reverse=descending)
    for indx, item in enumerate(data):
        tree.move(item[1], '', indx)

    # switch the heading so that it will sort in the opposite direction
    tree.heading(col,
        command=lambda col=col: sortby(tree, col, int(not descending)))



class MyMulticolumn(Frame):
    def __init__(self, master=None, mdata=(), height=10):
        Frame.__init__(self, master)
        self.pack({'padx':5, 'pady':5})
        self.tree_columns=mdata[0]
        self.tree_data=mdata[1]
	self.createWidgets(height)
        self._build_tree(self.tree_columns,self.tree_data)

    def createWidgets(self, height):
	# XXX Sounds like a good support class would be one for constructing
	#     a treeview with scrollbars.
	self.tree = ttk.Treeview(self, columns=self.tree_columns, show="headings")
	vsb = ttk.Scrollbar(self, orient="vertical", command=self.tree.yview)
	hsb = ttk.Scrollbar(self, orient="horizontal", command=self.tree.xview)
	self.tree.configure(height=height)
	self.tree.configure(yscrollcommand=vsb.set, xscrollcommand=hsb.set)
	self.tree.grid(column=0, row=0, sticky='nsew')
	vsb.grid(column=1, row=0, sticky='ns')
	hsb.grid(column=0, row=1, sticky='ew')

    def _build_tree(self, tree_columns, tree_data):
        for i in self.tree.get_children(): self.tree.delete(i)
        for col in self.tree_columns:
            self.tree.heading(col, text=col.title(),
                command=lambda c=col: sortby(self.tree, c, 0))
            # XXX tkFont.Font().measure expected args are incorrect according
            #     to the Tk docs
            self.tree.column(col, width=(tkFont.Font().measure(col.title())))

        for item in self.tree_data:
            self.tree.insert('', 'end', values=item)

            # adjust columns lenghts if necessary
            for indx, val in enumerate(item):
                ilen = int(tkFont.Font().measure(val)*0.8)
                if self.tree.column(self.tree_columns[indx], width=None) < ilen:
                    self.tree.column(self.tree_columns[indx], width=ilen)

    def _get_selected(self):
        '''returns selected items'''
        a=[]
        for i in self.tree.selection(): a.append((self.tree.item(i)['values']))
        return a

Отредактировано Dr.Livsi (Апрель 25, 2012 13:58:38)

Dr.Livsi
Доброго всем времени суток!
есть следущий класс, сделанный по аналогии с treeview_multicolumn.py:

def sortby(tree, col, descending):
    """Sort tree contents when a column is clicked on."""
    # grab values to sort
    data = [(tree.set(child, col), child) for child in tree.get_children('')]

    # reorder data
    data.sort(reverse=descending)
    for indx, item in enumerate(data):
        tree.move(item[1], '', indx)

    # switch the heading so that it will sort in the opposite direction
    tree.heading(col,
        command=lambda col=col: sortby(tree, col, int(not descending)))



class MyMulticolumn(Frame):
    def __init__(self, master=None, mdata=(), height=10):
        Frame.__init__(self, master)
        self.pack({'padx':5, 'pady':5})
        self.tree_columns=mdata[0]
        self.tree_data=mdata[1]
	self.createWidgets(height)
        self._build_tree(self.tree_columns,self.tree_data)

    def createWidgets(self, height):
	# XXX Sounds like a good support class would be one for constructing
	#     a treeview with scrollbars.
	self.tree = ttk.Treeview(self, columns=self.tree_columns, show="headings")
	vsb = ttk.Scrollbar(self, orient="vertical", command=self.tree.yview)
	hsb = ttk.Scrollbar(self, orient="horizontal", command=self.tree.xview)
	self.tree.configure(height=height)
	self.tree.configure(yscrollcommand=vsb.set, xscrollcommand=hsb.set)
	self.tree.grid(column=0, row=0, sticky='nsew')
	vsb.grid(column=1, row=0, sticky='ns')
	hsb.grid(column=0, row=1, sticky='ew')

    def _build_tree(self, tree_columns, tree_data):
        for i in self.tree.get_children(): self.tree.delete(i)
        for col in self.tree_columns:
            self.tree.heading(col, text=col.title(),
                command=lambda c=col: sortby(self.tree, c, 0))
            # XXX tkFont.Font().measure expected args are incorrect according
            #     to the Tk docs
            self.tree.column(col, width=(tkFont.Font().measure(col.title())))

        for item in self.tree_data:
            self.tree.insert('', 'end', values=item)

            # adjust columns lenghts if necessary
            for indx, val in enumerate(item):
                ilen = int(tkFont.Font().measure(val)*0.8)
                if self.tree.column(self.tree_columns[indx], width=None) < ilen:
                    self.tree.column(self.tree_columns[indx], width=ilen)

    def _get_selected(self):
        '''returns selected items'''
        a=[]
        for i in self.tree.selection(): a.append((self.tree.item(i)['values']))
        return a

Проблема в том, что когда меняю данные в списке (добавляю/удаляю/корректирую) при вызове метода MyMulticolumn._build_tree(тежеСтолбцы, новыеДанные) перерисовка содержимого не происходит.
С чем это может быть связано?