El 29 de abril de 2019 8:16:50 AM GMT-03:00, Sibylle Koczian
<nulla.epist...@web.de> escribió:
>Hello,
>
>the following script shows a Treeview with names and country codes of
>some towns in Germany. Towns with country code "HE" or "BY" should be
>shown with coloured background, in the case of "BY" additionally with
>white text.
>
>This works using Python 3.5 or 3.6. I seem to remember that it worked
>with earlier versions of Python 3.7, but that's not certain. Using
>Python 3.7.3 all the entries have white background and black text.
>Opening an entry with Enter or double click shows the name of the town
>in the Entry field, together with the country name, if the row has the
>tag for HE or BY. So the entries have the tags they should, but the
>color doesn't change.
>
>Changing the font of an entry using tags does work.
>
>All of these Python versions come with tcl/tk version 8.6, but I don't
>know the patch numbers, they probably changed. The official
>documentation for tkinter and for tcl/tk seems to show that the script
>is correct. I can see no hint of recent changes in the use of tags,
>tag_configure and the options usable with tags.
>
>Here is the script:
>
>############################################################################
>
>#!/usr/bin/env python3
># treeview_forum.py
>
>"""Treeview-Komponente erforschen"""
>
>import tkinter as tk
>from tkinter import ttk
>
>CITIES = [
> "1,Frankfurt,HE",
> "2,Augsburg,BY",
> "3,Kiel,SH",
> "4,Flensburg,SH",
> "5,Stuttgart,BW"
> ]
>
>
>class TreeFrame(ttk.Frame):
>
> column_defs = {
> "#0": {"label": "IDN", "width": 40, "anchor": tk.E},
> "Name": {"label": "Name", "minwidth": 200, "stretch": True},
> "Country": {"label": "CC", "width": 80}
> }
> default_width = 100
> default_minwidth = 10
> default_anchor = tk.W
>
> def __init__(self, parent, export_city, *args, **kwargs):
> super().__init__(parent, *args, **kwargs)
> self.columnconfigure(0, weight=1)
> self.rowconfigure(0, weight=1)
> self.export_namecolumn = export_city
> self.treeview = ttk.Treeview(self,
> columns=["Name", "Country"],
> selectmode='browse')
> for (name, definition) in self.column_defs.items():
> label = definition.get('label', '')
> anchor = definition.get('anchor', self.default_anchor)
> minwidth = definition.get('minwidth', self.default_minwidth)
> width = definition.get('width', self.default_width)
> stretch = definition.get('stretch', False)
> self.treeview.heading(name, text=label, anchor=anchor)
> self.treeview.column(name, anchor=anchor, minwidth=minwidth,
> width=width, stretch=stretch)
> self.treeview.tag_configure('hessen', background='lightgreen')
> self.treeview.tag_configure('bayern', background='darkgray',
> foreground='white')
> self.treeview.bind('<<TreeviewOpen>>', self.on_open_record)
> self.scrollbar = ttk.Scrollbar(self, orient=tk.VERTICAL,
> command=self.treeview.yview)
> self.treeview.configure(yscrollcommand=self.scrollbar.set)
> self.treeview.grid(row=0, column=0, sticky='NSEW')
> self.scrollbar.grid(row=0, column=1, sticky='NSW')
>
> def on_open_record(self, *args):
> selected_item = self.treeview.selection()[0]
> selected_name = self.treeview.set(selected_item, 0)
> in_hessen = (" (Hessen)"
> if self.treeview.tag_has('hessen', selected_item)
>else "")
> in_bayern = (" (Bayern)"
> if self.treeview.tag_has('bayern', selected_item)
>else "")
> msg = "{0}{1}{2}".format(selected_name, in_hessen, in_bayern)
> self.export_namecolumn(msg)
>
> def populate(self, rows):
> """Clear the treeview & write the supplied data rows to it."""
> for row in self.treeview.get_children():
> self.treeview.delete(row)
> for rec in rows:
> idstr = str(rec['ID'])
> values = [rec['Name'], rec['CC']]
> if rec['CC'] == 'HE':
> cc = 'hessen'
> elif rec['CC'] == 'BY':
> cc = 'bayern'
> else:
> cc = ''
> self.treeview.insert('', 'end', iid=idstr, text=idstr,
> values=values, tags=(cc,))
> if rows:
> self.treeview.focus_set()
> first = self.treeview.identify_row(0)
> self.treeview.selection_set(first)
> self.treeview.focus(first)
>
>
>class RecordFrame(ttk.Frame):
>
> def __init__(self, parent):
> super().__init__(parent)
> self.columnconfigure(0, weight=1)
> self.rowconfigure(1, weight=1)
> ttk.Label(self, text="Ausgewählt:").grid(row=0, column=0)
> self.entryvar = tk.StringVar()
> ttk.Entry(self, textvariable=self.entryvar).grid(row=1, column=0,
> sticky='EW')
>
> def set(self, value):
> self.entryvar.set(value)
>
> def get(self):
> return self.entryvar.get()
>
>class Application(tk.Tk):
>
> def __init__(self, *args, **kwargs):
> super().__init__(*args, **kwargs)
> self.geometry("360x500")
> self.columnconfigure(0, weight=1)
> self.rowconfigure(0, weight=1)
> self.recordlist = TreeFrame(self, self.show_city)
> self.recordlist.grid(row=0, padx=10, pady=10, sticky="NSEW")
> self.dataframe = RecordFrame(self)
> self.dataframe.grid(row=1, padx=10, pady=10, sticky="NSEW")
> self.recordlist.populate(self.get_all_cities(CITIES))
>
> def get_all_cities(self, citynames):
> fieldnames = ("ID", "Name", "CC")
> allcities = [dict(zip(fieldnames, row.split(','))) for row in
>citynames]
> return allcities
>
> def show_city(self, city):
> self.dataframe.set(city)
>
>
>root = Application()
>root.mainloop()
>
Maybe you hit this bug?
http://core.tcl.tk/tk/tktview?name=509cafafae
--
Emiliano
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