如何以编程方式设置ttk日历

Question

我在我的应用程序中使用此ttk日历.

我想要做的是使用datetime.date实例设置日历,以便在日历出现时突出显示指定的日期.

我以为我可以通过_show_selection手动text和bboxargs 来完成这个方法.为了测试这个想法,我将这一行放在__init__方法的末尾:

self._show_selection('%02d'%16,(42,61,41,20))

我希望它能突出本月16日(5月),但事实并非如此.

我print text, bbox在_pressed方法中运行了args .

如果有人能够对此有所了解,我将非常感激.

Answer 1

在 __setup_selection() 中，有一个对配置事件的绑定。据推测，它是为了在调整日历大小时删除“选择画布”。但是，当日历首次映射到屏幕时，配置事件也会触发，因此您预先选择的日期在您看到它之前就消失了。

set_day（如下）允许您以编程方式选择一天。如果小部件尚不可见，它会通过重新调度自身来回避第一个配置事件的问题。

日历更改：

def __setup_selection(self, sel_bg, sel_fg):
    self._font = font.Font()
    self._canvas = canvas = tkinter.Canvas(self._calendar,
        background=sel_bg, borderwidth=0, highlightthickness=0)
    canvas.text = canvas.create_text(0, 0, fill=sel_fg, anchor='w')

    canvas.bind('<ButtonPress-1>', lambda evt: canvas.place_forget())
    #self._calendar.bind('<Configure>', lambda evt: canvas.place_forget())
    self._calendar.bind('<Configure>', self.on_configure)        
    self._calendar.bind('<ButtonPress-1>', self._pressed)

def on_configure(self, event):
    self._canvas.place_forget()
    if self._selection is not None:
        text, iid, column = self._selection
        bbox = self._calendar.bbox(iid, column)
        self._show_selection(text, bbox)

def _prev_month(self):
    """Updated calendar to show the previous month."""
    self._canvas.place_forget()
    self._selection = None #
    self._date = self._date - self.timedelta(days=1)
    self._date = self.datetime(self._date.year, self._date.month, 1)
    self._build_calendar() # reconstuct calendar

def _next_month(self):
    """Update calendar to show the next month."""
    self._canvas.place_forget()
    self._selection = None #
    year, month = self._date.year, self._date.month
    self._date = self._date + self.timedelta(
        days=calendar.monthrange(year, month)[1] + 1)
    self._date = self.datetime(self._date.year, self._date.month, 1)
    self._build_calendar() # reconstruct calendar

def set_day(self, day):
    w = self._calendar
    if not w.winfo_viewable():
        w.after(200, self.set_day, day)
        return

    text = '%02d' % day
    column = None
    for iid in self._items:
        rowvals = w.item(iid, 'values')
        try:
            column = rowvals.index(text)
        except ValueError as err:
            pass
        else:
            item = iid
            bbox = w.bbox(iid, column)
            break

    if column is not None:
        self._selection = (text, item, column)
        self._show_selection(text, bbox) 

#test
def test():
    import sys
    root = tkinter.Tk()
    root.title('Ttk Calendar')
    ttkcal = Calendar(firstweekday=calendar.SUNDAY)
    ttkcal.pack(expand=1, fill='both')

    if 'win' not in sys.platform:
        style = ttk.Style()
        style.theme_use('clam')

    ttkcal.set_day(16) #
    root.mainloop()