In the current Python 3.7.0b1, on macOS 10.12.6 Sierra (also on 10.11 El Capitan), which seems to include a newer Tcl/tk version, there seems to be some visual glitches when using the place() geometry manager to animate a ttk.Frame containing ScrolledText widgets. These issues do not happen when running the same code on current Python 3.6.

Thanks in advance,

With best regards,
Victor Domingos



My current version:

Python 3.7.0b1 (v3.7.0b1:9561d7f501, Jan 30 2018, 19:10:11) 
[Clang 6.0 (clang-600.0.57)] on darwin

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Here is an excerpt of my code (animated placement of the container frame):


    def show_entryform(self, *event):
        if not self.is_entryform_visible:
            self.is_entryform_visible = True
            self.btn_add.configure(state="disabled")
            # Formulário de entrada de dados (fundo da janela)
            self.my_statusbar.lift()

            if SLOW_MACHINE:
                self.entryframe.place(
                    in_=self.my_statusbar, relx=1, y=0, anchor="se", relwidth=1, bordermode="outside")
            else:
                for y in range(-30, -12, 6):
                    self.entryframe.update()
                    y = y**2
                    self.entryframe.place(
                        in_=self.my_statusbar, relx=1, y=y, anchor="se", relwidth=1, bordermode="outside")
                for y in range(-12, -3, 3):
                    self.entryframe.update()
                    y = y**2
                    self.entryframe.place(
                        in_=self.my_statusbar, relx=1, y=y, anchor="se", relwidth=1, bordermode="outside")
                for y in range(-3, 0, 1):
                    self.entryframe.update()
                    y = y**2
                    self.entryframe.place(
                        in_=self.my_statusbar, relx=1, y=y, anchor="se", relwidth=1, bordermode="outside")

            self.entryframe.lift()


-----------

And the base class definition for the problematic widgets:


class LabelText(ttk.Frame):
    """
    Generate an empty tkinter.scrolledtext form field with a text label above it.
    """

    def __init__(self, parent, label, style=None, width=0, height=0):
        ttk.Frame.__init__(self, parent)
        if style:
            self.label = ttk.Label(self, text=label, style=style, anchor="w")
        else:
            self.label = ttk.Label(self, text=label, anchor="w")

        self.scrolledtext = ScrolledText(self, font=("Helvetica-Neue", 12),
                                         highlightcolor="LightSteelBlue2",
                                         wrap='word',
                                         width=width,
                                         height=height)

        self.label.pack(side="top", fill="x", expand=False)
        self.scrolledtext.pack(side="top", fill="both", expand=True)

Tkinter is just a wrapper around Tcl/Tk. It is not responsible for visualization. Please report your issue on the Tk bug tracker https://core.tcl.tk/tk/reportlist.

Victor, FYI, 3.7.0b2 has just been released and the macOS 10.9+ installer contains an updated version of Tcl/Tk (8.6.7 -> 8.6.8).  According to the Tk change log, there were a number of macOS related fixes that went in to 8.6.8. Perhaps some of the glitches you were seeing have been fixed?  If not, as Serhiy points out, it's best to report the issue to the Tk project especially if it can be easily reproduced without using Python with, like with the Tcl wish shell.  Good luck!

The new beta (Python 3.7.0b2 with Tcl/tk 8.6.8) seems to have that issue solved. Nice! :)