[New-bugs-announce] [issue32864] Visual glitches when animating ScrolledText instances using place geometry manager

[Victor Domingos]

New submission from Victor Domingos <editor.arcosonline at gmail.com>:

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

--------

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)

----------
components: Tkinter, macOS
files: issues.jpg
messages: 312281
nosy: Victor Domingos, gpolo, ned.deily, ronaldoussoren, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Visual glitches when animating ScrolledText instances using place geometry manager
type: behavior
versions: Python 3.7, Python 3.8
Added file: https://bugs.python.org/file47450/issues.jpg

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32864>
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