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Update Axes showcase in "Embedding in Tk" example #20218

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Merged
merged 8 commits into from
May 19, 2021
+23 −4
Merged

Update Axes showcase in "Embedding in Tk" example #20218

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f50f3c8
Update plot in tk-embedding example
kopytjuk May 13, 2021
c7f75ca
Flake 8 fix
kopytjuk May 13, 2021
fddf7b3
Change from button to slider
kopytjuk May 14, 2021
a9755c1
Fix linting.
kopytjuk May 14, 2021
583beab
Update data via set_data().
kopytjuk May 18, 2021
dd88d6f
Labels to physical units.
kopytjuk May 18, 2021
a669956
Update examples/user_interfaces/embedding_in_tk_sgskip.py
kopytjuk May 19, 2021
4e012d8
Update examples/user_interfaces/embedding_in_tk_sgskip.py
kopytjuk May 19, 2021
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27 changes: 23 additions & 4 deletions examples/user_interfaces/embedding_in_tk_sgskip.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,10 @@

fig = Figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot().plot(t, 2 * np.sin(2 * np.pi * t))
ax = fig.add_subplot()
line, = ax.plot(t, 2 * np.sin(2 * np.pi * t))
ax.set_xlabel("time [s]")
ax.set_ylabel("f(t)")

canvas = FigureCanvasTkAgg(fig, master=root) # A tk.DrawingArea.
canvas.draw()
Expand All @@ -30,18 +33,34 @@
toolbar = NavigationToolbar2Tk(canvas, root, pack_toolbar=False)
toolbar.update()


canvas.mpl_connect(
"key_press_event", lambda event: print(f"you pressed {event.key}"))
canvas.mpl_connect("key_press_event", key_press_handler)

button = tkinter.Button(master=root, text="Quit", command=root.quit)
button_quit = tkinter.Button(master=root, text="Quit", command=root.quit)


def update_frequency(new_val):
# retrieve frequency
f = float(new_val)

# update data
y = 2 * np.sin(2 * np.pi * f * t)
line.set_data(t, y)

# required to update canvas and attached toolbar!
canvas.draw()


slider_update = tkinter.Scale(root, from_=1, to=5, orient=tkinter.HORIZONTAL,
command=update_frequency, label="Frequency [Hz]")

# Packing order is important. Widgets are processed sequentially and if there
# is no space left, because the window is too small, they are not displayed.
# The canvas is rather flexible in its size, so we pack it last which makes
# sure the UI controls are displayed as long as possible.
button.pack(side=tkinter.BOTTOM)
button_quit.pack(side=tkinter.BOTTOM)
slider_update.pack(side=tkinter.BOTTOM)
toolbar.pack(side=tkinter.BOTTOM, fill=tkinter.X)
canvas.get_tk_widget().pack(side=tkinter.TOP, fill=tkinter.BOTH, expand=1)

Expand Down