Closed
Description
Bug report
Bug summary
Gtk3 overlay widgets like popover is very slow when they placed over plot.
Code for reproduction
import gi # isort:skip
gi.require_version('Gtk', '3.0') # NOQA: E402
from gi.repository import Gtk # isort:skip
import numpy as np
from matplotlib.backends.backend_gtk3agg import \
FigureCanvasGTK3Agg as FigureCanvas
from matplotlib.figure import Figure
win = Gtk.Window()
box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
button = Gtk.Button(label='Push me')
box.pack_start(button, False, True, 0)
popover = Gtk.Popover(relative_to=button)
popbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
pixbuf = Gtk.IconTheme.get_default().load_icon('gtk-about', 256, 0)
icon = Gtk.Image.new_from_pixbuf(pixbuf)
popbox.pack_start(icon, False, True, 0)
label = Gtk.Label('Popover should be slow')
popbox.pack_start(label, False, True, 0)
popover.add(popbox)
popbox.show_all()
popbox.set_margin_top(16)
popbox.set_margin_bottom(16)
popbox.set_margin_left(16)
popbox.set_margin_right(16)
button.connect('clicked', lambda w: popover.popup())
fig = Figure()
ax = fig.add_subplot(111)
canvas = FigureCanvas(fig)
canvas.set_size_request(640, 489)
box.pack_start(canvas, True, True, 0)
arr = np.random.random((2, 2000, 2000))
ax.scatter(arr[0][0], arr[0][1], arr[1].flatten() * 40)
win.add(box)
win.connect('destroy', Gtk.main_quit)
win.show_all()
Gtk.main()Actual outcome
Click to "push me" button to show popover, animation will be slow.
cProfile shows that most of time python spends in redrawing entire plot during animation.
ncalls tottime percall cumtime percall filename:lineno(function)
43 30.353 0.706 30.359 0.706 collections.py:883(set_sizes)
1 11.329 11.329 50.730 50.730 Gtk.py:1608(main)
42 4.675 0.111 5.254 0.125 {method 'draw_path_collection' of 'matplotlib.backends._backend_agg.RendererAgg' objects}
1 0.245 0.245 0.245 0.245 {method 'random_sample' of 'mtrand.RandomState' objects}
90130 0.155 0.000 0.155 0.000 path.py:208(vertices)
87356 0.155 0.000 0.155 0.000 path.py:241(simplify_threshold)
35583/26326 0.155 0.000 0.295 0.000 artist.py:230(stale)
88197 0.150 0.000 0.150 0.000 path.py:222(codes)
88616 0.145 0.000 0.145 0.000 path.py:260(should_simplify)
Expected outcome
Plot should be cached somehow and won't be redrawn in this case.
Matplotlib version
- Operating system: Debian Sid
- Matplotlib version: 2.2.3
- Matplotlib backend: Gtk3Agg and Gtk3Cairo
- Python version: 3.6.6
- Gtk: 3.22,30
Matplotlib installed in virtual environment with pip.
I would like to fix this issue and make PR. Please point me any direction how this problem can be fixed.