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# Licensed under the terms of the MIT License
# see the Matplotlib licenses directory for a copy of the license
"""Module that provides a GUI-based editor for Matplotlib's figure options."""
from itertools import chain
from matplotlib import cbook, cm, colors as mcolors, markers, image as mimage
from matplotlib.backends.qt_compat import QtGui
from matplotlib.backends.qt_editor import _formlayout
from matplotlib.dates import DateConverter, num2date
LINESTYLES = {'-': 'Solid',
'--': 'Dashed',
'-.': 'DashDot',
':': 'Dotted',
'None': 'None',
}
DRAWSTYLES = {
'default': 'Default',
'steps-pre': 'Steps (Pre)', 'steps': 'Steps (Pre)',
'steps-mid': 'Steps (Mid)',
'steps-post': 'Steps (Post)'}
MARKERS = markers.MarkerStyle.markers
def figure_edit(axes, parent=None):
"""Edit matplotlib figure options"""
sep = (None, None) # separator
# Get / General
def convert_limits(lim, converter):
"""Convert axis limits for correct input editors."""
if isinstance(converter, DateConverter):
return map(num2date, lim)
# Cast to builtin floats as they have nicer reprs.
return map(float, lim)
axis_map = axes._axis_map
axis_limits = {
name: tuple(convert_limits(
getattr(axes, f'get_{name}lim')(), axis.get_converter()
))
for name, axis in axis_map.items()
}
general = [
('Title', axes.get_title()),
sep,
*chain.from_iterable([
(
(None, f"<b>{name.title()}-Axis</b>"),
('Min', axis_limits[name][0]),
('Max', axis_limits[name][1]),
('Label', axis.label.get_text()),
('Scale', [axis.get_scale(),
'linear', 'log', 'symlog', 'logit']),
sep,
)
for name, axis in axis_map.items()
]),
('(Re-)Generate automatic legend', False),
]
# Save the converter and unit data
axis_converter = {
name: axis.get_converter()
for name, axis in axis_map.items()
}
axis_units = {
name: axis.get_units()
for name, axis in axis_map.items()
}
# Get / Curves
labeled_lines = []
for line in axes.get_lines():
label = line.get_label()
if label == '_nolegend_':
continue
labeled_lines.append((label, line))
curves = []
def prepare_data(d, init):
"""
Prepare entry for FormLayout.
*d* is a mapping of shorthands to style names (a single style may
have multiple shorthands, in particular the shorthands `None`,
`"None"`, `"none"` and `""` are synonyms); *init* is one shorthand
of the initial style.
This function returns an list suitable for initializing a
FormLayout combobox, namely `[initial_name, (shorthand,
style_name), (shorthand, style_name), ...]`.
"""
if init not in d:
d = {**d, init: str(init)}
# Drop duplicate shorthands from dict (by overwriting them during
# the dict comprehension).
name2short = {name: short for short, name in d.items()}
# Convert back to {shorthand: name}.
short2name = {short: name for name, short in name2short.items()}
# Find the kept shorthand for the style specified by init.
canonical_init = name2short[d[init]]
# Sort by representation and prepend the initial value.
return ([canonical_init] +
sorted(short2name.items(),
key=lambda short_and_name: short_and_name[1]))
for label, line in labeled_lines:
color = mcolors.to_hex(
mcolors.to_rgba(line.get_color(), line.get_alpha()),
keep_alpha=True)
ec = mcolors.to_hex(
mcolors.to_rgba(line.get_markeredgecolor(), line.get_alpha()),
keep_alpha=True)
fc = mcolors.to_hex(
mcolors.to_rgba(line.get_markerfacecolor(), line.get_alpha()),
keep_alpha=True)
curvedata = [
('Label', label),
sep,
(None, '<b>Line</b>'),
('Line style', prepare_data(LINESTYLES, line.get_linestyle())),
('Draw style', prepare_data(DRAWSTYLES, line.get_drawstyle())),
('Width', line.get_linewidth()),
('Color (RGBA)', color),
sep,
(None, '<b>Marker</b>'),
('Style', prepare_data(MARKERS, line.get_marker())),
('Size', line.get_markersize()),
('Face color (RGBA)', fc),
('Edge color (RGBA)', ec)]
curves.append([curvedata, label, ""])
# Is there a curve displayed?
has_curve = bool(curves)
# Get ScalarMappables.
labeled_mappables = []
for mappable in [*axes.images, *axes.collections]:
label = mappable.get_label()
if label == '_nolegend_' or mappable.get_array() is None:
continue
labeled_mappables.append((label, mappable))
mappables = []
cmaps = [(cmap, name) for name, cmap in sorted(cm._colormaps.items())]
for label, mappable in labeled_mappables:
cmap = mappable.get_cmap()
if cmap.name not in cm._colormaps:
cmaps = [(cmap, cmap.name), *cmaps]
low, high = mappable.get_clim()
mappabledata = [
('Label', label),
('Colormap', [cmap.name] + cmaps),
('Min. value', low),
('Max. value', high),
]
if hasattr(mappable, "get_interpolation"): # Images.
interpolations = [
(name, name) for name in sorted(mimage.interpolations_names)]
mappabledata.append((
'Interpolation',
[mappable.get_interpolation(), *interpolations]))
interpolation_stages = ['data', 'rgba', 'auto']
mappabledata.append((
'Interpolation stage',
[mappable.get_interpolation_stage(), *interpolation_stages]))
mappables.append([mappabledata, label, ""])
# Is there a scalarmappable displayed?
has_sm = bool(mappables)
datalist = [(general, "Axes", "")]
if curves:
datalist.append((curves, "Curves", ""))
if mappables:
datalist.append((mappables, "Images, etc.", ""))
def apply_callback(data):
"""A callback to apply changes."""
orig_limits = {
name: getattr(axes, f"get_{name}lim")()
for name in axis_map
}
general = data.pop(0)
curves = data.pop(0) if has_curve else []
mappables = data.pop(0) if has_sm else []
if data:
raise ValueError("Unexpected field")
title = general.pop(0)
axes.set_title(title)
generate_legend = general.pop()
for i, (name, axis) in enumerate(axis_map.items()):
axis_min = general[4*i]
axis_max = general[4*i + 1]
axis_label = general[4*i + 2]
axis_scale = general[4*i + 3]
if axis.get_scale() != axis_scale:
getattr(axes, f"set_{name}scale")(axis_scale)
axis._set_lim(axis_min, axis_max, auto=False)
axis.set_label_text(axis_label)
# Restore the unit data
axis._set_converter(axis_converter[name])
axis.set_units(axis_units[name])
# Set / Curves
for index, curve in enumerate(curves):
line = labeled_lines[index][1]
(label, linestyle, drawstyle, linewidth, color, marker, markersize,
markerfacecolor, markeredgecolor) = curve
line.set_label(label)
line.set_linestyle(linestyle)
line.set_drawstyle(drawstyle)
line.set_linewidth(linewidth)
rgba = mcolors.to_rgba(color)
line.set_alpha(None)
line.set_color(rgba)
if marker != 'none':
line.set_marker(marker)
line.set_markersize(markersize)
line.set_markerfacecolor(markerfacecolor)
line.set_markeredgecolor(markeredgecolor)
# Set ScalarMappables.
for index, mappable_settings in enumerate(mappables):
mappable = labeled_mappables[index][1]
if len(mappable_settings) == 6:
label, cmap, low, high, interpolation, interpolation_stage = \
mappable_settings
mappable.set_interpolation(interpolation)
mappable.set_interpolation_stage(interpolation_stage)
elif len(mappable_settings) == 4:
label, cmap, low, high = mappable_settings
mappable.set_label(label)
mappable.set_cmap(cmap)
mappable.set_clim(*sorted([low, high]))
# re-generate legend, if checkbox is checked
if generate_legend:
draggable = None
ncols = 1
if axes.legend_ is not None:
old_legend = axes.get_legend()
draggable = old_legend._draggable is not None
ncols = old_legend._ncols
new_legend = axes.legend(ncols=ncols)
if new_legend:
new_legend.set_draggable(draggable)
# Redraw
figure = axes.get_figure()
figure.canvas.draw()
for name in axis_map:
if getattr(axes, f"get_{name}lim")() != orig_limits[name]:
figure.canvas.toolbar.push_current()
break
_formlayout.fedit(
datalist, title="Figure options", parent=parent,
icon=QtGui.QIcon(
str(cbook._get_data_path('images', 'qt4_editor_options.svg'))),
apply=apply_callback)
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