<p>经过多次尝试,这是我能想到的最好的:</p>
<pre><code>from matplotlib.lines import Line2D
from matplotlib.gridspec import GridSpec
from enum import Enum
class Location(Enum):
EastOutside = 1
WestOutside = 2
NorthOutside = 3
SouthOutside = 4
class Legend:
def __init__(self, figure, plotAxes, location: Location):
self.figure = figure
self.plotAxes = plotAxes
self.location = location
# Create a separate subplot for the legend. Actual location doesn't matter - will be modified anyway.
self.legendAxes = figure.add_subplot(1, 2, 1)
self.legendAxes.clear() # remove old lines
self.legendAxes.set_axis_off()
# Add all lines from the plot to the legend subplot
for line in plotAxes.get_lines():
legendLine = Line2D([], [])
legendLine.update_from(line)
self.legendAxes.add_line(legendLine)
if self.location == Location.EastOutside:
self.legend = self.legendAxes.legend(loc = "center left")
elif self.location == Location.WestOutside:
self.legend = self.legendAxes.legend(loc = "center right")
elif self.location == Location.NorthOutside:
self.legend = self.legendAxes.legend(loc = "lower center")
elif self.location == Location.SouthOutside:
self.legend = self.legendAxes.legend(loc = "upper center")
else:
raise Exception("Unknown legend location.")
self.UpdateSize()
# Recalculate legend size if the size changes
figure.canvas.mpl_connect('resize_event', lambda event: self.UpdateSize())
def UpdateSize(self):
self.figure.canvas.draw() # draw everything once in order to get correct legend size
# Extract legend size in percentage of the figure width
legendSize = self.legend.get_window_extent().inverse_transformed(self.figure.transFigure)
legendWidth = legendSize.width
legendHeight = legendSize.height
# Update subplot such that it is only as large as the legend
if self.location == Location.EastOutside:
gridspec = GridSpec(1, 2, width_ratios = [1 - legendWidth, legendWidth])
legendLocation = 1
plotLocation = 0
elif self.location == Location.WestOutside:
gridspec = GridSpec(1, 2, width_ratios = [legendWidth, 1 - legendWidth])
legendLocation = 0
plotLocation = 1
elif self.location == Location.NorthOutside:
gridspec = GridSpec(2, 1, height_ratios = [legendHeight, 1 - legendHeight])
legendLocation = 0
plotLocation = 1
elif self.location == Location.SouthOutside:
gridspec = GridSpec(2, 1, height_ratios = [1 - legendHeight, legendHeight])
legendLocation = 1
plotLocation = 0
else:
raise Exception("Unknown legend location.")
self.legendAxes.set_position(gridspec[legendLocation].get_position(self.figure))
self.legendAxes.set_subplotspec(gridspec[legendLocation]) # to make figure.tight_layout() work if that's desired
self.plotAxes.set_position(gridspec[plotLocation].get_position(self.figure))
self.plotAxes.set_subplotspec(gridspec[plotLocation]) # to make figure.tight_layout() work if that's desired
</code></pre>
<p>在我迄今为止测试过的案例中,这个传说或多或少是好的。用法是</p>
^{pr2}$
<p>让我问一个问题,我已经在一个评论。。。对于matplotlib开发人员,我该如何建议将其作为一个附加特性呢?(不是我的黑客,而是一种在人物之外拥有传奇的本土方式)</p>