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import math |
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import matplotlib.lines as mlines |
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import matplotlib.text as mtext |
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import matplotlib.transforms as mtransforms |
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class LabeledLine(mlines.Line2D): |
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"""Draw a line with label in the middle on top of the line |
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""" |
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def __init__(self, *args, **kwargs): |
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self.text = mtext.Text(0, 0, '', verticalalignment='center', horizontalalignment='center', |
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color='b') |
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super().__init__(*args, **kwargs) |
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self.text.set_text(self.get_label()) |
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self.text.set_zorder(self.get_zorder() + 1) |
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self.text.set_alpha(self.get_alpha()) |
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def set_figure(self, figure): |
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self.text.set_figure(figure) |
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super().set_figure(figure) |
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def set_axes(self, axes): |
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self.text.set_axes(axes) |
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super().set_axes(axes) |
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def set_transform(self, transform): |
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texttrans = transform |
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self.text.set_transform(texttrans) |
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super().set_transform(transform) |
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def set_data(self, x, y): |
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if len(x) > 1: |
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text_x = .5 * (x[0] + x[1]) |
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text_y = .5 * (y[0] + y[1]) |
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text_rot = - math.degrees(math.atan((y[1] - y[0]) / (x[1] - x[0]))) |
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self.text.set_position((text_x, text_y)) |
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self.text.set_rotation(text_rot) |
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super().set_data(x, y) |
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def draw(self, renderer): |
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# draw my label at the end of the line with 2 pixel offset |
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super().draw(renderer) |
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self.text.draw(renderer) |
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TinghuiWang /
pyActLearn
