自定义Boxstyle01

自定义Boxstyle01示例

  1. from matplotlib.path import Path
  4. def custom_box_style(x0, y0, width, height, mutation_size, mutation_aspect=1):
  5.     """
  6.     Given the location and size of the box, return the path of
  7.     the box around it.
  9.      - *x0*, *y0*, *width*, *height* : location and size of the box
  10.      - *mutation_size* : a reference scale for the mutation.
  11.      - *aspect_ratio* : aspect-ration for the mutation.
  12.     """
  14.     # note that we are ignoring mutation_aspect. This is okay in general.
  16.     # padding
  17.     mypad = 0.3
  18.     pad = mutation_size * mypad
  20.     # width and height with padding added.
  21.     width = width + 2 * pad
  22.     height = height + 2 * pad
  24.     # boundary of the padded box
  25.     x0, y0 = x0 - pad, y0 - pad
  26.     x1, y1 = x0 + width, y0 + height
  28.     cp = [(x0, y0),
  29.           (x1, y0), (x1, y1), (x0, y1),
  30.           (x0-pad, (y0+y1)/2.), (x0, y0),
  31.           (x0, y0)]
  33.     com = [Path.MOVETO,
  34.            Path.LINETO, Path.LINETO, Path.LINETO,
  35.            Path.LINETO, Path.LINETO,
  36.            Path.CLOSEPOLY]
  38.     path = Path(cp, com)
  40.     return path
  43. import matplotlib.pyplot as plt
  45. fig, ax = plt.subplots(figsize=(3, 3))
  46. ax.text(0.5, 0.5, "Test", size=30, va="center", ha="center",
  47.         bbox=dict(boxstyle=custom_box_style, alpha=0.2))
  49. plt.show()

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