def _nucleotide_key_text_callback(patch: patches.Wedge,
nucleotide_body_patch: patches.Circle,
text_object, x_border=0.2, y_border=0.1):
# assumes that the coordinates are equal scaled in the view
radius = nucleotide_body_patch.radius
radius_with_width = radius + patch.width
radius_with_half_width = radius + patch.width / 2
initial_text_rotation = text_object.get_rotation()
text_object.set_rotation(0)
body_patch_window_extent = nucleotide_body_patch.get_window_extent()
scale_pixel_to_units = body_patch_window_extent.width / 2 / radius
wedge_height_pixel = scale_pixel_to_units * patch.width
wedge_width = (2 * np.pi * radius_with_half_width *
np.abs(patch.theta2 - patch.theta1) / 360)
text_width_max = min(
wedge_width,
2 * (radius_with_width ** 2 - radius_with_half_width ** 2) ** 0.5)
text_width_max_pixel = scale_pixel_to_units * text_width_max
_scale_font_size(text_object, text_width_max_pixel,
wedge_height_pixel, x_border, y_border)
text_object.set_rotation(initial_text_rotation)
def _nucleotide_name_callback(patch: patches.Circle,
text_object, x_border=0.1, y_border=0.1):
patch_window_extent = patch.get_window_extent()
_scale_font_size(text_object, patch_window_extent.width,
patch_window_extent.height, x_border, y_border)