text-alignments.py

# -----------------------------------------------------------------------------
# Matplotlib cheat sheet
# Released under the BSD License
# -----------------------------------------------------------------------------
importpathlib

importnumpyasnp
importmatplotlib.pyplotasplt


ROOT_DIR=pathlib.Path(__file__).parent.parent

dpi=100
fig=plt.figure(figsize=(4.25, 1.5), dpi=dpi)
ax=fig.add_axes([0, 0, 1, 1], frameon=False,
xlim=(0, 4.25), ylim=(0, 1.5), xticks=[], yticks=[])

fontsize=48
renderer=fig.canvas.get_renderer()
horizontalalignment="left"
verticalalignment="center"
position= (0.25, 1.5/2)
color="0.25"

# Compute vertical and horizontal alignment offsets
text=ax.text(0, 0, "Matplotlib", fontsize=fontsize)
yoffset= {}
foralignmentin ["top", "center", "baseline", "bottom"]:
text.set_verticalalignment(alignment)
y=text.get_window_extent(renderer).y0/dpi
yoffset[alignment] =y

xoffset= {}
foralignmentin ["left", "center", "right"]:
text.set_horizontalalignment(alignment)
x=text.get_window_extent(renderer).x0/dpi
xoffset[alignment] =x

# Actual positioning of the text
text.set_horizontalalignment(horizontalalignment)
text.set_verticalalignment(verticalalignment)
text.set_position(position)


forname, yinyoffset.items():
y=position[1] -y+yoffset[verticalalignment]
plt.plot([0.1, 3.75], [y, y], linewidth=0.5, color=color)
plt.text(3.75, y, " "+name, color=color,
ha="left", va="center", size="x-small")

forname, xinxoffset.items():
x=position[0] -x+xoffset[horizontalalignment]
plt.plot([x, x], [0.25, 1.25], linewidth=0.5, color=color)
plt.text(x, 0.24, name, color=color,
ha="center", va="top", size="x-small")

P= []
forxinxoffset.values():
x=position[0] -x+xoffset[horizontalalignment]
foryinyoffset.values():
y=position[1] -y+yoffset[verticalalignment]
P.append((x, y))
P=np.array(P)

ax.scatter(P[:, 0], P[:, 1], s=10, zorder=10,
facecolor="white", edgecolor=color, linewidth=0.75)

epsilon=0.05
plt.text(P[3, 0]+epsilon, P[3, 1]-epsilon, "(0,0)",
color=color, ha="left", va="top", size="x-small")
plt.text(P[8, 0]-epsilon, P[8, 1]+epsilon, "(1,1)",
color=color, ha="right", va="bottom", size="x-small")

fig.savefig(ROOT_DIR/"figures/text-alignments.pdf")
# plt.show()