Add example of semantic plot to gallery

docs/examples/legend_types/01_semantic_legends.py

@@ -0,0 +1,5 @@
+"""
+Semantic legends
+================
+With UltraPlot semantic legends can be expressed in a flexible and cohesive manner with customg glyphs, latex and or spatial locations.
+"""

docs/examples/legends_colorbars/03_semantic_legends.py

@@ -18,6 +18,104 @@
 * :doc:`Colorbars and legends </colorbars_legends>`
 """
 
+# %%
+# Semantic Legend with custom markers and advanced styles
+import matplotlib.transforms as mtransforms
+import numpy as np
+from matplotlib.markers import CapStyle, JoinStyle, MarkerStyle
+from matplotlib.path import Path
+
+import ultraplot as uplt
+
+star = Path.unit_regular_star(6)
+circle = Path.unit_circle()
+star_path = Path.unit_regular_star(5)
+cut_star = Path(
+    vertices=np.concatenate([circle.vertices, star.vertices[::-1, ...]]),
+    codes=np.concatenate([circle.codes, star.codes]),
+)
+
+fig, ax = uplt.subplots()
+
+# upper left legend with custom mark
+ax.catlegend(
+    ["star", "cus_star"],
+    marker=[star_path, cut_star],
+    markersize=10,
+    add=True,
+    loc="ul",
+    title="Paths",
+    ncols=1,
+)
+
+# upper right legend with advanced CapStyle and JoinStyle
+ax.catlegend(
+    ["butt / round", "round / miter", "projecting / bevel"],
+    marker="1",
+    markersize=10,
+    markeredgecolor=list("gbr"),
+    markeredgewidth=4,
+    markerfacecoloralt="none",
+    marker_capstyle=[
+        CapStyle.butt,
+        CapStyle.round,
+        CapStyle.projecting,
+    ],
+    marker_joinstyle=[
+        JoinStyle.round,
+        JoinStyle.miter,
+        JoinStyle.bevel,
+    ],
+    marker_transform=[mtransforms.Affine2D().rotate_deg(x) for x in [0, 30, 60]],
+    title="Cap & Join Style",
+    add=True,
+    loc="ur",
+    ncols=1,
+)
+
+# center geolegend with different styles
+ax.geolegend(
+    ["rect", "tri", "hex", "AU"],
+    facecolor=["tab:red", "r", "k", "tab:blue"],
+    ec=["k", "g", "orange", "bright pink"],
+    loc="c",
+    title="geolegend",
+    ew=[0.5, 2, 1, 0.5],
+    markersize=10,
+    ncols=4,
+    handletextpad=0.1,
+    columnspacing=0.7,
+)
+
+# lower left legend with TeX symbols and rotation transform
+ax.catlegend(
+    ["\\infty", "\\sum", "\\int"],
+    marker=[r"$\infty$", r"$\sum$", r"$\int$"],
+    s=[6, 18, 9],  # ms/markersize=[6,8,10]
+    title="TeX symbols\nwith rotation",
+    marker_transform=[mtransforms.Affine2D().rotate_deg(x) for x in [30, 90, 45]],
+    add=True,
+    loc="ll",
+    ncols=1,
+)
+
+# lower right legend with different fill style
+ax.catlegend(
+    ["top", "bottom", "left", "right"],
+    marker="o",
+    markersize=10,
+    mfc=["r", "g", "b", "c"],
+    markerfacecoloralt="lightsteelblue",
+    markeredgecolor=["k", "r", "y", "b"],
+    fillstyle=["top", "bottom", "left", "right"],
+    title="Half filled",
+    add=True,
+    loc="lr",
+    ncols=1,
+)
+ax.axis("off")
+
+
 # %%
 import cartopy.crs as ccrs
 import shapely.geometry as sg