Add helpers for common artist edges

Author: ksunden

Diff for: data_prototype/axes.py

@@ -2,9 +2,12 @@
 
 
 import matplotlib as mpl
+from data_prototype.artist import CompatibilityAxes
 from matplotlib.axes._axes import Axes as MPLAxes, _preprocess_data
+from matplotlib.axes._base import _process_plot_var_args
 import matplotlib.collections as mcoll
 import matplotlib.cbook as cbook
+import matplotlib.lines as mlines
 import matplotlib.markers as mmarkers
 import matplotlib.projections as mprojections
 
@@ -14,13 +17,20 @@
     FunctionConversionNode,
     RenameConversionNode,
 )
+from .line import Line
 from .wrappers import PathCollectionWrapper
 
 
 class Axes(MPLAxes):
     # Name for registering as a projection so we can experiment with it
     name = "data-prototype"
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._ca = CompatibilityAxes(self)
+        self._get_lines_mirror = _process_plot_var_args("mirror")
+        self.add_artist(self._ca)
+
     @_preprocess_data(
         replace_names=[
             "x",
@@ -142,6 +152,22 @@ def scatter(
         self._request_autoscale_view()
         return pcw
 
+    def plot(self, *args, scalex=True, scaley=True, data=None, **kwargs):
+        kwargs = cbook.normalize_kwargs(kwargs, mlines.Line2D)
+        line_args = [*self._get_lines_mirror(self, *args, data=data, **kwargs)]
+        print(line_args)
+        lines = []
+        for coord, kws in line_args:
+            cont = ArrayContainer(**{"x": coord[0], "y": coord[1]})
+            line = Line(cont, **kws)
+            lines.append(line)
+            self._ca.add_artist(line)
+        if scalex:
+            self._request_autoscale_view("x")
+        if scaley:
+            self._request_autoscale_view("y")
+        return lines
+
 
 # This is a handy trick to allow e.g. plt.subplots(subplot_kw={'projection': 'data-prototype'})
 mprojections.register_projection(Axes)

Diff for: data_prototype/conversion_edge.py

@@ -7,7 +7,7 @@
 from typing import Any
 import numpy as np
 
-from data_prototype.description import Desc, desc_like
+from data_prototype.description import Desc, desc_like, ShapeSpec
 
 from matplotlib.transforms import Transform
 
@@ -112,6 +112,17 @@ def from_default_value(
     ) -> "DefaultEdge":
         return cls(name, {}, {key: output}, weight, invertable=False, value=value)
 
+    @classmethod
+    def from_rc(
+        cls, rc_name: str, key: str | None = None, coordinates: str = "display"
+    ):
+        from matplotlib import rcParams
+
+        if key is None:
+            key = rc_name.split(".")[-1]
+        scalar = Desc((), coordinates)
+        return cls.from_default_value(f"{rc_name}_rc", key, scalar, rcParams[rc_name])
+
     def evaluate(self, input: dict[str, Any]) -> dict[str, Any]:
         return {k: self.value for k in self.output}
 
@@ -428,3 +439,24 @@ def cache_key(self):
         import uuid
 
         return str(uuid.uuid4())
+
+def coord_and_default(
+    key: str,
+    shape: ShapeSpec = (),
+    coordinates: str = "display",
+    default_value: Any = None,
+    default_rc: str | None = None,
+):
+    if default_rc is not None:
+        if default_value is not None:
+            raise ValueError(
+                "Only one of 'default_value' and 'default_rc' may be specified"
+            )
+        def_edge = DefaultEdge.from_rc(default_rc, key, coordinates)
+    else:
+        scalar = Desc((), coordinates)
+        def_edge = DefaultEdge.from_default_value(
+            f"{key}_def", key, scalar, default_value
+        )
+    coord_edge = CoordinateEdge.from_coords(key, {key: Desc(shape)}, coordinates)
+    return coord_edge, def_edge

Diff for: data_prototype/text.py

@@ -4,41 +4,24 @@
 
 from .artist import Artist
 from .description import Desc
-from .conversion_edge import Graph, CoordinateEdge, DefaultEdge
+from .conversion_edge import Graph, CoordinateEdge, coord_and_default
 
 
 class Text(Artist):
     def __init__(self, container, edges=None, **kwargs):
         super().__init__(container, edges, **kwargs)
 
-        scalar = Desc((), "display")
-
         edges = [
             CoordinateEdge.from_coords(
                 "xycoords", {"x": Desc((), "auto"), "y": Desc((), "auto")}, "data"
             ),
-            CoordinateEdge.from_coords("text", {"text": Desc(())}, "display"),
-            CoordinateEdge.from_coords("color", {"color": Desc(())}, "display"),
-            CoordinateEdge.from_coords("alpha", {"alpha": Desc(())}, "display"),
-            CoordinateEdge.from_coords(
-                "fontproperties", {"fontproperties": Desc(())}, "display"
-            ),
-            CoordinateEdge.from_coords("usetex", {"usetex": Desc(())}, "display"),
-            CoordinateEdge.from_coords("rotation", {"rotation": Desc(())}, "display"),
-            CoordinateEdge.from_coords(
-                "antialiased", {"antialiased": Desc(())}, "display"
-            ),
-            DefaultEdge.from_default_value("text_def", "text", scalar, ""),
-            DefaultEdge.from_default_value("color_def", "color", scalar, "k"),
-            DefaultEdge.from_default_value("alpha_def", "alpha", scalar, 1),
-            DefaultEdge.from_default_value(
-                "fontproperties_def", "fontproperties", scalar, FontProperties()
-            ),
-            DefaultEdge.from_default_value("usetex_def", "usetex", scalar, False),
-            DefaultEdge.from_default_value("rotation_def", "rotation", scalar, 0),
-            DefaultEdge.from_default_value(
-                "antialiased_def", "antialiased", scalar, False
-            ),
+            *coord_and_default("text", default_value=""),
+            *coord_and_default("color", default_rc="text.color"),
+            *coord_and_default("alpha", default_value=1),
+            *coord_and_default("fontproperties", default_value=FontProperties()),
+            *coord_and_default("usetex", default_rc="text.usetex"),
+            *coord_and_default("rotation", default_value=0),
+            *coord_and_default("antialiased", default_rc="text.antialiased"),
         ]
 
         self._graph = self._graph + Graph(edges)