Added hatch test

Author: MadsAdrian

test/test_hatch.py

@@ -0,0 +1,67 @@
+from helpers import assert_equality
+
+
+def plot():
+    """
+        Hatch demo code from
+        https://matplotlib.org/3.1.1/gallery/shapes_and_collections/hatch_demo.html
+
+        Slightly modified to test more aspects of the hatch implementation
+    """
+    import matplotlib.pyplot as plt
+    from matplotlib.patches import Ellipse, Polygon
+    import numpy as np
+
+    fig, (ax1, ax2, ax3) = plt.subplots(3)
+
+    ax1.bar(range(1, 5), range(1, 5), color="red", edgecolor="black", hatch="/")
+    ax1.bar(
+        range(1, 5),
+        [6] * 4,
+        bottom=range(1, 5),
+        color="blue",
+        edgecolor="black",
+        hatch="//",
+    )
+    ax1.set_xticks([1.5, 2.5, 3.5, 4.5])
+
+    bars = ax2.bar(
+        range(1, 5), range(1, 5), color="yellow", edgecolor="black"
+    ) + ax2.bar(range(1, 5), [6] * 4, bottom=range(1, 5), color="green")
+    ax2.set_xticks([1.5, 2.5, 3.5, 4.5])
+
+    patterns = ("-", "+", "x", "\\", "*", "o", "O", ".")
+    for bar, pattern in zip(bars, patterns):
+        bar.set_hatch(pattern)
+
+    ax3.fill(
+        [1, 3, 3, 1], [1, 1, 2, 2], fill=False, hatch="\\", zorder=1, label="Square"
+    )
+    ax3.add_patch(
+        Ellipse((4, 1.5), 4, 0.5, fill="green", hatch="*", zorder=3, label="Ellipse")
+    )
+    p = Polygon(
+        [[0, 0], [4, 1.1], [6, 2.5], [2, 1.4]],
+        closed=True,
+        fill=False,
+        hatch="/",
+        zorder=2,
+        label="Polygon",
+    )
+    p._hatch_color = (0.5, 0.3, 0.8, 0.7)
+    ax3.add_patch(p)
+    ax3.set_xlim((0, 6))
+    ax3.set_ylim((0, 2.5))
+    ax3.legend()
+
+    return fig
+
+
+def test():
+    assert_equality(plot, "test_hatch_reference.tex")
+
+
+if __name__ == "__main__":
+    import helpers
+
+    helpers.compare_mpl_latex(plot)

test/test_hatch_reference.tex

@@ -0,0 +1,82 @@
+\begin{tikzpicture}
+
+\definecolor{color0}{rgb}{1,1,0}
+\definecolor{color1}{rgb}{0.12156862745098,0.466666666666667,0.705882352941177}
+\definecolor{color2}{rgb}{0.5,0.3,0.8}
+
+\begin{groupplot}[group style={group size=1 by 3}]
+\nextgroupplot[
+tick align=outside,
+tick pos=left,
+x grid style={white!69.01960784313725!black},
+xmin=0.41, xmax=4.59,
+xtick style={color=black},
+y grid style={white!69.01960784313725!black},
+ymin=0, ymax=10.5,
+ytick style={color=black}
+]
+\draw[draw=black,fill=red,postaction={pattern=north east lines}] (axis cs:0.6,0) rectangle (axis cs:1.4,1);
+\draw[draw=black,fill=red,postaction={pattern=north east lines}] (axis cs:1.6,0) rectangle (axis cs:2.4,2);
+\draw[draw=black,fill=red,postaction={pattern=north east lines}] (axis cs:2.6,0) rectangle (axis cs:3.4,3);
+\draw[draw=black,fill=red,postaction={pattern=north east lines}] (axis cs:3.6,0) rectangle (axis cs:4.4,4);
+\draw[draw=black,fill=blue,postaction={pattern=north east lines}] (axis cs:0.6,1) rectangle (axis cs:1.4,7);
+\draw[draw=black,fill=blue,postaction={pattern=north east lines}] (axis cs:1.6,2) rectangle (axis cs:2.4,8);
+\draw[draw=black,fill=blue,postaction={pattern=north east lines}] (axis cs:2.6,3) rectangle (axis cs:3.4,9);
+\draw[draw=black,fill=blue,postaction={pattern=north east lines}] (axis cs:3.6,4) rectangle (axis cs:4.4,10);
+
+\nextgroupplot[
+tick align=outside,
+tick pos=left,
+x grid style={white!69.01960784313725!black},
+xmin=0.41, xmax=4.59,
+xtick style={color=black},
+y grid style={white!69.01960784313725!black},
+ymin=0, ymax=10.5,
+ytick style={color=black}
+]
+\draw[draw=black,fill=color0,postaction={pattern=horizontal lines}] (axis cs:0.6,0) rectangle (axis cs:1.4,1);
+\draw[draw=black,fill=color0,postaction={pattern=grid}] (axis cs:1.6,0) rectangle (axis cs:2.4,2);
+\draw[draw=black,fill=color0,postaction={pattern=crosshatch}] (axis cs:2.6,0) rectangle (axis cs:3.4,3);
+\draw[draw=black,fill=color0,postaction={pattern=north west lines}] (axis cs:3.6,0) rectangle (axis cs:4.4,4);
+\draw[draw=none,fill=green!50.19607843137255!black,postaction={pattern=fivepointed stars}] (axis cs:0.6,1) rectangle (axis cs:1.4,7);
+\draw[draw=none,fill=green!50.19607843137255!black,postaction={pattern=sixpointed stars}] (axis cs:1.6,2) rectangle (axis cs:2.4,8);
+\draw[draw=none,fill=green!50.19607843137255!black,postaction={pattern=bricks}] (axis cs:2.6,3) rectangle (axis cs:3.4,9);
+\draw[draw=none,fill=green!50.19607843137255!black,postaction={pattern=crosshatch dots}] (axis cs:3.6,4) rectangle (axis cs:4.4,10);
+
+\nextgroupplot[
+legend cell align={left},
+legend style={fill opacity=0.8, draw opacity=1, text opacity=1, draw=white!80.0!black},
+tick align=outside,
+tick pos=left,
+x grid style={white!69.01960784313725!black},
+xmin=0, xmax=6,
+xtick style={color=black},
+y grid style={white!69.01960784313725!black},
+ymin=0, ymax=2.5,
+ytick style={color=black}
+]
+\path [draw=black, postaction={pattern=north west lines}]
+(axis cs:1,1)
+--(axis cs:3,1)
+--(axis cs:3,2)
+--(axis cs:1,2)
+--cycle;
+\addlegendimage{area legend, draw=black, postaction={pattern=north west lines}}
+\addlegendentry{Square}
+
+\path [draw=black, postaction={pattern=north east lines, pattern color=color2, fill opacity=0.7}]
+(axis cs:0,0)
+--(axis cs:4,1.1)
+--(axis cs:6,2.5)
+--(axis cs:2,1.4)
+--cycle;
+\addlegendimage{area legend, draw=black, postaction={pattern=north east lines, pattern color=color2, fill opacity=0.7}}
+\addlegendentry{Polygon}
+
+\draw[draw=none,fill=color1,postaction={pattern=fivepointed stars}] (axis cs:4,1.5) ellipse (2 and 0.25);
+\addlegendimage{area legend, draw=none, fill=color1, postaction={pattern=fivepointed stars}}
+\addlegendentry{Ellipse}
+
+\end{groupplot}
+
+\end{tikzpicture}