fix(examples): update for mesa>=3.0 (#273)

* chore: update for mesa>=3.0

* cmt

Author: dlovell

examples/forest_fire/app.py

@@ -0,0 +1,60 @@
+from forest_fire.model import ForestFire
+from mesa.visualization import (
+    SolaraViz,
+    make_plot_component,
+    make_space_component,
+)
+from mesa.visualization.user_param import (
+    Slider,
+)
+
+COLORS = {"Fine": "#00AA00", "On Fire": "#880000", "Burned Out": "#000000"}
+
+
+def forest_fire_portrayal(tree):
+    if tree is None:
+        return
+    portrayal = {"Shape": "rect", "w": 1, "h": 1, "Filled": "true", "Layer": 0}
+    (x, y) = (tree.cell.coordinate[i] for i in (0, 1))
+    portrayal["x"] = x
+    portrayal["y"] = y
+    portrayal["color"] = COLORS[tree.condition]
+    return portrayal
+
+
+def post_process_space(ax):
+    ax.set_aspect("equal")
+    ax.set_xticks([])
+    ax.set_yticks([])
+
+
+def post_process_lines(ax):
+    ax.legend(loc="center left", bbox_to_anchor=(1, 0.9))
+
+
+space_component = make_space_component(
+    forest_fire_portrayal,
+    draw_grid=False,
+    post_process=post_process_space,
+)
+lineplot_component = make_plot_component(
+    COLORS,
+    post_process=post_process_lines,
+)
+# TODO: add back in pie chart component
+# # no current pie chart equivalent in mesa>=3.0
+# pie_chart = mesa.visualization.PieChartModule(
+#     [{"Label": label, "Color": color} for (label, color) in COLORS.items()]
+# )
+model = ForestFire()
+model_params = {
+    "height": 100,
+    "width": 100,
+    "density": Slider("Tree density", 0.65, 0.01, 1.0, 0.01),
+}
+page = SolaraViz(
+    model,
+    components=[space_component, lineplot_component],
+    model_params=model_params,
+    name="Forest Fire",
+)

examples/forest_fire/forest_fire/server.py

@@ -1,3 +1,2 @@
 jupyter
-matplotlib
-mesa~=2.0
+mesa[viz]>=3.0