visualization.py: add legend to html

# Last 3 commits:

# d94db75 visualization.py: add legend to html
# c695e05 visualization.py: layout for small graphs
# 2c5c1c3 visualization.py: decrease fontsize

Author: cknoll

src/pyirk/templates/node_template.html

@@ -6,7 +6,7 @@ <h1>{{context.title}}</h1>
 {% if context.desc %}{{context.desc}}{% endif %}
 <br>
 <br>
-<div><img src="{{context.img_source}}" usemap="#G"></div>
+<div><img src="{{context.img_source}}" usemap="#G"><img src="{{context.img_legend_source}}"></div>
 {{context.map}}
 <br>
 <p><a href="index.html">Back to index</a></p>

src/pyirk/visualization.py

@@ -578,7 +578,7 @@ def get_node_color(node):
                 "style": "solid",
                 "arrowType": "normal",
                 "penwidth": 2,
-                "minlen": 1,
+                "minlen": 1,  # note: this only applies to dot layout
                 # label
                 "label": d["edge"].short_key,
                 "fontsize": FONTSIZE,
@@ -924,6 +924,7 @@ def create_interactive_graph(self, url_template="", output_dir="graph_site", rad
             context = {
                 "title": node_name + " " + item.R1.value,
                 "img_source": f"{node_name}.svg",
+                "img_legend_source": f"{node_name}_legend.svg",
                 "map": image_map,
                 "desc": desc
             }