For debugging purposes. Writes the transform tree rooted at 'self' to a graphviz "dot" format file. This file can be run through the "dot" utility to produce a graph of the transform tree. Affine transforms are marked in blue. Bounding
(self, fobj, highlight=[])
| 190 | |
| 191 | if DEBUG: |
| 192 | def write_graphviz(self, fobj, highlight=[]): |
| 193 | """ |
| 194 | For debugging purposes. |
| 195 | |
| 196 | Writes the transform tree rooted at 'self' to a graphviz "dot" |
| 197 | format file. This file can be run through the "dot" utility |
| 198 | to produce a graph of the transform tree. |
| 199 | |
| 200 | Affine transforms are marked in blue. Bounding boxes are |
| 201 | marked in yellow. |
| 202 | |
| 203 | *fobj*: A Python file-like object |
| 204 | |
| 205 | Once the "dot" file has been created, it can be turned into a |
| 206 | png easily with:: |
| 207 | |
| 208 | $> dot -Tpng -o $OUTPUT_FILE $DOT_FILE |
| 209 | |
| 210 | """ |
| 211 | seen = set() |
| 212 | |
| 213 | def recurse(root): |
| 214 | if root in seen: |
| 215 | return |
| 216 | seen.add(root) |
| 217 | props = {} |
| 218 | label = root.__class__.__name__ |
| 219 | if root._invalid: |
| 220 | label = '[%s]' % label |
| 221 | if root in highlight: |
| 222 | props['style'] = 'bold' |
| 223 | props['shape'] = 'box' |
| 224 | props['label'] = '"%s"' % label |
| 225 | props = ' '.join(map('{0[0]}={0[1]}'.format, props.items())) |
| 226 | |
| 227 | fobj.write('%s [%s];\n' % (hash(root), props)) |
| 228 | |
| 229 | if hasattr(root, '_children'): |
| 230 | for child in root._children: |
| 231 | name = next((key for key, val in root.__dict__.items() |
| 232 | if val is child), '?') |
| 233 | fobj.write('"%s" -> "%s" [label="%s", fontsize=10];\n' |
| 234 | % (hash(root), |
| 235 | hash(child), |
| 236 | name)) |
| 237 | recurse(child) |
| 238 | |
| 239 | fobj.write("digraph G {\n") |
| 240 | recurse(self) |
| 241 | fobj.write("}\n") |
| 242 | |
| 243 | |
| 244 | class BboxBase(TransformNode): |