README
rqt_dotgraph
Provides a ROS2 node and an rqt plugin for visualizing DOT graph files. You can either load a DOT file or subscribe to a ROS2 topic.
To visualize the DOT graphs, this module includes a version of xdot_qt.py
forked from ROSPlan and released under LGPLv3.
The forked version in this package has been modified and the changes to it are released under the LGPLv3.
The rest of this package is released under the CC0 license.
Nodes
rqt_dotgraph
Subscriptions
dot_graph (std_msgs/String)
String containing the dot graph itself (e.g. the contents of a DOT file).
Parameters
~title (string, default: Dot Graph Viewer)
Window title.
Troubleshooting
Plugin File Not Found
rqt plugins can have issues running.
This has occurred most often after updating graphics drivers.
A typical error message is the following.
RosPluginProvider._parse_plugin_xml() plugin file "/home/user/ws/install/rqt_dotgraph/share/rqt_dotgraph/plugin.xml" in package "rqt_dotgraph" not found
The fix is to run the following command then continue with previous commands where the error occurred.
ros2 run rqt_dotgraph rqt_dotgraph --force-discover
Import Errors when Running
When running the node with
ros2 run rqt_dotgraph rqt_dotgraph
and this error occurs
ImportError: cannot import name 'QVariant' from 'PySide2.QtCore' (/home/thomas/src/rqt_dotgraph/venv/lib/python3.10/site-packages/PySide2/QtCore.abi3.so)
Fix it with
pip install PyQt5
If this error occurs
ModuleNotFoundError: No module named 'PySide2'
Fix it with
pip install PySide2