jchanvfx / Nodegraphqt

NodeGraphQt

(Note: this project is a work in progress and not production ready.)

NodeGraphQt is a node graph framework that can be implemented and re purposed into applications that supports PySide2.

Documentation

NodeGraphQt Documentation

Navigation

Slice Connections

Properties Bin

Vertical Layout

Pipe Layout

Example

import sys

from NodeGraphQt import QtWidgets
from NodeGraphQt import NodeGraph, BaseNode, BackdropNode, setup_context_menu

# create a example node object with a input/output port.
class MyNode(BaseNode):
    """example test node."""

    # unique node identifier domain. ("com.chantasticvfx.MyNode")
    __identifier__ = 'com.chantasticvfx'

    # initial default node name.
    NODE_NAME = 'My Node'

    def __init__(self):
        super(MyNode, self).__init__()
        self.add_input('foo', color=(180, 80, 0))
        self.add_output('bar')


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)

    # create the node graph controller.
    graph = NodeGraph()
    
    # set up default menu and commands.
    setup_context_menu(graph)
   
    # register backdrop node. (included in the NodeGraphQt module)
    graph.register_node(BackdropNode)
   
    # register example node into the node graph.
    graph.register_node(MyNode)
   
    # create nodes.
    backdrop = graph.create_node('nodeGraphQt.nodes.Backdrop', name='Backdrop')
    node_a = graph.create_node('com.chantasticvfx.MyNode', name='Node A')
    node_b = graph.create_node('com.chantasticvfx.MyNode', name='Node B', color='#5b162f')
    
    # connect node a input to node b output.
    node_a.set_input(0, node_b.output(0))    

    # get the widget and show.
    graph_widget = graph.widget
    graph_widget.show()

    app.exec_()