NodeGraphQT

This is a personal project I'm working on in my spare time, as a learning exercise for writing a custom node graph.

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

Requirements

• Python 3
• PySide2

Navigation Controls

action	controls
Zoom in/out	RMB + Drag or Mouse Scroll Up/Down
Pan	MMB + Drag or Alt + LMB + Drag

Node Search

action	hotkey
Show node search	Tab

Context Menu

API Documentation

currently unavaliable

Example Code

import sys
from PySide2 import QtWidgets
from NodeGraphQt import NodeGraph, Node, Backdrop

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

    # unique node identifier.
    __identifier__ = 'com.chantasticvfx'

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

    def __init__(self):
        super(MyNode, self).__init__()
        self.add_input('foo')
        self.add_output('bar')


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

    # create the main node graph controller.
    graph = NodeGraph()
   
    # register backdrop node. (included in the NodeGraphQt module)
    graph.register_node(Backdrop)
   
    # 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='Foo Node')
    node_b = graph.create_node('com.chantasticvfx.MyNode', name='Bar Node', color='#5b162f')
    
    # connect nodes.
    node_a.set_input(0, node_b.output(0))    

    # show widget.
    viewer = graph.viewer()
    viewer.show()

    app.exec_()