Commit before rebuilding in OdenGraphQT

Experimental/experimental_nodes.py

@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+"""
+Standalone NodeGraphQT Math Node Example
+
+This example defines a custom "Math Node" that:
+  - Uses two text inputs for numeric operands (via add_text_input)
+  - Provides a combo box for operator selection (via add_combo_menu)
+  - Offers a checkbox to enable/disable the operation (via add_checkbox)
+  - Computes a result and updates its title accordingly.
+"""
+
+from NodeGraphQt import NodeGraph, BaseNode
+
+class MathNode(BaseNode):
+    """
+    Math Node:
+      - Operands: Two text inputs (Operand 1 and Operand 2)
+      - Operator: Combo box to select 'Add', 'Subtract', 'Multiply', or 'Divide'
+      - Enable: Checkbox to enable/disable the math operation
+      - Output: Result of the math operation (if enabled)
+    """
+    __identifier__ = 'example.math'
+    NODE_NAME = 'Math Node'
+
+    def __init__(self):
+        super(MathNode, self).__init__()
+
+        # Add two text inputs for operands.
+        self.add_text_input('operand1', 'Operand 1', text='10')
+        self.add_text_input('operand2', 'Operand 2', text='5')
+
+        # Add a combo box for operator selection.
+        self.add_combo_menu('operator', 'Operator', items=['Add', 'Subtract', 'Multiply', 'Divide'])
+
+        # Add a checkbox to enable/disable the operation.
+        self.add_checkbox('enable', 'Enable Operation', state=True)
+
+        # Add an output port to transmit the result.
+        self.add_output('Result')
+
+        self.value = 0
+        self.set_name("Math Node")
+        self.process_input()
+
+    def process_input(self):
+        """
+        Gather values from the widgets, perform the math operation if enabled,
+        update the node title, and send the result to connected nodes.
+        """
+        try:
+            op1 = float(self.get_property('operand1'))
+        except (ValueError, TypeError):
+            op1 = 0.0
+        try:
+            op2 = float(self.get_property('operand2'))
+        except (ValueError, TypeError):
+            op2 = 0.0
+
+        operator = self.get_property('operator')
+        enable = self.get_property('enable')
+
+        if enable:
+            if operator == 'Add':
+                result = op1 + op2
+            elif operator == 'Subtract':
+                result = op1 - op2
+            elif operator == 'Multiply':
+                result = op1 * op2
+            elif operator == 'Divide':
+                result = op1 / op2 if op2 != 0 else 0.0
+            else:
+                result = 0.0
+        else:
+            result = 0.0
+
+        self.value = result
+        self.set_name(f"Result: {result}")
+
+        output_port = self.output(0)
+        if output_port and output_port.connected_ports():
+            for connected_port in output_port.connected_ports():
+                connected_node = connected_port.node()
+                if hasattr(connected_node, 'receive_data'):
+                    connected_node.receive_data(result, source_port_name='Result')
+
+
+if __name__ == '__main__':
+    import sys
+    try:
+        from PySide2.QtWidgets import QApplication
+    except ImportError:
+        from PySide6.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    graph = NodeGraph()
+    graph.register_node(MathNode)
+    node = graph.create_node('example.math.MathNode', name='Math Node')
+    node.set_pos(100, 100)
+    graph.widget.resize(1200, 800)
+    graph.widget.setWindowTitle("NodeGraphQT Math Node Demo")
+    graph.widget.show()
+    sys.exit(app.exec_())