Method paste

src/core/node_graph.py:264–299

Pastes nodes and connections from clipboard at mouse position or viewport center.

(self, mouse_position=None)

        return clipboard_data

    def paste(self, mouse_position=None):
        """Pastes nodes and connections from clipboard at mouse position or viewport center."""
        clipboard_text = QApplication.clipboard().text()
        
        # Use mouse position if provided, otherwise fall back to viewport center
        if mouse_position is not None:
            paste_pos = mouse_position
        else:
            # Existing fallback logic
            paste_pos = QPointF(0, 0)  # Default position
            views = self.views()
            if views:
                paste_pos = views[0].mapToScene(views[0].viewport().rect().center())
        
        try:
            # Try to parse as markdown first
            from data.flow_format import FlowFormatHandler
            handler = FlowFormatHandler()
            data = handler.markdown_to_data(clipboard_text)
            self._paste_with_command(data, paste_pos)
        except ImportError:
            # FlowFormatHandler not available, try JSON
            try:
                import json
                data = json.loads(clipboard_text)
                self._paste_with_command(data, paste_pos)
            except (json.JSONDecodeError, TypeError):
                print("Clipboard does not contain valid graph data.")
        except Exception:
            # Fallback: try to parse as JSON for backward compatibility
            try:
                import json
                data = json.loads(clipboard_text)
                self._paste_with_command(data, paste_pos)
            except (json.JSONDecodeError, TypeError):
                print("Clipboard does not contain valid graph data.")
    
    def _paste_with_command(self, data, paste_pos):
        """Helper method to paste using PasteNodesCommand."""