Added binary file format

BEdit/AGENTS.md

@@ -24,7 +24,8 @@ src/bedit/
 │   ├── model.py            # Document, component, graph, port, icon data
 │   ├── port_types.py       # Port type definitions and compatibility
 │   ├── serializer.py       # JSON persistence
-│   └── libraries.py        # Library file discovery and parsing
+│   ├── libraries.py        # Library file discovery and parsing
+│   └── simulation/         # Qt-free simulation service and compiler/runtime code
 └── gui/                    # All Qt-dependent code
     ├── app.py              # QApplication startup and palette
     ├── main_window.py      # Top-level UI orchestration
@@ -91,6 +92,9 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
 - Avoid the QSettings group name `general`; Qt treats `General` specially in INI
   files. Autosave keys live under `autosave/`.
 - User-visible document edits should participate in undo/redo.
+- Application-wide messages use `core.application_log.get_logger()`. The main
+  window installs the Qt log-panel handler; core code must only use standard
+  Python logging and must not import the GUI handler.
 
 ## Qt Designer and generated files
 
@@ -127,6 +131,9 @@ pyside6-uic --from-imports ui/icon_editor_dialog.ui \
 
 pyside6-uic --from-imports ui/text_definition_editor.ui \
   -o src/bedit/gui/generated/ui_text_definition_editor.py
+
+pyside6-uic --from-imports ui/simulation_settings_dialog.ui \
+  -o src/bedit/gui/generated/ui_simulation_settings_dialog.py
 ```
 
 When adding a promoted/custom widget in Designer, its header must use the real
@@ -155,6 +162,9 @@ runtime. A tiny generic prompt with one field and OK/Cancel may remain code-only
 ## Document and library files
 
 - Documents use the `bedit-document` JSON format.
+- Documents can be stored as human-readable `.bedit.json`/`.json` through
+  `JsonDocumentSerializer`, or as compressed MessagePack `.beb` through
+  `BebDocumentSerializer`. UI document I/O dispatches via `DocumentSerializer`.
 - `test.bedit.json` is a useful manually created example during development.
 - Library documents use the same recursive document model.
 - Library parsing belongs in `core/libraries.py`; Qt change notifications belong

BEdit/README.md

@@ -146,7 +146,7 @@ BEdit document used as a copy source. The built-in example defines A, B, and C.
 - File → Close Document removes the active document and returns to an empty
   workspace. An open graph uses a light gray grid whose visible and snapping
   spacing are configured separately.
-- Edit → Settings → Libraries accepts document files or folders of JSON files.
+- Edit → Settings → Libraries accepts JSON or `.beb` document files and folders.
 
 Every component owns its ports, declarative icon, properties, and child graph:
 

BEdit/pyproject.toml

@@ -9,6 +9,7 @@ description = "A starter Qt desktop application"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
+    "msgpack>=1.0,<2",
     "PySide6>=6.7,<7",
 ]
 
@@ -25,7 +26,7 @@ bedit = "bedit.gui.app:main"
 where = ["src"]
 
 [tool.setuptools.package-data]
-bedit = ["data/libraries/*.json"]
+bedit = ["data/libraries/*.json", "data/libraries/*.beb"]
 
 [tool.ruff]
 line-length = 100

BEdit/resources/resources.qrc

@@ -1,5 +1,7 @@
 <RCC>
   <qresource prefix="icons">
+    <file>icons/run-build.png</file>
+    <file>icons/preferences-system.png</file>
     <file>icons/draw-triangle.png</file>
     <file>icons/draw-ellipse.png</file>
     <file>icons/draw-circle.png</file>

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 \x89\
 PNG\x0d\x0a\x1a\x0a\x00\x00\x00\x0dIHDR\x00\
@@ -2271,6 +2532,10 @@ qt_resource_name = b"\
 \x00z\
 \x00o\x00o\x00m\x00-\x00o\x00r\x00i\x00g\x00i\x00n\x00a\x00l\x00.\x00p\x00n\x00g\
 \
+\x00\x0d\
+\x0f\xa5%\xc7\
+\x00r\
+\x00u\x00n\x00-\x00b\x00u\x00i\x00l\x00d\x00.\x00p\x00n\x00g\
 \x00\x0f\
 \x0bb\xb8g\
 \x00d\
@@ -2327,6 +2592,11 @@ qt_resource_name = b"\
 \x00e\
 \x00d\x00i\x00t\x00-\x00r\x00e\x00d\x00o\x00.\x00p\x00n\x00g\
 \x00\x16\
+\x01p\xe1\x87\
+\x00p\
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+\x00\x16\
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 \x00d\
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@@ -2383,59 +2653,63 @@ qt_resource_struct = b"\
 \x00\x00\x00\x00\x00\x00\x00\x00\
 \x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x02\
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 "
 

BEdit/src/bedit/core/application_log.py

@@ -0,0 +1,9 @@
+import logging
+
+
+LOGGER_NAME = "bedit"
+
+
+def get_logger(name: str | None = None) -> logging.Logger:
+    """Return the shared application logger, optionally scoped to a module."""
+    return logging.getLogger(LOGGER_NAME if name is None else f"{LOGGER_NAME}.{name}")

BEdit/src/bedit/core/libraries.py

@@ -1,8 +1,8 @@
-import json
 from dataclasses import dataclass
 from pathlib import Path
 
 from bedit.core.model import GraphDocument
+from bedit.core.serializer import DocumentSerializer
 
 
 @dataclass(frozen=True)
@@ -13,7 +13,7 @@ class LibraryDocument:
 
 
 def bundled_library_path() -> Path:
-    return Path(__file__).resolve().parents[1] / "data" / "libraries" / "default.json"
+    return Path(__file__).resolve().parents[1] / "data" / "libraries" / "default.beb"
 
 
 def default_library_paths() -> list[str]:
@@ -21,12 +21,12 @@ def default_library_paths() -> list[str]:
 
 
 def load_library_file(path: Path) -> LibraryDocument:
-    with path.open(encoding="utf-8") as file:
+    document = DocumentSerializer.load(path)
-        data = json.load(file)
-    document = GraphDocument.from_dict(data)
     name = str(document.metadata.get("name") or path.stem)
     return LibraryDocument(name, document, str(path))
 
 
 def library_candidates(path: Path) -> list[Path]:
-    return sorted(path.glob("*.json")) if path.is_dir() else [path]
+    if not path.is_dir():
+        return [path]
+    return sorted((*path.glob("*.json"), *path.glob("*.beb")))

BEdit/src/bedit/core/model.py

@@ -255,6 +255,7 @@ class Graph:
     connections: dict[str, Connection] = field(default_factory=dict)
     annotations: dict[str, Annotation] = field(default_factory=dict)
     junctions: dict[str, Junction] = field(default_factory=dict)
+    simulation_settings: dict[str, Any] = field(default_factory=dict)
 
     def to_dict(self) -> dict[str, Any]:
         return {
@@ -262,6 +263,7 @@ class Graph:
             "connections": [connection.to_dict() for connection in self.connections.values()],
             "annotations": [item.to_dict() for item in self.annotations.values()],
             "junctions": [junction.to_dict() for junction in self.junctions.values()],
+            "simulation": deepcopy(self.simulation_settings),
         }
 
     @classmethod
@@ -286,6 +288,7 @@ class Graph:
             connections={connection.id: connection for connection in connections},
             annotations={item.id: item for item in annotations},
             junctions={junction.id: junction for junction in junctions},
+            simulation_settings=deepcopy(data.get("simulation", {})),
         )
 
 
@@ -578,6 +581,7 @@ def clone_component(source: Component) -> Component:
                 )
                 for junction in current.graph.junctions.values()
             },
+            simulation_settings=deepcopy(current.graph.simulation_settings),
         )
         return Component(
             id=str(uuid4()),

BEdit/src/bedit/core/serializer.py

@@ -1,6 +1,9 @@
 import json
+import zlib
 from pathlib import Path
 
+import msgpack
+
 from bedit.core.model import GraphDocument
 
 
@@ -20,3 +23,54 @@ class JsonDocumentSerializer:
             json.dump(document.to_dict(), file, indent=2)
             file.write("\n")
         temporary_path.replace(path)
+
+
+class BebDocumentSerializer:
+    """Compressed MessagePack serializer for the binary .beb format."""
+
+    MAGIC = b"BEB\x00"
+    VERSION = 1
+
+    @classmethod
+    def load(cls, path: Path) -> GraphDocument:
+        payload = path.read_bytes()
+        header = cls.MAGIC + bytes([cls.VERSION])
+        if not payload.startswith(header):
+            raise ValueError("This is not a supported BEdit binary document")
+        try:
+            data = msgpack.unpackb(zlib.decompress(payload[len(header) :]), raw=False)
+        except (ValueError, zlib.error, msgpack.exceptions.MsgpackException) as error:
+            raise ValueError("The BEdit binary document is damaged") from error
+        if not isinstance(data, dict):
+            raise ValueError("The BEdit binary document has an invalid root value")
+        return GraphDocument.from_dict(data)
+
+    @classmethod
+    def save(cls, document: GraphDocument, path: Path) -> None:
+        packed = msgpack.packb(document.to_dict(), use_bin_type=True)
+        payload = cls.MAGIC + bytes([cls.VERSION]) + zlib.compress(packed, level=9)
+        temporary_path = path.with_suffix(path.suffix + ".tmp")
+        temporary_path.write_bytes(payload)
+        temporary_path.replace(path)
+
+
+class DocumentSerializer:
+    """Select the document serializer from its file extension."""
+
+    @staticmethod
+    def load(path: Path) -> GraphDocument:
+        serializer = (
+            BebDocumentSerializer
+            if path.suffix.lower() == ".beb"
+            else JsonDocumentSerializer
+        )
+        return serializer.load(path)
+
+    @staticmethod
+    def save(document: GraphDocument, path: Path) -> None:
+        serializer = (
+            BebDocumentSerializer
+            if path.suffix.lower() == ".beb"
+            else JsonDocumentSerializer
+        )
+        serializer.save(document, path)

BEdit/src/bedit/core/simulation/__init__.py

@@ -0,0 +1,3 @@
+from bedit.core.simulation.service import Simulation
+
+__all__ = ["Simulation"]

BEdit/src/bedit/core/simulation/service.py

@@ -0,0 +1,18 @@
+from copy import deepcopy
+from typing import Any
+
+
+class Simulation:
+    """Application-owned simulation service and state container."""
+
+    def __init__(self) -> None:
+        self.state: dict[str, Any] = {}
+        self.last_compilation_input: dict[str, Any] | None = None
+
+    def compile(self, graph: dict[str, Any]) -> None:
+        """Compile a graph definition.
+
+        This is intentionally a stub. Keeping a copy of the input makes the
+        service useful for incremental compiler development and UI inspection.
+        """
+        self.last_compilation_input = deepcopy(graph)

BEdit/src/bedit/data/libraries/default.json

@@ -1,435 +0,0 @@
-{
-  "format": "bedit-document",
-  "version": 1,
-  "metadata": {
-    "name": "Untitled"
-  },
-  "roots": [
-    {
-      "id": "7ad651ef-6f76-4064-81d3-3fd6dd4d2918",
-      "name": "gain",
-      "position": {
-        "x": 0.0,
-        "y": 0.0
-      },
-      "rotation": 0.0,
-      "interface": {
-        "inputs": [
-          {
-            "id": "port-df34ce84",
-            "name": "in",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 64.0,
-                "y": 64.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ],
-        "outputs": [
-          {
-            "id": "port-fe9e6486",
-            "name": "out",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 88.0,
-                "y": 40.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ]
-      },
-      "icon": {
-        "shape": "rectangle",
-        "fill": "#f4f4f4",
-        "border": "#303030",
-        "text": "Text",
-        "size": {
-          "width": 128.0,
-          "height": 128.0
-        },
-        "elements": [
-          {
-            "type": "rectangle",
-            "x": 32.0,
-            "y": 32.0,
-            "width": 64.0,
-            "height": 64.0,
-            "fill": "#f4f4f4",
-            "stroke": "#303030",
-            "lineWidth": 1.5,
-            "lineStyle": "solid",
-            "cornerRadius": 5.0
-          },
-          {
-            "type": "text",
-            "x": 40.0,
-            "y": 40.0,
-            "width": 48.0,
-            "height": 48.0,
-            "text": "K",
-            "color": "#00007f",
-            "fontSize": 24.0,
-            "lineStyle": "solid",
-            "lineWidth": 1.5,
-            "stroke": "#00007f",
-            "fill": "#ffffff"
-          }
-        ]
-      },
-      "properties": {
-        "showName": false
-      },
-      "library": {
-        "showSubtree": true
-      },
-      "implementation": {
-        "kind": "text",
-        "source": {
-          "equations": "out = k*in;",
-          "parameters": [
-            {
-              "id": "parameter-61a43a86",
-              "name": "k",
-              "type": "real",
-              "value": "1"
-            }
-          ]
-        }
-      }
-    },
-    {
-      "id": "12b21b11-8828-4a90-a561-19491dc9632e",
-      "name": "differentiate",
-      "position": {
-        "x": 0.0,
-        "y": 0.0
-      },
-      "rotation": 0.0,
-      "interface": {
-        "inputs": [
-          {
-            "id": "port-1cbabc8f",
-            "name": "in",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 64.0,
-                "y": 64.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ],
-        "outputs": [
-          {
-            "id": "port-4eeea4e7",
-            "name": "out",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 88.0,
-                "y": 40.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ]
-      },
-      "icon": {
-        "shape": "rectangle",
-        "fill": "#f4f4f4",
-        "border": "#303030",
-        "text": "Text",
-        "size": {
-          "width": 128.0,
-          "height": 128.0
-        },
-        "elements": [
-          {
-            "type": "rectangle",
-            "x": 32.0,
-            "y": 32.0,
-            "width": 64.0,
-            "height": 64.0,
-            "fill": "#f4f4f4",
-            "stroke": "#303030",
-            "lineWidth": 1.5,
-            "lineStyle": "solid",
-            "cornerRadius": 5.0
-          },
-          {
-            "type": "text",
-            "x": 40.0,
-            "y": 40.0,
-            "width": 48.0,
-            "height": 48.0,
-            "text": "d/dt",
-            "color": "#00007f",
-            "fontSize": 18.0,
-            "lineStyle": "solid",
-            "lineWidth": 1.5,
-            "stroke": "#00007f",
-            "fill": "#ffffff"
-          }
-        ]
-      },
-      "properties": {
-        "showName": false
-      },
-      "library": {
-        "showSubtree": true
-      },
-      "implementation": {
-        "kind": "text",
-        "source": {
-          "equations": "initial out = initial;\nout = der(in);",
-          "parameters": [
-            {
-              "id": "parameter-331e38be",
-              "name": "initial",
-              "type": "real",
-              "value": "0"
-            }
-          ]
-        }
-      }
-    },
-    {
-      "id": "afdc7696-622b-47e4-b2c3-28ec60786bf2",
-      "name": "integrate",
-      "position": {
-        "x": 0.0,
-        "y": 0.0
-      },
-      "rotation": 0.0,
-      "interface": {
-        "inputs": [
-          {
-            "id": "port-12903207",
-            "name": "in",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 64.0,
-                "y": 64.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ],
-        "outputs": [
-          {
-            "id": "port-b3370b1a",
-            "name": "out",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 88.0,
-                "y": 40.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ]
-      },
-      "icon": {
-        "shape": "rectangle",
-        "fill": "#f4f4f4",
-        "border": "#303030",
-        "text": "Text",
-        "size": {
-          "width": 128.0,
-          "height": 128.0
-        },
-        "elements": [
-          {
-            "type": "rectangle",
-            "x": 32.0,
-            "y": 32.0,
-            "width": 64.0,
-            "height": 64.0,
-            "fill": "#f4f4f4",
-            "stroke": "#303030",
-            "lineWidth": 1.5,
-            "lineStyle": "solid",
-            "cornerRadius": 5.0
-          },
-          {
-            "type": "text",
-            "x": 64.0,
-            "y": 40.0,
-            "width": 28.0,
-            "height": 48.0,
-            "text": "dt",
-            "color": "#00007f",
-            "fontSize": 18.0,
-            "lineStyle": "solid",
-            "lineWidth": 1.5,
-            "stroke": "#00007f",
-            "fill": "#ffffff"
-          },
-          {
-            "type": "text",
-            "x": 40.0,
-            "y": 32.0,
-            "width": 28.0,
-            "height": 54.0,
-            "fill": "none",
-            "stroke": "#00007f",
-            "lineWidth": 1.5,
-            "lineStyle": "none",
-            "text": "\u222b",
-            "fontSize": 32.0,
-            "color": "#00007f"
-          }
-        ]
-      },
-      "properties": {
-        "showName": false
-      },
-      "library": {
-        "showSubtree": true
-      },
-      "implementation": {
-        "kind": "text",
-        "source": {
-          "equations": "initial out = initial;\nder(out) = in;",
-          "parameters": [
-            {
-              "id": "parameter-6bdc1c76",
-              "name": "initial",
-              "type": "real",
-              "value": "0"
-            }
-          ]
-        }
-      }
-    },
-    {
-      "id": "f6b8e5c9-4d13-4f7b-b574-e00ca96e42c3",
-      "name": "add",
-      "position": {
-        "x": 0.0,
-        "y": 0.0
-      },
-      "rotation": 0.0,
-      "interface": {
-        "inputs": [
-          {
-            "id": "port-c995845c",
-            "name": "in",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 64.0,
-                "y": 64.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": true
-          }
-        ],
-        "outputs": [
-          {
-            "id": "port-a2f0dea6",
-            "name": "out",
-            "position": {
-              "x": 0.0,
-              "y": 0.0
-            },
-            "properties": {
-              "iconPosition": {
-                "x": 80.0,
-                "y": 48.0
-              }
-            },
-            "type": "signal",
-            "multipleConnections": false
-          }
-        ]
-      },
-      "icon": {
-        "shape": "rectangle",
-        "fill": "#f4f4f4",
-        "border": "#303030",
-        "text": "Text",
-        "size": {
-          "width": 128.0,
-          "height": 128.0
-        },
-        "elements": [
-          {
-            "type": "circle",
-            "x": 40.0,
-            "y": 40.0,
-            "width": 48.0,
-            "height": 48.0,
-            "fill": "#f4f4f4",
-            "stroke": "#303030",
-            "lineWidth": 1.5,
-            "lineStyle": "solid"
-          },
-          {
-            "type": "text",
-            "x": 48.0,
-            "y": 48.0,
-            "width": 32.0,
-            "height": 32.0,
-            "fill": "none",
-            "stroke": "#00007f",
-            "lineWidth": 1.5,
-            "lineStyle": "none",
-            "text": "+",
-            "fontSize": 18.0,
-            "color": "#00007f"
-          }
-        ]
-      },
-      "properties": {
-        "showName": false
-      },
-      "library": {
-        "showSubtree": true
-      },
-      "implementation": {
-        "kind": "text",
-        "source": {
-          "equations": "out = sum(in[i] for i in 1:in.N);",
-          "parameters": []
-        }
-      }
-    }
-  ]
-}

BEdit/src/bedit/gui/application_log.py

@@ -0,0 +1,26 @@
+import logging
+
+from PySide6.QtCore import QObject, Signal
+from PySide6.QtWidgets import QPlainTextEdit
+
+
+class _LogEmitter(QObject):
+    lineReady = Signal(str)
+
+
+class ApplicationLogHandler(logging.Handler):
+    """Thread-safe bridge from Python logging into a Qt text view."""
+
+    def __init__(self, output: QPlainTextEdit) -> None:
+        super().__init__()
+        self.emitter = _LogEmitter(output)
+        self.emitter.lineReady.connect(output.appendPlainText)
+        self.setFormatter(
+            logging.Formatter("%(asctime)s  %(levelname)s  %(message)s", "%H:%M:%S")
+        )
+
+    def emit(self, record: logging.LogRecord) -> None:
+        try:
+            self.emitter.lineReady.emit(self.format(record))
+        except Exception:
+            self.handleError(record)

BEdit/src/bedit/gui/controllers/commands.py

@@ -137,6 +137,19 @@ class EditGraphItemCommand(QUndoCommand):
         self.controller._set_graph_item_data(self.owner_id, self.item_kind, self.item_id, self.old)
 
 
+class EditSimulationSettingsCommand(QUndoCommand):
+    def __init__(self, controller, owner_id: str, old: dict, new: dict) -> None:
+        super().__init__("Edit simulation settings")
+        self.controller, self.owner_id = controller, owner_id
+        self.old, self.new = old, new
+
+    def redo(self) -> None:
+        self.controller._set_simulation_settings(self.owner_id, self.new)
+
+    def undo(self) -> None:
+        self.controller._set_simulation_settings(self.owner_id, self.old)
+
+
 class DeleteAnnotationsCommand(QUndoCommand):
     def __init__(self, controller, owner_id: str, annotations: dict[str, Annotation]) -> None:
         super().__init__("Delete annotations")

BEdit/src/bedit/gui/controllers/document.py

@@ -13,6 +13,7 @@ from bedit.gui.controllers.commands import (
     DeleteSelectionCommand,
     DeleteAnnotationsCommand,
     EditGraphItemCommand,
+    EditSimulationSettingsCommand,
     EditTextDefinitionCommand,
     EditComponentAppearanceCommand,
     EditComponentPropertiesCommand,
@@ -37,8 +38,9 @@ from bedit.core.model import (
     Port,
     clone_component,
 )
+from bedit.core.simulation import Simulation
 from bedit.core.port_types import PortTypeRegistry
-from bedit.core.serializer import JsonDocumentSerializer
+from bedit.core.serializer import DocumentSerializer
 
 
 class DocumentController(QObject):
@@ -60,8 +62,9 @@ class DocumentController(QObject):
     filePathChanged = Signal(object)
     modifiedChanged = Signal(bool)
 
-    def __init__(self, parent=None) -> None:
+    def __init__(self, parent=None, *, simulation: Simulation | None = None) -> None:
         super().__init__(parent)
+        self.simulation = simulation or Simulation()
         self.document: GraphDocument | None = None
         self.active_component_id: str | None = None
         self.file_path: Path | None = None
@@ -105,7 +108,7 @@ class DocumentController(QObject):
         self.filePathChanged.emit(None)
 
     def load(self, path: Path) -> None:
-        self.document = JsonDocumentSerializer.load(path)
+        self.document = DocumentSerializer.load(path)
         self.active_component_id = next(iter(self.document.roots), None)
         self.file_path = path
         self.undo_stack.clear()
@@ -121,7 +124,7 @@ class DocumentController(QObject):
         target = path or self.file_path
         if target is None:
             raise ValueError("No file path has been selected")
-        JsonDocumentSerializer.save(self.document, target)
+        DocumentSerializer.save(self.document, target)
         self.file_path = target
         self.undo_stack.setClean()
         self.filePathChanged.emit(target)
@@ -378,6 +381,23 @@ class DocumentController(QObject):
         self.undo_stack.push(AddAnnotationCommand(self, self.active_component_id, annotation))
         return annotation.id
 
+    def edit_simulation_settings(self, settings: dict) -> None:
+        component = self.active_component
+        if component is None or component.implementation_kind != "graph":
+            raise ValueError("Open a graph component before editing simulation settings")
+        old = deepcopy(component.graph.simulation_settings)
+        new = deepcopy(settings)
+        if old != new:
+            self.undo_stack.push(
+                EditSimulationSettingsCommand(self, component.id, old, new)
+            )
+
+    def compile_active_graph(self) -> None:
+        component = self.active_component
+        if component is None or component.implementation_kind != "graph":
+            raise ValueError("Open a graph component before compiling")
+        self.simulation.compile(component.to_dict())
+
     def set_route_waypoints(self, item_kind: str, item_id: str, waypoints: list[QPointF]) -> None:
         item = (
             self.active_graph.connections
@@ -1032,6 +1052,12 @@ class DocumentController(QObject):
         if owner_id == self.active_component_id:
             self.graphItemChanged.emit(item_kind, item_id)
 
+    def _set_simulation_settings(self, owner_id: str, settings: dict) -> None:
+        owner = self.document.find_component(owner_id) if self.document else None
+        if owner is not None and owner.implementation_kind == "graph":
+            owner.graph.simulation_settings = deepcopy(settings)
+            self.documentReset.emit()
+
     def _replace_component(self, old_id: str, replacement: Component) -> None:
         if self.document is None:
             return

BEdit/src/bedit/gui/dialogs/settings.py

@@ -3,7 +3,7 @@ from pathlib import Path
 from PySide6.QtCore import QSettings, Signal
 from PySide6.QtWidgets import QDialog, QFileDialog
 
-from bedit.core.libraries import default_library_paths
+from bedit.core.libraries import bundled_library_path, default_library_paths
 from bedit.gui.preferences import application_settings
 from bedit.gui.generated.ui_settings_dialog import Ui_SettingsDialog
 
@@ -56,8 +56,22 @@ class SettingsDialog(QDialog):
         settings = settings if settings is not None else application_settings()
         value = settings.value("libraries/paths", default_library_paths())
         if isinstance(value, str):
-            return [value]
+            paths = [value]
-        return [str(path) for path in value]
+        else:
+            paths = [str(path) for path in value]
+        bundled = bundled_library_path()
+        migrated = [
+            str(bundled)
+            if not Path(path).exists()
+            and Path(path).parent == bundled.parent
+            and Path(path).suffix.lower() == ".json"
+            else path
+            for path in paths
+        ]
+        if migrated != paths:
+            settings.setValue("libraries/paths", migrated)
+            settings.sync()
+        return migrated
 
     @staticmethod
     def graph_grid_size(settings: QSettings | None = None) -> int:
@@ -79,7 +93,7 @@ class SettingsDialog(QDialog):
             self,
             "Add library",
             "",
-            "BEdit libraries (*.json);;All files (*)",
+            "BEdit libraries (*.beb *.bedit.json *.json);;All files (*)",
         )
         if path:
             self._append_unique_path(path)

BEdit/src/bedit/gui/dialogs/simulation_settings.py

@@ -0,0 +1,22 @@
+from copy import deepcopy
+
+from PySide6.QtWidgets import QDialog
+
+from bedit.gui.generated.ui_simulation_settings_dialog import Ui_SimulationSettingsDialog
+
+
+class SimulationSettingsDialog(QDialog):
+    def __init__(self, settings: dict, parent=None) -> None:
+        super().__init__(parent)
+        self.ui = Ui_SimulationSettingsDialog()
+        self.ui.setupUi(self)
+        self._settings = deepcopy(settings)
+        self.ui.placeholderCheckBox.setChecked(
+            bool(self._settings.get("enabled", False))
+        )
+
+    @property
+    def settings(self) -> dict:
+        values = deepcopy(self._settings)
+        values["enabled"] = self.ui.placeholderCheckBox.isChecked()
+        return values

BEdit/src/bedit/gui/generated/resources_rc.py

@@ -215,6 +215,129 @@ ff\xa6\x5cP`\xb7\xadY\x1b\xde\x8b\xcb\x97/\xc3\
 \x80\x90\x84\xfe\x83\xfe\x0fl\x00\x00/\xbf\xf2\xf2\x7f\x9c\
 \xfd\x0bVu/\x8d\xbcS'\xfc\x00\x00\x00\x00IE\
 ND\xaeB`\x82\
+\x00\x00\x07\x88\
+\x89\
+PNG\x0d\x0a\x1a\x0a\x00\x00\x00\x0dIHDR\x00\
+\x00\x00 \x00\x00\x00 \x08\x06\x00\x00\x00szz\xf4\
+\x00\x00\x00\x01sRGB\x00\xae\xce\x1c\xe9\x00\x00\x00\
+\x09pHYs\x00\x00\x0d\xd7\x00\x00\x0d\xd7\x01B(\
+\x9bx\x00\x00\x00\x07tIME\x07\xd9\x08\x0b\x00-\
+\x1f\xb3\xb6|\x9d\x00\x00\x00\x06bKGD\x00\xff\x00\
+\xff\x00\xff\xa0\xbd\xa7\x93\x00\x00\x07\x08IDATx\
+\xda\xbdWiLTW\x18\x95\xda\xa0P1]b\x89\
+\x0a.EQ\xdcj\x5c\xd3FcMj\xda\xa4I-\
+?J4\xc4(1\xadMl\xd5\x22*h,\x88K\
+\xd0b+\xa6\x15Y\x0dV\x94\x08U\x16A\x10\x18`\
+f`\x18\x96a\x1f\x86a\xd8\x94}\x11T\x90\xa0v\
+N\xefy\x99\x99L\xa8\x88&\xd6\x97|\xb9\xf7\xdd\xf7\
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+\xcf\xc5\xaa\xaa\xaa\x7f\xe1&\x92Q\xb9,\xa3\x9d\xa6\xb6\
+\x06s\xb2\xd6cG\xe8\xfb'}{\xa3~\xc9\x02\xc2\
+t\x82\x11a\x13a)a\xb2L\xcae'!\xc7]\
+\xc91\xb0?\xfc\x17\xb0l\xc1\xc4\x9c\xd3\xd1\xfc\x00\x00\
+\x00\x00IEND\xaeB`\x82\
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 \x89\
 PNG\x0d\x0a\x1a\x0a\x00\x00\x00\x0dIHDR\x00\
@@ -2271,6 +2532,10 @@ qt_resource_name = b"\
 \x00z\
 \x00o\x00o\x00m\x00-\x00o\x00r\x00i\x00g\x00i\x00n\x00a\x00l\x00.\x00p\x00n\x00g\
 \
+\x00\x0d\
+\x0f\xa5%\xc7\
+\x00r\
+\x00u\x00n\x00-\x00b\x00u\x00i\x00l\x00d\x00.\x00p\x00n\x00g\
 \x00\x0f\
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@@ -2327,6 +2592,11 @@ qt_resource_name = b"\
 \x00e\
 \x00d\x00i\x00t\x00-\x00r\x00e\x00d\x00o\x00.\x00p\x00n\x00g\
 \x00\x16\
+\x01p\xe1\x87\
+\x00p\
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+\x00\x16\
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 \x00r\x00a\x00w\x00-\x00b\x00e\x00z\x00i\x00e\x00r\x00-\x00c\x00u\x00r\x00v\x00e\
@@ -2383,59 +2653,63 @@ qt_resource_struct = b"\
 \x00\x00\x00\x00\x00\x00\x00\x00\
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 "
 

BEdit/src/bedit/gui/generated/ui_main_window.py

@@ -18,9 +18,9 @@ from PySide6.QtGui import (QAction, QBrush, QColor, QConicalGradient,
     QTransform)
 from PySide6.QtWidgets import (QApplication, QDockWidget, QFrame, QHBoxLayout,
     QHeaderView, QLabel, QMainWindow, QMenu,
-    QMenuBar, QSizePolicy, QSpacerItem, QSplitter,
+    QMenuBar, QPlainTextEdit, QSizePolicy, QSpacerItem,
-    QStackedWidget, QToolBar, QToolButton, QTreeView,
+    QSplitter, QStackedWidget, QTabWidget, QToolBar,
-    QVBoxLayout, QWidget)
+    QToolButton, QTreeView, QVBoxLayout, QWidget)
 
 from bedit.gui.editors.text_definition import TextDefinitionEditor
 from bedit.gui.graphics.workspace import GraphWorkspaceView
@@ -31,77 +31,87 @@ class Ui_MainWindow(object):
         if not MainWindow.objectName():
             MainWindow.setObjectName(u"MainWindow")
         MainWindow.resize(1209, 777)
+        self.actionSimulationSettings = QAction(MainWindow)
+        self.actionSimulationSettings.setObjectName(u"actionSimulationSettings")
+        icon = QIcon()
+        icon.addFile(u":/icons/icons/preferences-system.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionSimulationSettings.setIcon(icon)
+        self.actionCompile = QAction(MainWindow)
+        self.actionCompile.setObjectName(u"actionCompile")
+        icon1 = QIcon()
+        icon1.addFile(u":/icons/icons/run-build.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        self.actionCompile.setIcon(icon1)
         self.actionNew = QAction(MainWindow)
         self.actionNew.setObjectName(u"actionNew")
-        icon = QIcon()
+        icon2 = QIcon()
-        icon.addFile(u":/icons/icons/document-new.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon2.addFile(u":/icons/icons/document-new.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionNew.setIcon(icon)
+        self.actionNew.setIcon(icon2)
         self.actionRotateClockwise = QAction(MainWindow)
         self.actionRotateClockwise.setObjectName(u"actionRotateClockwise")
-        icon1 = QIcon()
+        icon3 = QIcon()
-        icon1.addFile(u":/icons/icons/transform-rotate.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon3.addFile(u":/icons/icons/transform-rotate.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionRotateClockwise.setIcon(icon1)
+        self.actionRotateClockwise.setIcon(icon3)
         self.actionZoomIn = QAction(MainWindow)
         self.actionZoomIn.setObjectName(u"actionZoomIn")
-        icon2 = QIcon()
+        icon4 = QIcon()
-        icon2.addFile(u":/icons/icons/zoom-in.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon4.addFile(u":/icons/icons/zoom-in.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionZoomIn.setIcon(icon2)
+        self.actionZoomIn.setIcon(icon4)
         self.actionZoomOut = QAction(MainWindow)
         self.actionZoomOut.setObjectName(u"actionZoomOut")
-        icon3 = QIcon()
+        icon5 = QIcon()
-        icon3.addFile(u":/icons/icons/zoom-out.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon5.addFile(u":/icons/icons/zoom-out.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionZoomOut.setIcon(icon3)
+        self.actionZoomOut.setIcon(icon5)
         self.actionCenterView = QAction(MainWindow)
         self.actionCenterView.setObjectName(u"actionCenterView")
-        icon4 = QIcon()
+        icon6 = QIcon()
-        icon4.addFile(u":/icons/icons/zoom-original.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon6.addFile(u":/icons/icons/zoom-original.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionCenterView.setIcon(icon4)
+        self.actionCenterView.setIcon(icon6)
         self.actionOpen = QAction(MainWindow)
         self.actionOpen.setObjectName(u"actionOpen")
-        icon5 = QIcon()
+        icon7 = QIcon()
-        icon5.addFile(u":/icons/icons/document-open.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon7.addFile(u":/icons/icons/document-open.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionOpen.setIcon(icon5)
+        self.actionOpen.setIcon(icon7)
         self.actionReloadLibraries = QAction(MainWindow)
         self.actionReloadLibraries.setObjectName(u"actionReloadLibraries")
         self.actionSave = QAction(MainWindow)
         self.actionSave.setObjectName(u"actionSave")
-        icon6 = QIcon()
+        icon8 = QIcon()
-        icon6.addFile(u":/icons/icons/document-save.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon8.addFile(u":/icons/icons/document-save.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionSave.setIcon(icon6)
+        self.actionSave.setIcon(icon8)
         self.actionSaveAs = QAction(MainWindow)
         self.actionSaveAs.setObjectName(u"actionSaveAs")
-        icon7 = QIcon()
+        icon9 = QIcon()
-        icon7.addFile(u":/icons/icons/document-save-as.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon9.addFile(u":/icons/icons/document-save-as.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionSaveAs.setIcon(icon7)
+        self.actionSaveAs.setIcon(icon9)
         self.actionExit = QAction(MainWindow)
         self.actionExit.setObjectName(u"actionExit")
         self.actionClose = QAction(MainWindow)
         self.actionClose.setObjectName(u"actionClose")
         self.actionUndo = QAction(MainWindow)
         self.actionUndo.setObjectName(u"actionUndo")
-        icon8 = QIcon()
+        icon10 = QIcon()
-        icon8.addFile(u":/icons/icons/edit-undo.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon10.addFile(u":/icons/icons/edit-undo.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionUndo.setIcon(icon8)
+        self.actionUndo.setIcon(icon10)
         self.actionRedo = QAction(MainWindow)
         self.actionRedo.setObjectName(u"actionRedo")
-        icon9 = QIcon()
+        icon11 = QIcon()
-        icon9.addFile(u":/icons/icons/edit-redo.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon11.addFile(u":/icons/icons/edit-redo.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionRedo.setIcon(icon9)
+        self.actionRedo.setIcon(icon11)
         self.actionCut = QAction(MainWindow)
         self.actionCut.setObjectName(u"actionCut")
-        icon10 = QIcon()
+        icon12 = QIcon()
-        icon10.addFile(u":/icons/icons/edit-cut.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon12.addFile(u":/icons/icons/edit-cut.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionCut.setIcon(icon10)
+        self.actionCut.setIcon(icon12)
         self.actionCopy = QAction(MainWindow)
         self.actionCopy.setObjectName(u"actionCopy")
-        icon11 = QIcon()
+        icon13 = QIcon()
-        icon11.addFile(u":/icons/icons/edit-copy.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon13.addFile(u":/icons/icons/edit-copy.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionCopy.setIcon(icon11)
+        self.actionCopy.setIcon(icon13)
         self.actionPaste = QAction(MainWindow)
         self.actionPaste.setObjectName(u"actionPaste")
-        icon12 = QIcon()
+        icon14 = QIcon()
-        icon12.addFile(u":/icons/icons/edit-paste.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon14.addFile(u":/icons/icons/edit-paste.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.actionPaste.setIcon(icon12)
+        self.actionPaste.setIcon(icon14)
         self.actionSelectAll = QAction(MainWindow)
         self.actionSelectAll.setObjectName(u"actionSelectAll")
         self.actionDelete = QAction(MainWindow)
@@ -191,18 +201,18 @@ class Ui_MainWindow(object):
         self.workspaceHeaderLayout.setContentsMargins(6, 2, 6, 2)
         self.navigateUpButton = QToolButton(self.workspaceHeader)
         self.navigateUpButton.setObjectName(u"navigateUpButton")
-        icon13 = QIcon()
+        icon15 = QIcon()
-        icon13.addFile(u":/icons/icons/arrow-up.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon15.addFile(u":/icons/icons/arrow-up.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.navigateUpButton.setIcon(icon13)
+        self.navigateUpButton.setIcon(icon15)
 
         self.workspaceHeaderLayout.addWidget(self.navigateUpButton)
 
         self.navigateDownButton = QToolButton(self.workspaceHeader)
         self.navigateDownButton.setObjectName(u"navigateDownButton")
         self.navigateDownButton.setEnabled(False)
-        icon14 = QIcon()
+        icon16 = QIcon()
-        icon14.addFile(u":/icons/icons/arrow-down.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon16.addFile(u":/icons/icons/arrow-down.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.navigateDownButton.setIcon(icon14)
+        self.navigateDownButton.setIcon(icon16)
 
         self.workspaceHeaderLayout.addWidget(self.navigateDownButton)
 
@@ -222,9 +232,9 @@ class Ui_MainWindow(object):
 
         self.pointerToolButton = QToolButton(self.workspaceHeader)
         self.pointerToolButton.setObjectName(u"pointerToolButton")
-        icon15 = QIcon()
+        icon17 = QIcon()
-        icon15.addFile(u":/icons/icons/edit-select.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon17.addFile(u":/icons/icons/edit-select.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.pointerToolButton.setIcon(icon15)
+        self.pointerToolButton.setIcon(icon17)
         self.pointerToolButton.setCheckable(True)
         self.pointerToolButton.setChecked(True)
 
@@ -232,50 +242,54 @@ class Ui_MainWindow(object):
 
         self.connectToolButton = QToolButton(self.workspaceHeader)
         self.connectToolButton.setObjectName(u"connectToolButton")
-        icon16 = QIcon()
+        icon18 = QIcon()
-        icon16.addFile(u":/icons/icons/network-connect.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon18.addFile(u":/icons/icons/network-connect.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.connectToolButton.setIcon(icon16)
+        self.connectToolButton.setIcon(icon18)
         self.connectToolButton.setCheckable(True)
 
         self.workspaceHeaderLayout.addWidget(self.connectToolButton)
 
         self.boxToolButton = QToolButton(self.workspaceHeader)
         self.boxToolButton.setObjectName(u"boxToolButton")
-        icon17 = QIcon()
+        icon19 = QIcon()
-        icon17.addFile(u":/icons/icons/draw-rectangle.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon19.addFile(u":/icons/icons/draw-rectangle.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.boxToolButton.setIcon(icon17)
+        self.boxToolButton.setIcon(icon19)
         self.boxToolButton.setCheckable(True)
 
         self.workspaceHeaderLayout.addWidget(self.boxToolButton)
 
         self.lineToolButton = QToolButton(self.workspaceHeader)
         self.lineToolButton.setObjectName(u"lineToolButton")
-        icon18 = QIcon()
+        icon20 = QIcon()
-        icon18.addFile(u":/icons/icons/draw-bezier-curves.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon20.addFile(u":/icons/icons/draw-bezier-curves.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.lineToolButton.setIcon(icon18)
+        self.lineToolButton.setIcon(icon20)
         self.lineToolButton.setCheckable(True)
 
         self.workspaceHeaderLayout.addWidget(self.lineToolButton)
 
         self.textToolButton = QToolButton(self.workspaceHeader)
         self.textToolButton.setObjectName(u"textToolButton")
-        icon19 = QIcon()
+        icon21 = QIcon()
-        icon19.addFile(u":/icons/icons/draw-text.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
+        icon21.addFile(u":/icons/icons/draw-text.png", QSize(), QIcon.Mode.Normal, QIcon.State.Off)
-        self.textToolButton.setIcon(icon19)
+        self.textToolButton.setIcon(icon21)
         self.textToolButton.setCheckable(True)
 
         self.workspaceHeaderLayout.addWidget(self.textToolButton)
 
         self.rotateToolButton = QToolButton(self.workspaceHeader)
         self.rotateToolButton.setObjectName(u"rotateToolButton")
-        self.rotateToolButton.setIcon(icon1)
+        self.rotateToolButton.setIcon(icon3)
 
         self.workspaceHeaderLayout.addWidget(self.rotateToolButton)
 
 
         self.workspaceEditorLayout.addWidget(self.workspaceHeader)
 
-        self.workspaceStack = QStackedWidget(self.workspace)
+        self.workspaceVerticalSplitter = QSplitter(self.workspace)
+        self.workspaceVerticalSplitter.setObjectName(u"workspaceVerticalSplitter")
+        self.workspaceVerticalSplitter.setOrientation(Qt.Orientation.Vertical)
+        self.workspaceVerticalSplitter.setChildrenCollapsible(False)
+        self.workspaceStack = QStackedWidget(self.workspaceVerticalSplitter)
         self.workspaceStack.setObjectName(u"workspaceStack")
         self.graphPage = QWidget()
         self.graphPage.setObjectName(u"graphPage")
@@ -312,8 +326,26 @@ class Ui_MainWindow(object):
         self.emptyPageLayout.addWidget(self.emptyWorkspaceLabel)
 
         self.workspaceStack.addWidget(self.emptyPage)
+        self.workspaceVerticalSplitter.addWidget(self.workspaceStack)
+        self.outputTabs = QTabWidget(self.workspaceVerticalSplitter)
+        self.outputTabs.setObjectName(u"outputTabs")
+        self.outputTabs.setMinimumSize(QSize(0, 100))
+        self.logTab = QWidget()
+        self.logTab.setObjectName(u"logTab")
+        self.logTabLayout = QVBoxLayout(self.logTab)
+        self.logTabLayout.setObjectName(u"logTabLayout")
+        self.logTabLayout.setContentsMargins(0, 0, 0, 0)
+        self.logOutput = QPlainTextEdit(self.logTab)
+        self.logOutput.setObjectName(u"logOutput")
+        self.logOutput.setReadOnly(True)
+        self.logOutput.setMaximumBlockCount(5000)
 
-        self.workspaceEditorLayout.addWidget(self.workspaceStack)
+        self.logTabLayout.addWidget(self.logOutput)
+
+        self.outputTabs.addTab(self.logTab, "")
+        self.workspaceVerticalSplitter.addWidget(self.outputTabs)
+
+        self.workspaceEditorLayout.addWidget(self.workspaceVerticalSplitter)
 
         self.workspaceSplitter.addWidget(self.workspace)
 
@@ -353,6 +385,10 @@ class Ui_MainWindow(object):
         self.cameraToolbar = QToolBar(MainWindow)
         self.cameraToolbar.setObjectName(u"cameraToolbar")
         MainWindow.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.cameraToolbar)
+        self.simulationToolbar = QToolBar(MainWindow)
+        self.simulationToolbar.setObjectName(u"simulationToolbar")
+        self.simulationToolbar.setToolButtonStyle(Qt.ToolButtonStyle.ToolButtonIconOnly)
+        MainWindow.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.simulationToolbar)
 
         self.menubar.addAction(self.menuFile.menuAction())
         self.menubar.addAction(self.menuEdit.menuAction())
@@ -393,6 +429,8 @@ class Ui_MainWindow(object):
         self.cameraToolbar.addAction(self.actionZoomIn)
         self.cameraToolbar.addAction(self.actionZoomOut)
         self.cameraToolbar.addAction(self.actionCenterView)
+        self.simulationToolbar.addAction(self.actionSimulationSettings)
+        self.simulationToolbar.addAction(self.actionCompile)
 
         self.retranslateUi(MainWindow)
 
@@ -404,6 +442,14 @@ class Ui_MainWindow(object):
 
     def retranslateUi(self, MainWindow):
         MainWindow.setWindowTitle(QCoreApplication.translate("MainWindow", u"BEdit", None))
+        self.actionSimulationSettings.setText(QCoreApplication.translate("MainWindow", u"Simulation Settings", None))
+#if QT_CONFIG(statustip)
+        self.actionSimulationSettings.setStatusTip(QCoreApplication.translate("MainWindow", u"Edit settings stored in the active graph", None))
+#endif // QT_CONFIG(statustip)
+        self.actionCompile.setText(QCoreApplication.translate("MainWindow", u"Compile", None))
+#if QT_CONFIG(statustip)
+        self.actionCompile.setStatusTip(QCoreApplication.translate("MainWindow", u"Compile the active graph for simulation", None))
+#endif // QT_CONFIG(statustip)
         self.actionNew.setText(QCoreApplication.translate("MainWindow", u"&New", None))
 #if QT_CONFIG(statustip)
         self.actionNew.setStatusTip(QCoreApplication.translate("MainWindow", u"Create a new document", None))
@@ -528,6 +574,8 @@ class Ui_MainWindow(object):
 #endif // QT_CONFIG(tooltip)
         self.rotateToolButton.setText(QCoreApplication.translate("MainWindow", u"Rotate", None))
         self.emptyWorkspaceLabel.setText(QCoreApplication.translate("MainWindow", u"No document open", None))
+        self.logOutput.setPlaceholderText(QCoreApplication.translate("MainWindow", u"Application messages appear here.", None))
+        self.outputTabs.setTabText(self.outputTabs.indexOf(self.logTab), QCoreApplication.translate("MainWindow", u"Log", None))
         self.menuFile.setTitle(QCoreApplication.translate("MainWindow", u"&File", None))
         self.menuEdit.setTitle(QCoreApplication.translate("MainWindow", u"&Edit", None))
         self.menuView.setTitle(QCoreApplication.translate("MainWindow", u"&View", None))
@@ -537,5 +585,6 @@ class Ui_MainWindow(object):
         self.fileToolbar.setWindowTitle(QCoreApplication.translate("MainWindow", u"File", None))
         self.editToolbar.setWindowTitle(QCoreApplication.translate("MainWindow", u"Edit", None))
         self.cameraToolbar.setWindowTitle(QCoreApplication.translate("MainWindow", u"Camera", None))
+        self.simulationToolbar.setWindowTitle(QCoreApplication.translate("MainWindow", u"Simulation", None))
     # retranslateUi
 

BEdit/src/bedit/gui/generated/ui_settings_dialog.py

@@ -176,7 +176,7 @@ class Ui_SettingsDialog(object):
         self.iconGridLabel.setText(QCoreApplication.translate("SettingsDialog", u"Icon grid size:", None))
         self.iconGridSpinBox.setSuffix(QCoreApplication.translate("SettingsDialog", u" units", None))
         self.settingsTabs.setTabText(self.settingsTabs.indexOf(self.generalTab), QCoreApplication.translate("SettingsDialog", u"General", None))
-        self.libraryPathsLabel.setText(QCoreApplication.translate("SettingsDialog", u"Load library JSON files from these files or folders at startup:", None))
+        self.libraryPathsLabel.setText(QCoreApplication.translate("SettingsDialog", u"Load library JSON or BEdit Binary files from these files or folders at startup:", None))
         self.addLibraryFileButton.setText(QCoreApplication.translate("SettingsDialog", u"Add File\u2026", None))
         self.addLibraryFolderButton.setText(QCoreApplication.translate("SettingsDialog", u"Add Folder\u2026", None))
         self.removeLibraryPathButton.setText(QCoreApplication.translate("SettingsDialog", u"Remove", None))

BEdit/src/bedit/gui/generated/ui_simulation_settings_dialog.py

@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+
+################################################################################
+## Form generated from reading UI file 'simulation_settings_dialog.ui'
+##
+## Created by: Qt User Interface Compiler version 6.11.1
+##
+## WARNING! All changes made in this file will be lost when recompiling UI file!
+################################################################################
+
+from PySide6.QtCore import (QCoreApplication, QDate, QDateTime, QLocale,
+    QMetaObject, QObject, QPoint, QRect,
+    QSize, QTime, QUrl, Qt)
+from PySide6.QtGui import (QBrush, QColor, QConicalGradient, QCursor,
+    QFont, QFontDatabase, QGradient, QIcon,
+    QImage, QKeySequence, QLinearGradient, QPainter,
+    QPalette, QPixmap, QRadialGradient, QTransform)
+from PySide6.QtWidgets import (QAbstractButton, QApplication, QCheckBox, QDialog,
+    QDialogButtonBox, QGroupBox, QSizePolicy, QSpacerItem,
+    QVBoxLayout, QWidget)
+
+class Ui_SimulationSettingsDialog(object):
+    def setupUi(self, SimulationSettingsDialog):
+        if not SimulationSettingsDialog.objectName():
+            SimulationSettingsDialog.setObjectName(u"SimulationSettingsDialog")
+        SimulationSettingsDialog.resize(420, 180)
+        self.dialogLayout = QVBoxLayout(SimulationSettingsDialog)
+        self.dialogLayout.setObjectName(u"dialogLayout")
+        self.settingsGroup = QGroupBox(SimulationSettingsDialog)
+        self.settingsGroup.setObjectName(u"settingsGroup")
+        self.settingsLayout = QVBoxLayout(self.settingsGroup)
+        self.settingsLayout.setObjectName(u"settingsLayout")
+        self.placeholderCheckBox = QCheckBox(self.settingsGroup)
+        self.placeholderCheckBox.setObjectName(u"placeholderCheckBox")
+
+        self.settingsLayout.addWidget(self.placeholderCheckBox)
+
+        self.settingsSpacer = QSpacerItem(20, 40, QSizePolicy.Policy.Minimum, QSizePolicy.Policy.Expanding)
+
+        self.settingsLayout.addItem(self.settingsSpacer)
+
+
+        self.dialogLayout.addWidget(self.settingsGroup)
+
+        self.buttonBox = QDialogButtonBox(SimulationSettingsDialog)
+        self.buttonBox.setObjectName(u"buttonBox")
+        self.buttonBox.setStandardButtons(QDialogButtonBox.StandardButton.Cancel|QDialogButtonBox.StandardButton.Ok)
+
+        self.dialogLayout.addWidget(self.buttonBox)
+
+
+        self.retranslateUi(SimulationSettingsDialog)
+        self.buttonBox.accepted.connect(SimulationSettingsDialog.accept)
+        self.buttonBox.rejected.connect(SimulationSettingsDialog.reject)
+
+        QMetaObject.connectSlotsByName(SimulationSettingsDialog)
+    # setupUi
+
+    def retranslateUi(self, SimulationSettingsDialog):
+        SimulationSettingsDialog.setWindowTitle(QCoreApplication.translate("SimulationSettingsDialog", u"Simulation Settings", None))
+        self.settingsGroup.setTitle(QCoreApplication.translate("SimulationSettingsDialog", u"Settings", None))
+        self.placeholderCheckBox.setText(QCoreApplication.translate("SimulationSettingsDialog", u"Enable simulation option", None))
+    # retranslateUi
+

BEdit/src/bedit/gui/main_window.py

@@ -13,7 +13,9 @@ from PySide6.QtWidgets import (
 )
 
 from bedit.core.model import Component, Parameter
-from bedit.core.serializer import JsonDocumentSerializer
+from bedit.core.application_log import get_logger
+from bedit.core.serializer import DocumentSerializer
+from bedit.core.simulation import Simulation
 from bedit.gui.controllers.document import DocumentController
 from bedit.gui.dialogs.component_options import ComponentOptionsDialog
 from bedit.gui.dialogs.item_options import ItemOptionsDialog
@@ -27,8 +29,10 @@ from bedit.gui.models.library_tree import (
 )
 from bedit.gui.dialogs.settings import SettingsDialog
 from bedit.gui.dialogs.port_options import PortOptionsDialog
+from bedit.gui.dialogs.simulation_settings import SimulationSettingsDialog
 from bedit.gui.preferences import application_settings
 from bedit.gui.generated.ui_main_window import Ui_MainWindow
+from bedit.gui.application_log import ApplicationLogHandler
 
 
 class MainWindow(QMainWindow):
@@ -38,11 +42,19 @@ class MainWindow(QMainWindow):
         super().__init__()
         self.ui = Ui_MainWindow()
         self.ui.setupUi(self)
+        self.application_logger = get_logger()
+        self.log = get_logger("ui")
+        self.log_handler = ApplicationLogHandler(self.ui.logOutput)
+        self.application_logger.addHandler(self.log_handler)
+        self.application_logger.setLevel("INFO")
+        self.ui.workspaceVerticalSplitter.setSizes([580, 160])
+        self.log.info("BEdit started")
         self.settings = application_settings()
         self._applying_text_definition = False
 
         self.libraries = LibraryRepository(self)
-        self.document_controller = DocumentController(self)
+        self.simulation = Simulation()
+        self.document_controller = DocumentController(self, simulation=self.simulation)
         self.library_tree_model = LibraryTreeModel(
             self.libraries,
             self.document_controller,
@@ -141,6 +153,10 @@ class MainWindow(QMainWindow):
         self.ui.actionZoomIn.triggered.connect(self.ui.graphView.zoom_in)
         self.ui.actionZoomOut.triggered.connect(self.ui.graphView.zoom_out)
         self.ui.actionCenterView.triggered.connect(self.ui.graphView.center_workspace)
+        self.ui.actionSimulationSettings.triggered.connect(
+            self.show_simulation_settings
+        )
+        self.ui.actionCompile.triggered.connect(self.compile_active_graph)
         self.document_controller.undo_stack.canUndoChanged.connect(self.ui.actionUndo.setEnabled)
         self.document_controller.undo_stack.canRedoChanged.connect(self.ui.actionRedo.setEnabled)
         self.document_controller.modifiedChanged.connect(lambda _modified: self._update_title())
@@ -158,19 +174,40 @@ class MainWindow(QMainWindow):
             self.ui.fileToolbar,
             self.ui.editToolbar,
             self.ui.cameraToolbar,
+            self.ui.simulationToolbar,
         ):
             self.ui.menuToolbars.addAction(toolbar.toggleViewAction())
 
     def reload_libraries(self) -> None:
         self.libraries.load_paths(SettingsDialog.library_paths(self.settings))
         self.ui.treeView.expandAll()
+        self.log.info("Reloaded %d libraries", len(self.libraries.libraries))
         if self.libraries.load_warnings:
+            for warning in self.libraries.load_warnings:
+                self.log.warning("Library load failed: %s", warning)
             QMessageBox.warning(
                 self,
                 "Some libraries could not be loaded",
                 "\n".join(self.libraries.load_warnings),
             )
 
+    @Slot()
+    def show_simulation_settings(self) -> None:
+        component = self.document_controller.active_component
+        if component is None or component.implementation_kind != "graph":
+            return
+        dialog = SimulationSettingsDialog(component.graph.simulation_settings, self)
+        if dialog.exec() == dialog.DialogCode.Accepted:
+            self.document_controller.edit_simulation_settings(dialog.settings)
+
+    @Slot()
+    def compile_active_graph(self) -> None:
+        try:
+            self.document_controller.compile_active_graph()
+        except ValueError as error:
+            self.log.error("Compile failed: %s", error)
+            QMessageBox.warning(self, "Cannot compile", str(error))
+
     def _restore_window_geometry(self) -> None:
         geometry = self.settings.value("window/geometry")
         if geometry is not None:
@@ -196,6 +233,8 @@ class MainWindow(QMainWindow):
             self.ui.workspaceModeLabel.setText("")
             self.ui.workspaceStack.setCurrentWidget(self.ui.emptyPage)
             self._set_graph_controls_visible(False)
+            self.ui.actionSimulationSettings.setEnabled(False)
+            self.ui.actionCompile.setEnabled(False)
             self._update_edit_actions()
             return
         self.ui.graphBreadcrumbLabel.setText(" › ".join(self.document_controller.breadcrumb()))
@@ -203,6 +242,8 @@ class MainWindow(QMainWindow):
             self.document_controller.document.find_parent(component.id) is not None
         )
         is_graph = component.implementation_kind == "graph"
+        self.ui.actionSimulationSettings.setEnabled(is_graph)
+        self.ui.actionCompile.setEnabled(is_graph)
         self.ui.workspaceModeLabel.setText("Graph" if is_graph else "Text")
         self.ui.workspaceStack.setCurrentWidget(
             self.ui.graphPage if is_graph else self.ui.textPage
@@ -314,6 +355,7 @@ class MainWindow(QMainWindow):
             finally:
                 self._applying_text_definition = False
         except (TypeError, ValueError) as error:
+            self.log.error("Text component update failed: %s", error)
             QMessageBox.critical(self, "Invalid text component", str(error))
             self._load_text_definition()
             return False
@@ -351,24 +393,33 @@ class MainWindow(QMainWindow):
     def new_document(self) -> None:
         if self._resolve_source_edits() and self._maybe_save():
             self.document_controller.new_document()
+            self.log.info("Created a new document")
 
     @Slot()
     def close_document(self) -> None:
         if self._resolve_source_edits() and self._maybe_save():
+            path = self.document_controller.file_path
             self.document_controller.close_document()
+            self.log.info("Closed document%s", f" {path}" if path else "")
 
     @Slot()
     def open_document(self) -> None:
         if not self._resolve_source_edits() or not self._maybe_save():
             return
         filename, _ = QFileDialog.getOpenFileName(
-            self, "Open graph", "", "BEdit graphs (*.bedit.json *.json);;All files (*)"
+            self,
+            "Open graph",
+            "",
+            "BEdit documents (*.bedit.json *.json *.beb);;"
+            "BEdit JSON (*.bedit.json *.json);;BEdit Binary (*.beb);;All files (*)",
         )
         if not filename:
             return
         try:
             self.document_controller.load(Path(filename))
+            self.log.info("Opened document %s", filename)
         except (OSError, ValueError) as error:
+            self.log.error("Could not open document %s: %s", filename, error)
             QMessageBox.critical(self, "Could not open graph", str(error))
 
     @Slot()
@@ -378,8 +429,10 @@ class MainWindow(QMainWindow):
         if self.document_controller.file_path is None:
             return self.save_document_as()
         try:
-            self.document_controller.save()
+            path = self.document_controller.save()
+            self.log.info("Saved document %s", path)
         except OSError as error:
+            self.log.error("Could not save document: %s", error)
             QMessageBox.critical(self, "Could not save graph", str(error))
             return False
         return True
@@ -388,17 +441,24 @@ class MainWindow(QMainWindow):
     def save_document_as(self) -> bool:
         if self.document_controller.document is None:
             return False
-        filename, _ = QFileDialog.getSaveFileName(
+        filename, selected_filter = QFileDialog.getSaveFileName(
             self,
             "Save graph",
-            "untitled.bedit.json",
+            "untitled.beb",
-            "BEdit graphs (*.bedit.json);;JSON files (*.json);;All files (*)",
+            "BEdit Binary (*.beb);;BEdit JSON (*.bedit.json *.json);;All files (*)",
         )
         if not filename:
             return False
+        path = Path(filename)
+        if path.suffix.lower() not in {".json", ".beb"}:
+            path = path.with_suffix(
+                ".beb" if "Binary" in selected_filter else ".bedit.json"
+            )
         try:
-            self.document_controller.save(Path(filename))
+            path = self.document_controller.save(path)
+            self.log.info("Saved document %s", path)
         except OSError as error:
+            self.log.error("Could not save document %s: %s", filename, error)
             QMessageBox.critical(self, "Could not save graph", str(error))
             return False
         return True
@@ -506,9 +566,10 @@ class MainWindow(QMainWindow):
                 try:
                     if library is not None:
                         library.document.validate()
-                        JsonDocumentSerializer.save(library.document, Path(library.source_path))
+                        DocumentSerializer.save(library.document, Path(library.source_path))
                 except (OSError, ValueError) as error:
                     component.inputs, component.outputs = old_inputs, old_outputs
+                    self.log.error("Could not change library ports: %s", error)
                     QMessageBox.warning(self, "Cannot change library ports", str(error))
                 self.library_tree_model.rebuild()
 
@@ -526,6 +587,7 @@ class MainWindow(QMainWindow):
                 component_id, dialog.inputs, dialog.outputs
             )
         except ValueError as error:
+            self.log.error("Could not change component ports: %s", error)
             QMessageBox.warning(self, "Cannot change ports", str(error))
 
     @Slot(str)
@@ -547,6 +609,7 @@ class MainWindow(QMainWindow):
                     dialog.ui.showNameCheckBox.isChecked(),
                 )
             except ValueError as error:
+                self.log.error("Could not rename component: %s", error)
                 QMessageBox.warning(self, "Cannot rename component", str(error))
 
     @Slot(str, str)
@@ -595,4 +658,6 @@ class MainWindow(QMainWindow):
             event.ignore()
             return
         self.settings.setValue("window/geometry", self.saveGeometry())
+        self.log.info("BEdit closed")
+        self.application_logger.removeHandler(self.log_handler)
         event.accept()

BEdit/src/bedit/gui/models/library_repository.py

@@ -1,4 +1,3 @@
-import json
 from pathlib import Path
 
 from PySide6.QtCore import QObject, Signal
@@ -23,7 +22,7 @@ class LibraryRepository(QObject):
             for candidate in library_candidates(path):
                 try:
                     libraries.append(load_library_file(candidate))
-                except (OSError, ValueError, KeyError, TypeError, json.JSONDecodeError) as error:
+                except (OSError, ValueError, KeyError, TypeError) as error:
                     warnings.append(f"{candidate}: {error}")
         self.libraries = libraries
         self.load_warnings = warnings

BEdit/ui/main_window.ui

@@ -364,7 +364,10 @@
          </widget>
         </item>
         <item>
-         <widget class="QStackedWidget" name="workspaceStack">
+         <widget class="QSplitter" name="workspaceVerticalSplitter">
+          <property name="orientation"><enum>Qt::Orientation::Vertical</enum></property>
+          <property name="childrenCollapsible"><bool>false</bool></property>
+          <widget class="QStackedWidget" name="workspaceStack">
           <property name="currentIndex">
            <number>0</number>
           </property>
@@ -426,6 +429,20 @@
             </item>
            </layout>
           </widget>
+          </widget>
+          <widget class="QTabWidget" name="outputTabs">
+           <property name="minimumSize"><size><width>0</width><height>100</height></size></property>
+           <widget class="QWidget" name="logTab">
+            <attribute name="title"><string>Log</string></attribute>
+            <layout class="QVBoxLayout" name="logTabLayout">
+             <property name="leftMargin"><number>0</number></property>
+             <property name="topMargin"><number>0</number></property>
+             <property name="rightMargin"><number>0</number></property>
+             <property name="bottomMargin"><number>0</number></property>
+             <item><widget class="QPlainTextEdit" name="logOutput"><property name="readOnly"><bool>true</bool></property><property name="maximumBlockCount"><number>5000</number></property><property name="placeholderText"><string>Application messages appear here.</string></property></widget></item>
+            </layout>
+           </widget>
+          </widget>
          </widget>
         </item>
        </layout>
@@ -570,6 +587,46 @@
    <addaction name="actionZoomOut"/>
    <addaction name="actionCenterView"/>
   </widget>
+  <widget class="QToolBar" name="simulationToolbar">
+   <property name="windowTitle">
+    <string>Simulation</string>
+   </property>
+   <property name="toolButtonStyle">
+    <enum>Qt::ToolButtonStyle::ToolButtonIconOnly</enum>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="actionSimulationSettings"/>
+   <addaction name="actionCompile"/>
+  </widget>
+  <action name="actionSimulationSettings">
+   <property name="icon">
+    <iconset resource="../resources/resources.qrc">
+     <normaloff>:/icons/icons/preferences-system.png</normaloff>:/icons/icons/preferences-system.png</iconset>
+   </property>
+   <property name="text">
+    <string>Simulation Settings</string>
+   </property>
+   <property name="statusTip">
+    <string>Edit settings stored in the active graph</string>
+   </property>
+  </action>
+  <action name="actionCompile">
+   <property name="icon">
+    <iconset resource="../resources/resources.qrc">
+     <normaloff>:/icons/icons/run-build.png</normaloff>:/icons/icons/run-build.png</iconset>
+   </property>
+   <property name="text">
+    <string>Compile</string>
+   </property>
+   <property name="statusTip">
+    <string>Compile the active graph for simulation</string>
+   </property>
+  </action>
   <action name="actionNew">
    <property name="icon">
     <iconset resource="../resources/resources.qrc">

BEdit/ui/settings_dialog.ui

@@ -94,7 +94,7 @@
        <item>
         <widget class="QLabel" name="libraryPathsLabel">
          <property name="text">
-          <string>Load library JSON files from these files or folders at startup:</string>
+          <string>Load library JSON or BEdit Binary files from these files or folders at startup:</string>
          </property>
          <property name="wordWrap">
           <bool>true</bool>

BEdit/ui/simulation_settings_dialog.ui

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SimulationSettingsDialog</class>
+ <widget class="QDialog" name="SimulationSettingsDialog">
+  <property name="geometry"><rect><x>0</x><y>0</y><width>420</width><height>180</height></rect></property>
+  <property name="windowTitle"><string>Simulation Settings</string></property>
+  <layout class="QVBoxLayout" name="dialogLayout">
+   <item><widget class="QGroupBox" name="settingsGroup"><property name="title"><string>Settings</string></property><layout class="QVBoxLayout" name="settingsLayout"><item><widget class="QCheckBox" name="placeholderCheckBox"><property name="text"><string>Enable simulation option</string></property></widget></item><item><spacer name="settingsSpacer"><property name="orientation"><enum>Qt::Orientation::Vertical</enum></property><property name="sizeHint" stdset="0"><size><width>20</width><height>40</height></size></property></spacer></item></layout></widget></item>
+   <item><widget class="QDialogButtonBox" name="buttonBox"><property name="standardButtons"><set>QDialogButtonBox::StandardButton::Cancel|QDialogButtonBox::StandardButton::Ok</set></property></widget></item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection><sender>buttonBox</sender><signal>accepted()</signal><receiver>SimulationSettingsDialog</receiver><slot>accept()</slot><hints/></connection>
+  <connection><sender>buttonBox</sender><signal>rejected()</signal><receiver>SimulationSettingsDialog</receiver><slot>reject()</slot><hints/></connection>
+ </connections>
+</ui>

BEdit/untitled.bedit.json

@@ -908,7 +908,10 @@
               },
               "type": "signal"
             }
-          ]
+          ],
+          "simulation": {
+            "enabled": true
+          }
         }
       }
     }