Make everything lint free.

etc/pylintrc

@@ -10,7 +10,7 @@ output-format=text
 msg-template={path}:{line}:{obj} {msg_id}({symbol}) {msg}
 
 [MESSAGES CONTROL]
-disable=missing-module-docstring,missing-class-docstring,missing-function-docstring,too-few-public-methods,no-self-use,duplicate-code,invalid-name,too-many-arguments,too-many-branches,too-many-instance-attributes,too-many-statements,typecheck,redefined-builtin
+disable=missing-module-docstring,missing-class-docstring,missing-function-docstring,too-few-public-methods,no-self-use,duplicate-code,invalid-name,too-many-arguments,too-many-branches,too-many-instance-attributes,too-many-statements,typecheck,redefined-builtin,too-many-public-methods,consider-using-enumerate
 
 [FORMAT]
 max-line-length=120

noisicaa/model/base.py

@@ -18,6 +18,7 @@
 #
 # @end:license
 
+import enum
 import logging
 import pprint
 import sys
@@ -248,6 +249,14 @@ def ScalarProperty(
 
     return prop, sig
 
+ENUM = TypeVar('ENUM', bound=enum.Enum)
+def EnumProperty(
+        name: str, pytype: Type[ENUM], qtype: Union[type, str] = None, *,
+        default: ENUM = None,
+        validate: Callable[['BaseObject', ENUM], None] = None
+) -> Tuple['QtCore.Property[ENUM]', QtCore.Signal]:
+    return ScalarProperty(name, pytype, qtype, default=default, validate=validate)  # type: ignore
+
 
 _qobj_types = (QtCore.QRectF, QtGui.QColor)
 QOBJ = TypeVar('QOBJ', QtCore.QRectF, QtGui.QColor)

noisicaa/model/project.py

@@ -48,9 +48,9 @@ class ConnectIOBuffer(EngineChange):
 
 class Port(base.BaseObject):
     name, nameChanged = base.ScalarProperty('uri', str)
-    direction, directionChanged = base.ScalarProperty(
+    direction, directionChanged = base.EnumProperty(
         'direction', engine.PortDirection, qtype=int, default=engine.PortDirection.INPUT)
-    type, typeChanged = base.ScalarProperty('type', engine.PortType, qtype=int, default=engine.PortType.NOT_SET)
+    type, typeChanged = base.EnumProperty('type', engine.PortType, qtype=int, default=engine.PortType.NOT_SET)
     hasControlValue, hasControlValueChanged = base.ScalarProperty('hasControlValue', bool)
     controlValue, controlValueChanged = base.ScalarProperty('controlValue', float)
 

noisicaa/node_lib/oscilloscope/ui.py

@@ -19,6 +19,7 @@
 # @end:license
 
 import logging
+from typing import Any
 
 from PySide2 import QtCore
 
@@ -31,38 +32,38 @@ logger = logging.getLogger(__name__)
 class Node(GraphNode):
     addSamples = QtCore.Signal(int, list)
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
         self.setNodeMessageHandler(self.__handleNodeMessage)
 
-    def __handleNodeMessage(self, msg_serialized: bytes):
+    def __handleNodeMessage(self, msg_serialized: bytes) -> None:
         msg = node_message_fb.NodeMessage(msg_serialized)
         self.addSamples.emit(msg.sample_rate, msg.samples)
 
     @QtCore.Slot(int)
-    def setTimeScale(self, v):
+    def setTimeScale(self, v: int) -> None:
         if v == self.node.timeScale:
             return
         with self.project.captureChanges("{}: Set time scale".format(self.node.title)):
             self.node.timeScale = v
 
     @QtCore.Slot(int)
-    def setYScale(self, v):
+    def setYScale(self, v: int) -> None:
         if v == self.node.yScale:
             return
         with self.project.captureChanges("{}: Set Y scale".format(self.node.title)):
             self.node.yScale = v
 
     @QtCore.Slot(float)
-    def setYOffset(self, v):
+    def setYOffset(self, v: float) -> None:
         if v == self.node.yOffset:
             return
         with self.project.captureChanges("{}: Set Y offset".format(self.node.title)):
             self.node.yOffset = v
 
     @QtCore.Slot(int)
-    def setHoldTime(self, v):
+    def setHoldTime(self, v: int) -> None:
         if v == self.node.holdTime:
             return
         with self.project.captureChanges("{}: Set hold time".format(self.node.title)):

noisicaa/node_lib/sink/ui.py

@@ -19,12 +19,14 @@
 # @end:license
 
 import logging
+from typing import Any, Dict, List
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
 
 from noisicaa import engine
 from noisicaa.ui import ui_base
+from noisicaa.ui.DeviceDB import DeviceDB, Device
 from noisicaa.ui.GraphNode import GraphNode
 
 logger = logging.getLogger(__name__)
@@ -33,18 +35,18 @@ logger = logging.getLogger(__name__)
 class PortList(QtCore.QAbstractListModel):
     changed = QtCore.Signal()
 
-    def __init__(self, parent=None):
+    def __init__(self, parent: QtCore.QObject = None) -> None:
         super().__init__(parent)
 
-        self.__ports = []
+        self.__ports = []  # type: List[str]
 
-    def clear(self):
+    def clear(self) -> None:
         if self.__ports:
             self.beginRemoveRows(QtCore.QModelIndex(), 0, len(self.__ports) - 1)
             self.__ports.clear()
             self.endRemoveRows()
 
-    def setFromDevice(self, device):
+    def setFromDevice(self, device: Device) -> None:
         self.clear()
 
         ports = [
@@ -58,15 +60,15 @@ class PortList(QtCore.QAbstractListModel):
 
         self.changed.emit()
 
-    def roleNames(self):
+    def roleNames(self) -> Dict[int, bytes]:
         return {
             Qt.DisplayRole: b'portName',
         }
 
-    def rowCount(self, parent=QtCore.QModelIndex()):
+    def rowCount(self, parent: QtCore.QModelIndex = QtCore.QModelIndex()) -> int:  # pylint: disable=unused-argument
         return len(self.__ports)
 
-    def data(self, index, role=Qt.DisplayRole):
+    def data(self, index: QtCore.QModelIndex, role: int = Qt.DisplayRole) -> Any:
         if not index.isValid():
             return None
         if index.row() < 0 or index.row() >= len(self.__ports):
@@ -78,11 +80,15 @@ class PortList(QtCore.QAbstractListModel):
 
 
 class SinkDevices(QtCore.QSortFilterProxyModel):
-    def __init__(self, deviceDB, parent=None):
+    def __init__(self, deviceDB: DeviceDB, parent: QtCore.QObject = None) -> None:
         super().__init__(parent)
         self.setSourceModel(deviceDB)
 
-    def filterAcceptsRow(self, source_row, source_parent):
+    def filterAcceptsRow(
+            self,
+            source_row: int,
+            source_parent: QtCore.QModelIndex  # pylint: disable=unused-argument
+    ) -> bool:
         device = self.sourceModel()[source_row]
         return any(
             port.type == engine.PortType.AUDIO and port.direction == engine.PortDirection.INPUT
@@ -92,7 +98,7 @@ class SinkDevices(QtCore.QSortFilterProxyModel):
 class Node(GraphNode):
     isConnected, isConnectedChanged = ui_base.Property('isConnected', bool)
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs: Any) -> None:
         super().__init__(**kwargs)
         self.__devices = SinkDevices(self.app.deviceDB, self)
 
@@ -104,15 +110,15 @@ class Node(GraphNode):
         self.node.deviceChanged.connect(lambda _: self.__updateIsConnected())
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def devices(self):
+    def devices(self) -> QtCore.QAbstractItemModel:
         return self.__devices
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def devicePorts(self):
+    def devicePorts(self)  -> QtCore.QAbstractItemModel:
         return self.__devicePorts
 
     @QtCore.Slot(str)
-    def setDevice(self, v):
+    def setDevice(self, v: str) -> None:
         if v == self.node.device:
             return
 
@@ -128,14 +134,14 @@ class Node(GraphNode):
                 self.node.devicePorts[i] = ports[i] if i < len(ports) else ''
 
     @QtCore.Slot(int, str)
-    def setDevicePort(self, idx, v):
+    def setDevicePort(self, idx: int, v: str) -> None:
         if v == self.node.devicePorts[idx]:
             return
 
         with self.project.captureChanges("{}: Change device port".format(self.node.title)):
             self.node.devicePorts[idx] = v
 
-    def __updateDevicePorts(self):
+    def __updateDevicePorts(self) -> None:
         try:
             device = self.app.deviceDB.getDevice(self.node.device)
         except KeyError:
@@ -143,7 +149,7 @@ class Node(GraphNode):
         else:
             self.__devicePorts.setFromDevice(device)
 
-    def __updateIsConnected(self):
+    def __updateIsConnected(self) -> None:
         for r in range(self.__devices.rowCount()):
             if self.__devices.data(self.__devices.index(r, 0)) == self.node.device:
                 self.isConnected = True

noisicaa/node_lib/ui_registry.py

@@ -22,13 +22,18 @@ import importlib
 import logging
 import os
 import os.path
+import typing
+from typing import Dict, Type
+
+if typing.TYPE_CHECKING:
+    from noisicaa.ui.GraphNode import GraphNode
 
 logger = logging.getLogger(__name__)
 
 
 class UIRegistry:
-    def __init__(self):
-        self.classes = {}
+    def __init__(self) -> None:
+        self.classes = {}  # type: Dict[str, Type[GraphNode]]
 
         base = os.path.dirname(__file__)
         for node in os.listdir(base):
@@ -43,22 +48,27 @@ class UIRegistry:
 
             logger.info("Importing UI module for node '%s'...", node)
 
-            ui_mod_name = 'noisicaa.node_lib.{}.{}'.format(node, 'ui')
+            ui_mod_name = 'noisicaa.node_lib.{}.ui'.format(node)
             ui_mod = importlib.import_module(ui_mod_name)
 
+            cls = getattr(ui_mod, 'CLASS')
+            assert cls is not None, ui_mod_name
+            uri = getattr(ui_mod, 'URI')
+            assert uri is not None, ui_mod_name
+
             seen = set()
-            for c in ui_mod.CLASS.__mro__:
+            for c in cls.__mro__:
                 #  https://bugreports.qt.io/browse/PYSIDE-983
                 assert c.__name__ not in seen, (
                     "Duplicate class name {} in MRO of class {}.{}".format(
-                        c.__name__, ui_mod.CLASS.__module__, ui_mod.CLASS.__qualname__))
+                        c.__name__, cls.__module__, cls.__qualname__))
                 seen.add(c.__name__)
 
-            assert ui_mod.URI not in self.classes, (
-                "Duplicate URI {} in {}".format(ui_mod.URI, ui_mod_name))
-            self.classes[ui_mod.URI] = ui_mod.CLASS
+            assert uri not in self.classes, (
+                "Duplicate URI {} in {}".format(uri, ui_mod_name))
+            self.classes[uri] = cls
 
-    def getClass(self, uri):
+    def getClass(self, uri: str) -> 'Type[GraphNode]':
         try:
             return self.classes[uri]
         except KeyError:

noisicaa/node_lib/vumeter/ui.py

@@ -19,6 +19,7 @@
 # @end:license
 
 import logging
+from typing import Any
 
 from noisicaa.ui import ui_base
 from noisicaa.ui.GraphNode import GraphNode
@@ -31,12 +32,12 @@ class Node(GraphNode):
     current, currentChanged = ui_base.Property('current', float, default=-80.0)
     peak, peakChanged = ui_base.Property('peak', float, default=-80.0)
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
         self.setNodeMessageHandler(self.__handleNodeMessage)
 
-    def __handleNodeMessage(self, msg_serialized: bytes):
+    def __handleNodeMessage(self, msg_serialized: bytes) -> None:
         msg = node_message_fb.NodeMessage(msg_serialized)
         self.current = msg.current
         self.peak = msg.peak

noisicaa/ui/App.py

@@ -21,11 +21,13 @@
 import contextlib
 import os
 import os.path
+from typing import Dict, Iterator, List
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
 from PySide2 import QtGui
 from PySide2 import QtQml
+from PySide2 import QtQuick
 import flatbuffers
 
 import noisicaa
@@ -44,24 +46,24 @@ logger = logging.getLogger(__name__)
 
 
 class RecentProjects(QtCore.QStringListModel):
-    def __init__(self, parent):
+    def __init__(self, parent: QtCore.QObject) -> None:
         super().__init__(parent)
 
-        self.__paths = []
+        self.__paths = []  # type: List[str]
 
-    def paths(self):
+    def paths(self) -> List[str]:
         return list(self.__paths)
 
-    def setPaths(self, lst):
+    def setPaths(self, lst: List[str]) -> None:
         self.__paths = list(lst)
         self.setStringList(self.__paths)
 
-    def roleNames(self):
+    def roleNames(self) -> Dict[int, bytes]:
         return {
             Qt.DisplayRole: b'path',
         }
 
-    def addPath(self, path):
+    def addPath(self, path: str) -> None:
         for idx, p in reversed(list(enumerate(self.__paths))):
             if p == path:
                 del self.__paths[idx]
@@ -98,17 +100,17 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
         self._project = None  # type: Project
         self._qmlEngine = None  # type: QtQml.QQmlApplicationEngine
         self._projectWindowComponent = None  # type: QtQml.QQmlComponent
-        self._window = None  # type: Window
+        self._window = None  # type: QtQuick.QQuickItem
 
     @ui_base.ConstProperty(str)
     def appVersion(self) -> str:
         return noisicaa.__version__
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def recentProjects(self):
+    def recentProjects(self) -> RecentProjects:
         return self._recentProjects
 
-    def addRecentProject(self, path):
+    def addRecentProject(self, path: str) -> None:
         self._recentProjects.addPath(path)
         self.settings.setValue('recentProjects', self._recentProjects.paths())
 
@@ -145,7 +147,7 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
         raise NotImplementedError
 
     @contextlib.contextmanager
-    def settingsGroup(self, group) -> QtCore.QSettings:
+    def settingsGroup(self, group: str) -> Iterator[QtCore.QSettings]:
         self.settings.beginGroup(group)
         try:
             yield self.settings
@@ -156,7 +158,7 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
     def engine(self) -> engine_lib.Engine:
         return self._engine
 
-    def createQmlComponent(self, path):
+    def createQmlComponent(self, path: str) -> QtQml.QQmlComponent:
         path = os.path.join(os.path.dirname(os.path.dirname(noisicaa.__file__)), path)
         url = QtCore.QUrl.fromLocalFile(path)
         component = QtQml.QQmlComponent(self.qmlEngine)
@@ -167,9 +169,9 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
             raise RuntimeError("Failed to load component '{}'".format(path))
         return component
 
-    def updateAudioBackend(self):
+    def updateAudioBackend(self) -> None:
         with self.settingsGroup('audio') as settings:
-            backend = settings.value('backend', 'jack')
+            backend = str(settings.value('backend', 'jack'))
 
         builder = flatbuffers.Builder(1024)
         builder.Finish(engine_lib.CreateBackendSettings(
@@ -182,7 +184,7 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
         return SettingsDialog(parent=self, context=self.__context)
 
     @QtCore.Slot()
-    def newProject(self):
+    def newProject(self) -> None:
         logger.info("New project...")
         if self._project is not None:
             self._project.cleanup()
@@ -194,7 +196,7 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
             self._window.setProperty('d', self._project)
 
     @QtCore.Slot(str)
-    def openProject(self, path):
+    def openProject(self, path: str) -> None:
         if path.startswith('file://'):
             path = path[7:]
         logger.info("Open project '%s'...", path)
@@ -211,7 +213,7 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
             self._window.setProperty('d', self._project)
 
     @QtCore.Slot()
-    def showEngineProgramWindow(self):
+    def showEngineProgramWindow(self) -> None:
         if self.__engineProgramWindow is None:
             self.__engineProgramComponent = self.createQmlComponent(
                 os.path.join(os.path.dirname(__file__), 'EngineProgramWindow.qml'))
@@ -222,5 +224,5 @@ class App(ui_base.PropertyContainer, QtCore.QObject):
         self.__engineProgramWindow.show()
         self.__engineProgramWindow.requestActivate()
 
-    def __programChanged(self):
+    def __programChanged(self, unused_: object=None) -> None:
         self.engineProgram = self._engine.program_code()

noisicaa/ui/CreateNodeDialog.py

@@ -19,6 +19,7 @@
 # @end:license
 
 import logging
+from typing import Any
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
@@ -29,15 +30,15 @@ logger = logging.getLogger(__name__)
 
 
 class CreateNodeDialog(ui_base.ProjectMixin, QtCore.QObject):
-    def __init__(self, **kwargs) -> None:
+    def __init__(self, **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
         self.__model = QtCore.QSortFilterProxyModel(self)
         self.__model.setSourceModel(self.app.nodeDB)
 
+    @ui_base.ConstProperty(QtCore.QObject)
     def nodeDB(self) -> QtCore.QAbstractItemModel:
         return self.__model
-    nodeDB = QtCore.Property(QtCore.QObject, fget=nodeDB, constant=True)
 
     @QtCore.Slot(str)
     def setFilter(self, filter: str) -> None:

noisicaa/ui/DeviceDB.py

@@ -20,29 +20,32 @@
 
 import bisect
 import logging
+from typing import Any, Dict, Iterator, List
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
 
+from noisicaa import engine
+
 logger = logging.getLogger(__name__)
 
 
 class Port:
-    def __init__(self, name, direction, type):
+    def __init__(self, name: str, direction: engine.PortDirection, type: engine.PortType) -> None:
         self.name = name
         self.direction = direction
         self.type = type
 
 
 class Device:
-    def __init__(self, name):
+    def __init__(self, name: str) -> None:
         self.name = name
-        self.ports = []
+        self.ports = []  # type: List[Port]
 
-    def addPort(self, name, direction, type):
+    def addPort(self, name: str, direction: engine.PortDirection, type: engine.PortType) -> None:
         self.ports.append(Port(name, direction, type))
 
-    def __lt__(self, other):
+    def __lt__(self, other: object) -> bool:
         if isinstance(other, str):
             return self.name < other
         if isinstance(other, Device):
@@ -51,29 +54,29 @@ class Device:
 
 
 class DeviceDB(QtCore.QAbstractListModel):
-    def __init__(self, parent=None):
+    def __init__(self, parent: QtCore.QObject = None) -> None:
         super().__init__(parent)
 
-        self.__devices = []
+        self.__devices = []  # type: List[Device]
 
-    def __iter__(self):
+    def __iter__(self) -> Iterator[Device]:
         yield from self.__devices
 
-    def __getitem__(self, idx):
+    def __getitem__(self, idx: int) -> Device:
         return self.__devices[idx]
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(self.__devices)
 
-    def roleNames(self):
+    def roleNames(self) -> Dict[int, bytes]:
         return {
             Qt.DisplayRole: b'deviceName',
         }
 
-    def rowCount(self, parent=QtCore.QModelIndex()):
+    def rowCount(self, parent: QtCore.QModelIndex = QtCore.QModelIndex()) -> int:  # pylint: disable=unused-argument
         return len(self.__devices)
 
-    def data(self, index, role=Qt.DisplayRole):
+    def data(self, index: QtCore.QModelIndex, role: int = Qt.DisplayRole) -> Any:
         if not index.isValid():
             return None
         if index.row() < 0 or index.row() >= len(self.__devices):
@@ -84,13 +87,13 @@ class DeviceDB(QtCore.QAbstractListModel):
             return device.name
         return None
 
-    def getDevice(self, name):
+    def getDevice(self, name: str) -> Device:
         idx = bisect.bisect_left(self.__devices, name)
         if idx < len(self.__devices) and self.__devices[idx].name == name:
             return self.__devices[idx]
         raise KeyError(name)
 
-    def addDevice(self, name):
+    def addDevice(self, name: str) -> Device:
         idx = bisect.bisect_left(self.__devices, name)
         assert idx >= len(self.__devices) or self.__devices[idx].name != name, "Device {} already exists".format(name)
 

noisicaa/ui/GraphConnection.py

@@ -19,6 +19,7 @@
 # @end:license
 
 import logging
+from typing import Any, Dict
 
 from PySide2 import QtCore
 
@@ -33,24 +34,24 @@ logger = logging.getLogger(__name__)
 class GraphConnection(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
     highlighted, highlightedChanged = ui_base.Property('highlighted', bool)
 
-    def __init__(self, *, connection, nodeMap, **kwargs):
+    def __init__(self, *, connection: model.Connection, nodeMap: Dict[int, GraphNode], **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
         self.__connection = connection
         self.__srcNode = nodeMap[self.__connection.srcNodeId]
         self.__destNode = nodeMap[self.__connection.destNodeId]
 
-    def __str__(self):
+    def __str__(self) -> str:
         return '<{} {}>'.format(type(self).__name__, self.__connection)
 
     @ui_base.ConstProperty(model.Connection)
-    def connection(self):
+    def connection(self) -> model.Connection:
         return self.__connection
 
     @ui_base.ConstProperty(GraphNode)
-    def srcNode(self):
+    def srcNode(self) -> GraphNode:
         return self.__srcNode
 
     @ui_base.ConstProperty(GraphNode)
-    def destNode(self):
+    def destNode(self) -> GraphNode:
         return self.__destNode

noisicaa/ui/GraphNode.py

@@ -21,11 +21,13 @@
 import logging
 import sys
 import textwrap
+from typing import Any, Callable, Dict, List
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
 from PySide2 import QtGui
-from PySide2 import QtWidgets
+from PySide2 import QtQml
+from PySide2 import QtQuick
 
 from noisicaa import model
 from noisicaa import engine
@@ -51,7 +53,7 @@ class GraphNodePort(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObj
     glowing, glowingChanged = ui_base.Property('glowing', bool)
     numConnections, numConnectionsChanged = ui_base.Property('numConnection', int)
 
-    def __init__(self, *, node, port, **kwargs):
+    def __init__(self, *, node: 'GraphNode', port: model.Port, **kwargs: Any) -> None:
         super().__init__(parent=node, **kwargs)
 
         self.__node = node
@@ -62,11 +64,11 @@ class GraphNodePort(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObj
 
     # Can't declare this as GraphNode, because this would cause a dependency cycle.
     @ui_base.ConstProperty(QtCore.QObject)
-    def node(self):
+    def node(self) -> 'GraphNode':
         return self.__node
 
     @ui_base.ConstProperty(model.Port)
-    def port(self):
+    def port(self) -> model.Port:
         return self.__port
 
     @QtCore.Slot(float)
@@ -81,17 +83,15 @@ class GraphNodePort(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObj
 
 
 class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
-    def __init__(self, *, node, **kwargs):
+    def __init__(self, *, node: model.GraphNode, **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
-        self.__node_message_listener = None
-
         self.__node = node
         self.__description = self.app.nodeDB.nodeDescription(self.__node.uri)
 
-        self.__ports = {}
-        self.__in_ports = []
-        self.__out_ports = []
+        self.__ports = {}  # type: Dict[str, GraphNodePort]
+        self.__in_ports = []  # type: List[GraphNodePort]
+        self.__out_ports = []  # type: List[GraphNodePort]
         for port in self.__node.ports:
             wrapper = GraphNodePort(node=self, port=port, context=self.context)
             self.__ports[port.name] = wrapper
@@ -107,41 +107,43 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
         self.__active = False
         self.__selected = False
 
-        self.__nodeMessageListener = None
+        self.__nodeMessageListener = None  # type: int
 
-        self.__body = None
-        self.__bodyComponent = None
+        self.__body = None  # type: QtQuick.QQuickItem
+        self.__bodyComponent = None  # type: QtQml.QQmlComponent
 
-    def cleanup(self):
+    def cleanup(self) -> None:
         if self.__nodeMessageListener is not None:
             self.engine.remove_node_message_listener(self.__node.id, self.__nodeMessageListener)
             self.__nodeMessageListener = None
 
-    def setNodeMessageHandler(self, handler):
+    def setNodeMessageHandler(self, handler: Callable[[bytes], None]) -> None:
         assert self.__nodeMessageListener is None
         self.__nodeMessageListener = self.engine.add_node_message_listener(self.__node.id, handler)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return '<{} {}>'.format(type(self).__name__, self.__node)
 
     @ui_base.ConstProperty(model.GraphNode)
-    def node(self):
+    def node(self) -> model.GraphNode:
         return self.__node
 
     @ui_base.ConstProperty(engine.NodeDescription)
-    def description(self):
+    def description(self) -> engine.NodeDescription:
         return self.__description
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def body(self):
+    def body(self) -> QtQuick.QQuickItem:
         if self.__body is None and self.__description.ui is not None and self.__description.ui.body_qml is not None:
-            logger.info("%s#%016x: Loading body component '%s'...", self.__node.uri, self.__node.id, self.__description.ui.body_qml)
+            logger.info(
+                "%s#%016x: Loading body component '%s'...",
+                self.__node.uri, self.__node.id, self.__description.ui.body_qml)
             self.__bodyComponent = self.app.createQmlComponent(self.__description.ui.body_qml)
             self.__body = self.__bodyComponent.createWithInitialProperties({'d': self})
         return self.__body
 
     @QtCore.Slot()
-    def moveDone(self):
+    def moveDone(self) -> None:
         with self.project.captureChanges("{}: Move node".format(self.__node.title)):
             self.__node.rect = QtCore.QRectF(
                 int(self.__rect.x() / self.__zoom + 10) // 20 * 20,
@@ -150,7 +152,7 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
                 int(self.__rect.height() / self.__zoom + 10) // 20 * 20)
 
     @QtCore.Slot()
-    def resizeDone(self):
+    def resizeDone(self) -> None:
         with self.project.captureChanges("{}: Resize node".format(self.__node.title)):
             self.__node.rect = QtCore.QRectF(
                 self.__rect.x() / self.__zoom,
@@ -159,34 +161,13 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
                 self.__rect.height() / self.__zoom)
 
     @QtCore.Slot()
-    def showContextMenu(self):
-        menu = QtWidgets.QMenu(self.__view)
-
-        rename_action = menu.addAction("Rename...")
-        rename_action.triggered.connect(self.__rename)
-
-        color_menu = menu.addMenu("Set color")
-        color_action = SelectColorAction(color_menu)
-        color_action.colorSelected.connect(self.__setColor)
-        color_menu.addAction(color_action)
-
-        menu.addAction("Cut")
-        menu.addAction("Copy")
-        menu.addAction("Duplicate")
-        delete_action = menu.addAction("Delete")
-        delete_action.triggered.connect(self.delete)
-
-        if not menu.isEmpty():
-            menu.popup(QtGui.QCursor.pos())
-
-    @QtCore.Slot()
-    def delete(self):
+    def delete(self) -> None:
         with self.project.captureChanges("{}: Delete node".format(self.__node.title)):
             self.model.deleteNode(self.__node)
 
-    def getRect(self):
+    def getRect(self) -> QtCore.QRectF:
         return self.__rect
-    def setRect(self, r):
+    def setRect(self, r: QtCore.QRectF) -> None:
         r = QtCore.QRectF(
             int(r.x() / self.__zoom + 10) // 20 * 20 * self.__zoom,
             int(r.y() / self.__zoom + 10) // 20 * 20 * self.__zoom,
@@ -223,7 +204,7 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
     rectChanged = QtCore.Signal(QtCore.QRectF)
     rect = QtCore.Property(QtCore.QRectF, fget=getRect, fset=setRect, notify=rectChanged)
 
-    def __nodeRectChanged(self, rect):
+    def __nodeRectChanged(self, rect: QtCore.QRectF) -> None:
         self.setRect(QtCore.QRectF(
             int(self.__zoom * rect.x()),
             int(self.__zoom * rect.y()),
@@ -231,22 +212,22 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             int(self.__zoom * rect.height())))
 
     @QtCore.Slot(str, result=GraphNodePort)
-    def port(self, portName):
+    def port(self, portName: str) -> GraphNodePort:
         return self.__ports.get(portName)
 
-    def ports(self):
+    @ui_base.ConstProperty(List[GraphNodePort], list)
+    def ports(self) -> List[GraphNodePort]:
         return [self.__ports[port.name] for port in self.__node.ports]
-    ports = QtCore.Property(list, fget=ports, constant=True)
 
-    def setZoom(self, v):
+    def setZoom(self, v: float) -> None:
         if v == self.__zoom:
             return
         self.__zoom = v
         self.__nodeRectChanged(self.__node.rect)
 
-    def isActive(self):
+    def isActive(self) -> bool:
         return self.__active
-    def setActive(self, v):
+    def setActive(self, v: bool) -> None:
         if v == self.__active:
             return
         self.__active = v
@@ -254,9 +235,9 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
     activeChanged = QtCore.Signal(bool)
     active = QtCore.Property(bool, fget=isActive, fset=setActive, notify=activeChanged)
 
-    def isSelected(self):
+    def isSelected(self) -> bool:
         return self.__selected
-    def setSelected(self, v):
+    def setSelected(self, v: bool) -> None:
         if v == self.__selected:
             return
         self.__selected = v
@@ -270,7 +251,8 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             with self.project.captureChanges("{}: Rename node".format(self.__node.title)):
                 self.__node.title = title
 
-    def nodeColors(self):
+    @ui_base.ConstProperty(List[QtGui.QColor], list)
+    def nodeColors(self) -> List[QtGui.QColor]:
         return [
             QtGui.QColor(180, 180, 180),
             QtGui.QColor(205, 205, 205),
@@ -282,8 +264,8 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             QtGui.QColor(255, 205, 205),
             QtGui.QColor(255, 230, 230),
 
-            QtGui.QColor(255, 155, 0.1),
-            QtGui.QColor(255, 180, 0.3),
+            QtGui.QColor(255, 155, 26),
+            QtGui.QColor(255, 180, 77),
             QtGui.QColor(255, 205, 155),
             QtGui.QColor(255, 230, 205),
 
@@ -312,7 +294,6 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             QtGui.QColor(205, 255, 255),
             QtGui.QColor(230, 255, 255),
         ]
-    nodeColors = QtCore.Property(list, fget=nodeColors, constant=True)
 
     @QtCore.Slot(QtGui.QColor)
     def setColor(self, color: QtGui.QColor) -> None:
@@ -321,7 +302,7 @@ class GraphNode(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
                 self.__node.color = color
 
     @QtCore.Slot(result=str)
-    def debugInfo(self):
+    def debugInfo(self) -> str:
         info = []
         info.append(str(self))
         info.append("class: {}".format(type(self).__qualname__))

noisicaa/ui/GraphView.py

@@ -20,6 +20,7 @@
 
 import functools
 import logging
+from typing import Any, Dict, Generic, Iterator, List, Sequence, TypeVar
 
 from PySide2.QtCore import Qt
 from PySide2 import QtCore
@@ -32,26 +33,26 @@ from .GraphConnection import GraphConnection
 
 logger = logging.getLogger(__name__)
 
-
-class ObjectList(QtCore.QAbstractListModel):
-    def __init__(self, parent=None):
+OBJ = TypeVar('OBJ')
+class ObjectList(Generic[OBJ], QtCore.QAbstractListModel):
+    def __init__(self, parent: QtCore.QObject = None) -> None:
         super().__init__(parent)
 
-        self.__list = []
+        self.__list = []  # type: List[OBJ]
 
-    def __iter__(self):
+    def __iter__(self) -> Iterator[OBJ]:
         yield from self.__list
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(self.__list)
 
-    def __getitem__(self, idx):
+    def __getitem__(self, idx: int) -> OBJ:
         return self.__list[idx]
 
-    def rowCount(self, parent=QtCore.QModelIndex()):
+    def rowCount(self, parent: QtCore.QModelIndex = QtCore.QModelIndex()) -> int:  # pylint: disable=unused-argument
         return len(self.__list)
 
-    def data(self, index, role=Qt.DisplayRole):
+    def data(self, index: QtCore.QModelIndex, role: int = Qt.DisplayRole) -> OBJ:
         if role != Qt.DisplayRole:
             return None
         if not index.isValid():
@@ -60,12 +61,12 @@ class ObjectList(QtCore.QAbstractListModel):
             return None
         return self.__list[index.row()]
 
-    def insertObject(self, row, obj):
+    def insertObject(self, row: int, obj: OBJ) -> None:
         self.beginInsertRows(QtCore.QModelIndex(), row, row)
         self.__list.insert(row, obj)
         self.endInsertRows()
 
-    def removeObject(self, row):
+    def removeObject(self, row: int) -> OBJ:
         self.beginRemoveRows(QtCore.QModelIndex(), row, row)
         obj = self.__list.pop(row)
         self.endRemoveRows()
@@ -78,16 +79,16 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
     offset, offsetChanged = ui_base.Property('offset', QtCore.QPointF)
     contentRect, contentRectChanged = ui_base.Property('contextRect', QtCore.QRectF)
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs: Any) -> None:
         super().__init__(**kwargs)
 
-        self.__nodes = ObjectList(self)
-        self.__nodeMap = {}
+        self.__nodes = ObjectList[GraphNode](self)
+        self.__nodeMap = {}  # type: Dict[int, GraphNode]
         for idx, node in enumerate(self.model.nodes):
             self.__addNode(idx, node)
         self.model.nodesChanged.connect(self.__nodesChanged)
 
-        self.__connections = ObjectList(self)
+        self.__connections = ObjectList[GraphConnection](self)
         for idx, connection in enumerate(self.model.connections):
             self.__addConnection(idx, connection)
         self.model.connectionsChanged.connect(self.__connectionsChanged)
@@ -99,20 +100,20 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
         self.__selection = QtCore.QItemSelectionModel(self.__nodes, self)
         self.__selection.selectionChanged.connect(self.__selectionChanged)
 
-    def cleanup(self):
+    def cleanup(self) -> None:
         while self.__connections:
             self.__removeConnection(0)
         while self.__nodes:
             self.__removeNode(0)
 
-    def saveState(self):
+    def saveState(self) -> Dict[str, Any]:
         return {
             'x': self.offset.x(),
             'y': self.offset.y(),
             'zoom': self.zoom,
         }
 
-    def restoreState(self, state):
+    def restoreState(self, state: Dict[str, Any]) -> None:
         self.offset = QtCore.QPointF(
             float(state.get('x', 0.0)), float(state.get('y', 0.0)))
         self.zoom = float(state.get('zoom', 1.0))
@@ -121,24 +122,24 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
     def selection(self) -> QtCore.QItemSelectionModel:
         return self.__selection
 
-    def hasSelection(self) -> bool:
+    def getHasSelection(self) -> bool:
         return self.__hasSelection
     hasSelectionChanged = QtCore.Signal(bool)
-    hasSelection = QtCore.Property(bool, fget=hasSelection, notify=hasSelectionChanged)
+    hasSelection = QtCore.Property(bool, fget=getHasSelection, notify=hasSelectionChanged)
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def nodes(self):
+    def nodes(self) -> ObjectList[GraphNode]:
         return self.__nodes
 
     @ui_base.ConstProperty(QtCore.QObject)
-    def connections(self):
+    def connections(self) -> ObjectList[GraphConnection]:
         return self.__connections
 
     def mapFromGlobal(self, pos: QtCore.QPointF) -> QtCore.QPointF:
         return (self.__item.mapFromGlobal(pos) - self.offset) / self.zoom
 
     @QtCore.Slot()
-    def selectAll(self):
+    def selectAll(self) -> None:
         self.__selection.select(
             QtCore.QItemSelection(self.__nodes.index(0), self.__nodes.index(self.__nodes.rowCount() - 1)),
             QtCore.QItemSelectionModel.Select)
@@ -167,7 +168,7 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             node.rect = node.rect.translated(delta)
 
     @QtCore.Slot(GraphNodePort, result=list)
-    def getTargetPorts(self, src: GraphNodePort) -> None:
+    def getTargetPorts(self, src: GraphNodePort) -> Sequence[GraphNodePort]:
         ports = []
         for wrapper in self.__nodes:
             for port in wrapper.ports:
@@ -198,11 +199,12 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
         srcPort = src.port.name
         destNode = dest.node.node
         destPort = dest.port.name
-        with self.project.captureChanges("Connect '{}:{}' to '{}:{}'".format(srcNode.title, srcPort, destNode.title, destPort)):
+        with self.project.captureChanges(
+                "Connect '{}:{}' to '{}:{}'".format(srcNode.title, srcPort, destNode.title, destPort)):
             self.model.connectPorts(srcNode, srcPort, destNode, destPort)
 
     @QtCore.Slot(GraphConnection)
-    def disconnectPorts(self, wrapper: GraphConnection):
+    def disconnectPorts(self, wrapper: GraphConnection) -> None:
         self.unhighlightConnection(wrapper)
         conn = wrapper.connection
         with self.project.captureChanges("Disconnect '{}:{}' from '{}:{}'".format(
@@ -231,7 +233,7 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
 
         self.__updateContentRect()
 
-    def __addNode(self, index, node):
+    def __addNode(self, index: int, node: model.GraphNode) -> None:
         nodeDesc = self.app.nodeDB.nodeDescription(node.uri)
         if nodeDesc.ui is not None and nodeDesc.ui.uri is not None:
             wrapperClass = self.app.uiRegistry.getClass(nodeDesc.ui.uri)
@@ -249,13 +251,13 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
         self.__nodeMap[node.id] = wrapper
         self.__nodes.insertObject(index, wrapper)
 
-    def __removeNode(self, index):
+    def __removeNode(self, index: int) -> None:
         wrapper = self.__nodes.removeObject(index)
         wrapper.cleanup()
         self.__nodeMap.pop(wrapper.node.id)
 
     @QtCore.Slot(QtCore.QPointF, str)
-    def insertNode(self, pos: QtCore.QPointF, uri: str):
+    def insertNode(self, pos: QtCore.QPointF, uri: str) -> None:
         desc = self.app.nodeDB.nodeDescription(uri)
         title = desc.display_name or desc.uri
         with self.project.captureChanges("Add node '{}'".format(title)):
@@ -265,13 +267,13 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
                 title=title,
                 rect=QtCore.QRectF(pos, QtCore.QSizeF(100, 100)))
 
-    def __activeNodeChanged(self, node, active):
+    def __activeNodeChanged(self, node: GraphNode, active: bool) -> None:
         if active:
             for n in self.__nodes:
                 if n is not node:
                     n.active = False
 
-    def __selectionChanged(self, selected, deselected):
+    def __selectionChanged(self, selected: QtCore.QItemSelection, deselected: QtCore.QItemSelection) -> None:
         for index in selected.indexes():
             node = self.__nodes.data(index)
             node.selected = True
@@ -292,7 +294,7 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
         else:
             raise TypeError(type(change))
 
-    def __addConnection(self, index, connection):
+    def __addConnection(self, index: int, connection: model.Connection) -> None:
         srcPort = self.__nodeMap[connection.srcNodeId].port(connection.srcPort)
         srcPort.numConnections += 1
         destPort = self.__nodeMap[connection.destNodeId].port(connection.destPort)
@@ -304,7 +306,7 @@ class GraphView(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject)
             context=self.context)
         self.__connections.insertObject(index, wrapper)
 
-    def __removeConnection(self, index):
+    def __removeConnection(self, index: int) -> None:
         wrapper = self.__connections.removeObject(index)
         connection = wrapper.connection
         srcPort = self.__nodeMap[connection.srcNodeId].port(connection.srcPort)

noisicaa/ui/Project.py

@@ -24,7 +24,7 @@ import json
 import logging
 import os
 import os.path
-from typing import Generator
+from typing import Any, Dict, Generator, List, Sequence, Tuple
 
 from PySide2 import QtCore
 from PySide2 import QtWidgets
@@ -40,14 +40,14 @@ logger = logging.getLogger(__name__)
 
 
 class Command(QtWidgets.QUndoCommand):
-    def __init__(self, title, project, changes):
+    def __init__(self, title: str, project: 'Project', changes: Sequence[model_lib.ModelChange]) -> None:
         super().__init__(title)
 
         self.__project = project
         self.__changes = changes
         self.__state = 'created'
 
-    def undo(self):
+    def undo(self) -> None:
         logger.info("undo '%s'", self.text())
         assert self.__state == 'done'
 
@@ -69,7 +69,7 @@ class Command(QtWidgets.QUndoCommand):
 
         self.__state = 'undone'
 
-    def redo(self):
+    def redo(self) -> None:
         # QUndoStack calls Command.redo() when the command is pushed onto the stack. But we already
         # executed the actions, so there's nothing to do here.
         if self.__state == 'created':
@@ -101,7 +101,14 @@ class Command(QtWidgets.QUndoCommand):
 class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
     path, pathChanged = ui_base.Property('path', str)
 
-    def __init__(self, *, path, project, viewState, context: ui_base.CommonContext, **kwargs):
+    def __init__(
+            self, *,
+            path: str,
+            project: model_lib.Project,
+            viewState: Dict[str, Any],
+            context: ui_base.CommonContext,
+            **kwargs: Any
+    ) -> None:
         super().__init__(
             context=ui_base.ProjectContext(
                 app=context.app,
@@ -145,7 +152,10 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
         for node in self.__project.nodes:
             self.__nodeAdded(node)
         for conn in self.__project.connections:
-            self.engine.connect_ports(conn.srcNodeId, conn.srcPort, conn.destNodeId, conn.destPort, engine.PortType.AUDIO)
+            self.engine.connect_ports(
+                conn.srcNodeId, conn.srcPort,
+                conn.destNodeId, conn.destPort,
+                engine.PortType.AUDIO)
         self.engine.compile_graph()
         self.__nodesListener = self.__project.nodesChanged.connect(self.__nodesChanged)
         self.__connectionsListener = self.__project.connectionsChanged.connect(self.__connectionsChanged)
@@ -187,8 +197,8 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
     MAGIC = '# NOISICAA-PROJECT\n'
 
     @classmethod
-    def load(cls, path: str, classRegistry) -> model_lib.Project:
-        with open(path, 'r') as fp:
+    def load(cls, path: str, classRegistry: model_lib.ClassRegistry) -> Tuple[model_lib.Project, Dict[str, Any]]:
+        with open(path, 'r', encoding='utf-8') as fp:
             magic = fp.read(len(cls.MAGIC))
             if magic != cls.MAGIC:
                 raise RuntimeError
@@ -196,9 +206,10 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
             data = json.load(fp)
 
         assert data['format'] == 1, data
-        return model_lib.Project.deserialize(parent=None, serialized=data['project'], classRegistry=classRegistry), data.get('view', {})
+        return model_lib.Project.deserialize(
+            parent=None, serialized=data['project'], classRegistry=classRegistry), data.get('view', {})
 
-    def __save(self, path=None) -> None:
+    def __save(self, path: str = None) -> None:
         if path is None:
             assert self.path is not None
             path = self.path
@@ -216,7 +227,7 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
             'view': view,
             'project': self.__project.serialize(),
         }
-        with open(path, 'w') as fp:
+        with open(path, 'w', encoding='utf-8') as fp:
             fp.write(self.MAGIC)
             json.dump(data, fp, sort_keys=True, indent=2)
             fp.write('\n')
@@ -225,13 +236,13 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
         self.path = path
 
     @QtCore.Slot()
-    def save(self):
+    def save(self) -> None:
         assert self.path is not None
         self.__save(self.path)
         self.app.addRecentProject(self.path)
 
     @QtCore.Slot(str)
-    def saveAs(self, path):
+    def saveAs(self, path: str) -> None:
         logger.info("Save project as...")
 
         if path.startswith('file://'):
@@ -241,7 +252,7 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
 
         self.__save(path)
 
-    def __modelChanged(self, change: model_lib.ModelChange) -> None:
+    def __modelChanged(self, change: model_lib.ModelChange) -> None:  # pylint: disable=unused-argument
         assert self.__in_model_change
 
     @contextlib.contextmanager
@@ -249,7 +260,7 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
         with self.applyChanges():
             logger.info("Beginning change '%s'...", name)
 
-            changes = []
+            changes = []  # type: List[model_lib.ModelChange]
             conn = self.__project.modelChanged.add(changes.append)
 
             try:
@@ -287,13 +298,13 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
         else:
             raise TypeError(type(change))
 
-    def __nodeAdded(self, node):
+    def __nodeAdded(self, node: model_lib.GraphNode) -> None:
         description = self.app.nodeDB.nodeDescription(node.uri)
         self.engine.add_node(node.id, description.Buffer())
         for change in node.initialEngineChanges():
             self.__handleEngineChange(change)
 
-    def __nodeRemoved(self, node):
+    def __nodeRemoved(self, node: model_lib.GraphNode) -> None:
         self.engine.remove_node(node.id)
 
     def __connectionsChanged(self, change: model_lib.PropertyListChange[model_lib.Connection]) -> None:
@@ -302,7 +313,10 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
 
         if isinstance(change, model_lib.PropertyListInsert):
             conn = change.new_value
-            self.engine.connect_ports(conn.srcNodeId, conn.srcPort, conn.destNodeId, conn.destPort, engine.PortType.AUDIO)
+            self.engine.connect_ports(
+                conn.srcNodeId, conn.srcPort,
+                conn.destNodeId, conn.destPort,
+                engine.PortType.AUDIO)
 
         elif isinstance(change, model_lib.PropertyListDelete):
             conn = change.old_value
@@ -311,7 +325,7 @@ class Project(ui_base.ProjectMixin, ui_base.PropertyContainer, QtCore.QObject):
         else:
             raise TypeError(type(change))
 
-    def __handleEngineChange(self, change: model_lib.EngineChange):
+    def __handleEngineChange(self, change: model_lib.EngineChange) -> None:
         if isinstance(change, model_lib.SetControlValue):
             self.engine.set_control_value(change.nodeId, change.portName, change.value)
 

noisicaa/ui/Project_test.py

@@ -21,42 +21,16 @@
 # mypy: allow-untyped-defs
 # pylint: disable=redefined-outer-name
 
-import pytest
-
 from noisicaa import model
-from noisicaa import engine
-from . import Project
-from . import ui_base
-
-
-class MockApp:
-    def __init__(self):
-        self.engine = engine.Engine()
-
-
-@pytest.fixture
-def context():
-    return ui_base.CommonContext(app=MockApp())