class PortSelector(slots.SlotContainer, QtWidgets.QComboBox):
selectedPort, setSelectedPort, selectedPortChanged = slots.slot(str, 'selectedPort')
def __init__(self, device_list: DeviceList, parent: QtWidgets.QWidget) -> None:
super().__init__(parent=parent)
self.__device_list = device_list
self.setInsertPolicy(QtWidgets.QComboBox.NoInsert)
self.setEditable(True)
self.lineEdit().setReadOnly(True)
self.__filter = FilteredDeviceList(device_list)
self.setModel(self.__filter)
view = QtWidgets.QTreeView()
view.setHeaderHidden(True)
self.setView(view)
view.expandAll()
self.currentIndexChanged.connect(lambda: self.setSelectedPort(self.currentData()))
self.selectedPortChanged.connect(self.__updateName)
def __updateName(self, uri: str) -> None:
try:
port_name = self.__device_list.getPort(uri).display_name
except KeyError:
port_name = uri
self.setEditText(port_name)
class GraphView(ui_base.ProjectMixin, slots.SlotContainer, QtWidgets.QWidget):
currentTrack, setCurrentTrack, currentTrackChanged = slots.slot(
music.Track, 'currentTrack', allow_none=True)
def __init__(self, **kwargs: Any) -> None:
super().__init__(**kwargs)
canvas_frame = Frame(parent=self)
self.__canvas = canvas.Canvas(parent=canvas_frame,
context=self.context)
canvas_frame.setWidget(self.__canvas)
self.__toolbox = toolbox.Toolbox(parent=self, context=self.context)
self.__toolbox.toolChanged.connect(self.__canvas.toolChanged)
self.__toolbox.resetViewTriggered.connect(self.__canvas.resetView)
layout = QtWidgets.QHBoxLayout()
layout.setSpacing(0)
layout.setContentsMargins(0, 0, 0, 0)
layout.addWidget(self.__toolbox)
layout.addWidget(canvas_frame)
self.setLayout(layout)
self.currentTrackChanged.connect(self.__canvas.setCurrentTrack)
self.__canvas.currentTrackChanged.connect(self.setCurrentTrack)
class ControlValueConnector(ui_base.ProjectMixin, slots.SlotContainer,
core.AutoCleanupMixin, QtCore.QObject):
value, setValue, valueChanged = slots.slot(float, 'value')
def __init__(self, *, node: music.BaseNode, name: str,
**kwargs: Any) -> None:
super().__init__(**kwargs)
self.__node = node
self.__name = name
self.__listeners = core.ListenerList()
self.add_cleanup_function(self.__listeners.cleanup)
self.__generation = self.__node.control_value_map.generation(
self.__name)
self.setValue(self.__node.control_value_map.value(self.__name))
self.valueChanged.connect(self.__onValueEdited)
self.__listeners.add(
self.__node.control_value_map.control_value_changed.add(
self.__name, self.__onValueChanged))
def __onValueEdited(self, value: float) -> None:
if value != self.__node.control_value_map.value(self.__name):
self.__generation += 1
with self.project.apply_mutations('%s: Change control value "%s"' %
(self.__node.name, self.__name)):
self.__node.set_control_value(self.__name, value,
self.__generation)
def __onValueChanged(
self, change: music.PropertyValueChange[value_types.ControlValue]
) -> None:
if change.new_value.generation < self.__generation:
return
self.__generation = change.new_value.generation
self.setValue(change.new_value.value)
def connect(self, getter: QtCore.pyqtBoundSignal,
setter: Callable[[float], None]) -> None:
getter.connect(self.setValue)
setter(self.value())
self.valueChanged.connect(setter)
class RecordButton(slots.SlotContainer, QtWidgets.QPushButton):
recordState, setRecordState, recordStateChanged = slots.slot(
RecordState, 'recordState')
def __init__(self) -> None:
super().__init__()
self.setText("Record")
self.setIcon(
QtGui.QIcon(
os.path.join(constants.DATA_DIR, 'icons', 'media-record.svg')))
self.__default_bg = self.palette().color(QtGui.QPalette.Button)
self.recordStateChanged.connect(self.__recordStateChanged)
self.__timer = QtCore.QTimer()
self.__timer.setInterval(250)
self.__timer.timeout.connect(self.__blink)
self.__blink_state = False
def __recordStateChanged(self, state: RecordState) -> None:
palette = self.palette()
if state == RecordState.OFF:
self.__timer.stop()
palette.setColor(self.backgroundRole(), self.__default_bg)
elif state == RecordState.WAITING:
self.__timer.start()
self.__blink_state = True
palette.setColor(self.backgroundRole(), QtGui.QColor(0, 255, 0))
elif state == RecordState.RECORDING:
self.__timer.stop()
palette.setColor(self.backgroundRole(), QtGui.QColor(255, 0, 0))
self.setPalette(palette)
def __blink(self) -> None:
self.__blink_state = not self.__blink_state
palette = self.palette()
if self.__blink_state:
palette.setColor(self.backgroundRole(), QtGui.QColor(0, 255, 0))
else:
palette.setColor(self.backgroundRole(), self.__default_bg)
self.setPalette(palette)
class ControlValueEnum(slots.SlotContainer, QtWidgets.QComboBox):
value, setValue, valueChanged = slots.slot(float, 'value', default=0.0)
def __init__(self, **kwargs: Any) -> None:
super().__init__(**kwargs)
self.valueChanged.connect(lambda _: self.__valueChanged())
self.currentIndexChanged.connect(lambda _: self.__currentIndexChanged())
def __valueChanged(self) -> None:
closest_idx = None # type: int
closest_dist = None # type: float
for idx in range(self.count()):
value = self.itemData(idx)
dist = abs(value - self.value())
if closest_idx is None or dist < closest_dist:
closest_idx = idx
closest_dist = dist
if closest_idx is not None:
self.setCurrentIndex(closest_idx)
def __currentIndexChanged(self) -> None:
self.setValue(self.currentData())
class TrackLabel(slots.SlotContainer, QtWidgets.QLabel):
isCurrent, setIsCurrent, isCurrentChanged = slots.slot(bool,
'isCurrent',
default=False)
def __init__(self, parent: QtWidgets.QWidget) -> None:
super().__init__(parent=parent)
self.setAttribute(Qt.WA_TransparentForMouseEvents, True)
self.setFrameStyle(QtWidgets.QFrame.Panel | QtWidgets.QFrame.Raised)
self.setBackgroundRole(QtGui.QPalette.Window)
self.setAutoFillBackground(True)
self.isCurrentChanged.connect(lambda current: self.setBackgroundRole(
QtGui.QPalette.Highlight if current else QtGui.QPalette.Window))
font = QtGui.QFont(self.font())
font.setPointSizeF(0.8 * font.pointSizeF())
self.setFont(font)
def setText(self, text: str) -> None:
super().setText(text)
self.resize(self.sizeHint())
class GainSlider(slots.SlotContainer, QtWidgets.QWidget):
orientation, setOrientation, orientationChanged = slots.slot(
Qt.Orientation, 'orientation', default=Qt.Horizontal)
value, setValue, valueChanged = slots.slot(float, 'value', default=0.0)
default, setDefault, defaultChanged = slots.slot(float,
'default',
default=0.0)
minimum, setMinimum, minimumChanged = slots.slot(float,
'minimum',
default=-20.0)
maximum, setMaximum, maximumChanged = slots.slot(float,
'maximum',
default=20.0)
def __init__(self, parent: Optional[QtWidgets.QWidget]) -> None:
super().__init__(parent=parent)
self.orientationChanged.connect(lambda _: self.update())
self.valueChanged.connect(lambda _: self.update())
self.maximumChanged.connect(lambda _: self.update())
self.minimumChanged.connect(lambda _: self.update())
self.__display_func = lambda value: '%.2f' % value
self.__dragging = False
self.__drag_pos = None # type: QtCore.QPoint
def sizeHint(self) -> QtCore.QSize:
return QtCore.QSize(50, 50)
def minimumSizeHint(self) -> QtCore.QSize:
if self.orientation() == Qt.Horizontal:
return QtCore.QSize(100, 24)
else:
return QtCore.QSize(24, 100)
def setRange(self, minimum: float, maximum: float) -> None:
self.setMinimum(minimum)
self.setMaximum(maximum)
def setDisplayFunc(self, func: Callable[[float], str]) -> None:
self.__display_func = func
self.update()
def normalizedValue(self) -> float:
return self.normalize(self.value())
def normalize(self, value: float) -> float:
value = max(self.minimum(), min(value, self.maximum()))
return (value - self.minimum()) / (self.maximum() - self.minimum())
def denormalize(self, value: float) -> float:
value = max(0.0, min(value, 1.0))
return (self.maximum() - self.minimum()) * value + self.minimum()
def normalizedValueToOffset(self, value: float) -> int:
if self.orientation() == Qt.Horizontal:
return int((self.width() - 5) * value)
else:
return int((self.height() - 5) * value)
def valueToOffset(self, value: float) -> int:
if self.orientation() == Qt.Horizontal:
return int((self.width() - 5) * self.normalize(value))
else:
return int((self.height() - 5) * self.normalize(value))
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
w, h = self.width(), self.height()
value = self.normalizedValue()
painter = QtGui.QPainter(self)
try:
painter.setRenderHints(QtGui.QPainter.Antialiasing
| QtGui.QPainter.TextAntialiasing)
painter.fillRect(0, 0, w, h, Qt.black)
if self.orientation() == Qt.Horizontal:
show_ticks = (w > 200) and (h > 20)
if show_ticks:
m = self.minimum()
while m <= self.maximum():
x = self.valueToOffset(m)
painter.fillRect(x + 2, 2, 1, h - 4,
QtGui.QColor(60, 60, 60))
m += 5.0
x = self.normalizedValueToOffset(value)
painter.fillRect(2, 2, x, h - 4, QtGui.QColor(100, 100, 255))
painter.fillRect(x + 2, 2, 1, h - 4,
QtGui.QColor(255, 100, 100))
if show_ticks:
m = self.minimum()
while m <= self.maximum():
x = self.valueToOffset(m)
painter.fillRect(x + 2, 2, 1, 4,
QtGui.QColor(255, 255, 255))
painter.fillRect(x + 2, h - 6, 1, 4,
QtGui.QColor(255, 255, 255))
m += 5.0
else:
show_ticks = (h > 200) and (w > 20)
if show_ticks:
m = self.minimum()
while m <= self.maximum():
y = self.valueToOffset(m)
painter.fillRect(2, h - y - 3, w - 4, 1,
QtGui.QColor(60, 60, 60))
m += 5.0
y = self.normalizedValueToOffset(value)
painter.fillRect(2, h - y - 2, w - 4, y,
QtGui.QColor(100, 100, 255))
painter.fillRect(2, h - y - 3, w - 4, 1,
QtGui.QColor(255, 100, 100))
if show_ticks:
m = self.minimum()
while m <= self.maximum():
y = self.valueToOffset(m)
painter.fillRect(2, h - y - 3, 4, 1,
QtGui.QColor(255, 255, 255))
painter.fillRect(w - 6, h - y - 3, 4, 1,
QtGui.QColor(255, 255, 255))
m += 5.0
if w > 60 and h > 14:
font = QtGui.QFont("Arial")
font.setPixelSize(12)
painter.setFont(font)
label = self.__display_func(self.value())
fm = QtGui.QFontMetrics(font)
r = fm.boundingRect(label)
r.moveTopLeft(
QtCore.QPoint(
int((w - r.width()) / 2 + r.left()),
int((h - r.height()) / 2 + 1.5 * fm.capHeight())))
pen = QtGui.QPen()
pen.setColor(Qt.black)
painter.setPen(pen)
for x, y, in [(-1, 0), (1, 0), (0, -1), (0, 1)]:
painter.drawText(r.topLeft() + QtCore.QPoint(x, y), label)
pen = QtGui.QPen()
pen.setColor(Qt.white)
painter.setPen(pen)
painter.drawText(r.topLeft(), label)
finally:
painter.end()
def mouseDoubleClickEvent(self, evt: QtGui.QMouseEvent) -> None:
if evt.button() == Qt.LeftButton:
self.setValue(self.default())
def mousePressEvent(self, evt: QtGui.QMouseEvent) -> None:
if evt.button() == Qt.LeftButton:
self.__dragging = True
self.__drag_pos = self.mapToGlobal(evt.pos())
if not evt.modifiers() & Qt.ShiftModifier:
if self.orientation() == Qt.Horizontal:
self.setValue(
self.denormalize(
(evt.pos().x() - 2) / (self.width() - 5)))
else:
self.setValue(
self.denormalize(1.0 - (evt.pos().y() - 2) /
(self.height() - 5)))
evt.accept()
return
super().mousePressEvent(evt)
def mouseMoveEvent(self, evt: QtGui.QMouseEvent) -> None:
if self.__dragging:
delta_p = (self.mapToGlobal(evt.pos()) - self.__drag_pos)
self.__drag_pos = self.mapToGlobal(evt.pos())
if evt.modifiers() & Qt.ShiftModifier:
if self.orientation() == Qt.Horizontal:
delta = delta_p.x()
else:
delta = -delta_p.y()
step_size = 0.0001
value = self.denormalize(self.normalizedValue() +
delta * step_size)
value = max(self.minimum(), min(value, self.maximum()))
self.setValue(value)
else:
if self.orientation() == Qt.Horizontal:
self.setValue(
self.denormalize(
(evt.pos().x() - 2) / (self.width() - 5)))
else:
self.setValue(
self.denormalize(1.0 - (evt.pos().y() - 2) /
(self.height() - 5)))
evt.accept()
return
super().mouseMoveEvent(evt)
def mouseReleasevent(self, evt: QtGui.QMouseEvent) -> None:
if self.__dragging and evt.button() == Qt.LeftButton:
self.__dragging = False
evt.accept()
return
super().mouseReleaseEvent(evt)
class StepToggle(slots.SlotContainer, QtWidgets.QWidget):
checked, setChecked, checkedChanged = slots.slot(bool,
'checked',
default=False)
def __init__(self, parent: Optional[QtWidgets.QWidget] = None) -> None:
super().__init__(parent=parent)
self.checkedChanged.connect(lambda _: self.update())
def sizeHint(self) -> QtCore.QSize:
return QtCore.QSize(50, 50)
def minimumSizeHint(self) -> QtCore.QSize:
return QtCore.QSize(32, 32)
def hasHeightForWidth(self) -> bool:
return True
def heightForWidth(self, w: int) -> int:
return w
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
w = self.width()
h = self.height()
painter = QtGui.QPainter(self)
try:
painter.setRenderHints(QtGui.QPainter.Antialiasing
| QtGui.QPainter.TextAntialiasing)
if self.isEnabled():
border_color = QtGui.QColor(0, 0, 0)
bg_color = QtGui.QColor(200, 200, 200)
button_color = QtGui.QColor(100, 100, 255)
else:
border_color = QtGui.QColor(80, 80, 80)
bg_color = QtGui.QColor(120, 120, 120)
button_color = QtGui.QColor(80, 80, 80)
pen = QtGui.QPen()
pen.setColor(border_color)
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(QtGui.QBrush(bg_color))
painter.drawRoundedRect(1, 1, w - 2, h - 2, 4, 4)
if self.checked():
painter.fillRect(4, 4, w - 8, h - 8, button_color)
finally:
painter.end()
def mousePressEvent(self, evt: QtGui.QMouseEvent) -> None:
if evt.button() == Qt.LeftButton:
self.setChecked(not self.checked())
evt.accept()
return
super().mousePressEvent(evt)
class TrackListView(ui_base.ProjectMixin, slots.SlotContainer,
QtWidgets.QSplitter):
playingChanged = QtCore.pyqtSignal(bool)
loopEnabledChanged = QtCore.pyqtSignal(bool)
currentTrack, setCurrentTrack, currentTrackChanged = slots.slot(
music.Track, 'currentTrack', allow_none=True)
def __init__(self, *, project_view: 'project_view_lib.ProjectView',
player_state: player_state_lib.PlayerState,
**kwargs: Any) -> None:
super().__init__(**kwargs)
self.__project_view = project_view
self.__player_state = player_state
self.__session_prefix = 'tracklist:%s:' % self.project.id
self.__session_data_last_update = {} # type: Dict[str, float]
editor_frame = Frame(self)
self.__editor = editor.Editor(player_state=self.__player_state,
parent=editor_frame,
context=self.context)
editor_frame.setWidget(self.__editor)
self.__editor.currentTrackChanged.connect(self.setCurrentTrack)
self.currentTrackChanged.connect(self.__editor.setCurrentTrack)
self.__editor.setScaleX(
self.__get_session_value('scale_x', self.__editor.scaleX()))
self.__editor.setXOffset(self.__get_session_value('x_offset', 0))
self.__editor.setYOffset(self.__get_session_value('y_offset', 0))
self.__editor.scaleXChanged.connect(self.__updateScaleX)
time_line_frame = Frame(self)
self.__time_line = time_line.TimeLine(parent=time_line_frame,
player_state=self.__player_state,
context=self.context)
time_line_frame.setWidget(self.__time_line)
self.__time_line.setScaleX(self.__editor.scaleX())
self.__time_line.setXOffset(self.__editor.xOffset())
self.__editor.scaleXChanged.connect(self.__time_line.setScaleX)
self.__time_line.setAdditionalXOffset(self.__editor.sidebarWidth())
self.__editor.sidebarWidthChanged.connect(
self.__time_line.setAdditionalXOffset)
scroll_x = QtWidgets.QScrollBar(orientation=Qt.Horizontal, parent=self)
scroll_x.setRange(0, self.__editor.maximumXOffset())
scroll_x.setSingleStep(50)
scroll_x.setPageStep(self.__editor.pageWidth())
scroll_x.setValue(self.__editor.xOffset())
scroll_y = QtWidgets.QScrollBar(orientation=Qt.Vertical, parent=self)
scroll_y.setRange(0, self.__editor.maximumYOffset())
scroll_y.setSingleStep(20)
scroll_y.setPageStep(self.__editor.pageHeight())
scroll_y.setValue(self.__editor.yOffset())
self.__editor.maximumXOffsetChanged.connect(scroll_x.setMaximum)
self.__editor.pageWidthChanged.connect(scroll_x.setPageStep)
self.__editor.xOffsetChanged.connect(scroll_x.setValue)
self.__time_line.xOffsetChanged.connect(scroll_x.setValue)
scroll_x.valueChanged.connect(self.__editor.setXOffset)
scroll_x.valueChanged.connect(self.__time_line.setXOffset)
scroll_x.valueChanged.connect(self.__updateXOffset)
self.__editor.maximumYOffsetChanged.connect(scroll_y.setMaximum)
self.__editor.pageHeightChanged.connect(scroll_y.setPageStep)
self.__editor.yOffsetChanged.connect(scroll_y.setValue)
scroll_y.valueChanged.connect(self.__editor.setYOffset)
scroll_y.valueChanged.connect(self.__updateYOffset)
self.setMinimumHeight(time_line_frame.minimumHeight())
editor_pane = QtWidgets.QWidget(self)
layout = QtWidgets.QGridLayout()
layout.setContentsMargins(0, 0, 0, 0)
layout.setSpacing(1)
layout.addWidget(time_line_frame, 0, 0, 1, 1)
layout.addWidget(editor_frame, 1, 0, 1, 1)
layout.addWidget(scroll_x, 2, 0, 1, 1)
layout.addWidget(scroll_y, 1, 1, 1, 1)
editor_pane.setLayout(layout)
self.__toolbox = toolbox.Toolbox(parent=self, context=self.context)
self.__toolbox.setCurrentToolBox(self.__editor.currentToolBox())
self.__editor.currentToolBoxChanged.connect(
self.__toolbox.setCurrentToolBox)
self.addWidget(self.__toolbox)
self.setStretchFactor(0, 0)
self.addWidget(editor_pane)
self.setStretchFactor(1, 1)
self.setCollapsible(1, False)
def __get_session_value(self, key: str, default: Any) -> Any:
return self.get_session_value(self.__session_prefix + key, default)
def __set_session_value(self, key: str, value: Any) -> None:
self.set_session_value(self.__session_prefix + key, value)
def __lazy_set_session_value(self, key: str, value: Any) -> None:
# TODO: value should be stored to session 5sec after most recent change. I.e. need
# some timer...
last_time = self.__session_data_last_update.get(key, 0)
if time_lib.time() - last_time > 5:
self.__set_session_value(key, value)
self.__session_data_last_update[key] = time_lib.time()
def __updateScaleX(self, scale: fractions.Fraction) -> None:
self.__set_session_value('scale_x', scale)
def __updateXOffset(self, offset: int) -> None:
self.__lazy_set_session_value('x_offset', offset)
def __updateYOffset(self, offset: int) -> None:
self.__lazy_set_session_value('y_offset', offset)
def setPlayerID(self, player_id: str) -> None:
self.__time_line.setPlayerID(player_id)
def cleanup(self) -> None:
self.__editor.cleanup()
class BaseTrackEditor(time_view_mixin.TimeViewMixin, ui_base.ProjectMixin,
core.AutoCleanupMixin, slots.SlotContainer,
QtWidgets.QWidget):
sizeChanged = QtCore.pyqtSignal(QtCore.QSize)
currentToolChanged = QtCore.pyqtSignal(tools.ToolType)
playbackPosition, setPlaybackPosition, playbackPositionChanged = slots.slot(
audioproc.MusicalTime,
'playbackPosition',
default=audioproc.MusicalTime(-1, 1))
isCurrent, setIsCurrent, isCurrentChanged = slots.slot(bool,
'isCurrent',
default=False)
defaultHeight, setDefaultHeight, defaultHeightChanged = slots.slot(
int, 'defaultHeight', default=200)
zoom, setZoom, zoomChanged = slots.slot(fractions.Fraction,
'zoom',
default=fractions.Fraction(1, 1))
def __init__(self, *, track: music.Track,
player_state: player_state_lib.PlayerState,
editor: 'editor_lib.Editor', **kwargs: Any) -> None:
self.__auto_scroll = True
super().__init__(parent=editor, **kwargs)
self.setMouseTracking(True)
self.setMinimumHeight(10)
self.setMaximumHeight(1000)
self.__track = track
self.__player_state = player_state
self.__editor = editor
self.__zoom = fractions.Fraction(1, 1)
self._bg_color = QtGui.QColor(255, 255, 255)
self.isCurrentChanged.connect(self.__isCurrentChanged)
self.__isCurrentChanged(self.isCurrent())
self.scaleXChanged.connect(lambda _: self.__scaleChanged())
self.zoomChanged.connect(lambda _: self.__scaleChanged())
self.__scaleChanged()
self.__toolbox = self.createToolBox()
self.currentToolChanged.emit(self.__toolbox.currentToolType())
self.__toolbox.toolTypeChanged.connect(self.currentToolChanged.emit)
@property
def track(self) -> music.Track:
return self.__track
def setAutoScroll(self, auto_scroll: bool) -> None:
self.__auto_scroll = auto_scroll
def setXOffset(self, offset: int) -> int:
dx = super().setXOffset(offset)
if self.__auto_scroll:
self.scroll(dx, 0)
return dx
def __scaleChanged(self) -> None:
self.updateSize()
self.purgePaintCaches()
self.update()
def offset(self) -> QtCore.QPoint:
return QtCore.QPoint(self.xOffset(), 0)
def updateSize(self) -> None:
pass
def __isCurrentChanged(self, is_current: bool) -> None:
if is_current:
self._bg_color = QtGui.QColor(240, 240, 255)
else:
self._bg_color = QtGui.QColor(255, 255, 255)
self.update()
def purgePaintCaches(self) -> None:
pass
def createToolBox(self) -> tools.ToolBox:
raise NotImplementedError
def toolBox(self) -> tools.ToolBox:
return self.__toolbox
def currentTool(self) -> tools.ToolBase:
return self.__toolbox.currentTool()
def currentToolType(self) -> tools.ToolType:
return self.__toolbox.currentToolType()
def setCurrentToolType(self, tool: tools.ToolType) -> None:
self.__toolbox.setCurrentToolType(tool)
def playerState(self) -> player_state_lib.PlayerState:
return self.__player_state
def resizeEvent(self, evt: QtGui.QResizeEvent) -> None:
self.sizeChanged.emit(evt.size())
super().resizeEvent(evt)
def _paint(self, painter: QtGui.QPainter, rect: QtCore.QRect) -> None:
painter.setRenderHints(QtGui.QPainter.Antialiasing
| QtGui.QPainter.TextAntialiasing)
font = QtGui.QFont("Arial")
font.setPixelSize(14)
painter.setFont(font)
pen = QtGui.QPen()
pen.setColor(Qt.black)
painter.setPen(pen)
painter.drawText(
QtCore.QRect(0, 0, self.width(), self.height()), Qt.AlignCenter,
"%s.paintEvent() not implemented" % type(self).__name__)
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
painter = QtGui.QPainter(self)
try:
painter.fillRect(evt.rect(), self._bg_color)
painter.translate(-self.xOffset(), 0)
self._paint(painter, evt.rect().translated(self.xOffset(), 0))
finally:
painter.end()
def _makeMouseEvent(self, evt: QtGui.QMouseEvent) -> QtGui.QMouseEvent:
return QtGui.QMouseEvent(evt.type(),
evt.localPos() + self.offset(),
evt.windowPos(), evt.screenPos(),
evt.button(), evt.buttons(), evt.modifiers())
def contextMenuEvent(self, evt: QtGui.QContextMenuEvent) -> None:
evt = QtGui.QContextMenuEvent(evt.reason(),
evt.pos() + self.offset(),
evt.globalPos(), evt.modifiers())
self.__toolbox.contextMenuEvent(evt)
def mouseMoveEvent(self, evt: QtGui.QMouseEvent) -> None:
self.__toolbox.mouseMoveEvent(self._makeMouseEvent(evt))
def mousePressEvent(self, evt: QtGui.QMouseEvent) -> None:
self.__editor.setCurrentTrack(self.track)
self.__toolbox.mousePressEvent(self._makeMouseEvent(evt))
def mouseReleaseEvent(self, evt: QtGui.QMouseEvent) -> None:
self.__toolbox.mouseReleaseEvent(self._makeMouseEvent(evt))
def mouseDoubleClickEvent(self, evt: QtGui.QMouseEvent) -> None:
self.__toolbox.mouseDoubleClickEvent(self._makeMouseEvent(evt))
def wheelEvent(self, evt: QtGui.QWheelEvent) -> None:
evt = QtGui.QWheelEvent(evt.pos() + self.offset(), evt.globalPos(),
evt.pixelDelta(), evt.angleDelta(), 0,
Qt.Horizontal, evt.buttons(), evt.modifiers(),
evt.phase(), evt.source())
self.__toolbox.wheelEvent(evt)
def keyPressEvent(self, evt: QtGui.QKeyEvent) -> None:
self.__toolbox.keyPressEvent(evt)
def keyReleaseEvent(self, evt: QtGui.QKeyEvent) -> None:
self.__toolbox.keyReleaseEvent(evt)
class Editor(object_list_manager.ObjectListManager[music.Track,
TrackContainer],
time_view_mixin.TimeViewMixin, ui_base.ProjectMixin,
slots.SlotContainer, core.AutoCleanupMixin, QtWidgets.QWidget):
maximumYOffsetChanged = QtCore.pyqtSignal(int)
yOffsetChanged = QtCore.pyqtSignal(int)
pageHeightChanged = QtCore.pyqtSignal(int)
currentToolBoxChanged = QtCore.pyqtSignal(tools.ToolBox)
currentTrackChanged = QtCore.pyqtSignal(object)
playbackPosition, setPlaybackPosition, playbackPositionChanged = slots.slot(
audioproc.MusicalTime,
'playbackPosition',
default=audioproc.MusicalTime(-1, 1))
sidebarWidth, setSidebarWidth, sidebarWidthChanged = slots.slot(
int, 'sidebarWidth', default=12)
zoom, setZoom, zoomChanged = slots.slot(fractions.Fraction,
'zoom',
default=fractions.Fraction(1, 1))
MIN_ZOOM = fractions.Fraction(2, 3)**12
MAX_ZOOM = fractions.Fraction(3, 2)**2
def __init__(self, *, player_state: player_state_lib.PlayerState,
**kwargs: Any) -> None:
self.__player_state = player_state
self.__current_tool_box = None # type: tools.ToolBox
self.__current_tool = None # type: tools.ToolBase
self.__y_offset = 0
super().__init__(**kwargs)
self.setMouseTracking(True)
self.setFocusPolicy(Qt.StrongFocus)
self.setMinimumWidth(50)
self.setMinimumHeight(0)
self.__in_track_resize = False
self.__moving_track = None # type: TrackContainer
self.__moving_track_pos = None # type: int
self.__moving_track_insert_index = None # type: int
self.__auto_scroll_dy = 0
self.__auto_scroll_timer = QtCore.QTimer(self)
self.__auto_scroll_timer.setInterval(1000 // 50)
self.__auto_scroll_timer.timeout.connect(self.__autoScrollTick)
self.initObjectList(self.project, 'nodes')
self.__content_height = 0
self.__updateTracks()
self.objectListChanged.connect(self.__updateTracks)
self.sidebarWidthChanged.connect(self.__updateTracks)
self.__current_track = None # type: music.Track
for idx, container in enumerate(self.objectWrappers()):
if idx == 0:
self.__onCurrentTrackChanged(container.track)
self.currentTrackChanged.connect(self.__onCurrentTrackChanged)
self.__player_state.currentTimeChanged.connect(
self.setPlaybackPosition)
self.setZoom(
self.get_session_value('tracklist:%s:zoom' % self.project.id,
fractions.Fraction(1, 1)))
self.zoomChanged.connect(
functools.partial(self.set_session_value,
'tracklist:%s:zoom' % self.project.id))
self.zoomChanged.connect(lambda _: self.__updateTracks())
self.__increase_scale_x_action = QtWidgets.QAction(self)
self.__increase_scale_x_action.setShortcut("ctrl+left")
self.__increase_scale_x_action.setShortcutContext(Qt.WindowShortcut)
self.__increase_scale_x_action.triggered.connect(
functools.partial(self.__setScaleX, fractions.Fraction(2, 3)))
self.addAction(self.__increase_scale_x_action)
self.__decrease_scale_x_action = QtWidgets.QAction(self)
self.__decrease_scale_x_action.setShortcut("ctrl+right")
self.__decrease_scale_x_action.setShortcutContext(Qt.WindowShortcut)
self.__decrease_scale_x_action.triggered.connect(
functools.partial(self.__setScaleX, fractions.Fraction(3, 2)))
self.addAction(self.__decrease_scale_x_action)
self.__increase_zoom_action = QtWidgets.QAction(self)
self.__increase_zoom_action.setShortcut("ctrl++")
self.__increase_zoom_action.setShortcutContext(
Qt.WidgetWithChildrenShortcut)
self.__increase_zoom_action.triggered.connect(
functools.partial(self.__scaleZoom, fractions.Fraction(3, 2)))
self.addAction(self.__increase_zoom_action)
self.__decrease_zoom_action = QtWidgets.QAction(self)
self.__decrease_zoom_action.setShortcut("ctrl+-")
self.__decrease_zoom_action.setShortcutContext(
Qt.WidgetWithChildrenShortcut)
self.__decrease_zoom_action.triggered.connect(
functools.partial(self.__scaleZoom, fractions.Fraction(2, 3)))
self.addAction(self.__decrease_zoom_action)
self.__reset_zoom_action = QtWidgets.QAction(self)
self.__reset_zoom_action.setShortcut("ctrl+0")
self.__reset_zoom_action.setShortcutContext(
Qt.WidgetWithChildrenShortcut)
self.__reset_zoom_action.triggered.connect(self.__resetZoom)
self.addAction(self.__reset_zoom_action)
def __setScaleX(self, factor: fractions.Fraction) -> None:
new_scale_x = self.scaleX() * factor
new_scale_x = max(fractions.Fraction(5, 1), new_scale_x)
new_scale_x = min(fractions.Fraction(10000, 1), new_scale_x)
center_time = max(
0,
self.width() // 2 - self.leftMargin() +
self.xOffset()) / self.scaleX()
self.setScaleX(new_scale_x)
center_x = self.leftMargin() + int(self.scaleX() * center_time)
self.setXOffset(max(0, center_x - self.width() // 2))
def __setZoom(self, zoom: fractions.Fraction) -> None:
if zoom == self.zoom():
return
center_y = (self.yOffset() + self.height() // 2) / self.zoom()
self.setZoom(zoom)
self.setYOffset(
max(
0,
min(self.maximumYOffset(),
int(center_y * self.zoom()) - self.height() // 2)))
def __scaleZoom(self, factor: fractions.Fraction) -> None:
new_zoom = self.zoom() * factor
new_zoom = max(self.MIN_ZOOM, new_zoom)
new_zoom = min(self.MAX_ZOOM, new_zoom)
self.__setZoom(new_zoom)
self.__setScaleX(factor)
def __resetZoom(self) -> None:
self.__setScaleX(1 / self.zoom())
self.__setZoom(fractions.Fraction(1, 1))
def __autoScrollTick(self) -> None:
self.setYOffset(
max(
0,
min(self.maximumYOffset(),
self.yOffset() + self.__auto_scroll_dy)))
def setAutoScroll(self, dy: int) -> None:
self.__auto_scroll_dy = dy
if self.__auto_scroll_dy and self.isVisible():
self.__auto_scroll_timer.start()
else:
self.__auto_scroll_timer.stop()
def currentTrack(self) -> music.Track:
return self.__current_track
def setCurrentTrack(self, track: music.Track) -> None:
if track is self.__current_track:
return
if self.__current_track is not None:
container = self.objectWrapperById(self.__current_track.id)
container.setIsCurrent(False)
self.__current_track = None
if track is not None:
container = self.objectWrapperById(track.id)
container.setIsCurrent(True)
self.__current_track = track
if container.track.visible and self.isVisible():
track_y = container.track_editor.y() + self.yOffset()
yoffset = self.yOffset()
if track_y + container.track_editor.height(
) > yoffset + self.height():
yoffset = track_y + container.track_editor.height(
) - self.height()
if track_y < yoffset:
yoffset = track_y
self.setYOffset(yoffset)
self.currentTrackChanged.emit(self.__current_track)
def _filterObject(self, obj: music.ObjectBase) -> bool:
return isinstance(obj, music.Track)
def _createObjectWrapper(self, track: music.Track) -> TrackContainer:
container = TrackContainer(editor=self,
track=track,
player_state=self.__player_state,
context=self.context)
container.visibilityChanged.connect(lambda _: self.__updateTracks())
return container
def _deleteObjectWrapper(self, container: TrackContainer) -> None:
if container.track is self.__current_track:
self.setCurrentTrack(None)
container.cleanup()
def __updateTracks(self) -> None:
separator_height = max(1, min(8, int(self.zoom() * 4)))
tracks = [] # type: List[Tuple[TrackContainer, int]]
moving_track_height = 0
content_height = 0
for container in self.objectWrappers():
if not container.track.visible:
container.hide()
continue
if not tracks:
content_height += separator_height
track_height = max(5, int(self.zoom() * container.height))
track_height = min(container.track_editor.maximumHeight(),
track_height)
track_height = max(container.track_editor.minimumHeight(),
track_height)
if container is self.__moving_track:
moving_track_height = track_height
tracks.append((container, track_height))
content_height += track_height + separator_height
if self.__in_track_resize:
content_height = max(content_height, self.__content_height)
if content_height != self.__content_height:
self.__content_height = content_height
self.maximumYOffsetChanged.emit(
max(0, self.__content_height - self.height()))
if self.__content_height >= self.height():
y = -self.yOffset()
else:
y = (self.height() - self.__content_height) // 2
y += separator_height
show_top_sep = True
moving_track_inserted = False
for container, track_height in tracks:
if container is self.__moving_track:
container.setTrackGeometry(
QtCore.QRect(0, self.__moving_track_pos,
self.width(), track_height),
self.sidebarWidth(), separator_height, True)
show_top_sep = True
else:
if (not moving_track_inserted
and self.__moving_track is not None
and self.__moving_track_pos < y + track_height // 2):
y += moving_track_height + separator_height
if container.track.index > self.__moving_track.track.index:
self.__moving_track_insert_index = container.track.index - 1
else:
self.__moving_track_insert_index = container.track.index
moving_track_inserted = True
container.setTrackGeometry(
QtCore.QRect(0, y, self.width(), track_height),
self.sidebarWidth(), separator_height, show_top_sep)
show_top_sep = False
y += track_height + separator_height
if not moving_track_inserted and self.__moving_track is not None:
self.__moving_track_insert_index = len(self.project.nodes) - 1
if self.__moving_track is not None:
self.__moving_track.raise_()
def beginTrackResize(self) -> None:
self.__in_track_resize = True
def endTrackResize(self) -> None:
self.__in_track_resize = False
self.__updateTracks()
def setTrackHeight(self, container: TrackContainer, height: int) -> None:
h = fractions.Fraction(height) / self.zoom()
h = min(container.track_editor.maximumHeight(), h)
h = max(container.track_editor.minimumHeight(), h)
if h != container.height:
container.setHeight(h)
self.__updateTracks()
def beginTrackMove(self, container: TrackContainer) -> None:
self.__moving_track = container
self.__moving_track_pos = container.track_editor.pos().y()
self.__moving_track_insert_index = None
self.__updateTracks()
def endTrackMove(self) -> None:
assert self.__moving_track is not None
if self.__moving_track_insert_index is not None:
moving_track = self.__moving_track
new_index = self.__moving_track_insert_index
self.__moving_track = None
self.__moving_track_insert_index = None
with self.project.apply_mutations('Move track "%s"' %
moving_track.track.name):
self.project.nodes.move(moving_track.track.index, new_index)
self.__updateTracks()
def moveTrack(self, pos: int) -> None:
self.__moving_track_pos = pos
self.__updateTracks()
def __onCurrentTrackChanged(self, track: music.Track) -> None:
if track is not None:
container = self.objectWrapperById(track.id)
self.setCurrentToolBox(container.track_editor.toolBox())
else:
self.setCurrentToolBox(None)
def currentToolBox(self) -> tools.ToolBox:
return self.__current_tool_box
def setCurrentToolBox(self, toolbox: tools.ToolBox) -> None:
if self.__current_tool_box is toolbox:
return
logger.debug("Switching to tool box %s", type(toolbox).__name__)
if self.__current_tool_box is not None:
self.__current_tool_box.currentToolChanged.disconnect(
self.__onCurrentToolChanged)
self.__onCurrentToolChanged(None)
self.__current_tool_box = None
if toolbox is not None:
self.__current_tool_box = toolbox
self.__onCurrentToolChanged(self.__current_tool_box.currentTool())
self.__current_tool_box.currentToolChanged.connect(
self.__onCurrentToolChanged)
self.currentToolBoxChanged.emit(self.__current_tool_box)
def __onCurrentToolChanged(self, tool: tools.ToolBase) -> None:
if tool is self.__current_tool:
return
logger.debug("Current tool: %s", tool)
if self.__current_tool is not None:
self.__current_tool.cursorChanged.disconnect(
self.__onToolCursorChanged)
self.__onToolCursorChanged(None)
self.__current_tool = None
if tool is not None:
self.__current_tool = tool
self.__onToolCursorChanged(self.__current_tool.cursor())
self.__current_tool.cursorChanged.connect(
self.__onToolCursorChanged)
def __onToolCursorChanged(self, cursor: QtGui.QCursor) -> None:
logger.debug("Cursor changed: %s", cursor)
if cursor is not None:
self.setCursor(cursor)
else:
self.setCursor(QtGui.QCursor(Qt.ArrowCursor))
def maximumYOffset(self) -> int:
return max(0, self.__content_height - self.height())
def pageHeight(self) -> int:
return self.height()
def yOffset(self) -> int:
return self.__y_offset
def setYOffset(self, offset: int) -> None:
if offset == self.__y_offset:
return
self.__y_offset = offset
self.yOffsetChanged.emit(self.__y_offset)
self.__updateTracks()
def offset(self) -> QtCore.QPoint:
return QtCore.QPoint(self.xOffset(), self.__y_offset)
def resizeEvent(self, evt: QtGui.QResizeEvent) -> None:
super().resizeEvent(evt)
self.maximumYOffsetChanged.emit(
max(0, self.__content_height - self.height()))
self.pageHeightChanged.emit(self.height())
self.__updateTracks()
def wheelEvent(self, evt: QtGui.QWheelEvent) -> None:
if evt.modifiers() == Qt.ShiftModifier:
offset = self.xOffset()
offset -= 2 * evt.angleDelta().y()
offset = min(self.maximumXOffset(), offset)
offset = max(0, offset)
self.setXOffset(offset)
evt.accept()
return
elif evt.modifiers() == Qt.ControlModifier:
offset = self.yOffset()
offset -= evt.angleDelta().y()
offset = min(self.maximumYOffset(), offset)
offset = max(0, offset)
self.setYOffset(offset)
evt.accept()
return
super().wheelEvent(evt)
class TrackHandle(slots.SlotContainer, QtWidgets.QWidget):
isCurrent, setIsCurrent, isCurrentChanged = slots.slot(bool,
'isCurrent',
default=False)
def __init__(self, *, editor: 'Editor', container: 'TrackContainer',
**kwargs: Any) -> None:
super().__init__(parent=editor, **kwargs)
self.__editor = editor
self.__container = container
self.__click_pos = None # type: QtCore.QPoint
self.setCursor(Qt.OpenHandCursor)
self.isCurrentChanged.connect(lambda _: self.update())
def mousePressEvent(self, evt: QtGui.QMouseEvent) -> None:
self.__editor.setCurrentTrack(self.__container.track)
if evt.button() == Qt.LeftButton:
self.__click_pos = evt.pos()
self.__editor.beginTrackMove(self.__container)
self.setCursor(Qt.ClosedHandCursor)
evt.accept()
def mouseMoveEvent(self, evt: QtGui.QMouseEvent) -> None:
if self.__click_pos is not None:
mpos = self.mapTo(self.__editor, evt.pos()).y()
if mpos < 20:
self.__editor.setAutoScroll(-min(20, (20 - mpos) // 2))
elif mpos > self.__editor.height() - 20:
self.__editor.setAutoScroll(
min(20, (mpos - self.__editor.height() + 20) // 2))
else:
self.__editor.setAutoScroll(0)
pos = self.mapTo(self.__editor, evt.pos() - self.__click_pos)
self.__editor.moveTrack(pos.y())
evt.accept()
def mouseReleaseEvent(self, evt: QtGui.QMouseEvent) -> None:
if evt.button() == Qt.LeftButton and self.__click_pos is not None:
self.__click_pos = None
self.__editor.endTrackMove()
self.__editor.setAutoScroll(0)
self.setCursor(Qt.OpenHandCursor)
evt.accept()
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
painter = QtGui.QPainter(self)
try:
w = self.width()
h = self.height()
if self.isCurrent():
c_tl = QtGui.QColor(255, 255, 255)
c_br = QtGui.QColor(160, 160, 255)
c_body = QtGui.QColor(220, 220, 255)
else:
c_tl = QtGui.QColor(255, 255, 255)
c_br = QtGui.QColor(160, 160, 160)
c_body = QtGui.QColor(220, 220, 220)
painter.fillRect(0, 0, w, 1, c_tl)
painter.fillRect(0, 1, 1, h - 1, c_tl)
painter.fillRect(1, h - 1, w - 1, 1, c_br)
painter.fillRect(w - 1, 1, 1, h - 2, c_br)
painter.fillRect(1, 1, w - 2, 1, c_tl)
painter.fillRect(1, 2, 1, h - 3, c_tl)
painter.fillRect(2, h - 2, w - 3, 1, c_br)
painter.fillRect(w - 2, 2, 1, h - 4, c_br)
painter.fillRect(2, 2, w - 4, h - 4, c_body)
mx = w // 2
my = h // 2
for i in (0, -1, 1, -2, 2):
hy1 = my - 3 + 8 * i
hy2 = my + 3 + 8 * i
if my - 8 * abs(i) >= 13:
painter.fillRect(mx - 2, hy1, 1, hy2 - hy1, c_br)
painter.fillRect(mx - 1, hy1, 1, hy2 - hy1 - 1, c_br)
painter.fillRect(mx - 1, hy2 - 1, 1, 1, c_tl)
painter.fillRect(mx, hy1, 1, 1, c_br)
painter.fillRect(mx, hy1 + 1, 1, hy2 - hy1 - 1, c_tl)
painter.fillRect(mx + 1, hy1, 1, hy2 - hy1, c_tl)
finally:
painter.end()
class Oscilloscope(slots.SlotContainer, QtWidgets.QWidget):
timeScale, setTimeScale, timeScaleChanged = slots.slot(int,
'timeScale',
default=-2)
yScale, setYScale, yScaleChanged = slots.slot(int, 'yScale', default=0)
yOffset, setYOffset, yOffsetChanged = slots.slot(float,
'yOffset',
default=0.0)
paused, setPaused, pausedChanged = slots.slot(bool,
'paused',
default=False)
holdTime, setHoldTime, holdTimeChanged = slots.slot(int,
'holdTime',
default=0)
def __init__(self, **kwargs: Any) -> None:
super().__init__(**kwargs)
self.setMinimumSize(20, 20)
self.__signal = [] # type: List[SignalPoint]
self.__state = State.WAIT_FOR_TRIGGER
self.__insert_pos = 0
self.__screen_pos = 0
self.__density = 3
self.__remainder = 0.0
self.__prev_sample = 0.0
self.__hold_begin = 0.0
self.__trigger_begin = 0.0
self.__trigger_found = False
self.__timePerPixel = 1.0
self.__timePerSample = 1.0 / 44100
self.__bg_color = QtGui.QColor(0, 0, 0)
self.__border_color = QtGui.QColor(100, 200, 100)
self.__grid_color = QtGui.QColor(40, 60, 40)
self.__center_color = QtGui.QColor(60, 100, 60)
self.__plot_pen = QtGui.QPen(QtGui.QColor(255, 255, 255))
self.__plot_pen.setWidth(1)
self.__plot_fill_color = QtGui.QColor(200, 255, 200, 100)
self.__label_color = QtGui.QColor(100, 200, 100)
self.__label_font = QtGui.QFont(self.font())
self.__label_font.setPointSizeF(0.8 * self.__label_font.pointSizeF())
self.__label_font_metrics = QtGui.QFontMetrics(self.__label_font)
self.__warning_pen = QtGui.QPen(QtGui.QColor(255, 255, 255))
self.__warning_font = QtGui.QFont(self.font())
self.__warning_font.setPointSizeF(0.9 *
self.__warning_font.pointSizeF())
self.__warning_font.setBold(True)
self.__warning_font_metrics = QtGui.QFontMetrics(self.__warning_font)
self.__warning_pixmap = QtGui.QIcon(
os.path.join(constants.DATA_DIR, 'icons', 'warning.svg')).pixmap(
4 + self.__warning_font_metrics.capHeight(),
4 + self.__warning_font_metrics.capHeight())
self.__show_minor_grid = False
self.__show_major_grid = False
self.__show_y_labels = False
self.__show_x_labels = False
self.__time_step_size = 100
self.__plot_rect = None # type: QtCore.QRect
self.__bg_cache = None # type: QtGui.QPixmap
self.__update_timer = QtCore.QTimer(self)
self.__update_timer.timeout.connect(self.update)
self.__update_timer.setInterval(1000 // 20)
self.timeScaleChanged.connect(self.__timeScaleChanged)
self.timeScaleChanged.connect(lambda _: self.__invalidateBGCache())
self.yScaleChanged.connect(lambda _: self.__invalidateBGCache())
self.yOffsetChanged.connect(lambda _: self.__invalidateBGCache())
def __setState(self, state: State) -> None:
if state == self.__state:
return
if state == State.RECORDING:
self.__insert_pos = 0
self.__screen_pos = 0
self.__remainder = 0.0
elif state == State.HOLD:
self.__hold_begin = time.time()
elif state == State.WAIT_FOR_TRIGGER:
self.__trigger_begin = time.time()
self.__state = state
def __timeScaleChanged(self, value: int) -> None:
if self.__plot_rect is None:
return
self.__timePerPixel = self.__density * self.absTimeScale(
) / self.__time_step_size
if not self.paused():
self.__setState(State.WAIT_FOR_TRIGGER)
def absTimeScale(self) -> float:
time_scale = self.timeScale()
return [1, 2, 5][time_scale % 3] * 10.0**(time_scale // 3)
def absYScale(self) -> float:
y_scale = self.yScale()
return [1, 2, 5][y_scale % 3] * 10.0**(y_scale // 3)
def absHoldTime(self) -> float:
hold_time = self.holdTime()
return [1, 2, 5][hold_time % 3] * 10.0**(hold_time // 3)
@classmethod
def formatTimeScale(cls, time_scale: int) -> str:
mul = [1, 2, 5][time_scale % 3]
time_scale //= 3
if time_scale <= -4:
return '%dµs' % (mul * 10**(time_scale + 6))
elif time_scale <= -1:
return '%dms' % (mul * 10**(time_scale + 3))
else:
return '%ds' % (mul * 10**time_scale)
@classmethod
def formatHoldTime(cls, hold_time: int) -> str:
mul = [1, 2, 5][hold_time % 3]
hold_time //= 3
if hold_time <= -4:
return '%dµs' % (mul * 10**(hold_time + 6))
elif hold_time <= -1:
return '%dms' % (mul * 10**(hold_time + 3))
else:
return '%ds' % (mul * 10**hold_time)
@classmethod
def formatYScale(cls, y_scale: int) -> str:
return '%g' % ([1, 2, 5][y_scale % 3] * 10.0**(y_scale // 3))
def addValues(self, samples_per_value: int,
values: Iterable[float]) -> None:
if self.__plot_rect is None:
return
trigger_value = -self.yOffset() * self.absYScale()
for value in values:
for _ in range(samples_per_value):
if self.__state == State.HOLD and not self.paused():
if time.time() - self.__hold_begin > self.absHoldTime():
self.__setState(State.WAIT_FOR_TRIGGER)
if self.__state == State.WAIT_FOR_TRIGGER:
if self.__prev_sample < trigger_value and value >= trigger_value:
self.__trigger_found = True
self.__setState(State.RECORDING)
elif time.time(
) - self.__trigger_begin > 10 * self.absTimeScale():
self.__setState(State.RECORDING)
self.__trigger_found = False
self.__prev_sample = value
if self.__state != State.RECORDING:
continue
if self.__timePerPixel >= self.__timePerSample:
self.__remainder += self.__timePerSample
if self.__remainder >= 0.0:
self.__remainder -= self.__timePerPixel
pnt = SignalPoint(self.__screen_pos)
pnt.add_sample(value)
self.__signal.insert(self.__insert_pos, pnt)
self.__insert_pos += 1
while (self.__insert_pos < len(self.__signal)
and (self.__signal[self.__insert_pos].screen_pos
<= self.__screen_pos)):
del self.__signal[self.__insert_pos]
self.__screen_pos += self.__density
else:
pnt = self.__signal[self.__insert_pos - 1]
pnt.add_sample(value)
else:
pnt = SignalPoint(self.__screen_pos)
pnt.add_sample(value)
self.__signal.insert(self.__insert_pos, pnt)
self.__insert_pos += 1
while (self.__insert_pos < len(self.__signal)
and self.__signal[self.__insert_pos].screen_pos <=
self.__screen_pos):
del self.__signal[self.__insert_pos]
self.__remainder += self.__timePerSample
while self.__remainder >= 0.0:
self.__remainder -= self.__timePerPixel
self.__screen_pos += self.__density
if self.__screen_pos >= self.__plot_rect.width() + 10:
self.__setState(State.HOLD)
del self.__signal[self.__insert_pos:]
def step(self) -> None:
if self.paused() and self.__state == State.HOLD:
self.__setState(State.WAIT_FOR_TRIGGER)
def sizeHint(self) -> QtCore.QSize:
return QtCore.QSize(100, 100)
def minimumSizeHint(self) -> QtCore.QSize:
return QtCore.QSize(60, 60)
def resizeEvent(self, evt: QtGui.QResizeEvent) -> None:
if evt.size().width() > 20 and evt.size().height() > 20:
self.__show_major_grid = True
else:
self.__show_major_grid = False
if evt.size().width() > 100 and evt.size().height() > 100:
self.__show_minor_grid = True
else:
self.__show_minor_grid = False
y_label_width = self.__label_font_metrics.boundingRect(
'500000').width() + 3
if evt.size().width() >= y_label_width + 100 and evt.size().height(
) >= 60:
self.__show_y_labels = True
else:
self.__show_y_labels = False
x_label_height = self.__label_font_metrics.capHeight() + 2
if evt.size().width() >= 100 and evt.size().height(
) >= x_label_height + 100:
self.__show_x_labels = True
else:
self.__show_x_labels = False
if evt.size().width() >= 60 and evt.size().height() >= 60:
margin = 2
else:
margin = 0
border_left = margin
border_right = margin
border_top = margin
border_bottom = margin
if self.__show_y_labels:
border_left += y_label_width
if self.__show_x_labels:
border_bottom += x_label_height
if (evt.size().width() >= border_left + border_right + 10
and evt.size().height() >= border_top + border_bottom + 10):
self.__plot_rect = QtCore.QRect(
border_left, border_right,
evt.size().width() - border_left - border_right,
evt.size().height() - border_top - border_bottom)
self.__time_step_size = self.__plot_rect.height() // 2
else:
self.__plot_rect = None
self.__invalidateBGCache()
self.__timeScaleChanged(self.timeScale())
super().resizeEvent(evt)
def showEvent(self, evt: QtGui.QShowEvent) -> None:
self.__update_timer.start()
super().showEvent(evt)
def hideEvent(self, evt: QtGui.QHideEvent) -> None:
self.__update_timer.stop()
self.__invalidateBGCache()
super().hideEvent(evt)
def __invalidateBGCache(self) -> None:
self.__bg_cache = None
def __renderBG(self) -> None:
w = self.__plot_rect.width()
h = self.__plot_rect.height()
self.__bg_cache = QtGui.QPixmap(self.size())
painter = QtGui.QPainter(self.__bg_cache)
try:
painter.fillRect(self.__bg_cache.rect(), self.__bg_color)
painter.save()
painter.translate(self.__plot_rect.topLeft())
if self.__show_minor_grid:
for g in (-4, -3, -2, -1, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13,
14):
tick_pos = int((g / 10 - 0.5 * self.yOffset()) * (h - 1))
if not 0 <= tick_pos < h:
continue
painter.fillRect(0, tick_pos, w, 1, self.__grid_color)
x = 0
while x < w:
for g in (1, 2, 3, 4):
painter.fillRect(
x + int(g * self.__time_step_size / 5), 0, 1, h,
self.__grid_color)
x += self.__time_step_size
if self.__show_major_grid:
for tick in (-2.0, -1.0, 0.0, 1.0, 2.0):
tick_pos = int(0.5 * (1.0 - tick - self.yOffset()) *
(h - 1))
if not 0 <= tick_pos < h:
continue
painter.fillRect(0, tick_pos, w, 1, self.__center_color)
x = self.__time_step_size
while x < w:
painter.fillRect(x, 0, 1, h, self.__center_color)
x += self.__time_step_size
painter.fillRect(0, 0, w, 1, self.__border_color)
painter.fillRect(0, h - 1, w, 1, self.__border_color)
painter.fillRect(0, 0, 1, h, self.__border_color)
painter.fillRect(w - 1, 0, 1, h, self.__border_color)
painter.restore()
painter.setFont(self.__label_font)
painter.setPen(self.__label_color)
if self.__show_x_labels and self.__time_step_size <= w:
t1 = self.formatTimeScale(self.timeScale())
t1r = self.__label_font_metrics.boundingRect(t1)
painter.drawText(
min(
self.__plot_rect.left() + self.__time_step_size -
t1r.width() // 2,
self.__plot_rect.right() - t1r.width()),
self.__plot_rect.bottom() +
self.__label_font_metrics.capHeight() + 2, t1)
if self.__show_y_labels:
y_min = self.__plot_rect.top(
) + self.__label_font_metrics.capHeight()
y_max = self.__plot_rect.bottom()
for tick in (-2.0, -1.0, 0.0, 1.0, 2.0):
tick_pos = int(0.5 * (1.0 - tick - self.yOffset()) *
(h - 1))
if not 0 <= tick_pos < h:
continue
painter.fillRect(self.__plot_rect.left() - 3,
self.__plot_rect.top() + tick_pos, 3, 1,
self.__border_color)
y1 = '%g' % (tick * self.absYScale())
y1r = self.__label_font_metrics.boundingRect(y1)
label_pos = (self.__plot_rect.top() + tick_pos +
self.__label_font_metrics.capHeight() // 2)
label_pos = max(y_min, min(y_max, label_pos))
painter.drawText(self.__plot_rect.left() - y1r.width() - 4,
label_pos, y1)
finally:
painter.end()
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
painter = QtGui.QPainter(self)
try:
if self.__bg_cache is None:
self.__renderBG()
painter.drawPixmap(0, 0, self.__bg_cache)
w = self.__plot_rect.width()
h = self.__plot_rect.height()
painter.setClipRect(self.__plot_rect)
painter.translate(self.__plot_rect.topLeft())
y_scale = self.absYScale()
y_offset = self.yOffset()
min_path = QtGui.QPolygon()
max_path = QtGui.QPolygon()
for pnt in self.__signal:
if pnt.screen_pos >= w:
break
x = pnt.screen_pos
min_value = pnt.min / y_scale + y_offset
min_y = int((h - 1) * (1.0 - min_value) / 2.0)
min_path.append(QtCore.QPoint(x, min_y))
max_value = pnt.max / y_scale + y_offset
max_y = int((h - 1) * (1.0 - max_value) / 2.0)
max_path.append(QtCore.QPoint(x, max_y))
if min_y > max_y + 1:
painter.fillRect(x, max_y + 1, self.__density,
min_y - max_y - 1, self.__plot_fill_color)
painter.setPen(self.__plot_pen)
painter.drawPolyline(min_path)
painter.drawPolyline(max_path)
if not self.__trigger_found and h > 5 * self.__warning_font_metrics.capHeight(
):
x = (w - self.__warning_font_metrics.boundingRect(
"No Trigger").width() - self.__warning_pixmap.width() - 8)
if x > 0:
painter.drawPixmap(x, 3, self.__warning_pixmap)
x += self.__warning_pixmap.width() + 3
painter.setPen(self.__warning_pen)
painter.setFont(self.__warning_font)
painter.drawText(
x, 5 + self.__warning_font_metrics.capHeight(),
"No Trigger")
finally:
painter.end()
class ContinuousTimeMixin(ScaledTimeMixin, slots.SlotContainer):
additionalXOffset, setAdditionalXOffset, additionalXOffsetChanged = slots.slot(
int, 'additionalXOffset', default=0)
snapToGrid, setSnapToGrid, snapToGridChanged = slots.slot(bool, 'snapToGrid', default=True)
def __init__(self, **kwargs: Any) -> None:
super().__init__(**kwargs)
self.__grid_step = audioproc.MusicalDuration(1, 1)
self.scaleXChanged.connect(self.__scaleXChanged)
self.__scaleXChanged(self.scaleX())
def __scaleXChanged(self, scale_x: fractions.Fraction) -> None:
self.__grid_step = audioproc.MusicalDuration(1, 64)
min_dist = 96
while int(self.__grid_step * scale_x) <= min_dist:
self.__grid_step *= 2
if int(self.__grid_step) > 1:
min_dist = 36
def durationPerPixel(self) -> audioproc.MusicalDuration:
return audioproc.MusicalDuration(1 / self.scaleX())
def timeToX(self, time: audioproc.MusicalTime) -> int:
return self.leftMargin() + self.additionalXOffset() + int(self.scaleX() * time.fraction)
def xToTime(self, x: int) -> audioproc.MusicalTime:
x -= self.leftMargin() + self.additionalXOffset()
if x <= 0:
return audioproc.MusicalTime(0, 1)
return audioproc.MusicalTime(x / self.scaleX())
def gridStep(self) -> audioproc.MusicalDuration:
return self.__grid_step
def shouldSnap(self, evt: QtGui.QMouseEvent) -> bool:
return self.snapToGrid() and not evt.modifiers() & Qt.ShiftModifier
def snapTime(self, time: audioproc.MusicalTime) -> audioproc.MusicalTime:
grid_time = (
audioproc.MusicalTime(0, 1)
+ self.gridStep() * int(round(float(time / self.gridStep()))))
time_x = int(time * self.scaleX())
grid_x = int(grid_time * self.scaleX())
if abs(time_x - grid_x) <= 10:
return grid_time
return time
def renderTimeGrid(
self, painter: QtGui.QPainter, rect: QtCore.QRect, *, show_numbers: bool = False
) -> None:
grid_step = self.gridStep()
tick_num = int(self.xToTime(rect.x()) / grid_step)
tick_time = (grid_step * tick_num).as_time()
while tick_time < self.projectEndTime():
x = self.timeToX(tick_time)
if x > rect.right():
break
if tick_num == 0:
painter.fillRect(x, rect.y(), 2, rect.height(), Qt.black)
else:
if tick_time % audioproc.MusicalTime(1, 1) == audioproc.MusicalTime(0, 1):
c = QtGui.QColor(0, 0, 0)
elif tick_time % audioproc.MusicalTime(1, 4) == audioproc.MusicalTime(0, 1):
c = QtGui.QColor(160, 160, 160)
elif tick_time % audioproc.MusicalTime(1, 8) == audioproc.MusicalTime(0, 1):
c = QtGui.QColor(185, 185, 185)
elif tick_time % audioproc.MusicalTime(1, 16) == audioproc.MusicalTime(0, 1):
c = QtGui.QColor(210, 210, 210)
elif tick_time % audioproc.MusicalTime(1, 32) == audioproc.MusicalTime(0, 1):
c = QtGui.QColor(225, 225, 225)
else:
c = QtGui.QColor(240, 240, 240)
painter.fillRect(x, rect.y(), 1, rect.height(), c)
if (show_numbers
and tick_time % audioproc.MusicalTime(1, 1) == audioproc.MusicalTime(0, 1)):
beat_num = int(tick_time / audioproc.MusicalTime(1, 4))
painter.setPen(Qt.black)
painter.drawText(x + 5, 12, '%d' % (beat_num + 1))
tick_time += grid_step
tick_num += 1
x = self.timeToX(self.projectEndTime())
painter.fillRect(x, rect.y(), 2, rect.height(), Qt.black)
class MeasureEditor(core.AutoCleanupMixin, slots.SlotContainer,
BaseMeasureEditor):
selected, setSelected, selectedChanged = slots.slot(bool,
'selected',
default=False)
PLAYBACK_POS = 'playback_pos'
layers = None # type: List[str]
def __init__(self, measure_reference: music.MeasureReference,
**kwargs: Any) -> None:
super().__init__(**kwargs)
self.__paint_caches = {} # type: Dict[str, QtGui.QPixmap]
self.__cached_size = QtCore.QSize()
self.__measure_reference = measure_reference
self.__measure = self.__measure_reference.measure
self.__measure_listener = self.__measure_reference.measure_changed.add(
self.__measureChanged)
self.__hovered = False
self._measure_listeners = core.ListenerList()
self.add_cleanup_function(self._measure_listeners.cleanup)
if self.__measure is not None:
self.addMeasureListeners()
self.selectedChanged.connect(
lambda _: self.rectChanged.emit(self.viewRect()))
self.track_editor.hoveredMeasureChanged.connect(
self.__onHoveredMeasureChanged)
def cleanup(self) -> None:
self.track_editor.hoveredMeasureChanged.disconnect(
self.__onHoveredMeasureChanged)
super().cleanup()
@property
def duration(self) -> audioproc.MusicalDuration:
return self.__measure.duration
@property
def measure_reference(self) -> music.MeasureReference:
return self.__measure_reference
@property
def measure(self) -> music.Measure:
return self.__measure
@property
def is_first(self) -> bool:
return (self.__measure_reference is not None
and self.__measure_reference.index == 0)
def addMeasureListeners(self) -> None:
raise NotImplementedError
def __measureChanged(
self, change: music.PropertyValueChange[music.Measure]) -> None:
self._measure_listeners.cleanup()
self.purgePaintCaches()
self.__measure = self.__measure_reference.measure
self.addMeasureListeners()
self.rectChanged.emit(self.viewRect())
def buildContextMenu(self, menu: QtWidgets.QMenu,
pos: QtCore.QPoint) -> None:
super().buildContextMenu(menu, pos)
insert_measure_action = QtWidgets.QAction("Insert measure", menu)
insert_measure_action.setStatusTip(
"Insert an empty measure at this point.")
insert_measure_action.triggered.connect(self.onInsertMeasure)
menu.addAction(insert_measure_action)
remove_measure_action = QtWidgets.QAction("Remove measure", menu)
remove_measure_action.setStatusTip("Remove this measure.")
remove_measure_action.triggered.connect(self.onRemoveMeasure)
menu.addAction(remove_measure_action)
def onInsertMeasure(self) -> None:
with self.project.apply_mutations('%s: Insert measure' %
self.track.name):
self.track.insert_measure(self.measure_reference.index)
def onRemoveMeasure(self) -> None:
with self.project.apply_mutations('%s: Remove measure' %
self.track.name):
self.track.remove_measure(self.measure_reference.index)
def __onHoveredMeasureChanged(self, measure_id: int) -> None:
hovered = (measure_id == self.measure_reference.measure.id)
if hovered != self.__hovered:
self.__hovered = hovered
self.rectChanged.emit(self.viewRect())
def purgePaintCaches(self) -> None:
self.__paint_caches.clear()
def invalidatePaintCache(self, *layers: str) -> None:
for layer in layers:
self.__paint_caches.pop(layer, None)
self.rectChanged.emit(self.viewRect())
def paintPlaybackPos(self, painter: QtGui.QPainter) -> None:
raise NotImplementedError
def paintLayer(self, layer: str, painter: QtGui.QPainter) -> None:
raise NotImplementedError
def paint(self, painter: QtGui.QPainter, paint_rect: QtCore.QRect) -> None:
if self.__cached_size != self.size():
self.__paint_caches.clear()
for layer in self.layers:
if layer == self.PLAYBACK_POS:
continue
if layer not in self.__paint_caches:
pixmap = QtGui.QPixmap(self.size())
pixmap.fill(Qt.transparent)
layer_painter = QtGui.QPainter(pixmap)
try:
self.paintLayer(layer, layer_painter)
finally:
layer_painter.end()
self.__paint_caches[layer] = pixmap
self.__cached_size = self.size()
if self.selected():
painter.fillRect(paint_rect, QtGui.QColor(255, 200, 200))
elif self.__hovered:
painter.fillRect(paint_rect, QtGui.QColor(220, 220, 255))
for layer in self.layers:
if layer == self.PLAYBACK_POS:
if self.playbackPos() is not None:
self.paintPlaybackPos(painter)
else:
painter.drawPixmap(0, 0, self.__paint_caches[layer])
class VUMeter(slots.SlotContainer, QtWidgets.QWidget):
orientation, setOrientation, orientationChanged = slots.slot(
Qt.Orientation, 'orientation', default=Qt.Horizontal)
minimum, setMinimum, minimumChanged = slots.slot(float,
'minimum',
default=-52.0)
maximum, setMaximum, maximumChanged = slots.slot(float,
'maximum',
default=22.0)
leftValue, setLeftValue, leftValueChanged = slots.slot(float,
'leftValue',
default=-50.0)
leftPeak, setLeftPeak, leftPeakChanged = slots.slot(float,
'leftPeak',
default=-50.0)
rightValue, setRightValue, rightValueChanged = slots.slot(float,
'rightValue',
default=-50.0)
rightPeak, setRightPeak, rightPeakChanged = slots.slot(float,
'rightPeak',
default=-50.0)
def __init__(self, parent: Optional[QtWidgets.QWidget]) -> None:
super().__init__(parent=parent)
self.minimumChanged.connect(lambda _: self.update())
self.maximumChanged.connect(lambda _: self.update())
self.leftValueChanged.connect(lambda _: self.update())
self.leftPeakChanged.connect(lambda _: self.update())
self.rightValueChanged.connect(lambda _: self.update())
self.rightPeakChanged.connect(lambda _: self.update())
self.orientationChanged.connect(lambda _: self.update())
def minimumSizeHint(self) -> QtCore.QSize:
return QtCore.QSize(20, 20)
def normalizeValue(self, value: float) -> float:
value = max(self.minimum(), min(value, self.maximum()))
value = (value - self.minimum()) / (self.maximum() - self.minimum())
return value
def __drawHBar(self, painter: QtGui.QPainter, rect: QtCore.QRect,
value: float, peak: float, ticks: List[Tuple[float,
str]]) -> None:
value = self.normalizeValue(value)
peak = self.normalizeValue(peak)
x, y = rect.left(), rect.top()
w, h = rect.width(), rect.height()
if value > 0.0:
value_x = int(w * value)
warn_x = int(w * self.normalizeValue(-9.0))
clip_x = int(w * self.normalizeValue(0.0))
painter.fillRect(QtCore.QRect(x, y, min(value_x, warn_x), h),
Qt.green)
if value_x > warn_x:
painter.fillRect(
QtCore.QRect(x + warn_x, y,
min(value_x, clip_x) - warn_x, h), Qt.yellow)
if value_x > clip_x:
painter.fillRect(
QtCore.QRect(x + clip_x, y, value_x - clip_x, h), Qt.red)
if peak > 0.0:
peak_x = int((w - 1) * peak)
painter.fillRect(QtCore.QRect(x + peak_x - 1, y, 2, h), Qt.red)
tick_h = int(h / 5)
for tick, _ in ticks:
tick_x = int(w * self.normalizeValue(tick))
painter.fillRect(QtCore.QRect(x + tick_x, y, 1, tick_h), Qt.white)
painter.fillRect(
QtCore.QRect(x + tick_x, y + h - tick_h, 1, tick_h), Qt.white)
def __drawVBar(self, painter: QtGui.QPainter, rect: QtCore.QRect,
value: float, peak: float, ticks: List[Tuple[float,
str]]) -> None:
value = self.normalizeValue(value)
peak = self.normalizeValue(peak)
x, y = rect.left(), rect.top()
w, h = rect.width(), rect.height()
if value > 0.0:
value_y = int(h * value)
warn_y = int(h * self.normalizeValue(-9.0))
clip_y = int(h * self.normalizeValue(0.0))
painter.fillRect(
QtCore.QRect(x, y + h - min(value_y, warn_y), w,
min(value_y, warn_y)), Qt.green)
if value_y > warn_y:
painter.fillRect(
QtCore.QRect(x, y + h - min(value_y, clip_y), w,
min(value_y, clip_y) - warn_y), Qt.yellow)
if value_y > clip_y:
painter.fillRect(
QtCore.QRect(x, y + h - value_y, w, value_y - clip_y),
Qt.red)
if peak > 0.0:
peak_y = int(int((h - 1) * peak))
painter.fillRect(QtCore.QRect(x, y + h - peak_y - 1, w, 2), Qt.red)
tick_w = int(w / 5)
for tick, _ in ticks:
tick_y = int(h * self.normalizeValue(tick))
painter.fillRect(QtCore.QRect(x, y + tick_y, tick_w, 1), Qt.white)
painter.fillRect(
QtCore.QRect(x + w - tick_w, y + tick_y, tick_w, 1), Qt.white)
def paintEvent(self, evt: QtGui.QPaintEvent) -> None:
w, h = self.width(), self.height()
painter = QtGui.QPainter(self)
try:
painter.fillRect(0, 0, w, h, Qt.black)
font = QtGui.QFont("Arial")
font.setPixelSize(12)
painter.setFont(font)
fm = QtGui.QFontMetrics(font)
ticks = []
tick = math.modf(self.minimum() / 10.0)[1] * 10.0
while tick <= self.maximum():
label = '%+.0f' % tick
if label == '+0':
label = '0dB'
ticks.append((tick, label))
tick += 10.0
if self.orientation() == Qt.Horizontal:
if h > 60:
label_h = max(14, min(h / 4, 30))
bar_h = int((h - 12 - label_h) / 2)
else:
label_h = 0
bar_h = int((h - 6) / 2)
label_top = int((h - 14) / 2)
label_bottom = label_top + 14
for tick, label in ticks:
tick_x = int((w - 4) * self.normalizeValue(tick))
painter.fillRect(2 + tick_x, 2, 1, label_top - 2,
QtGui.QColor(60, 60, 60))
painter.fillRect(2 + tick_x, 2 + label_bottom, 1,
h - label_bottom - 4,
QtGui.QColor(60, 60, 60))
if label_h > 0:
pen = QtGui.QPen()
pen.setColor(Qt.white)
painter.setPen(pen)
r = fm.boundingRect(label)
painter.drawText(
QtCore.QPoint(
int(tick_x - r.width() / 2),
int((h - r.height()) / 2 +
1.5 * fm.capHeight())), label)
self.__drawHBar(painter, QtCore.QRect(2, 2, w - 4, bar_h),
self.leftValue(), self.leftPeak(), ticks)
self.__drawHBar(painter,
QtCore.QRect(2, h - bar_h - 2, w - 4, bar_h),
self.rightValue(), self.rightPeak(), ticks)
else:
if w > 80:
label_w = max(30, min(w / 3, 50))
bar_w = int((w - 12 - label_w) / 2)
else:
label_w = 0
bar_w = int((w - 6) / 2)
label_left = int((w - 30) / 2)
label_right = label_left + 30
for tick, label in ticks:
tick_y = h - 2 - int((h - 4) * self.normalizeValue(tick))
painter.fillRect(2, tick_y, label_left - 2, 1,
QtGui.QColor(60, 60, 60))
painter.fillRect(2 + label_right, tick_y,
w - label_right - 4, 1,
QtGui.QColor(60, 60, 60))
if label_w > 0:
pen = QtGui.QPen()
pen.setColor(Qt.white)
painter.setPen(pen)
fm = QtGui.QFontMetrics(font)
r = fm.boundingRect(label)
painter.drawText(
QtCore.QPoint(int((w - r.width()) / 2),
int(tick_y + 0.5 * fm.capHeight())),
label)
self.__drawVBar(painter, QtCore.QRect(2, 2, bar_w, h - 4),
self.leftValue(), self.leftPeak(), ticks)
self.__drawVBar(painter,
QtCore.QRect(w - bar_w - 2, 2, bar_w, h - 4),
self.rightValue(), self.rightPeak(), ticks)
finally:
painter.end()