""" ui/windows/signals_window.py SIGNALS window — toolbar section 3. Tabs: Pipeline — per-channel filter stack (filters, calibration, scale/offset) Derived — create virtual channels from physical ones Channels — visibility & color management for all channels CALIBRATION: A dedicated calibration section inside Pipeline lets the operator enter known input→output pairs and fits a linear (or polynomial) cal curve, which is applied as a ScaleOffset filter. DERIVED includes: - displacement from pot voltage (calibrated) - velocity from displacement (backward difference) - acceleration from velocity - power (V*I) - expression (x[0]*2 + 1) - custom Python function/script """ from __future__ import annotations import math from typing import List, Optional, Tuple from PyQt6.QtWidgets import ( QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QScrollArea, QFrame, QTabWidget, QComboBox, QLineEdit, QDoubleSpinBox, QSpinBox, QCheckBox, QTextEdit, QGroupBox, QToolButton, QSizePolicy, QTableWidget, QTableWidgetItem, QHeaderView, QAbstractItemView, QFormLayout, QMessageBox, ) from PyQt6.QtCore import Qt, pyqtSignal from PyQt6.QtGui import QColor, QFont, QCloseEvent from devices.device_registry import DeviceRegistry from core.signal_processor import ( SignalProcessor, ChannelPipeline, DerivedChannel, FilterBase, MovingAverageFilter, MedianFilter, LowPassFilter, HighPassFilter, ScaleOffsetFilter, DerivativeFilter, IntegralFilter, FILTER_CLASSES, ) _DERIVED_COLORS = [ "#f72585","#7209b7","#4361ee","#4cc9f0", "#f77f00","#d62828","#588157","#e9c46a", ] def _channel_combo(registry: DeviceRegistry, processor: Optional[SignalProcessor] = None, include_derived: bool = False) -> QComboBox: cb = QComboBox(); cb.setObjectName("channelPickerCb") for dev in registry.all_instances(): for ch in dev.info.channels: cb.addItem(f"{dev.info.device_id} / {ch.channel_id} ({ch.name})", userData=(dev.info.device_id, ch.channel_id)) if include_derived and processor: for dc in processor.get_derived(): cb.addItem(f"[derived] {dc.channel_id} ({dc.name})", userData=("derived", dc.channel_id)) return cb # ══════════════════════════════════════════════════════════════════════════════ # Filter row # ══════════════════════════════════════════════════════════════════════════════ _PARAM_SPECS = { "moving_average": [("window", "int", 10, 1, 5000)], "median": [("window", "int", 5, 1, 500)], "low_pass": [("alpha", "float", 0.1, 0.001, 1.0)], "high_pass": [("alpha", "float", 0.9, 0.001, 1.0)], "scale_offset": [("scale", "float", 1.0, -1e6, 1e6), ("offset", "float", 0.0, -1e9, 1e9)], "derivative": [], "integral": [], } class FilterRow(QFrame): removed = pyqtSignal(object) changed = pyqtSignal() def __init__(self, filt: FilterBase): super().__init__() self.filt = filt self.setObjectName("traceRow") self._build() def _build(self): lay = QHBoxLayout(self); lay.setContentsMargins(6,4,6,4); lay.setSpacing(8) lbl = QLabel(self.filt.name.replace("_"," ").title()) lbl.setObjectName("traceSource"); lbl.setMinimumWidth(120) lay.addWidget(lbl) for pname, ptype, default, lo, hi in _PARAM_SPECS.get(self.filt.name, []): lay.addWidget(QLabel(f"{pname}:").also(lambda w: w.setObjectName("pwmLabel"))) if ptype == "int": w = QSpinBox(); w.setRange(int(lo), int(hi)) w.setValue(int(self.filt.params.get(pname, default))) w.setFixedWidth(70); w.setObjectName("traceWidthSpin") w.valueChanged.connect(lambda v, p=pname: self._upd(p, v)) else: w = QDoubleSpinBox(); w.setRange(lo, hi); w.setDecimals(4) w.setValue(float(self.filt.params.get(pname, default))) w.setFixedWidth(88); w.setObjectName("traceWidthSpin") w.valueChanged.connect(lambda v, p=pname: self._upd(p, v)) lay.addWidget(w) lay.addStretch() rm = QToolButton(); rm.setText("✕"); rm.setObjectName("traceRemoveBtn") rm.setFixedSize(22, 22); rm.clicked.connect(lambda: self.removed.emit(self)) lay.addWidget(rm) def _upd(self, name, value): self.filt.params[name] = value cls = FILTER_CLASSES.get(self.filt.name) if cls: nf = cls(**self.filt.params); self.filt.__dict__.update(nf.__dict__) self.changed.emit() # monkey-patch QLabel.also so we can set objectName inline above from PyQt6.QtWidgets import QLabel as _QLabel def _also(self, fn): fn(self); return self _QLabel.also = _also # ══════════════════════════════════════════════════════════════════════════════ # Calibration widget # ══════════════════════════════════════════════════════════════════════════════ class CalibrationWidget(QGroupBox): """ Linear calibration: enter N (raw, engineering) point pairs, fit y = scale*x + offset, apply as ScaleOffsetFilter. """ cal_applied = pyqtSignal(float, float) # scale, offset def __init__(self, parent=None): super().__init__("Calibration", parent) self._points: List[Tuple[float,float]] = [] self._build() def _build(self): lay = QVBoxLayout(self); lay.setSpacing(4) # Table of raw→engineering pairs self._tbl = QTableWidget(0, 2) self._tbl.setHorizontalHeaderLabels(["Raw (sensor)", "Engineering"]) self._tbl.horizontalHeader().setSectionResizeMode(QHeaderView.ResizeMode.Stretch) self._tbl.setMaximumHeight(130) self._tbl.setObjectName("channelTable") lay.addWidget(self._tbl) btn_row = QHBoxLayout() add_pt = QPushButton("＋ Point"); add_pt.setObjectName("addTraceBtn") add_pt.clicked.connect(self._add_row) rm_pt = QPushButton("✕ Remove"); rm_pt.setObjectName("configButton") rm_pt.clicked.connect(self._rm_row) btn_row.addWidget(add_pt); btn_row.addWidget(rm_pt); btn_row.addStretch() lay.addLayout(btn_row) # Result self._result_lbl = QLabel("") self._result_lbl.setObjectName("traceSource"); lay.addWidget(self._result_lbl) fit_btn = QPushButton("Fit & Apply"); fit_btn.setObjectName("applyButton") fit_btn.clicked.connect(self._fit); lay.addWidget(fit_btn) def _add_row(self): r = self._tbl.rowCount(); self._tbl.insertRow(r) self._tbl.setItem(r, 0, QTableWidgetItem("0.0")) self._tbl.setItem(r, 1, QTableWidgetItem("0.0")) def _rm_row(self): rows = {i.row() for i in self._tbl.selectedItems()} for r in sorted(rows, reverse=True): self._tbl.removeRow(r) def _fit(self): pts = [] for r in range(self._tbl.rowCount()): try: x = float(self._tbl.item(r,0).text()) y = float(self._tbl.item(r,1).text()) pts.append((x,y)) except Exception: pass if len(pts) < 2: self._result_lbl.setText("⚠ Need ≥2 points"); return xs = [p[0] for p in pts]; ys = [p[1] for p in pts] n = len(pts) sx = sum(xs); sy = sum(ys) sxx = sum(x*x for x in xs); sxy = sum(x*y for x,y in pts) denom = n*sxx - sx*sx if abs(denom) < 1e-12: self._result_lbl.setText("⚠ Singular — all raw values identical"); return scale = (n*sxy - sx*sy) / denom offset = (sy - scale*sx) / n self._result_lbl.setText( f"y = {scale:.5g} × x + {offset:.5g} (R²≈{self._r2(xs,ys,scale,offset):.4f})" ) self._result_lbl.setStyleSheet("color:#22c55e;") self.cal_applied.emit(scale, offset) @staticmethod def _r2(xs, ys, scale, offset): y_mean = sum(ys)/len(ys) ss_tot = sum((y-y_mean)**2 for y in ys) ss_res = sum((y - (scale*x+offset))**2 for x,y in zip(xs,ys)) return 1 - ss_res/ss_tot if ss_tot else 1.0 # ══════════════════════════════════════════════════════════════════════════════ # Pipeline Tab — filter stack + calibration for one channel # ══════════════════════════════════════════════════════════════════════════════ class PipelineTab(QWidget): changed = pyqtSignal() def __init__(self, registry: DeviceRegistry, processor: SignalProcessor): super().__init__() self.registry = registry self.processor = processor self._rows: List[FilterRow] = [] self._cur_pipeline: Optional[ChannelPipeline] = None self._build() def _build(self): lay = QVBoxLayout(self); lay.setContentsMargins(0,0,0,0); lay.setSpacing(0) # Channel selector bar sel_bar = QWidget(); sel_bar.setObjectName("cfgGlobalBar") sb_lay = QHBoxLayout(sel_bar); sb_lay.setContentsMargins(10,7,10,7) sb_lay.addWidget(QLabel("Channel:")) self._ch_cb = _channel_combo(self.registry, self.processor, include_derived=True) self._ch_cb.currentIndexChanged.connect(self._load_pipeline) sb_lay.addWidget(self._ch_cb, 1) lay.addWidget(sel_bar) div = QFrame(); div.setFrameShape(QFrame.Shape.HLine) div.setObjectName("devWindowDivider"); lay.addWidget(div) scroll = QScrollArea(); scroll.setWidgetResizable(True) scroll.setObjectName("deviceScroll") scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff) self._cont = QWidget() self._inner = QVBoxLayout(self._cont) self._inner.setContentsMargins(10,10,10,10); self._inner.setSpacing(6) # Enable toggle self._en_chk = QCheckBox("Pipeline enabled"); self._en_chk.setChecked(True) self._en_chk.toggled.connect(self._on_enable) self._inner.addWidget(self._en_chk) # Filter rows area self._filter_area = QWidget() self._filter_lay = QVBoxLayout(self._filter_area) self._filter_lay.setContentsMargins(0,0,0,0); self._filter_lay.setSpacing(3) self._inner.addWidget(self._filter_area) # Add filter row add_bar = QHBoxLayout() self._filt_cb = QComboBox(); self._filt_cb.setObjectName("channelPickerCb") self._filt_cb.addItems([k.replace("_"," ").title() for k in FILTER_CLASSES]) add_bar.addWidget(self._filt_cb, 1) add_btn = QPushButton("＋ Add Filter"); add_btn.setObjectName("addTraceBtn") add_btn.clicked.connect(self._add_filter) add_bar.addWidget(add_btn) self._inner.addLayout(add_bar) # Calibration self._cal_widget = CalibrationWidget() self._cal_widget.cal_applied.connect(self._apply_calibration) self._inner.addWidget(self._cal_widget) self._inner.addStretch() scroll.setWidget(self._cont) lay.addWidget(scroll, 1) self._load_pipeline(0) def _load_pipeline(self, _=None): data = self._ch_cb.currentData() if not data: return dev_id, ch_id = data # Clear filter rows for r in self._rows: self._filter_lay.removeWidget(r); r.deleteLater() self._rows.clear() pipeline = self.processor.get_pipeline(dev_id, ch_id) if pipeline is None: pipeline = ChannelPipeline(device_id=dev_id, channel_id=ch_id) self.processor.set_pipeline(pipeline) self._cur_pipeline = pipeline self._en_chk.setChecked(pipeline.enabled) for f in pipeline.filters: self._add_filter_row(f) def _add_filter(self): key = list(FILTER_CLASSES.keys())[self._filt_cb.currentIndex()] filt = FILTER_CLASSES[key]() if self._cur_pipeline: self._cur_pipeline.filters.append(filt) self._add_filter_row(filt) self._push() def _add_filter_row(self, filt: FilterBase): row = FilterRow(filt) row.removed.connect(self._remove_filter) row.changed.connect(self._push) self._rows.append(row) self._filter_lay.addWidget(row) def _remove_filter(self, row: FilterRow): if self._cur_pipeline and row.filt in self._cur_pipeline.filters: self._cur_pipeline.filters.remove(row.filt) self._rows.remove(row) self._filter_lay.removeWidget(row); row.deleteLater() self._push() def _on_enable(self, v: bool): if self._cur_pipeline: self._cur_pipeline.enabled = v; self._push() def _apply_calibration(self, scale: float, offset: float): """Insert/replace a scale_offset filter at the END of the pipeline.""" if self._cur_pipeline is None: return # Remove existing scale_offset self._cur_pipeline.filters = [ f for f in self._cur_pipeline.filters if f.name != "scale_offset" ] cal_filt = ScaleOffsetFilter(scale=scale, offset=offset) self._cur_pipeline.filters.append(cal_filt) # Refresh rows for r in self._rows: self._filter_lay.removeWidget(r); r.deleteLater() self._rows.clear() for f in self._cur_pipeline.filters: self._add_filter_row(f) self._push() def _push(self): if self._cur_pipeline: self.processor.set_pipeline(self._cur_pipeline) self.changed.emit() # ══════════════════════════════════════════════════════════════════════════════ # Derived editor for one DerivedChannel # ══════════════════════════════════════════════════════════════════════════════ _BUILTIN = ["velocity","acceleration","power","rms","difference","sum"] _SCRIPT = ["expression","function","custom_script"] _ALL_KINDS = _BUILTIN + _SCRIPT _KIND_HELP = { "velocity": "Backward difference dy/dt from 1 displacement source", "acceleration": "Second derivative d²y/dt² from 1 displacement source", "power": "V × I from 2 sources (voltage, current)", "rms": "Rolling RMS from 1 source (set window below)", "difference": "source[0] − source[1] from 2 sources", "sum": "Σ all source values", "expression": "x = list of source values, t = elapsed time (s)\nExample: x[0] * 3.14159 / 180", "function": "def compute(x, t):\n # x = source values list\n return x[0] * 2.0", "custom_script":"Full Python. Must define: def compute(x, t): ...", } class DerivedBlock(QFrame): removed = pyqtSignal(object) applied = pyqtSignal(object) # DerivedChannel def __init__(self, dc: DerivedChannel, registry: DeviceRegistry, processor: SignalProcessor): super().__init__() self.dc = dc; self.registry = registry; self.processor = processor self.setObjectName("plotBlock") self._src_combos: List[QComboBox] = [] self._build() def _build(self): outer = QVBoxLayout(self); outer.setContentsMargins(0,0,0,0); outer.setSpacing(0) # Header hdr = QWidget(); hdr.setObjectName("plotBlockHeader"); hdr.setFixedHeight(32) hl = QHBoxLayout(hdr); hl.setContentsMargins(8,0,6,0) self._name = QLineEdit(self.dc.name); self._name.setObjectName("plotBlockTitle") self._name.textChanged.connect(lambda t: setattr(self.dc,"name",t)) hl.addWidget(self._name, 1) self._en = QCheckBox(); self._en.setChecked(self.dc.enabled) self._en.setToolTip("Enable"); self._en.toggled.connect(lambda v: setattr(self.dc,"enabled",v)) hl.addWidget(self._en) rm = QToolButton(); rm.setText("✕"); rm.setObjectName("plotRemoveBtn") rm.setFixedSize(22,22); rm.clicked.connect(lambda: self.removed.emit(self)) hl.addWidget(rm) outer.addWidget(hdr) # Body body = QWidget(); body.setObjectName("plotBlockSettings") bl = QVBoxLayout(body); bl.setContentsMargins(10,8,10,10); bl.setSpacing(6) # ID / unit / color row meta = QHBoxLayout() meta.addWidget(QLabel("ID:")); self._id = QLineEdit(self.dc.channel_id) self._id.setObjectName("traceLabel"); self._id.setFixedWidth(100) self._id.textChanged.connect(lambda t: setattr(self.dc,"channel_id",t)) meta.addWidget(self._id) meta.addWidget(QLabel("Unit:")); self._unit = QLineEdit(self.dc.unit) self._unit.setObjectName("traceLabel"); self._unit.setFixedWidth(60) self._unit.textChanged.connect(lambda t: setattr(self.dc,"unit",t)) meta.addWidget(self._unit); meta.addStretch() bl.addLayout(meta) # Kind + help k_row = QHBoxLayout(); k_row.addWidget(QLabel("Kind:")) self._kind_cb = QComboBox(); self._kind_cb.setObjectName("channelPickerCb") self._kind_cb.addItems(_ALL_KINDS); self._kind_cb.setCurrentText(self.dc.kind) self._kind_cb.currentTextChanged.connect(self._on_kind) k_row.addWidget(self._kind_cb); k_row.addStretch(); bl.addLayout(k_row) self._help = QLabel(_KIND_HELP.get(self.dc.kind,"")) self._help.setObjectName("traceSource"); self._help.setWordWrap(True) bl.addWidget(self._help) # RMS window (shown for rms) self._win_row = QHBoxLayout() self._win_row.addWidget(QLabel("Window samples:")) self._win_sp = QSpinBox(); self._win_sp.setRange(2,10000) self._win_sp.setValue(self.dc.params.get("window",20)) self._win_sp.setObjectName("traceWidthSpin"); self._win_sp.setFixedWidth(80) self._win_sp.valueChanged.connect(lambda v: self.dc.params.update({"window":v})) self._win_row.addWidget(self._win_sp); self._win_row.addStretch() self._win_widget = QWidget(); self._win_widget.setLayout(self._win_row) bl.addWidget(self._win_widget) # Sources src_grp = QGroupBox("Sources"); src_grp.setObjectName("cfgGlobalBar") src_lay = QVBoxLayout(src_grp); src_lay.setContentsMargins(6,4,6,4); src_lay.setSpacing(3) self._src_cont = QWidget(); self._src_vlay = QVBoxLayout(self._src_cont) self._src_vlay.setContentsMargins(0,0,0,0); self._src_vlay.setSpacing(3) for s in self.dc.sources: self._add_src(s) add_s = QPushButton("＋ Add Source"); add_s.setObjectName("addTraceBtn") add_s.clicked.connect(lambda: self._add_src()) src_lay.addWidget(self._src_cont); src_lay.addWidget(add_s) bl.addWidget(src_grp) # Code editor self._code_grp = QGroupBox("Code") code_lay = QVBoxLayout(self._code_grp); code_lay.setContentsMargins(6,4,6,4) self._code = QTextEdit(); self._code.setObjectName("codeEditor") self._code.setMinimumHeight(90); self._code.setMaximumHeight(180) txt = self.dc.expression if self.dc.kind=="expression" else self.dc.script self._code.setPlainText(txt) code_lay.addWidget(self._code) bl.addWidget(self._code_grp) # Status + apply ap_row = QHBoxLayout() self._st = QLabel(""); self._st.setObjectName("traceSource") ap_row.addWidget(self._st, 1) ap = QPushButton("✓ Apply"); ap.setObjectName("applyButton") ap.clicked.connect(self._apply); ap_row.addWidget(ap) bl.addLayout(ap_row) outer.addWidget(body) self._update_visibility() def _add_src(self, src=None): row = QHBoxLayout() cb = _channel_combo(self.registry, include_derived=False) cb.setObjectName("channelPickerCb") if src: for i in range(cb.count()): if cb.itemData(i) == src: cb.setCurrentIndex(i); break rm = QToolButton(); rm.setText("✕"); rm.setObjectName("traceRemoveBtn") rm.setFixedSize(22,22); rm.clicked.connect(lambda: self._rm_src(row, cb)) row.addWidget(cb,1); row.addWidget(rm) self._src_vlay.addLayout(row) self._src_combos.append(cb) def _rm_src(self, row, cb): if cb in self._src_combos: self._src_combos.remove(cb) while row.count(): it = row.takeAt(0) if it.widget(): it.widget().deleteLater() def _on_kind(self, k: str): self.dc.kind = k self._help.setText(_KIND_HELP.get(k,"")) self._update_visibility() def _update_visibility(self): is_script = self.dc.kind in _SCRIPT is_rms = self.dc.kind == "rms" self._code_grp.setVisible(is_script) self._win_widget.setVisible(is_rms) def _apply(self): self.dc.sources = [cb.currentData() for cb in self._src_combos if cb.currentData()] if self.dc.kind == "expression": self.dc.expression = self._code.toPlainText().strip() elif self.dc.kind in ("function","custom_script"): self.dc.script = self._code.toPlainText() err = self.processor.add_derived(self.dc) if err: self._st.setText(f"⚠ {err[:100]}") self._st.setStyleSheet("color:#ef4444;") else: self._st.setText("✓ Applied") self._st.setStyleSheet("color:#22c55e;") self.applied.emit(self.dc) # ══════════════════════════════════════════════════════════════════════════════ # Channel Visibility Tab # ══════════════════════════════════════════════════════════════════════════════ class ChannelVisTab(QWidget): changed = pyqtSignal() def __init__(self, registry: DeviceRegistry, processor: SignalProcessor): super().__init__() self.registry = registry self.processor = processor self._build() def _build(self): scroll = QScrollArea(); scroll.setWidgetResizable(True) scroll.setObjectName("deviceScroll") self._cont = QWidget() self._lay = QVBoxLayout(self._cont) self._lay.setContentsMargins(10,10,10,10); self._lay.setSpacing(8) scroll.setWidget(self._cont) root = QVBoxLayout(self); root.setContentsMargins(0,0,0,0) root.addWidget(scroll) self.refresh() def refresh(self): while self._lay.count(): it = self._lay.takeAt(0) if it.widget(): it.widget().deleteLater() for dev in self.registry.all_instances(): grp = QGroupBox(f"{dev.info.icon} {dev.info.name} [{dev.info.device_id}]") g_lay = QVBoxLayout(grp); g_lay.setSpacing(3) for ch in dev.info.channels: row = QHBoxLayout() chk = QCheckBox(f"{ch.channel_id} — {ch.name}") chk.setChecked(ch.enabled) chk.setStyleSheet(f"color:{ch.color};") chk.toggled.connect(lambda v, c=ch: (setattr(c,"enabled",v), self.changed.emit())) unit = QLabel(ch.unit); unit.setObjectName("traceSource") row.addWidget(chk,1); row.addWidget(unit) g_lay.addLayout(row) self._lay.addWidget(grp) self._lay.addStretch() # ══════════════════════════════════════════════════════════════════════════════ # SignalsWindow — main # ══════════════════════════════════════════════════════════════════════════════ class SignalsWindow(QWidget): pipeline_changed = pyqtSignal() derived_changed = pyqtSignal() visibility_changed = pyqtSignal() closed = pyqtSignal() def __init__(self, registry: DeviceRegistry, processor: SignalProcessor, parent=None): super().__init__(parent, Qt.WindowType.Window | Qt.WindowType.Tool) self.registry = registry self.processor = processor self._derived_blocks: List[DerivedBlock] = [] self._color_idx = 0 self.setWindowTitle("Signals") self.setMinimumSize(640, 520) self.resize(740, 640) self._build() def _build(self): root = QVBoxLayout(self); root.setContentsMargins(0,0,0,0); root.setSpacing(0) # Header hdr = QWidget(); hdr.setObjectName("devWindowTitleBar"); hdr.setFixedHeight(44) hl = QHBoxLayout(hdr); hl.setContentsMargins(14,0,14,0) hl.addWidget(QLabel("SIGNALS").also(lambda w: w.setObjectName("devWindowTitle")), 1) root.addWidget(hdr) div = QFrame(); div.setFrameShape(QFrame.Shape.HLine) div.setObjectName("devWindowDivider"); root.addWidget(div) tabs = QTabWidget(); tabs.setObjectName("signalBuilderTabs") root.addWidget(tabs, 1) # Tab 1: Pipeline / Filters / Calibration self._pip_tab = PipelineTab(self.registry, self.processor) self._pip_tab.changed.connect(self.pipeline_changed) tabs.addTab(self._pip_tab, " Pipeline ") # Tab 2: Derived channels tabs.addTab(self._build_derived_tab(), " Derived ") # Tab 3: Channel visibility self._vis_tab = ChannelVisTab(self.registry, self.processor) self._vis_tab.changed.connect(self.visibility_changed) tabs.addTab(self._vis_tab, " Channels ") def _build_derived_tab(self): w = QWidget() lay = QVBoxLayout(w); lay.setContentsMargins(0,0,0,0); lay.setSpacing(0) # Toolbar top = QWidget(); top.setObjectName("cfgGlobalBar") tl = QHBoxLayout(top); tl.setContentsMargins(10,7,10,7) tl.addWidget(QLabel("New:")) self._new_kind = QComboBox(); self._new_kind.setObjectName("channelPickerCb") self._new_kind.addItems(_ALL_KINDS); tl.addWidget(self._new_kind) cr = QPushButton("＋ Create Derived Channel") cr.setObjectName("addDeviceButton"); cr.clicked.connect(self._add_derived) tl.addWidget(cr); tl.addStretch() lay.addWidget(top) div = QFrame(); div.setFrameShape(QFrame.Shape.HLine) div.setObjectName("devWindowDivider"); lay.addWidget(div) scroll = QScrollArea(); scroll.setWidgetResizable(True) scroll.setObjectName("deviceScroll") self._d_cont = QWidget() self._d_lay = QVBoxLayout(self._d_cont) self._d_lay.setContentsMargins(10,10,10,10); self._d_lay.setSpacing(10) self._d_lay.addStretch() scroll.setWidget(self._d_cont) lay.addWidget(scroll, 1) return w def _add_derived(self): kind = self._new_kind.currentText() color = _DERIVED_COLORS[self._color_idx % len(_DERIVED_COLORS)] self._color_idx += 1 n = len(self._derived_blocks) + 1 dc = DerivedChannel(channel_id=f"sig_{n}", name=f"Signal {n}", kind=kind, color=color) blk = DerivedBlock(dc, self.registry, self.processor) blk.removed.connect(self._rm_derived) blk.applied.connect(lambda _: self.derived_changed.emit()) self._derived_blocks.append(blk) self._d_lay.insertWidget(self._d_lay.count()-1, blk) def _rm_derived(self, blk: DerivedBlock): self.processor.remove_derived(blk.dc.channel_id) self._derived_blocks.remove(blk) self._d_lay.removeWidget(blk); blk.deleteLater() self.derived_changed.emit() def closeEvent(self, e: QCloseEvent): self.closed.emit(); e.accept()