class FreqUnits(QWidget):
"""
Build and update widget for entering frequency unit, frequency range and
sampling frequency f_S
The following key-value pairs of the `fb.fil[0]` dict are modified:
- `'freq_specs_unit'` : The unit ('k', 'f_S', 'f_Ny', 'Hz' etc.) as a string
- `'freqSpecsRange'` : A list with two entries for minimum and maximum frequency
values for labelling the frequency axis
- `'f_S'` : The sampling frequency for referring frequency values to as a float
- `'f_max'` : maximum frequency for scaling frequency axis
- `'plt_fUnit'`: frequency unit as string
- `'plt_tUnit'`: time unit as string
- `'plt_fLabel'`: label for frequency axis
- `'plt_tLabel'`: label for time axis
"""
# class variables (shared between instances if more than one exists)
sig_tx = pyqtSignal(object) # outgoing
from pyfda.libs.pyfda_qt_lib import emit
def __init__(self, parent=None, title="Frequency Units"):
super(FreqUnits, self).__init__(parent)
self.title = title
self.spec_edited = False # flag whether QLineEdit field has been edited
self._construct_UI()
def _construct_UI(self):
"""
Construct the User Interface
"""
self.layVMain = QVBoxLayout() # Widget main layout
f_units = ['k', 'f_S', 'f_Ny', 'Hz', 'kHz', 'MHz', 'GHz']
self.t_units = ['', 'T_S', 'T_S', 's', 'ms', r'$\mu$s', 'ns']
bfont = QFont()
bfont.setBold(True)
self.lblUnits = QLabel(self)
self.lblUnits.setText("Freq. Unit")
self.lblUnits.setFont(bfont)
self.fs_old = fb.fil[0]['f_S'] # store current sampling frequency
self.lblF_S = QLabel(self)
self.lblF_S.setText(to_html("f_S =", frmt='bi'))
self.ledF_S = QLineEdit()
self.ledF_S.setText(str(fb.fil[0]["f_S"]))
self.ledF_S.setObjectName("f_S")
self.ledF_S.installEventFilter(self) # filter events
self.butLock = QToolButton(self)
self.butLock.setIcon(QIcon(':/lock-unlocked.svg'))
self.butLock.setCheckable(True)
self.butLock.setChecked(False)
self.butLock.setToolTip(
"<span><b>Unlocked:</b> When f_S is changed, all frequency related "
"widgets are updated, normalized frequencies stay the same.<br />"
"<b>Locked:</b> When f_S is changed, displayed absolute frequency "
"values don't change but normalized frequencies do.</span>")
# self.butLock.setStyleSheet("QToolButton:checked {font-weight:bold}")
layHF_S = QHBoxLayout()
layHF_S.addWidget(self.ledF_S)
layHF_S.addWidget(self.butLock)
self.cmbUnits = QComboBox(self)
self.cmbUnits.setObjectName("cmbUnits")
self.cmbUnits.addItems(f_units)
self.cmbUnits.setToolTip(
'Select whether frequencies are specified w.r.t. \n'
'the sampling frequency "f_S", to the Nyquist frequency \n'
'f_Ny = f_S/2 or as absolute values. "k" specifies frequencies w.r.t. f_S '
'but plots graphs over the frequency index k.')
self.cmbUnits.setCurrentIndex(1)
# self.cmbUnits.setItemData(0, (0,QColor("#FF333D"),Qt.BackgroundColorRole))#
# self.cmbUnits.setItemData(0, (QFont('Verdana', bold=True), Qt.FontRole)
fRanges = [("0...½", "half"), ("0...1", "whole"), ("-½...½", "sym")]
self.cmbFRange = QComboBox(self)
self.cmbFRange.setObjectName("cmbFRange")
for f in fRanges:
self.cmbFRange.addItem(f[0], f[1])
self.cmbFRange.setToolTip("Select frequency range (whole or half).")
self.cmbFRange.setCurrentIndex(0)
# Combobox resizes with longest entry
self.cmbUnits.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.cmbFRange.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.butSort = QToolButton(self)
self.butSort.setText("Sort")
self.butSort.setIcon(QIcon(':/sort-ascending.svg'))
#self.butDelCells.setIconSize(q_icon_size)
self.butSort.setCheckable(True)
self.butSort.setChecked(True)
self.butSort.setToolTip(
"Sort frequencies in ascending order when pushed.")
self.butSort.setStyleSheet("QToolButton:checked {font-weight:bold}")
self.layHUnits = QHBoxLayout()
self.layHUnits.addWidget(self.cmbUnits)
self.layHUnits.addWidget(self.cmbFRange)
self.layHUnits.addWidget(self.butSort)
# Create a gridLayout consisting of QLabel and QLineEdit fields
# for setting f_S, the units and the actual frequency specs:
self.layGSpecWdg = QGridLayout() # sublayout for spec fields
self.layGSpecWdg.addWidget(self.lblF_S, 1, 0)
# self.layGSpecWdg.addWidget(self.ledF_S,1,1)
self.layGSpecWdg.addLayout(layHF_S, 1, 1)
self.layGSpecWdg.addWidget(self.lblUnits, 0, 0)
self.layGSpecWdg.addLayout(self.layHUnits, 0, 1)
frmMain = QFrame(self)
frmMain.setLayout(self.layGSpecWdg)
self.layVMain.addWidget(frmMain)
self.layVMain.setContentsMargins(*params['wdg_margins'])
self.setLayout(self.layVMain)
#----------------------------------------------------------------------
# LOCAL SIGNALS & SLOTs
#----------------------------------------------------------------------
self.cmbUnits.currentIndexChanged.connect(self.update_UI)
self.butLock.clicked.connect(self._lock_freqs)
self.cmbFRange.currentIndexChanged.connect(self._freq_range)
self.butSort.clicked.connect(self._store_sort_flag)
# ----------------------------------------------------------------------
self.update_UI() # first-time initialization
# -------------------------------------------------------------
def _lock_freqs(self):
"""
Lock / unlock frequency entries: The values of frequency related widgets
are stored in normalized form (w.r.t. sampling frequency)`fb.fil[0]['f_S']`.
When the sampling frequency changes, absolute frequencies displayed in the
widgets change their values. Most of the time, this is the desired behaviour,
the properties of discrete time systems or signals are usually defined
by the normalized frequencies.
When the effect of varying the sampling frequency is to be analyzed, the
displayed values in the widgets can be locked by pressing the Lock button.
After changing the sampling frequency, normalized frequencies have to be
rescaled like `f_a *= fb.fil[0]['f_S_prev'] / fb.fil[0]['f_S']` to maintain
the displayed value `f_a * f_S`.
This has to be accomplished by each frequency widget (currently, these are
freq_specs and freq_units).
The setting is stored as bool in the global dict entry `fb.fil[0]['freq_locked'`,
the signal 'view_changed':'f_S' is emitted.
"""
if self.butLock.isChecked():
# Lock has been activated, keep displayed frequencies locked
fb.fil[0]['freq_locked'] = True
self.butLock.setIcon(QIcon(':/lock-locked.svg'))
else:
# Lock has been unlocked, scale displayed frequencies with f_S
fb.fil[0]['freq_locked'] = False
self.butLock.setIcon(QIcon(':/lock-unlocked.svg'))
self.emit({'view_changed': 'f_S'})
# -------------------------------------------------------------
def update_UI(self):
"""
update_UI is called
- during init
- when the unit combobox is changed
Set various scale factors and labels depending on the setting of the unit
combobox.
Update the freqSpecsRange and finally, emit 'view_changed':'f_S' signal
"""
f_unit = str(self.cmbUnits.currentText()) # selected frequency unit
idx = self.cmbUnits.currentIndex() # and its index
is_normalized_freq = f_unit in {"f_S", "f_Ny", "k"}
self.ledF_S.setVisible(not is_normalized_freq) # only vis. when
self.lblF_S.setVisible(not is_normalized_freq) # not normalized
self.butLock.setVisible(not is_normalized_freq)
f_S_scale = 1 # default setting for f_S scale
if is_normalized_freq:
# store current sampling frequency to restore it when returning to
# unnormalized frequencies
self.fs_old = fb.fil[0]['f_S']
if f_unit == "f_S": # normalized to f_S
fb.fil[0]['f_S'] = fb.fil[0]['f_max'] = 1.
fb.fil[0]['T_S'] = 1.
f_label = r"$F = f\, /\, f_S = \Omega \, /\, 2 \mathrm{\pi} \; \rightarrow$"
t_label = r"$n = t\, /\, T_S \; \rightarrow$"
elif f_unit == "f_Ny": # normalized to f_nyq = f_S / 2
fb.fil[0]['f_S'] = fb.fil[0]['f_max'] = 2.
fb.fil[0]['T_S'] = 1.
f_label = r"$F = 2f \, / \, f_S = \Omega \, / \, \mathrm{\pi} \; \rightarrow$"
t_label = r"$n = t\, /\, T_S \; \rightarrow$"
else: # frequency index k,
fb.fil[0]['f_S'] = 1.
fb.fil[0]['T_S'] = 1.
fb.fil[0]['f_max'] = params['N_FFT']
f_label = r"$k \; \rightarrow$"
t_label = r"$n\; \rightarrow$"
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
else: # Hz, kHz, ...
# Restore sampling frequency when returning from f_S / f_Ny / k
if fb.fil[0]['freq_specs_unit'] in {
"f_S", "f_Ny", "k"
}: # previous setting normalized?
fb.fil[0]['f_S'] = fb.fil[0][
'f_max'] = self.fs_old # yes, restore prev.
fb.fil[0][
'T_S'] = 1. / self.fs_old # settings for sampling frequency
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
if f_unit == "Hz":
f_S_scale = 1.
elif f_unit == "kHz":
f_S_scale = 1.e3
elif f_unit == "MHz":
f_S_scale = 1.e6
elif f_unit == "GHz":
f_S_scale = 1.e9
else:
logger.warning("Unknown frequency unit {0}".format(f_unit))
f_label = r"$f$ in " + f_unit + r"$\; \rightarrow$"
t_label = r"$t$ in " + self.t_units[idx] + r"$\; \rightarrow$"
if f_unit == "k":
plt_f_unit = "f_S"
else:
plt_f_unit = f_unit
fb.fil[0].update({'f_S_scale':
f_S_scale}) # scale factor for f_S (Hz, kHz, ...)
fb.fil[0].update({'freq_specs_unit': f_unit}) # frequency unit
# time and frequency unit as string e.g. for plot axis labeling
fb.fil[0].update({"plt_fUnit": plt_f_unit})
fb.fil[0].update({"plt_tUnit": self.t_units[idx]})
# complete plot axis labels including unit and arrow
fb.fil[0].update({"plt_fLabel": f_label})
fb.fil[0].update({"plt_tLabel": t_label})
self._freq_range(
emit=False) # update f_lim setting without emitting signal
self.emit({'view_changed': 'f_S'})
# ------------------------------------------------------------------------------
def eventFilter(self, source, event):
"""
Filter all events generated by the QLineEdit `f_S` widget. Source and type
of all events generated by monitored objects are passed to this eventFilter,
evaluated and passed on to the next hierarchy level.
- When a QLineEdit widget gains input focus (QEvent.FocusIn`), display
the stored value from filter dict with full precision
- When a key is pressed inside the text field, set the `spec_edited` flag
to True.
- When a QLineEdit widget loses input focus (QEvent.FocusOut`), store
current value with full precision (only if `spec_edited`== True) and
display the stored value in selected format. Emit 'view_changed':'f_S'
"""
def _store_entry():
"""
Update filter dictionary, set line edit entry with reduced precision
again.
"""
if self.spec_edited:
fb.fil[0].update({'f_S_prev': fb.fil[0]['f_S']})
fb.fil[0].update({
'f_S':
safe_eval(source.text(), fb.fil[0]['f_S'], sign='pos')
})
fb.fil[0].update({'T_S': 1. / fb.fil[0]['f_S']})
fb.fil[0].update({'f_max': fb.fil[0]['f_S']})
self._freq_range(emit=False) # update plotting range
self.emit({'view_changed': 'f_S'})
self.spec_edited = False # reset flag, changed entry has been saved
if source.objectName() == 'f_S':
if event.type() == QEvent.FocusIn:
self.spec_edited = False
source.setText(str(fb.fil[0]['f_S'])) # full precision
elif event.type() == QEvent.KeyPress:
self.spec_edited = True # entry has been changed
key = event.key()
if key in {QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter}:
_store_entry()
elif key == QtCore.Qt.Key_Escape: # revert changes
self.spec_edited = False
source.setText(str(fb.fil[0]['f_S'])) # full precision
elif event.type() == QEvent.FocusOut:
_store_entry()
source.setText(params['FMT'].format(
fb.fil[0]['f_S'])) # reduced prec.
# Call base class method to continue normal event processing:
return super(FreqUnits, self).eventFilter(source, event)
# -------------------------------------------------------------
def _freq_range(self, emit=True):
"""
Set frequency plotting range for single-sided spectrum up to f_S/2 or f_S
or for double-sided spectrum between -f_S/2 and f_S/2
Emit 'view_changed':'f_range' when `emit=True`
"""
if type(emit) == int: # signal was emitted by combobox
emit = True
rangeType = qget_cmb_box(self.cmbFRange)
fb.fil[0].update({'freqSpecsRangeType': rangeType})
f_max = fb.fil[0]["f_max"]
if rangeType == 'whole':
f_lim = [0, f_max]
elif rangeType == 'sym':
f_lim = [-f_max / 2., f_max / 2.]
else:
f_lim = [0, f_max / 2.]
fb.fil[0]['freqSpecsRange'] = f_lim # store settings in dict
if emit:
self.emit({'view_changed': 'f_range'})
# -------------------------------------------------------------
def load_dict(self):
"""
Reload comboBox settings and textfields from filter dictionary
Block signals during update of combobox / lineedit widgets
"""
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
self.cmbUnits.blockSignals(True)
idx = self.cmbUnits.findText(
fb.fil[0]['freq_specs_unit']) # get and set
self.cmbUnits.setCurrentIndex(idx) # index for freq. unit combo box
self.cmbUnits.blockSignals(False)
self.cmbFRange.blockSignals(True)
idx = self.cmbFRange.findData(fb.fil[0]['freqSpecsRangeType'])
self.cmbFRange.setCurrentIndex(idx) # set frequency range
self.cmbFRange.blockSignals(False)
self.butSort.blockSignals(True)
self.butSort.setChecked(fb.fil[0]['freq_specs_sort'])
self.butSort.blockSignals(False)
# -------------------------------------------------------------
def _store_sort_flag(self):
"""
Store sort flag in filter dict and emit 'specs_changed':'f_sort'
when sort button is checked.
"""
fb.fil[0]['freq_specs_sort'] = self.butSort.isChecked()
if self.butSort.isChecked():
self.emit({'specs_changed': 'f_sort'})
class FreqUnits(QWidget):
"""
Build and update widget for entering the frequency units
The following key-value pairs of the `fb.fil[0]` dict are modified:
- `'freq_specs_unit'` : The unit ('k', 'f_S', 'f_Ny', 'Hz' etc.) as a string
- `'freqSpecsRange'` : A list with two entries for minimum and maximum frequency
values for labelling the frequency axis
- `'f_S'` : The sampling frequency for referring frequency values to as a float
- `'f_max'` : maximum frequency for scaling frequency axis
- `'plt_fUnit'`: frequency unit as string
- `'plt_tUnit'`: time unit as string
- `'plt_fLabel'`: label for frequency axis
- `'plt_tLabel'`: label for time axis
"""
# class variables (shared between instances if more than one exists)
sig_tx = pyqtSignal(object) # outgoing
def __init__(self, parent, title="Frequency Units"):
super(FreqUnits, self).__init__(parent)
self.title = title
self.spec_edited = False # flag whether QLineEdit field has been edited
self._construct_UI()
def _construct_UI(self):
"""
Construct the User Interface
"""
self.layVMain = QVBoxLayout() # Widget main layout
f_units = ['k', 'f_S', 'f_Ny', 'Hz', 'kHz', 'MHz', 'GHz']
self.t_units = ['', '', '', 's', 'ms', r'$\mu$s', 'ns']
bfont = QFont()
bfont.setBold(True)
self.lblUnits = QLabel(self)
self.lblUnits.setText("Freq. Unit:")
self.lblUnits.setFont(bfont)
self.fs_old = fb.fil[0]['f_S'] # store current sampling frequency
self.ledF_S = QLineEdit()
self.ledF_S.setText(str(fb.fil[0]["f_S"]))
self.ledF_S.setObjectName("f_S")
self.ledF_S.installEventFilter(self) # filter events
self.lblF_S = QLabel(self)
self.lblF_S.setText(to_html("f_S", frmt='bi'))
self.cmbUnits = QComboBox(self)
self.cmbUnits.setObjectName("cmbUnits")
self.cmbUnits.addItems(f_units)
self.cmbUnits.setToolTip(
'Select whether frequencies are specified w.r.t. \n'
'the sampling frequency "f_S", to the Nyquist frequency \n'
'f_Ny = f_S/2 or as absolute values. "k" specifies frequencies w.r.t. f_S '
'but plots graphs over the frequency index k.')
self.cmbUnits.setCurrentIndex(1)
# self.cmbUnits.setItemData(0, (0,QColor("#FF333D"),Qt.BackgroundColorRole))#
# self.cmbUnits.setItemData(0, (QFont('Verdana', bold=True), Qt.FontRole)
fRanges = [("0...½", "half"), ("0...1", "whole"), ("-½...½", "sym")]
self.cmbFRange = QComboBox(self)
self.cmbFRange.setObjectName("cmbFRange")
for f in fRanges:
self.cmbFRange.addItem(f[0], f[1])
self.cmbFRange.setToolTip("Select frequency range (whole or half).")
self.cmbFRange.setCurrentIndex(0)
# Combobox resizes with longest entry
self.cmbUnits.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.cmbFRange.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.butSort = QToolButton(self)
self.butSort.setText("Sort")
self.butSort.setCheckable(True)
self.butSort.setChecked(True)
self.butSort.setToolTip(
"Sort frequencies in ascending order when pushed.")
self.butSort.setStyleSheet("QToolButton:checked {font-weight:bold}")
self.layHUnits = QHBoxLayout()
self.layHUnits.addWidget(self.cmbUnits)
self.layHUnits.addWidget(self.cmbFRange)
self.layHUnits.addWidget(self.butSort)
# Create a gridLayout consisting of QLabel and QLineEdit fields
# for setting f_S, the units and the actual frequency specs:
self.layGSpecWdg = QGridLayout() # sublayout for spec fields
self.layGSpecWdg.addWidget(self.lblF_S, 1, 0)
self.layGSpecWdg.addWidget(self.ledF_S, 1, 1)
self.layGSpecWdg.addWidget(self.lblUnits, 0, 0)
self.layGSpecWdg.addLayout(self.layHUnits, 0, 1)
frmMain = QFrame(self)
frmMain.setLayout(self.layGSpecWdg)
self.layVMain.addWidget(frmMain)
self.layVMain.setContentsMargins(*params['wdg_margins'])
self.setLayout(self.layVMain)
#----------------------------------------------------------------------
# LOCAL SIGNALS & SLOTs
#----------------------------------------------------------------------
self.cmbUnits.currentIndexChanged.connect(self.update_UI)
self.cmbFRange.currentIndexChanged.connect(self._freq_range)
self.butSort.clicked.connect(self._store_sort_flag)
#----------------------------------------------------------------------
self.update_UI() # first-time initialization
#-------------------------------------------------------------
def update_UI(self):
"""
Transform the displayed frequency spec input fields according to the units
setting. Spec entries are always stored normalized w.r.t. f_S in the
dictionary; when f_S or the unit are changed, only the displayed values
of the frequency entries are updated, not the dictionary!
Signals are blocked before changing the value for f_S programmatically
update_UI is called
- during init
- when the unit combobox is changed
Finally, store freqSpecsRange and emit 'view_changed' signal via _freq_range
"""
idx = self.cmbUnits.currentIndex() # read index of units combobox
f_unit = str(self.cmbUnits.currentText()) # and the label
self.ledF_S.setVisible(f_unit not in {"f_S", "f_Ny",
"k"}) # only vis. when
self.lblF_S.setVisible(f_unit not in {"f_S", "f_Ny",
"k"}) # not normalized
f_S_scale = 1 # default setting for f_S scale
if f_unit in {"f_S", "f_Ny", "k"}: # normalized frequency
self.fs_old = fb.fil[0]['f_S'] # store current sampling frequency
if f_unit == "f_S": # normalized to f_S
fb.fil[0]['f_S'] = fb.fil[0]['f_max'] = 1.
f_label = r"$F = f\, /\, f_S = \Omega \, /\, 2 \mathrm{\pi} \; \rightarrow$"
elif f_unit == "f_Ny": # idx == 1: normalized to f_nyq = f_S / 2
fb.fil[0]['f_S'] = fb.fil[0]['f_max'] = 2.
f_label = r"$F = 2f \, / \, f_S = \Omega \, / \, \mathrm{\pi} \; \rightarrow$"
else:
fb.fil[0]['f_S'] = 1
fb.fil[0]['f_max'] = params['N_FFT']
f_label = r"$k \; \rightarrow$"
t_label = r"$n \; \rightarrow$"
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
else: # Hz, kHz, ...
if fb.fil[0]['freq_specs_unit'] in {"f_S", "f_Ny",
"k"}: # previous setting
fb.fil[0]['f_S'] = fb.fil[0][
'f_max'] = self.fs_old # restore prev. sampling frequency
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
if f_unit == "Hz":
f_S_scale = 1.
elif f_unit == "kHz":
f_S_scale = 1.e3
elif f_unit == "MHz":
f_S_scale = 1.e6
elif f_unit == "GHz":
f_S_scale = 1.e9
else:
logger.warning("Unknown frequency unit {0}".format(f_unit))
f_label = r"$f$ in " + f_unit + r"$\; \rightarrow$"
t_label = r"$t$ in " + self.t_units[idx] + r"$\; \rightarrow$"
if f_unit == "k":
plt_f_unit = "f_S"
else:
plt_f_unit = f_unit
fb.fil[0].update({'f_S_scale': f_S_scale}) # scale factor for f_S
fb.fil[0].update({'freq_specs_unit': f_unit}) # frequency unit
fb.fil[0].update({"plt_fLabel": f_label}) # label for freq. axis
fb.fil[0].update({"plt_tLabel": t_label}) # label for time axis
fb.fil[0].update({"plt_fUnit": plt_f_unit}) # frequency unit as string
fb.fil[0].update({"plt_tUnit":
self.t_units[idx]}) # time unit as string
self._freq_range(
) # update f_lim setting and emit sigUnitChanged signal
#------------------------------------------------------------------------------
def eventFilter(self, source, event):
"""
Filter all events generated by the QLineEdit widgets. Source and type
of all events generated by monitored objects are passed to this eventFilter,
evaluated and passed on to the next hierarchy level.
- When a QLineEdit widget gains input focus (QEvent.FocusIn`), display
the stored value from filter dict with full precision
- When a key is pressed inside the text field, set the `spec_edited` flag
to True.
- When a QLineEdit widget loses input focus (QEvent.FocusOut`), store
current value with full precision (only if `spec_edited`== True) and
display the stored value in selected format. Emit 'view_changed':'f_S'
"""
def _store_entry():
"""
Update filter dictionary, set line edit entry with reduced precision
again.
"""
if self.spec_edited:
fb.fil[0].update({
'f_S':
safe_eval(source.text(), fb.fil[0]['f_S'], sign='pos')
})
# TODO: ?!
self._freq_range(emit_sig_range=False) # update plotting range
self.sig_tx.emit({'sender': __name__, 'view_changed': 'f_S'})
self.spec_edited = False # reset flag, changed entry has been saved
if source.objectName() == 'f_S':
if event.type() == QEvent.FocusIn:
self.spec_edited = False
source.setText(str(fb.fil[0]['f_S'])) # full precision
elif event.type() == QEvent.KeyPress:
self.spec_edited = True # entry has been changed
key = event.key()
if key in {QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter}:
_store_entry()
elif key == QtCore.Qt.Key_Escape: # revert changes
self.spec_edited = False
source.setText(str(fb.fil[0]['f_S'])) # full precision
elif event.type() == QEvent.FocusOut:
_store_entry()
source.setText(params['FMT'].format(
fb.fil[0]['f_S'])) # reduced precision
# Call base class method to continue normal event processing:
return super(FreqUnits, self).eventFilter(source, event)
#-------------------------------------------------------------
def _freq_range(self, emit_sig_range=True):
"""
Set frequency plotting range for single-sided spectrum up to f_S/2 or f_S
or for double-sided spectrum between -f_S/2 and f_S/2 and emit
'view_changed':'f_range'.
"""
rangeType = qget_cmb_box(self.cmbFRange)
fb.fil[0].update({'freqSpecsRangeType': rangeType})
f_max = fb.fil[0]["f_max"]
if rangeType == 'whole':
f_lim = [0, f_max]
elif rangeType == 'sym':
f_lim = [-f_max / 2., f_max / 2.]
else:
f_lim = [0, f_max / 2.]
fb.fil[0]['freqSpecsRange'] = f_lim # store settings in dict
self.sig_tx.emit({'sender': __name__, 'view_changed': 'f_range'})
#-------------------------------------------------------------
def load_dict(self):
"""
Reload comboBox settings and textfields from filter dictionary
Block signals during update of combobox / lineedit widgets
"""
self.ledF_S.setText(params['FMT'].format(fb.fil[0]['f_S']))
self.cmbUnits.blockSignals(True)
idx = self.cmbUnits.findText(
fb.fil[0]['freq_specs_unit']) # get and set
self.cmbUnits.setCurrentIndex(idx) # index for freq. unit combo box
self.cmbUnits.blockSignals(False)
self.cmbFRange.blockSignals(True)
idx = self.cmbFRange.findData(fb.fil[0]['freqSpecsRangeType'])
self.cmbFRange.setCurrentIndex(idx) # set frequency range
self.cmbFRange.blockSignals(False)
self.butSort.blockSignals(True)
self.butSort.setChecked(fb.fil[0]['freq_specs_sort'])
self.butSort.blockSignals(False)
#-------------------------------------------------------------
def _store_sort_flag(self):
"""
Store sort flag in filter dict and emit 'specs_changed':'f_sort'
when sort button is checked.
"""
fb.fil[0]['freq_specs_sort'] = self.butSort.isChecked()
if self.butSort.isChecked():
self.sig_tx.emit({'sender': __name__, 'specs_changed': 'f_sort'})
class Input_Fixpoint_Specs(QWidget):
"""
Create the widget that holds the dynamically loaded fixpoint filter ui
"""
# sig_resize = pyqtSignal() # emit a signal when the image has been resized
sig_rx_local = pyqtSignal(object) # incoming from subwidgets -> process_sig_rx_local
sig_rx = pyqtSignal(object) # incoming, connected to input_tab_widget.sig_rx
sig_tx = pyqtSignal(object) # outcgoing
from pyfda.libs.pyfda_qt_lib import emit
def __init__(self, parent=None):
super(Input_Fixpoint_Specs, self).__init__(parent)
self.tab_label = 'Fixpoint'
self.tool_tip = ("<span>Select a fixpoint implementation for the filter,"
" simulate it or generate a Verilog netlist.</span>")
self.parent = parent
self.fx_path = os.path.realpath(
os.path.join(dirs.INSTALL_DIR, 'fixpoint_widgets'))
self.no_fx_filter_img = os.path.join(self.fx_path, "no_fx_filter.png")
if not os.path.isfile(self.no_fx_filter_img):
logger.error("Image {0:s} not found!".format(self.no_fx_filter_img))
self.default_fx_img = os.path.join(self.fx_path, "default_fx_img.png")
if not os.path.isfile(self.default_fx_img):
logger.error("Image {0:s} not found!".format(self.default_fx_img))
self._construct_UI()
inst_wdg_list = self._update_filter_cmb()
if len(inst_wdg_list) == 0:
logger.warning("No fixpoint filter found for this type of filter!")
else:
logger.debug("Imported {0:d} fixpoint filters:\n{1}"
.format(len(inst_wdg_list.split("\n"))-1, inst_wdg_list))
self._update_fixp_widget()
# ------------------------------------------------------------------------------
def process_sig_rx_local(self, dict_sig: dict = None) -> None:
"""
Process signals coming in from input and output quantizer subwidget and the
dynamically instantiated subwidget and emit {'fx_sim': 'specs_changed'} in
the end.
"""
if dict_sig['id'] == id(self):
logger.warning(f'RX_LOCAL - Stopped infinite loop: "{first_item(dict_sig)}"')
return
elif 'fx_sim' in dict_sig and dict_sig['fx_sim'] == 'specs_changed':
self.wdg_dict2ui() # update wordlengths in UI and set RUN button to 'changed'
dict_sig.update({'id': id(self)}) # propagate 'specs_changed' with self 'id'
self.emit(dict_sig)
return
# ---- Process input and output quantizer settings ('ui' in dict_sig) --
elif 'ui' in dict_sig:
if 'wdg_name' not in dict_sig:
logger.warning(f"No key 'wdg_name' in dict_sig:\n{pprint_log(dict_sig)}")
return
elif dict_sig['wdg_name'] == 'w_input':
"""
Input fixpoint format has been changed or butLock has been clicked.
When I/O lock is active, copy input fixpoint word format to output
word format.
"""
if dict_sig['ui'] == 'butLock'\
and not self.wdg_w_input.butLock.isChecked():
# butLock was deactivitated, don't do anything
return
elif self.wdg_w_input.butLock.isChecked():
# but lock was activated or wordlength setting have been changed
fb.fil[0]['fxqc']['QO']['WI'] = fb.fil[0]['fxqc']['QI']['WI']
fb.fil[0]['fxqc']['QO']['WF'] = fb.fil[0]['fxqc']['QI']['WF']
fb.fil[0]['fxqc']['QO']['W'] = fb.fil[0]['fxqc']['QI']['W']
elif dict_sig['wdg_name'] == 'w_output':
"""
Output fixpoint format has been changed. When I/O lock is active, copy
output fixpoint word format to input word format.
"""
if self.wdg_w_input.butLock.isChecked():
fb.fil[0]['fxqc']['QI']['WI'] = fb.fil[0]['fxqc']['QO']['WI']
fb.fil[0]['fxqc']['QI']['WF'] = fb.fil[0]['fxqc']['QO']['WF']
fb.fil[0]['fxqc']['QI']['W'] = fb.fil[0]['fxqc']['QO']['W']
elif dict_sig['wdg_name'] in {'q_output', 'q_input'}:
pass
else:
logger.error("Unknown wdg_name '{0}' in dict_sig:\n{1}"
.format(dict_sig['wdg_name'], pprint_log(dict_sig)))
return
if dict_sig['ui'] not in {'WI', 'WF', 'ovfl', 'quant', 'cmbW', 'butLock'}:
logger.warning("Unknown value '{0}' for key 'ui'".format(dict_sig['ui']))
self.wdg_dict2ui() # update wordlengths in UI and set RUN button to 'changed'
self.emit({'fx_sim': 'specs_changed'}) # propagate 'specs_changed'
else:
logger.error(f"Unknown key/value in 'dict_sig':\n{pprint_log(dict_sig)}")
# ------------------------------------------------------------------------------
def process_sig_rx(self, dict_sig: dict = None) -> None:
"""
Process signals coming in via `sig_rx` from other widgets.
Trigger fx simulation:
1. ``fx_sim': 'init'``: Start fixpoint simulation by sending
'fx_sim':'start_fx_response_calculation'
2. ``fx_sim_calc_response()``: Receive stimulus from widget in
'fx_sim':'calc_frame_fx_response' and pass it to fixpoint simulation method
3. Store fixpoint response in `fb.fx_result` and return to initiating routine
"""
# logger.info(
# "SIG_RX(): vis={0}\n{1}".format(self.isVisible(), pprint_log(dict_sig)))
# logger.debug(f'SIG_RX(): "{first_item(dict_sig)}"')
if dict_sig['id'] == id(self):
# logger.warning(f'Stopped infinite loop: "{first_item(dict_sig)}"')
return
elif 'data_changed' in dict_sig and dict_sig['data_changed'] == "filter_designed":
# New filter has been designed, update list of available filter topologies
self._update_filter_cmb()
return
elif 'data_changed' in dict_sig or\
('view_changed' in dict_sig and dict_sig['view_changed'] == 'q_coeff'):
# Filter data has changed (but not the filter type) or the coefficient
# format / wordlength have been changed in `input_coeffs`. The latter means
# the view / display has been changed (wordlength) but not the actual
# coefficients in the `input_coeffs` widget. However, the wordlength setting
# is copied to the fxqc dict and from there to the fixpoint widget.
# - update fields in the fixpoint filter widget - wordlength may have
# been changed.
# - Set RUN button to "changed" in wdg_dict2ui()
self.wdg_dict2ui()
# --------------- FX Simulation -------------------------------------------
elif 'fx_sim' in dict_sig:
if dict_sig['fx_sim'] == 'init':
# fixpoint simulation has been started externally, e.g. by
# `impz.impz_init()`, return a handle to the fixpoint filter function
# via signal-slot connection
if not self.fx_wdg_found:
logger.error("No fixpoint widget found!")
qstyle_widget(self.butSimFx, "error")
self.emit({'fx_sim': 'error'})
elif self.fx_sim_init() != 0: # returned an error
qstyle_widget(self.butSimFx, "error")
self.emit({'fx_sim': 'error'})
else:
self.emit({'fx_sim': 'start_fx_response_calculation',
'fxfilter_func': self.fx_filt_ui.fxfilter})
elif dict_sig['fx_sim'] == 'calc_frame_fx_response':
self.fx_sim_calc_response(dict_sig)
# return to the routine collecting the response frame by frame
return
elif dict_sig['fx_sim'] == 'specs_changed':
# fixpoint specification have been changed somewhere, update ui
# and set run button to "changed" in wdg_dict2ui()
self.wdg_dict2ui()
elif dict_sig['fx_sim'] == 'finish':
qstyle_widget(self.butSimFx, "normal")
else:
logger.error('Unknown "fx_sim" command option "{0}"\n'
'\treceived from "{1}".'
.format(dict_sig['fx_sim'], dict_sig['class']))
# ---- resize image when "Fixpoint" tab is selected or widget size is changed:
elif 'ui_changed' in dict_sig and dict_sig['ui_changed'] in {'resized', 'tab'}\
and self.isVisible():
self.resize_img()
# ------------------------------------------------------------------------------
def _construct_UI(self) -> None:
"""
Intitialize the main GUI, consisting of:
- A combo box to select the filter topology and an image of the topology
- The input quantizer
- The UI of the fixpoint filter widget
- Simulation and export buttons
"""
# ------------------------------------------------------------------------------
# Define frame and layout for the dynamically updated filter widget
# The actual filter widget is instantiated in self.set_fixp_widget() later on
self.layH_fx_wdg = QHBoxLayout()
# self.layH_fx_wdg.setContentsMargins(*params['wdg_margins'])
frmHDL_wdg = QFrame(self)
frmHDL_wdg.setLayout(self.layH_fx_wdg)
# frmHDL_wdg.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
# ------------------------------------------------------------------------------
# Initialize fixpoint filter combobox, title and description
# ------------------------------------------------------------------------------
self.cmb_fx_wdg = QComboBox(self)
self.cmb_fx_wdg.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.lblTitle = QLabel("not set", self)
self.lblTitle.setWordWrap(True)
self.lblTitle.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
layHTitle = QHBoxLayout()
layHTitle.addWidget(self.cmb_fx_wdg)
layHTitle.addWidget(self.lblTitle)
self.frmTitle = QFrame(self)
self.frmTitle.setLayout(layHTitle)
self.frmTitle.setContentsMargins(*params['wdg_margins'])
# ------------------------------------------------------------------------------
# Input and Output Quantizer
# ------------------------------------------------------------------------------
# - instantiate widgets for input and output quantizer
# - pass the quantization (sub-?) dictionary to the constructor
# ------------------------------------------------------------------------------
self.wdg_w_input = UI_W(self, q_dict=fb.fil[0]['fxqc']['QI'],
wdg_name='w_input', label='', lock_visible=True)
self.wdg_w_input.sig_tx.connect(self.process_sig_rx_local)
cmb_q = ['round', 'floor', 'fix']
self.wdg_w_output = UI_W(self, q_dict=fb.fil[0]['fxqc']['QO'],
wdg_name='w_output', label='')
self.wdg_w_output.sig_tx.connect(self.process_sig_rx_local)
self.wdg_q_output = UI_Q(self, q_dict=fb.fil[0]['fxqc']['QO'],
wdg_name='q_output',
label='Output Format <i>Q<sub>Y </sub></i>:',
cmb_q=cmb_q, cmb_ov=['wrap', 'sat'])
self.wdg_q_output.sig_tx.connect(self.sig_rx_local)
if HAS_DS:
cmb_q.append('dsm')
self.wdg_q_input = UI_Q(self, q_dict=fb.fil[0]['fxqc']['QI'],
wdg_name='q_input',
label='Input Format <i>Q<sub>X </sub></i>:',
cmb_q=cmb_q)
self.wdg_q_input.sig_tx.connect(self.sig_rx_local)
# Layout and frame for input quantization
layVQiWdg = QVBoxLayout()
layVQiWdg.addWidget(self.wdg_q_input)
layVQiWdg.addWidget(self.wdg_w_input)
frmQiWdg = QFrame(self)
# frmBtns.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)
frmQiWdg.setLayout(layVQiWdg)
frmQiWdg.setContentsMargins(*params['wdg_margins'])
# Layout and frame for output quantization
layVQoWdg = QVBoxLayout()
layVQoWdg.addWidget(self.wdg_q_output)
layVQoWdg.addWidget(self.wdg_w_output)
frmQoWdg = QFrame(self)
# frmBtns.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)
frmQoWdg.setLayout(layVQoWdg)
frmQoWdg.setContentsMargins(*params['wdg_margins'])
# ------------------------------------------------------------------------------
# Dynamically updated image of filter topology (label as placeholder)
# ------------------------------------------------------------------------------
# allow setting background color
# lbl_fixp_img_palette = QPalette()
# lbl_fixp_img_palette.setColor(QPalette(window, Qt: white))
# lbl_fixp_img_palette.setBrush(self.backgroundRole(), QColor(150, 0, 0))
# lbl_fixp_img_palette.setColor(QPalette: WindowText, Qt: blue)
self.lbl_fixp_img = QLabel("img not set", self)
self.lbl_fixp_img.setAutoFillBackground(True)
# self.lbl_fixp_img.setPalette(lbl_fixp_img_palette)
# self.lbl_fixp_img.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
self.embed_fixp_img(self.no_fx_filter_img)
layHImg = QHBoxLayout()
layHImg.setContentsMargins(0, 0, 0, 0)
layHImg.addWidget(self.lbl_fixp_img) # , Qt.AlignCenter)
self.frmImg = QFrame(self)
self.frmImg.setLayout(layHImg)
self.frmImg.setContentsMargins(*params['wdg_margins'])
# ------------------------------------------------------------------------------
# Simulation and export Buttons
# ------------------------------------------------------------------------------
self.butExportHDL = QPushButton(self)
self.butExportHDL.setToolTip(
"Create Verilog or VHDL netlist for fixpoint filter.")
self.butExportHDL.setText("Create HDL")
self.butSimFx = QPushButton(self)
self.butSimFx.setToolTip("Start fixpoint simulation.")
self.butSimFx.setText("Sim. FX")
self.layHHdlBtns = QHBoxLayout()
self.layHHdlBtns.addWidget(self.butSimFx)
self.layHHdlBtns.addWidget(self.butExportHDL)
# This frame encompasses the HDL buttons sim and convert
frmHdlBtns = QFrame(self)
# frmBtns.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)
frmHdlBtns.setLayout(self.layHHdlBtns)
frmHdlBtns.setContentsMargins(*params['wdg_margins'])
# -------------------------------------------------------------------
# Top level layout
# -------------------------------------------------------------------
splitter = QSplitter(self)
splitter.setOrientation(Qt.Vertical)
splitter.addWidget(frmHDL_wdg)
splitter.addWidget(frmQoWdg)
splitter.addWidget(self.frmImg)
# setSizes uses absolute pixel values, but can be "misused" by specifying values
# that are way too large: in this case, the space is distributed according
# to the _ratio_ of the values:
splitter.setSizes([3000, 3000, 5000])
layVMain = QVBoxLayout()
layVMain.addWidget(self.frmTitle)
layVMain.addWidget(frmHdlBtns)
layVMain.addWidget(frmQiWdg)
layVMain.addWidget(splitter)
layVMain.addStretch()
layVMain.setContentsMargins(*params['wdg_margins'])
self.setLayout(layVMain)
# ----------------------------------------------------------------------
# GLOBAL SIGNALS & SLOTs
# ----------------------------------------------------------------------
self.sig_rx.connect(self.process_sig_rx)
self.sig_rx_local.connect(self.process_sig_rx_local)
# dynamic connection in `self._update_fixp_widget()`:
# -----
# if hasattr(self.fx_filt_ui, "sig_rx"):
# self.sig_rx.connect(self.fx_filt_ui.sig_rx)
# if hasattr(self.fx_filt_ui, "sig_tx"):
# self.fx_filt_ui.sig_tx.connect(self.sig_rx_local)
# ----
# ----------------------------------------------------------------------
# LOCAL SIGNALS & SLOTs
# ----------------------------------------------------------------------
self.cmb_fx_wdg.currentIndexChanged.connect(self._update_fixp_widget)
self.butExportHDL.clicked.connect(self.exportHDL)
self.butSimFx.clicked.connect(lambda x: self.emit({'fx_sim': 'start'}))
# ----------------------------------------------------------------------
# EVENT FILTER
# ----------------------------------------------------------------------
# # monitor events and generate sig_resize event when resized
# self.lbl_fixp_img.installEventFilter(self)
# # ... then redraw image when resized
# self.sig_resize.connect(self.resize_img)
# ------------------------------------------------------------------------------
def _update_filter_cmb(self) -> str:
"""
(Re-)Read list of available fixpoint filters for a given filter design
every time a new filter design is selected.
Then try to import the fixpoint designs in the list and populate the
fixpoint implementation combo box `self.cmb_fx_wdg` when successfull.
Returns
-------
inst_wdg_str: str
string with all fixpoint widgets that could be instantiated successfully
"""
inst_wdg_str = "" # full names of successfully instantiated widgets for logging
# remember last fx widget setting:
last_fx_wdg = qget_cmb_box(self.cmb_fx_wdg, data=False)
self.cmb_fx_wdg.clear()
fc = fb.fil[0]['fc']
if 'fix' in fb.filter_classes[fc]:
self.cmb_fx_wdg.blockSignals(True)
for class_name in fb.filter_classes[fc]['fix']: # get class name
try: # construct module + class name ...
mod_class_name = fb.fixpoint_classes[class_name]['mod'] + '.'\
+ class_name
# ... and display name
disp_name = fb.fixpoint_classes[class_name]['name']
self.cmb_fx_wdg.addItem(disp_name, mod_class_name)
inst_wdg_str += '\t' + class_name + ' : ' + mod_class_name + '\n'
except AttributeError as e:
logger.warning('Widget "{0}":\n{1}'.format(class_name, e))
self.embed_fixp_img(self.no_fx_filter_img)
continue # with next `class_name` of for loop
except KeyError as e:
logger.warning("No fixpoint filter for filter type {0} available."
.format(e))
self.embed_fixp_img(self.no_fx_filter_img)
continue # with next `class_name` of for loop
# restore last fx widget if possible
idx = self.cmb_fx_wdg.findText(last_fx_wdg)
# set to idx 0 if not found (returned -1)
self.cmb_fx_wdg.setCurrentIndex(max(idx, 0))
self.cmb_fx_wdg.blockSignals(False)
else: # no fixpoint widget
self.embed_fixp_img(self.no_fx_filter_img)
self._update_fixp_widget()
return inst_wdg_str
# # ------------------------------------------------------------------------------
# def eventFilter(self, source, event):
# """
# Filter all events generated by monitored QLabel, only resize events are
# processed here, generating a `sig_resize` signal. All other events
# are passed on to the next hierarchy level.
# """
# if event.type() == QEvent.Resize:
# logger.warning("resize event!")
# self.sig_resize.emit()
# # Call base class method to continue normal event processing:
# return super(Input_Fixpoint_Specs, self).eventFilter(source, event)
# ------------------------------------------------------------------------------
def embed_fixp_img(self, img_file: str) -> QPixmap:
"""
Embed `img_file` in png format as `self.img_fixp`
Parameters
----------
img_file: str
path and file name to image file
Returns
-------
self.img_fixp: QPixmap object
pixmap containing the passed img_file
"""
if not os.path.isfile(img_file):
logger.warning("Image file {0} doesn't exist.".format(img_file))
img_file = self.default_fx_img
_, file_extension = os.path.splitext(img_file)
if file_extension != '.png':
logger.error('Unknown file extension "{0}"!'.format(file_extension))
img_file = self.default_fx_img
self.img_fixp = QPixmap(img_file)
# logger.warning(f"img_fixp = {img_file}")
# logger.warning(f"_embed_fixp_img(): {self.img_fixp.__class__.__name__}")
return self.img_fixp
# ------------------------------------------------------------------------------
def resize_img(self) -> None:
"""
Triggered when `self` (the widget) is selected or resized. The method resizes
the image inside QLabel to completely fill the label while keeping
the aspect ratio. An offset of some pixels is needed, otherwise the image
is clipped.
"""
# logger.warning(f"resize_img(): img_fixp = {self.img_fixp.__class__.__name__}")
if self.parent is None: # parent is QApplication, has no width or height
par_w, par_h = 300, 700 # fixed size for module level test
else: # widget parent is InputTabWidget()
par_w, par_h = self.parent.width(), self.parent.height()
img_w, img_h = self.img_fixp.width(), self.img_fixp.height()
if img_w > 10:
max_h = int(max(np.floor(img_h * par_w/img_w) - 5, 20))
else:
max_h = 200
logger.debug("img size: {0},{1}, frm size: {2},{3}, max_h: {4}"
.format(img_w, img_h, par_w, par_h, max_h))
# The following doesn't work because the width of the parent widget can grow
# with the image size
# img_scaled = self.img_fixp.scaled(self.lbl_fixp_img.size(),
# Qt.KeepAspectRatio, Qt.SmoothTransformation)
img_scaled = self.img_fixp.scaledToHeight(max_h, Qt.SmoothTransformation)
self.lbl_fixp_img.setPixmap(img_scaled)
# ------------------------------------------------------------------------------
def _update_fixp_widget(self):
"""
This method is called at the initialization of the widget and when
a new fixpoint filter implementation is selected from the combo box:
- Destruct old instance of fixpoint filter widget `self.fx_filt_ui`
- Import and instantiate new fixpoint filter widget e.g. after changing the
filter topology as
- Try to load image for filter topology
- Update the UI of the widget
- Try to instantiate HDL filter as `self.fx_filt_ui.fixp_filter` with
dummy data
- emit {'fx_sim': 'specs_changed'} when successful
"""
def _disable_fx_wdg(self) -> None:
if hasattr(self, "fx_filt_ui") and self.fx_filt_ui is not None:
# is a fixpoint widget loaded?
try:
# try to remove widget from layout
self.layH_fx_wdg.removeWidget(self.fx_filt_ui)
# delete QWidget when scope has been left
self.fx_filt_ui.deleteLater()
except AttributeError as e:
logger.error("Destructing UI failed!\n{0}".format(e))
self.fx_wdg_found = False
self.butSimFx.setEnabled(False)
self.butExportHDL.setVisible(False)
# self.layH_fx_wdg.setVisible(False)
self.img_fixp = self.embed_fixp_img(self.no_fx_filter_img)
self.resize_img()
self.lblTitle.setText("")
self.fx_filt_ui = None
# -----------------------------------------------------------
_disable_fx_wdg(self) # destruct old fixpoint widget instance:
# instantiate new fixpoint widget class as self.fx_filt_ui
cmb_wdg_fx_cur = qget_cmb_box(self.cmb_fx_wdg, data=False)
if cmb_wdg_fx_cur: # at least one valid fixpoint widget found
self.fx_wdg_found = True
# get list [module name and path, class name]
fx_mod_class_name = qget_cmb_box(self.cmb_fx_wdg, data=True).rsplit('.', 1)
fx_mod = importlib.import_module(fx_mod_class_name[0]) # get module
fx_filt_ui_class = getattr(fx_mod, fx_mod_class_name[1]) # get class
logger.info("Instantiating new FX widget\n\t"
f"{fx_mod.__name__}.{fx_filt_ui_class.__name__}")
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
self.fx_filt_ui = fx_filt_ui_class() # instantiate the fixpoint widget
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# and add it to layout:
self.layH_fx_wdg.addWidget(self.fx_filt_ui, stretch=1)
self.fx_filt_ui.setVisible(True)
self.wdg_dict2ui() # initialize the fixpoint subwidgets from the fxqc_dict
# ---- connect signals to fx_filt_ui ----
if hasattr(self.fx_filt_ui, "sig_rx"):
self.sig_rx.connect(self.fx_filt_ui.sig_rx)
if hasattr(self.fx_filt_ui, "sig_tx"):
self.fx_filt_ui.sig_tx.connect(self.sig_rx_local)
# ---- get name of new fixpoint filter image ----
if not (hasattr(self.fx_filt_ui, "img_name") and self.fx_filt_ui.img_name):
# no image name defined, use default image
img_file = self.default_fx_img
else:
# get path of imported fixpoint widget ...
file_path = os.path.dirname(fx_mod.__file__)
# ... and construct full image name from it
img_file = os.path.join(file_path, self.fx_filt_ui.img_name)
# ---- instantiate and scale graphic of filter topology ----
self.embed_fixp_img(img_file)
self.resize_img()
# ---- set title and description for filter
self.lblTitle.setText(self.fx_filt_ui.title)
# Check which methods the fixpoint widget provides and enable
# corresponding buttons:
self.butExportHDL.setVisible(hasattr(self.fx_filt_ui, "to_hdl"))
self.butSimFx.setEnabled(hasattr(self.fx_filt_ui, "fxfilter"))
self.update_fxqc_dict()
self.emit({'fx_sim': 'specs_changed'})
# ------------------------------------------------------------------------------
def wdg_dict2ui(self):
"""
Trigger an update of the fixpoint widget UI when view (i.e. fixpoint
coefficient format) or data have been changed outside this class. Additionally,
pass the fixpoint quantization widget to update / restore other subwidget
settings.
Set the RUN button to "changed".
"""
# fb.fil[0]['fxqc']['QCB'].update({'scale':(1 << fb.fil[0]['fxqc']['QCB']['W'])})
self.wdg_q_input.dict2ui(fb.fil[0]['fxqc']['QI'])
self.wdg_q_output.dict2ui(fb.fil[0]['fxqc']['QO'])
self.wdg_w_input.dict2ui(fb.fil[0]['fxqc']['QI'])
self.wdg_w_output.dict2ui(fb.fil[0]['fxqc']['QO'])
if self.fx_wdg_found and hasattr(self.fx_filt_ui, "dict2ui"):
self.fx_filt_ui.dict2ui()
# dict_sig = {'fx_sim':'specs_changed'}
# self.emit(dict_sig)
qstyle_widget(self.butSimFx, "changed")
# ------------------------------------------------------------------------------
def update_fxqc_dict(self):
"""
Update the fxqc dictionary before simulation / HDL generation starts.
"""
if self.fx_wdg_found:
# get a dict with the coefficients and fixpoint settings from fixpoint widget
if hasattr(self.fx_filt_ui, "ui2dict"):
fb.fil[0]['fxqc'].update(self.fx_filt_ui.ui2dict())
logger.debug("update fxqc: \n{0}".format(pprint_log(fb.fil[0]['fxqc'])))
else:
logger.error("No fixpoint widget found!")
# ------------------------------------------------------------------------------
def exportHDL(self):
"""
Synthesize HDL description of filter
"""
dlg = QFD(self) # instantiate file dialog object
file_types = "Verilog (*.v)"
# needed for overwrite confirmation when name is entered without suffix:
dlg.setDefaultSuffix('v')
dlg.setWindowTitle('Export Verilog')
dlg.setNameFilter(file_types)
dlg.setDirectory(dirs.save_dir)
# set mode "save file" instead "open file":
dlg.setAcceptMode(QFD.AcceptSave)
dlg.setOption(QFD.DontConfirmOverwrite, False)
if dlg.exec_() == QFD.Accepted:
hdl_file = qstr(dlg.selectedFiles()[0])
# hdl_type = extract_file_ext(qstr(dlg.selectedNameFilter()))[0]
# =============================================================================
# # static method getSaveFileName_() is simple but unflexible
# hdl_file, hdl_filter = dlg.getSaveFileName_(
# caption="Save Verilog netlist as (this also defines the module name)",
# directory=dirs.save_dir, filter=file_types)
# hdl_file = qstr(hdl_file)
# if hdl_file != "": # "operation cancelled" returns an empty string
# # return '.v' or '.vhd' depending on filetype selection:
# # hdl_type = extract_file_ext(qstr(hdl_filter))[0]
# # sanitized dir + filename + suffix. The filename suffix is replaced
# # by `v` later.
# hdl_file = os.path.normpath(hdl_file) # complete path + file name
# =============================================================================
hdl_dir_name = os.path.dirname(hdl_file) # extract the directory path
if not os.path.isdir(hdl_dir_name): # create directory if it doesn't exist
os.mkdir(hdl_dir_name)
dirs.save_dir = hdl_dir_name # make this directory the new default / base dir
hdl_file_name = os.path.splitext(os.path.basename(hdl_file))[0]
hdl_full_name = os.path.join(hdl_dir_name, hdl_file_name + ".v")
# remove all non-alphanumeric chars:
vlog_mod_name = re.sub(r'\W+', '', hdl_file_name).lower()
logger.info('Creating hdl_file "{0}"\n\twith top level module "{1}"'
.format(hdl_full_name, vlog_mod_name))
try:
self.update_fxqc_dict()
self.fx_filt_ui.construct_fixp_filter()
code = self.fx_filt_ui.to_hdl(name=vlog_mod_name)
# logger.info(str(code)) # print verilog code to console
with io.open(hdl_full_name, 'w', encoding="utf8") as f:
f.write(str(code))
logger.info("HDL conversion finished!")
except (IOError, TypeError) as e:
logger.warning(e)
# --------------------------------------------------------------------------
def fx_sim_init(self):
"""
Initialize fix-point simulation:
- Update the `fxqc_dict` containing all quantization information
- Setup a filter instance for fixpoint simulation
- Request a stimulus signal
Returns
-------
error: int
0 for sucessful fx widget construction, -1 for error
"""
try:
self.update_fxqc_dict()
self.fx_filt_ui.init_filter() # setup filter instance
return 0
except ValueError as e:
logger.error('Fixpoint stimulus generation failed during "init"'
'\nwith "{0} "'.format(e))
return -1
# ------------------------------------------------------------------------------
def fx_sim_calc_response(self, dict_sig) -> None:
"""
- Read fixpoint stimulus from `dict_sig` in integer format
- Pass it to the fixpoint filter which calculates the fixpoint response
- Store the result in `fb.fx_results` and return. In case of an error,
`fb.fx_results == None`
Returns
-------
None
"""
try:
# logger.info(
# 'Simulate fixpoint frame with "{0}" stimulus:\n\t{1}'.format(
# dict_sig['class'],
# pprint_log(dict_sig['fx_stimulus'], tab=" "),
# ))
# Run fixpoint simulation and store the results as integer values:
fb.fx_results = self.fx_filt_ui.fxfilter(dict_sig['fx_stimulus'])
if len(fb.fx_results) == 0:
logger.error("Fixpoint simulation returned empty results!")
# else:
# # logger.debug("fx_results: {0}"\
# # .format(pprint_log(fb.fx_results, tab= " ")))
# logger.info(
# f'Fixpoint simulation successful for dict\n{pprint_log(dict_sig)}'
# f'\tStimuli: Shape {np.shape(dict_sig["fx_stimulus"])}'
# f' of type "{dict_sig["fx_stimulus"].dtype}"'
# f'\n\tResponse: Shape {np.shape(fb.fx_results)}'
# f' of type "{type(fb.fx_results).__name__} "'
# f' ("{type(fb.fx_results[0]).__name__}")'
# )
except ValueError as e:
logger.error("Simulator error {0}".format(e))
fb.fx_results = None
except AssertionError as e:
logger.error('Fixpoint simulation failed for dict\n{0}'
'\twith msg. "{1}"\n\tStimuli: Shape {2} of type "{3}"'
'\n\tResponse: Shape {4} of type "{5}"'.format(
pprint_log(dict_sig), e,
np.shape(dict_sig['fx_stimulus']),
dict_sig['fx_stimulus'].dtype,
np.shape(fb.fx_results),
type(fb.fx_results)
))
fb.fx_results = None
if fb.fx_results is None:
qstyle_widget(self.butSimFx, "error")
else:
pass # everything ok, return
# logger.debug("Sending fixpoint results")
return
class SelectFilter(QWidget):
"""
Construct and read combo boxes for selecting the filter, consisting of the
following hierarchy:
1. Response Type rt (LP, HP, Hilbert, ...)
2. Filter Type ft (IIR, FIR, CIC ...)
3. Filter Class (Butterworth, ...)
Every time a combo box is changed manually, the filter tree for the selected
response resp. filter type is read and the combo box(es) further down in
the hierarchy are populated according to the available combinations.
sig_tx({'filt_changed'}) is emitted and propagated to input_filter_specs.py
where it triggers the recreation of all subwidgets.
"""
sig_tx = pyqtSignal(object) # outgoing
from pyfda.libs.pyfda_qt_lib import emit
def __init__(self, parent=None):
super(SelectFilter, self).__init__(parent)
self.fc_last = '' # previous filter class
self._construct_UI()
self._set_response_type() # first time initialization
def _construct_UI(self):
"""
Construct UI with comboboxes for selecting filter:
- cmbResponseType for selecting response type rt (LP, HP, ...)
- cmbFilterType for selection of filter type (IIR, FIR, ...)
- cmbFilterClass for selection of design design class (Chebyshev, ...)
and populate them from the "filterTree" dict during the initial run.
Later, calling _set_response_type() updates the three combo boxes.
See filterbroker.py for structure and content of "filterTree" dict
"""
# ----------------------------------------------------------------------
# Combo boxes for filter selection
# ----------------------------------------------------------------------
self.cmbResponseType = QComboBox(self)
self.cmbResponseType.setObjectName("comboResponseType")
self.cmbResponseType.setToolTip("Select filter response type.")
self.cmbFilterType = QComboBox(self)
self.cmbFilterType.setObjectName("comboFilterType")
self.cmbFilterType.setToolTip(
"<span>Choose filter type, either recursive (Infinite Impulse Response) "
"or transversal (Finite Impulse Response).</span>")
self.cmbFilterClass = QComboBox(self)
self.cmbFilterClass.setObjectName("comboFilterClass")
self.cmbFilterClass.setToolTip("Select the filter design class.")
# Adapt comboboxes size dynamically to largest element
self.cmbResponseType.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.cmbFilterType.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.cmbFilterClass.setSizeAdjustPolicy(QComboBox.AdjustToContents)
# ----------------------------------------------------------------------
# Populate combo box with initial settings from fb.fil_tree
# ----------------------------------------------------------------------
# Translate short response type ("LP") to displayed names ("Lowpass")
# (correspondence is defined in pyfda_rc.py) and populate rt combo box
#
rt_list = sorted(list(fb.fil_tree.keys()))
for rt in rt_list:
try:
self.cmbResponseType.addItem(rc.rt_names[rt], rt)
except KeyError as e:
logger.warning(
f"KeyError: {e} has no corresponding full name in rc.rt_names."
)
idx = self.cmbResponseType.findData('LP') # find index for 'LP'
if idx == -1: # Key 'LP' does not exist, use first entry instead
idx = 0
self.cmbResponseType.setCurrentIndex(idx) # set initial index
rt = qget_cmb_box(self.cmbResponseType)
for ft in fb.fil_tree[rt]:
self.cmbFilterType.addItem(rc.ft_names[ft], ft)
self.cmbFilterType.setCurrentIndex(0) # set initial index
ft = qget_cmb_box(self.cmbFilterType)
for fc in fb.fil_tree[rt][ft]:
self.cmbFilterClass.addItem(fb.filter_classes[fc]['name'], fc)
self.cmbFilterClass.setCurrentIndex(0) # set initial index
# ----------------------------------------------------------------------
# Layout for Filter Type Subwidgets
# ----------------------------------------------------------------------
layHFilWdg = QHBoxLayout() # container for filter subwidgets
layHFilWdg.addWidget(self.cmbResponseType) # LP, HP, BP, etc.
layHFilWdg.addStretch()
layHFilWdg.addWidget(self.cmbFilterType) # FIR, IIR
layHFilWdg.addStretch()
layHFilWdg.addWidget(self.cmbFilterClass) # bessel, elliptic, etc.
# ----------------------------------------------------------------------
# Layout for dynamic filter subwidgets (empty frame)
# ----------------------------------------------------------------------
# see Summerfield p. 278
self.layHDynWdg = QHBoxLayout() # for additional dynamic subwidgets
# ----------------------------------------------------------------------
# Filter Order Subwidgets
# ----------------------------------------------------------------------
self.lblOrder = QLabel("<b>Order:</b>")
self.chkMinOrder = QCheckBox("Minimum", self)
self.chkMinOrder.setToolTip(
"<span>Minimum filter order / # of taps is determined automatically.</span>"
)
self.lblOrderN = QLabel("<b><i>N =</i></b>")
self.ledOrderN = QLineEdit(str(fb.fil[0]['N']), self)
self.ledOrderN.setToolTip("Filter order (# of taps - 1).")
# --------------------------------------------------
# Layout for filter order subwidgets
# --------------------------------------------------
layHOrdWdg = QHBoxLayout()
layHOrdWdg.addWidget(self.lblOrder)
layHOrdWdg.addWidget(self.chkMinOrder)
layHOrdWdg.addStretch()
layHOrdWdg.addWidget(self.lblOrderN)
layHOrdWdg.addWidget(self.ledOrderN)
# ----------------------------------------------------------------------
# OVERALL LAYOUT (stack standard + dynamic subwidgets vertically)
# ----------------------------------------------------------------------
self.layVAllWdg = QVBoxLayout()
self.layVAllWdg.addLayout(layHFilWdg)
self.layVAllWdg.addLayout(self.layHDynWdg)
self.layVAllWdg.addLayout(layHOrdWdg)
# ==============================================================================
frmMain = QFrame(self)
frmMain.setLayout(self.layVAllWdg)
layHMain = QHBoxLayout()
layHMain.addWidget(frmMain)
layHMain.setContentsMargins(*rc.params['wdg_margins'])
self.setLayout(layHMain)
# ==============================================================================
# ------------------------------------------------------------
# SIGNALS & SLOTS
# ------------------------------------------------------------
# Connect comboBoxes and setters, propgate change events hierarchically
# through all widget methods and emit 'filt_changed' in the end.
self.cmbResponseType.currentIndexChanged.connect(
lambda: self._set_response_type(enb_signal=True)) # 'LP'
self.cmbFilterType.currentIndexChanged.connect(
lambda: self._set_filter_type(enb_signal=True)) # 'IIR'
self.cmbFilterClass.currentIndexChanged.connect(
lambda: self._set_design_method(enb_signal=True)) # 'cheby1'
self.chkMinOrder.clicked.connect(
lambda: self._set_filter_order(enb_signal=True)) # Min. Order
self.ledOrderN.editingFinished.connect(
lambda: self._set_filter_order(enb_signal=True)) # Manual Order
# ------------------------------------------------------------
# ------------------------------------------------------------------------------
def load_dict(self):
"""
Reload comboboxes from filter dictionary to update changed settings
after loading a filter design from disk.
`load_dict` uses the automatism of _set_response_type etc.
of checking whether the previously selected filter design method is
also available for the new combination.
"""
# find index for response type:
rt_idx = self.cmbResponseType.findData(fb.fil[0]['rt'])
self.cmbResponseType.setCurrentIndex(rt_idx)
self._set_response_type()
# ------------------------------------------------------------------------------
def _set_response_type(self, enb_signal=False):
"""
Triggered when cmbResponseType (LP, HP, ...) is changed:
Copy selection to self.rt and fb.fil[0] and reconstruct filter type combo
If previous filter type (FIR, IIR, ...) exists for new rt, set the
filter type combo box to the old setting
"""
# Read current setting of comboBox as string and store it in the filter dict
fb.fil[0]['rt'] = self.rt = qget_cmb_box(self.cmbResponseType)
# Get list of available filter types for new rt
ft_list = list(
fb.fil_tree[self.rt].keys()) # explicit list() needed for Py3
# ---------------------------------------------------------------
# Rebuild filter type combobox entries for new rt setting
self.cmbFilterType.blockSignals(
True) # don't fire when changed programmatically
self.cmbFilterType.clear()
for ft in fb.fil_tree[self.rt]:
self.cmbFilterType.addItem(rc.ft_names[ft], ft)
# Is current filter type (e.g. IIR) in list for new rt?
if fb.fil[0]['ft'] in ft_list:
ft_idx = self.cmbFilterType.findText(fb.fil[0]['ft'])
self.cmbFilterType.setCurrentIndex(
ft_idx) # yes, set same ft as before
else:
self.cmbFilterType.setCurrentIndex(0) # no, set index 0
self.cmbFilterType.blockSignals(False)
# ---------------------------------------------------------------
self._set_filter_type(enb_signal)
# ------------------------------------------------------------------------------
def _set_filter_type(self, enb_signal=False):
""""
Triggered when cmbFilterType (IIR, FIR, ...) is changed:
- read filter type ft and copy it to fb.fil[0]['ft'] and self.ft
- (re)construct design method combo, adding
displayed text (e.g. "Chebyshev 1") and hidden data (e.g. "cheby1")
"""
# Read out current setting of comboBox and convert to string
fb.fil[0]['ft'] = self.ft = qget_cmb_box(self.cmbFilterType)
#
logger.debug("InputFilter.set_filter_type triggered: {0}".format(
self.ft))
# ---------------------------------------------------------------
# Get all available design methods for new ft from fil_tree and
# - Collect them in fc_list
# - Rebuild design method combobox entries for new ft setting:
# The combobox is populated with the "long name",
# the internal name is stored in comboBox.itemData
self.cmbFilterClass.blockSignals(True)
self.cmbFilterClass.clear()
fc_list = []
for fc in sorted(fb.fil_tree[self.rt][self.ft]):
self.cmbFilterClass.addItem(fb.filter_classes[fc]['name'], fc)
fc_list.append(fc)
logger.debug("fc_list: {0}\n{1}".format(fc_list, fb.fil[0]['fc']))
# Does new ft also provide the previous design method (e.g. ellip)?
# Has filter been instantiated?
if fb.fil[0]['fc'] in fc_list and ff.fil_inst:
# yes, set same fc as before
fc_idx = self.cmbFilterClass.findText(
fb.filter_classes[fb.fil[0]['fc']]['name'])
logger.debug("fc_idx : %s", fc_idx)
self.cmbFilterClass.setCurrentIndex(fc_idx)
else:
self.cmbFilterClass.setCurrentIndex(0) # no, set index 0
self.cmbFilterClass.blockSignals(False)
self._set_design_method(enb_signal)
# ------------------------------------------------------------------------------
def _set_design_method(self, enb_signal=False):
"""
Triggered when cmbFilterClass (cheby1, ...) is changed:
- read design method fc and copy it to fb.fil[0]
- create / update global filter instance fb.fil_inst of fc class
- update dynamic widgets (if fc has changed and if there are any)
- call load filter order
"""
fb.fil[0]['fc'] = fc = qget_cmb_box(self.cmbFilterClass)
if fc != self.fc_last: # fc has changed:
# when filter has been changed, try to destroy dynamic widgets of last fc:
if self.fc_last:
self._destruct_dyn_widgets()
# ==================================================================
"""
Create new instance of the selected filter class, accessible via
its handle fb.fil_inst
"""
err = ff.fil_factory.create_fil_inst(fc)
logger.debug(f"InputFilter.set_design_method triggered: {fc}\n"
f"Returned error code {err}")
# ==================================================================
# Check whether new design method also provides the old filter order
# method. If yes, don't change it, else set first available
# filter order method
if fb.fil[0]['fo'] not in fb.fil_tree[self.rt][self.ft][fc].keys():
fb.fil[0].update({'fo': {}})
# explicit list(dict.keys()) needed for Python 3
fb.fil[0]['fo'] = list(
fb.fil_tree[self.rt][self.ft][fc].keys())[0]
# =============================================================================
# logger.debug("selFilter = %s"
# "filterTree[fc] = %s"
# "filterTree[fc].keys() = %s"
# %(fb.fil[0], fb.fil_tree[self.rt][self.ft][fc],\
# fb.fil_tree[self.rt][self.ft][fc].keys()
# ))
#
# =============================================================================
# construct dyn. subwidgets if available
if hasattr(ff.fil_inst, 'construct_UI'):
self._construct_dyn_widgets()
self.fc_last = fb.fil[0]['fc']
self.load_filter_order(enb_signal)
# ------------------------------------------------------------------------------
def load_filter_order(self, enb_signal=False):
"""
Called by set_design_method or from InputSpecs (with enb_signal = False),
load filter order setting from fb.fil[0] and update widgets
"""
# collect dict_keys of available filter order [fo] methods for selected
# design method [fc] from fil_tree (explicit list() needed for Python 3)
fo_dict = fb.fil_tree[fb.fil[0]['rt']][fb.fil[0]['ft']][fb.fil[0]
['fc']]
fo_list = list(fo_dict.keys())
# is currently selected fo setting available for (new) fc ?
if fb.fil[0]['fo'] in fo_list:
self.fo = fb.fil[0]['fo'] # keep current setting
else:
self.fo = fo_list[0] # use first list entry from filterTree
fb.fil[0]['fo'] = self.fo # and update fo method
# check whether fo widget is active, disabled or invisible
if 'fo' in fo_dict[self.fo] and len(fo_dict[self.fo]['fo']) > 1:
status = fo_dict[self.fo]['fo'][0]
else:
status = 'i'
# Determine which subwidgets are __visible__
self.chkMinOrder.setVisible('min' in fo_list)
self.ledOrderN.setVisible(status in {'a', 'd'})
self.lblOrderN.setVisible(status in {'a', 'd'})
# Determine which subwidgets are __enabled__
self.chkMinOrder.setChecked(fb.fil[0]['fo'] == 'min')
self.ledOrderN.setText(str(fb.fil[0]['N']))
self.ledOrderN.setEnabled(not self.chkMinOrder.isChecked()
and status == 'a')
self.lblOrderN.setEnabled(not self.chkMinOrder.isChecked()
and status == 'a')
if enb_signal:
logger.debug("Emit 'filt_changed'")
self.emit({'filt_changed': 'filter_type'})
# ------------------------------------------------------------------------------
def _set_filter_order(self, enb_signal=False):
"""
Triggered when either ledOrderN or chkMinOrder are edited:
- copy settings to fb.fil[0]
- emit 'filt_changed' if enb_signal is True
"""
# Determine which subwidgets are _enabled_
if self.chkMinOrder.isVisible():
self.ledOrderN.setEnabled(not self.chkMinOrder.isChecked())
self.lblOrderN.setEnabled(not self.chkMinOrder.isChecked())
if self.chkMinOrder.isChecked() is True:
# update in case N has been changed outside this class
self.ledOrderN.setText(str(fb.fil[0]['N']))
fb.fil[0].update({'fo': 'min'})
else:
fb.fil[0].update({'fo': 'man'})
else:
self.lblOrderN.setEnabled(self.fo == 'man')
self.ledOrderN.setEnabled(self.fo == 'man')
# read manual filter order, convert to positive integer and store it
# in filter dictionary.
ordn = safe_eval(self.ledOrderN.text(),
fb.fil[0]['N'],
return_type='int',
sign='pos')
ordn = ordn if ordn > 0 else 1
self.ledOrderN.setText(str(ordn))
fb.fil[0].update({'N': ordn})
if enb_signal:
logger.debug("Emit 'filt_changed'")
self.emit({'filt_changed': 'filter_order_widget'})
# ------------------------------------------------------------------------------
def _destruct_dyn_widgets(self):
"""
Delete the dynamically created filter design subwidget (if there is one)
see http://stackoverflow.com/questions/13827798/proper-way-to-cleanup-
widgets-in-pyqt
This does NOT work when the subwidgets to be deleted and created are
identical, as the deletion is only performed when the current scope has
been left (?)! Hence, it is necessary to skip this method when the new
design method is the same as the old one.
"""
if hasattr(ff.fil_inst, 'wdg_fil'):
# not needed, connection is destroyed automatically
# ff.fil_inst.sig_tx.disconnect()
try:
# remove widget from layout
self.layHDynWdg.removeWidget(self.dyn_wdg_fil)
# delete UI widget when scope has been left
self.dyn_wdg_fil.deleteLater()
except AttributeError as e:
logger.error("Could not destruct_UI!\n{0}".format(e))
ff.fil_inst.deleteLater(
) # delete QWidget when scope has been left
# ------------------------------------------------------------------------------
def _construct_dyn_widgets(self):
"""
Create filter widget UI dynamically (if the filter routine has one) and
connect its sig_tx signal to sig_tx in this scope.
"""
ff.fil_inst.construct_UI()
if hasattr(ff.fil_inst, 'wdg_fil'):
try:
self.dyn_wdg_fil = getattr(ff.fil_inst, 'wdg_fil')
self.layHDynWdg.addWidget(self.dyn_wdg_fil, stretch=1)
except AttributeError as e:
logger.warning(e)
if hasattr(ff.fil_inst, 'sig_tx'):
ff.fil_inst.sig_tx.connect(self.sig_tx)
