def _save_dict(self):
"""
Save the coefficient register `self.ba` to the filter dict `fb.fil[0]['ba']`.
"""
logger.debug("_save_dict called")
fb.fil[0]['N'] = max(len(self.ba[0]), len(self.ba[1])) - 1
self.ui2qdict()
if fb.fil[0]['ft'] == 'IIR':
fb.fil[0]['fc'] = 'Manual_IIR'
else:
fb.fil[0]['fc'] = 'Manual_FIR'
# save, check and convert coeffs, check filter type
fil_save(fb.fil[0], self.ba, 'ba', __name__)
if __name__ == '__main__':
self.load_dict() # only needed for stand-alone test
self.sig_tx.emit({'sender': __name__, 'data_changed': 'input_coeffs'})
# -> input_tab_widgets
qstyle_widget(self.ui.butSave, 'normal')
def update_UI(self, new_labels=()):
"""
Called from filter_specs.update_UI() and target_specs.update_UI()
Set labels and get corresponding values from filter dictionary.
When number of entries has changed, the layout of subwidget is rebuilt,
using
- `self.qlabels`, a list with references to existing QLabel widgets,
- `new_labels`, a list of strings from the filter_dict for the current
filter design
- 'num_new_labels`, their number
- `self.n_cur_labels`, the number of currently visible labels / qlineedit
fields
"""
self.update_f_unit()
state = new_labels[0]
new_labels = new_labels[1:]
num_new_labels = len(new_labels)
# hide / show labels / create new subwidgets if neccessary:
self._show_entries(num_new_labels)
# W_lbl = max([self.qfm.width(l) for l in new_labels]) # max. label width in pixel
# ---------------------------- logging -----------------------------
logger.debug("update_UI: {0}-{1}-{2}".format(fb.fil[0]['rt'],
fb.fil[0]['fc'],
fb.fil[0]['fo']))
f_range = " (0 < <i>f</i> < <i>f<sub>S </sub></i>/2)"
for i in range(num_new_labels):
# Update ALL labels and corresponding values
if fb.fil[0]['freq_specs_unit'] in {"f_S", "f_Ny"}:
self.qlabels[i].setText(to_html(new_labels[i], frmt='bi'))
else: # convert 'F' to 'f' for frequencies in Hz
self.qlabels[i].setText(
to_html(new_labels[i][0].lower() + new_labels[i][1:],
frmt='bi'))
self.qlineedit[i].setText(str(fb.fil[0][new_labels[i]]))
self.qlineedit[i].setObjectName(new_labels[i]) # update ID
qstyle_widget(self.qlineedit[i], state)
if "sb" in new_labels[i].lower():
self.qlineedit[i].setToolTip(
"<span>Corner frequency for (this) stop band" + f_range +
".</span>")
elif "pb" in new_labels[i].lower():
self.qlineedit[i].setToolTip(
"<span>Corner frequency for (this) pass band" + f_range +
".</span>")
else:
self.qlineedit[i].setToolTip(
"<span>Corner frequency for (this) band" + f_range +
".</span>")
self.n_cur_labels = num_new_labels # update number of currently visible labels
self.sort_dict_freqs(
) # sort frequency entries in dictionary and update display
def _copy_to_table(self):
"""
Read data from clipboard / file and copy it to `self.ba` as float / cmplx
# TODO: More checks for swapped row <-> col, single values, wrong data type ...
"""
data_str = qtext2table(
self, 'ba',
title="Import Filter Coefficients") # returns ndarray of str
if data_str is None: # file operation has been aborted or some other error
return
logger.debug(
"importing data: dim - shape = {0} - {1} - {2}\n{3}".format(
type(data_str), np.ndim(data_str), np.shape(data_str),
data_str))
conv = self.myQ.frmt2float # frmt2float_vec?
frmt = self.myQ.frmt
if np.ndim(data_str) > 1:
num_cols, num_rows = np.shape(data_str)
orientation_horiz = num_cols > num_rows # need to transpose data
elif np.ndim(data_str) == 1:
num_rows = len(data_str)
num_cols = 1
orientation_horiz = False
else:
logger.error("Imported data is a single value or None.")
return None
logger.info("_copy_to_table: c x r = {0} x {1}".format(
num_cols, num_rows))
if orientation_horiz:
self.ba = [[], []]
for c in range(num_cols):
self.ba[0].append(conv(data_str[c][0], frmt))
if num_rows > 1:
self.ba[1].append(conv(data_str[c][1], frmt))
if num_rows > 1:
self._filter_type(ftype='IIR')
else:
self._filter_type(ftype='FIR')
else:
self.ba[0] = [conv(s, frmt) for s in data_str[0]]
if num_cols > 1:
self.ba[1] = [conv(s, frmt) for s in data_str[1]]
self._filter_type(ftype='IIR')
else:
self.ba[1] = [1]
self._filter_type(ftype='FIR')
self.ba[0] = np.asarray(self.ba[0])
self.ba[1] = np.asarray(self.ba[1])
self._equalize_ba_length()
qstyle_widget(self.ui.butSave, 'changed')
self._refresh_table()
def _store_gain(self, source):
"""
When the textfield of `source` has been edited (flag `self.spec_edited` = True),
store it in the shadow dict. This is triggered by `QEvent.focusOut` or
RETURN key.
"""
if self.spec_edited:
self.zpk[2] = safe_eval(source.text(), alt_expr=str(self.zpk[2]))
qstyle_widget(self.ui.butSave, 'changed')
self.spec_edited = False # reset flag
def load_dict(self):
"""
Load all entries from filter dict fb.fil[0]['zpk'] into the Zero/Pole/Gain list
self.zpk and update the display via `self._refresh_table()`.
The explicit np.array( ... ) statement enforces a deep copy of fb.fil[0],
otherwise the filter dict would be modified inadvertedly. `dtype=object`
needs to be specified to create a numpy array from the nested lists with
differing lengths without creating the deprecation warning
"Creating an ndarray from ragged nested sequences (which is a list-or-tuple of
lists-or-tuples-or ndarrays with different lengths or shapes) is deprecated."
The filter dict fb.fil[0]['zpk'] is a list of numpy float ndarrays for z / p / k values
`self.zpk` is an array of float ndarrays with different lengths of z / p / k subarrays
to allow adding / deleting items.
"""
self.zpk = np.array(fb.fil[0]['zpk'],
dtype=object) # this enforces a deep copy
qstyle_widget(self.ui.butSave, 'normal')
self._refresh_table()
