def __init__(self, ui, statistics_model):
super().__init__(
ui.create_column_widget(properties={
"min-height": 18 * 3,
"max-height": 18 * 3
}))
# create property models for the UI
self._stats1_property = Model.PropertyModel(str())
self._stats2_property = Model.PropertyModel(str())
self.__statistics_model = statistics_model
def statistics_changed(key: str) -> None:
if key == "value":
statistics_data = self.__statistics_model.value
statistic_strings = list()
for key in sorted(statistics_data.keys()):
value = statistics_data[key]
if value is not None:
statistic_str = "{0} {1}".format(key, value)
else:
statistic_str = "{0} {1}".format(key, _("N/A"))
statistic_strings.append(statistic_str)
self._stats1_property.value = "\n".join(
statistic_strings[:(len(statistic_strings) + 1) // 2])
self._stats2_property.value = "\n".join(
statistic_strings[(len(statistic_strings) + 1) // 2:])
self.__statistics_property_changed_event_listener = self.__statistics_model.property_changed_event.listen(
statistics_changed)
statistics_changed("value")
stats_column1 = ui.create_column_widget(properties={
"min-width": 140,
"max-width": 140
})
stats_column2 = ui.create_column_widget(properties={
"min-width": 140,
"max-width": 140
})
stats_column1_label = ui.create_label_widget()
stats_column2_label = ui.create_label_widget()
stats_column1.add(stats_column1_label)
stats_column2.add(stats_column2_label)
stats_section = ui.create_row_widget()
stats_section.add_spacing(13)
stats_section.add(stats_column1)
stats_section.add_stretch()
stats_section.add(stats_column2)
stats_section.add_spacing(13)
stats_column1_label.bind_text(
Binding.PropertyBinding(self._stats1_property, "value"))
stats_column2_label.bind_text(
Binding.PropertyBinding(self._stats2_property, "value"))
self.content_widget.add(stats_section)
def create_combo_box(self, ui):
combo_box = ui.create_combo_box_widget(
self.hardware_sources_model.value,
item_getter=operator.attrgetter("display_name"))
combo_box.bind_items(
Binding.PropertyBinding(self.hardware_sources_model, "value"))
combo_box.bind_current_index(
Binding.PropertyBinding(self.hardware_source_index_model, "value"))
return combo_box
def connect_camera_hardware_source(self, camera_hardware_source):
self.__exposure_time_ms_value_model = Model.PropertyModel()
def update_exposure_time_ms(exposure_time_ms):
if exposure_time_ms > 0:
frame_parameters = camera_hardware_source.get_frame_parameters(0)
frame_parameters.exposure_ms = exposure_time_ms
camera_hardware_source.set_frame_parameters(0, frame_parameters)
self.__update_estimate()
self.__exposure_time_ms_value_model.on_value_changed = update_exposure_time_ms
exposure_time_ms_value_binding = Binding.PropertyBinding(self.__exposure_time_ms_value_model, "value", converter=Converter.FloatToStringConverter("{0:.1f}"))
def eels_profile_parameters_changed(profile_index, frame_parameters):
if profile_index == 0:
expected_dimensions = camera_hardware_source.get_expected_dimensions(frame_parameters.binning)
self.__camera_width = expected_dimensions[1]
self.__camera_height = expected_dimensions[0]
self.__exposure_time_ms_value_model.value = frame_parameters.exposure_ms
self.__update_estimate()
self.__eels_frame_parameters_changed_event_listener = camera_hardware_source.frame_parameters_changed_event.listen(eels_profile_parameters_changed)
eels_profile_parameters_changed(0, camera_hardware_source.get_frame_parameters(0))
self.__exposure_time_widget._widget.bind_text(exposure_time_ms_value_binding) # the widget will close the binding
def connect_scan_hardware_source(self, scan_hardware_source):
self.__scan_width_model = Model.PropertyModel()
self.__scan_height_model = Model.PropertyModel()
scan_width_binding = Binding.PropertyBinding(
self.__scan_width_model,
"value",
converter=Converter.IntegerToStringConverter())
scan_height_binding = Binding.PropertyBinding(
self.__scan_height_model,
"value",
converter=Converter.IntegerToStringConverter())
def scan_profile_parameters_changed(profile_index, frame_parameters):
if profile_index == 2:
self.__scan_width_model.value = frame_parameters.size[1]
self.__scan_height_model.value = frame_parameters.size[0]
self.__scan_frame_parameters_changed_event_listener = scan_hardware_source.frame_parameters_changed_event.listen(
scan_profile_parameters_changed)
scan_profile_parameters_changed(
2, scan_hardware_source.get_frame_parameters(2))
def update_scan_width(scan_width):
if scan_width > 0:
frame_parameters = scan_hardware_source.get_frame_parameters(2)
frame_parameters.size = frame_parameters.size[0], scan_width
scan_hardware_source.set_frame_parameters(2, frame_parameters)
self.__update_estimate()
def update_scan_height(scan_height):
if scan_height > 0:
frame_parameters = scan_hardware_source.get_frame_parameters(2)
frame_parameters.size = scan_height, frame_parameters.size[1]
scan_hardware_source.set_frame_parameters(2, frame_parameters)
self.__update_estimate()
# only connect model to update hardware source after it has been initialized.
self.__scan_width_model.on_value_changed = update_scan_width
self.__scan_height_model.on_value_changed = update_scan_height
self.__scan_width_widget._widget.bind_text(
scan_width_binding) # the widget will close the binding
self.__scan_height_widget._widget.bind_text(
scan_height_binding) # the widget will close the binding
def __init__(self, ui, app=None):
super().__init__(ui, app)
# a text model to hold the label widget text
text_model = Model.PropertyModel(0)
# make bitmap_data (random static) for icon push button
bitmap = numpy.zeros((32, 32, 4), numpy.uint8)
bitmap[..., 0] = (numpy.random.randn(32, 32) * 255).astype(
numpy.uint8) # blue
bitmap[..., 1] = (numpy.random.randn(32, 32) * 255).astype(
numpy.uint8) # green
bitmap[..., 2] = (numpy.random.randn(32, 32) * 255).astype(
numpy.uint8) # red
bitmap[..., 3] = 255
bitmap_data = bitmap.view(numpy.uint32).reshape(bitmap.shape[:-1])
# create the widgets for the window
label_widget = self.ui.create_label_widget()
push_button_widget = self.ui.create_push_button_widget("Push Me")
icon_button_widget = self.ui.create_push_button_widget()
icon_button_widget.icon = bitmap_data
# create a row for the buttons
button_row = self.ui.create_row_widget()
button_row.add_spacing(13)
button_row.add(push_button_widget)
button_row.add_spacing(13)
button_row.add(icon_button_widget)
button_row.add_stretch()
# create a row for the label
label_row = self.ui.create_row_widget()
label_row.add_spacing(13)
label_row.add(label_widget)
label_row.add_stretch()
# create a column to hold the two rows and attach it to the window
content = self.ui.create_column_widget()
content.add(button_row)
content.add(label_row)
self.attach_widget(content)
# when either button is clicked, this will be called
def button_clicked():
text_model.value = text_model.value + 1
# connect the buttons to the button_clicked function
push_button_widget.on_clicked = button_clicked
icon_button_widget.on_clicked = button_clicked
# and bind the label txt to the 'value' property of the text_model, but attach an integer-to-string converter to it.
label_widget.bind_text(
Binding.PropertyBinding(
text_model,
"value",
converter=Converter.IntegerToStringConverter(
format="You have clicked {:d} times.")))
def configure_binding():
if self._source and self._target:
assert not self.__binding
self.__binding = Binding.PropertyBinding(
self._source, self.source_property)
self.__binding.target_setter = self.__set_target_from_source
# while reading, the data item in the display data channel will not be connected;
# we still set its value here. when the data item becomes valid, it will update.
self.__binding.update_target_direct(
self.__binding.get_target_value())
def connect_camera_hardware_source(
self,
camera_hardware_source: HardwareSource.HardwareSource) -> None:
assert isinstance(camera_hardware_source,
camera_base.CameraHardwareSource)
self.__exposure_time_ms_value_model = Model.PropertyModel[float]()
def update_exposure_time_ms(
exposure_time_ms: typing.Optional[float]) -> None:
if exposure_time_ms is not None and exposure_time_ms > 0 and isinstance(
camera_hardware_source, camera_base.CameraHardwareSource):
frame_parameters = camera_hardware_source.get_frame_parameters(
0)
frame_parameters.exposure_ms = exposure_time_ms
camera_hardware_source.set_frame_parameters(
0, frame_parameters)
self.__update_estimate()
self.__exposure_time_ms_value_model.on_value_changed = update_exposure_time_ms
exposure_time_ms_value_binding = Binding.PropertyBinding(
self.__exposure_time_ms_value_model,
"value",
converter=Converter.FloatToStringConverter("{0:.1f}"))
def eels_profile_parameters_changed(
profile_index: int,
frame_parameters: camera_base.CameraFrameParameters) -> None:
if profile_index == 0 and isinstance(
camera_hardware_source, camera_base.CameraHardwareSource):
expected_dimensions = camera_hardware_source.get_expected_dimensions(
frame_parameters.binning)
self.__camera_width = expected_dimensions[1]
self.__camera_height = expected_dimensions[0]
if self.__exposure_time_ms_value_model:
self.__exposure_time_ms_value_model.value = frame_parameters.exposure_ms
self.__update_estimate()
self.__eels_frame_parameters_changed_event_listener = camera_hardware_source.frame_parameters_changed_event.listen(
eels_profile_parameters_changed)
eels_profile_parameters_changed(
0, camera_hardware_source.get_frame_parameters(0))
typing.cast(UserInterfaceModule.LineEditWidget,
self.__exposure_time_widget._widget).bind_text(
exposure_time_ms_value_binding
) # the widget will close the binding
def __init__(self, window: Window.Window, profile: Profile.Profile):
content_widget = window.ui.create_column_widget()
super().__init__(content_widget)
ui = window.ui
self._tree_model = TreeModel(profile)
def closed_items_changed(closed_items: typing.Set[str]) -> None:
profile.closed_items = list(closed_items)
self._tree_model.on_closed_items_changed = closed_items_changed
self._tree_selection = Selection.IndexedSelection(
Selection.Style.multiple)
projects_list_widget = Widgets.ListWidget(
ui,
ProjectTreeCanvasItemDelegate(window, self._tree_model),
selection=self._tree_selection,
v_scroll_enabled=False,
v_auto_resize=True)
projects_list_widget.wants_drag_events = True
projects_list_widget.bind_items(
Binding.PropertyBinding(self._tree_model, "value"))
projects_section = Widgets.SectionWidget(ui, _("Projects"),
projects_list_widget)
projects_section.expanded = True
content_widget.add(projects_section)
# configure an observer for watching for project references changes.
# this serves as the master updater for changes. move to document controller?
def project_references_changed(item: Observer.ItemValue) -> None:
# update the tree model.
project_references = typing.cast(
typing.Sequence[Profile.ProjectReference], item)
self._tree_model.update_project_references(project_references)
oo = Observer.ObserverBuilder()
oo.source(profile).ordered_sequence_from_array(
"project_references").collect_list().action_fn(
project_references_changed)
self.__projects_model_observer = typing.cast(
Observer.AbstractItemSource, oo.make_observable())
def __init__(self, document_controller,
instrument: InstrumentDevice.Instrument):
super().__init__(
document_controller.ui.create_column_widget(properties={
"margin": 6,
"spacing": 2
}))
self.document_controller = document_controller
ui = document_controller.ui
sample_combo_box = ui.create_combo_box_widget(instrument.sample_titles)
sample_combo_box.current_index = instrument.sample_index
sample_combo_box.bind_current_index(
Binding.PropertyBinding(instrument, "sample_index"))
voltage_field = ui.create_line_edit_widget()
voltage_field.bind_text(
Binding.PropertyBinding(
instrument,
"voltage",
converter=Converter.PhysicalValueToStringConverter(
units="keV", multiplier=1E-3)))
beam_current_field = ui.create_line_edit_widget()
beam_current_field.bind_text(
ControlBinding(instrument,
"BeamCurrent",
converter=Converter.PhysicalValueToStringConverter(
units="pA", multiplier=1E12)))
stage_position_widget = PositionWidget(ui, _("Stage"), instrument,
"stage_position_m")
drift_widget = PositionWidget(ui, _("Drift"), instrument, "Drift")
beam_shift_widget = PositionWidget(ui, _("Beam"), instrument,
"beam_shift_m")
defocus_field = ui.create_line_edit_widget()
defocus_field.bind_text(
ControlBinding(instrument,
"C10",
converter=Converter.PhysicalValueToStringConverter(
units="nm", multiplier=1E9)))
c12_widget = PositionWidget(ui, _("C12"), instrument, "C12")
c21_widget = PositionWidget(ui, _("C21"), instrument, "C21")
c23_widget = PositionWidget(ui, _("C23"), instrument, "C23")
c3_field = ui.create_line_edit_widget()
c3_field.bind_text(
ControlBinding(instrument,
"C30",
converter=Converter.PhysicalValueToStringConverter(
units="nm", multiplier=1E9)))
c32_widget = PositionWidget(ui, _("C32"), instrument, "C32")
c34_widget = PositionWidget(ui, _("C34"), instrument, "C34")
blanked_checkbox = ui.create_check_box_widget(_("Beam Blanked"))
blanked_checkbox.bind_checked(
Binding.PropertyBinding(instrument, "is_blanked"))
slit_in_checkbox = ui.create_check_box_widget(_("Slit In"))
slit_in_checkbox.bind_checked(
Binding.PropertyBinding(instrument, "is_slit_in"))
voa_in_checkbox = ui.create_check_box_widget(_("VOA In"))
voa_in_checkbox.bind_checked(ControlBinding(instrument, "S_VOA"))
convergenve_angle_field = ui.create_line_edit_widget()
convergenve_angle_field.bind_text(
ControlBinding(instrument,
"ConvergenceAngle",
converter=Converter.PhysicalValueToStringConverter(
units="mrad", multiplier=1E3)))
c_aperture_widget = PositionWidget(ui,
_("CAperture"),
instrument,
"CAperture",
unit="mrad",
multiplier=1E3)
aperture_round_widget = PositionWidget(ui,
_("ApertureRound"),
instrument,
"ApertureRound",
unit="",
multiplier=1)
energy_offset_field = ui.create_line_edit_widget()
energy_offset_field.bind_text(
Binding.PropertyBinding(
instrument,
"energy_offset_eV",
converter=Converter.FloatToStringConverter()))
energy_dispersion_field = ui.create_line_edit_widget()
energy_dispersion_field.bind_text(
Binding.PropertyBinding(
instrument,
"energy_per_channel_eV",
converter=Converter.FloatToStringConverter()))
beam_row = ui.create_row_widget()
beam_row.add_spacing(8)
beam_row.add(blanked_checkbox)
beam_row.add_spacing(8)
beam_row.add(voa_in_checkbox)
beam_row.add_stretch()
eels_row = ui.create_row_widget()
eels_row.add_spacing(8)
eels_row.add(slit_in_checkbox)
eels_row.add_spacing(8)
eels_row.add(ui.create_label_widget("+eV"))
eels_row.add_spacing(4)
eels_row.add(energy_offset_field)
eels_row.add_spacing(8)
eels_row.add(ui.create_label_widget("eV/ch"))
eels_row.add_spacing(4)
eels_row.add(energy_dispersion_field)
eels_row.add_stretch()
defocus_row = ui.create_row_widget()
defocus_row.add_spacing(8)
defocus_row.add_spacing(8)
defocus_row.add(ui.create_label_widget("Defocus"))
defocus_row.add(defocus_field)
defocus_row.add_stretch()
c3_row = ui.create_row_widget()
c3_row.add_spacing(8)
c3_row.add_spacing(8)
c3_row.add(ui.create_label_widget("Spherical Aberration"))
c3_row.add(c3_field)
c3_row.add_stretch()
sample_row = ui.create_row_widget()
sample_row.add_spacing(8)
sample_row.add_spacing(8)
sample_row.add(sample_combo_box)
sample_row.add_stretch()
voltage_row = ui.create_row_widget()
voltage_row.add_spacing(8)
voltage_row.add_spacing(8)
voltage_row.add(ui.create_label_widget("Voltage"))
voltage_row.add(voltage_field)
voltage_row.add_stretch()
beam_current_row = ui.create_row_widget()
beam_current_row.add_spacing(8)
beam_current_row.add_spacing(8)
beam_current_row.add(ui.create_label_widget("Beam Current"))
beam_current_row.add(beam_current_field)
beam_current_row.add_stretch()
convergence_angle_row = ui.create_row_widget()
convergence_angle_row.add_spacing(8)
convergence_angle_row.add_spacing(8)
convergence_angle_row.add(ui.create_label_widget("Convergence Angle"))
convergence_angle_row.add(convergenve_angle_field)
convergence_angle_row.add_stretch()
column = self.content_widget
column.add(sample_row)
column.add(voltage_row)
column.add(beam_current_row)
column.add(stage_position_widget)
column.add(drift_widget)
column.add(beam_shift_widget)
column.add(defocus_row)
column.add(c12_widget)
column.add(c21_widget)
column.add(c23_widget)
column.add(c3_row)
column.add(c32_widget)
column.add(c34_widget)
column.add(beam_row)
column.add(convergence_angle_row)
column.add(c_aperture_widget)
column.add(aperture_round_widget)
column.add(eels_row)
column.add_stretch()
def create_panel_widget(self, ui, document_controller):
self.__scan_hardware_source_choice = HardwareSourceChoice.HardwareSourceChoice(
ui._ui, "scan_acquisition_hardware_source_id", lambda
hardware_source: hardware_source.features.get("is_scanning"))
column = ui.create_column_widget()
# define the main controls
source_combo_box = self.__scan_hardware_source_choice.create_combo_box(
ui._ui)
count_line_edit = ui.create_line_edit_widget()
grab_button = ui.create_push_button_widget(_("Grab Previous"))
record_button = ui.create_push_button_widget(_("Record Next"))
cancel_button = ui.create_push_button_widget(_("Cancel"))
progress_bar = ui._ui.create_progress_bar_widget(properties={
"height": 18,
"min-width": 200
})
progress_bar.minimum = 0
progress_bar.maximum = 100
# define the layout
source_row = ui.create_row_widget()
source_row.add_spacing(12)
source_row.add(WidgetWrapper(source_combo_box))
source_row.add_spacing(12)
source_row.add_stretch()
count_row = ui.create_row_widget()
count_row.add_spacing(12)
count_row.add(ui.create_label_widget(_("Frames")))
count_row.add_spacing(12)
count_row.add(count_line_edit)
count_row.add_spacing(12)
count_row.add_stretch()
button_row = ui.create_row_widget()
button_row.add_spacing(12)
button_row.add(grab_button)
button_row.add_spacing(12)
button_row.add(record_button)
button_row.add_spacing(12)
button_row.add(cancel_button)
button_row.add_spacing(12)
button_row.add_stretch()
progress_bar_row = ui.create_row_widget()
progress_bar_row.add_stretch()
progress_bar_row.add_spacing(12)
progress_bar_row.add(WidgetWrapper(progress_bar))
progress_bar_row.add_spacing(12)
progress_bar_row.add_stretch()
column.add_spacing(8)
column.add(source_row)
column.add(count_row)
column.add(button_row)
column.add(progress_bar_row)
column.add_spacing(8)
column.add_stretch()
# connect the pieces
def state_property_changed(property):
if not self.__scan_hardware_source:
source_combo_box.enabled = True
count_line_edit._widget.enabled = False
grab_button._widget.enabled = False
record_button._widget.enabled = False
cancel_button._widget.enabled = False
elif self.__controller.state.value == "idle":
source_combo_box.enabled = True
count_line_edit._widget.enabled = True
grab_button._widget.enabled = True
record_button._widget.enabled = True
cancel_button._widget.enabled = False
elif self.__controller.state.value == "running":
source_combo_box.enabled = False
count_line_edit._widget.enabled = False
grab_button._widget.enabled = False
record_button._widget.enabled = False
cancel_button._widget.enabled = True
def scan_hardware_source_changed(hardware_source):
self.__scan_hardware_source = hardware_source
state_property_changed("value")
self.__scan_hardware_changed_event_listener = self.__scan_hardware_source_choice.hardware_source_changed_event.listen(
scan_hardware_source_changed)
count_line_edit._widget.bind_text(
Binding.PropertyBinding(
self.__controller.frame_count_model,
"value",
converter=Converter.IntegerToStringConverter(),
validator=Validator.IntegerRangeValidator(1, 100)))
self.__state_changed_listener = self.__controller.state.property_changed_event.listen(
state_property_changed)
progress_bar.bind_value(
Binding.PropertyBinding(self.__controller.progress_model, "value"))
event_loop = document_controller._document_controller.event_loop
def grab():
event_loop.create_task(
self.__controller.grab(
document_controller._document_controller,
self.__scan_hardware_source, False))
def record():
event_loop.create_task(
self.__controller.grab(
document_controller._document_controller,
self.__scan_hardware_source, True))
grab_button.on_clicked = grab
record_button.on_clicked = record
cancel_button.on_clicked = self.__controller.cancel
scan_hardware_source_changed(
self.__scan_hardware_source_choice.hardware_source)
return column
def create_panel_widget(
self, ui: Facade.UserInterface,
document_controller: Facade.DocumentWindow) -> Facade.ColumnWidget:
stem_controller_ = typing.cast(
stem_controller.STEMController,
Registry.get_component("stem_controller"))
self.__scan_hardware_source_choice_model = ui._ui.create_persistent_string_model(
"scan_acquisition_hardware_source_id")
self.__scan_hardware_source_choice = HardwareSourceChoice.HardwareSourceChoice(
self.__scan_hardware_source_choice_model,
lambda hardware_source: hardware_source.features.get(
"is_scanning", False))
self.__camera_hardware_source_choice_model = ui._ui.create_persistent_string_model(
"scan_acquisition_camera_hardware_source_id")
self.__camera_hardware_source_choice = HardwareSourceChoice.HardwareSourceChoice(
self.__camera_hardware_source_choice_model,
lambda hardware_source: hardware_source.features.get(
"is_camera", False))
self.__scan_hardware_source_stream = HardwareSourceChoice.HardwareSourceChoiceStream(
self.__scan_hardware_source_choice).add_ref()
self.__camera_hardware_source_stream = HardwareSourceChoice.HardwareSourceChoiceStream(
self.__camera_hardware_source_choice).add_ref()
def clear_scan_context_fields() -> None:
self.__roi_description.text = _("Scan context not active")
self.__scan_label_widget.text = None
self.__scan_specifier.scan_context = stem_controller.ScanContext()
self.__scan_specifier.scan_count = 1
self.__scan_specifier.size = None
self.__scan_specifier.drift_interval_lines = 0
self.__scan_specifier.drift_interval_scans = 0
self.__acquire_button._widget.enabled = self.__acquisition_state == SequenceState.scanning # focus will be on the SI data, so enable if scanning
self.__scan_pixels = 0
def update_context() -> None:
assert self.__scan_hardware_source_choice
scan_hardware_source = typing.cast(
scan_base.ScanHardwareSource,
self.__scan_hardware_source_choice.hardware_source)
if not scan_hardware_source:
clear_scan_context_fields()
return
scan_context = scan_hardware_source.scan_context
scan_context_size = scan_context.size
exposure_ms = self.__exposure_time_ms_value_model.value or 0.0 if self.__exposure_time_ms_value_model else 0.0
if scan_context.is_valid and scan_hardware_source.line_scan_enabled and scan_hardware_source.line_scan_vector:
assert scan_context_size
calibration = scan_context.calibration
start = Geometry.FloatPoint.make(
scan_hardware_source.line_scan_vector[0])
end = Geometry.FloatPoint.make(
scan_hardware_source.line_scan_vector[1])
length = int(
Geometry.distance(start, end) * scan_context_size.height)
max_dim = max(scan_context_size.width,
scan_context_size.height)
length_str = calibration.convert_to_calibrated_size_str(
length, value_range=(0, max_dim), samples=max_dim)
line_str = _("Line Scan")
self.__roi_description.text = f"{line_str} {length_str} ({length} px)"
scan_str = _("Scan (1D)")
scan_length = max(self.__scan_width, 1)
self.__scan_label_widget.text = f"{scan_str} {scan_length} px"
self.__scan_pixels = scan_length
self.__scan_specifier.scan_context = copy.deepcopy(
scan_context)
self.__scan_specifier.scan_count = max(self.__scan_count, 1)
self.__scan_specifier.size = 1, scan_length
self.__scan_specifier.drift_interval_lines = 0
self.__scan_specifier.drift_interval_scans = 0
self.__acquire_button._widget.enabled = True
elif scan_context.is_valid and scan_hardware_source.subscan_enabled and scan_hardware_source.subscan_region:
assert scan_context_size
calibration = scan_context.calibration
width = scan_hardware_source.subscan_region.width * scan_context_size.width
height = scan_hardware_source.subscan_region.height * scan_context_size.height
width_str = calibration.convert_to_calibrated_size_str(
width,
value_range=(0, scan_context_size.width),
samples=scan_context_size.width)
height_str = calibration.convert_to_calibrated_size_str(
height,
value_range=(0, scan_context_size.height),
samples=scan_context_size.height)
rect_str = _("Subscan")
self.__roi_description.text = f"{rect_str} {width_str} x {height_str} ({int(width)} px x {int(height)} px)"
scan_str = _("Scan (2D)")
scan_width = self.__scan_width
scan_height = int(self.__scan_width * height / width)
drift_lines = scan_hardware_source.calculate_drift_lines(
scan_width, exposure_ms /
1000) if scan_hardware_source else 0
drift_str = f" / Drift {drift_lines} lines" if drift_lines > 0 else str(
)
drift_scans = scan_hardware_source.calculate_drift_scans()
drift_str = f" / Drift {drift_scans} scans" if drift_scans > 0 else drift_str
self.__scan_label_widget.text = f"{scan_str} {scan_width} x {scan_height} px" + drift_str
self.__scan_pixels = scan_width * scan_height
self.__scan_specifier.scan_context = copy.deepcopy(
scan_context)
self.__scan_specifier.scan_count = max(self.__scan_count, 1)
self.__scan_specifier.size = scan_height, scan_width
self.__scan_specifier.drift_interval_lines = drift_lines
self.__scan_specifier.drift_interval_scans = drift_scans
self.__acquire_button._widget.enabled = True
elif scan_context.is_valid:
assert scan_context_size
calibration = scan_context.calibration
width = scan_context_size.width
height = scan_context_size.height
width_str = calibration.convert_to_calibrated_size_str(
width,
value_range=(0, scan_context_size.width),
samples=scan_context_size.width)
height_str = calibration.convert_to_calibrated_size_str(
height,
value_range=(0, scan_context_size.height),
samples=scan_context_size.height)
data_str = _("Context Scan")
self.__roi_description.text = f"{data_str} {width_str} x {height_str} ({int(width)} x {int(height)})"
scan_str = _("Scan (2D)")
scan_width = self.__scan_width
scan_height = int(self.__scan_width * height / width)
drift_lines = scan_hardware_source.calculate_drift_lines(
scan_width, exposure_ms /
1000) if scan_hardware_source else 0
drift_str = f" / Drift {drift_lines} lines" if drift_lines > 0 else str(
)
drift_scans = scan_hardware_source.calculate_drift_scans()
drift_str = f" / Drift {drift_scans} scans" if drift_scans > 0 else drift_str
self.__scan_label_widget.text = f"{scan_str} {scan_width} x {scan_height} px" + drift_str
self.__scan_pixels = scan_width * scan_height
self.__scan_specifier.scan_context = copy.deepcopy(
scan_context)
self.__scan_specifier.scan_count = max(self.__scan_count, 1)
self.__scan_specifier.size = scan_height, scan_width
self.__scan_specifier.drift_interval_lines = drift_lines
self.__scan_specifier.drift_interval_scans = drift_scans
self.__acquire_button._widget.enabled = True
else:
clear_scan_context_fields()
self.__scan_count_widget.text = Converter.IntegerToStringConverter(
).convert(self.__scan_count)
self.__scan_width_widget.text = Converter.IntegerToStringConverter(
).convert(self.__scan_width)
self.__update_estimate()
def stem_controller_property_changed(key: str) -> None:
if key in ("subscan_state", "subscan_region", "subscan_rotation",
"line_scan_state", "line_scan_vector",
"drift_channel_id", "drift_region", "drift_settings"):
document_controller._document_controller.event_loop.call_soon_threadsafe(
update_context)
def scan_context_changed() -> None:
# this can be triggered from a thread, so use call soon to transfer it to the UI thread.
document_controller._document_controller.event_loop.call_soon_threadsafe(
update_context)
self.__stem_controller_property_listener = None
self.__scan_context_changed_listener = None
if stem_controller_:
self.__stem_controller_property_listener = stem_controller_.property_changed_event.listen(
stem_controller_property_changed)
self.__scan_context_changed_listener = stem_controller_.scan_context_changed_event.listen(
scan_context_changed)
column = ui.create_column_widget()
self.__styles_list_model = ListModel.ListModel[
ScanAcquisitionProcessing](items=[
ScanAcquisitionProcessing.SUM_PROJECT,
ScanAcquisitionProcessing.NONE
])
self.__styles_list_property_model = ListModel.ListPropertyModel(
self.__styles_list_model)
self.__style_combo_box = ui.create_combo_box_widget(
self.__styles_list_property_model.value,
item_text_getter=operator.attrgetter("value.display_name"))
self.__style_combo_box._widget.set_property("min-width", 100)
items_binding = Binding.PropertyBinding(
self.__styles_list_property_model, "value")
items_binding.source_setter = None
typing.cast(UserInterfaceModule.ComboBoxWidget,
self.__style_combo_box._widget).bind_items(items_binding)
self.__style_combo_box.current_index = 0
self.__acquire_button = ui.create_push_button_widget(_("Acquire"))
self.__progress_bar = ui.create_progress_bar_widget()
# self.__progress_bar.enabled = False
self.__roi_description = ui.create_label_widget()
self.__scan_count_widget = ui.create_line_edit_widget()
self.__scan_count_widget._widget.set_property("width", 72)
self.__scan_processing_widget = ui.create_combo_box_widget(
items=["Raw", "Sum", "Raw + Sum"])
self.__scan_width_widget = ui.create_line_edit_widget()
self.__exposure_time_widget = ui.create_line_edit_widget()
self.__estimate_label_widget = ui.create_label_widget()
self.__scan_label_widget = ui.create_label_widget()
class ComboBoxWidget:
def __init__(self,
widget: UserInterfaceModule.ComboBoxWidget) -> None:
self.__combo_box_widget = widget
@property
def _widget(self) -> UserInterfaceModule.ComboBoxWidget:
return self.__combo_box_widget
camera_row = ui.create_row_widget()
camera_row.add_spacing(12)
camera_row.add(
ComboBoxWidget(
self.__camera_hardware_source_choice.create_combo_box(ui._ui)))
camera_row.add_spacing(12)
camera_row.add(self.__style_combo_box)
camera_row.add_spacing(12)
camera_row.add_stretch()
scan_choice_row = ui.create_row_widget()
scan_choice_row.add_spacing(12)
scan_choice_row.add(
ComboBoxWidget(
self.__scan_hardware_source_choice.create_combo_box(ui._ui)))
scan_choice_row.add_spacing(12)
scan_choice_row.add_stretch()
scan_count_row = ui.create_row_widget()
scan_count_row.add_spacing(12)
scan_count_row.add(ui.create_label_widget("Scan Count"))
scan_count_row.add_spacing(12)
scan_count_row.add(self.__scan_count_widget)
scan_count_row.add_spacing(12)
scan_count_row.add(self.__scan_processing_widget)
scan_count_row.add_spacing(12)
scan_count_row.add_stretch()
roi_size_row = ui.create_row_widget()
roi_size_row.add_spacing(12)
roi_size_row.add(self.__roi_description)
roi_size_row.add_spacing(12)
roi_size_row.add_stretch()
scan_spacing_pixels_row = ui.create_row_widget()
scan_spacing_pixels_row.add_spacing(12)
scan_spacing_pixels_row.add(
ui.create_label_widget("Scan Width (pixels)"))
scan_spacing_pixels_row.add_spacing(12)
scan_spacing_pixels_row.add(self.__scan_width_widget)
scan_spacing_pixels_row.add_spacing(12)
scan_spacing_pixels_row.add_stretch()
eels_exposure_row = ui.create_row_widget()
eels_exposure_row.add_spacing(12)
eels_exposure_row.add(
ui.create_label_widget("Camera Exposure Time (ms)"))
eels_exposure_row.add_spacing(12)
eels_exposure_row.add(self.__exposure_time_widget)
eels_exposure_row.add_spacing(12)
eels_exposure_row.add_stretch()
scan_row = ui.create_row_widget()
scan_row.add_spacing(12)
scan_row.add(self.__scan_label_widget)
scan_row.add_stretch()
estimate_row = ui.create_row_widget()
estimate_row.add_spacing(12)
estimate_row.add(self.__estimate_label_widget)
estimate_row.add_stretch()
acquire_sequence_button_row = ui.create_row_widget()
acquire_sequence_button_row.add(self.__acquire_button)
acquire_sequence_button_row.add_spacing(8)
acquire_sequence_button_row.add(self.__progress_bar)
acquire_sequence_button_row.add_spacing(8)
if self.__scan_hardware_source_choice.hardware_source_count > 1:
column.add_spacing(8)
column.add(scan_choice_row)
column.add_spacing(8)
column.add(camera_row)
column.add_spacing(8)
column.add(scan_count_row)
column.add_spacing(8)
column.add(roi_size_row)
column.add_spacing(8)
column.add(scan_spacing_pixels_row)
column.add_spacing(8)
column.add(eels_exposure_row)
column.add_spacing(8)
column.add(scan_row)
column.add_spacing(8)
column.add(estimate_row)
column.add_spacing(8)
column.add(acquire_sequence_button_row)
column.add_spacing(8)
column.add_stretch()
def camera_hardware_source_changed(
hardware_source: typing.Optional[HardwareSource.HardwareSource]
) -> None:
styles_list_model = self.__styles_list_model
self.disconnect_camera_hardware_source()
if hardware_source and styles_list_model:
self.connect_camera_hardware_source(hardware_source)
if hardware_source.features.get("has_masked_sum_option"):
styles_list_model.items = [
ScanAcquisitionProcessing.SUM_PROJECT,
ScanAcquisitionProcessing.NONE,
ScanAcquisitionProcessing.SUM_MASKED
]
else:
styles_list_model.items = [
ScanAcquisitionProcessing.SUM_PROJECT,
ScanAcquisitionProcessing.NONE
]
self.__camera_hardware_changed_event_listener = self.__camera_hardware_source_choice.hardware_source_changed_event.listen(
camera_hardware_source_changed)
camera_hardware_source_changed(
self.__camera_hardware_source_choice.hardware_source)
def style_current_item_changed(current_item: str) -> None:
self.__update_estimate()
self.__style_combo_box.on_current_item_changed = style_current_item_changed
def scan_count_changed(text: str) -> None:
scan_count = Converter.IntegerToStringConverter().convert_back(
text) or 1
scan_count = max(scan_count, 1)
if scan_count != self.__scan_count:
self.__scan_count = scan_count
update_context()
self.__scan_count_widget.request_refocus()
self.__scan_count_widget.on_editing_finished = scan_count_changed
def scan_width_changed(text: str) -> None:
scan_width = Converter.IntegerToStringConverter().convert_back(
text) or 1
scan_width = max(scan_width, 1)
if scan_width != self.__scan_width:
self.__scan_width = scan_width
update_context()
self.__scan_width_widget.request_refocus()
self.__scan_width_widget.on_editing_finished = scan_width_changed
def acquisition_state_changed(
acquisition_state: SequenceState) -> None:
self.__acquisition_state = acquisition_state
async def update_state(is_idle: bool) -> None:
self.__acquire_button.text = _("Acquire") if is_idle else _(
"Cancel")
# self.__progress_bar.enabled = not is_idle
update_context() # update the cancel button
if is_idle and self.__progress_task:
self.__progress_task.cancel()
self.__progress_task = None
self.__progress_bar.value = 100
if not is_idle and not self.__progress_task:
async def update_progress() -> None:
while True:
if self.__scan_acquisition_controller:
self.__progress_bar.value = int(
100 *
self.__scan_acquisition_controller.progress
)
await asyncio.sleep(0.25)
self.__progress_task = document_controller._document_window.event_loop.create_task(
update_progress())
if acquisition_state == SequenceState.idle:
self.__scan_acquisition_controller = None
if self.__acquisition_state_changed_event_listener:
self.__acquisition_state_changed_event_listener.close()
self.__acquisition_state_changed_event_listener = None
document_controller._document_window.event_loop.create_task(
update_state(True))
else:
document_controller._document_window.event_loop.create_task(
update_state(False))
def acquire_sequence() -> None:
if self.__scan_acquisition_controller:
if self.__scan_acquisition_controller:
self.__scan_acquisition_controller.cancel()
else:
scan_hardware_source_choice = self.__scan_hardware_source_choice
assert scan_hardware_source_choice
if scan_hardware_source_choice.hardware_source:
scan_hardware_source = self.__api.get_hardware_source_by_id(
scan_hardware_source_choice.hardware_source.
hardware_source_id,
version="1.0")
else:
scan_hardware_source = None
camera_hardware_source_choice = self.__camera_hardware_source_choice
assert camera_hardware_source_choice
if camera_hardware_source_choice.hardware_source:
camera_hardware_source = self.__api.get_hardware_source_by_id(
camera_hardware_source_choice.hardware_source.
hardware_source_id,
version="1.0")
else:
camera_hardware_source = None
if scan_hardware_source and camera_hardware_source:
self.__scan_acquisition_controller = ScanAcquisitionController(
self.__api, document_controller, scan_hardware_source,
camera_hardware_source, self.__scan_specifier)
self.__acquisition_state_changed_event_listener = self.__scan_acquisition_controller.acquisition_state_changed_event.listen(
acquisition_state_changed)
scan_processing = ScanProcessing(
self.__scan_processing_widget.current_index in (0, 2),
self.__scan_processing_widget.current_index in (1, 2))
scan_acquisition_processing = self.__style_combo_box.current_item if self.__style_combo_box and self.__style_combo_box.current_item else ScanAcquisitionProcessing.NONE
self.__scan_acquisition_controller.start(
scan_acquisition_processing, scan_processing)
self.__acquire_button.on_clicked = acquire_sequence
self.__update_estimate()
update_context()
return column
def __init__(self,
document_controller: DocumentController.DocumentController,
data_item: DataItem.DataItem) -> None:
ui = document_controller.ui
super().__init__(ui,
_("Recorder"),
parent_window=document_controller,
persistent_id="Recorder" + str(data_item.uuid))
self.__recorder = Recorder(document_controller, data_item)
self.ui = ui
self.document_controller = document_controller
self.__data_item = data_item
self.__record_button = ui.create_push_button_widget(_("Record"))
def thumbnail_widget_drag(mime_data: UserInterface.MimeData,
thumbnail: typing.Optional[
DrawingContext.RGBA32Type],
hot_spot_x: int, hot_spot_y: int) -> None:
# use this convoluted base object for drag so that it doesn't disappear after the drag.
self.content.drag(mime_data, thumbnail, hot_spot_x, hot_spot_y)
display_item = document_controller.document_model.get_display_item_for_data_item(
data_item)
data_item_thumbnail_source = DataItemThumbnailWidget.DataItemThumbnailSource(
ui, display_item=display_item)
data_item_chooser_widget = DataItemThumbnailWidget.ThumbnailWidget(
ui, data_item_thumbnail_source, Geometry.IntSize(48, 48))
data_item_chooser_widget.on_drag = thumbnail_widget_drag
self.__recording_interval_property = Model.PropertyModel(1000)
self.__recording_count_property = Model.PropertyModel(20)
recording_period_widget = ui.create_line_edit_widget(
properties={"width": 60})
recording_period_widget.bind_text(
Binding.PropertyBinding(
self.__recording_interval_property,
"value",
converter=Converter.IntegerToStringConverter()))
recording_count_widget = ui.create_line_edit_widget(
properties={"width": 60})
recording_count_widget.bind_text(
Binding.PropertyBinding(
self.__recording_count_property,
"value",
converter=Converter.IntegerToStringConverter()))
row0 = ui.create_row_widget()
row0.add_stretch()
row0.add_spacing(8)
row0.add(self.__record_button)
row0.add_spacing(8)
row1 = ui.create_row_widget()
row1.add(ui.create_label_widget(_("Interval")))
row1.add_spacing(8)
row1.add(recording_period_widget)
row1.add_spacing(4)
row1.add(ui.create_label_widget(_("msec")))
row1.add_spacing(8)
row1.add_stretch()
row2 = ui.create_row_widget()
row2.add(ui.create_label_widget(_("Frames")))
row2.add_spacing(8)
row2.add(recording_count_widget)
row2.add_spacing(8)
row2.add_stretch()
column1 = ui.create_column_widget()
column1.add(row1)
column1.add_spacing(4)
column1.add(row2)
column1.add_spacing(4)
column1.add(row0)
button_row = ui.create_row_widget()
button_row.add_spacing(8)
button_row.add(data_item_chooser_widget)
button_row.add_spacing(8)
button_row.add_stretch()
button_row.add_spacing(8)
button_row.add(column1)
button_row.add_spacing(8)
def record_pressed() -> None:
if self.__recorder.recording_state == "recording":
self.__recorder.stop_recording()
else:
recording_interval = self.__recording_interval_property.value or 0.0
recording_count = self.__recording_count_property.value or 1
self.__recorder.start_recording(time.time(),
recording_interval / 1000,
recording_count)
self.__record_button.on_clicked = record_pressed
column = self.content
column.add_spacing(6)
column.add(button_row)
column.add_spacing(6)
def live_state_changed(is_live: bool) -> None:
self.__record_button.enabled = is_live
def recording_state_changed(recording_state: str) -> None:
if recording_state == "recording":
self.__record_button.text = _("Stop")
else:
self.__record_button.text = _("Record")
def data_item_removed() -> None:
self.request_close()
self.__recorder.on_live_state_changed = live_state_changed
self.__recorder.on_recording_state_changed = recording_state_changed
self.__recorder.on_data_item_removed = data_item_removed
live_state_changed(data_item.is_live)
recording_state_changed("stopped")
def test_property_binding_refcount(self) -> None:
binding = Binding.PropertyBinding(Model.PropertyModel(0), "value")
binding_ref = weakref.ref(binding)
del binding
self.assertIsNone(binding_ref())
def create_panel_widget(
self, ui: Facade.UserInterface,
document_controller: Facade.DocumentWindow) -> Facade.ColumnWidget:
# note: anything created here should be disposed in close.
# this method may be called more than once.
self.__controller = Controller()
self.__scan_hardware_source_choice_model = ui._ui.create_persistent_string_model(
"scan_acquisition_hardware_source_id")
self.__scan_hardware_source_choice = HardwareSourceChoice.HardwareSourceChoice(
self.__scan_hardware_source_choice_model,
lambda hardware_source: hardware_source.features.get(
"is_scanning", False))
column = ui.create_column_widget()
# define the main controls
source_combo_box = self.__scan_hardware_source_choice.create_combo_box(
ui._ui)
count_line_edit = ui.create_line_edit_widget()
grab_button = ui.create_push_button_widget(_("Grab Previous"))
record_button = ui.create_push_button_widget(_("Record Next"))
cancel_button = ui.create_push_button_widget(_("Cancel"))
progress_bar = ui._ui.create_progress_bar_widget(properties={
"height": 18,
"min-width": 200
})
progress_bar.minimum = 0
progress_bar.maximum = 100
# define the layout
source_row = ui.create_row_widget()
source_row.add_spacing(12)
source_row.add(WidgetWrapper[UserInterfaceModule.ComboBoxWidget](
source_combo_box))
source_row.add_spacing(12)
source_row.add_stretch()
count_row = ui.create_row_widget()
count_row.add_spacing(12)
count_row.add(ui.create_label_widget(_("Frames")))
count_row.add_spacing(12)
count_row.add(count_line_edit)
count_row.add_spacing(12)
count_row.add_stretch()
button_row = ui.create_row_widget()
button_row.add_spacing(12)
button_row.add(grab_button)
button_row.add_spacing(12)
button_row.add(record_button)
button_row.add_spacing(12)
button_row.add(cancel_button)
button_row.add_spacing(12)
button_row.add_stretch()
progress_bar_row = ui.create_row_widget()
progress_bar_row.add_stretch()
progress_bar_row.add_spacing(12)
progress_bar_row.add(
WidgetWrapper[UserInterfaceModule.ProgressBarWidget](progress_bar))
progress_bar_row.add_spacing(12)
progress_bar_row.add_stretch()
column.add_spacing(8)
column.add(source_row)
column.add(count_row)
column.add(button_row)
column.add(progress_bar_row)
column.add_spacing(8)
column.add_stretch()
# connect the pieces
def state_property_changed(property: str) -> None:
if not self.__scan_hardware_source:
source_combo_box.enabled = True
count_line_edit._widget.enabled = False
grab_button._widget.enabled = False
record_button._widget.enabled = False
cancel_button._widget.enabled = False
elif self.__controller and self.__controller.state.value == "idle":
source_combo_box.enabled = True
count_line_edit._widget.enabled = True
grab_button._widget.enabled = True
record_button._widget.enabled = True
cancel_button._widget.enabled = False
elif self.__controller and self.__controller.state.value == "running":
source_combo_box.enabled = False
count_line_edit._widget.enabled = False
grab_button._widget.enabled = False
record_button._widget.enabled = False
cancel_button._widget.enabled = True
def scan_hardware_source_changed(
hardware_source: typing.Optional[HardwareSource.HardwareSource]
) -> None:
if isinstance(hardware_source, scan_base.ScanHardwareSource):
self.__scan_hardware_source = hardware_source
state_property_changed("value")
self.__scan_hardware_changed_event_listener = self.__scan_hardware_source_choice.hardware_source_changed_event.listen(
scan_hardware_source_changed)
typing.cast(UserInterfaceModule.LineEditWidget,
count_line_edit._widget).bind_text(
Binding.PropertyBinding(
self.__controller.frame_count_model,
"value",
converter=Converter.IntegerToStringConverter(),
validator=Validator.IntegerRangeValidator(1, 100)))
self.__state_changed_listener = self.__controller.state.property_changed_event.listen(
state_property_changed)
progress_bar.bind_value(
Binding.PropertyBinding(self.__controller.progress_model, "value"))
event_loop = document_controller._document_controller.event_loop
def grab() -> None:
if self.__controller and self.__scan_hardware_source:
event_loop.create_task(
self.__controller.grab(
document_controller._document_controller,
self.__scan_hardware_source, False))
def record() -> None:
if self.__controller and self.__scan_hardware_source:
event_loop.create_task(
self.__controller.grab(
document_controller._document_controller,
self.__scan_hardware_source, True))
grab_button.on_clicked = grab
record_button.on_clicked = record
cancel_button.on_clicked = self.__controller.cancel
scan_hardware_source_changed(
self.__scan_hardware_source_choice.hardware_source)
return column
def make_image_chooser(document_controller, computation, variable):
ui = document_controller.ui
document_model = document_controller.document_model
column = ui.create_column_widget()
row = ui.create_row_widget()
label_column = ui.create_column_widget()
label_widget = ui.create_label_widget(variable.display_label,
properties={"width": 80})
label_widget.bind_text(Binding.PropertyBinding(variable, "display_label"))
label_column.add(label_widget)
label_column.add_stretch()
row.add(label_column)
row.add_spacing(8)
def drop_mime_data(mime_data, x, y):
if mime_data.has_format(MimeTypes.DISPLAY_ITEM_MIME_TYPE):
display_item_uuid = uuid.UUID(
mime_data.data_as_string(MimeTypes.DISPLAY_ITEM_MIME_TYPE))
display_item = document_model.get_display_item_by_uuid(
display_item_uuid)
data_item = display_item.data_item if display_item else None
if data_item:
variable_specifier = document_model.get_object_specifier(
display_item.display_data_channel)
if variable.objects_model.items:
variable.objects_model.remove_item(0)
variable.objects_model.append_item(variable_specifier)
return "copy"
return None
def data_item_delete():
if variable.objects_model.items:
variable.objects_model.remove_item(0)
display_item = None
if variable.object_specifiers:
base_variable_specifier = copy.copy(variable.object_specifiers[0])
bound_data_source = document_model.resolve_object_specifier(
base_variable_specifier)
data_item = bound_data_source.value.data_item if bound_data_source else None
display_item = document_model.get_display_item_for_data_item(data_item)
data_item_thumbnail_source = DataItemThumbnailWidget.DataItemThumbnailSource(
ui, display_item=display_item)
data_item_chooser_widget = DataItemThumbnailWidget.ThumbnailWidget(
ui, data_item_thumbnail_source, Geometry.IntSize(80, 80))
def thumbnail_widget_drag(mime_data, thumbnail, hot_spot_x, hot_spot_y):
# use this convoluted base object for drag so that it doesn't disappear after the drag.
try:
column.drag(mime_data, thumbnail, hot_spot_x, hot_spot_y)
except Exception as e:
print(e)
import traceback
traceback.print_exc()
data_item_chooser_widget.on_drag = thumbnail_widget_drag
data_item_chooser_widget.on_drop_mime_data = drop_mime_data
data_item_chooser_widget.on_delete = data_item_delete
def property_changed(key):
if key == "object_specifiers":
if variable.object_specifiers:
base_variable_specifier = copy.copy(
variable.object_specifiers[0])
bound_data_item = document_model.resolve_object_specifier(
base_variable_specifier)
data_item = bound_data_item.value.data_item if bound_data_item else None
display_item = document_model.get_display_item_for_data_item(
data_item)
data_item_thumbnail_source.set_display_item(display_item)
else:
data_item_thumbnail_source.set_display_item(None)
property_changed_listener = variable.property_changed_event.listen(
property_changed)
row.add(data_item_chooser_widget)
row.add_stretch()
column.add(row)
column.add_spacing(4)
return column, [property_changed_listener]
