class SPipelineListWidget(QWidget):
"""Widget that contains a list of widgets to build a pipeline"""
def __init__(self):
super().__init__()
self.input_layer_name = ''
self._count = 0
list_widget = QWidget()
list_widget.setAttribute(QtCore.Qt.WA_StyledBackground, True)
scroll_widget = QScrollArea()
scroll_widget.setWidgetResizable(True)
scroll_widget.setWidget(list_widget)
layout = QVBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
layout.addWidget(scroll_widget)
self.setLayout(layout)
self.layout = QVBoxLayout()
self.layout.addWidget(QWidget(), 1, QtCore.Qt.AlignTop)
list_widget.setLayout(self.layout)
def add_widget(self, name, widget):
"""add a widget to the pipeline"""
self._count += 1
widget_ = SProcessInListWidget(str(self._count), name, widget)
widget_.remove.connect(self._on_remove_widget)
index = self.layout.count()-1
self.layout.insertWidget(index, widget_, 0, QtCore.Qt.AlignTop)
def _on_remove_widget(self, uuid):
"""Remove a filter
Parameters
----------
uuid: int
Unique id of the filter to remove
"""
# remove from widget list
for i in range(self.layout.count()):
item = self.layout.itemAt(i)
widget = item.widget()
if widget:
if hasattr(widget, 'uuid'):
if widget.uuid == uuid:
item_d = self.layout.takeAt(i)
item_d.widget().deleteLater()
break
def widgets(self):
"""Returns all the widgets in the pipeline"""
widgets_ = list()
for i in range(self.layout.count()):
item = self.layout.itemAt(i)
widget = item.widget()
if widget:
if hasattr(widget, 'uuid'):
widgets_.append(widget)
#widgets_.append(widget.process_widget)
return widgets_
class TestViewManager:
def setup_method(self):
self._base_layout = QVBoxLayout()
self._view_manager = ViewManager(self._base_layout)
def test_current_view(self):
# Arrange
view1: MagicMock = MockView()
view2: MagicMock = MockView()
# Act / Assert
self._view_manager.load_view(view1)
assert self._view_manager.current_view == view1
self._view_manager.load_view(view2)
assert self._view_manager.current_view == view2
def test_load_view_no_template(self):
# Arrange
view = MockView()
# Act
self._view_manager.load_view(view)
# Assert
assert self._base_layout.itemAt(0).widget() == view
assert view.load_called == True
def test_load_view_with_template(self):
# Arrange
view = MockView(template_class=MockViewTemplate1)
# Act
self._view_manager.load_view(view)
# Assert
assert self._view_manager.current_view == view.template
assert self._base_layout.itemAt(0).widget() == view.template
assert view.template.get_container().layout().itemAt(
0).widget() == view
assert view.template.load_called == True
assert view.load_called == True
def test_load_view_with_nested_templates(self):
# Arrange
view = MockView(template_class=MockViewTemplate2)
# Act
self._view_manager.load_view(view)
# Assert
assert self._view_manager.current_view == view.template.template
assert self._base_layout.itemAt(0).widget() == view.template.template
assert view.template.load_called == True
assert view.template.template.load_called == True
assert view.load_called == True
def test_load_view_null_view(self):
# Assert
with pytest.raises(ValueError):
self._view_manager.load_view(None)
class SimpleMeasurements(QWidget):
def __init__(self, settings: StackSettings, parent=None):
super().__init__(parent)
self.settings = settings
self.calculate_btn = QPushButton("Calculate")
self.calculate_btn.clicked.connect(self.calculate)
self.result_view = QTableWidget()
self.channel_select = ChannelComboBox()
self.units_select = EnumComboBox(Units)
self.units_select.set_value(self.settings.get("simple_measurements.units", Units.nm))
self.units_select.currentIndexChanged.connect(self.change_units)
layout = QHBoxLayout()
self.measurement_layout = QVBoxLayout()
l1 = QHBoxLayout()
l1.addWidget(QLabel("Units"))
l1.addWidget(self.units_select)
self.measurement_layout.addLayout(l1)
l2 = QHBoxLayout()
l2.addWidget(QLabel("Channel"))
l2.addWidget(self.channel_select)
self.measurement_layout.addLayout(l2)
layout.addLayout(self.measurement_layout)
result_layout = QVBoxLayout()
result_layout.addWidget(self.result_view)
result_layout.addWidget(self.calculate_btn)
layout.addLayout(result_layout)
self.setLayout(layout)
self.setWindowTitle("Measurement")
if self.window() == self:
try:
geometry = self.settings.get_from_profile("simple_measurement_window_geometry")
self.restoreGeometry(QByteArray.fromHex(bytes(geometry, "ascii")))
except KeyError:
pass
def closeEvent(self, event: QCloseEvent) -> None:
"""
Save geometry if widget is used as standalone window.
"""
if self.window() == self:
self.settings.set_in_profile(
"simple_measurement_window_geometry", self.saveGeometry().toHex().data().decode("ascii")
)
super().closeEvent(event)
def calculate(self):
if self.settings.segmentation is None:
QMessageBox.warning(self, "No segmentation", "need segmentation to work")
return
to_calculate = []
for i in range(2, self.measurement_layout.count()):
# noinspection PyTypeChecker
chk: QCheckBox = self.measurement_layout.itemAt(i).widget()
if chk.isChecked():
leaf: Leaf = MEASUREMENT_DICT[chk.text()].get_starting_leaf()
to_calculate.append(leaf.replace_(per_component=PerComponent.Yes, area=AreaType.ROI))
if not to_calculate:
QMessageBox.warning(self, "No measurement", "Select at least one measurement")
return
profile = MeasurementProfile("", [MeasurementEntry(x.name, x) for x in to_calculate])
dial = ExecuteFunctionDialog(
profile.calculate,
kwargs={
"channel": self.settings.image.get_channel(self.channel_select.get_value()),
"segmentation": self.settings.segmentation,
"mask": None,
"voxel_size": self.settings.image.spacing,
"result_units": self.units_select.get_value(),
},
)
dial.exec()
result: MeasurementResult = dial.get_result()
values = result.get_separated()
labels = result.get_labels()
self.result_view.clear()
self.result_view.setColumnCount(len(values) + 1)
self.result_view.setRowCount(len(labels))
for i, val in enumerate(labels):
self.result_view.setItem(i, 0, QTableWidgetItem(val))
for j, values_list in enumerate(values):
for i, val in enumerate(values_list):
self.result_view.setItem(i, j + 1, QTableWidgetItem(str(val)))
def _clean_measurements(self):
selected = set()
for _ in range(self.measurement_layout.count() - 2):
# noinspection PyTypeChecker
chk: QCheckBox = self.measurement_layout.takeAt(2).widget()
if chk.isChecked():
selected.add(chk.text())
chk.deleteLater()
return selected
def event(self, event: QEvent) -> bool:
if event.type() == QEvent.WindowActivate:
self.channel_select.change_channels_num(self.settings.image.channels)
selected = self._clean_measurements()
for val in MEASUREMENT_DICT.values():
area = val.get_starting_leaf().area
pc = val.get_starting_leaf().per_component
if (
val.get_fields()
or (area is not None and area != AreaType.ROI)
or (pc is not None and pc != PerComponent.Yes)
):
continue
text = val.get_name()
chk = QCheckBox(text)
if text in selected:
chk.setChecked(True)
self.measurement_layout.addWidget(chk)
return super().event(event)
def change_units(self):
self.settings.set("simple_measurements.units", self.units_select.get_value())
class Gui(QWidget):
"""This Gui takes a napari as parameter and infiltrates it.
It adds some buttons for categories of operations.
"""
# I don't like global variables.
# But that's what it is.
# It's a global variable.
# haesleinhuepf
global_last_filter_applied = None
def __init__(self, viewer):
super().__init__()
self.viewer = viewer
self.items = []
self.layout = QVBoxLayout()
self._init_gui()
self.setLayout(self.layout)
self.dock_widget = None
def _init_gui(self, main_menu: bool = True):
"""Switches the GUI internally between a main menu
where you can select categories and a sub menu where
you can keep results or cancel processing.
"""
# remove all buttons first
for i in reversed(range(self.layout.count())):
self.layout.itemAt(i).widget().setParent(None)
if main_menu:
self._add_button("Filter", self._add_filter_clicked)
self._add_button("Binarize", self._add_binarize_clicked)
self._add_button("Combine", self._add_combine_clicked)
self._add_button("Label", self._add_label_clicked)
self._add_button("Measure", self._measure_clicked)
else:
self._add_button("Done", self._done_clicked)
self._add_button("Cancel", self._cancel_clicked)
self.setLayout(self.layout)
def _add_button(self, title: str, handler: callable):
btn = QPushButton(title, self)
btn.clicked.connect(handler)
self.layout.addWidget(btn)
self.items.append(btn)
def _add_filter_clicked(self):
self._activate(filter)
def _add_binarize_clicked(self):
self._activate(binarize)
def _add_combine_clicked(self):
self._activate(combine)
def _add_label_clicked(self):
self._activate(label)
def _measure_clicked(self):
self._activate(measure)
def _activate(self, magicgui):
for layer in viewer.layers:
layer.visible = False
Gui.global_last_filter_applied = None
self.filter_gui = magicgui.Gui()
self.dock_widget = viewer.window.add_dock_widget(self.filter_gui,
area='right')
self._init_gui(False)
def _done_clicked(self):
# magicqui somehow internally keeps the layer.
# Thus, we need to destroy magicguis layer and add it again
if Gui.global_last_filter_applied is not None:
data = viewer.layers.selected[0].data
viewer.layers.remove_selected()
if isinstance(Gui.global_last_filter_applied, Label):
viewer.add_labels(data,
name=str(Gui.global_last_filter_applied))
else:
viewer.add_image(data,
name=str(Gui.global_last_filter_applied))
self.viewer.window.remove_dock_widget(self.dock_widget)
self._init_gui(True)
def _cancel_clicked(self):
if Gui.global_last_filter_applied is not None:
viewer.layers.remove_selected()
print("Main menu")
self.viewer.window.remove_dock_widget(self.dock_widget)
self._init_gui(True)
class QtLayerList(QScrollArea):
def __init__(self, layers):
super().__init__()
self.layers = layers
self.setWidgetResizable(True)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
scrollWidget = QWidget()
self.setWidget(scrollWidget)
self.vbox_layout = QVBoxLayout(scrollWidget)
self.vbox_layout.addWidget(QtDivider())
self.vbox_layout.addStretch(1)
self.vbox_layout.setContentsMargins(0, 0, 0, 0)
self.vbox_layout.setSpacing(2)
self.centers = []
# Create a timer to be used for autoscrolling the layers list up and
# down when dragging a layer near the end of the displayed area
self.dragTimer = QTimer()
self.dragTimer.setSingleShot(False)
self.dragTimer.setInterval(20)
self.dragTimer.timeout.connect(self._force_scroll)
self._scroll_up = True
self._min_scroll_region = 24
self.setAcceptDrops(True)
self.setToolTip('Layer list')
self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding)
self.layers.events.added.connect(self._add)
self.layers.events.removed.connect(self._remove)
self.layers.events.reordered.connect(self._reorder)
self.drag_start_position = np.zeros(2)
self.drag_name = None
def _add(self, event):
"""Insert widget for layer `event.item` at index `event.index`."""
layer = event.item
total = len(self.layers)
index = 2 * (total - event.index) - 1
widget = QtLayerWidget(layer)
self.vbox_layout.insertWidget(index, widget)
self.vbox_layout.insertWidget(index + 1, QtDivider())
layer.events.select.connect(self._scroll_on_select)
def _remove(self, event):
"""Remove widget for layer at index `event.index`."""
layer_index = event.index
total = len(self.layers)
# Find property widget and divider for layer to be removed
index = 2 * (total - layer_index) + 1
widget = self.vbox_layout.itemAt(index).widget()
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(widget)
widget.deleteLater()
self.vbox_layout.removeWidget(divider)
divider.deleteLater()
def _reorder(self, event=None):
"""Reorders list of layer widgets by looping through all
widgets in list sequentially removing them and inserting
them into the correct place in final list.
"""
total = len(self.layers)
# Create list of the current property and divider widgets
widgets = [
self.vbox_layout.itemAt(i + 1).widget() for i in range(2 * total)
]
# Take every other widget to ignore the dividers and get just the
# property widgets
indices = [
self.layers.index(w.layer)
for i, w in enumerate(widgets)
if i % 2 == 0
]
# Move through the layers in order
for i in range(total):
# Find index of property widget in list of the current layer
index = 2 * indices.index(i)
widget = widgets[index]
divider = widgets[index + 1]
# Check if current index does not match new index
index_current = self.vbox_layout.indexOf(widget)
index_new = 2 * (total - i) - 1
if index_current != index_new:
# Remove that property widget and divider
self.vbox_layout.removeWidget(widget)
self.vbox_layout.removeWidget(divider)
# Insert the property widget and divider into new location
self.vbox_layout.insertWidget(index_new, widget)
self.vbox_layout.insertWidget(index_new + 1, divider)
def _force_scroll(self):
"""Force the scroll bar to automattically scroll either up or down."""
cur_value = self.verticalScrollBar().value()
if self._scroll_up:
new_value = cur_value - self.verticalScrollBar().singleStep() / 4
if new_value < 0:
new_value = 0
self.verticalScrollBar().setValue(new_value)
else:
new_value = cur_value + self.verticalScrollBar().singleStep() / 4
if new_value > self.verticalScrollBar().maximum():
new_value = self.verticalScrollBar().maximum()
self.verticalScrollBar().setValue(new_value)
def _scroll_on_select(self, event):
"""Scroll to ensure that the currently selected layer is visible."""
layer = event.source
self._ensure_visible(layer)
def _ensure_visible(self, layer):
"""Ensure layer widget for at particular layer is visible."""
total = len(self.layers)
layer_index = self.layers.index(layer)
# Find property widget and divider for layer to be removed
index = 2 * (total - layer_index) - 1
widget = self.vbox_layout.itemAt(index).widget()
self.ensureWidgetVisible(widget)
def keyPressEvent(self, event):
event.ignore()
def keyReleaseEvent(self, event):
event.ignore()
def mousePressEvent(self, event):
# Check if mouse press happens on a layer properties widget or
# a child of such a widget. If not, the press has happended on the
# Layers Widget itself and should be ignored.
widget = self.childAt(event.pos())
layer = (
getattr(widget, 'layer', None)
or getattr(widget.parentWidget(), 'layer', None)
or getattr(widget.parentWidget().parentWidget(), 'layer', None)
)
if layer is not None:
self.drag_start_position = np.array(
[event.pos().x(), event.pos().y()]
)
self.drag_name = layer.name
else:
self.drag_name = None
def mouseReleaseEvent(self, event):
if self.drag_name is None:
# Unselect all the layers if not dragging a layer
self.layers.unselect_all()
return
modifiers = event.modifiers()
layer = self.layers[self.drag_name]
if modifiers == Qt.ShiftModifier:
# If shift select all layers in between currently selected one and
# clicked one
index = self.layers.index(layer)
lastSelected = None
for i in range(len(self.layers)):
if self.layers[i].selected:
lastSelected = i
r = [index, lastSelected]
r.sort()
for i in range(r[0], r[1] + 1):
self.layers[i].selected = True
elif modifiers == Qt.ControlModifier:
# If control click toggle selected state
layer.selected = not layer.selected
else:
# If otherwise unselect all and leave clicked one selected
self.layers.unselect_all(ignore=layer)
layer.selected = True
def mouseMoveEvent(self, event):
position = np.array([event.pos().x(), event.pos().y()])
distance = np.linalg.norm(position - self.drag_start_position)
if (
distance < QApplication.startDragDistance()
or self.drag_name is None
):
return
mimeData = QMimeData()
mimeData.setText(self.drag_name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.exec_()
if self.drag_name is not None:
index = self.layers.index(self.drag_name)
layer = self.layers[index]
self._ensure_visible(layer)
def dragLeaveEvent(self, event):
"""Unselects layer dividers."""
event.ignore()
self.dragTimer.stop()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dragEnterEvent(self, event):
if event.source() == self:
event.accept()
divs = []
for i in range(0, self.vbox_layout.count(), 2):
widget = self.vbox_layout.itemAt(i).widget()
divs.append(widget.y() + widget.frameGeometry().height() / 2)
self.centers = [
(divs[i + 1] + divs[i]) / 2 for i in range(len(divs) - 1)
]
else:
event.ignore()
def dragMoveEvent(self, event):
"""Set the appropriate layers list divider to be highlighted when
dragging a layer to a new position in the layers list.
"""
max_height = self.frameGeometry().height()
if (
event.pos().y() < self._min_scroll_region
and not self.dragTimer.isActive()
):
self._scroll_up = True
self.dragTimer.start()
elif (
event.pos().y() > max_height - self._min_scroll_region
and not self.dragTimer.isActive()
):
self._scroll_up = False
self.dragTimer.start()
elif (
self.dragTimer.isActive()
and event.pos().y() >= self._min_scroll_region
and event.pos().y() <= max_height - self._min_scroll_region
):
self.dragTimer.stop()
# Determine which widget center is the mouse currently closed to
cord = event.pos().y() + self.verticalScrollBar().value()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
# Determine the current location of the widget being dragged
total = self.vbox_layout.count() // 2 - 1
insert = total - divider_index
index = self.layers.index(self.drag_name)
# If the widget being dragged hasn't moved above or below any other
# widgets then don't highlight any dividers
selected = not (insert == index) and not (insert - 1 == index)
# Set the selected state of all the dividers
for i in range(0, self.vbox_layout.count(), 2):
if i == 2 * divider_index:
self.vbox_layout.itemAt(i).widget().setSelected(selected)
else:
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dropEvent(self, event):
if self.dragTimer.isActive():
self.dragTimer.stop()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
cord = event.pos().y() + self.verticalScrollBar().value()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
total = self.vbox_layout.count() // 2 - 1
insert = total - divider_index
index = self.layers.index(self.drag_name)
if index != insert and index + 1 != insert:
if insert >= index:
insert -= 1
self.layers.move_selected(index, insert)
event.accept()
class QtLayerList(QScrollArea):
"""Widget storing a list of all the layers present in the current window.
Parameters
----------
layers : napari.components.LayerList
The layer list to track and display.
Attributes
----------
centers : list
List of layer widgets center coordinates.
layers : napari.components.LayerList
The layer list to track and display.
vbox_layout : QVBoxLayout
The layout instance in which the layouts appear.
"""
def __init__(self, layers: 'LayerList'):
super().__init__()
self.layers = layers
self.setAttribute(Qt.WA_DeleteOnClose)
self.setWidgetResizable(True)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
scrollWidget = QWidget()
self.setWidget(scrollWidget)
self.vbox_layout = QVBoxLayout(scrollWidget)
self.vbox_layout.addWidget(QtDivider())
self.vbox_layout.addStretch(1)
self.vbox_layout.setContentsMargins(0, 0, 0, 0)
self.vbox_layout.setSpacing(2)
self.centers = []
# Create a timer to be used for autoscrolling the layers list up and
# down when dragging a layer near the end of the displayed area
self._drag_timer = QTimer()
self._drag_timer.setSingleShot(False)
self._drag_timer.setInterval(20)
self._drag_timer.timeout.connect(self._force_scroll)
self._scroll_up = True
self._min_scroll_region = 24
self.setAcceptDrops(True)
self.setToolTip(trans._('Layer list'))
self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding)
self.layers.events.inserted.connect(self._add)
self.layers.events.removed.connect(self._remove)
self.layers.events.reordered.connect(self._reorder)
self.layers.selection.events.changed.connect(self._on_selection_change)
self._drag_start_position = np.zeros(2)
self._drag_name = None
self.chunk_receiver = _create_chunk_receiver(self)
def _on_selection_change(self, event):
for layer in event.added:
w = self._find_widget(layer)
if w:
w.setSelected(True)
for layer in event.removed:
w = self._find_widget(layer)
if w:
w.setSelected(False)
if event.added:
self._ensure_visible(list(event.added)[-1])
def _find_widget(self, layer):
for i in range(self.vbox_layout.count()):
w = self.vbox_layout.itemAt(i).widget()
if getattr(w, 'layer', None) == layer:
return w
def _add(self, event):
"""Insert widget for layer `event.value` at index `event.index`.
Parameters
----------
event : napari.utils.event.Event
The napari event that triggered this method.
"""
layer = event.value
total = len(self.layers)
index = 2 * (total - event.index) - 1
widget = QtLayerWidget(layer, selected=layer in self.layers.selection)
self.vbox_layout.insertWidget(index, widget)
self.vbox_layout.insertWidget(index + 1, QtDivider())
def _remove(self, event):
"""Remove widget for layer at index `event.index`.
Parameters
----------
event : napari.utils.event.Event
The napari event that triggered this method.
"""
layer_index = event.index
total = len(self.layers)
# Find property widget and divider for layer to be removed
index = 2 * (total - layer_index) + 1
widget = self.vbox_layout.itemAt(index).widget()
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(widget)
disconnect_events(widget.layer.events, self)
widget.close()
self.vbox_layout.removeWidget(divider)
divider.deleteLater()
def _reorder(self, event=None):
"""Reorder list of layer widgets.
Loops through all widgets in list, sequentially removing them
and inserting them into the correct place in the final list.
Parameters
----------
event : napari.utils.event.Event, optional
The napari event that triggered this method.
"""
total = len(self.layers)
# Create list of the current property and divider widgets
widgets = [
self.vbox_layout.itemAt(i + 1).widget() for i in range(2 * total)
]
# Take every other widget to ignore the dividers and get just the
# property widgets
indices = [
self.layers.index(w.layer)
for i, w in enumerate(widgets)
if i % 2 == 0
]
# Move through the layers in order
for i in range(total):
# Find index of property widget in list of the current layer
index = 2 * indices.index(i)
widget = widgets[index]
divider = widgets[index + 1]
# Check if current index does not match new index
index_current = self.vbox_layout.indexOf(widget)
index_new = 2 * (total - i) - 1
if index_current != index_new:
# Remove that property widget and divider
self.vbox_layout.removeWidget(widget)
self.vbox_layout.removeWidget(divider)
# Insert the property widget and divider into new location
self.vbox_layout.insertWidget(index_new, widget)
self.vbox_layout.insertWidget(index_new + 1, divider)
def _force_scroll(self):
"""Force the scroll bar to automattically scroll either up or down."""
cur_value = self.verticalScrollBar().value()
if self._scroll_up:
new_value = cur_value - self.verticalScrollBar().singleStep() / 4
if new_value < 0:
new_value = 0
self.verticalScrollBar().setValue(new_value)
else:
new_value = cur_value + self.verticalScrollBar().singleStep() / 4
if new_value > self.verticalScrollBar().maximum():
new_value = self.verticalScrollBar().maximum()
self.verticalScrollBar().setValue(new_value)
def _ensure_visible(self, layer):
"""Ensure layer widget for at particular layer is visible.
Parameters
----------
layer : napari.layers.Layer
An instance of a napari layer.
"""
total = len(self.layers)
layer_index = self.layers.index(layer)
# Find property widget and divider for layer to be removed
index = 2 * (total - layer_index) - 1
widget = self.vbox_layout.itemAt(index).widget()
self.ensureWidgetVisible(widget)
def keyPressEvent(self, event):
"""Ignore a key press event.
Allows the event to pass through a parent widget to its child widget
without doing anything. If we did not use event.ignore() then the
parent widget would catch the event and not pass it on to the child.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
event.ignore()
def keyReleaseEvent(self, event):
"""Ignore key release event.
Allows the event to pass through a parent widget to its child widget
without doing anything. If we did not use event.ignore() then the
parent widget would catch the event and not pass it on to the child.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
event.ignore()
def mousePressEvent(self, event):
"""Register mouse click if it happens on a layer widget.
Checks if mouse press happens on a layer properties widget or
a child of such a widget. If not, the press has happened on the
Layers Widget itself and should be ignored.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
widget = self.childAt(event.pos())
layer = (
getattr(widget, 'layer', None)
or getattr(widget.parentWidget(), 'layer', None)
or getattr(widget.parentWidget().parentWidget(), 'layer', None)
)
if layer is not None:
self._drag_start_position = np.array(
[event.pos().x(), event.pos().y()]
)
self._drag_name = layer.name
else:
self._drag_name = None
def mouseReleaseEvent(self, event):
"""Select layer using mouse click.
Key modifiers:
Shift - If the Shift button is pressed, select all layers in between
currently selected one and the clicked one.
Control - If the Control button is pressed, mouse click will
toggle selected state of the layer.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
if self._drag_name is None:
# Unselect all the layers if not dragging a layer
self.layers.selection.active = None
return
modifiers = event.modifiers()
clicked_layer = self.layers[self._drag_name]
if modifiers == Qt.ShiftModifier and self.layers.selection._current:
# shift-click: select all layers between current and clicked
clicked = self.layers.index(clicked_layer)
current = self.layers.index(self.layers.selection._current)
from_, to_ = sorted([clicked, current])
_to_select = self.layers[slice(from_, to_ + 1)] # inclusive range
self.layers.selection.update(_to_select)
self.layers.selection._current = clicked_layer
elif modifiers == Qt.ControlModifier:
# If control click toggle selected state of clicked layer
self.layers.selection.toggle(clicked_layer)
else:
# If otherwise unselect all and leave clicked one selected
self.layers.selection.active = clicked_layer
def mouseMoveEvent(self, event):
"""Drag and drop layer with mouse movement.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
position = np.array([event.pos().x(), event.pos().y()])
distance = np.linalg.norm(position - self._drag_start_position)
if (
distance < QApplication.startDragDistance()
or self._drag_name is None
):
return
mimeData = QMimeData()
mimeData.setText(self._drag_name)
drag = QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.exec_()
# Check if dragged layer still exists or was deleted during drag
names = [layer.name for layer in self.layers]
dragged_layer_exists = self._drag_name in names
if self._drag_name is not None and dragged_layer_exists:
index = self.layers.index(self._drag_name)
layer = self.layers[index]
self._ensure_visible(layer)
def dragLeaveEvent(self, event):
"""Unselects layer dividers.
Allows the event to pass through a parent widget to its child widget
without doing anything. If we did not use event.ignore() then the
parent widget would catch the event and not pass it on to the child.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
event.ignore()
self._drag_timer.stop()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dragEnterEvent(self, event):
"""Update divider position before dragging layer widget to new position
Allows the event to pass through a parent widget to its child widget
without doing anything. If we did not use event.ignore() then the
parent widget would catch the event and not pass it on to the child.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
if event.source() == self:
event.accept()
divs = []
for i in range(0, self.vbox_layout.count(), 2):
widget = self.vbox_layout.itemAt(i).widget()
divs.append(widget.y() + widget.frameGeometry().height() / 2)
self.centers = [
(divs[i + 1] + divs[i]) / 2 for i in range(len(divs) - 1)
]
else:
event.ignore()
def dragMoveEvent(self, event):
"""Highlight appriate divider when dragging layer to new position.
Sets the appropriate layers list divider to be highlighted when
dragging a layer to a new position in the layers list.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
max_height = self.frameGeometry().height()
if (
event.pos().y() < self._min_scroll_region
and not self._drag_timer.isActive()
):
self._scroll_up = True
self._drag_timer.start()
elif (
event.pos().y() > max_height - self._min_scroll_region
and not self._drag_timer.isActive()
):
self._scroll_up = False
self._drag_timer.start()
elif (
self._drag_timer.isActive()
and event.pos().y() >= self._min_scroll_region
and event.pos().y() <= max_height - self._min_scroll_region
):
self._drag_timer.stop()
# Determine which widget center is the mouse currently closed to
cord = event.pos().y() + self.verticalScrollBar().value()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
# Determine the current location of the widget being dragged
total = self.vbox_layout.count() // 2 - 1
insert = total - divider_index
index = self.layers.index(self._drag_name)
# If the widget being dragged hasn't moved above or below any other
# widgets then don't highlight any dividers
selected = not (insert == index) and not (insert - 1 == index)
# Set the selected state of all the dividers
for i in range(0, self.vbox_layout.count(), 2):
if i == 2 * divider_index:
self.vbox_layout.itemAt(i).widget().setSelected(selected)
else:
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dropEvent(self, event):
"""Drop dragged layer widget into new position in the list of layers.
Parameters
----------
event : qtpy.QtCore.QEvent
Event from the Qt context.
"""
if self._drag_timer.isActive():
self._drag_timer.stop()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
cord = event.pos().y() + self.verticalScrollBar().value()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
total = self.vbox_layout.count() // 2 - 1
insert = total - divider_index
index = self.layers.index(self._drag_name)
if index != insert and index + 1 != insert:
if insert >= index:
insert -= 1
self.layers.move_selected(index, insert)
event.accept()
class QtLayers(QScrollArea):
def __init__(self, layers):
super().__init__()
self.layers = layers
self.setWidgetResizable(True)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
scrollWidget = QWidget()
self.setWidget(scrollWidget)
self.vbox_layout = QVBoxLayout(scrollWidget)
self.vbox_layout.addWidget(QtDivider())
self.vbox_layout.addStretch(1)
self.vbox_layout.setContentsMargins(0, 0, 0, 0)
self.centers = []
self.setAcceptDrops(True)
self.setToolTip('Layer list')
self.layers.events.added.connect(self._add)
self.layers.events.removed.connect(self._remove)
self.layers.events.reordered.connect(self._reorder)
def _add(self, event):
"""Insert `event.widget` at index `event.index`."""
layer = event.item
index = event.index
total = len(self.layers)
if layer._qt_properties is not None:
self.vbox_layout.insertWidget(2 * (total - index) - 1,
layer._qt_properties)
self.vbox_layout.insertWidget(2 * (total - index), QtDivider())
def _remove(self, event):
"""Remove layer widget at index `event.index`."""
layer = event.item
if layer._qt_properties is not None:
index = self.vbox_layout.indexOf(layer._qt_properties)
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(layer._qt_properties)
layer._qt_properties.deleteLater()
layer._qt_properties = None
self.vbox_layout.removeWidget(divider)
divider.deleteLater()
divider = None
def _reorder(self, event):
"""Reorders list of layer widgets by looping through all
widgets in list sequentially removing them and inserting
them into the correct place in final list.
"""
total = len(self.layers)
for i in range(total):
layer = self.layers[i]
if layer._qt_properties is not None:
index = self.vbox_layout.indexOf(layer._qt_properties)
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(layer._qt_properties)
self.vbox_layout.removeWidget(divider)
self.vbox_layout.insertWidget(2 * (total - i) - 1,
layer._qt_properties)
self.vbox_layout.insertWidget(2 * (total - i), divider)
def mouseReleaseEvent(self, event):
"""Unselects all layer widgets."""
self.layers.unselect_all()
def dragLeaveEvent(self, event):
"""Unselects layer dividers."""
event.ignore()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dragEnterEvent(self, event):
event.accept()
divs = []
for i in range(0, self.vbox_layout.count(), 2):
widget = self.vbox_layout.itemAt(i).widget()
divs.append(widget.y() + widget.frameGeometry().height() / 2)
self.centers = [(divs[i + 1] + divs[i]) / 2
for i in range(len(divs) - 1)]
def dragMoveEvent(self, event):
"""Set the appropriate layers list divider to be highlighted when
dragging a layer to a new position in the layers list.
"""
# Determine which widget center is the mouse currently closed to
cord = event.pos().y()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
# Determine the current location of the widget being dragged
layerWidget = event.source()
total = self.vbox_layout.count() // 2 - 1
index = total - self.vbox_layout.indexOf(layerWidget) // 2 - 1
insert = total - divider_index
# If the widget being dragged hasn't moved above or below any other
# widgets then don't highlight any dividers
selected = (not (insert == index) and not (insert - 1 == index))
# Set the selected state of all the dividers
for i in range(0, self.vbox_layout.count(), 2):
if i == 2 * divider_index:
self.vbox_layout.itemAt(i).widget().setSelected(selected)
else:
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dropEvent(self, event):
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
cord = event.pos().y()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
layerWidget = event.source()
total = self.vbox_layout.count() // 2 - 1
index = total - self.vbox_layout.indexOf(layerWidget) // 2 - 1
insert = total - divider_index
if index != insert and index + 1 != insert:
if not self.layers[index].selected:
self.layers.unselect_all()
self.layers[index].selected = True
self.layers._move_layers(index, insert)
event.accept()
class SimpleMeasurements(QWidget):
def __init__(self, settings: StackSettings, parent=None):
super().__init__(parent)
self.settings = settings
self.calculate_btn = QPushButton("Calculate")
self.calculate_btn.clicked.connect(self.calculate)
self.result_view = QTableWidget()
self.channel_select = ChannelComboBox()
self.units_select = QEnumComboBox(enum_class=Units)
self.units_select.setCurrentEnum(
self.settings.get("simple_measurements.units", Units.nm))
self.units_select.currentIndexChanged.connect(self.change_units)
self._shift = 2
layout = QHBoxLayout()
self.measurement_layout = QVBoxLayout()
l1 = QHBoxLayout()
l1.addWidget(QLabel("Units"))
l1.addWidget(self.units_select)
self.measurement_layout.addLayout(l1)
l2 = QHBoxLayout()
l2.addWidget(QLabel("Channel"))
l2.addWidget(self.channel_select)
self.measurement_layout.addLayout(l2)
layout.addLayout(self.measurement_layout)
result_layout = QVBoxLayout()
result_layout.addWidget(self.result_view)
result_layout.addWidget(self.calculate_btn)
layout.addLayout(result_layout)
self.setLayout(layout)
self.setWindowTitle("Measurement")
if self.window() == self:
with suppress(KeyError):
geometry = self.settings.get_from_profile(
"simple_measurement_window_geometry")
self.restoreGeometry(
QByteArray.fromHex(bytes(geometry, "ascii")))
def closeEvent(self, event: QCloseEvent) -> None:
"""
Save geometry if widget is used as standalone window.
"""
if self.window() == self:
self.settings.set_in_profile(
"simple_measurement_window_geometry",
self.saveGeometry().toHex().data().decode("ascii"))
super().closeEvent(event)
def calculate(self):
if self.settings.roi is None:
QMessageBox.warning(self, "No segmentation",
"need segmentation to work")
return
to_calculate = []
for i in range(self._shift, self.measurement_layout.count()):
# noinspection PyTypeChecker
chk: QCheckBox = self.measurement_layout.itemAt(i).widget()
if chk.isChecked():
leaf: Leaf = MEASUREMENT_DICT[chk.text()].get_starting_leaf()
to_calculate.append(
leaf.replace_(per_component=PerComponent.Yes,
area=AreaType.ROI))
if not to_calculate:
QMessageBox.warning(self, "No measurement",
"Select at least one measurement")
return
profile = MeasurementProfile(
"", [MeasurementEntry(x.name, x) for x in to_calculate])
dial = ExecuteFunctionDialog(
profile.calculate,
kwargs={
"image": self.settings.image,
"channel_num": self.channel_select.get_value(),
"roi": self.settings.roi_info,
"result_units": self.units_select.currentEnum(),
},
)
dial.exec_()
result: MeasurementResult = dial.get_result()
values = result.get_separated()
labels = result.get_labels()
self.result_view.clear()
self.result_view.setColumnCount(len(values) + 1)
self.result_view.setRowCount(len(labels))
for i, val in enumerate(labels):
self.result_view.setItem(i, 0, QTableWidgetItem(val))
for j, values_list in enumerate(values):
for i, val in enumerate(values_list):
self.result_view.setItem(i, j + 1, QTableWidgetItem(str(val)))
def _clean_measurements(self):
selected = set()
for _ in range(self.measurement_layout.count() - self._shift):
# noinspection PyTypeChecker
chk: QCheckBox = self.measurement_layout.takeAt(
self._shift).widget()
if chk.isChecked():
selected.add(chk.text())
chk.deleteLater()
return selected
def refresh_measurements(self):
selected = self._clean_measurements()
for val in MEASUREMENT_DICT.values():
area = val.get_starting_leaf().area
pc = val.get_starting_leaf().per_component
if (val.get_fields() or (area is not None and area != AreaType.ROI)
or (pc is not None and pc != PerComponent.Yes)):
continue
text = val.get_name()
chk = QCheckBox(text)
if text in selected:
chk.setChecked(True)
self.measurement_layout.addWidget(chk)
def keyPressEvent(self, e: QKeyEvent):
if not e.modifiers() & Qt.ControlModifier:
return
selected = self.result_view.selectedRanges()
if e.key() == Qt.Key_C: # copy
s = ""
for r in range(selected[0].topRow(), selected[0].bottomRow() + 1):
for c in range(selected[0].leftColumn(),
selected[0].rightColumn() + 1):
try:
s += str(self.result_view.item(r, c).text()) + "\t"
except AttributeError:
s += "\t"
s = s[:-1] + "\n" # eliminate last '\t'
QApplication.clipboard().setText(s)
def event(self, event: QEvent) -> bool:
if event.type() == QEvent.WindowActivate:
if self.settings.image is not None:
self.channel_select.change_channels_num(
self.settings.image.channels)
self.refresh_measurements()
return super().event(event)
def change_units(self):
self.settings.set("simple_measurements.units",
self.units_select.currentEnum())
class MultiView(QWidget):
signalSyncSlices = Signal(int)
signalAxisChanged = Signal(int)
def __init__(self,
views=None,
data=None,
labels=None,
layout="horizontal",
parent=None,
**kwargs):
super(MultiView, self).__init__(parent, **kwargs)
self.parent = parent
if layout == "horizontal":
self.layout = QHBoxLayout(self)
elif layout == "vertical":
self.layout = QVBoxLayout(self)
else:
raise ValueError("layout must be 'horizontal' or 'vertical'.")
self.views = []
if views is not None:
for view in views:
self.addView(view)
if data is not None:
if data.ndim not in (3, 4):
raise IndexError("Dimensionality of data must be 3 or 4.")
if data.ndim == 3: data = data[np.newaxis, ...]
for ax in range(data.shape[0]):
current_label = labels[ax] if labels is not None else None
self.addView(
InteractionVolumeView(data=data[ax], label=current_label))
def addView(self, view):
self.views.append(view)
self.layout.addWidget(view)
if hasattr(view, "signalAxisChanged"):
view.signalAxisChanged.connect(self.on_signalAxisChanged)
if hasattr(view, "signalSyncSlices"):
view.signalSyncSlices.connect(self.on_signalSyncSlices)
def removeView(self, view):
if isinstance(view, int):
self.layout.itemAt(view).widget().setParent(None)
self.views[view].deleteLater()
else:
for i, oldView in enumerate(self.views):
if view == oldView:
self.removeView(i)
break
def setAxis(self, axis):
for view in self.views:
view.setAxis(axis)
def setSlice(self, slice_):
for view in self.views:
view.setSlice(slice_)
def __getitem__(self, idx):
return self.views[idx]
def on_signalAxisChanged(self, axis):
self.setAxis(axis)
self.signalAxisChanged.emit(axis)
def on_signalSyncSlices(self, slice_):
self.setSlice(slice_)
self.signalSyncSlices.emit(slice_)
class QtLayersList(QScrollArea):
def __init__(self, layers):
super().__init__()
self.layers = layers
self.setWidgetResizable(True)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
scrollWidget = QWidget()
self.setWidget(scrollWidget)
self.vbox_layout = QVBoxLayout(scrollWidget)
self.vbox_layout.addWidget(QtDivider())
self.vbox_layout.addStretch(1)
self.vbox_layout.setContentsMargins(0, 0, 0, 0)
self.centers = []
self.setAcceptDrops(True)
self.setToolTip('Layer list')
self.layers.events.added.connect(self._add)
self.layers.events.removed.connect(self._remove)
self.layers.events.reordered.connect(self._reorder)
def _add(self, event):
"""Inserts a layer widget at a specific index
"""
layer = event.item
index = event.index
total = len(self.layers)
if layer._qt_properties is not None:
self.vbox_layout.insertWidget(2 * (total - index) - 1,
layer._qt_properties)
self.vbox_layout.insertWidget(2 * (total - index), QtDivider())
def _remove(self, event):
"""Removes a layer widget
"""
layer = event.item
if layer._qt_properties is not None:
index = self.vbox_layout.indexOf(layer._qt_properties)
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(layer._qt_properties)
layer._qt_properties.deleteLater()
layer._qt_properties = None
self.vbox_layout.removeWidget(divider)
divider.deleteLater()
divider = None
def _reorder(self, event):
"""Reorders list of layer widgets by looping through all
widgets in list sequentially removing them and inserting
them into the correct place in final list.
"""
total = len(self.layers)
for i in range(total):
layer = self.layers[i]
if layer._qt_properties is not None:
index = self.vbox_layout.indexOf(layer._qt_properties)
divider = self.vbox_layout.itemAt(index + 1).widget()
self.vbox_layout.removeWidget(layer._qt_properties)
self.vbox_layout.removeWidget(divider)
self.vbox_layout.insertWidget(2 * (total - i) - 1,
layer._qt_properties)
self.vbox_layout.insertWidget(2 * (total - i), divider)
def mouseReleaseEvent(self, event):
"""Unselects all layer widgets
"""
self.layers.unselect_all()
def dragLeaveEvent(self, event):
"""Unselects layer dividers
"""
event.ignore()
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dragEnterEvent(self, event):
event.accept()
divs = []
for i in range(0, self.vbox_layout.count(), 2):
widget = self.vbox_layout.itemAt(i).widget()
divs.append(widget.y() + widget.frameGeometry().height() / 2)
self.centers = [(divs[i + 1] + divs[i]) / 2
for i in range(len(divs) - 1)]
def dragMoveEvent(self, event):
cord = event.pos().y()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
layerWidget = event.source()
total = self.vbox_layout.count() // 2 - 1
index = total - self.vbox_layout.indexOf(layerWidget) // 2 - 1
insert = total - divider_index
if not (insert == index) and not (insert - 1 == index):
state = True
else:
state = False
for i in range(0, self.vbox_layout.count(), 2):
if i == 2 * divider_index:
self.vbox_layout.itemAt(i).widget().setSelected(state)
else:
self.vbox_layout.itemAt(i).widget().setSelected(False)
def dropEvent(self, event):
for i in range(0, self.vbox_layout.count(), 2):
self.vbox_layout.itemAt(i).widget().setSelected(False)
cord = event.pos().y()
center_list = (i for i, x in enumerate(self.centers) if x > cord)
divider_index = next(center_list, len(self.centers))
layerWidget = event.source()
total = self.vbox_layout.count() // 2 - 1
index = total - self.vbox_layout.indexOf(layerWidget) // 2 - 1
insert = total - divider_index
if index != insert and index + 1 != insert:
if not self.layers[index].selected:
self.layers.unselect_all()
self.layers[index].selected = True
self.layers._move_layers(index, insert)
event.accept()