def showPopup(self):
# type: () -> None
"""
Reimplemented from QComboBox.showPopup
Popup up a customized view and filter edit line.
Note
----
The .popup(), .lineEdit(), .completer() of the base class are not used.
"""
if self.__popup is not None:
# We have user entered state that cannot be disturbed
# (entered filter text, scroll offset, ...)
return # pragma: no cover
if self.count() == 0:
return
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
popup = QListView(
uniformItemSizes=True,
horizontalScrollBarPolicy=Qt.ScrollBarAlwaysOff,
verticalScrollBarPolicy=Qt.ScrollBarAsNeeded,
iconSize=self.iconSize(),
)
popup.setFocusProxy(self.__searchline)
popup.setParent(self, Qt.Popup | Qt.FramelessWindowHint)
popup.setItemDelegate(_ComboBoxListDelegate(popup))
proxy = QSortFilterProxyModel(
popup, filterCaseSensitivity=Qt.CaseInsensitive
)
proxy.setFilterKeyColumn(self.modelColumn())
proxy.setSourceModel(self.model())
popup.setModel(proxy)
root = proxy.mapFromSource(self.rootModelIndex())
popup.setRootIndex(root)
self.__popup = popup
self.__proxy = proxy
self.__searchline.setText("")
self.__searchline.setPlaceholderText("Filter...")
self.__searchline.setVisible(True)
self.__searchline.textEdited.connect(proxy.setFilterFixedString)
style = self.style() # type: QStyle
popuprect_origin = style.subControlRect(
QStyle.CC_ComboBox, opt, QStyle.SC_ComboBoxListBoxPopup, self
) # type: QRect
popuprect_origin = QRect(
self.mapToGlobal(popuprect_origin.topLeft()),
popuprect_origin.size()
)
editrect = style.subControlRect(
QStyle.CC_ComboBox, opt, QStyle.SC_ComboBoxEditField, self
) # type: QRect
self.__searchline.setGeometry(editrect)
desktop = QApplication.desktop()
screenrect = desktop.availableGeometry(self) # type: QRect
# get the height for the view
listrect = QRect()
for i in range(min(proxy.rowCount(root), self.maxVisibleItems())):
index = proxy.index(i, self.modelColumn(), root)
if index.isValid():
listrect = listrect.united(popup.visualRect(index))
if listrect.height() >= screenrect.height():
break
window = popup.window() # type: QWidget
window.ensurePolished()
if window.layout() is not None:
window.layout().activate()
else:
QApplication.sendEvent(window, QEvent(QEvent.LayoutRequest))
margins = qwidget_margin_within(popup.viewport(), window)
height = (listrect.height() + 2 * popup.spacing() +
margins.top() + margins.bottom())
popup_size = (QSize(popuprect_origin.width(), height)
.expandedTo(window.minimumSize())
.boundedTo(window.maximumSize())
.boundedTo(screenrect.size()))
popuprect = QRect(popuprect_origin.bottomLeft(), popup_size)
popuprect = dropdown_popup_geometry(
popuprect, popuprect_origin, screenrect)
popup.setGeometry(popuprect)
current = proxy.mapFromSource(
self.model().index(self.currentIndex(), self.modelColumn(),
self.rootModelIndex()))
popup.setCurrentIndex(current)
popup.scrollTo(current, QAbstractItemView.EnsureVisible)
popup.show()
popup.setFocus(Qt.PopupFocusReason)
popup.installEventFilter(self)
popup.viewport().installEventFilter(self)
popup.viewport().setMouseTracking(True)
self.update()
self.__popupTimer.restart()
def showPopup(self):
# type: () -> None
"""
Reimplemented from QComboBox.showPopup
Popup up a customized view and filter edit line.
Note
----
The .popup(), .lineEdit(), .completer() of the base class are not used.
"""
if self.__popup is not None:
# We have user entered state that cannot be disturbed
# (entered filter text, scroll offset, ...)
return # pragma: no cover
if self.count() == 0:
return
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
popup = QListView(
uniformItemSizes=True,
horizontalScrollBarPolicy=Qt.ScrollBarAlwaysOff,
verticalScrollBarPolicy=Qt.ScrollBarAsNeeded,
iconSize=self.iconSize(),
)
popup.setFocusProxy(self.__searchline)
popup.setParent(self, Qt.Popup | Qt.FramelessWindowHint)
popup.setItemDelegate(_ComboBoxListDelegate(popup))
proxy = QSortFilterProxyModel(
popup, filterCaseSensitivity=Qt.CaseInsensitive
)
proxy.setFilterKeyColumn(self.modelColumn())
proxy.setSourceModel(self.model())
popup.setModel(proxy)
root = proxy.mapFromSource(self.rootModelIndex())
popup.setRootIndex(root)
self.__popup = popup
self.__proxy = proxy
self.__searchline.setText("")
self.__searchline.setPlaceholderText("Filter...")
self.__searchline.setVisible(True)
self.__searchline.textEdited.connect(proxy.setFilterFixedString)
style = self.style() # type: QStyle
popuprect_origin = style.subControlRect(
QStyle.CC_ComboBox, opt, QStyle.SC_ComboBoxListBoxPopup, self
) # type: QRect
popuprect_origin = QRect(
self.mapToGlobal(popuprect_origin.topLeft()),
popuprect_origin.size()
)
editrect = style.subControlRect(
QStyle.CC_ComboBox, opt, QStyle.SC_ComboBoxEditField, self
) # type: QRect
self.__searchline.setGeometry(editrect)
desktop = QApplication.desktop()
screenrect = desktop.availableGeometry(self) # type: QRect
# get the height for the view
listrect = QRect()
for i in range(min(proxy.rowCount(root), self.maxVisibleItems())):
index = proxy.index(i, self.modelColumn(), root)
if index.isValid():
listrect = listrect.united(popup.visualRect(index))
if listrect.height() >= screenrect.height():
break
window = popup.window() # type: QWidget
window.ensurePolished()
if window.layout() is not None:
window.layout().activate()
else:
QApplication.sendEvent(window, QEvent(QEvent.LayoutRequest))
margins = qwidget_margin_within(popup.viewport(), window)
height = (listrect.height() + 2 * popup.spacing() +
margins.top() + margins.bottom())
popup_size = (QSize(popuprect_origin.width(), height)
.expandedTo(window.minimumSize())
.boundedTo(window.maximumSize())
.boundedTo(screenrect.size()))
popuprect = QRect(popuprect_origin.bottomLeft(), popup_size)
popuprect = dropdown_popup_geometry(
popuprect, popuprect_origin, screenrect)
popup.setGeometry(popuprect)
current = proxy.mapFromSource(
self.model().index(self.currentIndex(), self.modelColumn(),
self.rootModelIndex()))
popup.setCurrentIndex(current)
popup.scrollTo(current, QAbstractItemView.EnsureVisible)
popup.show()
popup.setFocus(Qt.PopupFocusReason)
popup.installEventFilter(self)
popup.viewport().installEventFilter(self)
popup.viewport().setMouseTracking(True)
self.update()
self.__popupTimer.restart()
class LabelSelectionWidget(QWidget):
"""
A widget for selection of label values.
The widget displays the contents of the model with two widgets:
* The top level model items are displayed in a combo box.
* The children of the current selected top level item are
displayed in a subordinate list view.
.. note:: This is not a QAbstractItemView subclass.
"""
# Current group/root index has changed.
groupChanged = Signal(int)
# Selection for the current group/root has changed.
groupSelectionChanged = Signal(int)
def __init__(self):
super().__init__()
self.__model = None
self.__selectionMode = QListView.ExtendedSelection
self.__currentIndex = -1
self.__selections = {}
self.__parent = None
self.targets = []
layout = QVBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
def group_box(title):
box = QGroupBox(title)
box.setFlat(True)
lay = QVBoxLayout()
lay.setContentsMargins(0, 0, 0, 0)
box.setLayout(lay)
return box
self.labels_combo = QComboBox()
self.values_view = QListView(selectionMode=self.__selectionMode)
self.labels_combo.currentIndexChanged.connect(
self.__onCurrentIndexChanged)
l_box = group_box(self.tr("Label"))
v_box = group_box(self.tr("Values"))
l_box.layout().addWidget(self.labels_combo)
v_box.layout().addWidget(self.values_view)
layout.addWidget(l_box)
layout.addWidget(v_box)
self.setLayout(layout)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
def set_selection(self):
model = self.model()
# FIX: This assumes fixed target key/values order.
indices = [
model.index(i, 0, model.index(keyind, 0))
for keyind, selected in enumerate(self.__parent.stored_selections)
for i in selected
]
selection = itemselection(indices)
self.setCurrentGroupIndex(self.__parent.current_group_index)
self.setSelection(selection)
def selected_split(self):
group_index = self.currentGroupIndex()
if not (0 <= group_index < len(self.targets)):
return None, []
group = self.targets[group_index]
selection = [
ind.row() for ind in self.currentGroupSelection().indexes()
]
return group, selection
def set_data(self, parent, data):
""" Initialize widget state after receiving new data.
"""
self.__parent = parent
# self.__currentIndex = parent.current_group_index
if data is not None:
column_groups, row_groups = group_candidates(data)
self.targets = column_groups + row_groups
model = QStandardItemModel()
for item in [standarditem_from(desc) for desc in self.targets]:
model.appendRow(item)
self.setModel(model)
else:
self.targets = []
self.setModel(None)
def clear(self):
""" Clear the widget/model (same as ``setModel(None)``).
"""
if self.__model is not None:
self.values_view.selectionModel().clearSelection()
self.values_view.selectionModel().selectionChanged.disconnect(
self.__onSelectionChanged)
self.values_view.setModel(None)
self.labels_combo.setModel(QStandardItemModel(self.labels_combo))
self.__currentIndex = -1
self.__selections = {}
self.__model = None
def setModel(self, model):
"""
Set the source model for display.
The model should be a tree model with depth 2.
Parameters
----------
model : QtCore.QAbstractItemModel
"""
if model is self.__model:
return
self.clear()
if model is None:
return
self.__model = model
self.values_view.setModel(model)
self.values_view.setRootIndex(model.index(0, 0))
self.values_view.selectionModel().selectionChanged.connect(
self.__onSelectionChanged)
# will emit the currentIndexChanged (if the model is not empty)
self.labels_combo.setModel(model)
def model(self):
"""
Return the current model.
Returns
-------
model : QtCore.QAbstractItemModel
"""
return self.__model
def setCurrentGroupIndex(self, index):
"""
Set the current selected group/root index row.
Parameters
----------
index : int
Group index.
"""
self.labels_combo.setCurrentIndex(index)
def currentGroupIndex(self):
"""
Return the current selected group/root index row.
Returns
-------
row : index
Current group row index (-1 if there is no current index)
"""
return self.labels_combo.currentIndex()
def setSelection(self, selection):
"""
Set the model item selection.
Parameters
----------
selection : QtCore.QItemSelection
Item selection.
"""
if self.values_view.selectionModel() is not None:
indices = selection.indexes()
pind = defaultdict(list)
for index in indices:
parent = index.parent()
if parent.isValid():
if parent == self.__model.index(parent.row(),
parent.column()):
pind[parent.row()].append(QPersistentModelIndex(index))
else:
warnings.warn("Die Die Die")
else:
# top level index
pass
self.__selections = pind
self.__restoreSelection()
def selection(self):
"""
Return the item selection.
Returns
-------
selection : QtCore.QItemSelection
"""
selection = QItemSelection()
if self.__model is None:
return selection
for pind in chain(*self.__selections.values()):
ind = self.__model.index(pind.row(), pind.column(), pind.parent())
if ind.isValid():
selection.select(ind, ind)
return selection
def currentGroupSelection(self):
"""
Return the item selection for the current group only.
"""
if self.values_view.selectionModel() is not None:
return self.values_view.selectionModel().selection()
else:
return QItemSelection()
def __onCurrentIndexChanged(self, index):
self.__storeSelection(self.__currentIndex,
self.values_view.selectedIndexes())
self.__currentIndex = index
if self.__model is not None:
root = self.__model.index(index, 0)
self.values_view.setRootIndex(root)
self.__restoreSelection()
self.groupChanged.emit(index)
def __onSelectionChanged(self, old, new):
self.__storeSelection(self.__currentIndex,
self.values_view.selectedIndexes())
self.groupSelectionChanged.emit(self.__currentIndex)
def __storeSelection(self, groupind, indices):
# Store current values selection for the current group
groupind = self.__currentIndex
indices = [
QPersistentModelIndex(ind)
for ind in self.values_view.selectedIndexes()
]
self.__selections[groupind] = indices
def __restoreSelection(self):
# Restore previous selection for root (if available)
assert self.__model is not None
groupind = self.__currentIndex
root = self.__model.index(groupind, 0)
sel = self.__selections.get(groupind, [])
indices = [
self.__model.index(pind.row(), pind.column(), root) for pind in sel
if pind.isValid() and pind.parent() == root
]
selection = QItemSelection()
for ind in indices:
selection.select(ind, ind)
self.values_view.selectionModel().select(
selection, QItemSelectionModel.ClearAndSelect)
def sizeHint(self):
"""Reimplemented from QWidget.sizeHint"""
return QSize(100, 200)
