def paintEvent(self, event):
"""Reimplemented."""
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
painter = QStylePainter(self)
painter.drawComplexControl(QStyle.CC_ComboBox, opt)
if not self.__searchline.isVisibleTo(self):
opt.editable = False
painter.drawControl(QStyle.CE_ComboBoxLabel, opt)
def paintEvent(self, event):
"""Reimplemented."""
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
painter = QStylePainter(self)
painter.drawComplexControl(QStyle.CC_ComboBox, opt)
if not self.__searchline.isVisibleTo(self):
opt.editable = False
painter.drawControl(QStyle.CE_ComboBoxLabel, opt)
def __updateGeometries(self):
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
editarea = self.style().subControlRect(QStyle.CC_ComboBox, opt,
QStyle.SC_ComboBoxEditField,
self)
self.__searchline.setGeometry(editarea)
def paintEvent(self, _event) -> None:
painter = QStylePainter(self)
option = QStyleOptionComboBox()
self.initStyleOption(option)
painter.drawComplexControl(QStyle.CC_ComboBox, option)
foreground = self.currentData(Qt.ForegroundRole)
if isinstance(foreground, (QBrush, QColor)):
foreground = QBrush(foreground)
if foreground.style() != Qt.NoBrush:
# some styles take WindowText some just use current pen?
option.palette.setBrush(QPalette.WindowText, foreground)
option.palette.setBrush(QPalette.ButtonText, foreground)
option.palette.setBrush(QPalette.Text, foreground)
painter.setPen(QPen(foreground, painter.pen().widthF()))
font = self.currentData(Qt.FontRole)
if isinstance(font, QFont):
option.fontMetrics = QFontMetrics(font)
painter.setFont(font)
painter.drawControl(QStyle.CE_ComboBoxLabel, option)
def eventFilter(self, obj, event): # pylint: disable=too-many-branches
# type: (QObject, QEvent) -> bool
"""Reimplemented."""
etype = event.type()
if etype == QEvent.FocusOut and self.__popup is not None:
self.hidePopup()
return True
if etype == QEvent.Hide and self.__popup is not None:
self.hidePopup()
return False
if etype == QEvent.KeyPress or etype == QEvent.KeyRelease or \
etype == QEvent.ShortcutOverride and obj is self.__popup:
event = event # type: QKeyEvent
key, modifiers = event.key(), event.modifiers()
if key in (Qt.Key_Enter, Qt.Key_Return, Qt.Key_Select):
current = self.__popup.currentIndex()
if current.isValid():
self.__activateProxyIndex(current)
elif key in (Qt.Key_Up, Qt.Key_Down,
Qt.Key_PageUp, Qt.Key_PageDown):
return False #
elif key in (Qt.Key_Tab, Qt.Key_Backtab):
pass
elif key == Qt.Key_Escape or \
(key == Qt.Key_F4 and modifiers & Qt.AltModifier):
self.__popup.hide()
return True
else:
# pass the input events to the filter edit line (no propagation
# up the parent chain).
self.__searchline.event(event)
if event.isAccepted():
return True
if etype == QEvent.MouseButtonRelease and self.__popup is not None \
and obj is self.__popup.viewport() \
and self.__popupTimer.elapsed() >= \
QApplication.doubleClickInterval():
event = event # type: QMouseEvent
index = self.__popup.indexAt(event.pos())
if index.isValid():
self.__activateProxyIndex(index)
if etype == QEvent.MouseMove and self.__popup is not None \
and obj is self.__popup.viewport():
event = event # type: QMouseEvent
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
style = self.style() # type: QStyle
if style.styleHint(QStyle.SH_ComboBox_ListMouseTracking, opt, self):
index = self.__popup.indexAt(event.pos())
if index.isValid() and \
index.flags() & (Qt.ItemIsEnabled | Qt.ItemIsSelectable):
self.__popup.setCurrentIndex(index)
if etype == QEvent.MouseButtonPress and self.__popup is obj:
# Popup border or out of window mouse button press/release.
# At least on windows this needs to be handled.
style = self.style()
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
opt.subControls = QStyle.SC_All
opt.activeSubControls = QStyle.SC_ComboBoxArrow
pos = self.mapFromGlobal(event.globalPos())
sc = style.hitTestComplexControl(QStyle.CC_ComboBox, opt, pos, self)
if sc != QStyle.SC_None:
self.__popup.setAttribute(Qt.WA_NoMouseReplay)
self.hidePopup()
return super().eventFilter(obj, event)
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 eventFilter(self, obj, event): # pylint: disable=too-many-branches
# type: (QObject, QEvent) -> bool
"""Reimplemented."""
etype = event.type()
if etype == QEvent.FocusOut and self.__popup is not None:
self.hidePopup()
return True
if etype == QEvent.Hide and self.__popup is not None:
self.hidePopup()
return False
if etype == QEvent.KeyPress or etype == QEvent.KeyRelease or \
etype == QEvent.ShortcutOverride and obj is self.__popup:
event = event # type: QKeyEvent
key, modifiers = event.key(), event.modifiers()
if key in (Qt.Key_Enter, Qt.Key_Return, Qt.Key_Select):
current = self.__popup.currentIndex()
if current.isValid():
self.__activateProxyIndex(current)
elif key in (Qt.Key_Up, Qt.Key_Down,
Qt.Key_PageUp, Qt.Key_PageDown):
return False #
elif key in (Qt.Key_Tab, Qt.Key_Backtab):
pass
elif key == Qt.Key_Escape or \
(key == Qt.Key_F4 and modifiers & Qt.AltModifier):
self.__popup.hide()
return True
else:
# pass the input events to the filter edit line (no propagation
# up the parent chain).
self.__searchline.event(event)
if event.isAccepted():
return True
if etype == QEvent.MouseButtonRelease and self.__popup is not None \
and obj is self.__popup.viewport() \
and self.__popupTimer.elapsed() >= \
QApplication.doubleClickInterval():
event = event # type: QMouseEvent
index = self.__popup.indexAt(event.pos())
if index.isValid():
self.__activateProxyIndex(index)
if etype == QEvent.MouseMove and self.__popup is not None \
and obj is self.__popup.viewport():
event = event # type: QMouseEvent
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
style = self.style() # type: QStyle
if style.styleHint(QStyle.SH_ComboBox_ListMouseTracking, opt, self):
index = self.__popup.indexAt(event.pos())
if index.isValid() and \
index.flags() & (Qt.ItemIsEnabled | Qt.ItemIsSelectable):
self.__popup.setCurrentIndex(index)
if etype == QEvent.MouseButtonPress and self.__popup is obj:
# Popup border or out of window mouse button press/release.
# At least on windows this needs to be handled.
style = self.style()
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
opt.subControls = QStyle.SC_All
opt.activeSubControls = QStyle.SC_ComboBoxArrow
pos = self.mapFromGlobal(event.globalPos())
sc = style.hitTestComplexControl(QStyle.CC_ComboBox, opt, pos, self)
if sc != QStyle.SC_None:
self.__popup.setAttribute(Qt.WA_NoMouseReplay)
self.hidePopup()
return super().eventFilter(obj, event)