def eventFilter(self, _, event: QEvent) -> bool:
"""Receive events for a QLineEdit and if enter is pressed
start completion. Always returns False to indicate the
target object should still process the event.
"""
if not isinstance(event, QKeyEvent):
return False
lineedit = self._lineedit
completer = lineedit.completer()
if event.key() == Qt.Key_Return:
# if completion list is of len = 1, accept the completion else continue
if completer.completionCount() == 1:
completion_text = completer.currentCompletion()
if completion_text != lineedit.currentText():
# manually emit the code completion signal
completer.activated.emit(completion_text)
elif event.key() in [Qt.Key_Down, Qt.Key_Up]:
# If up or down pressed, start the completer
completer.complete()
return False
def event(self, ev: QEvent) -> bool:
# Tab: Insert 4 spaces
# Arrow Up/Down: select a line from the history buffer
# Newline: Emit returned signal
if ev.type() == QEvent.KeyPress:
if ev.key() == Qt.Key_Tab:
self.insert(' ' * 4)
return True
elif ev.key() == Qt.Key_Backtab:
ccp = self.cursorPosition()
tl = self.text()[:ccp]
tr = self.text()[ccp:]
ends_with_tab = re.match(r"(.*)\s\s\s\s$", tl)
if ends_with_tab:
self.setText(tl[:-4] + tr)
self.setCursorPosition(ccp - 4)
return True
elif ev.key() == Qt.Key_Up:
self.recall(self.hist_index - 1)
return True
elif ev.key() == Qt.Key_Down:
self.recall(self.hist_index + 1)
return True
elif ev.key() == Qt.Key_Return:
if len(self.text()) == 0 and ev.modifiers(
) == Qt.ControlModifier:
self.open_text_edit()
else:
self.returnkey()
return True
return super().event(ev)
def _handle_edit(self, event: QtCore.QEvent):
"""Handle closing edit box and redisplayin label"""
if event.type() == QtCore.QEvent.Type.KeyPress:
key = event.key()
if key in (QtCore.Qt.Key.Key_Return, QtCore.Qt.Key.Key_Enter):
if not self.edit.hasAcceptableInput():
self.setCurrentWidget(self.label)
return
self.label.setText(self.edit.text())
self.setCurrentWidget(self.label)
self.valueChanged.emit(self.label.text())
if key == QtCore.Qt.Key.Key_Escape:
self.setCurrentWidget(self.label)
elif event.type() == QtCore.QEvent.FocusOut:
self.setCurrentWidget(self.label)
def keyPressEvent(self, evt: QtCore.QEvent) -> None:
super(PLineEdit, self).keyPressEvent(evt)
if (evt.key() == QtCore.Qt.Key_Return
or evt.key() == QtCore.Qt.Key_Enter) and self.suppress_enter:
evt.accept()
