def __init__(self, parent):
super().__init__(parent)
self.setFont(QFontDatabase.systemFont(QFontDatabase.FixedFont))
self.setAcceptRichText(False)
self.setTabChangesFocus(True)
self._highlighter = RulesEditorHighlighter(self.document())
self._quiescence_timer = QTimer(self)
self._quiescence_timer.setSingleShot(True)
self._quiescence_timer.setInterval(self.QUIESCENCE_TIME_MSEC)
self._quiescence_timer.timeout.connect(self._on_quiescence_timer_timeout)
self.document().contentsChanged.connect(self._on_contents_changed)
class RulesEditor(QTextEdit):
QUIESCENCE_TIME_MSEC = 1000
rules_edited = pyqtSignal(str)
_highlighter = None
_quiescence_timer = None
_last_emitted_text = ""
_performing_programmatic_change = False
def __init__(self, parent):
super().__init__(parent)
self.setFont(QFontDatabase.systemFont(QFontDatabase.FixedFont))
self.setAcceptRichText(False)
self.setTabChangesFocus(True)
self._highlighter = RulesEditorHighlighter(self.document())
self._quiescence_timer = QTimer(self)
self._quiescence_timer.setSingleShot(True)
self._quiescence_timer.setInterval(self.QUIESCENCE_TIME_MSEC)
self._quiescence_timer.timeout.connect(self._on_quiescence_timer_timeout)
self.document().contentsChanged.connect(self._on_contents_changed)
def rules(self):
return self.document().toPlainText()
@pyqtSlot()
def set_rules(self, rules_text):
self._quiescence_timer.stop()
self.document().setPlainText(rules_text)
self.clear_error()
self._maybe_emit_rules_edited()
@pyqtSlot()
def show_error(self, error_span):
self._performing_programmatic_change = True
self._highlighter.set_error_span(error_span)
self._performing_programmatic_change = False
@pyqtSlot()
def clear_error(self):
self._performing_programmatic_change = True
self._highlighter.set_error_span(None)
self._performing_programmatic_change = False
def setDocument(self, document):
assert False, "setDocument() should not be called directly on the rules editor"
def focusOutEvent(self, event):
self._quiescence_timer.stop()
self._maybe_emit_rules_edited()
super().focusOutEvent(event)
@pyqtSlot()
def _on_contents_changed(self):
if self._performing_programmatic_change:
return
self._quiescence_timer.start()
self.clear_error()
@pyqtSlot()
def _on_quiescence_timer_timeout(self):
self._maybe_emit_rules_edited()
def _maybe_emit_rules_edited(self):
if self.rules() != self._last_emitted_text:
self._last_emitted_text = self.rules()
self.rules_edited.emit(self.rules())