# The following has been generated automatically from src/gui/qgsexpressionpreviewwidget.h try: QgsExpressionPreviewWidget.__attribute_docs__ = {'expressionParsed': 'Emitted when the user changes the expression in the widget.\nUsers of this widget should connect to this signal to decide if to let the user\ncontinue.\n\n:param isValid: Is ``True`` if the expression the user has typed is valid.\n', 'evalErrorChanged': 'Will be set to ``True`` if the current expression text reported an eval error\nwith the context.\n', 'parserErrorChanged': 'Will be set to ``True`` if the current expression text reported a parser error\nwith the context.\n', 'toolTipChanged': 'Emitted whenever the tool tip changed\n'} except NameError: pass