61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
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"""A simple completer for the qtconsole"""
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# Copyright (c) Jupyter Development Team.
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# Distributed under the terms of the Modified BSD License.
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from qtpy import QtCore, QtGui, QtWidgets
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import ipython_genutils.text as text
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class CompletionPlain(QtWidgets.QWidget):
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""" A widget for tab completion, navigable by arrow keys """
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#--------------------------------------------------------------------------
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# 'QObject' interface
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#--------------------------------------------------------------------------
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def __init__(self, console_widget):
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""" Create a completion widget that is attached to the specified Qt
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text edit widget.
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"""
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assert isinstance(console_widget._control, (QtWidgets.QTextEdit, QtWidgets.QPlainTextEdit))
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super(CompletionPlain, self).__init__()
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self._text_edit = console_widget._control
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self._console_widget = console_widget
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self._text_edit.installEventFilter(self)
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def eventFilter(self, obj, event):
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""" Reimplemented to handle keyboard input and to auto-hide when the
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text edit loses focus.
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"""
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if obj == self._text_edit:
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etype = event.type()
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if etype in( QtCore.QEvent.KeyPress, QtCore.QEvent.FocusOut ):
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self.cancel_completion()
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return super(CompletionPlain, self).eventFilter(obj, event)
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#--------------------------------------------------------------------------
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# 'CompletionPlain' interface
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#--------------------------------------------------------------------------
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def cancel_completion(self):
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"""Cancel the completion, reseting internal variable, clearing buffer """
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self._console_widget._clear_temporary_buffer()
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def show_items(self, cursor, items, prefix_length=0):
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""" Shows the completion widget with 'items' at the position specified
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by 'cursor'.
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"""
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if not items :
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return
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self.cancel_completion()
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strng = text.columnize(items)
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# Move cursor to start of the prefix to replace it
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# when a item is selected
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cursor.movePosition(QtGui.QTextCursor.Left, n=prefix_length)
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self._console_widget._fill_temporary_buffer(cursor, strng, html=False)
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