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# System library imports
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from IPython.external.qt import QtCore, QtGui
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import IPython.utils.html_utils as html_utils
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class CompletionPlain(QtGui.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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_items = ()
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_index = (0, 0)
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_old_cursor = None
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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, (QtGui.QTextEdit, QtGui.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 == QtCore.QEvent.KeyPress:
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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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self._index = (0, 0)
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def show_items(self, cursor, items):
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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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ci = html_utils.columnize_info(items, empty=' ')
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self._items = ci['item_matrix']
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self._old_cursor = cursor
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self._update_list()
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def _update_list(self):
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""" update the list of completion and hilight the currently selected completion """
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if len(self._items) > 100:
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items = self._items[:100]
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else :
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items = self._items
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items_m = items
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self._console_widget._clear_temporary_buffer()
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strng = html_utils.html_tableify(items_m, select=None)
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self._console_widget._fill_temporary_buffer(self._old_cursor, strng, html=True)
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