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Merge pull request #2076 from fperez/exclude-static-tests...
Merge pull request #2076 from fperez/exclude-static-tests Skip notebook 'static' dir in test suite. There's nothing there we should be running python tests on, and occasionally python files may appear there that cause problems to nose (e.g. mathjax ships a non-py3 valid conf.py that breaks py3 testing). Closes #2075

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completion_widget.py
138 lines | 5.2 KiB | text/x-python | PythonLexer
# System library imports
from IPython.external.qt import QtCore, QtGui
class CompletionWidget(QtGui.QListWidget):
""" A widget for GUI tab completion.
"""
#--------------------------------------------------------------------------
# 'QObject' interface
#--------------------------------------------------------------------------
def __init__(self, console_widget):
""" Create a completion widget that is attached to the specified Qt
text edit widget.
"""
text_edit = console_widget._control
assert isinstance(text_edit, (QtGui.QTextEdit, QtGui.QPlainTextEdit))
super(CompletionWidget, self).__init__()
self._text_edit = text_edit
self.setAttribute(QtCore.Qt.WA_StaticContents)
self.setWindowFlags(QtCore.Qt.ToolTip | QtCore.Qt.WindowStaysOnTopHint)
# Ensure that the text edit keeps focus when widget is displayed.
self.setFocusProxy(self._text_edit)
self.setFrameShadow(QtGui.QFrame.Plain)
self.setFrameShape(QtGui.QFrame.StyledPanel)
self.itemActivated.connect(self._complete_current)
def eventFilter(self, obj, event):
""" Reimplemented to handle keyboard input and to auto-hide when the
text edit loses focus.
"""
if obj == self._text_edit:
etype = event.type()
if etype == QtCore.QEvent.KeyPress:
key, text = event.key(), event.text()
if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter,
QtCore.Qt.Key_Tab):
self._complete_current()
return True
elif key == QtCore.Qt.Key_Escape:
self.hide()
return True
elif key in (QtCore.Qt.Key_Up, QtCore.Qt.Key_Down,
QtCore.Qt.Key_PageUp, QtCore.Qt.Key_PageDown,
QtCore.Qt.Key_Home, QtCore.Qt.Key_End):
self.keyPressEvent(event)
return True
elif etype == QtCore.QEvent.FocusOut:
self.hide()
return super(CompletionWidget, self).eventFilter(obj, event)
#--------------------------------------------------------------------------
# 'QWidget' interface
#--------------------------------------------------------------------------
def hideEvent(self, event):
""" Reimplemented to disconnect signal handlers and event filter.
"""
super(CompletionWidget, self).hideEvent(event)
self._text_edit.cursorPositionChanged.disconnect(self._update_current)
self._text_edit.removeEventFilter(self)
def showEvent(self, event):
""" Reimplemented to connect signal handlers and event filter.
"""
super(CompletionWidget, self).showEvent(event)
self._text_edit.cursorPositionChanged.connect(self._update_current)
self._text_edit.installEventFilter(self)
#--------------------------------------------------------------------------
# 'CompletionWidget' interface
#--------------------------------------------------------------------------
def show_items(self, cursor, items):
""" Shows the completion widget with 'items' at the position specified
by 'cursor'.
"""
text_edit = self._text_edit
point = text_edit.cursorRect(cursor).bottomRight()
point = text_edit.mapToGlobal(point)
height = self.sizeHint().height()
screen_rect = QtGui.QApplication.desktop().availableGeometry(self)
if screen_rect.size().height() - point.y() - height < 0:
point = text_edit.mapToGlobal(text_edit.cursorRect().topRight())
point.setY(point.y() - height)
self.move(point)
self._start_position = cursor.position()
self.clear()
self.addItems(items)
self.setCurrentRow(0)
self.show()
#--------------------------------------------------------------------------
# Protected interface
#--------------------------------------------------------------------------
def _complete_current(self):
""" Perform the completion with the currently selected item.
"""
self._current_text_cursor().insertText(self.currentItem().text())
self.hide()
def _current_text_cursor(self):
""" Returns a cursor with text between the start position and the
current position selected.
"""
cursor = self._text_edit.textCursor()
if cursor.position() >= self._start_position:
cursor.setPosition(self._start_position,
QtGui.QTextCursor.KeepAnchor)
return cursor
def _update_current(self):
""" Updates the current item based on the current text.
"""
prefix = self._current_text_cursor().selection().toPlainText()
if prefix:
items = self.findItems(prefix, (QtCore.Qt.MatchStartsWith |
QtCore.Qt.MatchCaseSensitive))
if items:
self.setCurrentItem(items[0])
else:
self.hide()
else:
self.hide()
def cancel_completion(self):
self.hide()