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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2012 Digia Plc
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
## the names of its contributors may be used to endorse or promote
## products derived from this software without specific prior written
## permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
## $QT_END_LICENSE$
##
#############################################################################
from PyQt5.QtCore import QFile, QStringListModel, Qt
from PyQt5.QtGui import QCursor, QKeySequence, QTextCursor
from PyQt5.QtWidgets import (QAction, QApplication, QCompleter, QMainWindow,
QMessageBox, QTextEdit)
import customcompleter_rc
class TextEdit(QTextEdit):
def __init__(self, parent=None):
super(TextEdit, self).__init__(parent)
self._completer = None
self.setPlainText(
"This TextEdit provides autocompletions for words that have "
"more than 3 characters. You can trigger autocompletion "
"using %s" % QKeySequence("Ctrl+E").toString(
QKeySequence.NativeText))
def setCompleter(self, c):
if self._completer is not None:
self._completer.activated.disconnect()
self._completer = c
c.setWidget(self)
c.setCompletionMode(QCompleter.PopupCompletion)
c.setCaseSensitivity(Qt.CaseInsensitive)
c.activated.connect(self.insertCompletion)
def completer(self):
return self._completer
def insertCompletion(self, completion):
if self._completer.widget() is not self:
return
tc = self.textCursor()
extra = len(completion) - len(self._completer.completionPrefix())
tc.movePosition(QTextCursor.Left)
tc.movePosition(QTextCursor.EndOfWord)
tc.insertText(completion[-extra:])
self.setTextCursor(tc)
def textUnderCursor(self):
tc = self.textCursor()
tc.select(QTextCursor.WordUnderCursor)
return tc.selectedText()
def focusInEvent(self, e):
if self._completer is not None:
self._completer.setWidget(self)
super(TextEdit, self).focusInEvent(e)
def keyPressEvent(self, e):
if self._completer is not None and self._completer.popup().isVisible():
# The following keys are forwarded by the completer to the widget.
if e.key() in (Qt.Key_Enter, Qt.Key_Return, Qt.Key_Escape, Qt.Key_Tab, Qt.Key_Backtab):
e.ignore()
# Let the completer do default behavior.
return
isShortcut = ((e.modifiers() & Qt.ControlModifier) != 0 and e.key() == Qt.Key_E)
if self._completer is None or not isShortcut:
# Do not process the shortcut when we have a completer.
super(TextEdit, self).keyPressEvent(e)
ctrlOrShift = e.modifiers() & (Qt.ControlModifier | Qt.ShiftModifier)
if self._completer is None or (ctrlOrShift and len(e.text()) == 0):
return
eow = "~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="
hasModifier = (e.modifiers() != Qt.NoModifier) and not ctrlOrShift
completionPrefix = self.textUnderCursor()
if not isShortcut and (hasModifier or len(e.text()) == 0 or len(completionPrefix) < 3 or e.text()[-1] in eow):
self._completer.popup().hide()
return
if completionPrefix != self._completer.completionPrefix():
self._completer.setCompletionPrefix(completionPrefix)
self._completer.popup().setCurrentIndex(
self._completer.completionModel().index(0, 0))
cr = self.cursorRect()
cr.setWidth(self._completer.popup().sizeHintForColumn(0) + self._completer.popup().verticalScrollBar().sizeHint().width())
self._completer.complete(cr)
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.createMenu()
self.completingTextEdit = TextEdit()
self.completer = QCompleter(self)
self.completer.setModel(self.modelFromFile(':/resources/wordlist.txt'))
self.completer.setModelSorting(QCompleter.CaseInsensitivelySortedModel)
self.completer.setCaseSensitivity(Qt.CaseInsensitive)
self.completer.setWrapAround(False)
self.completingTextEdit.setCompleter(self.completer)
self.setCentralWidget(self.completingTextEdit)
self.resize(500, 300)
self.setWindowTitle("Completer")
def createMenu(self):
exitAction = QAction("Exit", self)
aboutAct = QAction("About", self)
aboutQtAct = QAction("About Qt", self)
exitAction.triggered.connect(QApplication.instance().quit)
aboutAct.triggered.connect(self.about)
aboutQtAct.triggered.connect(QApplication.instance().aboutQt)
fileMenu = self.menuBar().addMenu("File")
fileMenu.addAction(exitAction)
helpMenu = self.menuBar().addMenu("About")
helpMenu.addAction(aboutAct)
helpMenu.addAction(aboutQtAct)
def modelFromFile(self, fileName):
f = QFile(fileName)
if not f.open(QFile.ReadOnly):
return QStringListModel(self.completer)
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
words = []
while not f.atEnd():
line = f.readLine().trimmed()
if line.length() != 0:
try:
line = str(line, encoding='ascii')
except TypeError:
line = str(line)
words.append(line)
QApplication.restoreOverrideCursor()
return QStringListModel(words, self.completer)
def about(self):
QMessageBox.about(self, "About",
"This example demonstrates the different features of the "
"QCompleter class.")
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
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