使用QCompleter进行全局输入？

Question

我已经实现了一个标准的PyQt QCompleter一个QLineEdit内，其中的胆量：

self.cam_completer = QtGui.QCompleter(self.cameras, self) 
self.cam_completer.setCaseSensitivity(0) 
self.cam_completer.setCompletionMode(2) 
self.CamerasSearch.setCompleter(self.cam_completer) 

其中self.cameras是一个字符串list，如：

['cam0001:left', 'cam0001:right', 'cam0002:left', 'cam0002:right', etc...] 

内QLineEdit，进入cam将返回所有项目，cam0001将仅返回前两个等。但是，当我输入cam*时，不返回任何内容。

我希望能够在搜索时能模式化，包括*和?。例如，搜索cam000?:left将从结果中消除cam0010:left。

Answer 1

看起来你将不得不实施你自己的完成者。下面是一个使用正则表达式来过滤完井的例子：

#!/usr/bin/env python 
#-*- coding:utf-8 -*- 

#--------- 
# IMPORT 
#--------- 
import sys, random 

import sip 
sip.setapi('QString', 2) 
sip.setapi('QVariant', 2) 

from PyQt4 import QtGui, QtCore 

#--------- 
# DEFINE 
#--------- 
class QDialogTest(QtGui.QDialog): 
    def __init__(self, parent=None): 
     super(QDialogTest, self).__init__(parent) 

     self.maxVisibleItems = 7 

     self.lineEdit = QtGui.QLineEdit(self) 
     self.lineEdit.textChanged.connect(self.on_lineEdit_textChanged) 

     self.standardItemModel = QtGui.QStandardItemModel(self) 

     with open("/usr/share/dict/words", "r") as fileInput: 
      for line in random.sample(fileInput.readlines(), 111): 
       self.standardItemModel.appendRow(
        QtGui.QStandardItem(line.strip()) 
       ) 

     self.sortFilterProxyModel = QtGui.QSortFilterProxyModel(self) 
     self.sortFilterProxyModel.setSourceModel(self.standardItemModel) 
     self.sortFilterProxyModel.setFilterKeyColumn(0) 

     self.tableView = QtGui.QTableView(self) 
     self.tableView.horizontalHeader().setStretchLastSection(True) 
     self.tableView.setModel(self.sortFilterProxyModel) 

     self.pushButtonClose = QtGui.QPushButton(self) 
     self.pushButtonClose.setText("Close") 
     self.pushButtonClose.clicked.connect(sys.exit) 

     self.layoutVertical = QtGui.QVBoxLayout(self) 
     self.layoutVertical.addWidget(self.tableView) 
     self.layoutVertical.addWidget(self.lineEdit) 
     self.layoutVertical.addWidget(self.pushButtonClose) 

     self.tableViewPopup = QtGui.QTableView(self) 
     self.tableViewPopup.setModel(self.sortFilterProxyModel) 
     self.tableViewPopup.setWindowFlags(QtCore.Qt.Popup) 
     self.tableViewPopup.setFocusPolicy(QtCore.Qt.NoFocus) 
     self.tableViewPopup.setFocusProxy(self.lineEdit) 
     self.tableViewPopup.setMouseTracking(True) 
     self.tableViewPopup.setEditTriggers(QtGui.QTableView.NoEditTriggers) 
     self.tableViewPopup.setSelectionBehavior(QtGui.QTableView.SelectRows) 
     self.tableViewPopup.setFrameStyle(QtGui.QFrame.Box | QtGui.QFrame.Plain) 
     self.tableViewPopup.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff) 
     self.tableViewPopup.horizontalHeader().setStretchLastSection(True) 
     self.tableViewPopup.horizontalHeader().hide() 
     self.tableViewPopup.verticalHeader().hide() 
     self.tableViewPopup.verticalHeader().setDefaultSectionSize(20) 
     self.tableViewPopup.doubleClicked.connect(self.setCurrentCompletion) 
     self.tableViewPopup.installEventFilter(self) 

    def setCurrentCompletion(self): 
     self.closePopup() 

     indexes = self.tableViewPopup.selectionModel().selectedIndexes() 

     self.lineEdit.blockSignals(True) 
     self.lineEdit.setText(indexes[0].data(QtCore.Qt.DisplayRole)) 
     self.lineEdit.blockSignals(False) 

    def closePopup(self): 
     self.tableViewPopup.hide() 
     self.lineEdit.setFocus() 

    def eventFilter(self, obj, event): 
     if obj != self.tableViewPopup: 
      return False 

     elif event.type() == QtCore.QEvent.MouseButtonPress: 
      self.closePopup() 

     elif event.type() == QtCore.QEvent.KeyPress: 
      if event.key() in [ 
       QtCore.Qt.Key_Enter, 
       QtCore.Qt.Key_Return 
      ]: 
       self.setCurrentCompletion() 

      elif event.key() in [ 
       QtCore.Qt.Key_Escape 
      ]: 
       self.closePopup() 

      elif not event.key() in [ 
       QtCore.Qt.Key_Up, 
       QtCore.Qt.Key_Down, 
       QtCore.Qt.Key_Home, 
       QtCore.Qt.Key_End, 
       QtCore.Qt.Key_PageUp, 
       QtCore.Qt.Key_PageDown 
      ]: 
       self.lineEdit.event(event) 

     return super(QDialogTest, self).eventFilter(obj, event) 

    @QtCore.pyqtSlot(str) 
    def on_lineEdit_textChanged(self, text): 
     self.tableViewPopup.hide() 

     if text != "": 
      self.setCompletionPrefix(text) 

    def setCompletionPrefix(self, prefix): 
     self.sortFilterProxyModel.setFilterRegExp(QtCore.QRegExp(prefix)) 

     if self.sortFilterProxyModel.rowCount(): 
      self.complete() 

    def complete(self): 
     self.tableViewPopup.move(
      self.lineEdit.mapToGlobal(
       QtCore.QPoint(0, self.lineEdit.height()) 
      ) 
     ) 
     self.tableViewPopup.resize(
      self.lineEdit.width(), 
      self.tableViewPopup.verticalHeader().defaultSectionSize() * min(
       self.maxVisibleItems, 
       self.sortFilterProxyModel.rowCount() 
      ) + 2 
     ) 
     self.tableViewPopup.setFocus() 
     self.tableViewPopup.show()  

#--------- 
# MAIN 
#--------- 
if __name__ == "__main__":  
    app = QtGui.QApplication(sys.argv) 
    app.setApplicationName('QDialogTest') 

    main = QDialogTest() 
    main.resize(333, 333) 
    main.exec_() 

    sys.exit(app.exec_())