pyqt例子下拉列表

#!/usr/bin/env python

# -*- coding: utf-8 -*-

from PyQt4.QtCore import Qt

from PyQt4.QtGui import QCompleter, QComboBox, QSortFilterProxyModel

class ExtendedComboBox(QComboBox):

def __init__(self, parent=None):

super(ExtendedComboBox, self).__init__(parent)

self.setFocusPolicy(Qt.StrongFocus)

self.setEditable(True)

# add a filter model to filter matching items

self.pFilterModel = QSortFilterProxyModel(self)

self.pFilterModel.setFilterCaseSensitivity(Qt.CaseInsensitive)

self.pFilterModel.setSourceModel(self.model())

# add a completer, which uses the filter model

self.completer = QCompleter(self.pFilterModel, self)

# always show all (filtered) completions

self.completer.setCompletionMode(QCompleter.UnfilteredPopupCompletion)

self.setCompleter(self.completer)

# connect signals

self.lineEdit().textEdited[unicode].connect(self.pFilterModel.setFilterFixedString)

self.completer.activated.connect(self.on_completer_activated)

# on selection of an item from the completer, select the corresponding item from combobox

def on_completer_activated(self, text):

if text:

index = self.findText(text)

self.setCurrentIndex(index)

# on model change, update the models of the filter and completer as well

def setModel(self, model):

super(ExtendedComboBox, self).setModel(model)

self.pFilterModel.setSourceModel(model)

self.completer.setModel(self.pFilterModel)

# on model column change, update the model column of the filter and completer as well

def setModelColumn(self, column):

self.completer.setCompletionColumn(column)

self.pFilterModel.setFilterKeyColumn(column)

super(ExtendedComboBox, self).setModelColumn(column)

if __name__ == "__main__":

import sys

from PyQt4.QtGui import QStringListModel, QApplication

app = QApplication(sys.argv)

string_list = ['hola muchachos', 'adios amigos', 'hello world', 'good bye']

combo = ExtendedComboBox()

# either fill the standard model of the combobox

combo.addItems(string_list)

# or use another model

#combo.setModel(QStringListModel(string_list))

combo.resize(300, 40)

combo.show()

sys.exit(app.exec_())