具有自动完成功能的QComboBox在PyQt4中工作，但在PySid中不起作用

Question

我有一个带有自定义完成符的组合框，它在PyQt4中运行良好，但在PySide中不起作用。在

我已经验证了新的完成器正在替换QComboBox的内置完成器，因为不再发生内联完成。但是，当使用PySide运行时，完成程序不会弹出一个经过筛选的选项列表。在

我还尝试确保所有文本都是str或allunicode，以避免使用qstring的pyqtapi 1与PySide使用Python unicode类型之间的差异。更改文本类型对PyQt或PySide的行为都没有影响（PyQt继续工作，PySide不工作）。在

这是我的代码：

from PySide import QtCore
from PySide import QtGui 

#from PyQt4 import QtCore
#from PyQt4 import QtGui


class AdvComboBox(QtGui.QComboBox):
    def __init__(self, parent=None):
        super(AdvComboBox, self).__init__(parent)

        self.setFocusPolicy(QtCore.Qt.StrongFocus)
        self.setEditable(True)

        # add a filter model to filter matching items
        self.pFilterModel = QtGui.QSortFilterProxyModel(self)
        self.pFilterModel.setFilterCaseSensitivity(QtCore.Qt.CaseInsensitive)
        self.pFilterModel.setSourceModel(self.model())

        # add a completer, which uses the filter model
        self.completer = QtGui.QCompleter(self.pFilterModel, self)
        # always show all (filtered) completions
        self.completer.setCompletionMode(QtGui.QCompleter.UnfilteredPopupCompletion)

        self.setCompleter(self.completer)

        # connect signals

        def filter(text):
            print "Edited: ", text, "type: ", type(text)
            self.pFilterModel.setFilterFixedString(str(text))

        self.lineEdit().textEdited[unicode].connect(filter)
        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):
        print "activated"
        if text:
            print "text: ", text
            index = self.findText(str(text))
            print "index: ", index
            self.setCurrentIndex(index)


    # on model change, update the models of the filter and completer as well
    def setModel(self, model):
        super(AdvComboBox, 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(AdvComboBox, self).setModelColumn(column)


if __name__ == "__main__":
    import sys

    app = QtGui.QApplication(sys.argv)

    combo = AdvComboBox()

    names = ['bob', 'fred', 'bobby', 'frederick', 'charles', 'charlie', 'rob']

    # fill the standard model of the combobox
    combo.addItems(names)
    combo.setModelColumn(0)
    combo.resize(300, 40)
    combo.show()

    sys.exit(app.exec_())

Answer 1

我在写问题的时候想出来了。。。在

{completer在初始化一个qc}选项时，它实际上是一个正在工作的模型。在

解决方法是在初始化完成程序后设置完成程序的模型。在

工作代码如下：

from PySide import QtCore
from PySide import QtGui 


class AdvComboBox(QtGui.QComboBox):
    def __init__(self, parent=None):
        super(AdvComboBox, self).__init__(parent)

        self.setFocusPolicy(QtCore.Qt.StrongFocus)
        self.setEditable(True)

        # add a filter model to filter matching items
        self.pFilterModel = QtGui.QSortFilterProxyModel(self)
        self.pFilterModel.setFilterCaseSensitivity(QtCore.Qt.CaseInsensitive)
        self.pFilterModel.setSourceModel(self.model())

        # add a completer
        self.completer = QtGui.QCompleter(self)
        #Set the model that the QCompleter uses
        # - in PySide doing this as a separate step worked better
        self.completer.setModel(self.pFilterModel)
        # always show all (filtered) completions
        self.completer.setCompletionMode(QtGui.QCompleter.UnfilteredPopupCompletion)

        self.setCompleter(self.completer)

        # connect signals

        def filter(text):
            print "Edited: ", text, "type: ", type(text)
            self.pFilterModel.setFilterFixedString(str(text))

        self.lineEdit().textEdited[unicode].connect(filter)
        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):
        print "activated"
        if text:
            print "text: ", text
            index = self.findText(str(text))
            print "index: ", index
            self.setCurrentIndex(index)


    # on model change, update the models of the filter and completer as well
    def setModel(self, model):
        super(AdvComboBox, 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(AdvComboBox, self).setModelColumn(column)


if __name__ == "__main__":
    import sys

    app = QtGui.QApplication(sys.argv)

    combo = AdvComboBox()

    names = ['bob', 'fred', 'bobby', 'frederick', 'charles', 'charlie', 'rob']

    # fill the standard model of the combobox
    combo.addItems(names)
    combo.setModelColumn(0)
    combo.resize(300, 40)
    combo.show()

    sys.exit(app.exec_())