QTreeView更改所选项目–显示文本

当用户在UI中点击“编辑”时,如何更改treeview中选定行的第二列中显示的文本?我正在使用python和pyside,但我不清楚如何做到这一点。

import sys
from PySide import QtGui, QtCore

class SortModel(QtGui.QSortFilterProxyModel):

    def __init__(self, *args, **kwargs):
        super(SortModel, self).__init__(*args, **kwargs)

    def lessThan(self, left, right):
        leftData = self.sourceModel().data(left)
        rightData = self.sourceModel().data(right)

        if leftData:
            leftData = leftData.lower()
        if rightData:
            rightData = rightData.lower()

        print('L:', leftData, 'R:', rightData)
        return leftData < rightData


class Browser(QtGui.QDialog):
    def __init__(self, parent=None):
        super(Browser, self).__init__(parent)

        self.initUI()

    def initUI(self):
        self.resize(200, 300)
        self.setWindowTitle('Assets')
        self.setModal(True)

        self.results = ""

        self.uiItems = QtGui.QTreeView()
        self.uiItems.setAlternatingRowColors(True)
        self.uiItems.setSortingEnabled(True)
        self.uiItems.sortByColumn(0, QtCore.Qt.AscendingOrder)
        self.uiItems.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
        self.uiItems.header().setResizeMode(QtGui.QHeaderView.ResizeToContents)
        self.uiItems.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
        self.uiItems.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
        self._model = self.create_model(self)
        self._spmodel = SortModel(self)
        self._spmodel.setSourceModel(self._model)
        self._spmodel.setDynamicSortFilter(False)
        self.uiItems.setModel(self._spmodel)

        self.uiEdit = QtGui.QPushButton('Edit')

        grid = QtGui.QGridLayout()
        grid.setContentsMargins(0, 0, 0, 0)
        grid.addWidget(self.uiItems, 0, 0)
        grid.addWidget(self.uiEdit, 1, 0)
        self.setLayout(grid)

        self.uiItems.doubleClicked.connect(self.doubleClickedItem)
        self.show()

    def doubleClickedItem(self, idx):
        name = idx.data(role=QtCore.Qt.DisplayRole)
        model = idx.model()
        model.setData(idx, 'great', role=QtCore.Qt.DisplayRole)

    def create_model(self, parent):

        items = [
            'Cookie dough',
            'Hummus',
            'Spaghetti',
            'Dal makhani',
            'Chocolate whipped cream'
        ]

        model = QtGui.QStandardItemModel()
        model.setHorizontalHeaderLabels(['Name', 'Great'])

        for item in items:

            root = []
            parentNode = QtGui.QStandardItem(item)
            root.append(parentNode)

            # add child row with 2 columns
            for i in range(3):
                row = []
                col1 = QtGui.QStandardItem()
                col1.setData('COLUMN 1', role=QtCore.Qt.DisplayRole)
                row.append(col1)
                col2 = QtGui.QStandardItem()
                col2.setData('COLUMN 2', role=QtCore.Qt.DisplayRole)
                row.append(col2)           
                parentNode.appendRow(row)

            model.appendRow(root)

        return model

    def showEvent(self, event):
        geom = self.frameGeometry()
        geom.moveCenter(QtGui.QCursor.pos())
        self.setGeometry(geom)
        super(Browser, self).showEvent(event)

    def keyPressEvent(self, event):
        if event.key() == QtCore.Qt.Key_Escape:
            # self.hide()
            self.close()
            event.accept()
        else:
            super(Browser, self).keyPressEvent(event)


def main():
    app = QtGui.QApplication(sys.argv)
    ex = Browser()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()