python - Trying to get a specific column value out of parent row in qtreeview

Question

I have a qtreeview that I populate with hierarchical data like this:

- id1                    id1
    -id1.id2             id2
        - id1.id2.id3    id3

In my non sample application I want to be able to right click on the last row and select a de-link menu option that then goes and deletes the linking record between id2 and id3. To do this I need the id of the child and the parent.

The problem enters with this bit of code

    index = self.eventTree.currentIndex()
    parent_index = index.parent()
    text1 = parent_index.data()
    parent_index = self.model.index(parent_index.row(), 1)
    text2 = parent_index.data()

So I grab the current index from the view, get the parent index from the child index. Up to there everything works as I would expect. If I right clicked on the second column on id3 text1 will equal id2.

Since I need to grab a specific column of the parent row I try to adjust the parent index to that specific column by using the model.index function. However when I do it this way I get the top row (id1) instead of id2.

So I am apparently going about this the wrong way, but I'm not sure what else to try right now.

What would be the proper way of adjusting an index to get a specific column out of the index's row?

Here is a working sample of what I am talking about

from PyQt5 import QtCore, QtGui, QtWidgets
from collections import deque

test_data = [
    {"column2": "id1", "column1": "id1", "column3": "id1-value", "lvl": 0},
    {"column2": "id2", "column1": "id1.id2", "column3": "id2-value", "lvl": 1},
    {"column2": "id3", "column1": "id1.id2.id3", "column3": "id3-value", "lvl": 2},
]

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(640, 480)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.eventTree = QtWidgets.QTreeView(self.centralwidget)
        self.eventTree.setGeometry(QtCore.QRect(10, 40, 621, 391))
        self.eventTree.setObjectName("eventTree")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(20, 10, 89, 25))
        self.pushButton.setObjectName("pushButton")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(170, 10, 391, 17))
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 640, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.model = QtGui.QStandardItemModel()
        self.model.setHorizontalHeaderLabels(["Column1", "Column2", "Column3"])
        self.eventTree.header().setDefaultSectionSize(180)
        self.eventTree.setModel(self.model)
        self.pushButton.clicked.connect(self.clickHandle)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        self.importData(test_data)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.label.setText(_translate("MainWindow", "TextLabel"))

    def clickHandle(self):
        index = self.eventTree.currentIndex()
        parent_index = index.parent()
        parent_index = self.model.index(parent_index.row(), 1)
        text = parent_index.data()
        self.label.setText(text)

    def importData(self, data, root=None, extend=False):
        self.model.setRowCount(0)
        if root is None:
            root = self.model.invisibleRootItem()

        seen = {}
        values = deque(data)
        while values:
            value = values.popleft()
            if value['lvl'] == 0:
                parent = root
            else:
                pid = ".".join(value['column1'].split(".")[:-1])
                if pid not in seen:
                    values.append(value)
                    continue
                parent = seen[pid]
            dbid = value['column1']
            parent.appendRow([
                QtGui.QStandardItem(value['column1']),
                QtGui.QStandardItem(value['column2']),
                QtGui.QStandardItem(value['column3']),
            ])
            seen[dbid] = parent.child(parent.rowCount() - 1)


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

标签： pythonpyqt5qtreeview

Answer 1

我认为你想要的是类似于我正在做的事情如下：

def __itemSingleClicked(self, index):
    ItemIdxs = self.selectedIndexes()[0]
    Item = ItemIdxs.model().itemFromIndex(index)
    if Item.hasChildren():
        Parnt = ItemIdxs.model().itemFromIndex(index).text()
        self.CntrPane.RefrshTreeSelctd(Parnt)
    else:
        Parnt = ItemIdxs.model().itemFromIndex(index).parent().text()
        Child = ItemIdxs.model().itemFromIndex(index).text()
        self.CntrPane.RefrshTreeSelctd(Parnt, Child)

RefrshTreeSelctd 函数要么显示属于父项的所有项，要么只显示属于父项的子项

希望能帮助你走上正确的道路。