使用QFileSystemModel展开QTreeView中的项目

Question

用户单击按钮时，我需要转到某个目录。

用户在QInputDialog中输入路径（例如，Linux上的/ mnt / data / Music），然后程序转到该目录，例如Midnight Commander中的Mc或Ranger中的cd，但是我不知道该怎么做...我早已熟识所有文档

main.py

import sys
from PyQt5 import QtWidgets, QtCore
from PyQt5.QtWidgets import QMainWindow, QInputDialog
import exampleQTV

class PyMap(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.search.clicked.connect(self.searchAction)

    def searchAction(self):
        text, ok = QInputDialog.getText(self, "Go to", "Enter path")
        if ok:
            path = text.split("/")

        for item in path:
            if item != "":
                print("ITEM:", item)
                self.leftView.keyboardSearch(item)
                self.leftView.setExpanded(self.leftView.currentIndex(), True)
                print("currentIndex():",self.leftView.model.filePath(self.leftView.currentIndex()))
                child = self.leftView.currentIndex().child(0,0)
                print("child:", self.leftView.model.filePath(child))

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.leftView = exampleQTV.exampleQTV()
        self.leftView.setObjectName("leftView")
        self.gridLayout.addWidget(self.leftView, 1, 0, 1, 1)
        self.search = QtWidgets.QPushButton(self.centralwidget)
        self.search.setObjectName("select")
        self.gridLayout.addWidget(self.search, 0, 0, 1, 2)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.search.setText(_translate("MainWindow", "Search"))


def main():
    app = QtWidgets.QApplication(sys.argv)
    window = PyMap()
    window.show()
    app.exec_()


if __name__ == '__main__':
    main()

exampleQTV.py

from PyQt5.QtWidgets import QTreeView, QFileSystemModel
from PyQt5.QtCore import QDir

class exampleQTV(QTreeView):
    def __init__(self):
        QTreeView.__init__(self)
        self.model = QFileSystemModel()
        self.model.setRootPath(QDir.rootPath())
        self.setModel(self.model)
        self.eventCalled = False
        self.requestForEscape = False

        self.setColumnHidden(1, True)
        self.setColumnHidden(2, True)
        self.setColumnHidden(3, True)
        self.expandAll()

Answer 1

如果要扩展项目，则必须扩展祖先，在以下代码中实现该逻辑：

import sys

from PyQt5 import QtCore, QtWidgets


def expandPath(index, view):
    if not index.isValid():
        return
    indexes = []
    ix = index
    while ix.isValid():
        indexes.insert(0, ix)
        ix = ix.parent()
    for ix in indexes:
        view.expand(ix)


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)

    model = QtWidgets.QFileSystemModel()
    model.setRootPath(QtCore.QDir.rootPath())
    view = QtWidgets.QTreeView()

    view.setModel(model)
    view.setRootIndex(model.index(QtCore.QDir.rootPath()))
    doc_directory = QtCore.QStandardPaths.writableLocation(
        QtCore.QStandardPaths.DocumentsLocation
    )
    ix = model.index(doc_directory)
    expandPath(ix, view)
    view.resize(640, 480)
    for i in (1, 2, 3):
        view.setColumnHidden(i, True)
    view.show()
    sys.exit(app.exec_())