PyQt5 文件浏览器信号槽：连接 QTreeView 到 QColumnView

Question

我想创建一个小文件浏览器，像这里描述的那样，但我想用PyQt5来实现：Youtube视频描述

到目前为止，布局工作得很好。现在我想实现一个功能，就是在左边的QColumnView中显示文件。这意味着在QTreeView中点击的文件夹里的文件可以在右边的File-QColumnView中看到。我不太明白怎么创建正确的信号，以便为QColumnView的QFileSystemModel设置路径索引。此外，如果我只显示Folder-QTreeView中的一列（文件夹名称），那就更好了。

这是浏览器的代码：

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QTreeView, QFileSystemModel, QApplication, QColumnView, QDockWidget, QMainWindow, QTextEdit
from PyQt5.QtCore import QDir, Qt

rootpath = QDir.currentPath()

class Browser(QMainWindow):
    def __init__(self):
        super(Browser, self).__init__()
        self.createDockWindows()
        self.textEdit = QTextEdit()
        self.setCentralWidget(self.textEdit)
    def createDockWindows(self):
        dock = QDockWidget("Folders", self)
        dock.setAllowedAreas(Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea)
        #Code to Create FileView Colums and FolderTree
        self.FileView = QtWidgets.QColumnView()
        self.FileView.setGeometry(QtCore.QRect(240, 10, 291, 281))
        self.FolderTree = QtWidgets.QTreeView()
        self.FolderTree.setGeometry(QtCore.QRect(10, 10, 221, 281))
        FolderTree = self.FolderTree
        #FolderTree.hidecolumn(1),... ?? to show only name column

        #include FolderTree to a Dock at the left side
        dock.setWidget(FolderTree)
        self.addDockWidget(Qt.LeftDockWidgetArea, dock)
        #set the model and rootpath for filling the FolderTree from self.ui
        dirmodel = QFileSystemModel()
        #set filter to show only folders
        dirmodel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)
        dirmodel.setRootPath(rootpath)
        #filemodel and filter for only files on right side
        filemodel = QFileSystemModel()
        filemodel.setFilter(QDir.NoDotAndDotDot | QDir.Files)
        filemodel.setRootPath(rootpath)
        FolderView = self.FolderTree
        FolderView.setModel(dirmodel)
        FolderView.setRootIndex(dirmodel.index(rootpath))
        FileView = self.FileView
        FileView.setModel(filemodel)
        dock = QDockWidget("Files", self)
        dock.setWidget(FileView)
        self.addDockWidget(Qt.RightDockWidgetArea, dock)

        #important lines for the connection, which does not work    
        self.FolderTree.clicked['QModelIndex'].connect(self.setpathonclick)
    def setpathonclick(self):
        currentpathindex = self.FolderTree.currentIndex()
        self.FileView.setCurrentIndex(currentpathindex)

if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = Browser()
    w.resize(640, 480)
    w.show()
    sys.exit(app.exec_())

最后12行是FolderTree和FileOverView点击连接的重要代码。

Answer 1

你需要在列视图上设置根索引：

    filemodel = QFileSystemModel()
    filemodel.setFilter(QDir.NoDotAndDotDot | QDir.Files)
    filemodel.setRootPath(rootpath)
    ...
    FileView = self.FileView
    FileView.setModel(filemodel)
    FileView.setRootIndex(filemodel.index(rootpath))

然后在点击处理函数中做差不多的事情：

    ...
    self.FolderTree.clicked.connect(self.setpathonclick)

def setpathonclick(self, index):
    rootpath = self.FolderTree.model().filePath(index)
    filemodel = self.FileView.model()
    filemodel.setRootPath(rootpath)
    self.FileView.setRootIndex(filemodel.index(rootpath))