如何在树视图中显示父目录?

问题描述

在我的应用程序中，我有一个 QTreeview.我有一个名为test"的文件夹，其中包含许多子文件夹.树形视图只显示子文件夹而不是它自己的测试文件夹！

In my application I have a QTreeview. I have a folder named "test" that contains many subfolders. The treeview only shows the subfolders not the test forlder it self!

def create_treeview(self):
    self.treeView = QTreeView()
    self.treeView.setMinimumSize(QSize(250, 0))
    self.treeView.setMaximumSize(QSize(250, 16777215))
    self.treeView.setObjectName("treeView")

    self.dirModel = QFileSystemModel()
    self.dirModel.setRootPath(QDir.rootPath())
    self.dirModel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)

    self.treeView.setModel(self.dirModel)
    self.treeView.setRootIndex(self.dirModel.index("/home/data/test"))
    self.treeView.setHeaderHidden(True)
    self.treeView.clicked.connect(self.tree_click)
    return self.treeView

推荐答案

QTreeView 的rootIndex 被隐藏所以不显示.一种可能的解决方案是传递路径的父级并使用 QSortFilterProxyModel 隐藏其他目录和文件.

The rootIndex of the QTreeView is hidden so it is not shown. One possible solution is to pass the parent of the path and use a QSortFilterProxyModel to hide the other directories and files.

import os

from PyQt5.QtCore import pyqtSlot, QDir, QModelIndex, QSize, QSortFilterProxyModel
from PyQt5.QtWidgets import QApplication, QFileSystemModel, QMainWindow, QTreeView


class ProxyModel(QSortFilterProxyModel):
    def __init__(self, parent=None):
        super().__init__(parent)
        self._root_path = ""

    def filterAcceptsRow(self, source_row, source_parent):
        source_model = self.sourceModel()
        if self._root_path and isinstance(source_model, QFileSystemModel):
            root_index = source_model.index(self._root_path).parent()
            if root_index == source_parent:
                index = source_model.index(source_row, 0, source_parent)
                return index.data(QFileSystemModel.FilePathRole) == self._root_path
        return True

    @property
    def root_path(self):
        return self._root_path

    @root_path.setter
    def root_path(self, p):
        self._root_path = p
        self.invalidateFilter()


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.create_treeview()
        self.setCentralWidget(self.treeView)

    def create_treeview(self):

        path = "/home/data/test"

        self.treeView = QTreeView()
        self.treeView.setMinimumSize(QSize(250, 0))
        self.treeView.setMaximumSize(QSize(250, 16777215))
        self.treeView.setObjectName("treeView")

        self.dirModel = QFileSystemModel()
        self.dirModel.setRootPath(QDir.rootPath())
        self.dirModel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)

        root_index = self.dirModel.index(path).parent()

        self.proxy = ProxyModel(self.dirModel)
        self.proxy.setSourceModel(self.dirModel)
        self.proxy.root_path = path

        self.treeView.setModel(self.proxy)

        proxy_root_index = self.proxy.mapFromSource(root_index)
        self.treeView.setRootIndex(proxy_root_index)

        self.treeView.setHeaderHidden(True)
        self.treeView.clicked.connect(self.tree_click)

    @pyqtSlot(QModelIndex)
    def tree_click(self, index):
        ix = self.proxy.mapToSource(index)
        print(
            ix.data(QFileSystemModel.FilePathRole),
            ix.data(QFileSystemModel.FileNameRole),
        )


if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())