如何在PyQt主窗口中创建文件夹视图

Question

我正在尝试实现一个文件夹查看器，用来查看特定路径下的文件夹结构。这个文件夹视图应该像PyQT中的树形控件一样。我知道文件对话框可以帮忙，但我需要把它放在我的主窗口里。
我试着用QTreeWidget来实现这个功能，并使用了递归函数来遍历文件夹，但这样速度太慢了，因为需要在大量文件夹中递归查找。这样做对吗？或者有没有现成的QT解决方案可以解决这个问题？
请查看下面的图片。

Answer 1

对于PyQt5，我写了这个函数：

def load_project_structure(startpath, tree):
    """
    Load Project structure tree
    :param startpath: 
    :param tree: 
    :return: 
    """
    import os
    from PyQt5.QtWidgets import QTreeWidgetItem
    from PyQt5.QtGui import QIcon
    for element in os.listdir(startpath):
        path_info = startpath + "/" + element
        parent_itm = QTreeWidgetItem(tree, [os.path.basename(element)])
        if os.path.isdir(path_info):
            load_project_structure(path_info, parent_itm)
            parent_itm.setIcon(0, QIcon('assets/folder.ico'))
        else:
            parent_itm.setIcon(0, QIcon('assets/file.ico'))

然后我这样调用它：

 load_project_structure("/your/path/here",projectTreeWidget)

结果是这样的：

Answer 2

使用模型和视图。

"""An example of how to use models and views in PyQt4.
Model/view documentation can be found at
http://doc.qt.nokia.com/latest/model-view-programming.html.
"""
import sys

from PyQt4.QtGui import (QApplication, QColumnView, QFileSystemModel,
                         QSplitter, QTreeView)
from PyQt4.QtCore import QDir, Qt

if __name__ == '__main__':
    app = QApplication(sys.argv)
    # Splitter to show 2 views in same widget easily.
    splitter = QSplitter()
    # The model.
    model = QFileSystemModel()
    # You can setRootPath to any path.
    model.setRootPath(QDir.rootPath())
    # List of views.
    views = []
    for ViewType in (QColumnView, QTreeView):
        # Create the view in the splitter.
        view = ViewType(splitter)
        # Set the model of the view.
        view.setModel(model)
        # Set the root index of the view as the user's home directory.
        view.setRootIndex(model.index(QDir.homePath()))
    # Show the splitter.
    splitter.show()
    # Maximize the splitter.
    splitter.setWindowState(Qt.WindowMaximized)
    # Start the main loop.
    sys.exit(app.exec_())