python - 如何使用QFileSystemModel过滤多个目录并显示在QTreeView上？

Question

如何使用 QFileSystemModel 过滤 PyQt4 中的多个目录并将它们显示在 QTreeView 上？

我努力

1. 子类QFileSystemModel，但我不知道如何返回rowCount

2. 使用QSortFilterProxyModel -> filterAcceptsRow()，但是很难 返回

3. QFileSystemWatcher 不好。

也许我没有做正确的事。

我是否应该通过win32监控目录并创建自己的模型和节点？

例如1

例如2

---

#!/usr/bin/python

import sys
from functools import partial
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4 import QtGui
from PyQt4 import QtCore


disk = 'C:/'
dir_1 = 'C:/Python27'
dir_1_1 = 'C:/Python27/Lib'
dir_1_1_1 = 'C:/Python27/Lib/bsddb'


class FilterProxyModel(QSortFilterProxyModel):
    def __init__(self):
        super(FilterProxyModel, self).__init__()
        self.count = 0

    def filterAcceptsRow(self, src_row, src_parent):

        src_model = self.sourceModel()
        src_index = src_model.index(src_row, 0, src_parent)

        item_data = src_model.itemData(src_parent)
        # print 'item_data: ', item_data
        item_var = src_index.data(Qt.DisplayRole)
        # print 'item_var: ', item_var

        file_path = src_model.filePath(src_index)
        file_path = str(file_path)
        if disk in file_path:
            # print 'file_path: ', file_path
            if file_path == disk:
                # print 'file_path: ', file_path
                return True

            elif dir_1 == file_path:
                # print 'file_path: ', file_path
                return True

            elif dir_1_1 == file_path:
                # print 'file_path: ', file_path
                return True

            elif dir_1_1_1 == file_path:
                # print 'file_path: ', file_path
                return True

            elif file_path.endswith('.py'):
                print 'file_path: ', file_path
                return True

        return False



class MyQFileSystemModel(QFileSystemModel):
    """docstring for MyQFileSystemModel"""
    def __init__(self, parent=None):
        super(MyQFileSystemModel, self).__init__(parent)

    def columnCount(self, parent):
        return 1


class MyWindow(QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.pathRoot = QDir.rootPath()

        # self.model = QFileSystemModel(self)
        self.model = MyQFileSystemModel(self)
        self.model.setRootPath(self.pathRoot)
        self.model.setNameFilterDisables(0)


        filter = ['*.py', '*mll']
        self.model.setNameFilters(filter)
        self.model.setNameFilterDisables(0)
        # self.model.removeColumn(2)

        self.proxy = FilterProxyModel()
        self.proxy.setSourceModel(self.model)
        self.proxy.setDynamicSortFilter(True)

        self.treeView = QTreeView(self)
        self.treeView.setModel(self.proxy)
        # self.treeView.setRootIndex(self.indexRoot)
        # self.listView = QListView(self)
        # self.listView.setModel(self.proxy)


        self.layout = QHBoxLayout(self)
        self.layout.addWidget(self.treeView)
        # self.layout.addWidget(self.listView)



if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setApplicationName('MyWindow')

    main = MyWindow()
    main.resize(666, 333)

    main.show()

    sys.exit(app.exec_())

我就是这样做的。 最后，我放弃了，我用另一种方法。

Answer 1

我正是在你的情况下，发现了一些东西。诀窍是获取要隐藏的路径列表，然后使用 setHiddenRow 方法将其传递给 treeView。这是我在addWidget方法之前写的

# hide all no desired folders.
foldersToShow = []
for currentDir, dirnames, filenames in os.walk(rootPath): 
    if currentDir in "/folder/I/want/to/show" : #whatever condition you prefer, this is your main filter for what you want to KEEP
        foldersToShow.append(currentDir)
    else:
        index = self.model.index(currentDir)
        self.treeView.setRowHidden(index.row(), index.parent(), True) # what doesnt meet your requirements get to be hidden

从这里开始，有一个问题。由于我不明白的原因，您要保留的文件夹中的文件未显示。但是有一种方法可以显示它们。从每个目录中，将每个文件的 rowHidden 参数设置为 false

# display all files from foldersToShow
for folder in foldersToShow:
    for currentDir, dirnames, filenames in os.walk(folder):
        for filename in filenames:
            filenamePath = os.path.join(currentDir.replace(r"/",'\\'), filename)
            fileId = self.model.index(filenamePath)
            self.treeView.setRowHidden(fileId.row(), fileId.parent(), False)

layout.addWidget(self.treeView)