一個目錄中有3個文件夾：f:/root_folder/folder1f:/root_folder/_folder2f:/root_folder/folder3.asset我嘗試自定義 QSortFilterProxyModel.filterAcceptsRow() 僅顯示帶有 .asset 后綴的文件夾。** 我知道我可以使用 QFileSystemModel.setNameFilters([*.asset]) 來做到這一點。但有時它不起作用。我有 Python3.7 + PySide2 5.13.0。# first inherit a QFileSystemModel instance:listModel = QFileSystemModel()# let the instance display only folders, except for '.' and '..':listModel.setFilter(QDir.NoDotAndDotDot | QDir.Dirs)# assgin a root path. i just want the model to search the 'f:/root_folder':listModel.setRootPath("f:/root_folder")# add a custom QSortFilterProxyModel:myProxy = myProxyModel()myProxy.setSourceModel(listModel)# finally show result in a QListView:# 'ui' is a QWidget object that contain a listView widget.ui.listView.setModel(myProxy)ui.listView.setRootIndex(myProxy.mapFromSource(listModel.index("f:/root_folder")))這是自定義的 QSortFilterProxyModel：# test:class myProxyModel(QSortFilterProxyModel): def filterAcceptsRow(self, source_row, source_parent): return True此時，腳本按預期工作：列表中有 3 個文件夾且沒有過濾器。如果我理解正確，“source_parent”應該是“listModel”的 QModelIndex，它指向目錄“f:/root_folder”。并且“source_row”應該是“f:/root_folder”（三個文件夾之一）中某個項目的“序號”。對？然后我添加了自己的過濾器：# first try:class myProxyModel(QSortFilterProxyModel): def filterAcceptsRow(self, source_row, source_parent): source_model = self.sourceModel() # 'source_model' should be the 'listModel', right? source_index = source_model.index(source_row, 0, source_parent) # 'source_index' is a QModelIndex, pointing to 'folder1' or '_folder2' or 'folder3.asset'. # start filtering filename = source_index.data(Qt.DisplayRole) print(filename) # check if filename[-6:] == ".asset": return True else: return False它應該在控制臺上顯示 3 個文件夾名稱，在列表中顯示 1 個文件夾（folder3.asset）。但我得到了非常奇怪的結果！這是控制臺的結果：**它多次列出了我所有的硬盤HDD (F:)root_folderHDD (F:)HDD (E:)HDD (D:)C:HDD (F:)HDD (E:)HDD (D:)C:現在我完全糊涂了。filterAcceptsRow() 到底是做什么的？
2 回答
胡說叔叔
TA貢獻1804條經驗 獲得超8個贊
您只需過濾與 QFileSystemModel 的 rootPath() 關聯的 inde 的子項：
from PySide2 import QtCore, QtGui, QtWidgets
class SuffixDirProxyModel(QtCore.QSortFilterProxyModel):
def __init__(self, parent=None):
super().__init__(parent)
self._suffix = ""
def filterAcceptsRow(self, source_row, source_parent):
source_model = self.sourceModel()
if (
self._suffix
and isinstance(source_model, QtWidgets.QFileSystemModel)
and source_parent == source_model.index(source_model.rootPath())
):
index = source_model.index(source_row, 0, source_parent)
name = index.data(QtWidgets.QFileSystemModel.FileNameRole)
file_info = source_model.fileInfo(index)
return name.split(".")[-1] == self._suffix and file_info.isDir()
return True
@property
def suffix(self):
return self._suffix
@suffix.setter
def suffix(self, s):
self._suffix = s
self.invalidateFilter()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
model = QtWidgets.QFileSystemModel()
model.setFilter(QtCore.QDir.NoDotAndDotDot | QtCore.QDir.Dirs)
path = # "f:/root_folder"
model.setRootPath(path)
proxy = SuffixDirProxyModel()
proxy.suffix = "asset"
proxy.setSourceModel(model)
w = QtWidgets.QListView()
w.setViewMode(QtWidgets.QListView.IconMode)
w.setModel(proxy)
w.setRootIndex(proxy.mapFromSource(model.index(path)))
w.show()
sys.exit(app.exec_())
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