Question

我正在寻找QstandardItemModel自然排序方法。我正在阅读一些相关的问题并尝试我的代码。但它不起作用

我的工具通过拖放接受某些文件列表。我想通过自然排序对我的模型数据进行排序。并把它放到listview。

所以这是我的代码：

class VideolistView (QtWidgets.QListView):
    def __init__(self, parent):
        super(VideolistView, self).__init__(parent)
        self.setAcceptDrops(True)
        self.setObjectName("VideolistView")
        self.setGeometry(QtCore.QRect(8, 30, 250, 301))
        self.Model = QtGui.QStandardItemModel(self)

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()

            for url in event.mimeData().urls():
                dropitem = str(url.toLocalFile())
                Fname = os.path.split(dropitem)
                if not self.Model.findItems(Fname[1]):
                    listitem = QtGui.QStandardItem(Fname[1])
                    self.Model.appendRow(listitem)
            self.Model.sort(0)
            self.setModel(self.Model)
        else:
            event.ignore()

我的一些尝试宣布。

import re

def _human_key(key):
    parts = re.split('(\d*\.\d+|\d+)', key)
    return tuple((e.swapcase() if i % 2 == 0 else float(e))
            for i, e in enumerate(parts))
   ......

    listitems=[]
         for url in event.mimeData().urls():
             dropitem = str(url.toLocalFile())
             Fname = os.path.split(dropitem)
             listitem = QtGui.QStandardItem(Fname[1])
             listitems.appent(listitem)
    listitems.sort(key=_human_key)

Pycharm调试错误listitems.sort（key = _human_key）我尝试重新实现QstandardItemModel类

import re

def _human_key(key):
    parts = re.split('(\d*\.\d+|\d+)', key)
    return tuple((e.swapcase() if i % 2 == 0 else float(e))
            for i, e in enumerate(parts))
   ......

Class NaturalSortModel (QtGui.QstandardItemModel)
    def __lt__(self, other):
        column = self.treeWidget().sortColumn()
        k1 = self.text(column)
        k2 = other.text(column)
        return _human_key(k1) < _human_key(k2)
               .......
Class VideolistView (QtWidgets.QListView)
    def __init__(self, parent):
       self.Model = self.NaturalSortModel(self)

               ........
            self.Model.appendRow(listitem)
        self.Model.sort(0)
        self.setModel(self.Model)
                ........

以上两个代码错误。我如何使用QstandardItemModel自然排序？

link：Python - Human sort of numbers with alpha numeric, but in pyQt and a __lt__ operator

使用@eyllanesc答案，使用QSortFilterProxyModel的第一个解决方案效果很好。它按自然顺序对数据进行排序。

但@eyllanesc第二个建议（Qstandarditem继承）对我不起作用。它按字母顺序排序就像原始来源一样。 @eyllanesc非常感谢!!!

Answer 1

如果您想要建立特定的订单标准，您必须通过继承自QSortFilterProxyModel的模型来实现，并实现方法lessThan，如下所示：

class NaturalSortFilterProxyModel(QtCore.QSortFilterProxyModel):
    @staticmethod
    def _human_key(key):
        parts = re.split('(\d*\.\d+|\d+)', key)
        return tuple((e.swapcase() if i % 2 == 0 else float(e)) for i, e in enumerate(parts))

    def lessThan(self, left, right):
        leftData = self.sourceModel().data(left)
        rightData = self.sourceModel().data(right)
        return self._human_key(leftData) < self._human_key(rightData)

class VideolistView (QtWidgets.QListView):
    def __init__(self, parent=None):
        super(VideolistView, self).__init__(parent)
        self.setAcceptDrops(True)
        self.setObjectName("VideolistView")
        self.setGeometry(QtCore.QRect(8, 30, 250, 301))
        model = QtGui.QStandardItemModel(self)
        proxyModel = NaturalSortFilterProxyModel()
        proxyModel.setSourceModel(model)
        proxyModel.sort(0, QtCore.Qt.AscendingOrder)
        self.setModel(proxyModel)

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls():
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls():
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls():
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()

            for url in event.mimeData().urls():
                dropitem = str(url.toLocalFile())
                Fname = os.path.split(dropitem)
                if not self.model().sourceModel().findItems(Fname[1]):
                    listitem = QtGui.QStandardItem(Fname[1])
                    self.model().sourceModel().appendRow(listitem)
        else:
            event.ignore()

正如@ekhumuro所说，链接中显示的解决方案是指创建一个继承自QStandardItem的类，如下所示

class NaturalStandardItem(QtGui.QStandardItem):
    @staticmethod
    def _human_key(key):
        parts = re.split('(\d*\.\d+|\d+)', key)
        return tuple((e.swapcase() if i % 2 == 0 else float(e)) for i, e in enumerate(parts))
    def __lt__(self, other):
        return self._human_key(self.text()) < self._human_key(other.text())


class VideolistView (QtWidgets.QListView):
    def __init__(self, parent=None):
        super(VideolistView, self).__init__(parent)
        self.setAcceptDrops(True)
        self.setObjectName("VideolistView")
        self.setGeometry(QtCore.QRect(8, 30, 250, 301))
        model = QtGui.QStandardItemModel(self)
        self.setModel(model)


    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls():
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls():
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls():
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()

            for url in event.mimeData().urls():
                dropitem = str(url.toLocalFile())
                Fname = os.path.split(dropitem)
                if not self.model().findItems(Fname[1]):
                    listitem = NaturalStandardItem(Fname[1])
                    self.model().appendRow(listitem)
            self.model().sort(0)

        else:
            event.ignore()

python QstandardItemModel自然排序

1 个答案: