从多个列的（其中一个）开始自动完成

Question

我有多个列的数据（如“名字”/“姓氏”或“邮政编码”/“地名”），现在我想有一个（如）qcompleter，它只匹配每一列的开头

这意味着输入“a”将显示类似“andrea Miller”或“Johnadams”的建议，而不是“Jane Doe”或“Tom Masters”

如何实现这个有什么提示吗

Answer 1

解决方法是禁用QCompleter筛选并使用QSortFilterProxyModel执行自定义筛选：

import sys


from PySide2 import QtCore, QtWidgets


class FilterModel(QtCore.QSortFilterProxyModel):
    def __init__(self, parent=None):
        super().__init__(parent)
        self._prefix = ""

    @property
    def prefix(self):
        return self._prefix

    @prefix.setter
    def prefix(self, prefix):
        self._prefix = prefix.lower()
        self.invalidateFilter()

    def filterAcceptsRow(self, sourceRow, sourceParent):
        if not self.prefix:
            return True
        text = (
            self.sourceModel()
            .index(sourceRow, self.filterKeyColumn(), sourceParent)
            .data()
        )
        for word in text.split():
            if word.lower().startswith(self.prefix):
                return True
        return False


class Completer(QtWidgets.QCompleter):
    def setModel(self, model):
        proxy_internal_model = FilterModel(self)
        proxy_internal_model.setSourceModel(model)
        model.setParent(proxy_internal_model)
        super().setModel(proxy_internal_model)

    def splitPath(self, path):
        if isinstance(self.model(), FilterModel):
            self.model().prefix = path
        return [""]


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    w = QtWidgets.QLineEdit()
    texts = ["Andrea Miller", "John Adams", "Jane Doe", "Tom Masters"]
    completer = Completer(w)
    completer.setModel(QtCore.QStringListModel(texts, w))
    w.setCompleter(completer)
    w.show()
    sys.exit(app.exec_())