从多列（其中一列）开始自动完成

Question

我有多个列的数据（如 "first name"/"surname" 或 "postal code"/"place name"），我现在想要（类似）一个qcompleter 仅从每列的开头匹配。

这意味着输入 "a" 会显示类似“Andrea Miller”或 "John Adams" 的建议，但不会显示 "Jane Doe" 或 "Tom Masters".

有什么实现方法的提示吗？

Answer 1

解决方法是禁用 QCompleter 过滤并使用 QSortFilterProxyModel 进行自定义过滤：

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_())

从多列（其中一列）开始自动完成

Autocomplete from start of (one of) multiple columns

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