如何使用按钮刷新 ProxyModel 和 tableview？

Question

下面是示例代码。

import sys
from PyQt5 import QtCore, QtWidgets, QtSql, uic


class FilterProxyModel(QtCore.QSortFilterProxyModel):
    def __init__(self, parent=None):
        super().__init__(parent)
        self._filter_value = None

    @property
    def filter_value(self):
        return self._filter_value

    @filter_value.setter
    def filter_value(self, value):
        self._filter_value = value
        self.invalidateFilter()

    def filterAcceptsRow(self, sourceRow, sourceParent):
        if self.filter_value is None:
            return super().filterAcceptsRow(sourceRow, sourceParent)
        if self.filterKeyColumn() >= 0:
            value = (
                self.sourceModel()
                .index(sourceRow, self.filterKeyColumn(), sourceParent)
                .data(self.filterRole())
            )
            return value == self.filter_value

        for column in range(self.columnCount()):
            value = (
                self.sourceModel()
                .index(sourceRow, column, sourceParent)
                .data(self.filterRole())
            )
            if value == self.filter_value:
                return True
        return False

    def setFilterRegExp(self, filter):
        self.filter_value = None
        super().setFilterRegExp(filter)


class UI(QtWidgets.QMainWindow):
    def __init__(self):
        super(UI, self).__init__()
        uic.loadUi("tableview.ui", self)
        self.tableView.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)

        db = QtSql.QSqlDatabase.addDatabase("QSQLITE")
        db.setDatabaseName("book.db")
        db.open()

        self.model = QtSql.QSqlTableModel(self)
        self.model.setTable("card")
        self.model.select()

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

        self.tableView.setModel(self.proxy)
        self.model.select()


        self.refresh.clicked.connect(self.refresh_table)

        r = self.model.record()
        column_names = [r.field(i).name().title() for i in range(r.count())]

        self.comboBox.addItems([x for x in column_names])

        self.horizontalHeader = self.tableView.horizontalHeader()
        self.horizontalHeader.sectionClicked.connect(
            self.tableView_horizontalHeader_sectionClicked
        )
        self.lineEdit.textChanged.connect(self.lineEdit_textChanged)

    def tableView_horizontalHeader_sectionClicked(self, logicalIndex):
        menu = QtWidgets.QMenu(self)

        values = []

        for row in range(self.model.rowCount()):
            value = self.model.index(row, logicalIndex).data(self.proxy.filterRole())
            values.append(value)

        action_all = QtWidgets.QAction("All", self)
        action_all.setData(None)
        menu.addAction(action_all)
        menu.addSeparator()

        for value in sorted(list(set(values))):
            action = QtWidgets.QAction(str(value), self)
            action.setData(value)
            menu.addAction(action)

        headerPos = self.tableView.mapToGlobal(self.horizontalHeader.pos())
        posY = headerPos.y() + self.horizontalHeader.height()
        posX = headerPos.x() + self.horizontalHeader.sectionPosition(logicalIndex)

        action = menu.exec_(QtCore.QPoint(posX, posY))

        if action is not None:
            self.proxy.setFilterKeyColumn(logicalIndex)
            self.proxy.filter_value = action.data()

    def lineEdit_textChanged(self):
        search = QtCore.QRegExp(
            self.lineEdit.text(), QtCore.Qt.CaseInsensitive, QtCore.QRegExp.RegExp
        )
        self.proxy.setFilterKeyColumn(self.comboBox.currentIndex())
        self.proxy.setFilterRegExp(search)



    def refresh_table(self):
        print("refresh")
        


def main():
    app = QtWidgets.QApplication(sys.argv)
    w = UI()
    w.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

我正在使用 FilterProxyModel(QtCore.QSortFilterProxyModel)、QTableView 和 QtSql.QSqlTableModel。我能够过滤行。我的问题是如何刷新 proxymodel 或 tableview 以显示带有按钮的所有行。根据上图，使用 qmenu 过滤了行。现在我想在单击 Qpushbutton 后刷新并显示所有行，我想用菜单选项和 Qpushbutton 显示所有行。可以刷新吗，怎么办？

Answer 1

如果要删除过滤器，则必须将 None 设置为 filter_value:

def refresh_table(self):
    self.proxy.filter_value = None

如何使用按钮刷新 ProxyModel 和 tableview？

How to refresh ProxyModel and tableview with Pushbutton?

python

python-3.x

pyqt5

qsortfilterproxymodel