我几乎逐字地在PyQt5上重新实现了这个例子。此示例中的问题是：它假定您在模型中输入QDate，但在我的情况下，模型来自sqlite DB，因此日期只是文本。
from PyQt5.QtCore import (QDate, QDateTime, QRegExp, QSortFilterProxyModel, Qt,
QTime)
from PyQt5.QtGui import QStandardItemModel
from PyQt5.QtWidgets import (QApplication, QCheckBox, QComboBox, QDateEdit,
QGridLayout, QGroupBox, QHBoxLayout, QLabel, QLineEdit, QTreeView,
QVBoxLayout, QWidget,QTableView)
class MySortFilterProxyModel(QSortFilterProxyModel):
def __init__(self, parent=None):
super(MySortFilterProxyModel, self).__init__(parent)
self.minDate = QDate()
self.maxDate = QDate()
def setFilterMinimumDate(self, date):
self.minDate = date
self.invalidateFilter()
def filterMinimumDate(self):
return self.minDate
def setFilterMaximumDate(self, date):
self.maxDate = date
self.invalidateFilter()
def filterMaximumDate(self):
return self.maxDate
def filterAcceptsRow(self, sourceRow, sourceParent):
index0 = self.sourceModel().index(sourceRow, 0, sourceParent)
index1 = self.sourceModel().index(sourceRow, 1, sourceParent)
index2 = self.sourceModel().index(sourceRow, 2, sourceParent)
return ((self.filterRegExp().indexIn(self.sourceModel().data(index0)) >= 0
or self.filterRegExp().indexIn(self.sourceModel().data(index1)) >= 0)
and self.dateInRange(self.sourceModel().data(index2)))
def dateInRange(self, date):
if isinstance(date, QDateTime):
date = date.date()
return ((not self.minDate.isValid() or date >= self.minDate)
and (not self.maxDate.isValid() or date <= self.maxDate))
class Window(QWidget):
def __init__(self):
super(Window, self).__init__()
self.proxyModel = MySortFilterProxyModel(self)
self.proxyModel.setDynamicSortFilter(True)
self.sourceView = QTreeView()
self.sourceView.setRootIsDecorated(False)
self.sourceView.setAlternatingRowColors(True)
sourceLayout = QHBoxLayout()
sourceLayout.addWidget(self.sourceView)
sourceGroupBox = QGroupBox("Original Model")
sourceGroupBox.setLayout(sourceLayout)
self.filterCaseSensitivityCheckBox = QCheckBox("Case sensitive filter")
self.filterCaseSensitivityCheckBox.setChecked(True)
self.filterPatternLineEdit = QLineEdit()
self.filterPatternLineEdit.setText("Grace|Sports")
filterPatternLabel = QLabel("&Filter pattern:")
filterPatternLabel.setBuddy(self.filterPatternLineEdit)
self.filterSyntaxComboBox = QComboBox()
self.filterSyntaxComboBox.addItem("Regular expression", QRegExp.RegExp)
self.filterSyntaxComboBox.addItem("Wildcard", QRegExp.Wildcard)
self.filterSyntaxComboBox.addItem("Fixed string", QRegExp.FixedString)
self.fromDateEdit = QDateEdit()
self.fromDateEdit.setDate(QDate(2006, 12, 22))
self.fromDateEdit.setCalendarPopup(True)
fromLabel = QLabel("F&rom:")
fromLabel.setBuddy(self.fromDateEdit)
self.toDateEdit = QDateEdit()
self.toDateEdit.setDate(QDate(2007, 1, 5))
self.toDateEdit.setCalendarPopup(True)
toLabel = QLabel("&To:")
toLabel.setBuddy(self.toDateEdit)
self.filterPatternLineEdit.textChanged.connect(self.textFilterChanged)
self.filterSyntaxComboBox.currentIndexChanged.connect(self.textFilterChanged)
self.filterCaseSensitivityCheckBox.toggled.connect(self.textFilterChanged)
self.fromDateEdit.dateChanged.connect(self.dateFilterChanged)
self.toDateEdit.dateChanged.connect(self.dateFilterChanged)
self.proxyView = QTableView()
# self.proxyView.setRootIsDecorated(False)
self.proxyView.setAlternatingRowColors(True)
self.proxyView.setModel(self.proxyModel)
self.proxyView.setSortingEnabled(True)
self.proxyView.sortByColumn(1, Qt.AscendingOrder)
self.textFilterChanged()
self.dateFilterChanged()
proxyLayout = QGridLayout()
proxyLayout.addWidget(self.proxyView, 0, 0, 1, 3)
proxyLayout.addWidget(filterPatternLabel, 1, 0)
proxyLayout.addWidget(self.filterPatternLineEdit, 1, 1)
proxyLayout.addWidget(self.filterSyntaxComboBox, 1, 2)
proxyLayout.addWidget(self.filterCaseSensitivityCheckBox, 2, 0, 1, 3)
proxyLayout.addWidget(fromLabel, 3, 0)
proxyLayout.addWidget(self.fromDateEdit, 3, 1, 1, 2)
proxyLayout.addWidget(toLabel, 4, 0)
proxyLayout.addWidget(self.toDateEdit, 4, 1, 1, 2)
proxyGroupBox = QGroupBox("Sorted/Filtered Model")
proxyGroupBox.setLayout(proxyLayout)
mainLayout = QVBoxLayout()
mainLayout.addWidget(sourceGroupBox)
mainLayout.addWidget(proxyGroupBox)
self.setLayout(mainLayout)
self.setWindowTitle("Custom Sort/Filter Model")
self.resize(500, 450)
def setSourceModel(self, model):
self.proxyModel.setSourceModel(model)
self.sourceView.setModel(model)
def textFilterChanged(self):
syntax = QRegExp.PatternSyntax(
self.filterSyntaxComboBox.itemData(
self.filterSyntaxComboBox.currentIndex()))
caseSensitivity = (
self.filterCaseSensitivityCheckBox.isChecked()
and Qt.CaseSensitive or Qt.CaseInsensitive)
regExp = QRegExp(self.filterPatternLineEdit.text(), caseSensitivity, syntax)
self.proxyModel.setFilterRegExp(regExp)
def dateFilterChanged(self):
self.proxyModel.setFilterMinimumDate(self.fromDateEdit.date())
self.proxyModel.setFilterMaximumDate(self.toDateEdit.date())
def addMail(model, subject, sender, date):
model.insertRow(0)
model.setData(model.index(0, 0), subject)
model.setData(model.index(0, 1), sender)
model.setData(model.index(0, 2), date)
def createMailModel(parent):
model = QStandardItemModel(0, 3, parent)
model.setHeaderData(0, Qt.Horizontal, "Subject")
model.setHeaderData(1, Qt.Horizontal, "Sender")
model.setHeaderData(2, Qt.Horizontal, "Date")
addMail(model, "Happy New Year!", "Grace K. <[email protected]>",
QDateTime(QDate(2006, 12, 31), QTime(17, 3)))
addMail(model, "Radically new concept", "Grace K. <[email protected]>",
QDateTime(QDate(2006, 12, 22), QTime(9, 44)))
addMail(model, "Accounts", "[email protected]",
QDateTime(QDate(2006, 12, 31), QTime(12, 50)))
addMail(model, "Expenses", "Joe Bloggs <[email protected]>",
QDateTime(QDate(2006, 12, 25), QTime(11, 39)))
addMail(model, "Re: Expenses", "Andy <[email protected]>",
QDateTime(QDate(2007, 1, 2), QTime(16, 5)))
addMail(model, "Re: Accounts", "Joe Bloggs <[email protected]>",
QDateTime(QDate(2007, 1, 3), QTime(14, 18)))
addMail(model, "Re: Accounts", "Andy <[email protected]>",
QDateTime(QDate(2007, 1, 3), QTime(14, 26)))
addMail(model, "Sports", "Linda Smith <[email protected]>",
QDateTime(QDate(2007, 1, 5), QTime(11, 33)))
addMail(model, "AW: Sports", "Rolf Newschweinstein <[email protected]>",
QDateTime(QDate(2007, 1, 5), QTime(12, 0)))
addMail(model, "RE: Sports", "Petra Schmidt <[email protected]>",
QDateTime(QDate(2007, 1, 5), QTime(12, 1)))
return model
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
window = Window()
window.setSourceModel(createMailModel(window))
window.show()
sys.exit(app.exec_())
我试图改变这一行：self.dateInRange(self.sourceModel().data(index2)))到这个：self.dateInRange(datetime.strptime(self.sourceModel().data(index2),"%Y/%m/%d %H:%M")))，以便将数据TXT转换为格式日期，这适用于过滤，但如果我使用以下方法向数据库添加新行，则会崩溃：
@pyqtSlot()
def on_pushButton_clicked(self):
self.add_record()
def add_record(self):
row = self.db_model.rowCount()
self.db_model.insertRow(row)
我哪里错了？
相关数据库部分：
class essaiFindDb():
def __init__(self):
self.db = QSqlDatabase.addDatabase("QSQLITE")
self.db.setDatabaseName("essai_find_database.db")
self.db.open()
query = QSqlQuery()
query.exec_('''CREATE TABLE Pilots_exp(id INTEGER PRIMARY KEY UNIQUE , pilot_1 TEXT,aircraft TEXT, date_time1 TEXT, date_time2 TEXT, total TEXT)''')
由于您尚未提供MCVE，因此无法分析问题。
所以我的解决方案将基于你指出的：
%Y/%m/%d %H:%M（python日期时间格式） - yyyy/MM/dd hh:mm（Qt格式）正如您所注意到的，最简单的事情是如果第3列和第4列是QDateTime，那么我将创建一个代理来进行转换。
另一方面，我已将过滤器分为时间过滤器和文本过滤器以使代码更清晰。
在这种情况下，我将应用级联代理：
┌-----------------┐ ┌---------------------------┐ ┌------------------------┐ ┌------------------------┐
| db_model | -> | text_to_QDateTime | -> | filter_date | -> | filter_text |
|(QSqlTableModel) | | (ConvertToDateProxyModel) | | (FilterDateProxyModel) | | (FilterTextProxyModel) |
└-----------------┘ └---------------------------┘ └------------------------┘ └------------------------┘
考虑到上述情况，解决方案是：
from PyQt5 import QtCore, QtGui, QtWidgets, QtSql
def createConnection():
db = QtSql.QSqlDatabase.addDatabase('QSQLITE')
db.setDatabaseName('essai_find_database.db')
if not db.open():
QtWidgets.QMessageBox.critical(None, QtWidgets.qApp.tr("Cannot open database"),
QtWidgets.qApp.tr("Unable to establish a database connection.\n"
"This example needs SQLite support. Please read "
"the Qt SQL driver documentation for information "
"how to build it.\n\n"
"Click Cancel to exit."),
QtWidgets.QMessageBox.Cancel)
return False
query = QtSql.QSqlQuery()
return query.exec_('''
CREATE TABLE IF NOT EXISTS Pilots_exp (
id INTEGER PRIMARY KEY UNIQUE ,
pilot_1 TEXT,aircraft TEXT,
date_time1 TEXT, date_time2 TEXT,
total TEXT)
''')
class ConvertToDateProxyModel(QtCore.QIdentityProxyModel):
def __init__(self, parent=None):
super(ConvertToDateProxyModel, self).__init__(parent)
self._columns = []
self._fmt = ""
def set_format(self, fmt):
self._fmt = fmt
def set_columns(self, columns):
self._columns = columns
def data(self, index, role=QtCore.Qt.DisplayRole):
v = super(ConvertToDateProxyModel, self).data(index, role)
if not index.isValid():
return
if index.column() in self._columns and self._fmt:
return QtCore.QDateTime.fromString(v, self._fmt)
return v
def setData(self, index, value, role=QtCore.Qt.EditRole):
if index.column() in self._columns and self._fmt:
sm = self.sourceModel()
ix = self.mapToSource(index)
return sm.setData(ix, value.toString(self._fmt), role)
return super(ConvertToDateProxyModel, self).setData(index, value, role)
class FilterDateProxyModel(QtCore.QSortFilterProxyModel):
def __init__(self, parent=None):
super(FilterDateProxyModel, self).__init__(parent)
self._from_date, self._to_date = QtCore.QDate(), QtCore.QDate()
def setRange(self, from_date, to_date):
self._from_date = from_date
self._to_date = to_date
self.invalidateFilter()
def filterAcceptsRow(self, sourceRow, sourceParent):
if any([not date.isValid() for date in (self._from_date, self._to_date,)]):
return True
ix = self.sourceModel().index(sourceRow, self.filterKeyColumn(), sourceParent)
dt = ix.data().date()
return self._from_date <= dt <= self._to_date
class FilterTextProxyModel(QtCore.QSortFilterProxyModel):
def __init__(self, parent=None):
super(FilterTextProxyModel, self).__init__(parent)
self._columns = []
def set_columns(self, columns):
self._columns = columns
self.invalidateFilter()
def filterAcceptsRow(self, sourceRow, sourceParent):
if not self._columns:
return True
values = []
for c in range(self.sourceModel().columnCount()):
if c in self._columns:
ix = self.sourceModel().index(sourceRow, c, sourceParent)
values.append(self.filterRegExp().indexIn(ix.data()) >= 0)
return any(values)
class AddDialog(QtWidgets.QDialog):
def __init__(self, formats, parent=None):
super(AddDialog, self).__init__(parent)
self._editors = dict()
flay = QtWidgets.QFormLayout(self)
for key, value in formats.items():
editor = self.create_editor_by_type(value)
flay.addRow(key, editor)
self._editors[key] = editor
buttonBox = QtWidgets.QDialogButtonBox()
buttonBox.setOrientation(QtCore.Qt.Horizontal)
buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
buttonBox.accepted.connect(self.accept)
buttonBox.rejected.connect(self.reject)
flay.addRow(buttonBox)
def create_editor_by_type(self, t):
editor = QtWidgets.QLineEdit()
if t == QtCore.QDateTime:
editor = QtWidgets.QDateTimeEdit(
dateTime= QtCore.QDateTime.currentDateTime(),
displayFormat="yyyy/MM/dd hh:mm",
calendarPopup=True
)
return editor
def get_value_from_editor(self, editor):
if isinstance(editor, QtWidgets.QLineEdit):
return editor.text()
if isinstance(editor, QtWidgets.QDateTimeEdit):
return editor.dateTime()
def get_values(self):
result = dict()
for key, editor in self._editors.items():
result[key] = self.get_value_from_editor(editor)
return result
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.db_model = QtSql.QSqlTableModel(self)
self.db_model.setTable("Pilots_exp")
self.db_model.select()
proxy_convert_to_date = ConvertToDateProxyModel(self)
proxy_convert_to_date.setSourceModel(self.db_model)
proxy_convert_to_date.set_columns([3, 4])
proxy_convert_to_date.set_format("yyyy/MM/dd hh:mm")
sourceGroupBox = QtWidgets.QGroupBox("Original Model")
sourceView = QtWidgets.QTableView(alternatingRowColors=True)
sourceView.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
sourceView.verticalHeader().hide()
sourceView.setModel(proxy_convert_to_date)
sourceLayout = QtWidgets.QHBoxLayout(sourceGroupBox)
sourceLayout.addWidget(sourceView)
self._proxy_date = FilterDateProxyModel(self)
self._proxy_date.setFilterKeyColumn(3)
self._proxy_date.setSourceModel(proxy_convert_to_date)
self._proxy_filter = FilterTextProxyModel(self)
self._proxy_filter.setSourceModel(self._proxy_date)
self._proxy_filter.set_columns([1, 2])
proxyGroupBox = QtWidgets.QGroupBox("Sorted/Filtered Model")
proxyView = QtWidgets.QTableView()
proxyView.verticalHeader().hide()
proxyView.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
proxyView.setSortingEnabled(True)
proxyView.setModel(self._proxy_filter)
proxyView.sortByColumn(1, QtCore.Qt.AscendingOrder)
proxyLayout = QtWidgets.QVBoxLayout(proxyGroupBox)
proxyLayout.addWidget(proxyView)
filterPatternLabel = QtWidgets.QLabel("&Filter pattern:")
self.filterPatternLineEdit = QtWidgets.QLineEdit(
"Grace|Sports",
textChanged=self.update_filter_text
)
filterPatternLabel.setBuddy(self.filterPatternLineEdit)
self.filterSyntaxComboBox = QtWidgets.QComboBox(
currentIndexChanged=self.update_filter_text
)
self.filterCaseSensitivityCheckBox = QtWidgets.QCheckBox(
"Case sensitive filter",
checked=True,
stateChanged=self.update_filter_text
)
self.fromDateEdit = QtWidgets.QDateEdit(
calendarPopup=True,
date=QtCore.QDate(2006, 12, 22),
dateChanged=self.update_filter_date
)
self.toDateEdit = QtWidgets.QDateEdit(
calendarPopup=True,
date=QtCore.QDate(2007, 1, 5),
dateChanged=self.update_filter_date
)
self.filterSyntaxComboBox.addItem("Regular expression", QtCore.QRegExp.RegExp)
self.filterSyntaxComboBox.addItem("Wildcard", QtCore.QRegExp.Wildcard)
self.filterSyntaxComboBox.addItem("Fixed string", QtCore.QRegExp.FixedString)
self.update_filter_text()
self.update_filter_date()
flay = QtWidgets.QFormLayout()
flay.addRow("F&rom:", self.fromDateEdit)
flay.addRow("&To:", self.toDateEdit)
hlay = QtWidgets.QHBoxLayout()
hlay.addWidget(filterPatternLabel)
hlay.addWidget(self.filterPatternLineEdit)
hlay.addWidget(self.filterSyntaxComboBox)
proxyLayout.addWidget(self.filterCaseSensitivityCheckBox)
proxyLayout.addLayout(hlay)
proxyLayout.addLayout(flay)
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(sourceGroupBox)
lay.addWidget(proxyGroupBox)
proxyView.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
proxyView.customContextMenuRequested.connect(self.on_customContextMenuRequested)
@QtCore.pyqtSlot(QtCore.QPoint)
def on_customContextMenuRequested(self, p):
view = self.sender()
menu = QtWidgets.QMenu()
add_row_action = menu.addAction("Add Row")
action = menu.exec_(view.viewport().mapToGlobal(p))
if action == add_row_action:
self.add_record()
@QtCore.pyqtSlot()
def update_filter_text(self):
syntax = self.filterSyntaxComboBox.currentData()
caseSensitivity = QtCore.Qt.CaseSensitive \
if self.filterCaseSensitivityCheckBox.isChecked() \
else QtCore.Qt.CaseInsensitive
regExp = QtCore.QRegExp(self.filterPatternLineEdit.text(), caseSensitivity, syntax)
self._proxy_filter.setFilterRegExp(regExp)
@QtCore.pyqtSlot()
def update_filter_date(self):
self._proxy_date.setRange(self.fromDateEdit.date(), self.toDateEdit.date())
def add_record(self):
d = {}
rec = self.db_model.record()
for i in range(rec.count()):
d[rec.fieldName(i)] = type(rec.value(i))
for i in (3, 4): d[rec.fieldName(i)] = QtCore.QDateTime
del d[rec.fieldName(0)]
dialog = AddDialog(d, self)
if dialog.exec_() == QtWidgets.QDialog.Accepted:
results = dialog.get_values()
for i in (3, 4):
k = rec.fieldName(i)
results[k] = results[k].toString("yyyy/MM/dd hh:mm")
for k, value in results.items():
rec.setValue(k, value)
self.db_model.insertRecord(-1, rec)
self.db_model.select()
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
if not createConnection():
sys.exit(-1)
w = Widget()
w.resize(960, 480)
w.show()
sys.exit(app.exec_())