我有以下代码来获取QTableView的过滤器。但我无法一次过滤多个列。
即,如果使用row 0 col 0
过滤第2列并尝试过滤第2列,则应仅显示column 2
的可见唯一值(可能仅显示row 0 col 1
)但现在它显示column 2
的所有元素(row 0 col 1
,row 1 col 1
,row 2 col 1
)
#-*- coding:utf-8 -*-
from PyQt4 import QtCore, QtGui
class myWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
super(myWindow, self).__init__(parent)
self.centralwidget = QtGui.QWidget(self)
self.lineEdit = QtGui.QLineEdit(self.centralwidget)
self.view = QtGui.QTableView(self.centralwidget)
self.comboBox = QtGui.QComboBox(self.centralwidget)
self.label = QtGui.QLabel(self.centralwidget)
self.gridLayout = QtGui.QGridLayout(self.centralwidget)
self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
self.gridLayout.addWidget(self.view, 1, 0, 1, 3)
self.gridLayout.addWidget(self.comboBox, 0, 2, 1, 1)
self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
self.setCentralWidget(self.centralwidget)
self.label.setText("Regex Filter")
self.model = QtGui.QStandardItemModel(self)
for rowName in range(3) * 5:
self.model.invisibleRootItem().appendRow(
[ QtGui.QStandardItem("row {0} col {1}".format(rowName, column))
for column in range(3)
]
)
self.proxy = QtGui.QSortFilterProxyModel(self)
self.proxy.setSourceModel(self.model)
self.view.setModel(self.proxy)
self.comboBox.addItems(["Column {0}".format(x) for x in range(self.model.columnCount())])
self.lineEdit.textChanged.connect(self.on_lineEdit_textChanged)
self.comboBox.currentIndexChanged.connect(self.on_comboBox_currentIndexChanged)
self.horizontalHeader = self.view.horizontalHeader()
self.horizontalHeader.sectionClicked.connect(self.on_view_horizontalHeader_sectionClicked)
@QtCore.pyqtSlot(int)
def on_view_horizontalHeader_sectionClicked(self, logicalIndex):
self.logicalIndex = logicalIndex
self.menuValues = QtGui.QMenu(self)
self.signalMapper = QtCore.QSignalMapper(self)
self.comboBox.blockSignals(True)
self.comboBox.setCurrentIndex(self.logicalIndex)
self.comboBox.blockSignals(True)
valuesUnique = [ self.model.item(row, self.logicalIndex).text()
for row in range(self.model.rowCount())
]
actionAll = QtGui.QAction("All", self)
actionAll.triggered.connect(self.on_actionAll_triggered)
self.menuValues.addAction(actionAll)
self.menuValues.addSeparator()
for actionNumber, actionName in enumerate(sorted(list(set(valuesUnique)))):
action = QtGui.QAction(actionName, self)
self.signalMapper.setMapping(action, actionNumber)
action.triggered.connect(self.signalMapper.map)
self.menuValues.addAction(action)
self.signalMapper.mapped.connect(self.on_signalMapper_mapped)
headerPos = self.view.mapToGlobal(self.horizontalHeader.pos())
posY = headerPos.y() + self.horizontalHeader.height()
posX = headerPos.x() + self.horizontalHeader.sectionPosition(self.logicalIndex)
self.menuValues.exec_(QtCore.QPoint(posX, posY))
@QtCore.pyqtSlot()
def on_actionAll_triggered(self):
filterColumn = self.logicalIndex
filterString = QtCore.QRegExp( "",
QtCore.Qt.CaseInsensitive,
QtCore.QRegExp.RegExp
)
self.proxy.setFilterRegExp(filterString)
self.proxy.setFilterKeyColumn(filterColumn)
@QtCore.pyqtSlot(int)
def on_signalMapper_mapped(self, i):
stringAction = self.signalMapper.mapping(i).text()
filterColumn = self.logicalIndex
filterString = QtCore.QRegExp( stringAction,
QtCore.Qt.CaseSensitive,
QtCore.QRegExp.FixedString
)
self.proxy.setFilterRegExp(filterString)
self.proxy.setFilterKeyColumn(filterColumn)
@QtCore.pyqtSlot(str)
def on_lineEdit_textChanged(self, text):
search = QtCore.QRegExp( text,
QtCore.Qt.CaseInsensitive,
QtCore.QRegExp.RegExp
)
self.proxy.setFilterRegExp(search)
@QtCore.pyqtSlot(int)
def on_comboBox_currentIndexChanged(self, index):
self.proxy.setFilterKeyColumn(index)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
main = myWindow()
main.show()
main.resize(400, 600)
sys.exit(app.exec_())
当我运行上面的代码时,我得到以下输出
当我点击第2列标题时,显示的过滤器列表如下所示并正确显示(该列中的唯一值)...
当我在显示的过滤器中选择row 0 col 1
时,我会得到以下过滤列表
但是,当我单击第2列标题进行过滤时,它会显示与第1张图像相同的列表。第2列的所有唯一项目(从模型视图)而不是来自proxyfilter。实际上它只应显示row 0 col 1
,因为第2列中的唯一项目仅为row 0 col 1
答案 0 :(得分:1)
这是因为您仍在使用源模型来查找行。原始模型中的数据不会更改。只有过滤器代理模型才会反映过滤后的更改。
因此,您只需要在(真正长命名的)on_view_horizontalHeader_sectionClicked
广告位中修改您的查询:
valuesUnique = [
self.proxy.index(row, self.logicalIndex).data().toString()
for row in xrange(self.proxy.rowCount())
]
您还可以删除一组唯一设置的转化:
valuesUnique = set(
self.proxy.index(row, self.logicalIndex).data().toString()
for row in xrange(self.proxy.rowCount())
)
...
for actionNumber, actionName in enumerate(sorted(valuesUnique)):
...
还有一点我想指出的其他事情。你正在保留一些永远不会被删除的临时对象。在同一个广告位中,您每次都会创建一个新的QMenu
和QSignalMapper
,但您永远不会清理旧的QMenu
和self
。随着时间的推移,你只是越来越多。
对于QSignalMapper
,只需将其设为局部变量,不要将其设为deleteLater
。这样它会在消失后被清理干净。对于# local variable, and no parent
menuValues = QtGui.QMenu()
# delete the previous one
try:
self.signalMapper.deleteLater()
except:
pass
self.signalMapper = QtCore.QSignalMapper(self)
,您可以在创建新的{{1}}之前使用{{1}}来电:
{{1}}