QAbstractTableModel 中未发出 pyqt 信号
pyqt signal not emitted in QAbstractTableModel
所以我正在编写一个应用程序并使用 QTableView 和 QAbstractTableModel 来显示我的数据。在每一行中，第一列中都有一个复选框，当它被选中或未选中时，我想要一个 pyqtsignal CheckBoxValue 被发射到 MyTable。但是似乎没有调用MyTable中的连接函数self.checkboxchecked。虽然我以前用pyqtSignal几次都没有问题，但我卡在这里无法解决。
谢谢大家花时间解答我的问题！
import operator # used for sorting
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4 import QtGui, QtCore
class MyTable(QWidget):
Checkboxcheckvalue = pyqtSignal(bool)
Rowselected = pyqtSignal(int)
doubleClicked = pyqtSignal(int)
def __init__(self, *args):
QWidget.__init__(self, *args)
# setGeometry(x_pos, y_pos, width, height)
# self.setGeometry(70, 150, 1326, 582)
self.dataList = []
self.header = []
self.currentrow = []
self.setWindowTitle("Click on the header to sort table")
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view = QTableView()
#self.table_view.setSelectionMode(QAbstractItemView.SingleSelection)
self.table_view.setSelectionMode(QtGui.QAbstractItemView.SingleSelection)
self.table_view.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
# bind cell click to a method reference
self.table_view.clicked.connect(self.showSelection)
self.table_view.clicked.connect(self.selectRow)
self.table_view.doubleClicked.connect(self.doubleclickedaction)
self.table_model.CheckBoxValue.connect(self.checkboxchecked)
self.table_view.setModel(self.table_model)
# enable sorting
self.table_view.setSortingEnabled(True)
layout = QVBoxLayout(self)
layout.addWidget(self.table_view)
self.setLayout(layout)
def update_model(self):
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view.setModel(self.table_model)
self.table_view.update()
def findLabelName(self,rowindex):
return self.dataList[rowindex][-1]
def doubleclickedaction(self,index):
self.doubleClicked.emit(index.row())
self.currentrow = index.row()
print ('doubleclicked',self.findLabelName(index.row()))
def checkboxchecked(self,value):
print ('table checkboxchecked',self.currentrow,value)
# self.currentrow = index.row()
if value == True:
self.Checkboxcheckvalue.emit(True)
else:
self.Checkboxcheckvalue.emit(False)
def selectedLabel(self,index):
return self.findLabelName(index.row())
def showSelection(self, item):
cellContent = item.data()
# print(cellContent) # test
sf = "You clicked on {}".format(cellContent)
# display in title bar for convenience
self.setWindowTitle(sf)
def selectRow(self, index):
self.Rowselected.emit(index.row())
self.currentrow = index.row()
print("current row is %d", index.row())
pass
class MyTableModel(QAbstractTableModel):
"""
keep the method names
they are an integral part of the model
"""
CheckBoxValue = pyqtSignal(bool)
def __init__(self, parent, mylist, header, *args):
QAbstractTableModel.__init__(self, parent, *args)
self.mylist = mylist
self.header = header
def setDataList(self, mylist):
self.mylist = mylist
self.layoutAboutToBeChanged.emit()
self.dataChanged.emit(self.createIndex(0, 0), self.createIndex(self.rowCount(0), self.columnCount(0)))
self.layoutChanged.emit()
def rowCount(self, parent):
if self.mylist != []:
return len(self.mylist)
else:
return 0
def columnCount(self, parent):
if self.mylist != []:
return len(self.mylist[0])-1
else:
return 0
def data(self, index, role):
if not index.isValid():
return None
if (index.column() == 0):
value = self.mylist[index.row()][index.column()].text()
else:
value = self.mylist[index.row()][index.column()]
if role == QtCore.Qt.EditRole:
return value
elif role == QtCore.Qt.DisplayRole:
return value
elif role == QtCore.Qt.CheckStateRole:
if index.column() == 0:
if self.mylist[index.row()][index.column()].isChecked():
return QtCore.Qt.Checked
else:
return QtCore.Qt.Unchecked
def headerData(self, col, orientation, role):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return self.header[col]
return None
def sort(self, col, order):
"""sort table by given column number col"""
if col != 0:
pass
else:
col = -1
self.emit(SIGNAL("layoutAboutToBeChanged()"))
self.mylist = sorted(self.mylist, key=operator.itemgetter(col))
if order == Qt.DescendingOrder:
self.mylist.reverse()
self.emit(SIGNAL("layoutChanged()"))
print 'sorted'
def flags(self, index):
if not index.isValid():
return None
if index.column() == 0:
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsUserCheckable
else:
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def setData(self, index, value, role):
if not index.isValid():
return False
if role == QtCore.Qt.CheckStateRole and index.column() == 0:
if value == QtCore.Qt.Checked:
self.mylist[index.row()][index.column()].setChecked(True)
print('checked',index.row())
self.CheckBoxValue.emit(True)
else:
self.mylist[index.row()][index.column()].setChecked(False)
print('unchecked',index.row())
self.CheckBoxValue.emit(False)
self.dataChanged.emit(index, index)
return True
if __name__ == '__main__':
app = QApplication([])
header = ['name', 'type', 'segment', 'exit', 'entry']
dataList = [
[QtGui.QCheckBox('line9'), 'line', '058176', '01', '1705','line9'],
[QtGui.QCheckBox('line3'), 'line', '058176', '02', '1705','line3'],
[QtGui.QCheckBox('line6'), 'line', '058176', '03', '1705','line6'],
[QtGui.QCheckBox('line1'), 'line', '058176', '04', '1705','line'],
[QtGui.QCheckBox('line4'), 'line', '058176', '01', '1705','line4'],
[QtGui.QCheckBox('area4'), 'area', '058176', '02', '1705','area4'],
[QtGui.QCheckBox('area2'), 'area', '058176', '02', '1705','area2'],
[QtGui.QCheckBox('area8'), 'area', '058176', '01', '1705','area8'],
]
win = MyTable()
win.dataList = dataList
win.header = header
win.update_model()
win.show()
app.exec_()
在您的例子中，您已经在 MyTable 构造函数中创建了一个 table_model，并与该对象建立了连接，但稍后在您创建的 update_model 方法中一个新模型，因此先前的模型及其连接已被删除。
def update_model(self):
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view.setModel(self.table_model)
self.table_model.CheckBoxValue.connect(self.checkboxchecked)
self.table_view.update()
虽然我更喜欢更新模型，而不是为其创建新模型，但我会创建一个方法来更新数据：
class MyTableModel(QAbstractTableModel):
"""
keep the method names
they are an integral part of the model
"""
CheckBoxValue = pyqtSignal(bool)
def __init__(self, parent, mylist, header, *args):
QAbstractTableModel.__init__(self, parent, *args)
self.mylist = mylist
self.header = header
def update_model(self, mylist, header):
self.beginResetModel()
self.mylist = mylist
self.header = header
self.endResetModel()
[...]
并在 Table 的 update_model 中：
class MyTable(QWidget):
[...]
def update_model(self):
self.table_model.update_model(self.dataList, self.header)
所以我正在编写一个应用程序并使用 QTableView 和 QAbstractTableModel 来显示我的数据。在每一行中，第一列中都有一个复选框，当它被选中或未选中时，我想要一个 pyqtsignal CheckBoxValue 被发射到 MyTable。但是似乎没有调用MyTable中的连接函数self.checkboxchecked。虽然我以前用pyqtSignal几次都没有问题，但我卡在这里无法解决。
谢谢大家花时间解答我的问题！
import operator # used for sorting
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4 import QtGui, QtCore
class MyTable(QWidget):
Checkboxcheckvalue = pyqtSignal(bool)
Rowselected = pyqtSignal(int)
doubleClicked = pyqtSignal(int)
def __init__(self, *args):
QWidget.__init__(self, *args)
# setGeometry(x_pos, y_pos, width, height)
# self.setGeometry(70, 150, 1326, 582)
self.dataList = []
self.header = []
self.currentrow = []
self.setWindowTitle("Click on the header to sort table")
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view = QTableView()
#self.table_view.setSelectionMode(QAbstractItemView.SingleSelection)
self.table_view.setSelectionMode(QtGui.QAbstractItemView.SingleSelection)
self.table_view.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
# bind cell click to a method reference
self.table_view.clicked.connect(self.showSelection)
self.table_view.clicked.connect(self.selectRow)
self.table_view.doubleClicked.connect(self.doubleclickedaction)
self.table_model.CheckBoxValue.connect(self.checkboxchecked)
self.table_view.setModel(self.table_model)
# enable sorting
self.table_view.setSortingEnabled(True)
layout = QVBoxLayout(self)
layout.addWidget(self.table_view)
self.setLayout(layout)
def update_model(self):
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view.setModel(self.table_model)
self.table_view.update()
def findLabelName(self,rowindex):
return self.dataList[rowindex][-1]
def doubleclickedaction(self,index):
self.doubleClicked.emit(index.row())
self.currentrow = index.row()
print ('doubleclicked',self.findLabelName(index.row()))
def checkboxchecked(self,value):
print ('table checkboxchecked',self.currentrow,value)
# self.currentrow = index.row()
if value == True:
self.Checkboxcheckvalue.emit(True)
else:
self.Checkboxcheckvalue.emit(False)
def selectedLabel(self,index):
return self.findLabelName(index.row())
def showSelection(self, item):
cellContent = item.data()
# print(cellContent) # test
sf = "You clicked on {}".format(cellContent)
# display in title bar for convenience
self.setWindowTitle(sf)
def selectRow(self, index):
self.Rowselected.emit(index.row())
self.currentrow = index.row()
print("current row is %d", index.row())
pass
class MyTableModel(QAbstractTableModel):
"""
keep the method names
they are an integral part of the model
"""
CheckBoxValue = pyqtSignal(bool)
def __init__(self, parent, mylist, header, *args):
QAbstractTableModel.__init__(self, parent, *args)
self.mylist = mylist
self.header = header
def setDataList(self, mylist):
self.mylist = mylist
self.layoutAboutToBeChanged.emit()
self.dataChanged.emit(self.createIndex(0, 0), self.createIndex(self.rowCount(0), self.columnCount(0)))
self.layoutChanged.emit()
def rowCount(self, parent):
if self.mylist != []:
return len(self.mylist)
else:
return 0
def columnCount(self, parent):
if self.mylist != []:
return len(self.mylist[0])-1
else:
return 0
def data(self, index, role):
if not index.isValid():
return None
if (index.column() == 0):
value = self.mylist[index.row()][index.column()].text()
else:
value = self.mylist[index.row()][index.column()]
if role == QtCore.Qt.EditRole:
return value
elif role == QtCore.Qt.DisplayRole:
return value
elif role == QtCore.Qt.CheckStateRole:
if index.column() == 0:
if self.mylist[index.row()][index.column()].isChecked():
return QtCore.Qt.Checked
else:
return QtCore.Qt.Unchecked
def headerData(self, col, orientation, role):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return self.header[col]
return None
def sort(self, col, order):
"""sort table by given column number col"""
if col != 0:
pass
else:
col = -1
self.emit(SIGNAL("layoutAboutToBeChanged()"))
self.mylist = sorted(self.mylist, key=operator.itemgetter(col))
if order == Qt.DescendingOrder:
self.mylist.reverse()
self.emit(SIGNAL("layoutChanged()"))
print 'sorted'
def flags(self, index):
if not index.isValid():
return None
if index.column() == 0:
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsUserCheckable
else:
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def setData(self, index, value, role):
if not index.isValid():
return False
if role == QtCore.Qt.CheckStateRole and index.column() == 0:
if value == QtCore.Qt.Checked:
self.mylist[index.row()][index.column()].setChecked(True)
print('checked',index.row())
self.CheckBoxValue.emit(True)
else:
self.mylist[index.row()][index.column()].setChecked(False)
print('unchecked',index.row())
self.CheckBoxValue.emit(False)
self.dataChanged.emit(index, index)
return True
if __name__ == '__main__':
app = QApplication([])
header = ['name', 'type', 'segment', 'exit', 'entry']
dataList = [
[QtGui.QCheckBox('line9'), 'line', '058176', '01', '1705','line9'],
[QtGui.QCheckBox('line3'), 'line', '058176', '02', '1705','line3'],
[QtGui.QCheckBox('line6'), 'line', '058176', '03', '1705','line6'],
[QtGui.QCheckBox('line1'), 'line', '058176', '04', '1705','line'],
[QtGui.QCheckBox('line4'), 'line', '058176', '01', '1705','line4'],
[QtGui.QCheckBox('area4'), 'area', '058176', '02', '1705','area4'],
[QtGui.QCheckBox('area2'), 'area', '058176', '02', '1705','area2'],
[QtGui.QCheckBox('area8'), 'area', '058176', '01', '1705','area8'],
]
win = MyTable()
win.dataList = dataList
win.header = header
win.update_model()
win.show()
app.exec_()
在您的例子中，您已经在 MyTable 构造函数中创建了一个 table_model，并与该对象建立了连接，但稍后在您创建的 update_model 方法中一个新模型，因此先前的模型及其连接已被删除。
def update_model(self):
self.table_model = MyTableModel(self, self.dataList, self.header)
self.table_view.setModel(self.table_model)
self.table_model.CheckBoxValue.connect(self.checkboxchecked)
self.table_view.update()
虽然我更喜欢更新模型，而不是为其创建新模型，但我会创建一个方法来更新数据：
class MyTableModel(QAbstractTableModel):
"""
keep the method names
they are an integral part of the model
"""
CheckBoxValue = pyqtSignal(bool)
def __init__(self, parent, mylist, header, *args):
QAbstractTableModel.__init__(self, parent, *args)
self.mylist = mylist
self.header = header
def update_model(self, mylist, header):
self.beginResetModel()
self.mylist = mylist
self.header = header
self.endResetModel()
[...]
并在 Table 的 update_model 中：
class MyTable(QWidget):
[...]
def update_model(self):
self.table_model.update_model(self.dataList, self.header)