使用 currentIndexChanged 调用函数发出信号
Signal emitting with currentIndexChanged invoking function
拥有三个 classes。 Class Table QTableWidget 以及一个信号和一个通过单击事件获取行号的函数。传输并发送给另外两个 classes。这部分脚本很有前途。
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(0, 3)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
第二个 Combo class 带有 QComboBox 和一个信号以及两个向第三个 class 发送和传输信息的函数，QComboBox 中的值已更改。要检查信号是否发出，打印 Signal emitted 。这部分脚本似乎也工作正常，因为执行了打印代码。
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(Combo, self).__init__(parent)
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["1","2","3","4"])
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
value = self.combo[index]
self.dataupdate()
def dataupdate(self):
self.Toupdatedata.emit()
print('Signal emitted')
def get_data(self):
return tuple([self.combo.currentText()])
第三个 class Tab 带有 QTabWidget 和两个函数以及一个连接，第一个函数从第一个 class Table 接收行数，第二个函数应该并且应该运行 并在第二个 class Combo 的 combobox 的索引发生变化时执行。检查它是否可以打印字符串文本 I am executing。但它没有按预期工作？！当 QComboBox 的值改变时，函数 updatedata() 永远不会 运行s!
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = [Combo(), Combo()]
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rownumber.connect(self.rowselected_tables)
self.combo[self.Row].Toupdatedata.connect(self.updatedata)
# Alternative calling function currentrow.
# self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
self.Tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()
self.datacombo[row] = a1
@QtCore.pyqtSlot()
def updatedata(self):
self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
print('I am executing', self.datagroup)
我想知道，我做错了什么？
更新：
import sys
from PyQt5 import QtCore, QtWidgets, QtGui
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
rowCount = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(3, 3)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tableWidget)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
def getrow(self):
count = self.tableWidget.rowCount()
self.rowCount.emit(count)
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(Combo, self).__init__(parent)
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["1","2","3","4"])
self.hbox = QtWidgets.QHBoxLayout()
self.con = QtWidgets.QLabel("Number: ")
self.hbox.addWidget(self.con)
self.hbox.addWidget(self.combo)
self.setLayout(self.hbox)
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
self.dataupdate()
def dataupdate(self):
self.Toupdatedata.emit()
print('Signal emitted')
def get_data(self):
return tuple([self.combo.currentText()])
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = []
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rowCount.connect(self.addrow)
self.Table.getrow()
self.Table.rownumber.connect(self.rowselected_tables)
self.combo[self.Row].Toupdatedata.connect(self.updatedata)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tab)
# Alternative calling function currentrow.
# self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def addrow(self, count):
for row in range(count):
self.combo.append(Combo())
self.datacombo.append(Combo().get_data())
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
while self.tab.count() > 1:
self.tab.removeTab( self.tab.count()-1 )
self.tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()
self.datacombo[row] = a1
else:
for n in [1]:
self.tab.removeTab( n )
@QtCore.pyqtSlot()
def updatedata(self):
self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
print('I am executing', self.datagroup)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = Tab()
w.show()
sys.exit(app.exec_())
在我看来，您将信号 self.combo[self.Row].Toupdatedata.connect (self.updatedata) 连接到了错误的位置。
我注意到进行更改的文本。试一试：
import sys
from PyQt5 import QtCore, QtWidgets, QtGui
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
rowCount = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(3, 3)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tableWidget)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
def getrow(self):
count = self.tableWidget.rowCount()
self.rowCount.emit(count)
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal(int) # + int
def __init__(self, rowTable, parent=None): # + rowTable
super(Combo, self).__init__(parent)
self.rowTable = rowTable # +
#@ print(rowTable, '------')
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["item1", "item2", "item3", "item4"])
self.hbox = QtWidgets.QHBoxLayout()
self.con = QtWidgets.QLabel("Number: ")
self.hbox.addWidget(self.con)
self.hbox.addWidget(self.combo)
self.setLayout(self.hbox)
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
self.dataupdate()
def dataupdate(self):
print('+ Signal emitted ->', self.rowTable)
self.Toupdatedata.emit(self.rowTable) # + self.rowTable
def get_data(self):
return tuple([self.combo.currentText()])
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = []
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rowCount.connect(self.addrow)
self.Table.getrow()
self.Table.rownumber.connect(self.rowselected_tables)
#- self.combo[self.Row].Toupdatedata.connect(self.updatedata)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tab)
# Alternative calling function currentrow.
# ? self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def addrow(self, count):
for row in range(count):
cb = Combo(row) # + row
self.combo.append(cb)
self.datacombo.append(cb.get_data()[0]) # get_data()[0]
self.combo[row].Toupdatedata.connect(lambda rowTable=row: self.updatedata(rowTable)) # <===== !!!
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
while self.tab.count() > 1:
self.tab.removeTab( self.tab.count()-1 )
self.tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()[0] # + [0]
self.datacombo[row] = a1
else:
for n in [1]:
self.tab.removeTab( n )
@QtCore.pyqtSlot()
def updatedata(self, rowTable): # + rowTable
# self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
self.datacombo[rowTable] = self.combo[rowTable].get_data()[0] # [0]
print('I am executing', self.datacombo ) # ? self.datagroup
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = Tab()
w.show()
sys.exit(app.exec_())
拥有三个 classes。 Class Table QTableWidget 以及一个信号和一个通过单击事件获取行号的函数。传输并发送给另外两个 classes。这部分脚本很有前途。
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(0, 3)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
第二个 Combo class 带有 QComboBox 和一个信号以及两个向第三个 class 发送和传输信息的函数，QComboBox 中的值已更改。要检查信号是否发出，打印 Signal emitted 。这部分脚本似乎也工作正常，因为执行了打印代码。
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(Combo, self).__init__(parent)
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["1","2","3","4"])
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
value = self.combo[index]
self.dataupdate()
def dataupdate(self):
self.Toupdatedata.emit()
print('Signal emitted')
def get_data(self):
return tuple([self.combo.currentText()])
第三个 class Tab 带有 QTabWidget 和两个函数以及一个连接，第一个函数从第一个 class Table 接收行数，第二个函数应该并且应该运行 并在第二个 class Combo 的 combobox 的索引发生变化时执行。检查它是否可以打印字符串文本 I am executing。但它没有按预期工作？！当 QComboBox 的值改变时，函数 updatedata() 永远不会 运行s!
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = [Combo(), Combo()]
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rownumber.connect(self.rowselected_tables)
self.combo[self.Row].Toupdatedata.connect(self.updatedata)
# Alternative calling function currentrow.
# self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
self.Tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()
self.datacombo[row] = a1
@QtCore.pyqtSlot()
def updatedata(self):
self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
print('I am executing', self.datagroup)
我想知道，我做错了什么？
更新：
import sys
from PyQt5 import QtCore, QtWidgets, QtGui
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
rowCount = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(3, 3)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tableWidget)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
def getrow(self):
count = self.tableWidget.rowCount()
self.rowCount.emit(count)
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(Combo, self).__init__(parent)
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["1","2","3","4"])
self.hbox = QtWidgets.QHBoxLayout()
self.con = QtWidgets.QLabel("Number: ")
self.hbox.addWidget(self.con)
self.hbox.addWidget(self.combo)
self.setLayout(self.hbox)
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
self.dataupdate()
def dataupdate(self):
self.Toupdatedata.emit()
print('Signal emitted')
def get_data(self):
return tuple([self.combo.currentText()])
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = []
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rowCount.connect(self.addrow)
self.Table.getrow()
self.Table.rownumber.connect(self.rowselected_tables)
self.combo[self.Row].Toupdatedata.connect(self.updatedata)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tab)
# Alternative calling function currentrow.
# self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def addrow(self, count):
for row in range(count):
self.combo.append(Combo())
self.datacombo.append(Combo().get_data())
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
while self.tab.count() > 1:
self.tab.removeTab( self.tab.count()-1 )
self.tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()
self.datacombo[row] = a1
else:
for n in [1]:
self.tab.removeTab( n )
@QtCore.pyqtSlot()
def updatedata(self):
self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
print('I am executing', self.datagroup)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = Tab()
w.show()
sys.exit(app.exec_())
在我看来，您将信号 self.combo[self.Row].Toupdatedata.connect (self.updatedata) 连接到了错误的位置。
我注意到进行更改的文本。试一试：
import sys
from PyQt5 import QtCore, QtWidgets, QtGui
class Table(QtWidgets.QWidget):
rownumber = QtCore.pyqtSignal(int)
rowCount = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.tableWidget = QtWidgets.QTableWidget(3, 3)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tableWidget)
self.tableWidget.cellClicked.connect(self.cellClick)
def cellClick(self, row, column):
self.rownumber.emit(row)
def currentrow(self):
return self.tableWidget.currentRow()
def getrow(self):
count = self.tableWidget.rowCount()
self.rowCount.emit(count)
class Combo(QtWidgets.QWidget):
Toupdatedata = QtCore.pyqtSignal(int) # + int
def __init__(self, rowTable, parent=None): # + rowTable
super(Combo, self).__init__(parent)
self.rowTable = rowTable # +
#@ print(rowTable, '------')
self.combo = QtWidgets.QComboBox()
self.combo.addItems(["item1", "item2", "item3", "item4"])
self.hbox = QtWidgets.QHBoxLayout()
self.con = QtWidgets.QLabel("Number: ")
self.hbox.addWidget(self.con)
self.hbox.addWidget(self.combo)
self.setLayout(self.hbox)
self.combo.activated.connect(self.setdatastrength)
@QtCore.pyqtSlot(int)
def setdatastrength(self, index):
self.dataupdate()
def dataupdate(self):
print('+ Signal emitted ->', self.rowTable)
self.Toupdatedata.emit(self.rowTable) # + self.rowTable
def get_data(self):
return tuple([self.combo.currentText()])
class Tab(QtWidgets.QWidget):
def __init__(self, parent=None):
super( Tab, self).__init__()
self.tab = QtWidgets.QTabWidget()
self.Table = Table()
self.combo = []
self.datacombo = []
self.Row = 0
self.tab.addTab( self.Table, 'Tables')
self.Table.rowCount.connect(self.addrow)
self.Table.getrow()
self.Table.rownumber.connect(self.rowselected_tables)
#- self.combo[self.Row].Toupdatedata.connect(self.updatedata)
self.lay = QtWidgets.QHBoxLayout(self)
self.lay.addWidget(self.tab)
# Alternative calling function currentrow.
# ? self.combo[self.Table.currentrow()].Toupdatedata.connect(self.updatedata)
@QtCore.pyqtSlot(int)
def addrow(self, count):
for row in range(count):
cb = Combo(row) # + row
self.combo.append(cb)
self.datacombo.append(cb.get_data()[0]) # get_data()[0]
self.combo[row].Toupdatedata.connect(lambda rowTable=row: self.updatedata(rowTable)) # <===== !!!
@QtCore.pyqtSlot(int)
def rowselected_tables(self, row):
self.Row = row
if row > 0:
while self.tab.count() > 1:
self.tab.removeTab( self.tab.count()-1 )
self.tab.addTab(self.combo[row], 'Combo')
a1 = self.combo[row].get_data()[0] # + [0]
self.datacombo[row] = a1
else:
for n in [1]:
self.tab.removeTab( n )
@QtCore.pyqtSlot()
def updatedata(self, rowTable): # + rowTable
# self.datacombo[self.Table.currentrow()] = self.combo[self.Table.currentrow()].get_data()
self.datacombo[rowTable] = self.combo[rowTable].get_data()[0] # [0]
print('I am executing', self.datacombo ) # ? self.datagroup
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = Tab()
w.show()
sys.exit(app.exec_())