[英]PyQt5 Qtablewidget and connecting to buttons
我创建了一个Qtablewidget作为类,并使用add_button添加行,使用delete_button从表中向下删除行。 我想将功能连接到按钮,但是不能正常工作。 我已使用getattr方法调用该函数,但仍然无法正常工作。
桌子
为了进一步说明,这些脚本行给出了属性错误。 当它们由button.clicked.connect方法调用时。
add_button.clicked.connect(self._addrow)
delete_button.clicked.connect(self._removeItem)
脚本如下:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets, Qt
class loadtable(QtWidgets.QTableWidget):
def __init__(self, parent=None):
super(loadtable, self).__init__(parent)
self.setColumnCount(5)
self.setRowCount(1)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
headertitle = ("A","B","C","D","E")
self.setHorizontalHeaderLabels(headertitle)
self.verticalHeader().setVisible(False)
self.horizontalHeader().setHighlightSections(False)
self.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Fixed)
self.setSelectionMode(QtWidgets.QAbstractItemView.NoSelection)
self.setColumnWidth(0, 130)
combox_lay = QtWidgets.QComboBox(self)
combox_lay.addItems(["I","II"])
self.setCellWidget(0, 4, combox_lay)
self.cellChanged.connect(self._cellclicked)
#self.cellChanged.connect(self._addrow)
#self.cellDoubleClicked.connect(self._removerow)
def _cellclicked(self):
self.value = self.currentItem()
self.value.setTextAlignment(Qt.AlignCenter)
#if self.value is not None:
#return self.value.setTextAlignment(Qt.AlignCenter)
def _addrow(self):
rowcount = self.rowCount()
print(rowcount)
self.setRowCount(rowcount+1)
combox_add = QtWidgets.QComboBox(self)
combox_add.addItems(["I","II"])
self.setCellWidget(rowcount, 4, combox_add)
def _removerow(self):
self.removeRow(1)
class thirdtabloads(QtWidgets.QWidget):
def __init__(self, parent=None):
super(thirdtabloads, self).__init__(parent)
table = loadtable()
button_layout = QtWidgets.QVBoxLayout()
add_button = QtWidgets.QPushButton("Add")
add_button.clicked.connect(self._addrow)
delete_button = QtWidgets.QPushButton("Delete")
delete_button.clicked.connect(self._removeItem)
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
tablehbox = QtWidgets.QHBoxLayout()
tablehbox.setContentsMargins(10,10,10,10)
tablehbox.addWidget(table)
grid = QtWidgets.QGridLayout(self)
grid.addLayout(button_layout, 0, 1)
grid.addLayout(tablehbox, 0, 0)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = thirdtabloads()
w.show()
sys.exit(app.exec_())
要添加行,您必须使用insertRow()
来删除最后一行,使用removeRow()
并传递最后一行,并记住编号从0开始,所以最后一行是self.rowCount() - 1.
另一方面,您的连接不正确,我问您: 谁拥有_addrow()
和_removerow()
插槽? 属于LoadTable,因此要访问它们,我们需要该类的对象,即table._addrow
和table._removerow
。
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class LoadTable(QtWidgets.QTableWidget):
def __init__(self, parent=None):
super(LoadTable, self).__init__(1, 5, parent)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
headertitle = ("A","B","C","D","E")
self.setHorizontalHeaderLabels(headertitle)
self.verticalHeader().hide()
self.horizontalHeader().setHighlightSections(False)
self.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Fixed)
self.setSelectionMode(QtWidgets.QAbstractItemView.NoSelection)
self.setColumnWidth(0, 130)
combox_lay = QtWidgets.QComboBox(self)
combox_lay.addItems(["I","II"])
self.setCellWidget(0, 4, combox_lay)
self.cellChanged.connect(self._cellclicked)
@QtCore.pyqtSlot(int, int)
def _cellclicked(self, r, c):
it = self.item(r, c)
it.setTextAlignment(QtCore.Qt.AlignCenter)
@QtCore.pyqtSlot()
def _addrow(self):
rowcount = self.rowCount()
self.insertRow(rowcount)
combox_add = QtWidgets.QComboBox(self)
combox_add.addItems(["I","II"])
self.setCellWidget(rowcount, 4, combox_add)
@QtCore.pyqtSlot()
def _removerow(self):
if self.rowCount() > 0:
self.removeRow(self.rowCount()-1)
class ThirdTabLoads(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ThirdTabLoads, self).__init__(parent)
table = LoadTable()
add_button = QtWidgets.QPushButton("Add")
add_button.clicked.connect(table._addrow)
delete_button = QtWidgets.QPushButton("Delete")
delete_button.clicked.connect(table._removerow)
button_layout = QtWidgets.QVBoxLayout()
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
tablehbox = QtWidgets.QHBoxLayout()
tablehbox.setContentsMargins(10, 10, 10, 10)
tablehbox.addWidget(table)
grid = QtWidgets.QGridLayout(self)
grid.addLayout(button_layout, 0, 1)
grid.addLayout(tablehbox, 0, 0)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = ThirdTabLoads()
w.show()
sys.exit(app.exec_())
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