PyQt5 QTableWidget 单元格select，保存并复制
PyQt5 QTableWidget cell select, save and copy
我加一个copy_button。当用户输入单元格时，用户想要 select 一行，然后单击 copy_button 复制内容并在 selected 行下方添加具有相同内容的新行。下面的代码应该完成它根据用户需要添加新行的工作，期望它的内容不是复制？我尝试打印以查看问题。我将 Qtable 小部件项目添加到空列表，然后在 for 循环之前打印该列表，看到它添加了内容。应该的，但是 setItem 方法后的项目打印，returns 为空。它与 table 的序列化过程相同。我还想序列化整个 table 并将其粘贴回去。
列出 for 循环前后的打印。
我的代码：
import sys
from PyQt5 import QtCore, QtGui, QtWidgets, Qt
class loadtable(QtWidgets.QTableWidget):
def __init__(self, parent=None):
super(loadtable, self).__init__(1, 5,parent)
self.setColumnCount(5)
self.setRowCount(1)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
headertitle = ("A","B","C","D","E")
QtWidgets.QTableWidgetItem(headertitle[i]))
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)
def _cellclicked(self):
self.value = self.currentItem()
self.value.setTextAlignment(Qt.AlignCenter)
@QtCore.pyqtSlot()
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)
@QtCore.pyqtSlot()
def _removerow(self):
if self.rowCount() > 0:
self.removeRow(self.rowCount()-1)
@QtCore.pyqtSlot()
def _cellselected(self):
r = self.currentRow()
c = self.columnCount()
cell = []
for i in range(c):
if i == c-1:
it = self.cellWidget(r , i)
else:
it = self.item(r , i)
cell.append(it)
self.setcopy(cell,r,c)
def setcopy(self,cell,r,c):
self.insertRow(r+1)
print(cell)
for j in range(c):
if j < c-1:
it = self.setItem(r+1, j,cell[j])
else:
it = self.setCellWidget(r+1, j, cell[j])
print(it)
return it
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(table._addrow)
delete_button = QtWidgets.QPushButton("Delete")
delete_button.clicked.connect(table._removerow)
copy_button = QtWidgets.QPushButton("Copy")
copy_button.clicked.connect(table._cellselected)
button_layout = QtWidgets.QVBoxLayout()
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
button_layout.addWidget(copy_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_())
首先，setItem()方法没有return任何东西，因为它是setter，所以如果你想找到如果项目存在，则必须使用 item() 方法，即 getter.
关于这个问题，您注意到您必须复制 2 个元素：QTableWidgetItem 和您使用 setCellWidget() 设置的小部件。如果你想复制 QTableWidgetItem ，你必须使用它的 clone() 方法，而对于小部件，没有方法可以做到这一点，所以你必须创建一个方法来复制必要的，在我的解决方案我展示了如何从 QComboBox 复制项目，如果您有其他小部件，则必须实现更多代码。最后总是检查，例如 currentRow 可以在没有选择任何东西时为 -1。
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
# copy qwidgets
def copy_widget(w):
if isinstance(w, QtWidgets.QWidget):
new_w = type(w)()
if isinstance(w, QtWidgets.QComboBox):
vals = [w.itemText(ix) for ix in range(w.count())]
new_w.addItems(vals)
# if instance(w, QtWidgets.AnotherWidget):
# copy values
return new_w
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)
@QtCore.pyqtSlot()
def _copyrow(self):
r = self.currentRow()
if 0 <= r < self.rowCount():
cells = {"items": [], "widgets": []}
for i in range(self.columnCount()):
it = self.item(r, i)
if it:
cells["items"].append((i, it.clone()))
w = self.cellWidget(r, i)
if w:
cells["widgets"].append((i, copy_widget(w)))
self.copy(cells, r+1)
def copy(self, cells, r):
self.insertRow(r)
for i, it in cells["items"]:
self.setItem(r, i, it)
for i, w in cells["widgets"]:
self.setCellWidget(r, i, w)
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)
copy_button = QtWidgets.QPushButton("Copy")
copy_button.clicked.connect(table._copyrow)
button_layout = QtWidgets.QVBoxLayout()
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
button_layout.addWidget(copy_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_())
setItem 方法后的项目打印，returns 为空。它与 table 的序列化过程相同。我还想序列化整个 table 并将其粘贴回去。
列出 for 循环前后的打印。
我的代码：
import sys
from PyQt5 import QtCore, QtGui, QtWidgets, Qt
class loadtable(QtWidgets.QTableWidget):
def __init__(self, parent=None):
super(loadtable, self).__init__(1, 5,parent)
self.setColumnCount(5)
self.setRowCount(1)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
headertitle = ("A","B","C","D","E")
QtWidgets.QTableWidgetItem(headertitle[i]))
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)
def _cellclicked(self):
self.value = self.currentItem()
self.value.setTextAlignment(Qt.AlignCenter)
@QtCore.pyqtSlot()
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)
@QtCore.pyqtSlot()
def _removerow(self):
if self.rowCount() > 0:
self.removeRow(self.rowCount()-1)
@QtCore.pyqtSlot()
def _cellselected(self):
r = self.currentRow()
c = self.columnCount()
cell = []
for i in range(c):
if i == c-1:
it = self.cellWidget(r , i)
else:
it = self.item(r , i)
cell.append(it)
self.setcopy(cell,r,c)
def setcopy(self,cell,r,c):
self.insertRow(r+1)
print(cell)
for j in range(c):
if j < c-1:
it = self.setItem(r+1, j,cell[j])
else:
it = self.setCellWidget(r+1, j, cell[j])
print(it)
return it
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(table._addrow)
delete_button = QtWidgets.QPushButton("Delete")
delete_button.clicked.connect(table._removerow)
copy_button = QtWidgets.QPushButton("Copy")
copy_button.clicked.connect(table._cellselected)
button_layout = QtWidgets.QVBoxLayout()
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
button_layout.addWidget(copy_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_())
首先，setItem()方法没有return任何东西，因为它是setter，所以如果你想找到如果项目存在，则必须使用 item() 方法，即 getter.
关于这个问题，您注意到您必须复制 2 个元素：QTableWidgetItem 和您使用 setCellWidget() 设置的小部件。如果你想复制 QTableWidgetItem ，你必须使用它的 clone() 方法，而对于小部件，没有方法可以做到这一点，所以你必须创建一个方法来复制必要的，在我的解决方案我展示了如何从 QComboBox 复制项目，如果您有其他小部件，则必须实现更多代码。最后总是检查，例如 currentRow 可以在没有选择任何东西时为 -1。
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
# copy qwidgets
def copy_widget(w):
if isinstance(w, QtWidgets.QWidget):
new_w = type(w)()
if isinstance(w, QtWidgets.QComboBox):
vals = [w.itemText(ix) for ix in range(w.count())]
new_w.addItems(vals)
# if instance(w, QtWidgets.AnotherWidget):
# copy values
return new_w
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)
@QtCore.pyqtSlot()
def _copyrow(self):
r = self.currentRow()
if 0 <= r < self.rowCount():
cells = {"items": [], "widgets": []}
for i in range(self.columnCount()):
it = self.item(r, i)
if it:
cells["items"].append((i, it.clone()))
w = self.cellWidget(r, i)
if w:
cells["widgets"].append((i, copy_widget(w)))
self.copy(cells, r+1)
def copy(self, cells, r):
self.insertRow(r)
for i, it in cells["items"]:
self.setItem(r, i, it)
for i, w in cells["widgets"]:
self.setCellWidget(r, i, w)
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)
copy_button = QtWidgets.QPushButton("Copy")
copy_button.clicked.connect(table._copyrow)
button_layout = QtWidgets.QVBoxLayout()
button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
button_layout.addWidget(copy_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_())