问题
How can I copy and paste multiple items/values of a QTableView to a text/ excel file?
My Code:
tab_table_view = QtGui.QWidget()
self.Tab.insertTab(0, tab_table_view, self.File_Name)
self.tableView = QtGui.QTableView(tab_table_view)
self.tableView.setGeometry(QtCore.QRect(0, 0, 721, 571))
self.model = QtGui.QStandardItemModel(self)
self.tableView.setSelectionMode(QAbstractItemView.ExtendedSelection
This line self.tableView.setSelectionMode(QAbstractItemView.ExtendedSelection helps with selecting multiple items in QTableView but when I do CTRL+C and paste it only pastes the last item or value of the selection?
I have seen the line self.tableView.setEditTriggers(QAbstractItemView.AllEditTriggers) but this one only applies to a single item in the table and ignores the extended selection.
Please help me this is the second time I am posting this question. Now, I am wondering if it is even possible? Please let me know Anyone!
回答1:
The difficulty here is that the selected cells in the table may be non-contiguous and not in any particular order. So the task is to calculate the smallest rectangle that will include all the selected cells, and then create a data structure from that which is suitable for passing to a csv writer.
Below is a demo script that does this (based on this previous answer - the additions have been commented):
PyQt4:
# add imports
import sys, csv, io
import pandas as pd, numpy as np
from PyQt4 import QtCore, QtGui
class Window(QtGui.QWidget):
def __init__(self):
super(Window, self).__init__()
self.model = QtGui.QStandardItemModel(self)
self.model.setSortRole(QtCore.Qt.UserRole)
self.tableView = QtGui.QTableView()
self.tableView.setSortingEnabled(True)
self.tableView.setModel(self.model)
# install event filter
self.tableView.installEventFilter(self)
self.button = QtGui.QPushButton('Open CSV', self)
self.button.clicked.connect(self.handleButton)
layout = QtGui.QVBoxLayout(self)
layout.addWidget(self.tableView)
layout.addWidget(self.button)
# add event filter
def eventFilter(self, source, event):
if (event.type() == QtCore.QEvent.KeyPress and
event.matches(QtGui.QKeySequence.Copy)):
self.copySelection()
return True
return super(Window, self).eventFilter(source, event)
# add copy method
def copySelection(self):
selection = self.tableView.selectedIndexes()
if selection:
rows = sorted(index.row() for index in selection)
columns = sorted(index.column() for index in selection)
rowcount = rows[-1] - rows[0] + 1
colcount = columns[-1] - columns[0] + 1
table = [[''] * colcount for _ in range(rowcount)]
for index in selection:
row = index.row() - rows[0]
column = index.column() - columns[0]
table[row][column] = index.data()
stream = io.StringIO()
csv.writer(stream).writerows(table)
QtGui.qApp.clipboard().setText(stream.getvalue())
def handleButton(self):
filters = (
'CSV files (*.csv *.txt)',
'Excel Files (*.xls *.xml *.xlsx *.xlsm)',
)
path, filter = QtGui.QFileDialog.getOpenFileNameAndFilter(
self, 'Open File', '', ';;'.join(filters))
if path:
csv = filter.startswith('CSV')
if csv:
dataframe = pd.read_csv(path)
else:
dataframe = pd.read_excel(path)
self.model.setRowCount(0)
dateformat = '%m/%d/%Y'
rows, columns = dataframe.shape
for row in range(rows):
items = []
for column in range(columns):
field = dataframe.iat[row, column]
if csv and isinstance(field, str):
try:
field = pd.to_datetime(field, format=dateformat)
except ValueError:
pass
if isinstance(field, pd.tslib.Timestamp):
text = field.strftime(dateformat)
data = field.timestamp()
else:
text = str(field)
if isinstance(field, np.number):
data = field.item()
else:
data = text
item = QtGui.QStandardItem(text)
item.setData(data, QtCore.Qt.UserRole)
items.append(item)
self.model.appendRow(items)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
window = Window()
window.setGeometry(500, 150, 600, 400)
window.show()
sys.exit(app.exec_())
PyQt5:
# add imports
import sys, csv, io
import pandas as pd, numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets
class Window(QtWidgets.QWidget):
def __init__(self):
super(Window, self).__init__()
self.model = QtGui.QStandardItemModel(self)
self.model.setSortRole(QtCore.Qt.UserRole)
self.tableView = QtWidgets.QTableView()
self.tableView.setSortingEnabled(True)
self.tableView.setModel(self.model)
# install event filter
self.tableView.installEventFilter(self)
self.button = QtWidgets.QPushButton('Open CSV', self)
self.button.clicked.connect(self.handleButton)
layout = QtWidgets.QVBoxLayout(self)
layout.addWidget(self.tableView)
layout.addWidget(self.button)
# add event filter
def eventFilter(self, source, event):
if (event.type() == QtCore.QEvent.KeyPress and
event.matches(QtGui.QKeySequence.Copy)):
self.copySelection()
return True
return super(Window, self).eventFilter(source, event)
# add copy method
def copySelection(self):
selection = self.tableView.selectedIndexes()
if selection:
rows = sorted(index.row() for index in selection)
columns = sorted(index.column() for index in selection)
rowcount = rows[-1] - rows[0] + 1
colcount = columns[-1] - columns[0] + 1
table = [[''] * colcount for _ in range(rowcount)]
for index in selection:
row = index.row() - rows[0]
column = index.column() - columns[0]
table[row][column] = index.data()
stream = io.StringIO()
csv.writer(stream).writerows(table)
QtWidgets.qApp.clipboard().setText(stream.getvalue())
def handleButton(self):
filters = (
'CSV files (*.csv *.txt)',
'Excel Files (*.xls *.xml *.xlsx *.xlsm)',
)
path, filter = QtWidgets.QFileDialog.getOpenFileName(
self, 'Open File', '', ';;'.join(filters))
if path:
csv = filter.startswith('CSV')
if csv:
dataframe = pd.read_csv(path)
else:
dataframe = pd.read_excel(path)
self.model.setRowCount(0)
dateformat = '%m/%d/%Y'
rows, columns = dataframe.shape
for row in range(rows):
items = []
for column in range(columns):
field = dataframe.iat[row, column]
if csv and isinstance(field, str):
try:
field = pd.to_datetime(field, format=dateformat)
except ValueError:
pass
if isinstance(field, pd.Timestamp):
text = field.strftime(dateformat)
data = field.timestamp()
else:
text = str(field)
if isinstance(field, np.number):
data = field.item()
else:
data = text
item = QtGui.QStandardItem(text)
item.setData(data, QtCore.Qt.UserRole)
items.append(item)
self.model.appendRow(items)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
window = Window()
window.setGeometry(500, 150, 600, 400)
window.show()
sys.exit(app.exec_())
来源：https://stackoverflow.com/questions/40469607/how-to-copy-paste-multiple-items-form-qtableview-created-by-qstandarditemmodel