如何复制 - 将 QStandardItemModel 创建的 QTableView 中的多个项目粘贴到文本/excel 文件中？
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【中文标题】如何复制 - 将 QStandardItemModel 创建的 QTableView 中的多个项目粘贴到文本/excel 文件中？【英文标题】：How to Copy - Paste Multiple Items form QTableView created by QStandardItemModel to a text/excel file? 【发布时间】：2016-11-07 16:10:33 【问题描述】：如何将 QTableView 的多个项目/值复制并粘贴到文本/excel 文件中？
我的代码：
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
self.tableView.setSelectionMode(QAbstractItemView.ExtendedSelection 这一行有助于在 QTableView 中选择多个项目，但是当我执行 CTRL+C 并粘贴时，它只会粘贴最后一个项目或选择的值？
我已经看到self.tableView.setEditTriggers(QAbstractItemView.AllEditTriggers) 这条线，但这条线仅适用于表格中的单个项目，并忽略了扩展选择。
请帮助我这是我第二次发布这个问题。现在，我想知道这是否可能？请让我知道任何人！
【问题讨论】：
【参考方案1】：这里的困难在于表格中选定的单元格可能是不连续的，并且没有任何特定的顺序。因此，任务是计算包含所有选定单元格的最小矩形，然后从适合传递给 csv 写入器的数据结构中创建数据结构。
以下是执行此操作的演示脚本（基于此previous answer - 已添加注释）：
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_())
【讨论】：
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