如何复制 - 将 QStandardItemModel 创建的 QTableView 的多个项目粘贴到文本/excel 文件? [英] How to Copy - Paste Multiple Items form QTableView created by QStandardItemModel to a text/excel file?

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?

How can I copy and paste multiple items/values of a QTableView to a text/ excel file?

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

这一行 self.tableView.setSelectionMode(QAbstractItemView.ExtendedSelection 有助于在 QTableView 中选择多个项目，但是当我执行 CTRL+C 和粘贴它只粘贴选择的最后一个项目或值?

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?

我已经看到了 self.tableView.setEditTriggers(QAbstractItemView.AllEditTriggers) 行，但这一条只适用于表中的单个项目，而忽略了扩展选择.

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.

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！

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!

推荐答案

这里的难点在于表格中选定的单元格可能不连续且没有任何特定顺序.因此，任务是计算将包含所有选定单元格的最小矩形，然后根据该矩形创建适合传递给 csv 编写器的数据结构.

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.

以下是执行此操作的演示脚本(基于此以前的答案 - 添加的内容已被评论):

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_())

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