import sys

from PyQt5.QtCore import QEvent, Qt
from PyQt5.QtWidgets import QApplication, QTableWidget


class CopyPastableCrudQTableWidget(QTableWidget):
    crud = None

    def eventFilter(self, target, event):
        if event.type() == QEvent.KeyPress:
            if event.key() == Qt.Key_C and (event.modifiers() & Qt.ControlModifier):
                if event.key() == Qt.Key_C and (event.modifiers() & Qt.ControlModifier):
                    copied_cells = sorted(self.selectedIndexes())
                    min_row, max_row, min_col, max_col = sys.maxsize, 0, sys.maxsize, 0
                    for cell in copied_cells:
                        row = cell.row()
                        min_row, max_row = min(row, min_row), max(row, max_row)
                        col = cell.column()
                        min_col, max_col = min(col, min_col), max(col, max_col)
                    if min_row == 0:  # if filters row
                        return False
                    copy_sparse = {}
                    for cell in copied_cells:
                        row = cell.row()
                        col = cell.column()
                        if row not in copy_sparse:
                            copy_sparse[row] = {}
                        cell = self.cellWidget(row, col)
                        if cell is not None:
                            copy_sparse[row][col] = cell.parse(row_number=row, crud=self.crud)
                    copy_dense = [["" for col in range(max_col - min_col + 1)] for row in range(max_row - min_row + 1)]
                    for row, row_cells in copy_sparse.items():
                        for col, cell_text in row_cells.items():
                            if cell_text is not None:
                                copy_dense[row - min_row][col - min_col] = str(cell_text)
                    copy_text = "\n".join(["\t".join(row) for row in copy_dense])
                    QApplication.clipboard().setText(copy_text)
                super().keyPressEvent(event)
                QApplication.sendEvent(self, event)
                return True
            elif event.key() == Qt.Key_V and (event.modifiers() & Qt.ControlModifier):
                min_row = self.currentRow()
                min_col = self.currentColumn()
                if min_row == 0:  # if filters row
                    return False
                copy_text = QApplication.clipboard().text()
                copy_dense = [row.split("\t") for row in copy_text.split("\n")]
                if len(copy_dense) > 1 and len(copy_dense[-1]) == 1 and not len(copy_dense[-1][-1]):
                    copy_dense.pop(-1)
                for row, row_cells in enumerate(copy_dense):
                    for col, cell_text in enumerate(row_cells):
                        r = min_row + row
                        c = min_col + col
                        cell = self.cellWidget(r, c)
                        if cell is not None:
                            cell.render(cell_text, field_name=self.crud.select[c] if self.crud is not None else None, row_number=r, crud=self.crud)
                super().keyPressEvent(event)
                QApplication.sendEvent(self, event)
                return True
        return super().eventFilter(target, event)

    def setCellWidget(self, row, column, widget):
        widget.installEventFilter(self)
        super().setCellWidget(row, column, widget)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    table = CopyPastableCrudQTableWidget()
    table.setRowCount(10)
    table.setColumnCount(10)
    table.show()
    sys.exit(app.exec())