QT notes - drag lines and movement of qtablewidget

Link last time QTableWidget And Specify a column

First, we need to allow dragging ：

// Drag and drop mode 
ui.tableWidget->setDragDropMode(QAbstractItemView::DragDrop);
// Can I drag 
ui.tableWidget->setDragEnabled(true);

Member functions ：

public:
	void moveRow(QTableWidget* table, int currentRow, int movetoRow);	// Specify a table   Move from a row to a row 

Slot function ：

private slots:
    void on_moveUpBtn_clicked();		// Move up one 
	void on_moveDownBtn_clicked();		// Move one down 
	void on_removeBtn_clicked();		// remove 
	void on_addBtn_clicked();			// increase 

void Test::moveRow(QTableWidget* table, int currentRow, int movetoRow)
{
    
	if (table == NULL)
		return;

	int rowCount = table->rowCount();
	int colCount = table->columnCount();
	// The moving distance exceeds the range of the table  
	if (movetoRow > rowCount || rowCount < 0 || movetoRow < 0 || currentRow < 0||colCount < 0)
		return;
	//********************  The first way  *******************************
	// Number of rows moved to  
	if (movetoRow < currentRow)       // rising 
	{
    
		// Add one line before the number of lines that need one to 
		table->insertRow(movetoRow);
		// Get the contents of the mobile line   And assign the original content to the newly added row 
		for (int i = 0; i < colCount; i++)
		{
    
			QString str = table->item(currentRow + 1, i)->text();
			QTableWidgetItem* item = new QTableWidgetItem;
			item->setText(str);
			table->setItem(movetoRow, i, item);
		}
		table->removeRow(currentRow + 1);
		table->selectRow(movetoRow);
	}
	else if (movetoRow > currentRow) // falling 
	{
    
		table->insertRow(movetoRow );
		// Get the contents of the mobile line   And assign the original content to the newly added row 
		for (int i = 0; i < colCount; i++)
		{
    				
			QString str = table->item(currentRow, i)->text();
			QTableWidgetItem* item = new QTableWidgetItem;
			item->setText(str);
			table->setItem(movetoRow, i, item);
		}

		table->removeRow(currentRow);
		table->selectRow(movetoRow - 1);
	}
	
	*********  The second way  **********************
	// rising 
	//if (movetoRow < currentRow)
	// currentRow++;
	 Insert row 
	//table->insertRow(movetoRow);
	//
	 Add content to this line 
	//for (int i = 0; i < colCount; i++)
	//{
    
	// table->setItem(movetoRow, i, table->takeItem(currentRow, i));
	//}
	 falling 
	//if (currentRow < movetoRow)
	// movetoRow--;

	// Remove the line that started moving 
	//table->removeRow(currentRow);
	// The number of selected rows is in the moving row 
	//table->selectRow(movetoRow);

}

void Test::on_moveUpBtn_clicked()
{
    
	qDebug() << QStringLiteral(" rising ");
	int row = ui.tableWidget->currentRow();
	moveRow(ui.tableWidget, row, row - 1);
}

void Test::on_moveDownBtn_clicked()
{
    
	qDebug() << QStringLiteral(" falling ");
	int row = ui.tableWidget->currentRow();
	moveRow(ui.tableWidget, row, row + 2);
}

void Test::on_removeBtn_clicked()
{
    
	int row = ui.tableWidget->currentRow();
	if (row < 0)
		return;
	ui.tableWidget->removeRow(row);
}

void Test::on_addBtn_clicked()
{
    
	int row = ui.tableWidget->currentRow();
	if (row < 0)
		return;
	ui.tableWidget->insertRow(row + 1);
}

ui chart ：

Reference blog ：
https://blog.csdn.net/weixin_42837024/article/details/82388077