send Qtable widget selected items to list widget upon button click

Kushan

In my qt c++ application I have a Qtablewidget which contains 5 items( numbers from 1 to 5), a push button(named transfer) and a list widget.

following is my code

MainWindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
   
    void on_Transfer_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

MainWindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->tableWidget->setRowCount(5);
    ui->tableWidget->setColumnCount(1);
    for(int i=0;i<5;i++){
        ui->tableWidget->setItem(i, 0, new QTableWidgetItem((QString::number(i))));
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}



void MainWindow::on_Transfer_clicked()
{

}

when I select an item from tablewidget and click the button I want to add it to the list widget! How can I do this?

jsulm

@Kushan You can use http://doc.qt.io/qt-5/qtablewidget.html#selectedItems to get selected items from the table and then use http://doc.qt.io/qt-5/qlistwidget.html#insertItem-1 to add to the list widget...

Kushan

@jsulm Thanx !

I did

void MainWindow::on_Transfer_clicked()
{
ui->listWidget->addItem(ui->tableWidget->selectedItems());

}

and I get the following error!

'QListWidget::addItem(QList<QTableWidgetItem*>)'
ui->listWidget->addItem(ui->tableWidget->selectedItems());
^

jsulm

@Kushan Well, it can't work this way. Please take time to read the links I posted. selectedItems returns QList<QTableWidgetItem *> and addItem() takes either a string or QStringList and an index.

Kushan

@jsulm yeah but htere are no examples in your links

jsulm

@Kushan Why do you need examples? Call selectedItems and check whether the list it returns is empty - if it is empty you don't have anything to do. If it is not empty then iterate over the list and call http://doc.qt.io/qt-5/qtablewidgetitem.html#text on each element and put the result in a QString list then simply call insertItem and pass this list (untested):

void MainWindow::on_Transfer_clicked()
{
    QList<QTableWidgetItem *> selectedItems = ui->tableWidget->selectedItems();
    if (selectedItems.isEmpty())
        return;
    QStringList itemsToAdd;
    for (auto item : selectedItems)
        itemsToAdd.append(item->text());
    ui->listWidget->addItem(0, itemsToAdd);
}

Kushan

@jsulm Thanx but your one is erronous! I got it corrrected
void MainWindow::on_Transfer_clicked()
{
QList<QTableWidgetItem *> selectedItems = ui->tableWidget->selectedItems();
if (selectedItems.isEmpty()){
return;
}

  for (int i=0;i<selectedItems.size();i++){

  ui->listWidget->addItem(selectedItems[i]->text());

}
}

VRonin

For future reference, this approach only works if you know in advance all the roles you will use.
You can use KSelectionProxyModel instead if you need a proper general implementation