How to get qlistwidget index and item text in one variable?

[Gokulnathvc]

I have two list widgets , one has file lists.. and other will show the selected list from first widget when >> button is pressed and it removes the moved item from first list. Now I would like to multi select the files and move it to the second list. Also, there index should be saved with text in a variable. When the selected item
is removed from second list when << button is pressed. It should place the items to the particular index where the files were originally present in first list before moving to second list..

[Santosh Reddy]

Storing the index is not a good idea and is discouraged to use. Instead hide() the selected items and show() them back and when required.

Edit: The API for hide/show item is setHidden()

[Gokulnathvc]

Could you explain my scenario with some codes?

[Santosh Reddy]

Look at this

class Worker : public QObject
{
    Q_OBJECT
public:
    Worker(QListWidget * left, QListWidget * right, QObject *parent)
        : QObject(parent)
        , leftList(left)
        , rightList(right){}
 
public slots:
    void addItems()
    {
        QList<QListWidgetItem*> items = leftList->selectedItems();
        for(int i = 0; i < items.count(); i++)
        {
            QListWidgetItem *item = items[i];
            item->setHidden(true);
            QList<QListWidgetItem*> rItems = rightList->findItems(item->text(), Qt::MatchExactly);
            for(int j = 0; j < rItems.count(); j++)
                rItems[j]->setHidden(false);
        }
    }
 
    void remItems()
    {
        QList<QListWidgetItem*> items = rightList->selectedItems();
        for(int i = 0; i < items.count(); i++)
        {
            QListWidgetItem *item = items[i];
            item->setHidden(true);
            QList<QListWidgetItem*> lItems = leftList->findItems(item->text(), Qt::MatchExactly);
            for(int j = 0; j < lItems.count(); j++)
                lItems[j]->setHidden(false);
        }
    }
 
private:
    QListWidget * leftList;
    QListWidget * rightList;
};
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
 
    QWidget w;
 
    QGridLayout * layout = new QGridLayout(&w);
 
    QListWidget * leftList  = new QListWidget(&w);
    QListWidget * rightList = new QListWidget(&w);
    QPushButton * addButton = new QPushButton(">>", &w);
    QPushButton * remButton = new QPushButton("<<", &w);
    Worker * worker = new Worker(leftList, rightList, &w);
 
    leftList->setSelectionMode(leftList->ExtendedSelection);
    rightList->setSelectionMode(leftList->ExtendedSelection);
 
    layout->addWidget(leftList,  0, 0, 4, 1);
    layout->addWidget(addButton, 1, 1, 1, 1);
    layout->addWidget(remButton, 2, 1, 1, 1);
    layout->addWidget(rightList, 0, 2, 4, 1);
 
    // Add Sample Items
    for(int i = 0; i < 15; i++)
    {
        const QString text = QString("Item - %1").arg(i);
        QListWidgetItem * lItem = new QListWidgetItem(text);
        QListWidgetItem * rItem = new QListWidgetItem(text);
        leftList->addItem(lItem);
        rightList->addItem(rItem);
        lItem->setHidden(false);
        rItem->setHidden(true);
    }
 
    worker->connect(addButton, SIGNAL(clicked()), SLOT(addItems()));
    worker->connect(remButton, SIGNAL(clicked()), SLOT(remItems()));
 
    w.setLayout(layout);
    w.show();
 
    return app.exec();
}
 
#include "Main.moc"

class Worker : public QObject
{
    Q_OBJECT
public:
    Worker(QListWidget * left, QListWidget * right, QObject *parent)
        : QObject(parent)
        , leftList(left)
        , rightList(right){}

public slots:
    void addItems()
    {
        QList<QListWidgetItem*> items = leftList->selectedItems();
        for(int i = 0; i < items.count(); i++)
        {
            QListWidgetItem *item = items[i];
            item->setHidden(true);
            QList<QListWidgetItem*> rItems = rightList->findItems(item->text(), Qt::MatchExactly);
            for(int j = 0; j < rItems.count(); j++)
                rItems[j]->setHidden(false);
        }
    }

    void remItems()
    {
        QList<QListWidgetItem*> items = rightList->selectedItems();
        for(int i = 0; i < items.count(); i++)
        {
            QListWidgetItem *item = items[i];
            item->setHidden(true);
            QList<QListWidgetItem*> lItems = leftList->findItems(item->text(), Qt::MatchExactly);
            for(int j = 0; j < lItems.count(); j++)
                lItems[j]->setHidden(false);
        }
    }

private:
    QListWidget * leftList;
    QListWidget * rightList;
};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QWidget w;

    QGridLayout * layout = new QGridLayout(&w);

    QListWidget * leftList  = new QListWidget(&w);
    QListWidget * rightList = new QListWidget(&w);
    QPushButton * addButton = new QPushButton(">>", &w);
    QPushButton * remButton = new QPushButton("<<", &w);
    Worker * worker = new Worker(leftList, rightList, &w);

    leftList->setSelectionMode(leftList->ExtendedSelection);
    rightList->setSelectionMode(leftList->ExtendedSelection);

    layout->addWidget(leftList,  0, 0, 4, 1);
    layout->addWidget(addButton, 1, 1, 1, 1);
    layout->addWidget(remButton, 2, 1, 1, 1);
    layout->addWidget(rightList, 0, 2, 4, 1);

    // Add Sample Items
    for(int i = 0; i < 15; i++)
    {
        const QString text = QString("Item - %1").arg(i);
        QListWidgetItem * lItem = new QListWidgetItem(text);
        QListWidgetItem * rItem = new QListWidgetItem(text);
        leftList->addItem(lItem);
        rightList->addItem(rItem);
        lItem->setHidden(false);
        rItem->setHidden(true);
    }

    worker->connect(addButton, SIGNAL(clicked()), SLOT(addItems()));
    worker->connect(remButton, SIGNAL(clicked()), SLOT(remItems()));

    w.setLayout(layout);
    w.show();

    return app.exec();
}

#include "Main.moc"

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[Gokulnathvc]

Thank you so much.. Got confused with the index values.. This works perfect..