how to get selected items of a QTableWidget from eventFilter?

Ripley

Hi everybody.

My next problem is when in qt implements a filter in a QTableWidget after this activated according every movement of the event, I dont know how to get selected items because is neccesary to after create the algorith to read copy (ctrl+c) and paste (ctrl+v) into the table. Please help me is a broken header.

The next code show me what it is the current index selected but the program crashs when open it.

bool StudyEventFilter::eventFilter(QObject *obj, QEvent *e) {
    //Q_UNUSED(obj)
    QTableWidget *table = obj->findChild<QTableWidget*>("deliverablesTableWidget");
    qDebug() << table->currentIndex();
    if(e->type() == QEvent::KeyPress){
        QKeyEvent * keyEvent = static_cast<QKeyEvent *>(e);
        if(keyEvent->matches(QKeySequence::Copy) ){
            qDebug() << "Copy";
            return true;

        }
        else if(keyEvent->matches(QKeySequence::Paste)){
            qDebug() << "Paste";
            return true;
        }
    }
    else {
            return false;
        }
}

The main target is to goal copy and paste into the same qtablewidget. Thanks a lot, waiting you understand me.

jsulm

@Ripley said in how to get selected items of a QTableWidget from eventFilter?:

the program crashs when open it

Well, you don't check whether table is a valid pointer. In general in such cases you should use the debugger to see where exactly it is crashing and what the values of involved variables are.

There is https://doc.qt.io/qt-5/qtablewidget.html#selectedItems - isn't that what you need?

Ripley

@jsulm Yes, I tried to debug and this return QWidget(0x0). And not get any idea how recover the data that was selected by the key or cursor.

QTableWidget *table = obj->findChild<QTableWidget*>("deliverablesTableWidget");
qDebug() << table;

Christian Ehrlicher

Why not simply derive from QTableView/Widget instead an eventHandler ? Why that complicated?

Ripley

@Christian-Ehrlicher because I am beginner I wish I look at for a solution or simple solution.

Ripley

Now i get the ctrl+c data with the next code:

QClipboard *clip;
clip = QApplication::clipboard();
if(keyEvent->matches(QKeySequence::Copy) ){
            QItemSelectionModel *table = obj->findChild<QItemSelectionModel*>("");
            QModelIndex index = table->currentIndex();
            clip->setText(index.data().toString());
            return true;

        }

And now I dont know how paste it the correspondent cells that i was selected.

        else if(keyEvent->matches(QKeySequence::Paste)){
            if(clip->mimeData()->hasText())
                foreach (QModelIndex item, obj->findChild<QItemSelectionModel*>("")->selectedIndexes()){
                    QStandardItemModel *sModel = new QStandardItemModel(this);
                    QStandardItem *model = sModel->itemFromIndex(item);
                    QModelIndex *l = dynamic_cast<QModelIndex*>(model);
                    model->setText(clip->text());
                    item.model()->itemData(*l);
                }
            return true;
        }

JonB

@Ripley said in how to get selected items of a QTableWidget from eventFilter?:

QStandardItemModel *sModel = new QStandardItemModel(this);

You don't want to create a new model. You want to use or find the model your QTableWidget is showing and put the value in there.