Using QList<QGraphicsItem*>

I am using a developer defined QGraphicsScene pointer from the "dialog/mainwindow" class called wavesScene to return a QList of QGraphicsItem*'s using QGraphicsScene::items. Something seems to be wrong with my syntax, it says that the list "graphicsItemList" is never used/declared.
Here is my code, any ideas as to how I would properly implement this methodology


relevant code inside mainwindow/segyView.h

Code:

---

QGraphicsScene *wavesScene;
Constructor code *I think, may be called something different
SEGYView::SEGYView(QWidget *parent)
    :QMainWindow(parent),
    ui(new Ui::SEGYView)
{
    ui->setupUi(this);
    wavesScene = new QGraphicsScene(this);
    ui->PixmapView->setScene(wavesScene);
}

---

Code inside slider_value_changed() slot

Code:

---

QList<QGraphicsItem*> graphicsItemList(wavesScene->items());
    QGraphicsPixmapItem pixmapItem(graphicsItemList.at(0));
    QPixmap wavesPixmap = pixmapItem.pixmap();
    QPixmap wavesPixmapScaled = wavesPixmap.scaled((newSliderValue*INITIAL_WAVES_PIXMAP_X_SIZE), 1250);
    pixmapItem.setPixmap((wavesPixmapScaled));
    wavesScene->addItem(&pixmapItem);
relevant code inside actionOpen on triggered() slot
 wavesScene->addItem(pixmapGraphicsItem);
 ui->PixmapView->setScene(wavesScene);

---

Error is "graphicsItemList" was not declared in this scope QGraphicsPixmapItem* pixmapItem = graphicsItemList.at(0);
^

You need to show us your real code, not "relevant" lines you've copied and pasted from who knows where. Copy and paste the full methods where you are getting the errors. Code without context is useless for helping you solve the problem.