New user of QT

[navid]

graphics (now you name them widgets!) are in .ui file
you can simply create widgets and other objects, both in run time and using Qt Designer

work with examples and read helps

[JD2000]

Iif you double click your mainwindow.ui file you will see a visual representation of your gui.

If you right click the GraphicsView object you can select 'Goto slot' to begin programming the objects signals & slots.


Click on the GraphicsView and you can see its properties on the right hand side.

The object's name is probably graphicsView in this case

Back in mainwindow.cpp you can access / programme this objects methods and members:

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->graphicsView->setDragMode(QGraphicsView::ScrollHandDrag);
 
}

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

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->graphicsView->setDragMode(QGraphicsView::ScrollHandDrag);

}

To copy to clipboard, switch view to plain text mode