qt - Printing QGraphicsScene cuts objects in half -

i want print what's on qgraphicsscene:

void mainwindow::on_print_clicked() {     if (template_ptr != q_nullptr) {         qprinter printer(qprinter::highresolution);         if (qprintdialog(&printer, this).exec() == qdialog::accepted) {             if (qpagesetupdialog(&printer, this).exec() == qdialog::accepted) {                 qpainter painter(&printer);                 painter.setrenderhint(qpainter::antialiasing);                 painter.setrenderhint(qpainter::textantialiasing);                 qreal x, _y, h, w, fake;                 ui->graphicsview->scenerect().getrect(&x, &_y, &w, &fake);                 h = template_ptr->page_height*2.0;                 qint32 page = 0;                 while (true) {                     qreal y = _y + h*page;                     qrectf leftrect(x, y, w, template_ptr->page_height*2.0*template_ptr->max_pages - h*page);                     if (ui->graphicsview->scene()->items(leftrect).length() <= 0) {                         break;                     }                     qrectf sourcerect(x, y, w, h);                     ui->graphicsview->scene()->render(&painter, printer.pagerect(), sourcerect);                     printer.newpage();                     page++;                 }             }         }     } } 

that's effect (pdf file):

every point on lists single qgraphicsitem , don't know what's easiest way move items doesn't fit within page, next page... error-prone mathematics achieve i'm pretty sure can resolved in elegant way.

what do...

step 1: first create copy of scene (a new qgraphicsscene same size original) , move items there.

step 2: create temporary scene each new page, scenerect equal section wish print.

step 3: move items scene copy, contained in scenerect of temp scene.

step 4: after printing, move printed items original scene...

step 5: shorten copy scene bounding rect bounding rect of items still left inside it. (to allow step 4 place items in place, change x/y coordinates change w/h)

repeat steps 3 5 till copy scene empty.