src_gui_itemviews_qabstractitemview.cpp

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void MyView::resizeEvent(QResizeEvent *event) {
    horizontalScrollBar()->setRange(0, realWidth - width());
    ...
}
 
setIndexWidget(index, new QLineEdit);
...
setIndexWidget(index, new QTextEdit);
 
QItemSelectionModel *m = view->selectionModel();
view->setModel(new model);
delete m;