C++ (Cpp) QListBox::itemRect示例

void ListBoxDnd::updateLine( const QPoint & dragPos )
{
    QListBox * src = (QListBox *) this->src;
    QListBoxItem *item = itemAt( dragPos );

    int ypos = item ? 
	( src->itemRect( item ).bottom() - ( line->height() / 2 ) ) : 
	( src->itemRect( ((QListBox *)src)->firstItem() ).top() );

    line->resize( src->viewport()->width(), line->height() );
    line->move( 0, ypos );
}

示例#2

显示文件

文件： listboxdnd.cpp 项目： app/ananas-labs

QListBoxItem * ListBoxDnd::itemAt( QPoint pos )
{
    QListBox * src = (QListBox *) this->src;
    QListBoxItem * result = src->itemAt( pos );
    QListBoxItem * last = src->item( src->count() - 1 );
    int i = src->index( result );

    if ( result && ( pos.y() < (src->itemRect(result).top() + src->itemHeight(i)/2) ) )
	result = result->prev();
    else if ( !result && pos.y() > src->itemRect( last ).bottom() )
	result = last;

    return result;
}