End list ListView (Pull Up to load more)

I have a Listview in which I would like to add more items when I am about to reach the end of the list. Currently I use onAtEndChanged signal to load more. But I would like to charge more when I'm about to reach about 80% of my list. I also use customized for my listview datamodel. The signal that will help me to get the row so that I can load more items specific row happened on my listview.

I tried to apply it to C++, but I couldn't. Any help on this

QVariant listitem::data(const QVariantList& indexPath)
{
    int index = indexPath[0].toInt();
    return _itemList.at(index);
}

Hmm... More like "infinite scroll" as feature you are looking for then pull upwards to refresh. This solution load messages when scrolling an element in the view which is 12 of the bottom of the list. You could do math according to the size of your list to do 80 percent. In any case, if you just want to load more items at the end of your list, once you have scrolls some amount of your list, you can do this:

//Connect a scroll state handler. BAM!
    ListScrollStateHandler::create(redditPostsList)
        .onFirstVisibleItemChanged(this, SLOT(onFirstVisibleItemChanged(QVariantList)));

then proceed as follows:

void App::onFirstVisibleItemChanged(QVariantList firstItem)
{
    int listIndex = this->m_RedditPostsModel->indexOf(this->m_RedditPostsModel->data(m_CurrentFirstVisibleListItem), 0);
    qDebug() << listIndex;
        //load more posts when we are 12 posts from the bottom of the list.
    int threshold = m_CountOfPostsRetrieved - 12;
    if(listIndex > threshold)
    {
        //simulate pressing the load more button.
        callAFunctionToLoadMoreItems();
    }
}

Sorry if there are errors in this code. This is the code that I use, but I've simplified a bit I only use infinite scrolling in some cases. This solution would still be using infinite scrolling.

Tags: BlackBerry Developers

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