Examples with IItem com.mikepenz.fastadapter.IItem used on opensource projects

Example 6 with IItem

use of com.mikepenz.fastadapter.IItem in project FastAdapter by mikepenz.

the class SubItemUtil method getAllItems.

/**
     * internal function!
     *
     * Why countHeaders and subItems => because the subItemsOnly is an internal flag for the recursive call to optimise it!
     */
private static List<IItem> getAllItems(List<IItem> items, boolean countHeaders, boolean subItemsOnly, IPredicate predicate) {
    List<IItem> res = new ArrayList<>();
    if (items == null || items.size() == 0) {
        return res;
    }
    int temp;
    int itemCount = items.size();
    IItem item;
    List<IItem> subItems;
    for (int i = 0; i < itemCount; i++) {
        item = items.get(i);
        if (item instanceof IExpandable && ((IExpandable) item).getSubItems() != null) {
            subItems = ((IExpandable) item).getSubItems();
            if (predicate == null) {
                if (countHeaders) {
                    res.add(item);
                }
                if (subItems != null && subItems.size() > 0) {
                    res.addAll(subItems);
                }
                res.addAll(getAllItems(subItems, countHeaders, true, predicate));
            } else {
                if (countHeaders && predicate.apply(item)) {
                    res.add(item);
                }
                temp = subItems != null ? subItems.size() : 0;
                for (int j = 0; j < temp; j++) {
                    if (predicate.apply(subItems.get(j))) {
                        res.add(subItems.get(j));
                    }
                }
            }
        } else // sub items will be counted in above if statement!
        if (!subItemsOnly && getParent(item) == null) {
            if (predicate == null) {
                res.add(item);
            } else if (predicate.apply(item)) {
                res.add(item);
            }
        }
    }
    return res;
}

Example 7 with IItem

use of com.mikepenz.fastadapter.IItem in project FastAdapter by mikepenz.

the class SubItemUtil method delete.

/**
     * deletes all items in identifiersToDelete collection from the adapter respecting if there are sub items or not
     * subitems are removed from their parents sublists, main items are directly removed
     *
     * @param fastAdapter the adapter to remove the items from
     * @param identifiersToDelete ids of items to remove
     * @param notifyParent if true, headers of removed items will be notified about the change of their child items
     * @param deleteEmptyHeaders if true, empty headers will be removed from the adapter
     * @return List of items that have been removed from the adapter
     */
public static List<IItem> delete(final FastAdapter fastAdapter, Collection<Long> identifiersToDelete, boolean notifyParent, boolean deleteEmptyHeaders) {
    List<IItem> deleted = new ArrayList<>();
    if (identifiersToDelete == null || identifiersToDelete.size() == 0) {
        return deleted;
    }
    // we use a LinkedList, because this has performance advantages when modifying the listIterator during iteration!
    // Modifying list is O(1)
    LinkedList<Long> identifiers = new LinkedList<>(identifiersToDelete);
    // we delete item per item from the adapter directly or from the parent
    // if keepEmptyHeaders is false, we add empty headers to the selected items set via the iterator, so that they are processed in the loop as well
    IItem item, parent;
    int pos, parentPos;
    boolean expanded;
    Long identifier;
    ListIterator<Long> it = identifiers.listIterator();
    while (it.hasNext()) {
        identifier = it.next();
        pos = fastAdapter.getPosition(identifier);
        item = fastAdapter.getItem(pos);
        // search for parent - if we find one, we remove the item from the parent's subitems directly
        parent = getParent(item);
        if (parent != null) {
            parentPos = fastAdapter.getPosition(parent);
            boolean success = ((IExpandable) parent).getSubItems().remove(item);
            // check if parent is expanded and notify the adapter about the removed item, if necessary (only if parent is visible)
            if (parentPos != -1 && ((IExpandable) parent).isExpanded()) {
                fastAdapter.notifyAdapterSubItemsChanged(parentPos, ((IExpandable) parent).getSubItems().size() + 1);
            }
            // if desired, notify the parent about it's changed items (only if parent is visible!)
            if (parentPos != -1 && notifyParent) {
                expanded = ((IExpandable) parent).isExpanded();
                fastAdapter.notifyAdapterItemChanged(parentPos);
                // expand the item again if it was expanded before calling notifyAdapterItemChanged
                if (expanded) {
                    fastAdapter.expand(parentPos);
                }
            }
            deleted.add(item);
            if (deleteEmptyHeaders && ((IExpandable) parent).getSubItems().size() == 0) {
                it.add(parent.getIdentifier());
                it.previous();
            }
        } else if (pos != -1) {
            // if we did not find a parent, we remove the item from the adapter
            IAdapter adapter = fastAdapter.getAdapter(pos);
            boolean success = false;
            if (adapter instanceof IItemAdapter) {
                success = ((IItemAdapter) adapter).remove(pos) != null;
                if (success) {
                    fastAdapter.notifyAdapterItemRemoved(pos);
                }
            }
            boolean isHeader = item instanceof IExpandable && ((IExpandable) item).getSubItems() != null;
            //                Log.d("DELETE", "success=" + success + " | deletedId=" + item.getIdentifier() + "(" + (isHeader ? "EMPTY HEADER" : "ITEM WITHOUT HEADER") + ")");
            deleted.add(item);
        }
    }
    return deleted;
}

Example 8 with IItem

use of com.mikepenz.fastadapter.IItem in project FastAdapter by mikepenz.

the class SubItemUtil method notifyItemsChanged.

/**
     * notifies items (incl. sub items if they are currently extended)
     *
     * @param adapter the adapter
     * @param header the expandable header that should be checked (incl. sub items)
     * @param identifiers set of identifiers that should be notified
     * @param checkSubItems true, if sub items of headers items should be checked recursively
     * @param restoreExpandedState true, if expanded headers should stay expanded
     */
public static <Item extends IItem & IExpandable> void notifyItemsChanged(final FastAdapter adapter, Item header, Set<Long> identifiers, boolean checkSubItems, boolean restoreExpandedState) {
    int subItems = header.getSubItems().size();
    int position = adapter.getPosition(header);
    boolean expanded = header.isExpanded();
    // 1) check header itself
    if (identifiers.contains(header.getIdentifier())) {
        adapter.notifyAdapterItemChanged(position);
    }
    // 2) check sub items, recursively
    IItem item;
    if (header.isExpanded()) {
        for (int i = 0; i < subItems; i++) {
            item = (IItem) header.getSubItems().get(i);
            if (identifiers.contains(item.getIdentifier())) {
                //                    Log.d("NOTIFY", "Position=" + position + ", i=" + i);
                adapter.notifyAdapterItemChanged(position + i + 1);
            }
            if (checkSubItems && item instanceof IExpandable) {
                notifyItemsChanged(adapter, (Item) item, identifiers, true, restoreExpandedState);
            }
        }
    }
    if (restoreExpandedState && expanded) {
        adapter.expand(position);
    }
}

Example 9 with IItem

use of com.mikepenz.fastadapter.IItem in project FastAdapter by mikepenz.

the class FastAdapterDiffUtil method set.

public static <A extends ItemAdapter<Item>, Item extends IItem> A set(final A adapter, final List<Item> items, final DiffCallback<Item> callback, final boolean detectMoves) {
    if (adapter.isUseIdDistributor()) {
        IdDistributor.checkIds(items);
    }
    //first collapse all items
    adapter.getFastAdapter().collapse(false);
    //if we have a comparator then sort
    if (adapter.getComparator() != null) {
        Collections.sort(items, adapter.getComparator());
    }
    //map the types
    adapter.mapPossibleTypes(items);
    //remember the old items
    final List<Item> oldItems = adapter.getAdapterItems();
    DiffUtil.DiffResult result = DiffUtil.calculateDiff(new DiffUtil.Callback() {

        @Override
        public int getOldListSize() {
            return oldItems.size();
        }

        @Override
        public int getNewListSize() {
            return items.size();
        }

        @Override
        public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
            return callback.areItemsTheSame(oldItems.get(oldItemPosition), items.get(newItemPosition));
        }

        @Override
        public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
            return callback.areContentsTheSame(oldItems.get(oldItemPosition), items.get(newItemPosition));
        }

        @Nullable
        @Override
        public Object getChangePayload(int oldItemPosition, int newItemPosition) {
            Object result = callback.getChangePayload(oldItems.get(oldItemPosition), oldItemPosition, items.get(newItemPosition), newItemPosition);
            return result == null ? super.getChangePayload(oldItemPosition, newItemPosition) : result;
        }
    }, detectMoves);
    //make sure the new items list is not a reference of the already mItems list
    if (items != oldItems) {
        //remove all previous items
        if (!oldItems.isEmpty()) {
            oldItems.clear();
        }
        //add all new items to the list
        oldItems.addAll(items);
    }
    result.dispatchUpdatesTo(new ListUpdateCallback() {

        @Override
        public void onInserted(int position, int count) {
            adapter.getFastAdapter().notifyAdapterItemRangeInserted(adapter.getFastAdapter().getPreItemCountByOrder(adapter.getOrder()) + position, count);
        }

        @Override
        public void onRemoved(int position, int count) {
            adapter.getFastAdapter().notifyAdapterItemRangeRemoved(adapter.getFastAdapter().getPreItemCountByOrder(adapter.getOrder()) + position, count);
        }

        @Override
        public void onMoved(int fromPosition, int toPosition) {
            adapter.getFastAdapter().notifyAdapterItemMoved(adapter.getFastAdapter().getPreItemCountByOrder(adapter.getOrder()) + fromPosition, toPosition);
        }

        @Override
        public void onChanged(int position, int count, Object payload) {
            adapter.getFastAdapter().notifyAdapterItemRangeChanged(adapter.getFastAdapter().getPreItemCountByOrder(adapter.getOrder()) + position, count, payload);
        }
    });
    return adapter;
}

Example 10 with IItem

use of com.mikepenz.fastadapter.IItem in project FastAdapter by mikepenz.

the class StickyHeaderSampleActivity method onCreate.

@Override
protected void onCreate(Bundle savedInstanceState) {
    findViewById(android.R.id.content).setSystemUiVisibility(findViewById(android.R.id.content).getSystemUiVisibility() | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sample);
    // Handle Toolbar
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setTitle(R.string.sample_sticky_header);
    //style our ui
    new MaterializeBuilder().withActivity(this).build();
    //create our FastAdapter
    fastAdapter = new FastAdapter();
    fastAdapter.withSelectable(true);
    //create our adapters
    final StickyHeaderAdapter stickyHeaderAdapter = new StickyHeaderAdapter();
    final HeaderAdapter headerAdapter = new HeaderAdapter();
    final ItemAdapter itemAdapter = new ItemAdapter();
    //configure our fastAdapter
    //as we provide id's for the items we want the hasStableIds enabled to speed up things
    fastAdapter.setHasStableIds(true);
    //get our recyclerView and do basic setup
    RecyclerView rv = (RecyclerView) findViewById(R.id.rv);
    rv.setLayoutManager(new LinearLayoutManager(this));
    rv.setItemAnimator(new DefaultItemAnimator());
    rv.setAdapter(stickyHeaderAdapter.wrap(itemAdapter.wrap(headerAdapter.wrap(fastAdapter))));
    //this adds the Sticky Headers within our list
    final StickyRecyclerHeadersDecoration decoration = new StickyRecyclerHeadersDecoration(stickyHeaderAdapter);
    rv.addItemDecoration(decoration);
    //fill with some sample data
    headerAdapter.add(new SimpleItem().withName("Header").withIdentifier(1));
    List<IItem> items = new ArrayList<>();
    for (int i = 1; i <= 100; i++) {
        items.add(new SimpleItem().withName("Test " + i).withHeader(headers[i / 5]).withIdentifier(100 + i));
    }
    itemAdapter.add(items);
    //so the headers are aware of changes
    stickyHeaderAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {

        @Override
        public void onChanged() {
            decoration.invalidateHeaders();
        }
    });
    //restore selections (this has to be done after the items were added
    fastAdapter.withSavedInstanceState(savedInstanceState);
    //set the back arrow in the toolbar
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(false);
}