SwipeDismissAdapter.java

/*
 * Copyright 2013 Niek Haarman
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package external.ListviewAnimations.itemmanipulation;

import external.ListviewAnimations.ArrayAdapter;
import external.ListviewAnimations.BaseAdapterDecorator;
import android.widget.AbsListView;
import android.widget.BaseAdapter;

/**
 * Adds an option to swipe items in a ListView away. This does nothing more than
 * setting a new SwipeDismissListViewTouchListener to the ListView.
 */
public class SwipeDismissAdapter extends BaseAdapterDecorator {

    protected OnDismissCallback mCallback;
    protected SwipeDismissListViewTouchListener mSwipeDismissListViewTouchListener;

    protected SwipeOnScrollListener mOnScroll;

    public SwipeDismissAdapter(BaseAdapter baseAdapter,
            OnDismissCallback callback) {
        // add a default OnScrollListener
        this(baseAdapter, callback, new SwipeOnScrollListener());
    }

    public SwipeDismissAdapter(BaseAdapter baseAdapter,
            OnDismissCallback callback, SwipeOnScrollListener onScroll) {
        super(baseAdapter);
        mCallback = callback;
        mOnScroll = onScroll;
    }

    /**
     * Override-able
     * 
     * @param listView
     * @return SwipeDismissListViewTouchListener
     */
    protected SwipeDismissListViewTouchListener createListViewTouchListener(
            AbsListView listView) {
        return new SwipeDismissListViewTouchListener(listView, mCallback,
                mOnScroll);
    }

    @Override
    public void setAbsListView(AbsListView listView) {
        super.setAbsListView(listView);
        if (mDecoratedBaseAdapter instanceof ArrayAdapter<?>) {
            // fix #35 dirty trick !
            // if ArrayAdapter we assume that items manipulation will come from
            // it
            ((ArrayAdapter<?>) mDecoratedBaseAdapter)
                    .propagateNotifyDataSetChanged(this);
        }
        mSwipeDismissListViewTouchListener = createListViewTouchListener(listView);
        mSwipeDismissListViewTouchListener
                .setIsParentHorizontalScrollContainer(isParentHorizontalScrollContainer());
        mSwipeDismissListViewTouchListener.setTouchChild(getTouchChild());
        listView.setOnTouchListener(mSwipeDismissListViewTouchListener);
    }

    @Override
    public void setIsParentHorizontalScrollContainer(
            boolean isParentHorizontalScrollContainer) {
        super.setIsParentHorizontalScrollContainer(isParentHorizontalScrollContainer);
        if (mSwipeDismissListViewTouchListener != null) {
            mSwipeDismissListViewTouchListener
                    .setIsParentHorizontalScrollContainer(isParentHorizontalScrollContainer);
        }
    }

    @Override
    public void notifyDataSetChanged() {
        super.notifyDataSetChanged();
        if (mSwipeDismissListViewTouchListener != null) {
            mSwipeDismissListViewTouchListener.notifyDataSetChanged();
        }
    }

    @Override
    public void setTouchChild(int childResId) {
        super.setTouchChild(childResId);
        if (mSwipeDismissListViewTouchListener != null) {
            mSwipeDismissListViewTouchListener.setTouchChild(childResId);
        }
    }
}