package nextrek.widgets.rubberlist;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListView;

public class RubberListView extends ListView implements OnScrollListener {

    public RubberListView(Context context) {
        super(context);
        init(context);
    }

    public RubberListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public RubberListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }
    
    private void init(Context context) {
        super.setOnScrollListener(this);
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

        if (mRubberTopWidget != null) {
            mRubberTopWidget.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }
        
        if (mRubberBottomWidget != null) {
            mRubberBottomWidget.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }

        if (mOnScrollListener != null) {
            mOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }
    }
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (mRubberTopWidget != null) {
            mRubberTopWidget.onScrollStateChanged(view, scrollState);
        }
        
        if (mRubberBottomWidget != null) {
            mRubberBottomWidget.onScrollStateChanged(view, scrollState);
        }

        if (mOnScrollListener != null) {
            mOnScrollListener.onScrollStateChanged(view, scrollState);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (mRubberTopWidget != null) {
            mRubberTopWidget.onTouch(this, event);
        }

        if (mRubberBottomWidget != null) {
            mRubberBottomWidget.onTouch(this, event);
        }
        
        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (!isVerticalScrollBarEnabled()) {
                setVerticalScrollBarEnabled(true);
            }
        }

        return super.onTouchEvent(event);
    }

    /**
     * Listener that will receive notifications every time the list scrolls.
     */
    private OnScrollListener mOnScrollListener = null;

    /**
     * Set the listener that will receive notifications every time the list
     * scrolls.
     * 
     * @param listener
     *            The scroll listener.
     */
    @Override
    public void setOnScrollListener(AbsListView.OnScrollListener listener) {
        mOnScrollListener = listener;
    }
    

    private IRubberWidgetController mRubberTopWidget = null;
    public void setRubberHeaderWidget(IRubberWidgetController widget) {
        mRubberTopWidget = widget;
    }

    private IRubberWidgetController mRubberBottomWidget = null;
    public void setRubberFooterWidget(IRubberWidgetController widget) {
        mRubberBottomWidget = widget;
    }
}