EhViewer/src/com/hippo/ehviewer/widget/HfListView.java

package com.hippo.ehviewer.widget;

import com.hippo.ehviewer.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout;

/**
 * TODO disable pull refreshing when footer refreshing
 * 
 * @author Hippo
 *
 */
public class HfListView extends PullToRefreshLayout
        implements AbsListView.OnScrollListener {
    
    private final static int FOOTER_REFRESHING = 0;
    private final static int FOOTER_SUCCESS = 1;
    private final static int FOOTER_FAIL = 2;
    
    private Context mContext;
    private FswListView mListView;
    
    private View mFooter;
    private TextView mFooterTipTextView;
    private ProgressBar mFooterProgressBar;
    private int footerState = FOOTER_SUCCESS;
    private OnFooterRefreshListener mFooterRefreshListener;
    
    // Footer String to show
    private String mFooterRefreshStr;
    private String mFooterSuccessStr;
    private String mFooterFailStr;
    
    public HfListView(Context context) {
        super(context);
        mContext = context;
        init();
    }
    
    public HfListView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    
    public HfListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        init();
    }
    
    private void init() {
        mListView = new FswListView(mContext);
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT);
        addView(mListView, lp);
        
        mListView.setOnScrollListener(this);
        mFooter = (LinearLayout)LayoutInflater.from(mContext)
                .inflate(R.layout.pull_list_view_footer, null);
        mFooterTipTextView = (TextView)mFooter.findViewById(R.id.footer_tip_text);
        mFooterProgressBar = (ProgressBar)mFooter.findViewById(R.id.footer_progressBar);
        mFooter.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isAnyRefreshing() && footerState == FOOTER_FAIL)
                    footerRefresh();
            }
        });
        changeFooterViewByState();
        mListView.addFooterView(mFooter);
    }
    
    public FswListView getListView() {
        return mListView;
    }
    
    public void setOnFooterRefreshListener(OnFooterRefreshListener l) {
        mFooterRefreshListener = l;
    }
    
    private void footerRefresh() {
        if (mFooterRefreshListener.onFooterRefresh()) {
            footerState = FOOTER_REFRESHING;
            changeFooterViewByState();
        }
    }
    
    /**
     * Set footer UI String
     * 
     * @param refreshStr
     * @param successStr
     * @param failStr
     */
    public void setFooterString(String refreshStr, String successStr, String failStr) {
        mFooterRefreshStr = refreshStr;
        mFooterSuccessStr = successStr;
        mFooterFailStr = failStr;
        
        switch (footerState) {
        case FOOTER_REFRESHING:
            mFooterTipTextView.setText(mFooterRefreshStr);
            break;
        case FOOTER_SUCCESS:
            mFooterTipTextView.setText(mFooterSuccessStr);
            break;
        case FOOTER_FAIL:
            mFooterTipTextView.setText(mFooterFailStr);
            break;
        }
    }
    
    /**
     * Refresh footer UI
     */
    private void changeFooterViewByState() {
        switch (footerState) {
        case FOOTER_REFRESHING:
            mFooterTipTextView.setText(mFooterRefreshStr);
            mFooterProgressBar.setVisibility(View.VISIBLE);
            break;
        case FOOTER_SUCCESS:
            mFooterTipTextView.setText(mFooterSuccessStr);
            mFooterProgressBar.setVisibility(View.GONE);
            break;
        case FOOTER_FAIL:
            mFooterTipTextView.setText(mFooterFailStr);
            mFooterProgressBar.setVisibility(View.GONE);
            break;
        }
    }
    
    public void setHeaderRefreshComplete() {
        super.setRefreshComplete();
    }
    
    public void setFooterRefreshComplete(boolean isSuccess) {
        if (isSuccess)
            footerState = FOOTER_SUCCESS;
        else
            footerState = FOOTER_FAIL;
        changeFooterViewByState();
    }
    
    public void setAnyRefreshComplete() {
        setAnyRefreshComplete(true);
    }
    
    public void setAnyRefreshComplete(boolean isSuccess) {
        setHeaderRefreshComplete();
        setFooterRefreshComplete(isSuccess);
    }
    
    /**
     * @return True if actionbar is refreshing
     */
    public boolean isHeaderRefreshing() {
        return isSetup() ? isRefreshing() : false;
    }
    
    /**
     * @return True if footer is refreshing
     */
    public boolean isFooterRefreshing() {
        return footerState == FOOTER_REFRESHING;
    }
    
    /**
     * @return True if actionbar or footer is refreshing
     */
    public boolean isAnyRefreshing() {
        return isHeaderRefreshing() | isFooterRefreshing();
    }
    
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {}

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCount, int totalItemCount) {
        if (firstVisibleItem + visibleItemCount == totalItemCount
                && !isAnyRefreshing() && totalItemCount > 1
                && footerState != FOOTER_FAIL)
            footerRefresh();
    }
    
    public interface OnFooterRefreshListener {
        /**
         * @return True if this refresh action is vaild
         */
        boolean onFooterRefresh();
    }
}