package com.lianxin.pubqq.main.TitleMenu;

import java.util.ArrayList;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;

import com.lianxin.pubqq.R;
import com.lianxin.pubqq.main.widght.ViewHolder;

/**
 * 功能描述：标题按钮上的弹窗（继承自PopupWindow）
 */
public class TitlePopup extends PopupWindow {
	private Context mContext;

	// 列表弹窗的间隔
	protected final int LIST_PADDING = 10;

	// 实例化一个矩形
	private Rect mRect = new Rect();

	// 坐标的位置（x、y）
	private final int[] mLocation = new int[2];

	// 屏幕的宽度和高度
	private int mScreenWidth, mScreenHeight;

	// 判断是否需要添加或更新列表子类项
	private boolean mIsDirty;

	// 位置不在中心
	private int popupGravity = Gravity.NO_GRAVITY;

	// 弹窗子类项选中时的监听
	private OnItemOnClickListener mItemOnClickListener;

	// 定义列表对象
	private ListView mListView;

	// 定义弹窗子类项列表
	private ArrayList<ActionItem> mActionItems = new ArrayList<ActionItem>();

	public TitlePopup(Context context) {
		// 设置布局的参数
		this(context, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
	}

	public TitlePopup(Context context, int width, int height) {
		this.mContext = context;

		// 设置可以获得焦点
		setFocusable(true);
		// 设置弹窗内可点击
		setTouchable(true);
		// 设置弹窗外可点击
		setOutsideTouchable(true);

		// 获得屏幕的宽度和高度
		WindowManager wm = (WindowManager) context
				.getSystemService(Context.WINDOW_SERVICE);
		mScreenWidth = wm.getDefaultDisplay().getWidth();
		mScreenHeight = wm.getDefaultDisplay().getHeight();

		// 设置弹窗的宽度和高度
		setWidth(width);
		setHeight(height);

		setBackgroundDrawable(new BitmapDrawable());

		// 设置弹窗的布局界面
		setContentView(LayoutInflater.from(mContext).inflate(
				R.layout.title_popup, null));
		setAnimationStyle(R.style.AnimHead);
		initUI();
	}

	/**
	 * 初始化弹窗列表
	 */
	private void initUI() {
		mListView = (ListView) getContentView().findViewById(R.id.title_list);

		mListView.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int index,
					long arg3) {
				// 点击子类项后，弹窗消失
				dismiss();

				if (mItemOnClickListener != null)
					mItemOnClickListener.onItemClick(mActionItems.get(index),
							index);
			}
		});
	}

	/**
	 * 显示弹窗列表界面
	 */
	public void show(View view) {
		// 获得点击屏幕的位置坐标
		view.getLocationOnScreen(mLocation);

		// 设置矩形的大小
		mRect.set(mLocation[0], mLocation[1], mLocation[0] + view.getWidth(),
				mLocation[1] + view.getHeight());

		// 判断是否需要添加或更新列表子类项
		if (mIsDirty) {
			populateActions();
		}

		// 显示弹窗的位置
		showAtLocation(view, popupGravity, mScreenWidth - LIST_PADDING
				- (getWidth() / 2), mRect.bottom);
	}

	/**
	 * 设置弹窗列表子项
	 */
	private void populateActions() {
		mIsDirty = false;

		// 设置列表的适配器
		mListView.setAdapter(new BaseAdapter() {
			@Override
			public View getView(int position, View convertView, ViewGroup parent) {
				if (convertView == null) {
					convertView = LayoutInflater.from(mContext).inflate(
							R.layout.layout_item_pop, parent, false);
				}
				TextView textView = ViewHolder.get(convertView, R.id.txt_title);
				textView.setTextColor(mContext.getResources().getColor(
						android.R.color.white));
				textView.setTextSize(16);
				// 设置文本居中
				 textView.setGravity(Gravity.CENTER_VERTICAL);
				// // 设置文本域的范围
				// textView.setPadding(0, 10, 0, 10);
				// 设置文本在一行内显示（不换行）
				textView.setSingleLine(true);

				ActionItem item = mActionItems.get(position);

				// 设置文本文字
				textView.setText(item.mTitle);
				if (item.mDrawable != null) {
					// 设置文字与图标的间隔
					textView.setCompoundDrawablePadding(10);
					// 设置在文字的左边放一个图标
					textView.setCompoundDrawablesWithIntrinsicBounds(
							item.mDrawable, null, null, null);
				}
				return convertView;
			}

			@Override
			public long getItemId(int position) {
				return position;
			}

			@Override
			public Object getItem(int position) {
				return mActionItems.get(position);
			}

			@Override
			public int getCount() {
				return mActionItems.size();
			}
		});
	}

	/**
	 * 添加子类项
	 */
	public void addAction(ActionItem action) {
		if (action != null) {
			mActionItems.add(action);
			mIsDirty = true;
		}
	}

	/**
	 * 清除子类项
	 */
	public void cleanAction() {
		if (mActionItems.isEmpty()) {
			mActionItems.clear();
			mIsDirty = true;
		}
	}

	/**
	 * 根据位置得到子类项
	 */
	public ActionItem getAction(int position) {
		if (position < 0 || position > mActionItems.size())
			return null;
		return mActionItems.get(position);
	}

	/**
	 * 设置监听事件
	 */
	public void setItemOnClickListener(
			OnItemOnClickListener onItemOnClickListener) {
		this.mItemOnClickListener = onItemOnClickListener;
	}

	/**
	 * @author yangyu 功能描述：弹窗子类项按钮监听事件
	 */
	public static interface OnItemOnClickListener {
		public void onItemClick(ActionItem item, int position);
	}
}