package ndhu.landis.campusmap;

import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class Main_Frame extends Activity {
	
	public static final String currentTAG = "CurrentFragmentTag";
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main_frame);
		
		//Fragment 創建設定
		Main_Fragment fragment;
		if (savedInstanceState != null){
			fragment = (Main_Fragment) getFragmentManager().findFragmentByTag("Main Frame");
		}
		else {
			fragment = new Main_Fragment();
			FragmentManager manager = getFragmentManager();
			FragmentTransaction transaction = manager.beginTransaction();
			transaction.add(R.id.main_frame, fragment, "Main Frame");
			transaction.addToBackStack(null);
			transaction.commit();
		}
						
	}

	// 以下為選單設定部分。
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		
		switch (item.getItemId())
		{
		case R.id.open_calendar:{
			startActivity(new Intent(this, calendar.class));
			break;
		}
		case R.id.main_activity:{
			startActivity(new Intent(this, intro_menu.class));
			break;
		}
		case R.id.about_app:{
			Toast.makeText(this, "Beta one", Toast.LENGTH_SHORT).show();
			break;
		}
		case R.id.exit:{
			FragmentManager manager = getFragmentManager();
		    FragmentTransaction transaction = manager.beginTransaction();
		    // 檢查 popBackStack 的狀態
		    if (manager.getBackStackEntryCount() > 0) {          
		        manager.popBackStack();
		        transaction.commit();    
		    }
		    else {
		        super.finish();
		    }
		    			
		}
			
		}
		
		return super.onOptionsItemSelected(item);
	}
	
}