/**
 *  boolean flag used to determine if user 
 *  has pending preference modifications which
 *  require saving
 **/
var preferencesChangedFlag = false;


/**
 * Hides a div
 * 
 * id - String variable for the div to be hidden
 *
 **/
function hide(id)
{ 
    if ( id != null )
        div = document.getElementById(id);
    
    if (div != null) 
    {
        div.style.visibility = 'hidden';
        div.style.display = 'none';
    }
} 

/**
 * Shows a div
 * 
 * id - String variable for the div to be shown
 *
 **/
function show(id)
{
    if ( id != null )
        div = document.getElementById(id);
    
    if (div != null) 
    {
       div.style.visibility = 'visible';
       div.style.display = '';
    }
}

/**
 * Closes a portlet and saves the state of the portlet
 * 
 * id - portlet ID variable 
 *
 **/
function closePortlet(id)
{
    if ( id != null )
    {
        hide('P_' + id );
        savePortletState(id,'0');
    }
    
}

/**
 * Expands a the portlet by showing both
 * the portlet outter table and the portlet 
 * body table
 * 
 * id - portlet ID variable 
 *
 **/
function maximizePortlet(id)
{
    if ( id != null )
    {
        show('PB_' + id);
        show('P_' + id );
        
        savePortletState(id,'2');
    } 
} 

/**
 * Minimizes a the portlet by setting the 
 * portlet outter table to visible and hidding 
 * the portlet body table.  
 * 
 * id - portlet ID variable 
 *
 **/
function minimizePortlet(id)
{
    if ( id != null )
    {
            show('P_' + id );
            hide('PB_' + id );
            savePortletState(id,'1');
    }
}

/**
 * Flips the state of portlet between minimized 
 * and maximized based on the current visibility
 * of the portlet body table.    
 * 
 * id - portlet ID variable 
 *
 **/
function togglePortlet(id)
{ 
    if ( id != null )
    {
        div = document.getElementById('PB_' + id );
        if ( div != null )
        {
            if (div.style.visibility == 'hidden')
            { 
                maximizePortlet(id);
                setMinimizedImage(id);
            }
            else
            {
                minimizePortlet(id); 
                setMaximizedImage(id);
            }   
        }
    }
}

/**
 * Displays the maximized image button
 * 
 * id - portlet ID variable 
 *
 **/
function setMaximizedImage(id) 
{
   
    if ( id != null ){
        div = document.getElementById('IM_' + id );
        if ( div !=null ) {
        div.src = '/CFODirectWeb/resources/newimages/maximize.gif';
        }
    }
}

/**
 * Displays the minimized image button
 * 
 * id - portlet ID variable 
 *
 **/
function setMinimizedImage(id) 
{
    
    if ( id != null ){
        div = document.getElementById('IM_' + id );
        if ( div !=null ) {
        div.src = '/CFODirectWeb/resources/newimages/minimize.gif';
        }
    }
}

/**
 * Sends the url request to save the current portlet states 
 * using ajax 
 *
 **/
function savePortletDisplayStates()
{ 
   if ( preferencesChangedFlag ) { 
       url = location.protocol + '//'  +  location.host + '/CFODirectWeb/cfocustom/preference/PreferenceController.jpf?savePortletDisplayStates=Y';
       sendXMLHttpRequest(url);
    }
  
}


/**
 * Sends the url request to save a single portlet state 
 * using ajax.
 *
 * id - portlet ID variable 
 * state - state of the portlet 0,1,2 (closed,min,max)
 *
 **/
function savePortletState(id, state)
{ 
    if ( id != null && location !=null ){
        preferencesChangedFlag = true;
        url = location.protocol + '//'  +  location.host + '/CFODirectWeb/cfocustom/preference/PreferenceController.jpf?portletId=' + id + '&state=' + state;
        sendXMLHttpRequest(url);
    }
}
/**
 * Sends the url request to save the current portlet states 
 * using ajax 
 *
 **/
function saveSummaryStates(state)
{ 
   //if ( preferencesChangedFlag ) { 
       url = location.protocol + '//'  +  location.host + '/CFODirectWeb/cfocustom/summary/SummaryController.jpf?SUMMARY_STATE='+state;
       sendXMLHttpRequest(url);
   // }
  
}

 
/**
 * Sends the url request to save a single portlet state 
 * using ajax.
 *
 * id - portlet ID variable 
 * state - state of the portlet 0,1,2 (closed,min,max)
 *
 **/
function saveSummaryStatesWithId(id, state)
{ 
    if ( id != null && location !=null ){
        preferencesChangedFlag = true;
        url = location.protocol + '//'  +  location.host + '/CFODirectWeb/cfocustom/summary/SummaryController.jpf?SUMMARY_STATE=' + id + '&state=' + state;
        sendXMLHttpRequest(url);
    }
}
/**
 * Sends a XMLHttpRequest using ajax
 *
 **/
function sendXMLHttpRequest(url) 
{
    var req;
    
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.open("GET", url, true);
        req.send(null);
    } 
    else if (window.ActiveXObject) 
    {
        // branch for IE/Windows ActiveX version
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.open("GET", url, true);
            req.send();
        }
    }
}