gecko-dev/calendar/resources/content/weekView.js

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is OEone Calendar Code, released October 31st, 2001.
 *
 * The Initial Developer of the Original Code is
 * OEone Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Garth Smedley <garths@oeone.com>
 *                 Mike Potter <mikep@oeone.com>
 *                 Colin Phillips <colinp@oeone.com> 
 *                 Eric Belhaire <belhaire@ief.u-psud.fr> 
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/*-----------------------------------------------------------------
*   WeekView Class, subclass of CalendarView
*
*   PROPERTIES
*      gHeaderDateItemArray   - Array of text boxes used to display the dates 
*                               of the currently displayed week.
*   

*/

var gRefColumnIndex = 0;

// Make WeekView inherit from CalendarView
WeekView.prototype = new CalendarView();
WeekView.prototype.constructor = WeekView;

/**
*   WeekView Constructor.
*   
*   PARAMETERS
*      calendarWindow     - the owning instance of CalendarWindow.
*   
*/
function WeekView( calendarWindow )
{
   this.superConstructor( calendarWindow );
   
   //set the time on the left hand side labels
   //need to do this in JavaScript to preserve formatting
   for( var i = 0; i < 24; i++ ) {
      var TimeToFormat = new Date();
      TimeToFormat.setHours( i );
      TimeToFormat.setMinutes( "0" );
      
      var FormattedTime = calendarWindow.dateFormater.getFormatedTime( TimeToFormat );
      
      var Label = document.getElementById( "week-view-hour-" + i );
      Label.setAttribute( "value", FormattedTime );
   }
   
   // get week view header items
   gHeaderDateItemArray = new Array();
   for( var dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
      var headerDateItem = document.getElementById( "week-header-date-" + dayIndex );
      gHeaderDateItemArray[ dayIndex ] = headerDateItem;
   }
   
   var weekViewEventSelectionObserver = 
   {
      onSelectionChanged: function( EventSelectionArray ) {
          if( EventSelectionArray.length > 0 ) {
             //for some reason, this function causes the tree to go into a select / unselect loop
             //putting it in a settimeout fixes this.
             setTimeout( "gCalendarWindow.weekView.clearSelectedDate();", 1 );
            
             var i = 0;
             for( i = 0; i < EventSelectionArray.length; i++ ) {
                 gCalendarWindow.weekView.selectBoxForEvent( EventSelectionArray[i] );
             }
          } else {
             //select the proper day
             gCalendarWindow.weekView.hiliteSelectedDate();
          }
      }
   }
   calendarWindow.EventSelection.addObserver( weekViewEventSelectionObserver );
}

/** PUBLIC
*
*   Redraw the events for the current week
*/
WeekView.prototype.refreshEvents = function( )
{
   this.kungFooDeathGripOnEventBoxes = new Array();
   
   var eventBoxList = document.getElementsByAttribute( "eventbox", "weekview" );
   while( eventBoxList.item(0) ) {
      var eventBox = eventBoxList[ 0 ];
      eventBox.parentNode.removeChild( eventBox );
   }
   
   for( var dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
      var headerDateItem = document.getElementById( "week-header-date-" + dayIndex );
      headerDateItem.numEvents = 0;
   }
   
   //get the all day box.
   var AllDayRow = document.getElementById( "week-view-allday-row" ) ;
   AllDayRow.setAttribute( "collapsed", "true" );
   
   //expand the day's content box by setting allday to false..
   document.getElementById( "week-view-content-box" ).removeAttribute( "allday" );
   var allDayExist = false ;
   
   //initialize view limits from prefs
   var LowestStartHour = getIntPref( this.calendarWindow.calendarPreferences.calendarPref, "event.defaultstarthour", 8 );
   var HighestEndHour = getIntPref( this.calendarWindow.calendarPreferences.calendarPref, "event.defaultendhour", 17 );
   
   var allDayEventList = new Array();
   var normalEventList = new Array();   
   var eventList = new Array();
   
   for ( dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
      // get the events for the day and loop through them
      var dayToGet = new Date( gHeaderDateItemArray[dayIndex].getAttribute( "date" ) );
      
      var dayToGetDay = dayToGet.getDay() ;
      if( gOnlyWorkdayChecked === "true" && ( dayToGetDay == 0 || dayToGetDay == 6 )) {
         continue ;
      }
      
      eventList[dayIndex] = gEventSource.getEventsForDay( dayToGet );
      allDayEventList[dayIndex] = new Array();
      normalEventList[dayIndex] = new Array();
      
      // get limits for current day
      var limits = this.getViewLimits(eventList[dayIndex], dayToGet);
      
      if( limits.startHour < LowestStartHour ) {
         LowestStartHour = limits.startHour;
      }
      if( limits.endHour > HighestEndHour ) {
         HighestEndHour = limits.endHour;
      }
      //divide events into allday and normal (non-allday) events
      for ( var i = 0; i < eventList[dayIndex].length; i++ ) {
         if( eventList[dayIndex][i].event.allDay == true ) {
            allDayEventList[dayIndex].push(eventList[dayIndex][i]); 
            allDayExist = true;
         } else {
            normalEventList[dayIndex].push(eventList[dayIndex][i]); 
         }
      }
   }
   
   if ( allDayExist == true ) {
      //show the all day box 
      AllDayRow.removeAttribute( "collapsed" );
      
      //shrink the day's content box.
      document.getElementById( "week-view-content-box" ).setAttribute( "allday", "true" );
   }
   
   //now hide those that aren't applicable
   for( i = 0; i < 24; i++ ) {
      document.getElementById( "week-view-row-"+i ).removeAttribute( "collapsed" );
   }
   for( i = 0; i < LowestStartHour; i++ ) {
      document.getElementById( "week-view-row-"+i ).setAttribute( "collapsed", "true" );
   }
   for( i = ( HighestEndHour + 1 ); i < 24; i++ ) {
      document.getElementById( "week-view-row-"+i ).setAttribute( "collapsed", "true" );
   }
   
   //START FOR LOOP FOR DAYS---> 
   for ( dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
      dayToGet = new Date( gHeaderDateItemArray[dayIndex].getAttribute( "date" ) );
      dayToGetDay = dayToGet.getDay() ;
      if( gOnlyWorkdayChecked == "true" && ( dayToGetDay == 0 || dayToGetDay == 6 )) {
        /* its a weekend */
        continue ;
      }
     
      // Calculate event draw properties (where events are drawn on view)
      this.setDrawProperties(normalEventList[dayIndex]);
      
      // Add non-allday events to DOM
      for ( var i = 0; i < normalEventList[dayIndex].length; ++i )
      {
         eventBox = this.createEventBox( normalEventList[dayIndex][i] );
         document.getElementById( "week-view-content-board" ).appendChild( eventBox );
         this.kungFooDeathGripOnEventBoxes.push( eventBox );
      }
      
      //
      //Everything below this point is old code that will be changed in the near future.
      //It only deals with allday events
      //
      var ThisDayAllDayBox = document.getElementById( "all-day-content-box-week-"+dayIndex );
      while ( ThisDayAllDayBox.hasChildNodes() ) {
         ThisDayAllDayBox.removeChild( ThisDayAllDayBox.firstChild );
      }
      
      for ( var eventIndex = 0; eventIndex < eventList[dayIndex].length; ++eventIndex ) {
         calendarEventDisplay = eventList[dayIndex][ eventIndex ];
         
         // get the day box for the calendarEvent's day
         var weekBoxItem = gHeaderDateItemArray[ dayIndex ];
         
         // Display no more than three, show dots for the events > 3
         if ( calendarEventDisplay.event.allDay != true ) {
            weekBoxItem.numEvents += 1;
         }
         
         //if its an all day event, don't show it in the hours bulletin board.
         if ( calendarEventDisplay.event.allDay == true ) {
            // build up the text to show for this event
            var eventText = calendarEventDisplay.event.title;
            if( calendarEventDisplay.event.location ) {
               eventText += " " + calendarEventDisplay.event.location;
            }
            
            if( calendarEventDisplay.event.description ) {
               eventText += " " + calendarEventDisplay.event.description;
            }
            
            //note the use of the WeekViewAllDayText Attribute.
            //This is used to remove the text when the day is changed.
            newHTMLNode = document.createElement( "label" );
            newHTMLNode.setAttribute( "crop", "end" );
            newHTMLNode.setAttribute( "flex", "1" );
            newHTMLNode.setAttribute( "value", eventText );
            newHTMLNode.setAttribute( "WeekViewAllDayText", "true" );
            newHTMLNode.calendarEventDisplay = calendarEventDisplay;
            newHTMLNode.setAttribute( "onmouseover", "gCalendarWindow.changeMouseOverInfo( calendarEventDisplay, event )" );
            newHTMLNode.setAttribute( "onclick", "weekEventItemClick( this, event )" );
            newHTMLNode.setAttribute( "ondblclick", "weekEventItemDoubleClick( this, event )" );
            newHTMLNode.setAttribute( "tooltip", "eventTooltip" );
         
            newImage = document.createElement("image");
            newImage.setAttribute( "class", "all-day-event-class" );
            newImage.setAttribute( "WeekViewAllDayText", "true" );
            newImage.calendarEventDisplay = calendarEventDisplay;
            newImage.setAttribute( "onmouseover", "gCalendarWindow.changeMouseOverInfo( calendarEventDisplay, event )" );
            newImage.setAttribute( "onclick", "weekEventItemClick( this, event )" );
            newImage.setAttribute( "ondblclick", "weekEventItemDoubleClick( this, event )" );
            newImage.setAttribute( "tooltip", "eventTooltip" );
            
            ThisDayAllDayBox.appendChild( newImage );
            ThisDayAllDayBox.appendChild( newHTMLNode );
         }
         
         if( this.calendarWindow.EventSelection.isSelectedEvent( calendarEventDisplay.event ) ) {
            this.selectBoxForEvent( calendarEventDisplay.event );
         }
      }
   } //--> END THE FOR LOOP FOR THE WEEK VIEW
}

/** PRIVATE
*
*   This creates an event box for the week view
*/
WeekView.prototype.createEventBox = function ( calendarEventDisplay )
{
   var eventText = calendarEventDisplay.event.title;
   
   var displayDateObject = new Date( calendarEventDisplay.displayDate );
   var startHour = displayDateObject.getHours();
   var startMinutes = displayDateObject.getMinutes();
   var eventDuration = ( ( calendarEventDisplay.displayEndDate - calendarEventDisplay.displayDate ) / (60 * 60 * 1000) );
   
   var eventBox = document.createElement( "vbox" );
   eventBox.calendarEventDisplay = calendarEventDisplay;
   
   var ElementOfRef = document.getElementById("week-tree-day-"+gRefColumnIndex+"-item-"+startHour) ;
   var hourHeight = ElementOfRef.boxObject.height;
   var Height = eventDuration * hourHeight + 1 ;
   eventBox.setAttribute( "height", Height );
   
   var hourWidth = ElementOfRef.boxObject.width;
   var eventSlotWidth = Math.round( hourWidth / calendarEventDisplay.totalSlotCount );
   
   var Width = ( calendarEventDisplay.drawSlotCount * eventSlotWidth ) - 1;
   eventBox.setAttribute( "width", Width );
   
   var top = eval( ElementOfRef.boxObject.y + ( ( startMinutes/60 ) * hourHeight ) );
   top = top - ElementOfRef.parentNode.boxObject.y - 2;
   eventBox.setAttribute( "top", top );
   
   dayIndex = new Date( gHeaderDateItemArray[1].getAttribute( "date" ) );
   
   var index = displayDateObject.getDay( ) - dayIndex.getDay( );
   if( index < 0 ) {
      index = index + 7;
   }
   var boxLeft = document.getElementById("week-tree-day-"+index+"-item-"+startHour).boxObject.x - 
                 document.getElementById( "week-view-content-box" ).boxObject.x +
                 ( calendarEventDisplay.startDrawSlot * eventSlotWidth ) 
                 - 2;
   eventBox.setAttribute( "left", boxLeft );
   
   // start calendar color change by CofC
   var containerName = gCalendarWindow.calendarManager.getCalendarByName(
                         calendarEventDisplay.event.parent.server ).subject.split(":")[2];
   
   // set the event box to be of class week-view-event-class and the appropriate calendar-color class
   eventBox.setAttribute("class", "week-view-event-class " + containerName );
   
   // end calendar color change by CofC
   
   eventBox.setAttribute( "eventbox", "weekview" );
   eventBox.setAttribute( "dayindex", index+1 );
   eventBox.setAttribute( "onclick", "weekEventItemClick( this, event )" );
   eventBox.setAttribute( "ondblclick", "weekEventItemDoubleClick( this, event )" );
   eventBox.setAttribute( "ondraggesture", "nsDragAndDrop.startDrag(event,calendarViewDNDObserver);" );
   eventBox.setAttribute( "ondragover", "nsDragAndDrop.dragOver(event,calendarViewDNDObserver)" );
   eventBox.setAttribute( "ondragdrop", "nsDragAndDrop.drop(event,calendarViewDNDObserver)" );
   eventBox.setAttribute( "id", "week-view-event-box-"+calendarEventDisplay.event.id );
   eventBox.setAttribute( "name", "week-view-event-box-"+calendarEventDisplay.event.id );
   eventBox.setAttribute( "onmouseover", "gCalendarWindow.changeMouseOverInfo( calendarEventDisplay, event )" );
   eventBox.setAttribute( "tooltip", "eventTooltip" );
   
   // The event description. This doesn't go multi line, but does crop properly.
   var eventDescriptionElement = document.createElement( "label" );
   eventDescriptionElement.calendarEventDisplay = calendarEventDisplay;
   eventDescriptionElement.setAttribute( "class", "week-view-event-label-class" );
   eventDescriptionElement.setAttribute( "value", eventText );
   eventDescriptionElement.setAttribute( "flex", "1" );
   var DescriptionText = document.createTextNode( " " );
   eventDescriptionElement.appendChild( DescriptionText );
   eventDescriptionElement.setAttribute( "height", Height );
   eventDescriptionElement.setAttribute( "crop", "end" );
   eventDescriptionElement.setAttribute( "ondraggesture", "nsDragAndDrop.startDrag(event,calendarViewDNDObserver);" );
   eventDescriptionElement.setAttribute( "ondragover", "nsDragAndDrop.dragOver(event,calendarViewDNDObserver)" );
   eventDescriptionElement.setAttribute( "ondragdrop", "nsDragAndDrop.drop(event,calendarViewDNDObserver)" );
   
   eventBox.appendChild( eventDescriptionElement );
    
   this.kungFooDeathGripOnEventBoxes.push( eventBox );
   
   return( eventBox );
}

/** PUBLIC
*
*   Called when the user switches to a different view
*/
WeekView.prototype.switchFrom = function( )
{
  //Enable menu options
  document.getElementById( "only-workday-checkbox-1" ).setAttribute( "disabled", "true" );
  document.getElementById( "only-workday-checkbox-2" ).setAttribute( "disabled", "true"  );
}

/** PUBLIC
*
*   Called when the user switches to the week view
*/
WeekView.prototype.switchTo = function( )
{
   // disable/enable view switching buttons   
   var weekViewButton = document.getElementById( "week_view_command" );
   var monthViewButton = document.getElementById( "month_view_command" );
   var dayViewButton = document.getElementById( "day_view_command" );
   
   monthViewButton.removeAttribute( "disabled" );
   weekViewButton.setAttribute( "disabled", "true" );
   dayViewButton.removeAttribute( "disabled" );
   
   //Enable menu options
   document.getElementById( "only-workday-checkbox-1" ).removeAttribute( "disabled" );
   document.getElementById( "only-workday-checkbox-2" ).removeAttribute( "disabled" );
   
   // switch views in the deck
   var calendarDeckItem = document.getElementById( "calendar-deck" );
   calendarDeckItem.selectedIndex = 1;
}

/** PUBLIC
*
*   Redraw the display, but not the events
*/
WeekView.prototype.refreshDisplay = function( )
{
   var categoriesStringBundle = srGetStrBundle("chrome://calendar/locale/calendar.properties");
   var defaultWeekStart = categoriesStringBundle.GetStringFromName("defaultWeekStart" );
   
   // Set the from-to title string, based on the selected date
   var Offset = getIntPref(this.calendarWindow.calendarPreferences.calendarPref, "week.start", defaultWeekStart );
   // Define a reference column (which will not be collapsed latter) to use to get its width. 
   // This is used to place the event Box
   if (Offset == 0 || Offset == 6) {
       gRefColumnIndex = 3 ;
   }
   
   var selectedDate = this.calendarWindow.getSelectedDate();
   var viewDay = selectedDate.getDay();
   var viewDayOfMonth = selectedDate.getDate();
   var viewMonth = selectedDate.getMonth();
   var viewYear = selectedDate.getFullYear();
   
   var NewArrayOfDayNames = new Array();
   
   // Set the header information for the week view
   var i;
   for( i = 0; i < ArrayOfDayNames.length; i++ ) {
      NewArrayOfDayNames[i] = ArrayOfDayNames[i];
   }
   
   for( i = 0; i < Offset; i++ ) {
      var FirstElement = NewArrayOfDayNames.shift();
      NewArrayOfDayNames.push( FirstElement );
   }
   
   viewDay -= Offset;
   if( viewDay < 0 ) {
      viewDay += 7;
   }
   var dateOfLastDayInWeek = viewDayOfMonth + ( 6 - viewDay );
   var dateOfFirstDayInWeek = viewDayOfMonth - viewDay;
   
   var firstDayOfWeek = new Date( viewYear, viewMonth, dateOfFirstDayInWeek );
   var lastDayOfWeek = new Date( viewYear, viewMonth, dateOfLastDayInWeek );
   
   var firstDayMonthName = this.calendarWindow.dateFormater.getFormatedDateWithoutYear( firstDayOfWeek );
   var lastDayMonthName =  this.calendarWindow.dateFormater.getFormatedDateWithoutYear( lastDayOfWeek );
   
   var newoffset = (Offset >= 5) ? 8 -Offset : 1 - Offset ;
   var mondayDate = new Date( firstDayOfWeek.getFullYear(), 
                              firstDayOfWeek.getMonth(),
                              firstDayOfWeek.getDate()+newoffset );
   
   var weekNumber = DateUtils.getWeekNumber(mondayDate);
   
   var weekViewStringBundle = srGetStrBundle("chrome://calendar/locale/calendar.properties");
   var dateString = weekViewStringBundle.GetStringFromName( "Week" )+" "+weekNumber+ ": "+firstDayMonthName + " - " + lastDayMonthName ;
   
   var weekTextItem = document.getElementById( "week-title-text" );
   weekTextItem.setAttribute( "value" , dateString ); 
   /* done setting the header information */
   
   /* Fix the day names because users can choose which day the week starts on  */
   for( var dayIndex = 1; dayIndex < 8; ++dayIndex ) {
      var dateOfDay = firstDayOfWeek.getDate();
      
      var headerDateItem = document.getElementById( "week-header-date-"+dayIndex );
      headerDateItem.setAttribute( "value" , dateOfDay );
      headerDateItem.setAttribute( "date", firstDayOfWeek );
      headerDateItem.numEvents = 0;
      
      document.getElementById( "week-header-date-text-"+dayIndex ).setAttribute( "value", NewArrayOfDayNames[dayIndex-1] );
      
      var arrayOfBoxes = new Array();
      
      if( firstDayOfWeek.getDay() == 0 || firstDayOfWeek.getDay() == 6 ) {
         /* its a weekend */
         arrayOfBoxes = document.getElementsByAttribute( "day", dayIndex );
         
         if( gOnlyWorkdayChecked === "true" ) {
            document.getElementById( "weekview-column-day-"+dayIndex ).setAttribute( "collapsed", "true" );
         } else {
            document.getElementById( "weekview-column-day-"+dayIndex ).removeAttribute( "collapsed" );
         }
         
         for( i = 0; i < arrayOfBoxes.length; i++ ) {
            arrayOfBoxes[i].setAttribute( "weekend", "true" );
         }
      } else {
         /* its not a weekend */
         arrayOfBoxes = document.getElementsByAttribute( "day", dayIndex );
         for( i = 0; i < arrayOfBoxes.length; i++ ) {
            arrayOfBoxes[i].removeAttribute( "weekend" );
         }
      }
      
      // advance to next day 
      firstDayOfWeek.setDate( dateOfDay + 1 );
   }
   this.hiliteTodaysDate( );
}

/** PUBLIC
*
*   This is called when we are about the make a new event
*   and we want to know what the default start date should be for the event.
*/
WeekView.prototype.getNewEventDate = function( )
{
   return this.calendarWindow.getSelectedDate();
}

/** PUBLIC
*
*   Go to the next week.
*/
WeekView.prototype.goToNext = function()
{
   var nextWeek = new Date( this.calendarWindow.selectedDate.getFullYear(),  this.calendarWindow.selectedDate.getMonth(),  this.calendarWindow.selectedDate.getDate() + 7 );
   this.goToDay( nextWeek );
}

/** PUBLIC
*
*   Go to the previous week.
*/
WeekView.prototype.goToPrevious = function()
{
   var prevWeek = new Date(  this.calendarWindow.selectedDate.getFullYear(),  this.calendarWindow.selectedDate.getMonth(),  this.calendarWindow.selectedDate.getDate() - 7 );
   this.goToDay( prevWeek );
}

WeekView.prototype.selectBoxForEvent = function( calendarEvent )
{
   var EventBoxes = document.getElementsByAttribute( "name", "week-view-event-box-"+calendarEvent.id );
   for ( var j = 0; j < EventBoxes.length; j++ ) {
      EventBoxes[j].setAttribute( "eventselected", "true" );
   }
}

WeekView.prototype.getVisibleEvent = function( calendarEvent )
{
   var eventBox = document.getElementById( "week-view-event-box-"+calendarEvent.id );
   if ( eventBox ) {
      return eventBox;
   } else {
      return false;
   }
}


/** PRIVATE
*
*   Mark the selected date, also unmark the old selection if there was one
*/
WeekView.prototype.hiliteSelectedDate = function multiweekView_hiliteSelectedDate( )
{
   // Clear the old selection if there was one
   
   this.clearSelectedDate();
   this.clearSelectedEvent();
   
   // get the events for the day and loop through them
   var FirstDay = new Date( gHeaderDateItemArray[1].getAttribute( "date" ) );
   var LastDay  = new Date( gHeaderDateItemArray[7].getAttribute( "date" ) );
   LastDay.setHours( 23 );
   LastDay.setMinutes( 59 );
   LastDay.setSeconds( 59 );
   var selectedDay = this.calendarWindow.getSelectedDate();
   
   if ( selectedDay.getTime() > FirstDay.getTime() && selectedDay.getTime() < LastDay.getTime() ) {
      var ThisDate;
      //today is visible, get the day index for today
      for ( var dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
         ThisDate = new Date( gHeaderDateItemArray[dayIndex].getAttribute( "date" ) );
         if ( ThisDate.getFullYear() == selectedDay.getFullYear()
                && ThisDate.getMonth() == selectedDay.getMonth()
                && ThisDate.getDay()   == selectedDay.getDay() ) {
            break;
         }
      }
      //dayIndex now contains the box numbers that we need.
      for ( i = 0; i < 24; i++ ) {
         document.getElementById( "week-tree-day-"+(dayIndex-1)+"-item-"+i ).setAttribute( "weekselected", "true" );
      }
   }
}

/** PRIVATE
*
*  Mark today as selected, also unmark the old today if there was one.
*/
WeekView.prototype.hiliteTodaysDate = function( )
{
   //clear out the old today boxes.
   var OldTodayArray = document.getElementsByAttribute( "today", "true" );
   while ( OldTodayArray.item(0) ) {
      OldTodayArray[0].removeAttribute( "today" );
   }
   
   // get the events for the day and loop through them
   var FirstDay = new Date( gHeaderDateItemArray[1].getAttribute( "date" ) );
   var LastDay  = new Date( gHeaderDateItemArray[7].getAttribute( "date" ) );
   LastDay.setHours( 23 );
   LastDay.setMinutes( 59 );
   LastDay.setSeconds( 59 );
   var Today = new Date();
   
   if ( Today.getTime() > FirstDay.getTime() && Today.getTime() < LastDay.getTime() ) {
      var ThisDate;
      //today is visible, get the day index for today
      for ( var dayIndex = 1; dayIndex <= 7; ++dayIndex ) {
         ThisDate = new Date( gHeaderDateItemArray[dayIndex].getAttribute( "date" ) );
         if ( ThisDate.getFullYear() == Today.getFullYear() &&
              ThisDate.getMonth()    == Today.getMonth() &&
              ThisDate.getDay()      == Today.getDay() ) {
            break;
         }
      }
      //dayIndex now contains the box numbers that we need.
      for ( i = 0; i < 24; i++ ) {
         document.getElementById( "week-tree-day-"+(dayIndex-1)+"-item-"+i ).setAttribute( "today", "true" );
      }
   }
}

/** PUBLIC
*
*   clear the selected event by taking off the selected attribute.
*/
WeekView.prototype.clearSelectedEvent = function( )
{
   //Event = gCalendarWindow.getSelectedEvent();
   var ArrayOfBoxes = document.getElementsByAttribute( "eventselected", "true" );
   while( ArrayOfBoxes.item(0) ) {
      ArrayOfBoxes[0].removeAttribute( "eventselected" );   
   }
}

/** PUBLIC
*
*   This is called when we are about the make a new event
*   and we want to know what the default start date should be for the event.
*/
WeekView.prototype.getNewEventDate = function( )
{
   var start = new Date( this.calendarWindow.getSelectedDate() );
   start.setHours( start.getHours() );
   start.setMinutes( Math.ceil( start.getMinutes() / 5 ) * 5 );
   start.setSeconds( 0 );
   
   return start; 
}

/** PUBLIC
*
*  Unmark the selected date if there is one.
*/
WeekView.prototype.clearSelectedDate = function( )
{
   var SelectedBoxes = document.getElementsByAttribute( "weekselected", "true" );
   while( SelectedBoxes.item(0) ) {
      SelectedBoxes[0].removeAttribute( "weekselected" );
   }
}