Change color of past events in Fullcalendar

Question

I'm trying to implement this solution to "grey out" past events in Fullcalendar, but I'm not having any luck. I'm not too well versed in Javascript, though, so I assume I'm making some dumb mistakes.

I've been putting the suggested code into fullcalendar.js, inside the call for daySegHTML(segs) around line 4587.

I added the first two lines at the end of the function's initial var list (Why not, I figured)—so something like this:

...
var leftCol;
var rightCol;
var left;
var right;
var skinCss;

var hoy = new Date;// get today's date
hoy = parseInt((hoy.getTime()) / 1000); //get today date in unix

var html = '';
...

Then, just below, I added the other two lines inside the loop:

for (i=0; i<segCnt; i++) {
    seg = segs[i];
    event = seg.event;
    classes = ['fc-event', 'fc-event-skin', 'fc-event-hori'];
    if (isEventDraggable(event)) {
        classes.push('fc-event-draggable');
    }

    unixevent = parseInt((event.end.getTime()) / 1000); //event date in Unix
    if (unixevent < hoy) {classes.push('fc-past');} //add class if event is old

    if (rtl) {
        if (seg.isStart) {
            classes.push('fc-corner-right');
        }
...

Running this code results in a rendered calendar with no events displayed and an error message: Uncaught TypeError: Cannot call method 'getTime' of null

The "null" being referred to is, apparently, event.end.getTime(). But I'm not sure I understand what exactly is going wrong, or how things are being executed. As written, it seems like it should work. At this point in the code, from what I can tell, event.end contains a valid IETF timecode, but for some reason it's "not there" when I try to run it through getTime()?

This isn't a mission-critical tweak for me, but would still be nice—and I'd like to understand what's going on and what I'm doing wrong, as well! Any help greatly appreciated!

Answer 1

If you are using FullCalendar2 with Google Calendar, you will need to use the version of the code below. This uses Moment.js to do some conversions, but since FC2 requires it, you'll be using it already.

        eventRender: function(event, element, view) {                   
            var ntoday = new Date().getTime();
            var eventEnd = moment( event.end ).valueOf();
            var eventStart = moment( event.start ).valueOf();
            if (!event.end){
                if (eventStart < ntoday){
                    element.addClass("past-event");
                    element.children().addClass("past-event");
                }
            } else {
                if (eventEnd < ntoday){
                    element.addClass("past-event");
                    element.children().addClass("past-event");
                }
            }
        }

Answer 2

As per FullCalendar v1.6.4

Style past events in css:

.fc-past{background-color:red;}

Style future events in css:

.fc-future{background-color:red;}