[Plugin: WP Calendar] Maybe you can add this tip in FAQ (how to hide event widget)

I needed to hide the widget if there was no event to have no “ugly” empty block in my website.

It’s not so difficult :

1. Install and activate extension “Widget Logic Visual”

2. Edit function.php in wordpress install directory and add at the end :

function has_calendar_events() {
    if ( count( fse_get_events(array()) ) > 0 ) {   // test to see if there are some events to display
        return true;
    } else {
        return false;
    }
}

3. Then use “Edit Limitation” in the widget options. Select “Using Conditional Tag Code ( Advanced )”.
Fill conditional code with value :
has_calendar_events()
And tick “activate code”.

http://wordpress.org/extend/plugins/wp-calendar/