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# Example: Simple Calendar with Selection

This example demonstrates how to instantiate a simple Calendar, with an initial date setting as of today. The Calendar is preconfigured to show the previous and next month's dates.

Try clicking on the toggle buttons to change the initial settings for showing the previous and next months' dates. You can also select dates in the calendar and see selected date on the right, reported via a `selectionChange` event, and formatted using DataType utility.

Selected date:

## Complete Example Source

Note: be sure to add the `yui3-skin-sam` classname to the page's `<body>` element or to a parent element of the widget in order to apply the default CSS skin. See Understanding Skinning.

    <!-- Add an additional blue button style -->
    <style>
    .yui3-button {
        margin:10px 0px 10px 0px;
        color: #fff;
        background-color: #3476b7;
    }
    </style>

    <div id="demo" class="yui3-skin-sam yui3-g"> <!-- You need this skin class -->
      <div id="leftcolumn" class="yui3-u">
         <!-- Container for the calendar -->
         <div id="mycalendar"></div>
      </div>
      <div id="rightcolumn" class="yui3-u">
       <div id="links" style="padding-left:20px;">
          <!-- The buttons are created simply by assigning the correct CSS class -->
          <button id="togglePrevMonth" class="yui3-button">Toggle Previous Month's Dates</button><br>
          <button id="toggleNextMonth" class="yui3-button">Toggle Next Month's Dates</button><br>
          Selected date: <span id="selecteddate"></span>
       </div>
      </div>
    </div>

    <script type="text/javascript">
    YUI().use('calendar', 'datatype-date', 'cssbutton',  function(Y) {

        // Create a new instance of calendar, placing it in
        // #mycalendar container, setting its width to 340px,
        // the flags for showing previous and next month's
        // dates in available empty cells to true, and setting
        // the date to today's date.
        var calendar = new Y.Calendar({
          contentBox: "#mycalendar",
          width:'340px',
          showPrevMonth: true,
          showNextMonth: true,
          date: new Date()}).render();

        // Get a reference to Y.DataType.Date
        var dtdate = Y.DataType.Date;

        // Listen to calendar's selectionChange event.
        calendar.on("selectionChange", function (ev) {

          // Get the date from the list of selected
          // dates returned with the event (since only
          // single selection is enabled by default,
          // we expect there to be only one date)
          var newDate = ev.newSelection[0];

          // Format the date and output it to a DOM
          // element.
          Y.one("#selecteddate").setHTML(dtdate.format(newDate));
        });

        // When the 'Show Previous Month' link is clicked,
        // modify the showPrevMonth property to show or hide
        // previous month's dates
        Y.one("#togglePrevMonth").on('click', function (ev) {
          ev.preventDefault();
          calendar.set('showPrevMonth', !(calendar.get("showPrevMonth")));
        });

        // When the 'Show Next Month' link is clicked,
        // modify the showNextMonth property to show or hide
        // next month's dates
        Y.one("#toggleNextMonth").on('click', function (ev) {
          ev.preventDefault();
          calendar.set('showNextMonth', !(calendar.get("showNextMonth")));
        });
    });
    </script>