Format date axis depending on zoom.

by Boro

HTML

<script language="javascript" type="text/javascript" src=https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/excanvas.js></script>

<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/jquery.jqplot.js"></script>

<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.dateAxisRenderer.js"></script>

<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.cursor.js"></script>

<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.canvasTextRenderer.js"></script>
<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.canvasAxisTickRenderer.js"></script>


<div id="chart1"></div>
<button class="button-reset">Reset</button>

CSS

//jquery.jqplot.css

/*rules for the plot target div.  These will be cascaded down to all plot elements according to css rules*/
.jqplot-target {
    position: relative;
    color: #666666;
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    font-size: 1em;
/*    height: 300px;
    width: 400px;*/
}

/*rules applied to all axes*/
.jqplot-axis {
    font-size: 0.75em;
}

.jqplot-xaxis {
    margin-top: 10px;
}

.jqplot-x2axis {
    margin-bottom: 10px;
}

.jqplot-yaxis {
    margin-right: 10px;
}

.jqplot-y2axis, .jqplot-y3axis, .jqplot-y4axis, .jqplot-y5axis, .jqplot-y6axis, .jqplot-y7axis, .jqplot-y8axis, .jqplot-y9axis, .jqplot-yMidAxis {
    margin-left: 10px;
    margin-right: 10px;
}

/*rules applied to all axis tick divs*/
.jqplot-axis-tick, .jqplot-xaxis-tick, .jqplot-yaxis-tick, .jqplot-x2axis-tick, .jqplot-y2axis-tick, .jqplot-y3axis-tick, .jqplot-y4axis-tick, .jqplot-y5axis-tick, .jqplot-y6axis-tick, .jqplot-y7axis-tick, .jqplot-y8axis-tick, .jqplot-y9axis-tick, .jqplot-yMidAxis-tick {
    position: absolute;
    white-space: pre;
}


.jqplot-xaxis-tick {
    top: 0px;
    /* initial position untill tick is drawn in proper place */
    left: 15px;
/*    padding-top: 10px;*/
    vertical-align: top;
}

.jqplot-x2axis-tick {
    bottom: 0px;
    /* initial position untill tick is drawn in proper place */
    left: 15px;
/*    padding-bottom: 10px;*/
    vertical-align: bottom;
}

.jqplot-yaxis-tick {
    right: 0px;
    /* initial position untill tick is drawn in proper place */
    top: 15px;
/*    padding-right: 10px;*/
    text-align: right;
}

.jqplot-yaxis-tick.jqplot-breakTick {
    right: -20px;
    margin-right: 0px;
    padding:1px 5px 1px 5px;
/*    background-color: white;*/
    z-index: 2;
    font-size: 1.5em;
}

.jqplot-y2axis-tick, .jqplot-y3axis-tick, .jqplot-y4axis-tick, .jqplot-y5axis-tick, .jqplot-y6axis-tick, .jqplot-y7axis-tick, .jqplot-y8axis-tick, .jqplot-y9axis-tick {
    left: 0px;
    /* initial position untill...

JavaScript

//A solution for printing issue (incorrect canvas allignment) in ie7 & ie8 taken from http://blog.muonlab.com/2010/06/02/getting-position-absolute-canvas-elements-to-print-correctly-in-ie/
(function($) {
        $.fn.CanvasHack = function() {
                var canvases = this.find('canvas').filter(function() {
                        return $(this).css('position') == 'absolute';
                });

                canvases.wrap(function() {
                        var canvas = $(this);
                        var div = $('<div />').css({
                                position: 'absolute',
                                top: canvas.css('top'),
                                left: canvas.css('left')
                        });
                        canvas.css({
                                top: '0',
                                left: '0'
                        });
                        return div;
                });

                return this;
        };
})(jQuery);


$(document).ready(function() {
    var goog = [["6/22/2009 16:00:00", 425.32],
                                        ["6/8/2009 16:00:00", 424.84],
                                        ["5/26/2009 16:00:00", 417.23],
                                        ["5/11/2009 16:00:00", 390],
                                        ["4/27/2009 16:00:00", 393.69],
                                        ["4/13/2009 16:00:00", 392.24],
                                        ["3/30/2009 16:00:00", 369.78],
                                        ["3/16/2009 16:00:00", 330.16],
                                        ["3/2/2009 16:00:00", 308.57],
                                        ["2/17/2009 16:00:00", 346.45],
                                        ["2/2/2009 16:00:00", 371.28],
                                        ["1/20/2009 16:00:00", 324.7],
                                        ["1/5/2009 16:00:00", 315.07],
                                        ["12/22/2008...