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Current File : /var/www/html/esic/cmbeberibe/js/RGraph/libraries/RGraph.drawing.yaxis.js
// version: 2014-08-16
/**
 * o--------------------------------------------------------------------------------o
 * | This file is part of the RGraph package - you can learn more at:               |
 * |                                                                                |
 * |                          http://www.rgraph.net                                 |
 * |                                                                                |
 * | This package is licensed under the Creative Commons BY-NC license. That means  |
 * | that for non-commercial purposes it's free to use and for business use there's |
 * | a 99 GBP per-company fee to pay. You can read the full license here:           |
 * |                                                                                |
 * |                      http://www.rgraph.net/license                             |
 * o--------------------------------------------------------------------------------o
 */

/**
 * Having this here means that the RGraph libraries can be included in any order, instead of you having
 * to include the common core library first.
 */

    // Define the RGraph global variable
RGraph = window.RGraph || {isRGraph: true};
RGraph.Drawing = RGraph.Drawing || {};

/**
 * The constructor. This function sets up the object. It takes the ID (the HTML attribute) of the canvas as the
 * first argument and the X coordinate of the axis as the second
 *
 * @param string id The canvas tag ID
 * @param number x  The X coordinate of the Y axis
 */
RGraph.Drawing.YAxis = function (conf) {

    /**
     * Allow for object config style
     */
    if (typeof conf === 'object'
        && typeof conf.x === 'number'
        && typeof conf.id === 'string') {

        var id = conf.id
        var x = conf.x;

        var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)

    } else {

        var id = conf;
        var x = arguments[1];
    }

    this.id = id;
    this.canvas = document.getElementById(this.id);
    this.context = this.canvas.getContext("2d");
    this.canvas.__object__ = this;
    this.x = x;
    this.coords = [];
    this.coordsText = [];
    this.original_colors = [];
    this.maxLabelLength = 0;
    this.firstDraw = true; // After the first draw this will be false


    /**
     * This defines the type of this shape
     */
    this.type = 'drawing.yaxis';


    /**
     * This facilitates easy object identification, and should always be true
     */
    this.isRGraph = true;


    /**
     * This adds a uid to the object that you can use for identification purposes
     */
    this.uid = RGraph.CreateUID();


    /**
     * This adds a UID to the canvas for identification purposes
     */
    this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();


    /**
     * Some example background properties
     */
    this.properties =
    {
        'chart.gutter.top': 25,
        'chart.gutter.bottom': 25,
        'chart.min': 0,
        'chart.max': null,
        'chart.colors': ['black'],
        'chart.title': '',
        'chart.title.color': null,
        'chart.text.color': null,
        'chart.numticks': 5,
        'chart.numlabels': 5,
        'chart.labels.specific': null,
        'chart.text.font': 'Arial',
        'chart.text.size': 10,
        'chart.align': 'left',
        'hart.scale.formatter': null,
        'chart.scale.point': '.',
        'chart.scale.decimals': 0,
        'chart.scale.invert': false,
        'chart.scale.zerostart': true,
        'chart.scale.visible': true,
        'chart.units.pre': '',
        'chart.units.post': '',
        'chart.linewidth': 1,
        'chart.noendtick.top': false,
        'chart.noendtick.bottom': false,
        'chart.noyaxis': false,
        'chart.tooltips': null,
        'chart.tooltips.effect': 'fade',
        'chart.tooltips.css.class': 'RGraph_tooltip',
        'chart.tooltips.event': 'onclick',
        'chart.xaxispos': 'bottom',
        'chart.events.click': null,
        'chart.events.mousemove': null
    }


    /**
     * A simple check that the browser has canvas support
     */
    if (!this.canvas) {
        alert('[DRAWING.YAXIS] No canvas support');
        return;
    }

    /**
     * Create the dollar object so that functions can be added to them
     */
    this.$0 = {};


    /**
     * Translate half a pixel for antialiasing purposes - but only if it hasn't beeen
     * done already
     *
     * ** Could use setTransform() here instead ?
     */
    if (!this.canvas.__rgraph_aa_translated__) {
        this.context.translate(0.5, 0.5);

        this.canvas.__rgraph_aa_translated__ = true;
    }


    // Short variable names
    var RG = RGraph;
    var ca = this.canvas;
    var co = this.context;
    var prop = this.properties;
    var jq = jQuery;
    var pa = RG.Path;
    var win = window;
    var doc = document;
    var ma = Math;


    /**
     * "Decorate" the object with the generic effects if the effects library has been included
     */
    if (RG.Effects && typeof RG.Effects.decorate === 'function') {
        RG.Effects.decorate(this);
    }


    /**
     * A setter method for setting graph properties. It can be used like this: obj.Set('chart.strokestyle', '#666');
     *
     * @param name  string The name of the property to set
     * @param value mixed  The value of the property
     */
    this.set =
        this.Set = function (name) {
            var value = typeof arguments[1] === 'undefined' ? null : arguments[1];

            /**
             * the number of arguments is only one and it's an
             * object - parse it for configuration data and return.
             */
            if (arguments.length === 1 && typeof name === 'object') {
                RG.parseObjectStyleConfig(this, name);
                return this;
            }


            name = name.toLowerCase();

            /**
             * This should be done first - prepend the property name with "chart." if necessary
             */
            if (name.substr(0, 6) != 'chart.') {
                name = 'chart.' + name;
            }

            prop[name] = value;

            return this;
        };


    /**
     * A getter method for retrieving graph properties. It can be used like this: obj.Get('chart.strokestyle');
     *
     * @param name  string The name of the property to get
     */
    this.get =
        this.Get = function (name) {
            /**
             * This should be done first - prepend the property name with "chart." if necessary
             */
            if (name.substr(0, 6) != 'chart.') {
                name = 'chart.' + name;
            }

            return prop[name.toLowerCase()];
        };


    /**
     * Draws the axes
     */
    this.draw =
        this.Draw = function () {
            /**
             * Fire the onbeforedraw event
             */
            RG.FireCustomEvent(this, 'onbeforedraw');

            /**
             * Some defaults
             */
            this.gutterTop = prop['chart.gutter.top'];
            this.gutterBottom = prop['chart.gutter.bottom'];


            /**
             * Stop this growing uncntrollably
             */
            this.coordsText = [];


            if (!prop['chart.text.color'])  prop['chart.text.color'] = prop['chart.colors'][0];
            if (!prop['chart.title.color']) prop['chart.title.color'] = prop['chart.colors'][0];

            /**
             * Parse the colors. This allows for simple gradient syntax
             */
            if (!this.colorsParsed) {

                this.parseColors();

                // Don't want to do this again
                this.colorsParsed = true;
            }


            // DRAW Y AXIS HERE
            this.DrawYAxis();


            /**
             * This installs the event listeners
             */
            RG.InstallEventListeners(this);


            /**
             * Fire the onfirstdraw event
             */
            if (this.firstDraw) {
                RG.fireCustomEvent(this, 'onfirstdraw');
                this.firstDraw = false;
                this.firstDrawFunc();
            }


            /**
             * Fire the ondraw event
             */
            RG.FireCustomEvent(this, 'ondraw');

            return this;
        };


    /**
     * The getObjectByXY() worker method
     */
    this.getObjectByXY = function (e) {
        if (this.getShape(e)) {
            return this;
        }
    };


    /**
     * Not used by the class during creating the axis, but is used by event handlers
     * to get the coordinates (if any) of the selected shape
     *
     * @param object e The event object
     */
    this.getShape = function (e) {
        var mouseXY = RG.getMouseXY(e);
        var mouseX = mouseXY[0];
        var mouseY = mouseXY[1];

        if (mouseX >= this.x - (prop['chart.align'] == 'right' ? 0 : this.getWidth())
            && mouseX <= this.x + (prop['chart.align'] == 'right' ? this.getWidth() : 0)
            && mouseY >= this.gutterTop
            && mouseY <= (ca.height - this.gutterBottom)
        ) {

            var x = this.x;
            var y = this.gutterTop;
            var w = 15;
            ;
            var h = ca.height - this.gutterTop - this.gutterBottom;

            return {
                0: this, 1: x, 2: y, 3: w, 4: h, 5: 0,
                'object': this, 'x': x, 'y': y, 'width': w, 'height': h, 'index': 0, 'tooltip': prop['chart.tooltips'] ? prop['chart.tooltips'][0] : null
            };
        }

        return null;
    };


    /**
     * This function positions a tooltip when it is displayed
     *
     * @param obj object    The chart object
     * @param int x         The X coordinate specified for the tooltip
     * @param int y         The Y coordinate specified for the tooltip
     * @param objec tooltip The tooltips DIV element
     */
    this.positionTooltip = function (obj, x, y, tooltip, idx) {
        // If there's multiple charts on the canvas they leave unknown font settings
        co.font = prop['chart.text.size'] + ' ' + prop['chart.text.font'];

        var coordW = co.measureText(prop['chart.max'].toFixed(prop['chart.scale.decimals'])).width;
        var coordX = obj.x - coordW;
        var coordY = obj.gutterTop;
        var coordH = ca.height - obj.gutterTop - obj.gutterBottom;
        var canvasXY = RG.getCanvasXY(ca);

        var width = tooltip.offsetWidth;
        var height = tooltip.offsetHeight;

        // Set the top position
        tooltip.style.left = 0;
        tooltip.style.top = canvasXY[1] + ((ca.height - this.gutterTop - this.gutterBottom) / 2) + 'px';

        // By default any overflow is hidden
        tooltip.style.overflow = '';

        // The arrow
        var img = new Image();
        img.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAFCAYAAACjKgd3AAAARUlEQVQYV2NkQAN79+797+RkhC4M5+/bd47B2dmZEVkBCgcmgcsgbAaA9GA1BCSBbhAuA/AagmwQPgMIGgIzCD0M0AMMAEFVIAa6UQgcAAAAAElFTkSuQmCC';
        img.style.position = 'absolute';
        img.id = '__rgraph_tooltip_pointer__';
        img.style.top = (tooltip.offsetHeight - 2) + 'px';
        tooltip.appendChild(img);

        // Reposition the tooltip if at the edges:

        // LEFT edge
        if ((canvasXY[0] + coordX + (coordW / 2) - (width / 2)) < 10) {
            tooltip.style.left = prop['chart.align'] == 'right' ? canvasXY[0] + obj.x - (width * 0.1) + (coordW / 2) + 'px'
                : (canvasXY[0] + coordX - (width * 0.1)) + (coordW / 2) + 'px';
            img.style.left = (width * 0.1) - 8.5 + 'px';

            // RIGHT edge
        } else if ((canvasXY[0] + coordX + (width / 2)) > document.body.offsetWidth) {
            tooltip.style.left = prop['chart.align'] == 'right' ? canvasXY[0] + obj.x - (width * 0.9) + (coordW / 2) + 'px'
                : canvasXY[0] + coordX - (width * 0.9) + (coordW / 2) + 'px';
            img.style.left = ((width * 0.9) - 8.5) + 'px';

            // Default positioning - CENTERED
        } else {
            tooltip.style.left = prop['chart.align'] == 'right' ? canvasXY[0] + obj.x - (width / 2) + (coordW / 2) + 'px'
                : canvasXY[0] + obj.x - (width / 2) - (coordW / 2) + 'px';
            img.style.left = ((width * 0.5) - 8.5) + 'px';
        }
    };


    /**
     * Each object type has its own Highlight() function which highlights the appropriate shape
     *
     * @param object shape The shape to highlight
     */
    this.highlight =
        this.Highlight = function (shape) {
            // When showing tooltips, this method can be used to highlight the X axis
        };


    /**
     * This allows for easy specification of gradients
     */
    this.parseColors = function () {

        // Save the original colors so that they can be restored when the canvas is reset
        if (this.original_colors.length === 0) {
            this.original_colors['chart.colors'] = RG.array_clone(prop['chart.colors']);
        }


        /**
         * Parse various properties for colors
         */
            //prop['chart.title.color'] = this.parseSingleColorForGradient(prop['chart.title.color']);
            //prop['chart.text.color']  = this.parseSingleColorForGradient(prop['chart.text.color']);
        prop['chart.colors'][0] = this.parseSingleColorForGradient(prop['chart.colors'][0]);
    };


    /**
     * Use this function to reset the object to the post-constructor state. Eg reset colors if
     * need be etc
     */
    this.reset = function () {
    };


    /**
     * This parses a single color value
     */
    this.parseSingleColorForGradient = function (color) {
        if (!color) {
            return color;
        }

        if (typeof color === 'string' && color.match(/^gradient\((.*)\)$/i)) {

            var parts = RegExp.$1.split(':');

            // Create the gradient
            var grad = co.createLinearGradient(0, prop['chart.gutter.top'], 0, ca.height - this.gutterBottom);

            var diff = 1 / (parts.length - 1);

            grad.addColorStop(0, RG.trim(parts[0]));

            for (var j = 1; j < parts.length; ++j) {
                grad.addColorStop(j * diff, RG.trim(parts[j]));
            }
        }

        return grad ? grad : color;
    };


    /**
     * The function that draws the Y axis
     */
    this.drawYAxis =
        this.DrawYAxis = function () {
            /**
             * Allow both axis.xxx and chart.xxx to prevent any confusion that may arise
             */
            for (i in prop) {
                if (typeof(i) == 'string') {
                    var key = i.replace(/^chart\./, 'axis.');

                    prop[key] = prop[i];
                }
            }

            var x = this.x;
            var y = this.gutterTop;
            var height = ca.height - this.gutterBottom - this.gutterTop;
            var min = prop['chart.min'] ? prop['chart.min'] : 0;
            var max = prop['chart.max'];
            var title = prop['chart.title'] ? prop['chart.title'] : '';
            var color = prop['chart.colors'] ? prop['chart.colors'][0] : 'black';
            var title_color = prop['chart.title.color'] ? prop['chart.title.color'] : color;
            var label_color = prop['chart.text.color'] ? prop['chart.text.color'] : color;
            var numticks = typeof(prop['chart.numticks']) == 'number' ? prop['chart.numticks'] : 10;
            var labels_specific = prop['chart.labels.specific'];
            var numlabels = prop['chart.numlabels'] ? prop['chart.numlabels'] : 5;
            var font = prop['chart.text.font'] ? prop['chart.text.font'] : 'Arial';
            var size = prop['chart.text.size'] ? prop['chart.text.size'] : 10;
            var align = typeof(prop['chart.align']) == 'string' ? prop['chart.align'] : 'left';
            var formatter = prop['chart.scale.formatter'];
            var decimals = prop['chart.scale.decimals'];
            var invert = prop['chart.scale.invert'];
            var scale_visible = prop['chart.scale.visible'];
            var units_pre = prop['chart.units.pre'];
            var units_post = prop['chart.units.post'];
            var linewidth = prop['chart.linewidth'] ? prop['chart.linewidth'] : 1;
            var notopendtick = prop['chart.noendtick.top'];
            var nobottomendtick = prop['chart.noendtick.bottom'];
            var noyaxis = prop['chart.noyaxis'];
            var xaxispos = prop['chart.xaxispos'];


            // This fixes missing corner pixels in Chrome
            co.lineWidth = linewidth + 0.001;


            /**
             * Set the color
             */
            co.strokeStyle = color;

            if (!noyaxis) {
                /**
                 * Draw the main vertical line
                 */
                pa(co, ['b', 'm', Math.round(x), y, 'l', Math.round(x), y + height, 's', color]);

                /**
                 * Draw the axes tickmarks
                 */
                if (numticks) {

                    var gap = (xaxispos == 'center' ? height / 2 : height) / numticks;
                    var halfheight = height / 2;

                    co.beginPath();
                    for (var i = (notopendtick ? 1 : 0); i <= (numticks - (nobottomendtick || xaxispos == 'center' ? 1 : 0)); ++i) {
                        pa(co, ['m', align == 'right' ? x + 3 : x - 3, Math.round(y + (gap * i)), 'l', x, Math.round(y + (gap * i))]);
                    }

                    // Draw the bottom halves ticks if the X axis is in the center
                    if (xaxispos == 'center') {
                        for (var i = 1; i <= numticks; ++i) {
                            pa(co, ['m', align == 'right' ? x + 3 : x - 3, Math.round(y + halfheight + (gap * i)), 'l', x, Math.round(y + halfheight + (gap * i))]);
                        }
                    }
                    co.stroke();
                }
            }


            /**
             * Draw the scale for the axes
             */
            co.fillStyle = label_color;
            //co.beginPath();
            var text_len = 0;
            if (scale_visible) {
                if (labels_specific && labels_specific.length) {

                    var text_len = 0;

                    // First - gp through the labels to find the longest
                    for (var i = 0, len = labels_specific.length; i < len; i += 1) {
                        text_len = Math.max(text_len, co.measureText(labels_specific[i]).width);
                    }

                    for (var i = 0, len = labels_specific.length; i < len; ++i) {

                        var gap = (len - 1) > 0 ? (height / (len - 1)) : 0;

                        if (xaxispos == 'center') {
                            gap /= 2;
                        }

                        RG.Text2(this, {
                            'font': font,
                            'size': size,
                            'x': x - (align == 'right' ? -5 : 5),
                            'y': (i * gap) + this.gutterTop,
                            'text': labels_specific[i],
                            'valign': 'center',
                            'halign': align == 'right' ? 'left' : 'right',
                            'tag': 'scale'
                        });

                        /**
                         * Store the max length so that it can be used if necessary to determine
                         * whether the mouse is over the axis.
                         */
                        this.maxLabelLength = ma.max(this.maxLabelLength, co.measureText(labels_specific[i]).width);
                    }

                    if (xaxispos == 'center') {

                        // It's "-2" so that the center label isn't added twice
                        for (var i = (labels_specific.length - 2); i >= 0; --i) {

                            RG.Text2(this, {
                                'font': font,
                                'size': size,
                                'x': x - (align == 'right' ? -5 : 5),
                                'y': ca.height - this.gutterBottom - (i * gap),
                                'text': labels_specific[i],
                                'valign': 'center',
                                'halign': align == 'right' ? 'left' : 'right',
                                'tag': 'scale'
                            });
                        }
                    }

                } else {

                    for (var i = 0; i <= numlabels; ++i) {

                        var original = ((max - min) * ((numlabels - i) / numlabels)) + min;

                        if (original == 0 && prop['chart.scale.zerostart'] == false) {
                            continue;
                        }

                        var text = RG.number_format(this, original.toFixed(decimals), units_pre, units_post);
                        var text = String(typeof(formatter) == 'function' ? formatter(this, original) : text);

                        // text_len is used below for positioning the title
                        var text_len = Math.max(text_len, co.measureText(text).width);
                        this.maxLabelLength = text_len;

                        if (invert) {
                            var y = height - ((height / numlabels) * i);
                        } else {
                            var y = (height / numlabels) * i;
                        }

                        if (prop['chart.xaxispos'] == 'center') {
                            y = y / 2;
                        }

                        // This fixes a bug, Replace this: -,400 with this: -400
                        text = text.replace(/^-,([0-9])/, '-$1');


                        /**
                         * Now - draw the labels
                         */
                        RG.Text2(this, {
                            'font': font,
                            'size': size,
                            'x': x - (align == 'right' ? -5 : 5),
                            'y': y + this.gutterTop,
                            'text': text,
                            'valign': 'center',
                            'halign': align == 'right' ? 'left' : 'right',
                            'tag': 'scale'
                        });


                        /**
                         * Draw the bottom half of the labels if the X axis is in the center
                         */
                        if (prop['chart.xaxispos'] == 'center' && i < numlabels) {
                            RG.Text2(this, {
                                'font': font,
                                'size': size,
                                'x': x - (align == 'right' ? -5 : 5),
                                'y': ca.height - this.gutterBottom - y,
                                'text': '-' + text,
                                'valign': 'center',
                                'halign': align == 'right' ? 'left' : 'right',
                                'tag': 'scale'
                            });
                        }
                    }
                }
            }
            //co.stroke();

            /**
             * Draw the title for the axes
             */
            if (title) {
                co.beginPath();

                co.fillStyle = title_color;
                if (labels_specific) {

                    var width = 0;
                    for (var i = 0, len = labels_specific.length; i < len; i += 1) {
                        width = Math.max(width, co.measureText(labels_specific[i]).width);
                    }

                } else {
                    var width = co.measureText(prop['chart.units.pre'] + prop['chart.max'].toFixed(prop['chart.scale.decimals']) + prop['chart.units.post']).width;
                }


                RG.Text2(this, {
                    'font': font,
                    'size': size + 2,
                    'x': align == 'right' ? x + width + 8 : x - width - 8,
                    'y': height / 2 + this.gutterTop,
                    'text': title,
                    'valign': 'bottom',
                    'halign': 'center',
                    'angle': align == 'right' ? 90 : -90
                });
                co.stroke();
            }
        };


    /**
     * This detemines the maximum text width of either the scale or text
     * labels - whichever is given
     *
     * @return number The maximum text width
     */
    this.getWidth = function () {
        var width = this.maxLabelLength;

        // Add the title width if it's specified
        if (prop['chart.title'] && prop['chart.title'].length) {
            width += (prop['chart.text.size'] * 1.5);
        }

        this.width = width;

        return width;
    };


    /**
     * Using a function to add events makes it easier to facilitate method chaining
     *
     * @param string   type The type of even to add
     * @param function func
     */
    this.on = function (type, func) {
        if (type.substr(0, 2) !== 'on') {
            type = 'on' + type;
        }

        this[type] = func;

        return this;
    };


    /**
     * This function runs once only
     * (put at the end of the file (before any effects))
     */
    this.firstDrawFunc = function () {
    };


    /**
     * Objects are now always registered so that the chart is redrawn if need be.
     */
    RG.Register(this);


    /**
     * This is the 'end' of the constructor so if the first argument
     * contains configuration data - handle that.
     */
    if (parseConfObjectForOptions) {
        RG.parseObjectStyleConfig(this, conf.options);
    }
};
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