// o---------------------------------------------------------------------------o
    // | This file is part of the RGraph package - you can learn more at:          |
    // |                                                                           |
    // |                           https://www.rgraph.net                          |
    // |                                                                           |
    // | RGraph is dual-licensed under the Open Source GPL license. This means     |
    // | that it's free to use for any purpose. The GPL license does have          |
    // | consequences on the license of the software that you include it in,       |
    // | however. If this is not desirable, then there's an inexpensive commercial |
    // | license option available. See the RGraph website for more details.        |
    // 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,isRGraph: true,rgraph:true};
    RGraph.Drawing = RGraph.Drawing || {};

    //
    // The constructor. This function sets up the object.
    //
    RGraph.Drawing.Marker3 = function (conf)
    {
        var id     = conf.id,
            canvas = document.getElementById(id),
            x      = conf.x,
            y      = conf.y,
            radius = conf.radius;

        this.id                = id;
        this.canvas            = document.getElementById(this.id);
        this.context           = this.canvas.getContext('2d')
        this.colorsParsed      = false;
        this.canvas.__object__ = this;
        this.original_colors   = [];
        this.firstDraw         = true; // After the first draw this will be false

        
        // The actual radius is what is used to draw the marker - the other radius is the maximum target radius
        // that the marker grows to
        this.actualRadius = 0;
        
        // This is the alpha value that is used to fade out the pulsing marker
        this.alpha = 1;


        //
        // Store the properties
        //
        this.centerx = x;
        this.centery = y;
        this.radius  = radius;
        


        //
        // This defines the type of this shape
        //
        this.type = 'drawing.marker3';


        //
        // This facilitates easy object identification, and should always be true
        //
        this.isRGraph = true;
        this.isrgraph = true;
        this.rgraph   = 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 =
        {
            marginTop:             35, // Used for clipping
            marginBottom:          35, // Used for clipping
            marginLeft:            35, // Used for clipping
            marginRight:           35, // Used for clipping

            colorsFill:                  RGraph.getColors()[0],

            delay:                       50,

            highlightFill:               'rgba(255,255,255,0.7)',
            highlightFade:               true,

            //tooltips:                   null,
            //tooltipsCssClass:           'RGraph_tooltip',
            //tooltipsCss:                null,
            //tooltipsHighlight:          true,
            //tooltipsEffect:             'slide',
            //tooltipsEvent:              'onclick',
            //tooltipsPersistent:         false,
            //tooltipsFormattedPoint:     '.',
            //tooltipsFormattedThousand:  ',',
            //tooltipsFormattedDecimals:  0,
            //tooltipsFormattedUnitsPre:  '',
            //tooltipsFormattedUnitsPost: '',
            //tooltipsFormattedListType:  'ul',
            //tooltipsFormattedListItems: null,
            //tooltipsPointer:            true,
            //tooltipsPointerOffsetx:     0,
            //tooltipsPointerOffsety:     0,
            //tooltipsPositionStatic:     true,

            textAccessible:              false,
            textAccessibleOverflow:      'visible',
            textAccessiblePointerevents: false,
            text:                        null,

            clearto:                     'transparent',
            
            clip:                        null,
            responsive:                  null,
            events:                      {},
            scale:                      true,
            scaleFactor:                2,
            antialiasTranslate:         false,
            
            style:                      []
        };











        //
        // These are the properties that get scaled up if the
        // scale option is enabled.
        //
        this.properties_scale = [
        
            'marginTop',
            'marginBottom',
            'marginLeft',
            'marginRight'
        ];











        //
        // Add the reverse look-up table  for property names
        // so that property names can be specified in any case.
        //
        this.properties_lowercase_map = [];
        for (var i in this.properties) {
            if (typeof i === 'string') {
                this.properties_lowercase_map[i.toLowerCase()] = i;
            }
        }

        //
        // A simple check that the browser has canvas support
        //
        if (!this.canvas) {
            alert('[DRAWING.MARKER3] No canvas support');
            return;
        }
        
        //
        // These are used to store coords
        //
        this.coords     = [];
        this.coordsText = [];


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




        // Easy access to  properties and the path function
        var properties = this.properties;
        this.path      = RGraph.pathObjectFunction;
        
        
        
        //
        // "Decorate" the object with the generic effects if the effects library has been included
        //
        if (RGraph.Effects && typeof RGraph.Effects.decorate === 'function') {
            RGraph.Effects.decorate(this);
        }




        //
        // A setter method for setting graph properties. It can be used like this: obj.set('colorsStroke', '#666');
        // 

        // @param name  string The name of the property to set OR it can be a map
        //                     of name/value settings like what you set in the constructor
        //
        this.set = function (name)
        {
            var value = typeof arguments[1] === 'undefined' ? null : arguments[1];

            // Go through all of the properties and make sure
            // that they're using the correct capitalisation
            if (typeof name === 'string') {
                name = this.properties_lowercase_map[name.toLowerCase()] || name;
            }

            // Set the colorsParsed flag to false if the colors
            // property is being set
            if (   name === 'highlightFill'
                || name === 'colorsFill'
               ) {
                this.colorsParsed = false;
            }

            // the number of arguments is only one and it's an
            // object - parse it for configuration data and return.
            if (arguments.length === 1 && typeof arguments[0] === 'object') {
                for (i in arguments[0]) {
                    if (typeof i === 'string') {
                        this.set(i, arguments[0][i]);
                    }
                }

                return this;
            }

            properties[name] = value;

            return this;
        };








        //
        // A getter method for retrieving graph properties. It can be used like this: obj.get('colorsStroke');
        // 
        // @param name  string The name of the property to get
        //
        this.get = function (name)
        {
            // Go through all of the properties and make sure
            // that they're using the correct capitalisation
            name = this.properties_lowercase_map[name.toLowerCase()] || name;

            return properties[name];
        };








        //
        // Draws the marker
        //
        this.draw = function ()
        {
            var scaleFactor = RGraph.getScaleFactor(this);
            
            // MUST be the first thing that's done - but only
            // once!!
            RGraph.runOnce(`scale-up-the-canvas-once-in-the-draw-function-${this.id}-${this.uid}`,  () =>
            {
                // Note that were in an arrow function so the
                // 'this' variable is OK to be used and refers
                // to the RGraph Line chart object.
                RGraph.scale(this);
                
                // If scaling is enabled then double the radius
                this.radius *= scaleFactor;
            });












            //
            // Fire the beforedraw event
            //
            RGraph.fireCustomEvent(this, 'onbeforedraw');



            //
            // Add any CSS that has been specified to the document.
            // This is general CSS and does not necessarily have to
            // pertain to the canvas tag. It only gets added once
            // to the document no matter how many times this draw
            // function is called.
            //
            // Add the CSS to a <style> block in the <head>.
            RGraph.addConfigurationBasedCSS(this);




            //
            // Install clipping
            //
            // MUST be the first thing that's done after the
            // beforedraw event
            //
            if (!RGraph.isNullish(this.properties.clip)) {
                RGraph.clipTo.start(this, this.properties.clip);
            }








            // Translate half a pixel for antialiasing purposes - but
            // only if it hasn't been done already
            //
            // The old style antialias fix
            //
            if (   !this.properties.scale
                && this.properties.antialiasTranslate
                && !this.canvas.__rgraph_aa_translated__) {

                this.context.translate(0.5,0.5);
            
                this.canvas.__rgraph_aa_translated__ = true;
            }



            // Draw a circle to start with
            this.context.globalAlpha = this.alpha;
            this.path(
                'b a % % % % % % a % % % % % % f %',
                this.centerx, this.centery, this.actualRadius, 0, 2 * Math.PI,false,
                this.centerx, this.centery, Math.max(this.actualRadius - (scaleFactor * 8), 0), 2 * Math.PI,0, true,
                properties.colorsFill
            );
            
            this.alpha     = this.actualRadius ? 1 - ( (this.actualRadius * 0.75) / this.radius) : 1;
            this.context.globalAlpha = 1;
            
            
            if (this.actualRadius < this.radius) {
                this.actualRadius += 2;
            } else if (this.actualRadius >= this.radius) {
                this.actualRadius = 0;
                this.alpha = 1;
            }

            if (!this.TIMER) {

                var obj = this;
                
                setInterval(function ()
                {
                    RGraph.redrawCanvas(obj.canvas);
                }, properties.delay / scaleFactor);
                
                this.TIMER = true;
            }




            //
            // Add custom text thats specified
            //
            RGraph.addCustomText(this);








            //
            // This installs the event listeners
            //
            RGraph.installEventListeners(this);
    


            //
            // End clipping
            //
            if (!RGraph.isNullish(this.properties.clip)) {
                RGraph.clipTo.end();
            }



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




            //
            // Fire the draw event
            //
            RGraph.fireCustomEvent(this, 'ondraw');
            
            return this;
        };








        //
        // Used in chaining. Runs a function there and then - not waiting for
        // the events to fire (eg the onbeforedraw event)
        // 
        // @param function func The function to execute
        //
        this.exec = function (func)
        {
            func(this);
            
            return this;
        };








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








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

            if (
                    RGraph.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]) <= this.radius
                 && (this.properties.clip ? RGraph.clipTo.test(this, mouseX, mouseY) : true)
               ) {

                if (RGraph.parseTooltipText && properties.tooltips) {
                    var tooltip = RGraph.parseTooltipText(properties.tooltips, 0);
                }

                return {
                    object: this,
                         x: this.centerx,
                         y: this.centery,
                    radius: this.radius,
                   dataset: 0,
                     index: 0,
           sequentialIndex: 0,
                   tooltip: typeof tooltip === 'string' ? tooltip : null
                };
            }
            
            return null;
        };








        //
        // Each object type has its own Highlight() function which highlights the appropriate shape
        // 
        // @param object shape The shape to highlight
        //
        this.highlight = function (shape)
        {
            // If the highlightFade property is not set then call
            // the highlight function multiple times when the
            // globalAlpha is set at varying levels of transparency
            // to fade the highlight in. If the variable is set,
            // however, then this call is probably a part of said
            // highlighting process so don't call ourselves
            // again - just highlight the chart.
            if (this.properties.highlightFade && !this.highlight.highlighting) {
            
                // Add a variable to the highlight function (this
                // function) to indicate that we're currently in
                // the process of highlighting.
                this.highlight.highlighting = true;
                
                var obj = this;
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 20);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 40);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 60);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 80);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 100);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 120);
                setTimeout(function() {obj.context.globalAlpha = 0.2; obj.highlight(shape); obj.context.globalAlpha = 1;}, 140);
                setTimeout(function() {obj.highlight.highlighting = false;}, 400);
            
                return;
            }

            RGraph.clipTo.callback(this, function (obj)
            {
                if (typeof obj.properties.highlightStyle === 'function') {
                    (obj.properties.highlightStyle)(shape);
                } else {
                    obj.path(
                        'b r % % % % f % s %',
                        obj.coords[0][0],obj.coords[0][1],obj.coords[0][2],obj.coords[0][3],
                        obj.properties.highlightFill, obj.properties.highlightStroke
                    );
                }
            }); // End of clipping callback.
        };








        //
        // 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.colorsFill      = RGraph.arrayClone(properties.colorsFill);
                this.original_colors.highlightFill   = RGraph.arrayClone(properties.highlightFill);
            }


            //
            // Parse various properties for colors
            //
            properties.colorsFill    = this.parseSingleColorForGradient(properties.colorsFill);
            properties.highlightFill = this.parseSingleColorForGradient(properties.highlightFill);
        };








        //
        // 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)) {


                // Allow for JSON gradients
                if (color.match(/^gradient\(({.*})\)$/i)) {
                    return RGraph.parseJSONGradient({object: this, def: RegExp.$1});
                }

                // Create the gradient
                var parts = RegExp.$1.split(':'),
                    grad  = this.context.createRadialGradient(this.centerx, this.centery, 0, this.centerx, this.centery, this.radius),
                    diff  = 1 / (parts.length - 1);
    
                //grad.addColorStop(0, RGraph.trim(parts[0]));
    
                for (var j=0; j<parts.length; j+=1) {
                    grad.addColorStop(j * diff, RGraph.trim(parts[j]));
                }
            }
    
            return grad ? grad : color;
        };








        //
        // 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;
            }
            
            if (typeof this[type] !== 'function') {
                this[type] = func;
            } else {
                RGraph.addCustomEventListener(this, type, func);
            }
    
            return this;
        };








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








        //
        // A worker function that handles Bar chart specific tooltip substitutions
        //
        this.tooltipSubstitutions = function (opt)
        {
            return {
                  index: 0,
                dataset: 0,
        sequentialIndex: 0,
                  value: null
            };
        };








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








        //
        // the number of arguments is only one and it's an
        // object - parse it for configuration data and return.
        //
        RGraph.parseObjectStyleConfig(this, conf.options);
    };