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/** * 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 RGraph license. For all kinds of business \| * \| purposes there is a small one-time licensing fee to pay and for non \| * \| commercial purposes it is free to use. You can read the full license here: \| * \| \| * \| http://www.rgraph.net/LICENSE.txt \| * o------------------------------------------------------------------------------o / if (typeof(RGraph) == 'undefined') RGraph = {}; /* * The scatter graph constructor * * @param object canvas The cxanvas object * @param array data The chart data / RGraph.Scatter = function (id, data) { // Get the canvas and context objects this.id = id; this.canvas = document.getElementById(id); this.canvas.__object__ = this; this.context = this.canvas.getContext ? this.canvas.getContext("2d") : null; this.max = 0; this.coords = []; this.data = []; this.type = 'scatter'; this.isRGraph = true; /* * Compatibility with older browsers / RGraph.OldBrowserCompat(this.context); // Various config properties this.properties = { 'chart.background.barcolor1': 'white', 'chart.background.barcolor2': 'white', 'chart.background.grid': true, 'chart.background.grid.width': 1, 'chart.background.grid.color': '#ddd', 'chart.background.grid.hsize': 20, 'chart.background.grid.vsize': 20, 'chart.background.hbars': null, 'chart.background.vbars': null, 'chart.background.grid.vlines': true, 'chart.background.grid.hlines': true, 'chart.background.grid.border': true, 'chart.background.grid.autofit':false, 'chart.background.grid.autofit.numhlines': 7, 'chart.background.grid.autofit.numvlines': 20, 'chart.text.size': 10, 'chart.text.angle': 0, 'chart.text.color': 'black', 'chart.text.font': 'Verdana', 'chart.tooltips.effect': 'fade', 'chart.tooltips.hotspot': 3, 'chart.tooltips.css.class': 'RGraph_tooltip', 'chart.tooltips.highlight': true, 'chart.tooltips.coords.adjust': [0,0], 'chart.units.pre': '', 'chart.units.post': '', 'chart.tickmarks': 'cross', 'chart.ticksize': 5, 'chart.xticks': true, 'chart.xaxis': true, 'chart.gutter': 25, 'chart.xmax': 0, 'chart.ymax': null, 'chart.ymin': null, 'chart.scale.decimals': null, 'chart.scale.point': '.', 'chart.scale.thousand': ',', 'chart.title': '', 'chart.title.background': null, 'chart.title.hpos': null, 'chart.title.vpos': null, 'chart.title.xaxis': '', 'chart.title.yaxis': '', 'chart.title.xaxis.pos': 0.25, 'chart.title.yaxis.pos': 0.25, 'chart.labels': [], 'chart.ylabels': true, 'chart.ylabels.count': 5, 'chart.contextmenu': null, 'chart.defaultcolor': 'black', 'chart.xaxispos': 'bottom', 'chart.yaxispos': 'left', 'chart.noendxtick': false, 'chart.crosshairs': false, 'chart.crosshairs.color': '#333', 'chart.crosshairs.linewidth': 1, 'chart.crosshairs.coords': false, 'chart.crosshairs.coords.fixed':true, 'chart.crosshairs.coords.fadeout':false, 'chart.crosshairs.coords.labels.x': 'X', 'chart.crosshairs.coords.labels.y': 'Y', 'chart.annotatable': false, 'chart.annotate.color': 'black', 'chart.line': false, 'chart.line.linewidth': 1, 'chart.line.colors': ['green', 'red'], 'chart.line.shadow.color': 'rgba(0,0,0,0)', 'chart.line.shadow.blur': 2, 'chart.line.shadow.offsetx': 3, 'chart.line.shadow.offsety': 3, 'chart.line.stepped': false, 'chart.noaxes': false, 'chart.key': [], 'chart.key.background': 'white', 'chart.key.position': 'graph', 'chart.key.shadow': false, 'chart.key.shadow.color': '#666', 'chart.key.shadow.blur': 3, 'chart.key.shadow.offsetx': 2, 'chart.key.shadow.offsety': 2, 'chart.key.position.gutter.boxed': true, 'chart.key.position.x': null, 'chart.key.position.y': null, 'chart.key.color.shape': 'square', 'chart.key.rounded': true, 'chart.axis.color': 'black', 'chart.zoom.factor': 1.5, 'chart.zoom.fade.in': true, 'chart.zoom.fade.out': true, 'chart.zoom.hdir': 'right', 'chart.zoom.vdir': 'down', 'chart.zoom.frames': 10, 'chart.zoom.delay': 50, 'chart.zoom.shadow': true, 'chart.zoom.mode': 'canvas', 'chart.zoom.thumbnail.width': 75, 'chart.zoom.thumbnail.height': 75, 'chart.zoom.background': true, 'chart.zoom.action': 'zoom', 'chart.boxplot.width': 8, 'chart.resizable': false, 'chart.xmin': 0 } // Handle multiple datasets being given as one argument if (arguments[1][0] && arguments[1][0][0] && typeof(arguments[1][0][0][0]) == 'number') { // Store the data set(s) for (var i=0; i<arguments[1].length; ++i) { this.data[i] = arguments[1][i]; } // Handle multiple data sets being supplied as seperate arguments } else { // Store the data set(s) for (var i=1; i<arguments.length; ++i) { this.data[i - 1] = arguments[i]; } } // Check for support if (!this.canvas) { alert('[SCATTER] No canvas support'); return; } // Check the common library has been included if (typeof(RGraph) == 'undefined') { alert('[SCATTER] Fatal error: The common library does not appear to have been included'); } } /* * A simple setter * * @param string name The name of the property to set * @param string value The value of the property / RGraph.Scatter.prototype.Set = function (name, value) { /* * This is here because the key expects a name of "chart.colors" / if (name == 'chart.line.colors') { this.properties['chart.colors'] = value; } /* * Allow compatibility with older property names / if (name == 'chart.tooltip.hotspot') { name = 'chart.tooltips.hotspot'; } /* * chart.yaxispos should be left or right / if (name == 'chart.yaxispos' && value != 'left' && value != 'right') { alert("[SCATTER] chart.yaxispos should be left or right. You've set it to: '" + value + "' Changing it to left"); value = 'left'; } this.properties[name.toLowerCase()] = value; } /* * A simple getter * * @param string name The name of the property to set / RGraph.Scatter.prototype.Get = function (name) { return this.properties[name]; } /* * The function you call to draw the line chart / RGraph.Scatter.prototype.Draw = function () { /* * Fire the onbeforedraw event / RGraph.FireCustomEvent(this, 'onbeforedraw'); /* * Clear all of this canvases event handlers (the ones installed by RGraph) / RGraph.ClearEventListeners(this.id); // Go through all the data points and see if a tooltip has been given this.Set('chart.tooltips', false); this.hasTooltips = false; var overHotspot = false; // Reset the coords array this.coords = []; if (!RGraph.isIE8()) { for (var i=0; i<this.data.length; ++i) { for (var j =0;j<this.data[i].length; ++j) { if (this.data[i][j] && this.data[i][j][3] && typeof(this.data[i][j][3]) == 'string' && this.data[i][j][3].length) { this.Set('chart.tooltips', [1]); // An array this.hasTooltips = true; } } } } // Reset the maximum value this.max = 0; // Work out the maximum Y value if (this.Get('chart.ymax') && this.Get('chart.ymax') > 0) { this.scale = []; this.max = this.Get('chart.ymax'); this.min = this.Get('chart.ymin') ? this.Get('chart.ymin') : 0; this.scale[0] = ((this.max - this.min) (1/5)) + this.min; this.scale[1] = ((this.max - this.min) * (2/5)) + this.min; this.scale[2] = ((this.max - this.min) * (3/5)) + this.min; this.scale[3] = ((this.max - this.min) * (4/5)) + this.min; this.scale[4] = ((this.max - this.min) * (5/5)) + this.min; var decimals = this.Get('chart.scale.decimals'); this.scale = [ Number(this.scale[0]).toFixed(decimals), Number(this.scale[1]).toFixed(decimals), Number(this.scale[2]).toFixed(decimals), Number(this.scale[3]).toFixed(decimals), Number(this.scale[4]).toFixed(decimals) ]; } else { var i = 0; var j = 0; for (i=0; i<this.data.length; ++i) { for (j=0; j<this.data[i].length; ++j) { this.max = Math.max(this.max, typeof(this.data[i][j][1]) == 'object' ? RGraph.array_max(this.data[i][j][1]) : Math.abs(this.data[i][j][1])); } } this.scale = RGraph.getScale(this.max, this); this.max = this.scale[4]; this.min = this.Get('chart.ymin') ? this.Get('chart.ymin') : 0; if (this.min) { this.scale[0] = ((this.max - this.min) * (1/5)) + this.min; this.scale[1] = ((this.max - this.min) * (2/5)) + this.min; this.scale[2] = ((this.max - this.min) * (3/5)) + this.min; this.scale[3] = ((this.max - this.min) * (4/5)) + this.min; this.scale[4] = ((this.max - this.min) * (5/5)) + this.min; } if (typeof(this.Get('chart.scale.decimals')) == 'number') { var decimals = this.Get('chart.scale.decimals'); this.scale = [ Number(this.scale[0]).toFixed(decimals), Number(this.scale[1]).toFixed(decimals), Number(this.scale[2]).toFixed(decimals), Number(this.scale[3]).toFixed(decimals), Number(this.scale[4]).toFixed(decimals) ]; } } this.grapharea = this.canvas.height - (2 * this.Get('chart.gutter')); // Progressively Draw the chart RGraph.background.Draw(this); /** * Draw any horizontal bars that have been specified / if (this.Get('chart.background.hbars') && this.Get('chart.background.hbars').length) { RGraph.DrawBars(this); } /* * Draw any vertical bars that have been specified / if (this.Get('chart.background.vbars') && this.Get('chart.background.vbars').length) { this.DrawVBars(); } if (!this.Get('chart.noaxes')) { this.DrawAxes(); } this.DrawLabels(); i = 0; for(i=0; i<this.data.length; ++i) { this.DrawMarks(i); // Set the shadow this.context.shadowColor = this.Get('chart.line.shadow.color'); this.context.shadowOffsetX = this.Get('chart.line.shadow.offsetx'); this.context.shadowOffsetY = this.Get('chart.line.shadow.offsety'); this.context.shadowBlur = this.Get('chart.line.shadow.blur'); this.DrawLine(i); // Turn the shadow off RGraph.NoShadow(this); } if (this.Get('chart.line')) { for (var i=0;i<this.data.length; ++i) { this.DrawMarks(i); // Call this again so the tickmarks appear over the line } } /* * Setup the context menu if required / if (this.Get('chart.contextmenu')) { RGraph.ShowContext(this); } /* * Install the event handler for tooltips / if (this.hasTooltips) { /* * Register all charts / RGraph.Register(this); var overHotspot = false; var canvas_onmousemove_func = function (e) { e = RGraph.FixEventObject(e); var canvas = e.target; var obj = canvas.__object__; var context = canvas.getContext('2d'); var mouseCoords = RGraph.getMouseXY(e); var overHotspot = false; /* * Now loop through each point comparing the coords / var offset = obj.Get('chart.tooltips.hotspot'); // This is how far the hotspot extends for (var set=0; set<obj.coords.length; ++set) { for (var i=0; i<obj.coords[set].length; ++i) { var adjust = obj.Get('chart.tooltips.coords.adjust'); var xCoord = obj.coords[set][i][0] + adjust[0]; var yCoord = obj.coords[set][i][1] + adjust[1]; var tooltip = obj.coords[set][i][2]; if (mouseCoords[0] <= (xCoord + offset) && mouseCoords[0] >= (xCoord - offset) && mouseCoords[1] <= (yCoord + offset) && mouseCoords[1] >= (yCoord - offset) && tooltip && tooltip.length > 0) { overHotspot = true; canvas.style.cursor = 'pointer'; if ( !RGraph.Registry.Get('chart.tooltip') \|\| RGraph.Registry.Get('chart.tooltip').__text__ != tooltip \|\| RGraph.Registry.Get('chart.tooltip').__index__ != i \|\| RGraph.Registry.Get('chart.tooltip').__dataset__ != set ) { if (obj.Get('chart.tooltips.highlight')) { RGraph.Redraw(); } /* * Get the tooltip text / if (typeof(tooltip) == 'function') { var text = String(tooltip(i)); } else { var text = String(tooltip); } RGraph.Tooltip(canvas, text, e.pageX, e.pageY, i); RGraph.Registry.Get('chart.tooltip').__dataset__ = set; /* * Draw a circle around the mark / if (obj.Get('chart.tooltips.highlight')) { context.beginPath(); context.fillStyle = 'rgba(255,255,255,0.5)'; context.arc(xCoord, yCoord, 3, 0, 6.28, 0); context.fill(); } } } } } /* * Reset the pointer / if (!overHotspot) { canvas.style.cursor = 'default'; } } this.canvas.addEventListener('mousemove', canvas_onmousemove_func, false); RGraph.AddEventListener(this.id, 'mousemove', canvas_onmousemove_func); } /* * Draw the key if necessary / if (this.Get('chart.key') && this.Get('chart.key').length) { RGraph.DrawKey(this, this.Get('chart.key'), this.Get('chart.line.colors')); } /* * Draw crosschairs / RGraph.DrawCrosshairs(this); /* * If the canvas is annotatable, do install the event handlers / if (this.Get('chart.annotatable')) { RGraph.Annotate(this); } /* * This bit shows the mini zoom window if requested / if (this.Get('chart.zoom.mode') == 'thumbnail' \|\| this.Get('chart.zoom.mode') == 'area') { RGraph.ShowZoomWindow(this); } /* * This function enables resizing / if (this.Get('chart.resizable')) { RGraph.AllowResizing(this); } /* * Fire the RGraph ondraw event / RGraph.FireCustomEvent(this, 'ondraw'); } /* * Draws the axes of the scatter graph / RGraph.Scatter.prototype.DrawAxes = function () { var canvas = this.canvas; var context = this.context; var graphHeight = this.canvas.height - (this.Get('chart.gutter') 2); var gutter = this.Get('chart.gutter'); context.beginPath(); context.strokeStyle = this.Get('chart.axis.color'); context.lineWidth = 1; // Draw the Y axis if (this.Get('chart.yaxispos') == 'left') { context.moveTo(gutter, gutter); context.lineTo(gutter, this.canvas.height - gutter); } else { context.moveTo(canvas.width - gutter, gutter); context.lineTo(canvas.width - gutter, canvas.height - gutter); } // Draw the X axis if (this.Get('chart.xaxis')) { if (this.Get('chart.xaxispos') == 'center') { context.moveTo(gutter, canvas.height / 2); context.lineTo(canvas.width - gutter, canvas.height / 2); } else { context.moveTo(gutter, canvas.height - gutter); context.lineTo(canvas.width - gutter, canvas.height - gutter); } } /** * Draw the Y tickmarks / for (y=gutter; y < canvas.height - gutter + (this.Get('chart.xaxispos') == 'center' ? 1 : 0) ; y+=(graphHeight / 5) / 2) { // This is here to accomodate the X axis being at the center if (y == (canvas.height / 2) ) continue; if (this.Get('chart.yaxispos') == 'left') { context.moveTo(gutter, y); context.lineTo(gutter - 3, y); } else { context.moveTo(canvas.width - gutter +3, y); context.lineTo(canvas.width - gutter, y); } } /* * Draw the X tickmarks / if (this.Get('chart.xticks') && this.Get('chart.xaxis')) { var x = 0; var y = (this.Get('chart.xaxispos') == 'center') ? (this.canvas.height / 2) : (this.canvas.height - gutter); this.xTickGap = (this.canvas.width - (2 gutter) ) / this.Get('chart.labels').length; for (x = (gutter + (this.Get('chart.yaxispos') == 'left' ? this.xTickGap / 2 : 0) ); x<=(canvas.width - gutter - (this.Get('chart.yaxispos') == 'left' ? 0 : 1)); x += this.xTickGap / 2) { if (this.Get('chart.yaxispos') == 'left' && this.Get('chart.noendxtick') == true && x == (canvas.width - gutter) ) { continue; } else if (this.Get('chart.yaxispos') == 'right' && this.Get('chart.noendxtick') == true && x == gutter) { continue; } context.moveTo(x, y - (this.Get('chart.xaxispos') == 'center' ? 3 : 0)); context.lineTo(x, y + 3); } } context.stroke(); } /** * Draws the labels on the scatter graph / RGraph.Scatter.prototype.DrawLabels = function () { this.context.fillStyle = this.Get('chart.text.color'); var font = this.Get('chart.text.font'); var xMin = this.Get('chart.xmin'); var xMax = this.Get('chart.xmax'); var yMax = this.scale[4]; var gutter = this.Get('chart.gutter'); var text_size = this.Get('chart.text.size'); var units_pre = this.Get('chart.units.pre'); var units_post = this.Get('chart.units.post'); var numYLabels = this.Get('chart.ylabels.count'); var context = this.context; var canvas = this.canvas; this.halfTextHeight = text_size / 2; this.halfGraphHeight = (this.canvas.height - (2 this.Get('chart.gutter'))) / 2; /** * Draw the Y yaxis labels, be it at the top or center / if (this.Get('chart.ylabels')) { var xPos = this.Get('chart.yaxispos') == 'left' ? gutter - 5 : canvas.width - gutter + 5; var align = this.Get('chart.yaxispos') == 'right' ? 'left' : 'right'; if (this.Get('chart.xaxispos') == 'center') { /* * Specific Y labels / if (typeof(this.Get('chart.ylabels.specific')) == 'object') { var labels = this.Get('chart.ylabels.specific'); for (var i=0; i<this.Get('chart.ylabels.specific').length; ++i) { var y = gutter + (i (this.grapharea / (labels.length * 2) ) ); RGraph.Text(context, font, text_size, xPos, y, labels[i], 'center', align); } var reversed_labels = RGraph.array_reverse(labels); for (var i=0; i<reversed_labels.length; ++i) { var y = gutter + (this.grapharea / 2) + ((i+1) * (this.grapharea / (labels.length * 2) ) ); RGraph.Text(context, font, text_size, xPos, y, reversed_labels[i], 'center', align); } return; } if (numYLabels == 1 \|\| numYLabels == 3 \|\| numYLabels == 5) { // Draw the top halves labels RGraph.Text(context, font, text_size, xPos, gutter, RGraph.number_format(this, this.scale[4], units_pre, units_post), 'center', align); if (numYLabels >= 5) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (1/10) ), RGraph.number_format(this, this.scale[3], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (3/10) ), RGraph.number_format(this, this.scale[1], units_pre, units_post), 'center', align); } if (numYLabels >= 3) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (2/10) ), RGraph.number_format(this, this.scale[2], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (4/10) ), RGraph.number_format(this, this.scale[0], units_pre, units_post), 'center', align); } // Draw the bottom halves labels if (numYLabels >= 3) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (1/10) ) + this.halfGraphHeight, '-' + RGraph.number_format(this, this.scale[0], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (3/10) ) + this.halfGraphHeight, '-' + RGraph.number_format(this, this.scale[2], units_pre, units_post), 'center', align); } if (numYLabels == 5) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (2/10) ) + this.halfGraphHeight, '-' + RGraph.number_format(this, this.scale[1], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (4/10) ) + this.halfGraphHeight, '-' + RGraph.number_format(this, this.scale[3], units_pre, units_post), 'center', align); } RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (5/10) ) + this.halfGraphHeight, '-' + RGraph.number_format(this, this.scale[4], units_pre, units_post), 'center', align); } else if (numYLabels == 10) { // 10 Y labels var interval = (this.grapharea / numYLabels) / 2; for (var i=0; i<numYLabels; ++i) { RGraph.Text(context, font, text_size, xPos,gutter + ((canvas.height - (2 * gutter)) * (i/20) ),RGraph.number_format(this, (this.max - (this.max * (i/10))).toFixed(this.Get('chart.scale.decimals')), units_pre, units_post),'center', align); RGraph.Text(context, font, text_size, xPos,gutter + ((canvas.height - (2 * gutter)) * (i/20) ) + (this.grapharea / 2) + (this.grapharea / 20),'-' + RGraph.number_format(this, ((this.max * (i/10)) + (this.max * (1/10))).toFixed((this.Get('chart.scale.decimals'))), units_pre, units_post), 'center', align); } } else { alert('[SCATTER SCALE] Number of Y labels can be 1/3/5/10 only'); } } else { var xPos = this.Get('chart.yaxispos') == 'left' ? gutter - 5 : canvas.width - gutter + 5; var align = this.Get('chart.yaxispos') == 'right' ? 'left' : 'right'; /** * Specific Y labels / if (typeof(this.Get('chart.ylabels.specific')) == 'object') { var labels = this.Get('chart.ylabels.specific'); for (var i=0; i<this.Get('chart.ylabels.specific').length; ++i) { var y = gutter + (i (this.grapharea / labels.length) ); RGraph.Text(context, font, text_size, xPos, y, labels[i], 'center', align); } return; } if (numYLabels == 1 \|\| numYLabels == 3 \|\| numYLabels == 5) { RGraph.Text(context, font, text_size, xPos, gutter, RGraph.number_format(this, this.scale[4], units_pre, units_post), 'center', align); if (numYLabels >= 5) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (1/5) ), RGraph.number_format(this, this.scale[3], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (3/5) ), RGraph.number_format(this, this.scale[1], units_pre, units_post), 'center', align); } if (numYLabels >= 3) { RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (2/5) ), RGraph.number_format(this, this.scale[2], units_pre, units_post), 'center', align); RGraph.Text(context, font, text_size, xPos, gutter + ((canvas.height - (2 * gutter)) * (4/5) ), RGraph.number_format(this, this.scale[0], units_pre, units_post), 'center', align); } } else if (numYLabels == 10) { // 10 Y labels var interval = (this.grapharea / numYLabels) / 2; for (var i=0; i<numYLabels; ++i) { RGraph.Text(context, font, text_size, xPos,gutter + ((canvas.height - (2 * gutter)) * (i/10) ),RGraph.number_format(this,(this.max - (this.max * (i/10))).toFixed((this.Get('chart.scale.decimals'))), units_pre, units_post), 'center', align); } } else { alert('[SCATTER SCALE] Number of Y labels can be 1/3/5/10 only'); } if (this.Get('chart.ymin')) { RGraph.Text(context, font, text_size, xPos, canvas.height - gutter,RGraph.number_format(this, this.Get('chart.ymin').toFixed(this.Get('chart.scale.decimals')), units_pre, units_post),'center', align); } } } // Put the text on the X axis var graphArea = this.canvas.width - (2 * gutter); var xInterval = graphArea / this.Get('chart.labels').length; var xPos = gutter; var yPos = (this.canvas.height - gutter) + 15; var labels = this.Get('chart.labels'); /** * Text angle / var angle = 0; var valign = null; var halign = 'center'; if (this.Get('chart.text.angle') > 0) { angle = -1 this.Get('chart.text.angle'); valign = 'center'; halign = 'right'; yPos -= 10; } for (i=0; i<labels.length; ++i) { if (typeof(labels[i]) == 'object') { RGraph.Text(context, font, this.Get('chart.text.size'), gutter + (graphArea * ((labels[i][1] - xMin) / (this.Get('chart.xmax') - xMin))) + 5, yPos, String(labels[i][0]), valign, angle != 0 ? 'right' : 'left', null, angle); /** * Draw the gray indicator line / this.context.beginPath(); this.context.strokeStyle = '#bbb'; this.context.moveTo(gutter + (graphArea ((labels[i][1] - xMin)/ (this.Get('chart.xmax') - xMin))), this.canvas.height - gutter); this.context.lineTo(gutter + (graphArea * ((labels[i][1] - xMin)/ (this.Get('chart.xmax') - xMin))), this.canvas.height - gutter + 20); this.context.stroke(); } else { RGraph.Text(context, font, this.Get('chart.text.size'), xPos + (this.xTickGap / 2), yPos, String(labels[i]), valign, halign, null, angle); } // Do this for the next time around xPos += xInterval; } } /** * Draws the actual scatter graph marks * * @param i integer The dataset index / RGraph.Scatter.prototype.DrawMarks = function (i) { /* * Reset the coords array / this.coords[i] = []; /* * Plot the values / var xmax = this.Get('chart.xmax'); var default_color = this.Get('chart.defaultcolor'); for (var j=0; j<this.data[i].length; ++j) { /* * This is here because tooltips are optional / var data_point = this.data[i]; var xCoord = data_point[j][0]; var yCoord = data_point[j][1]; var color = data_point[j][2] ? data_point[j][2] : default_color; var tooltip = (data_point[j] && data_point[j][3]) ? data_point[j][3] : null; this.DrawMark( i, xCoord, yCoord, xmax, this.scale[4], color, tooltip, this.coords[i], data_point ); } } /* * Draws a single scatter mark / RGraph.Scatter.prototype.DrawMark = function (index, x, y, xMax, yMax, color, tooltip, coords, data) { var tickmarks = this.Get('chart.tickmarks'); var tickSize = this.Get('chart.ticksize'); var gutter = this.Get('chart.gutter'); var xMin = this.Get('chart.xmin'); var x = ((x - xMin) / (xMax - xMin)) (this.canvas.width - (2 * gutter)); var originalX = x; var originalY = y; /** * This allows chart.tickmarks to be an array / if (tickmarks && typeof(tickmarks) == 'object') { tickmarks = tickmarks[index]; } /* * This allows chart.ticksize to be an array / if (typeof(tickSize) == 'object') { var tickSize = tickSize[index]; var halfTickSize = tickSize / 2; } else { var halfTickSize = tickSize / 2; } /* * This bit is for boxplots only / if ( typeof(y) == 'object' && typeof(y[0]) == 'number' && typeof(y[1]) == 'number' && typeof(y[2]) == 'number' && typeof(y[3]) == 'number' && typeof(y[4]) == 'number' ) { var yMin = this.Get('chart.ymin') ? this.Get('chart.ymin') : 0; this.Set('chart.boxplot', true); this.graphheight = this.canvas.height - (2 gutter); if (this.Get('chart.xaxispos') == 'center') { this.graphheight /= 2; } var y0 = (this.graphheight) - ((y[4] - yMin) / (yMax - yMin)) * (this.graphheight); var y1 = (this.graphheight) - ((y[3] - yMin) / (yMax - yMin)) * (this.graphheight); var y2 = (this.graphheight) - ((y[2] - yMin) / (yMax - yMin)) * (this.graphheight); var y3 = (this.graphheight) - ((y[1] - yMin) / (yMax - yMin)) * (this.graphheight); var y4 = (this.graphheight) - ((y[0] - yMin) / (yMax - yMin)) * (this.graphheight); var col1 = y[5]; var col2 = y[6]; // Override the boxWidth if (typeof(y[7]) == 'number') { var boxWidth = y[7]; } var y = this.graphheight - y2; } else { var yMin = this.Get('chart.ymin') ? this.Get('chart.ymin') : 0; var y = (( (y - yMin) / (yMax - yMin)) * (this.canvas.height - (2 * gutter))); } /** * Account for the X axis being at the centre / if (this.Get('chart.xaxispos') == 'center') { y /= 2; y += this.halfGraphHeight; } // This is so that points are on the graph, and not the gutter x += gutter; y = this.canvas.height - gutter - y; this.context.beginPath(); // Color this.context.strokeStyle = color; /* * Boxplots / if ( this.Get('chart.boxplot') && typeof(y0) == 'number' && typeof(y1) == 'number' && typeof(y2) == 'number' && typeof(y3) == 'number' && typeof(y4) == 'number' ) { var boxWidth = boxWidth ? boxWidth : this.Get('chart.boxplot.width'); var halfBoxWidth = boxWidth / 2; this.context.beginPath(); // Draw the upper coloured box if a value is specified if (col1) { this.context.fillStyle = col1; this.context.fillRect(x - halfBoxWidth, y1 + gutter, boxWidth, y2 - y1); } // Draw the lower coloured box if a value is specified if (col2) { this.context.fillStyle = col2; this.context.fillRect(x - halfBoxWidth, y2 + gutter, boxWidth, y3 - y2); } this.context.strokeRect(x - halfBoxWidth, y1 + gutter, boxWidth, y3 - y1); this.context.stroke(); // Now draw the whiskers this.context.beginPath(); this.context.moveTo(x - halfBoxWidth, y0 + gutter); this.context.lineTo(x + halfBoxWidth, y0 + gutter); this.context.moveTo(x, y0 + gutter); this.context.lineTo(x, y1 + gutter); this.context.moveTo(x - halfBoxWidth, y4 + gutter); this.context.lineTo(x + halfBoxWidth, y4 + gutter); this.context.moveTo(x, y4 + gutter); this.context.lineTo(x, y3 + gutter); this.context.stroke(); } /* * Draw the tickmark, but not for boxplots / if (!y0 && !y1 && !y2 && !y3 && !y4) { this.graphheight = this.canvas.height - (2 gutter); if (tickmarks == 'circle') { this.context.arc(x, y, halfTickSize, 0, 6.28, 0); this.context.fillStyle = color; this.context.fill(); } else if (tickmarks == 'plus') { this.context.moveTo(x, y - halfTickSize); this.context.lineTo(x, y + halfTickSize); this.context.moveTo(x - halfTickSize, y); this.context.lineTo(x + halfTickSize, y); this.context.stroke(); } else if (tickmarks == 'square') { this.context.strokeStyle = color; this.context.fillStyle = color; this.context.fillRect( x - halfTickSize, y - halfTickSize, tickSize, tickSize ); //this.context.fill(); } else if (tickmarks == 'cross') { this.context.moveTo(x - halfTickSize, y - halfTickSize); this.context.lineTo(x + halfTickSize, y + halfTickSize); this.context.moveTo(x + halfTickSize, y - halfTickSize); this.context.lineTo(x - halfTickSize, y + halfTickSize); this.context.stroke(); /** * Diamond shape tickmarks / } else if (tickmarks == 'diamond') { this.context.fillStyle = this.context.strokeStyle; this.context.moveTo(x, y - halfTickSize); this.context.lineTo(x + halfTickSize, y); this.context.lineTo(x, y + halfTickSize); this.context.lineTo(x - halfTickSize, y); this.context.lineTo(x, y - halfTickSize); this.context.fill(); this.context.stroke(); /* * Custom tickmark style / } else if (typeof(tickmarks) == 'function') { var graphWidth = this.canvas.width - (2 this.Get('chart.gutter')) var xVal = ((x - this.Get('chart.gutter')) / graphWidth) * xMax; var yVal = ((this.graphheight - (y - this.Get('chart.gutter'))) / this.graphheight) * yMax; tickmarks(this, data, x, y, xVal, yVal, xMax, yMax, color) /** * No tickmarks / } else if (tickmarks == null) { /* * Unknown tickmark type / } else { alert('[SCATTER] (' + this.id + ') Unknown tickmark style: ' + tickmarks ); } } /* * Add the tickmark to the coords array / coords.push([x, y, tooltip]); } /* * Draws an optional line connecting the tick marks. * * @param i The index of the dataset to use / RGraph.Scatter.prototype.DrawLine = function (i) { if (this.Get('chart.line') && this.coords[i].length >= 2) { this.context.lineCap = 'round'; this.context.lineJoin = 'round'; this.context.lineWidth = this.GetLineWidth(i);// i is the index of the set of coordinates this.context.strokeStyle = this.Get('chart.line.colors')[i]; this.context.beginPath(); var len = this.coords[i].length; for (var j=0; j<this.coords[i].length; ++j) { var xPos = this.coords[i][j][0]; var yPos = this.coords[i][j][1]; if (j == 0) { this.context.moveTo(xPos, yPos); } else { // Stepped? var stepped = this.Get('chart.line.stepped'); if ( (typeof(stepped) == 'boolean' && stepped) \|\| (typeof(stepped) == 'object' && stepped[i]) ) { this.context.lineTo(this.coords[i][j][0], this.coords[i][j - 1][1]); } this.context.lineTo(xPos, yPos); } } this.context.stroke(); } /* * Set the linewidth back to 1 / this.context.lineWidth = 1; } /* * Returns the linewidth * * @param number i The index of the "line" (/set of coordinates) / RGraph.Scatter.prototype.GetLineWidth = function (i) { var linewidth = this.Get('chart.line.linewidth'); if (typeof(linewidth) == 'number') { return linewidth; } else if (typeof(linewidth) == 'object') { if (linewidth[i]) { return linewidth[i]; } else { return linewidth[0]; } alert('[SCATTER] Error! chart.linewidth should be a single number or an array of one or more numbers'); } } /* * Draws vertical bars. Line chart doesn't use a horizontal scale, hence this function * is not common / RGraph.Scatter.prototype.DrawVBars = function () { var canvas = this.canvas; var context = this.context; var vbars = this.Get('chart.background.vbars'); var gutter = this.Get('chart.gutter'); var graphWidth = canvas.width - gutter - gutter; if (vbars) { var xmax = this.Get('chart.xmax'); for (var i=0; i<vbars.length; ++i) { var startX = ((vbars[i][0] / xmax) graphWidth) + gutter; var width = (vbars[i][1] / xmax) * graphWidth; context.beginPath(); context.fillStyle = vbars[i][2]; context.fillRect(startX, gutter, width, (canvas.height - gutter - gutter)); context.fill(); } } }

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