/** * 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 | * 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. */ if (typeof(RGraph) == 'undefined') RGraph = {}; if (typeof(RGraph.Drawing) == 'undefined') RGraph.Drawing = {}; /** * The constructor. This function sets up the object. It takes the ID (the HTML attribute) of the canvas as the * first argument, then th X position, the Y position and then the text to show * * @param string id The canvas tag ID * @param number x The X position of the text * @param number y The Y position of the text * @param number text The text to show */ RGraph.Drawing.Text = function (id, x, y, text) { this.id = id; this.canvas = document.getElementById(typeof id === 'object' ? id.id : id); this.context = this.canvas.getContext ? this.canvas.getContext("2d") : null; this.colorsParsed = false; this.canvas.__object__ = this; this.x = x; this.y = y; this.text = text; this.coords = []; this.coordsText = []; /** * This defines the type of this shape */ this.type = 'drawing.text'; /** * 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(); /** * This does a few things, for example adding the .fillText() method to the canvas 2D context when * it doesn't exist. This facilitates the graphs to be still shown in older browser (though without * text obviously). You'll find the function in RGraph.common.core.js */ RGraph.OldBrowserCompat(this.context); /** * Some example background properties */ this.properties = { 'chart.size': 10, 'chart.font': 'Arial', 'chart.bold': false, 'chart.angle': 0, 'chart.colors': ['black'], 'chart.events.click': null, 'chart.events.mousemove': null, 'chart.highlight.stroke': '#ccc', 'chart.highlight.fill': 'rgba(255,255,255,0.7)', 'chart.tooltips': null, 'chart.tooltips.effect': 'fade', 'chart.tooltips.css.class': 'RGraph_tooltip', 'chart.tooltips.event': 'onclick', 'chart.tooltips.highlight': true, 'chart.tooltips.coords.page': false, 'chart.bounding': false, 'chart.bounding.fill': 'rgba(255,255,255,0.7)', 'chart.bounding.stroke': '#777', 'chart.bounding.shadow': false, 'chart.bounding.shadow.color': '#ccc', 'chart.bounding.shadow.blur': 3, 'chart.bounding.shadow.offsetx': 3, 'chart.bounding.shadow.offsety': 3, 'chart.marker': false, 'chart.halign': 'left', 'chart.valign': 'bottom' } /** * A simple check that the browser has canvas support */ if (!this.canvas) { alert('[DRAWING.TEXT] 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 */ if (!this.canvas.__rgraph_aa_translated__) { this.context.translate(0.5,0.5); this.canvas.__rgraph_aa_translated__ = true; } ///////////////////////////////// SHORT PROPERTIES ///////////////////////////////// var RG = RGraph; var ca = this.canvas; var co = ca.getContext('2d'); var prop = this.properties; //////////////////////////////////// METHODS /////////////////////////////////////// /** * A setter method for setting properties. * * @param name string The name of the property to set * @param value mixed The value of the property */ this.Set = function (name, value) { 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 = 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 rectangle */ this.Draw = function () { /** * Fire the onbeforedraw event */ RG.FireCustomEvent(this, 'onbeforedraw'); /** * Parse the colors. This allows for simple gradient syntax */ if (!this.colorsParsed) { this.parseColors(); // Don't want to do this again this.colorsParsed = true; } /** * Stop the coods array from growing */ this.coords = []; /** * The font, its size and whether its bold or not can be set by properties, * so now they have been (potentiall) set - measure the text */ /** * Measure the text and add the width/height * * text, bold, font, size * */ var dimensions = RG.MeasureText(this.text, prop['chart.text.bold'],prop['chart.text.font'], prop['chart.text.size']); // ------------- DRAW TEXT HERE ------------- co.fillStyle = prop['chart.colors'][0]; var ret = RG.Text2(this, {'font': prop['chart.font'], 'size': prop['chart.size'], 'x': this.x, 'y': this.y, 'text': this.text, 'bold': prop['chart.bold'], 'angle': prop['chart.angle'], 'bounding': prop['chart.bounding'], 'bounding.fill': prop['chart.bounding.fill'], 'bounding.stroke': prop['chart.bounding.stroke'], 'bounding.shadow': prop['chart.bounding.shadow'], 'bounding.shadow.color': prop['chart.bounding.shadow.color'], 'bounding.shadow.blur': prop['chart.bounding.shadow.blur'], 'bounding.shadow.offsetx': prop['chart.bounding.shadow.offsetx'], 'bounding.shadow.offsety': prop['chart.bounding.shadow.offsety'], 'marker': prop['chart.marker'], 'halign': prop['chart.halign'], 'valign': prop['chart.valign'] }); // store the dimensions this.coords.push({'x':ret.x, 'y':ret.y, 'width':ret.width, 'height':ret.height}); /** * This installs the event listeners */ RG.InstallEventListeners(this); /** * 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 graph, 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 prop = this.properties; var coords = this.coords; var mouseXY = RGraph.getMouseXY(e); var mouseX = mouseXY[0]; var mouseY = mouseXY[1]; for (var i=0,len=this.coords.length; i= left && mouseX <= (left + width) && mouseY >= top && mouseY <= (top + height)) { return { 0: this, 1: left, 2: top, 3: width, 4: height, 5: 0, 'object': this, 'x': left, 'y': top, 'width': width, 'height': height, '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) { var coords = obj.coords[0]; var coordX = coords.x; var coordY = coords.y; var coordW = coords.width; var coordH = coords.height; var canvasXY = RGraph.getCanvasXY(obj.canvas); var width = tooltip.offsetWidth; var height = tooltip.offsetHeight; // Set the top position tooltip.style.left = 0; tooltip.style.top = canvasXY[1] + coordY + (coordH / 2) - height + '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 = (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 = 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 = (canvasXY[0] + coordX + (coordW / 2) - (width * 0.5)) + '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 = function (shape) { // Add the new highlight RG.Highlight.Rect(this, shape); } /** * This allows for easy specification of gradients */ this.parseColors = function () { /** * Parse various properties for colors */ prop['chart.fillstyle'] = this.parseSingleColorForGradient(prop['chart.fillstyle']); prop['chart.strokestyle'] = this.parseSingleColorForGradient(prop['chart.strokestyle']); prop['chart.highlight.stroke'] = this.parseSingleColorForGradient(prop['chart.highlight.stroke']); prop['chart.highlight.fill'] = this.parseSingleColorForGradient(prop['chart.highlight.fill']); } /** * This parses a single color value */ this.parseSingleColorForGradient = function (color) { if (!color) { return color; } if (color.match(/^gradient\((.*)\)$/i)) { var parts = RegExp.$1.split(':'); // Create the gradient var grad = co.createLinearGradient(0,0,ca.width,0); var diff = 1 / (parts.length - 1); grad.addColorStop(0, RGraph.trim(parts[0])); for (var j=1,len=parts.length; j