723 lines
19 KiB
JavaScript
723 lines
19 KiB
JavaScript
/*
|
|
* heatmap.js v2.0.5 | JavaScript Heatmap Library
|
|
*
|
|
* Copyright 2008-2016 Patrick Wied <heatmapjs@patrick-wied.at> - All rights reserved.
|
|
* Dual licensed under MIT and Beerware license
|
|
*
|
|
* :: 2016-09-05 01:16
|
|
*/
|
|
;(function (name, context, factory) {
|
|
|
|
// Supports UMD. AMD, CommonJS/Node.js and browser context
|
|
if (typeof module !== "undefined" && module.exports) {
|
|
module.exports = factory();
|
|
} else if (typeof define === "function" && define.amd) {
|
|
define(factory);
|
|
} else {
|
|
context[name] = factory();
|
|
}
|
|
|
|
})("h337", this, function () {
|
|
|
|
// Heatmap Config stores default values and will be merged with instance config
|
|
var HeatmapConfig = {
|
|
defaultRadius: 40,
|
|
defaultRenderer: 'canvas2d',
|
|
defaultGradient: { 0.25: "rgb(0,0,255)", 0.55: "rgb(0,255,0)", 0.85: "yellow", 1.0: "rgb(255,0,0)"},
|
|
defaultMaxOpacity: 1,
|
|
defaultMinOpacity: 0,
|
|
defaultBlur: .85,
|
|
defaultXField: 'x',
|
|
defaultYField: 'y',
|
|
defaultValueField: 'value',
|
|
plugins: {}
|
|
};
|
|
var Store = (function StoreClosure() {
|
|
|
|
var Store = function Store(config) {
|
|
this._coordinator = {};
|
|
this._data = [];
|
|
this._radi = [];
|
|
this._min = 10;
|
|
this._max = 1;
|
|
this._xField = config['xField'] || config.defaultXField;
|
|
this._yField = config['yField'] || config.defaultYField;
|
|
this._valueField = config['valueField'] || config.defaultValueField;
|
|
|
|
if (config["radius"]) {
|
|
this._cfgRadius = config["radius"];
|
|
}
|
|
};
|
|
|
|
var defaultRadius = HeatmapConfig.defaultRadius;
|
|
|
|
Store.prototype = {
|
|
// when forceRender = false -> called from setData, omits renderall event
|
|
_organiseData: function(dataPoint, forceRender) {
|
|
var x = dataPoint[this._xField];
|
|
var y = dataPoint[this._yField];
|
|
var radi = this._radi;
|
|
var store = this._data;
|
|
var max = this._max;
|
|
var min = this._min;
|
|
var value = dataPoint[this._valueField] || 1;
|
|
var radius = dataPoint.radius || this._cfgRadius || defaultRadius;
|
|
|
|
if (!store[x]) {
|
|
store[x] = [];
|
|
radi[x] = [];
|
|
}
|
|
|
|
if (!store[x][y]) {
|
|
store[x][y] = value;
|
|
radi[x][y] = radius;
|
|
} else {
|
|
store[x][y] += value;
|
|
}
|
|
var storedVal = store[x][y];
|
|
|
|
if (storedVal > max) {
|
|
if (!forceRender) {
|
|
this._max = storedVal;
|
|
} else {
|
|
this.setDataMax(storedVal);
|
|
}
|
|
return false;
|
|
} else if (storedVal < min) {
|
|
if (!forceRender) {
|
|
this._min = storedVal;
|
|
} else {
|
|
this.setDataMin(storedVal);
|
|
}
|
|
return false;
|
|
} else {
|
|
return {
|
|
x: x,
|
|
y: y,
|
|
value: value,
|
|
radius: radius,
|
|
min: min,
|
|
max: max
|
|
};
|
|
}
|
|
},
|
|
_unOrganizeData: function() {
|
|
var unorganizedData = [];
|
|
var data = this._data;
|
|
var radi = this._radi;
|
|
|
|
for (var x in data) {
|
|
for (var y in data[x]) {
|
|
|
|
unorganizedData.push({
|
|
x: x,
|
|
y: y,
|
|
radius: radi[x][y],
|
|
value: data[x][y]
|
|
});
|
|
|
|
}
|
|
}
|
|
return {
|
|
min: this._min,
|
|
max: this._max,
|
|
data: unorganizedData
|
|
};
|
|
},
|
|
_onExtremaChange: function() {
|
|
this._coordinator.emit('extremachange', {
|
|
min: this._min,
|
|
max: this._max
|
|
});
|
|
},
|
|
addData: function() {
|
|
if (arguments[0].length > 0) {
|
|
var dataArr = arguments[0];
|
|
var dataLen = dataArr.length;
|
|
while (dataLen--) {
|
|
this.addData.call(this, dataArr[dataLen]);
|
|
}
|
|
} else {
|
|
// add to store
|
|
var organisedEntry = this._organiseData(arguments[0], true);
|
|
if (organisedEntry) {
|
|
// if it's the first datapoint initialize the extremas with it
|
|
if (this._data.length === 0) {
|
|
this._min = this._max = organisedEntry.value;
|
|
}
|
|
this._coordinator.emit('renderpartial', {
|
|
min: this._min,
|
|
max: this._max,
|
|
data: [organisedEntry]
|
|
});
|
|
}
|
|
}
|
|
return this;
|
|
},
|
|
setData: function(data) {
|
|
var dataPoints = data.data;
|
|
var pointsLen = dataPoints.length;
|
|
|
|
|
|
// reset data arrays
|
|
this._data = [];
|
|
this._radi = [];
|
|
|
|
for(var i = 0; i < pointsLen; i++) {
|
|
this._organiseData(dataPoints[i], false);
|
|
}
|
|
this._max = data.max;
|
|
this._min = data.min || 0;
|
|
|
|
this._onExtremaChange();
|
|
this._coordinator.emit('renderall', this._getInternalData());
|
|
return this;
|
|
},
|
|
removeData: function() {
|
|
// TODO: implement
|
|
},
|
|
setDataMax: function(max) {
|
|
this._max = max;
|
|
this._onExtremaChange();
|
|
this._coordinator.emit('renderall', this._getInternalData());
|
|
return this;
|
|
},
|
|
setDataMin: function(min) {
|
|
this._min = min;
|
|
this._onExtremaChange();
|
|
this._coordinator.emit('renderall', this._getInternalData());
|
|
return this;
|
|
},
|
|
setCoordinator: function(coordinator) {
|
|
this._coordinator = coordinator;
|
|
},
|
|
_getInternalData: function() {
|
|
return {
|
|
max: this._max,
|
|
min: this._min,
|
|
data: this._data,
|
|
radi: this._radi
|
|
};
|
|
},
|
|
getData: function() {
|
|
return this._unOrganizeData();
|
|
}/*,
|
|
|
|
TODO: rethink.
|
|
|
|
getValueAt: function(point) {
|
|
var value;
|
|
var radius = 100;
|
|
var x = point.x;
|
|
var y = point.y;
|
|
var data = this._data;
|
|
|
|
if (data[x] && data[x][y]) {
|
|
return data[x][y];
|
|
} else {
|
|
var values = [];
|
|
// radial search for datapoints based on default radius
|
|
for(var distance = 1; distance < radius; distance++) {
|
|
var neighbors = distance * 2 +1;
|
|
var startX = x - distance;
|
|
var startY = y - distance;
|
|
|
|
for(var i = 0; i < neighbors; i++) {
|
|
for (var o = 0; o < neighbors; o++) {
|
|
if ((i == 0 || i == neighbors-1) || (o == 0 || o == neighbors-1)) {
|
|
if (data[startY+i] && data[startY+i][startX+o]) {
|
|
values.push(data[startY+i][startX+o]);
|
|
}
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (values.length > 0) {
|
|
return Math.max.apply(Math, values);
|
|
}
|
|
}
|
|
return false;
|
|
}*/
|
|
};
|
|
|
|
|
|
return Store;
|
|
})();
|
|
|
|
var Canvas2dRenderer = (function Canvas2dRendererClosure() {
|
|
|
|
var _getColorPalette = function(config) {
|
|
var gradientConfig = config.gradient || config.defaultGradient;
|
|
var paletteCanvas = document.createElement('canvas');
|
|
var paletteCtx = paletteCanvas.getContext('2d', { willReadFrequently: true });
|
|
|
|
paletteCanvas.width = 256;
|
|
paletteCanvas.height = 1;
|
|
|
|
var gradient = paletteCtx.createLinearGradient(0, 0, 256, 1);
|
|
for (var key in gradientConfig) {
|
|
gradient.addColorStop(key, gradientConfig[key]);
|
|
}
|
|
|
|
paletteCtx.fillStyle = gradient;
|
|
paletteCtx.fillRect(0, 0, 256, 1);
|
|
|
|
return paletteCtx.getImageData(0, 0, 256, 1).data;
|
|
};
|
|
|
|
var _getPointTemplate = function(radius, blurFactor) {
|
|
var tplCanvas = document.createElement('canvas');
|
|
var tplCtx = tplCanvas.getContext('2d', { willReadFrequently: true });
|
|
var x = radius;
|
|
var y = radius;
|
|
tplCanvas.width = tplCanvas.height = radius*2;
|
|
|
|
if (blurFactor == 1) {
|
|
tplCtx.beginPath();
|
|
tplCtx.arc(x, y, radius, 0, 2 * Math.PI, false);
|
|
tplCtx.fillStyle = 'rgba(0,0,0,1)';
|
|
tplCtx.fill();
|
|
} else {
|
|
var gradient = tplCtx.createRadialGradient(x, y, radius*blurFactor, x, y, radius);
|
|
gradient.addColorStop(0, 'rgba(0,0,0,1)');
|
|
gradient.addColorStop(1, 'rgba(0,0,0,0)');
|
|
tplCtx.fillStyle = gradient;
|
|
tplCtx.fillRect(0, 0, 2*radius, 2*radius);
|
|
}
|
|
|
|
|
|
|
|
return tplCanvas;
|
|
};
|
|
|
|
var _prepareData = function(data) {
|
|
var renderData = [];
|
|
var min = data.min;
|
|
var max = data.max;
|
|
var radi = data.radi;
|
|
var data = data.data;
|
|
|
|
var xValues = Object.keys(data);
|
|
var xValuesLen = xValues.length;
|
|
|
|
while(xValuesLen--) {
|
|
var xValue = xValues[xValuesLen];
|
|
var yValues = Object.keys(data[xValue]);
|
|
var yValuesLen = yValues.length;
|
|
while(yValuesLen--) {
|
|
var yValue = yValues[yValuesLen];
|
|
var value = data[xValue][yValue];
|
|
var radius = radi[xValue][yValue];
|
|
renderData.push({
|
|
x: xValue,
|
|
y: yValue,
|
|
value: value,
|
|
radius: radius
|
|
});
|
|
}
|
|
}
|
|
|
|
return {
|
|
min: min,
|
|
max: max,
|
|
data: renderData
|
|
};
|
|
};
|
|
|
|
|
|
function Canvas2dRenderer(config) {
|
|
var container = config.container;
|
|
var shadowCanvas = this.shadowCanvas = document.createElement('canvas');
|
|
var canvas = this.canvas = config.canvas || document.createElement('canvas');
|
|
var renderBoundaries = this._renderBoundaries = [10000, 10000, 0, 0];
|
|
|
|
var computed = getComputedStyle(config.container) || {};
|
|
|
|
canvas.className = 'heatmap-canvas';
|
|
|
|
this._width = canvas.width = shadowCanvas.width = config.width || +(computed.width.replace(/px/,''));
|
|
this._height = canvas.height = shadowCanvas.height = config.height || +(computed.height.replace(/px/,''));
|
|
|
|
this.shadowCtx = shadowCanvas.getContext('2d', { willReadFrequently: true });
|
|
this.ctx = canvas.getContext('2d', { willReadFrequently: true });
|
|
|
|
// @TODO:
|
|
// conditional wrapper
|
|
|
|
canvas.style.cssText = shadowCanvas.style.cssText = 'position:absolute;left:0;top:0;';
|
|
|
|
container.style.position = 'relative';
|
|
container.appendChild(canvas);
|
|
|
|
this._palette = _getColorPalette(config);
|
|
this._templates = {};
|
|
|
|
this._setStyles(config);
|
|
};
|
|
|
|
Canvas2dRenderer.prototype = {
|
|
renderPartial: function(data) {
|
|
if (data.data.length > 0) {
|
|
this._drawAlpha(data);
|
|
this._colorize();
|
|
}
|
|
},
|
|
renderAll: function(data) {
|
|
// reset render boundaries
|
|
this._clear();
|
|
if (data.data.length > 0) {
|
|
this._drawAlpha(_prepareData(data));
|
|
this._colorize();
|
|
}
|
|
},
|
|
_updateGradient: function(config) {
|
|
this._palette = _getColorPalette(config);
|
|
},
|
|
updateConfig: function(config) {
|
|
if (config['gradient']) {
|
|
this._updateGradient(config);
|
|
}
|
|
this._setStyles(config);
|
|
},
|
|
setDimensions: function(width, height) {
|
|
this._width = width;
|
|
this._height = height;
|
|
this.canvas.width = this.shadowCanvas.width = width;
|
|
this.canvas.height = this.shadowCanvas.height = height;
|
|
},
|
|
_clear: function() {
|
|
this.shadowCtx.clearRect(0, 0, this._width, this._height);
|
|
this.ctx.clearRect(0, 0, this._width, this._height);
|
|
},
|
|
_setStyles: function(config) {
|
|
this._blur = (config.blur == 0)?0:(config.blur || config.defaultBlur);
|
|
|
|
if (config.backgroundColor) {
|
|
this.canvas.style.backgroundColor = config.backgroundColor;
|
|
}
|
|
|
|
this._width = this.canvas.width = this.shadowCanvas.width = config.width || this._width;
|
|
this._height = this.canvas.height = this.shadowCanvas.height = config.height || this._height;
|
|
|
|
|
|
this._opacity = (config.opacity || 0) * 255;
|
|
this._maxOpacity = (config.maxOpacity || config.defaultMaxOpacity) * 255;
|
|
this._minOpacity = (config.minOpacity || config.defaultMinOpacity) * 255;
|
|
this._useGradientOpacity = !!config.useGradientOpacity;
|
|
},
|
|
_drawAlpha: function(data) {
|
|
var min = this._min = data.min;
|
|
var max = this._max = data.max;
|
|
var data = data.data || [];
|
|
var dataLen = data.length;
|
|
// on a point basis?
|
|
var blur = 1 - this._blur;
|
|
|
|
while(dataLen--) {
|
|
|
|
var point = data[dataLen];
|
|
|
|
var x = point.x;
|
|
var y = point.y;
|
|
var radius = point.radius;
|
|
// if value is bigger than max
|
|
// use max as value
|
|
var value = Math.min(point.value, max);
|
|
var rectX = x - radius;
|
|
var rectY = y - radius;
|
|
var shadowCtx = this.shadowCtx;
|
|
|
|
|
|
|
|
|
|
var tpl;
|
|
if (!this._templates[radius]) {
|
|
this._templates[radius] = tpl = _getPointTemplate(radius, blur);
|
|
} else {
|
|
tpl = this._templates[radius];
|
|
}
|
|
// value from minimum / value range
|
|
// => [0, 1]
|
|
var templateAlpha = (value-min)/(max-min);
|
|
// this fixes #176: small values are not visible because globalAlpha < .01 cannot be read from imageData
|
|
shadowCtx.globalAlpha = templateAlpha < .01 ? .01 : templateAlpha;
|
|
|
|
shadowCtx.drawImage(tpl, rectX, rectY);
|
|
|
|
// update renderBoundaries
|
|
if (rectX < this._renderBoundaries[0]) {
|
|
this._renderBoundaries[0] = rectX;
|
|
}
|
|
if (rectY < this._renderBoundaries[1]) {
|
|
this._renderBoundaries[1] = rectY;
|
|
}
|
|
if (rectX + 2*radius > this._renderBoundaries[2]) {
|
|
this._renderBoundaries[2] = rectX + 2*radius;
|
|
}
|
|
if (rectY + 2*radius > this._renderBoundaries[3]) {
|
|
this._renderBoundaries[3] = rectY + 2*radius;
|
|
}
|
|
|
|
}
|
|
},
|
|
_colorize: function() {
|
|
var x = this._renderBoundaries[0];
|
|
var y = this._renderBoundaries[1];
|
|
var width = this._renderBoundaries[2] - x;
|
|
var height = this._renderBoundaries[3] - y;
|
|
var maxWidth = this._width;
|
|
var maxHeight = this._height;
|
|
var opacity = this._opacity;
|
|
var maxOpacity = this._maxOpacity;
|
|
var minOpacity = this._minOpacity;
|
|
var useGradientOpacity = this._useGradientOpacity;
|
|
|
|
if (x < 0) {
|
|
x = 0;
|
|
}
|
|
if (y < 0) {
|
|
y = 0;
|
|
}
|
|
if (x + width > maxWidth) {
|
|
width = maxWidth - x;
|
|
}
|
|
if (y + height > maxHeight) {
|
|
height = maxHeight - y;
|
|
}
|
|
|
|
var img = this.shadowCtx.getImageData(x, y, width, height);
|
|
var imgData = img.data;
|
|
var len = imgData.length;
|
|
var palette = this._palette;
|
|
|
|
|
|
for (var i = 3; i < len; i+= 4) {
|
|
var alpha = imgData[i];
|
|
var offset = alpha * 4;
|
|
|
|
|
|
if (!offset) {
|
|
continue;
|
|
}
|
|
|
|
var finalAlpha;
|
|
if (opacity > 0) {
|
|
finalAlpha = opacity;
|
|
} else {
|
|
if (alpha < maxOpacity) {
|
|
if (alpha < minOpacity) {
|
|
finalAlpha = minOpacity;
|
|
} else {
|
|
finalAlpha = alpha;
|
|
}
|
|
} else {
|
|
finalAlpha = maxOpacity;
|
|
}
|
|
}
|
|
|
|
imgData[i-3] = palette[offset];
|
|
imgData[i-2] = palette[offset + 1];
|
|
imgData[i-1] = palette[offset + 2];
|
|
imgData[i] = useGradientOpacity ? palette[offset + 3] : finalAlpha;
|
|
|
|
}
|
|
|
|
this.ctx.putImageData(img, x, y);
|
|
|
|
this._renderBoundaries = [1000, 1000, 0, 0];
|
|
|
|
},
|
|
getValueAt: function(point) {
|
|
var value;
|
|
var shadowCtx = this.shadowCtx;
|
|
var img = shadowCtx.getImageData(point.x, point.y, 1, 1);
|
|
var data = img.data[3];
|
|
var max = this._max;
|
|
var min = this._min;
|
|
|
|
value = (Math.abs(max-min) * (data/255)) >> 0;
|
|
|
|
return value;
|
|
},
|
|
getDataURL: function() {
|
|
return this.canvas.toDataURL();
|
|
}
|
|
};
|
|
|
|
|
|
return Canvas2dRenderer;
|
|
})();
|
|
|
|
|
|
var Renderer = (function RendererClosure() {
|
|
|
|
var rendererFn = false;
|
|
|
|
if (HeatmapConfig['defaultRenderer'] === 'canvas2d') {
|
|
rendererFn = Canvas2dRenderer;
|
|
}
|
|
|
|
return rendererFn;
|
|
})();
|
|
|
|
|
|
var Util = {
|
|
merge: function() {
|
|
var merged = {};
|
|
var argsLen = arguments.length;
|
|
for (var i = 0; i < argsLen; i++) {
|
|
var obj = arguments[i]
|
|
for (var key in obj) {
|
|
merged[key] = obj[key];
|
|
}
|
|
}
|
|
return merged;
|
|
}
|
|
};
|
|
// Heatmap Constructor
|
|
var Heatmap = (function HeatmapClosure() {
|
|
|
|
var Coordinator = (function CoordinatorClosure() {
|
|
|
|
function Coordinator() {
|
|
this.cStore = {};
|
|
};
|
|
|
|
Coordinator.prototype = {
|
|
on: function(evtName, callback, scope) {
|
|
var cStore = this.cStore;
|
|
|
|
if (!cStore[evtName]) {
|
|
cStore[evtName] = [];
|
|
}
|
|
cStore[evtName].push((function(data) {
|
|
return callback.call(scope, data);
|
|
}));
|
|
},
|
|
emit: function(evtName, data) {
|
|
var cStore = this.cStore;
|
|
if (cStore[evtName]) {
|
|
var len = cStore[evtName].length;
|
|
for (var i=0; i<len; i++) {
|
|
var callback = cStore[evtName][i];
|
|
callback(data);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
return Coordinator;
|
|
})();
|
|
|
|
|
|
var _connect = function(scope) {
|
|
var renderer = scope._renderer;
|
|
var coordinator = scope._coordinator;
|
|
var store = scope._store;
|
|
|
|
coordinator.on('renderpartial', renderer.renderPartial, renderer);
|
|
coordinator.on('renderall', renderer.renderAll, renderer);
|
|
coordinator.on('extremachange', function(data) {
|
|
scope._config.onExtremaChange &&
|
|
scope._config.onExtremaChange({
|
|
min: data.min,
|
|
max: data.max,
|
|
gradient: scope._config['gradient'] || scope._config['defaultGradient']
|
|
});
|
|
});
|
|
store.setCoordinator(coordinator);
|
|
};
|
|
|
|
|
|
function Heatmap() {
|
|
var config = this._config = Util.merge(HeatmapConfig, arguments[0] || {});
|
|
this._coordinator = new Coordinator();
|
|
if (config['plugin']) {
|
|
var pluginToLoad = config['plugin'];
|
|
if (!HeatmapConfig.plugins[pluginToLoad]) {
|
|
throw new Error('Plugin \''+ pluginToLoad + '\' not found. Maybe it was not registered.');
|
|
} else {
|
|
var plugin = HeatmapConfig.plugins[pluginToLoad];
|
|
// set plugin renderer and store
|
|
this._renderer = new plugin.renderer(config);
|
|
this._store = new plugin.store(config);
|
|
}
|
|
} else {
|
|
this._renderer = new Renderer(config);
|
|
this._store = new Store(config);
|
|
}
|
|
_connect(this);
|
|
};
|
|
|
|
// @TODO:
|
|
// add API documentation
|
|
Heatmap.prototype = {
|
|
addData: function() {
|
|
this._store.addData.apply(this._store, arguments);
|
|
return this;
|
|
},
|
|
removeData: function() {
|
|
this._store.removeData && this._store.removeData.apply(this._store, arguments);
|
|
return this;
|
|
},
|
|
setData: function() {
|
|
this._store.setData.apply(this._store, arguments);
|
|
return this;
|
|
},
|
|
setDataMax: function() {
|
|
this._store.setDataMax.apply(this._store, arguments);
|
|
return this;
|
|
},
|
|
setDataMin: function() {
|
|
this._store.setDataMin.apply(this._store, arguments);
|
|
return this;
|
|
},
|
|
configure: function(config) {
|
|
this._config = Util.merge(this._config, config);
|
|
this._renderer.updateConfig(this._config);
|
|
this._coordinator.emit('renderall', this._store._getInternalData());
|
|
return this;
|
|
},
|
|
repaint: function() {
|
|
this._coordinator.emit('renderall', this._store._getInternalData());
|
|
return this;
|
|
},
|
|
getData: function() {
|
|
return this._store.getData();
|
|
},
|
|
getDataURL: function() {
|
|
return this._renderer.getDataURL();
|
|
},
|
|
getValueAt: function(point) {
|
|
|
|
if (this._store.getValueAt) {
|
|
return this._store.getValueAt(point);
|
|
} else if (this._renderer.getValueAt) {
|
|
return this._renderer.getValueAt(point);
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
};
|
|
|
|
return Heatmap;
|
|
|
|
})();
|
|
|
|
|
|
// core
|
|
var heatmapFactory = {
|
|
create: function(config) {
|
|
return new Heatmap(config);
|
|
},
|
|
register: function(pluginKey, plugin) {
|
|
HeatmapConfig.plugins[pluginKey] = plugin;
|
|
}
|
|
};
|
|
|
|
return heatmapFactory;
|
|
|
|
|
|
}); |