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timeline.js/timeline.js

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/* Timeline.js
* Author : Phyks (http://phyks.me)
* http://phyks.github.io/timeline.js
* --------------------------------------------------------------------------------
* "THE NO-ALCOHOL BEER-WARE LICENSE" (Revision 42):
* Phyks (webmaster@phyks.me) wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff (and you can also do whatever you want
* with this stuff without retaining it, but that's not cool...). If we meet some
* day, and you think this stuff is worth it, you can buy me a <del>beer</del> soda
* in return.
* Phyks
* ---------------------------------------------------------------------------------
*/
/* Initialization :
* arg is an object with :
* id = id of the parent block
* height / width = size of the svg
* grid = small / big / both
* x_axis = true / false to show or hide x axis
* line = none / line / dashed to choose line type
* rounded = true / false to use splines to smoothen the graph
* x_callback = function(args) { } or false is called to display the legend on the x axis
* fill = true / false to fill below the graph or not
*/
function Timeline(arg) {
this.ns = "http://www.w3.org/2000/svg";
this.xlinkns = "http://www.w3.org/1999/xlink";
this.marginBottom = 10;
this.marginTop = 15;
this.marginLeft = 10;
this.marginRight = 10;
this.rounded = false;
this.x_axis = false;
this.fill = true;
this.line = 'line';
this.dashed_style = '5, 5';
this.parent_holder = false;
this.holder = false;
this.g = false;
this.axis = false;
this.graphs = [];
this.raw_points = [];
this.x_callback = false;
var old = window.onresize || function () {};
var obj = this;
window.onresize = function() {
old();
obj.resize(obj.parent_holder.offsetWidth, obj.parent_holder.offsetHeight);
}
if(!document.implementation.hasFeature("http://www.w3.org/TR/SVG11/feature#Image", "1.1")) {
alert("ERROR : Your browser does not support embedded SVG.");
}
this.parent_holder = document.getElementById(arg.id);
this.parent_holder.style.width = arg.width;
this.parent_holder.style.height = arg.height;
var svg = this.createElement('svg:svg', { 'width': '100%', 'height': '100%' });
svg.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:xlink', this.xlinkns);
this.parent_holder.appendChild(svg);
this.holder = this.parent_holder.querySelector('svg');
defs = this.createElement('defs', {});
this.holder.appendChild(defs);
if(arg.grid === 'small' || arg.grid === 'both') {
var small_grid_pattern = this.createElement('pattern', { 'id': 'smallGrid', 'width': 8, 'height': 8, 'patternUnits': 'userSpaceOnUse' });
var small_grid_path = this.createElement('path', { 'd': 'M 8 0 L 0 0 0 8', 'fill': 'none', 'stroke': 'gray', 'stroke-width': '0.5' });
small_grid_pattern.appendChild(small_grid_path);
defs.appendChild(small_grid_pattern);
}
if(arg.grid === 'big' || arg.grid === 'both') {
var grid_pattern = this.createElement('pattern', { 'id': 'grid', 'width': 80, 'height': 80, 'patternUnits': 'userSpaceOnUse' });
if(arg.grid === 'both') {
var grid_rect = this.createElement('rect', {'width': 80, 'height': 80, 'fill': 'url(#smallGrid)' });
grid_pattern.appendChild(grid_rect);
}
var grid_path = this.createElement('path', {'d': 'M 80 0 L 0 0 0 80', 'fill': 'none', 'stroke': 'gray', 'stroke-width': '1'});
grid_pattern.appendChild(grid_path);
defs.appendChild(grid_pattern);
}
this.grid = arg.grid;
var marker = this.createElement('marker', {'id': 'markerArrow', 'markerWidth': 13, 'markerHeight': 13, 'refX': 2, 'refY': 6, 'orient': 'auto' });
var marker_path = this.createElement('path', {'d': 'M2,2 L2,11 L10,6 L2,2', 'fill': 'gray' });
marker.appendChild(marker_path);
defs.appendChild(marker);
this.g = this.createElement('g', {'transform': 'translate(0, ' + this.parent_holder.offsetHeight + ') scale(1, -1)'});
this.holder.appendChild(this.g);
if(arg.x_axis === true) {
this.axis = this.createElement('line', {'x1': this.marginLeft, 'y1': this.parent_holder.offsetHeight / 2 + 1.5, 'x2': this.parent_holder.offsetWidth - 13 - this.marginRight, 'y2': this.parent_holder.offsetHeight / 2 + 1.5, 'stroke': 'gray', 'stroke-width': 3, 'marker-end': 'url("#markerArrow")'});
this.g.appendChild(this.axis);
}
if(this.grid !== "none") {
var grid = this.createElement('rect', {'width': '100%', 'height': '100%'});
if(this.grid === 'big' || this.grid === 'both') {
grid.setAttribute('fill', 'url(#grid)');
}
else {
grid.setAttribute('fill', 'url(#smallGrid)');
}
this.g.appendChild(grid);
}
this.rounded = arg.rounded;
this.x_axis = arg.x_axis;
this.line = arg.line;
this.fill = arg.fill;
this.x_callback = arg.x_callback;
}
// Resize the SVG
Timeline.prototype.resize = function(new_width, new_height) {
if(this.g !== false) {
this.g.setAttribute('transform', 'translate(0, ' + new_height + ') scale(1, -1)');
if(this.x_axis === true) {
this.axis.setAttribute('x2', new_width - this.marginLeft - 3 - this.marginRight);
}
[].forEach.call(this.holder.querySelectorAll('.label, .over, .point, .line, .graph, .legend_x'), function(el) {
el.parentNode.removeChild(el);
});
this.draw();
}
};
// Create an element "element" with the attributes "attrs"
Timeline.prototype.createElement = function (element, attrs) {
var el = document.createElementNS(this.ns, element);
for(attr in attrs) {
el.setAttribute(attr, attrs[attr]);
}
return el;
};
// Check wether the element "element" has class "class"
Timeline.prototype.hasClass = function (element, cls) {
return (' ' + element.getAttribute('class') + ' ').indexOf(' ' + cls + ' ') > -1;
};
// Add a new graph to the Timeline
Timeline.prototype.addGraph = function (graph, color) {
this.graphs[graph] = color;
};
// Test wether a graph of name "graph" already exists
Timeline.prototype.hasGraph = function (graph) {
if(typeof(this.graphs[graph]) === 'undefined') {
return false;
}
else {
return true;
}
};
// Clear the specified graph data, or completely clear all the graph data
Timeline.prototype.clearGraph = function (graph) {
if(typeof(graph) === 'undefined') {
this.raw_points = [];
this.graphs = [];
}
else {
for(var i = 0; i < this.raw_points.length; i++) {
if(this.raw_points[i].graph === graph) {
this.raw_points[i] = undefined;
}
}
}
};
// Add points to the specified graph
Timeline.prototype.addPoints = function (graph, data) {
for(var point = 0; point < data.length; point++) {
var insert = {'graph': graph, 'x': data[point].x, 'y': data[point].y};
if(typeof(data[point].label) !== 'undefined') {
insert.label = data[point].label;
}
else {
insert.label = '';
}
if(typeof(data[point].click) !== 'undefined') {
insert.click = data[point].click;
}
else {
insert.click = false;
}
this.raw_points.push(insert);
}
this.raw_points.sort(function (a, b) {
if(a.x < b.x) {
return -1;
}
else if(a.x == b.x) {
return 0;
}
else {
return 1;
}
});
};
// Compute new coordinates, knowing the min and max value to fit the graph in the container
Timeline.prototype.newCoordinate = function(value, min, max, minValue, maxValue) {
var a = (maxValue - minValue) / (max - min);
return a *(value - min) + minValue;
};
// Compute new X and Y values
Timeline.prototype.getNewXY = function (minX, maxX, minY, maxY) {
var obj = this;
return function (x, y) {
return {
'x': obj.newCoordinate(x, minX, maxX, obj.marginLeft, obj.parent_holder.offsetWidth - obj.marginRight),
'y': obj.newCoordinate(y, minY, maxY, 2*obj.marginBottom, obj.parent_holder.offsetHeight - obj.marginTop)
};
};
};
// Get the necessary control points to smoothen the graph, is rounded is true
Timeline.prototype.getControlPoints = function (data) {
// From http://www.particleincell.com/wp-content/uploads/2012/06/bezier-spline.js
var p1 = new Array();
var p2 = new Array();
var n = data.length - 1;
/*rhs vector*/
var a = new Array();
var b = new Array();
var c = new Array();
var r = new Array();
/*left most segment*/
a[0] = 0;
b[0] = 2;
c[0] = 1;
r[0] = data[0] + 2*data[1];
/*internal segments*/
for (var i = 1; i < n - 1; i++) {
a[i] = 1;
b[i] = 4;
c[i] = 1;
r[i] = 4 * data[i] + 2 * data[i+1];
}
/*right segment*/
a[n-1] = 2;
b[n-1] = 7;
c[n-1] = 0;
r[n-1] = 8*data[n-1] + data[n];
/*solves Ax=b with the Thomas algorithm (from Wikipedia)*/
var m;
for (var i = 1; i < n; i++) {
m = a[i]/b[i-1];
b[i] = b[i] - m * c[i - 1];
r[i] = r[i] - m*r[i-1];
}
p1[n-1] = r[n-1]/b[n-1];
for (var i = n - 2; i >= 0; --i) {
p1[i] = (r[i] - c[i] * p1[i+1]) / b[i];
}
/*we have p1, now compute p2*/
for (var i=0;i<n-1;i++) {
p2[i] = 2*data[i+1] - p1[i+1];
}
p2[n-1] = 0.5*(data[n] + p1[n-1]);
return {p1:p1, p2:p2};
};
// Get the scale so that graph fits with window
Timeline.prototype.scale = function(data) {
var empty = true;
for(graph in data) {
empty = false;
break;
}
if(empty) {
return false;
}
var minX = false, minY = 0;
var maxX = false, maxY = false;
var circle = false, last_point = false, line = false;
// Look for max and min values for both axis
for(var point = 0; point < data.length; point++) {
if(data[point].x < minX || minX === false) {
minX = data[point].x;
}
if(data[point].x > maxX || maxX === false) {
maxX = data[point].x;
}
if(data[point].y < minY) {
minY = data[point].y;
}
if(data[point].y > maxY || maxY === false) {
maxY = data[point].y;
}
}
// Scale the grid, if needed
var scale = this.getNewXY(minX, maxX, minY, maxY);
var tmp = scale(Math.pow(10, Math.floor(Math.log(maxX - minX) / Math.log(10))), Math.pow(10, Math.floor(Math.log(maxY - minY) / Math.log(10))));
var origin = scale(0, 0);
var coordinates = {'x': tmp.x - origin.x, 'y': tmp.y - origin.y };
if(this.grid === 'big' || this.grid === 'both') {
var grid = this.holder.getElementById('grid');
grid.setAttribute('width', coordinates.x);
grid.setAttribute('height', coordinates.y);
var big_coords = scale(Math.floor(minX / Math.pow(10, Math.floor(Math.log(maxX - minX) / Math.log(10)))) * Math.pow(10, Math.floor(Math.log(maxX - minX) / Math.log(10))), Math.floor(minY / Math.pow(10, Math.floor(Math.log(maxY - minY) / Math.log(10)))) * Math.pow(10, Math.floor(Math.log(maxY - minY) / Math.log(10))));
grid.setAttribute('y', big_coords.y);
grid.setAttribute('x', big_coords.x);
grid.querySelector('path').setAttribute('d', 'M '+coordinates.x+' 0 L 0 0 0 '+coordinates.y);
if(this.grid === 'both') {
grid.querySelector('rect').setAttribute('width', coordinates.x);
grid.querySelector('rect').setAttribute('height', coordinates.y);
}
}
if(this.grid === 'small' || this.grid === 'both') {
coordinates.x = coordinates.x / 10;
coordinates.y = coordinates.y / 10;
var grid = this.holder.getElementById('smallGrid');
grid.setAttribute('width', coordinates.x);
grid.setAttribute('height', coordinates.y);
if(this.grid === 'small') {
var small_coords = scale(Math.floor(minX / Math.pow(10, Math.floor(Math.log(maxX - minX) / Math.log(10)))) * Math.pow(10, Math.floor(Math.log(maxX - minX) / Math.log(10))), Math.floor(minY / Math.pow(10, Math.floor(Math.log(maxY - minY) / Math.log(10)))) * Math.pow(10, Math.floor(Math.log(maxY - minY) / Math.log(10))));
grid.setAttribute('y', small_coords.y);
grid.setAttribute('x', small_coords.x);
}
grid.querySelector('path').setAttribute('d', 'M '+coordinates.x+' 0 L 0 0 0 '+coordinates.y);
}
/* Draw axis */
if(this.x_axis === true) {
y = scale(0, 0).y;
this.axis.setAttribute('y1', y);
this.axis.setAttribute('y2', y);
}
return scale;
};
// Draw graphs
Timeline.prototype.draw = function() {
var scale = this.scale(this.raw_points);
var points = [], path;
var px, py;
var element;
var obj = this;
for(var point = 0; point < this.raw_points.length; point++) {
var tmp = scale(this.raw_points[point].x, this.raw_points[point].y);
points.push({'id': point, 'x': tmp.x, 'y': tmp.y, 'graph': this.raw_points[point].graph, 'click': this.raw_points[point].click, 'label': this.raw_points[point].label});
}
// Draw each graph
for(var graph in this.graphs) {
var filtered_points = points.filter(function(el) { return el.graph == graph; });
path = '';
// Draw line
if(this.rounded === true) {
var x = new Array(), y = new Array();
for(var point = 0; point < filtered_points.length; point++) {
x.push(filtered_points[point].x);
y.push(filtered_points[point].y);
}
px = this.getControlPoints(x);
py = this.getControlPoints(y);
for(var point = 0; point < filtered_points.length - 1; point++) {
path += 'C '+px.p1[point]+' '+py.p1[point]+' '+px.p2[point]+' '+py.p2[point]+' '+filtered_points[point+1].x+' '+filtered_points[point+1].y+' ';
}
}
else {
for(var point = 1; point < filtered_points.length; point++) {
path += 'L '+filtered_points[point].x+' '+filtered_points[point].y+' ';
}
}
if(this.line !== 'none' && filtered_points.length !== 0) {
element = this.createElement('path', {'class': 'line', 'stroke': this.graphs[graph], 'stroke-width': 2, 'fill': 'none', 'd': 'M '+filtered_points[0].x+' '+filtered_points[0].y+' '+path});
if(this.line === 'dashed') {
element.setAttribute('style', 'stroke-dasharray: '+this.dashed_style);
}
this.g.appendChild(element);
}
// Draw fill
if(this.fill) {
element = this.createElement('path', {'class': 'graph', 'fill': this.graphs[graph], 'opacity': '0.25', 'stroke': 'none', 'd': 'M '+filtered_points[0].x+' '+2*this.marginBottom+' L '+filtered_points[0].x+' '+filtered_points[0].y+' '+ path + ' L '+filtered_points[filtered_points.length - 1].x+' '+2*this.marginBottom+' Z' });
this.g.insertBefore(element, this.g.querySelectorAll('.over')[0]);
}
}
// Hover effect
var prev = 0;
for(var point = 0; point < points.length;) {
var rect = this.createElement('rect', {'class': 'over', 'id': 'over_'+point, 'y': 0, 'fill': 'white', 'opacity': 0, 'height': '100%'});
var currents = [point];
var next = point + 1;
if(point < points.length - 1) {
while(points[next].x == points[point].x) {
if(i > points.length) {
break;
}
next++;
}
}
for(var i = prev + 1; i < next; i++) {
currents.push(i);
}
if(point == 0) {
rect.setAttribute('x', 0);
}
else {
rect.setAttribute('x', (points[point].x + points[prev].x) / 2);
}
if(point == points.length - 1) {
rect.setAttribute('width', this.parent_holder.offsetWidth - (points[point].x + points[point - 1].x)/2 + 1);
}
else if(point == 0) {
rect.setAttribute('width', (points[1].x + points[0].x)/2 + this.marginLeft + 1);
}
else {
rect.setAttribute('width', (points[next].x - points[prev].x)/2 + 1);
}
this.g.appendChild(rect);
rect.addEventListener('mouseover', (function(arg) {
return function() {
for(var i = 0; i < arg.length; i++) {
obj.holder.getElementById('point_'+arg[i]).setAttribute('r', '6');
obj.holder.getElementById('label_'+arg[i]).setAttribute('display', 'block');
}
};
})(currents));
rect.addEventListener('mouseout', function() {
// Reinitialize all states
[].forEach.call(obj.holder.querySelectorAll('.point'), function(el) {
el.setAttribute('r', '4');
});
[].forEach.call(obj.holder.querySelectorAll('.label'), function(el) {
el.setAttribute('display', 'none');
});
});
// Clear also the labels when moving outside the SVG element
this.holder.addEventListener('mouseout', function() {
// Reinitialize all states
[].forEach.call(obj.holder.querySelectorAll('.point'), function(el) {
el.setAttribute('r', '4');
});
[].forEach.call(obj.holder.querySelectorAll('.label'), function(el) {
el.setAttribute('display', 'none');
});
});
if(this.x_callback !== false && points[point].x + 2.5 < this.parent_holder.offsetWidth - this.marginRight) {
element = this.createElement('text', {'class': 'legend_x', 'fill': 'gray', 'transform': 'translate(0, ' + this.parent_holder.offsetHeight + ') scale(1, -1)'});
element.appendChild(document.createTextNode(this.x_callback(this.raw_points[point].x)));
this.g.appendChild(element);
element.setAttribute('x', points[point].x - element.getBoundingClientRect().width / 2 + 2.5);
var y_zero = scale(0, 0).y;
element.setAttribute('y', this.parent_holder.offsetHeight - this.marginBottom - y_zero);
element = this.createElement('line', {'class': 'legend_x', 'stroke': 'gray', 'stroke-width': 2, 'x1': points[point].x, 'x2': points[point].x, 'y1': y_zero - 5, 'y2': y_zero + 5});
this.g.appendChild(element);
}
prev = next - 1;
point = next;
}
// Draw points and labels
for(var graph in this.graphs) {
var filtered_points = points.filter(function(el) { return el.graph == graph; });
for(var point = 0; point < filtered_points.length; point++) {
element = this.createElement('circle', {'class': 'point', 'id': 'point_'+filtered_points[point].id, 'cx': filtered_points[point].x, 'cy': filtered_points[point].y, 'r': 4, 'fill': '#333', 'stroke': this.graphs[graph], 'stroke-width': 2});
this.g.insertBefore(element, this.g.querySelectorAll('.label')[0]);
if(filtered_points[point].click !== false) {
element.onclick = filtered_points[point].click;
}
element.addEventListener('mouseover', function() {
this.setAttribute('r', '6');
obj.holder.getElementById(this.getAttribute('id').replace('point', 'label')).setAttribute('display', 'block');
});
if(filtered_points[point].label !== '') {
var g = this.createElement('g', { 'class': 'label', 'id': 'label_'+filtered_points[point].id, 'transform': 'translate(0, ' + this.parent_holder.offsetHeight + ') scale(1, -1)'});
this.g.appendChild(g);
g.addEventListener('mouseover', function() {
obj.holder.getElementById(this.getAttribute('id').replace('label', 'point')).setAttribute('r', '6');
this.setAttribute('display', 'block');
});
element = this.createElement('text', {});
var text = filtered_points[point].label.replace('</sup>', '<sup>').split('<sup>');
for(var i = 0; i < text.length; i++) {
text[i] = text[i].replace(/(<([^>]+)>)/ig,"").replace('%y', this.raw_points[filtered_points[point].id].y).replace('%x', this.raw_points[filtered_points[point].id].x);
if(i % 2 == 0) {
element.appendChild(document.createTextNode(text[i]));
}
else {
var tmp = this.createElement('tspan', {'dy': '-5'});
tmp.appendChild(document.createTextNode(text[i]));
element.appendChild(tmp);
}
}
path = this.createElement('path', {'stroke': 'black', 'stroke-width': 2, 'fill': 'white', 'opacity': 0.5});
// Append here to have them with the good z-index, update their attributes later
g.appendChild(path);
g.appendChild(element);
var x_text = filtered_points[point].x - element.getBoundingClientRect().width / 2;
var y_text = this.parent_holder.offsetHeight - filtered_points[point].y - this.marginTop - this.marginBottom;
var element_width = element.getBoundingClientRect().width;
var element_height = element.getBoundingClientRect().height;
if(filtered_points[point].x - element.getBoundingClientRect().width / 2 < 0) {
x_text = filtered_points[point].x + this.marginLeft + this.marginRight;
y_text = this.parent_holder.offsetHeight - filtered_points[point].y + 5;
path.setAttribute('d', 'M '+(x_text - 5)+' '+(y_text + 5)+' L '+(x_text - 5)+' '+(y_text - element_height/2 + 7.5)+' L '+(x_text - 10)+' '+(y_text - element_height/2 + 5)+' L '+(x_text - 5)+' '+(y_text - element_height/2 + 2.5)+' L '+(x_text - 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text + 5)+' Z');
}
else if(filtered_points[point].y + element.getBoundingClientRect().height + this.marginBottom + 2 > this.parent_holder.offsetHeight) {
x_text = filtered_points[point].x + this.marginLeft + this.marginRight;
y_text = this.parent_holder.offsetHeight - filtered_points[point].y + 5;
path.setAttribute('d', 'M '+(x_text - 5)+' '+(y_text + 5)+' L '+(x_text - 5)+' '+(y_text - element_height/2 + 7.5)+' L '+(x_text - this.marginBottom)+' '+(y_text - element_height/2 + 5)+' L '+(x_text - 5)+' '+(y_text - element_height/2 + 2.5)+' L '+(x_text - 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text + 5)+' Z');
if(x_text + element_width > this.parent_holder.offsetWidth) {
x_text = filtered_points[point].x - element_width - this.marginLeft - this.marginRight;
y_text = this.parent_holder.offsetHeight - filtered_points[point].y + 5;
path.setAttribute('d', 'M '+(x_text - 5)+' '+(y_text + 5)+' L '+(x_text - 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height/2 + 2.5)+' L '+(x_text + element_width + 10)+' '+(y_text - element_height/2 + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height/2 + 7.5)+' L '+(x_text + element_width + 5)+' '+(y_text + 5)+' Z');
}
}
else if(filtered_points[point].x + element_width / 2 + this.marginLeft + 2 > this.parent_holder.offsetWidth) {
x_text = filtered_points[point].x - element_width - this.marginLeft - this.marginRight;
y_text = this.parent_holder.offsetHeight - filtered_points[point].y + 5;
path.setAttribute('d', 'M '+(x_text - 5)+' '+(y_text + 5)+' L '+(x_text - 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height/2 + 2.5)+' L '+(x_text + element_width + 10)+' '+(y_text - element_height/2 + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height/2 + 7.5)+' L '+(x_text + element_width + 5)+' '+(y_text + 5)+' Z');
}
else {
path.setAttribute('d', 'M '+(x_text - 5)+' '+(y_text + 5)+' L '+(x_text - 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text - element_height + 5)+' L '+(x_text + element_width + 5)+' '+(y_text + 5)+' L '+(x_text + element_width/2 + 2.5)+' '+(y_text + 5)+' L '+(x_text + element_width/2)+' '+(y_text + 10)+' L '+(x_text + element_width/2 - 2.5)+' '+(y_text + 5)+' Z');
}
element.setAttribute('x', x_text);
element.setAttribute('y', y_text);
g.setAttribute('display', 'none');
}
}
}
};
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