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projviz.js
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projviz.js
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Projviz = function(initializer, paper) {
var params = Projviz.init(initializer);
if (! paper) {
paper = params.elementId
? Raphael(document.getElementById(params.elementId), params.width, params.height)
: Raphael(0, 0, params.width, params.height);
}
Projviz.render(params, paper);
}
Projviz.mondayBefore = function(date) {
var d = new Date(date.getTime());
d.setDate(d.getDate() - (d.getDay() - 1) % 7);
return d;
}
Projviz.mondayAfter = function(date) {
var d = new Date(date.getTime());
d.setDate(d.getDate() + (8 - d.getDay()) % 7);
return d;
}
Projviz.DAY_MILLIS = 1000 * 60 * 60 * 24;
Projviz.WEEK_MILLIS = Projviz.DAY_MILLIS * 7;
Projviz.init = function(initializer) {
function isWorkingDay(date) {
var day = date.getDay();
return day >= 1 && day <= 5;
}
function nextWorkingDay(date) {
var d = new Date(date.getTime());
while (! isWorkingDay(d)) {
d.setDate(d.getDate() + 1);
}
return d;
}
function Task(name) {
this.name = name || "";
this.assignee = "";
this.starting = new Date();
this.starting.setHours(0);
this.starting.setMinutes(0);
this.starting.setSeconds(0);
this.starting.setMilliseconds(0);
this.duration = 1;
// ending date calculation (skips non-working days)
var ending = null;
this.ending = function() {
if (ending === null) {
ending = new Date(this.starting.getTime());
for (var i = 0; i < this.duration; i++) {
ending = nextWorkingDay(ending);
ending.setDate(ending.getDate() + 1);
}
}
return ending;
}
}
function Config() {
var current = null;
this.title = "";
this.tasks = [];
this.task = function(name) {
var previous = current;
current = new Task(name);
if (previous != null) {
current.starting = previous.ending();
current.assignee = previous.assignee;
}
this.tasks.push(current);
return this;
}
this.assignee = function(name) {
current.assignee = name;
return this;
}
this.starting = function(y, m, d) {
// skips non-working days
current.starting = nextWorkingDay(new Date(y, m - 1, d, 0, 0, 0, 0));
return this;
}
this.duration = function(d) {
current.duration = d;
return this;
}
}
var config = new Config();
initializer(config);
if (config.tasks.length === 0) return;
var params = {};
params.title = config.title || "";
params.tasks = config.tasks;
params.elementId = config.elementId || null;
params.width = config.width || 800;
params.height = config.height || 600;
params.titleFontSize = config.titleFontSize || 16;
params.labelFontSize = config.labelFontSize || 10;
params.leftMargin = config.leftMargin || 20;
params.rightMargin = config.rightMargin || 20;
params.middlePadding = config.middlePadding || 50;// TODO make this automatic
params.topPadding = config.topPadding || 20;
params.diamondSize = config.diamondSize || 3;
params.showDayMarkers = config.showDayMarkers || true;
params.colors = config.colors || ["0-#090-#eee", "0-#00c-#eee", "0-#c00-#eee"]
// determine first and last dates
params.firstDate = params.tasks[0].starting;
params.lastDate = params.tasks[0].ending();
for (var i = 1; i < params.tasks.length; i++) {
var t = params.tasks[i];
if (t.starting < params.firstDate) {
params.firstDate = t.starting;
}
if (t.ending() > params.lastDate) {
params.lastDate = t.ending();
}
}
// determine week count
var d1 = Projviz.mondayBefore(params.firstDate);
var d2 = Projviz.mondayAfter(params.lastDate);
params.weekCount = Math.floor((d2.getTime() - d1.getTime()) / Projviz.WEEK_MILLIS);
return params;
}
Projviz.render = function(p, paper) {
function text(x, y, text, fontSize, anchor) {
anchor = anchor || "start";
var t = paper.text(x, y, text);
t.attr({
"font-family": "Verdana, Geneva, sans-serif",
"font-size": fontSize,
"text-anchor": anchor
});
return t;
}
function line(x1, y1, x2, y2) {
return paper.path(["M", x1, y1, "L", x2, y2, "z"].join(" "));
}
function diamond(x, y, size) {
var path = paper.path(["M", x - size, y,
"L", x, y - size,
"L", x + size, y,
"L", x, y + size,
"z"].join(" "));
path.attr({"fill": "black"});
return path;
}
function dd(n) {
return n < 10 ? "0" + n : n;
}
// fill background
paper.rect(0, 0, p.width, p.height).attr({"stroke": "white", "fill": "white"});
// draw title
var title = text(p.leftMargin, p.topPadding, p.title, p.titleFontSize);
var titleBounds = title.getBBox();
// draw timeline
var timelineX = titleBounds.x + titleBounds.width + p.middlePadding;
var timelineY = titleBounds.y + (4 * titleBounds.height / 5);
var timelineW = Math.floor((p.width - timelineX - p.rightMargin) / (p.weekCount * 7)) * p.weekCount * 7;
line(timelineX, timelineY, timelineX + timelineW, timelineY);
// draw markers
var weekLength = timelineW / p.weekCount;
var dayLength = weekLength / 7;
var d = Projviz.mondayBefore(p.firstDate);
for (var i = 0; i < p.weekCount + 1; i++) {
// draw week marker
diamond(timelineX + (i * weekLength), timelineY, p.diamondSize);
var dateLabelText = [dd(d.getDate()), "/", dd(d.getMonth() + 1)].join("");
var dateLabel = text(timelineX + (i * weekLength), timelineY - p.labelFontSize, dateLabelText, p.labelFontSize, "middle");
d.setDate(d.getDate() + 7);
// draw day markers
if (p.showDayMarkers && i < p.weekCount) {
for (var j = 1; j < 7; j++) {
var dayMarkerX = timelineX + (i * weekLength) + (j * dayLength);
var dayMarker = line(dayMarkerX, timelineY - 1, dayMarkerX, timelineY - 3 * p.diamondSize / 4);
dayMarker.attr({"stroke": "#888"});
}
}
}
// sort tasks by assignee position, then by starting date
var assignees = {};
var assigneeCount = 0;
for (var i = 0; i < p.tasks.length; i++) {
var obj = assignees[p.tasks[i].assignee];
if (! obj) {
assignees[p.tasks[i].assignee] = {order: assigneeCount, color: null};
assigneeCount++;
}
}
p.tasks.sort(function(a, b) {
var cmp = assignees[a.assignee].order - assignees[b.assignee].order;
if (cmp === 0) {
cmp = a.starting.getTime() - b.starting.getTime();
}
return cmp;
});
// use assignee name ordering to ensure consistent colours
var assigneeNames = [];
for (var assignee in assignees) {
if (assignees.hasOwnProperty(assignee)) {
assigneeNames.push(assignee);
}
}
assigneeNames.sort();
for (var i = 0; i < assigneeNames.length; i++) {
assignees[assigneeNames[i]].color = p.colors[i % p.colors.length];
}
// draw tasks
var yPos = timelineY + 4 * p.labelFontSize;
var allLabels = [];
var allDottedLines = [];
for (var i = 0; i < p.tasks.length; i++) {
var task = p.tasks[i];
var startDayIndex = Math.floor((task.starting - Projviz.mondayBefore(p.firstDate)) / Projviz.DAY_MILLIS);
var x = timelineX + (dayLength * startDayIndex);
var w = dayLength * ((task.ending() - task.starting) / Projviz.DAY_MILLIS);
var labelLineCount = task.name ? task.name.split("\n").length : 0;
if (task.name) {
var label = text(x + (p.labelFontSize / 2), yPos, task.name, p.labelFontSize);
allLabels.push(label);
var labelBounds = label.getBBox();
label.backing = paper.rect(labelBounds.x, labelBounds.y, labelBounds.width, labelBounds.height);
label.backing.attr({"stroke": "white", "fill": "white"});
yPos = labelBounds.y + labelBounds.height + (p.labelFontSize / 3);
}
// combine dotted line extents
var dottedLineExtent = allDottedLines[x];
if (! dottedLineExtent) {
dottedLineExtent = yPos;
allDottedLines[x] = yPos;
}
if (dottedLineExtent < yPos) {
allDottedLines[x] = yPos;
}
var taskRect = paper.rect(x, yPos, w, p.labelFontSize);
taskRect.attr({"stroke": "white", "fill": assignees[task.assignee].color});
yPos += p.labelFontSize * (1 + labelLineCount)
}
// draw dotted lines
for (var dottedLineX in allDottedLines) {
if (allDottedLines.hasOwnProperty(dottedLineX)) {
var dottedLineExtent = allDottedLines[dottedLineX];
var dottedLine = line(dottedLineX, timelineY, dottedLineX, dottedLineExtent);
dottedLine.attr({"stroke-dasharray": ". "});
}
}
// bring labels to the front
for (var i = 0; i < allLabels.length; i++) {
allLabels[i].backing.toFront();
allLabels[i].toFront();
}
}