I am implementing a calendar widget using this Gantt chart Dimitry Kudryavtsev developed using d3. I have campaigns - which will be tasks in this case. I need to present a timeline of events based on calendar view/dates.
I wanted a solution to avoid tasks that fall on the same time line from overlapping. How can we do it?
For example in present implementation tasks overlap as expected:
(a) (b)
|------[----|----]
I want it in this way
(a)
|---------|
. .. . . [-------] (b)
Official example here
We will have to modify the d3 gantt code
/**
* @author Dimitry Kudrayvtsev
* @version 2.0
*/
d3.gantt = function() {
var FIT_TIME_DOMAIN_MODE = "fit";
var FIXED_TIME_DOMAIN_MODE = "fixed";
var margin = {
top : 20,
right : 40,
bottom : 20,
left : 150
};
var timeDomainStart = d3.time.day.offset(new Date(),-3);
var timeDomainEnd = d3.time.hour.offset(new Date(),+3);
var timeDomainMode = FIT_TIME_DOMAIN_MODE;// fixed or fit
var taskTypes = [];
var taskStatus = [];
var height = document.body.clientHeight - margin.top - margin.bottom-5;
var width = document.body.clientWidth - margin.right - margin.left-5;
var tickFormat = "%H:%M";
var keyFunction = function(d) {
return d.startDate + d.taskName + d.endDate;
};
var rectTransform = function(d) {
return "translate(" + x(d.startDate) + "," + y(d.taskName) + ")";
};
var x = d3.time.scale().domain([ timeDomainStart, timeDomainEnd ]).range([ 0, width ]).clamp(true);
var y = d3.scale.ordinal().domain(taskTypes).rangeRoundBands([ 0, height - margin.top - margin.bottom ], .1);
var xAxis = d3.svg.axis().scale(x).orient("bottom").tickFormat(d3.time.format(tickFormat)).tickSubdivide(true)
.tickSize(8).tickPadding(8);
var yAxis = d3.svg.axis().scale(y).orient("left").tickSize(0);
var initTimeDomain = function() {
if (timeDomainMode === FIT_TIME_DOMAIN_MODE) {
if (tasks === undefined || tasks.length < 1) {
timeDomainStart = d3.time.day.offset(new Date(), -3);
timeDomainEnd = d3.time.hour.offset(new Date(), +3);
return;
}
tasks.sort(function(a, b) {
return a.endDate - b.endDate;
});
timeDomainEnd = tasks[tasks.length - 1].endDate;
tasks.sort(function(a, b) {
return a.startDate - b.startDate;
});
timeDomainStart = tasks[0].startDate;
}
};
var initAxis = function() {
x = d3.time.scale().domain([ timeDomainStart, timeDomainEnd ]).range([ 0, width ]).clamp(true);
y = d3.scale.ordinal().domain(taskTypes).rangeRoundBands([ 0, height - margin.top - margin.bottom ], .1);
xAxis = d3.svg.axis().scale(x).orient("bottom").tickFormat(d3.time.format(tickFormat)).tickSubdivide(true)
.tickSize(8).tickPadding(8);
yAxis = d3.svg.axis().scale(y).orient("left").tickSize(0);
};
function gantt(tasks) {
initTimeDomain();
initAxis();
var svg = d3.select("body")
.append("svg")
.attr("class", "chart")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("class", "gantt-chart")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.attr("transform", "translate(" + margin.left + ", " + margin.top + ")");
svg.selectAll(".chart")
.data(tasks, keyFunction).enter()
.append("rect")
.attr("rx", 5)
.attr("ry", 5)
.attr("class", function(d){
if(taskStatus[d.status] == null){ return "bar";}
return taskStatus[d.status];
})
.attr("y", 0)
.attr("transform", rectTransform)
.attr("height", function(d) { return y.rangeBand(); })
.attr("width", function(d) {
return (x(d.endDate) - x(d.startDate));
});
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0, " + (height - margin.top - margin.bottom) + ")")
.transition()
.call(xAxis);
svg.append("g").attr("class", "y axis").transition().call(yAxis);
return gantt;
};
gantt.redraw = function(tasks) {
initTimeDomain();
initAxis();
var svg = d3.select("svg");
var ganttChartGroup = svg.select(".gantt-chart");
var rect = ganttChartGroup.selectAll("rect").data(tasks, keyFunction);
rect.enter()
.insert("rect",":first-child")
.attr("rx", 5)
.attr("ry", 5)
.attr("class", function(d){
if(taskStatus[d.status] == null){ return "bar";}
return taskStatus[d.status];
})
.transition()
.attr("y", 0)
.attr("transform", rectTransform)
.attr("height", function(d) { return y.rangeBand(); })
.attr("width", function(d) {
return (x(d.endDate) - x(d.startDate));
});
rect.transition()
.attr("transform", rectTransform)
.attr("height", function(d) { return y.rangeBand(); })
.attr("width", function(d) {
return (x(d.endDate) - x(d.startDate));
});
rect.exit().remove();
svg.select(".x").transition().call(xAxis);
svg.select(".y").transition().call(yAxis);
return gantt;
};
gantt.margin = function(value) {
if (!arguments.length)
return margin;
margin = value;
return gantt;
};
gantt.timeDomain = function(value) {
if (!arguments.length)
return [ timeDomainStart, timeDomainEnd ];
timeDomainStart = +value[0], timeDomainEnd = +value[1];
return gantt;
};
/**
* @param {string}
* vale The value can be "fit" - the domain fits the data or
* "fixed" - fixed domain.
*/
gantt.timeDomainMode = function(value) {
if (!arguments.length)
return timeDomainMode;
timeDomainMode = value;
return gantt;
};
gantt.taskTypes = function(value) {
if (!arguments.length)
return taskTypes;
taskTypes = value;
return gantt;
};
gantt.taskStatus = function(value) {
if (!arguments.length)
return taskStatus;
taskStatus = value;
return gantt;
};
gantt.width = function(value) {
if (!arguments.length)
return width;
width = +value;
return gantt;
};
gantt.height = function(value) {
if (!arguments.length)
return height;
height = +value;
return gantt;
};
gantt.tickFormat = function(value) {
if (!arguments.length)
return tickFormat;
tickFormat = value;
return gantt;
};
return gantt;
};
We pass this data to that code:
var tasks = [
{"startDate":new Date("Sun Dec 08 04:36:45 EST 2012"),"endDate":new Date("Sun Dec 09 02:36:45 EST 2012"),"taskName":"E Job","status":"RUNNING"},
{"startDate":new Date("Sun Dec 07 01:36:45 EST 2012"),"endDate":new Date("Sun Dec 09 02:36:45 EST 2012"),"taskName":"E Job","status":"FAILED"}];
var taskStatus = {
"SUCCEEDED" : "bar",
"FAILED" : "bar-failed",
"RUNNING" : "bar-running",
"KILLED" : "bar-killed"
};
var taskNames = [ "D Job", "P Job", "E Job", "A Job", "N Job" ];
I don't need to show y-axis data, so we can play around with that axis - we can hide those ticks. (Y axis data is not important for me, we can do the tricks on it)
