var table_selection = d3.select('#timeline_example_table');
var timelines = [];
This example also demonstrates a mechanism of dynamically adding charts to a table instead of attaching to already existing div elements in the DOM.
var table_selection = d3.select('#timeline_example_table');
var timelines = [];
The time scale that will be shared among all charts in this example.
var time_scale = d3.time.scale().domain([new Date(2014, 6, 1), new Date(2014, 7, 1)]);
Create a month’s worth of daily sample random data for this timeline.
type TimelineDatum = { date: Date, num: number }
var timeline_data: TimelineDatum[] = [];
for (let day = 1; day <= 30; day++)
timeline_data.push({
date: new Date(2014, 6, day, Math.random() * 24),
num: Math.round(Math.random() * 10),
});
Append two example rows in the table and attach a new c3.Plot.horiz_zoom
to each one.
Note that .node()
is called on the D3 selection to pass in the actual DOM node element as the anchor.
for (let row_color of ['darkred', 'darkblue']) {
let row = table_selection.append('tr');
row.append('td').text(row_color)
.style('font-weight', 'bold')
.style('background-color', 'lightgray')
.style('text-align', 'center');
timelines.push( new c3.Plot.Zoomable<TimelineDatum>({
anchor: <HTMLElement>row.append('td').append('div').node(),
width: '100%',
zoomable: 'h',
Create a month’s worth of daily sample random data for this timeline.
data: timeline_data,
Setup the user **scales ** for the plot.The horizontal scale will be the time scale we created
above and the vertical scale will go from 0- 11 to accomodate the random num
values.
h: time_scale,
v: d3.scale.linear().domain([0, 11]),
accessor functions to get the x and y values of the data points.
x: (d) => d.date,
y: (d) => d.num,
The maximum zoom factor that the user is allowed to zoom in. The user cannot zoom out more than the original defined domain.
zoom_extent: 16,
Add an **axis ** so that grid lines are drawn, but not the scale itself.
axes: [
new c3.Axis.X({
grid: true,
ticks: false,
axis_size: 0,
}),
],
**Color ** this chart based on the example color for this row
content_options: {
styles: {
'stroke': row_color,
'fill': row_color,
},
},
Add line
layer.
The r
option will create a circle at each data point.
The label_options.text
will provide a text label for each data point circle.
layers: [
new c3.Plot.Layer.Line<TimelineDatum>({
interpolate: 'cardinal',
r: 12, // radius for circles at datapoints
label_options: {
text: (d) => d.num,
styles: {
'fill': 'white',
'stroke': 'none',
'font-weight': 'bold',
},
},
}),
],
}));
}
Create an additional row in the table for the time scale
var row = table_selection.append('tr');
row.append('td').text("Time")
.style('font-weight', 'bold')
.style('background-color', 'lightgray')
.style('text-align', 'center');
Create a c3.Axis.x
**axis **. c3 axis objects may be created independently from
plots for increased flexibility in layout options
var timeline_axis_example = new c3.Axis.X({
anchor: <HTMLElement>row.append('td').node(),
scale: time_scale,
height: 30,
tick_count: 4,
});
Setup event handlers so zooming in one of the timeline charts will zoom the other timeline charts.
timelines.forEach((timeline) => {
timeline.on('zoom', (extent) => {
for (let other_timeline of timelines.filter((t) => t !== timeline))
other_timeline.focus(extent);
timeline_axis_example.redraw()
});
});
Resize the timelines to fit the window
window.onresize = function () {
for (let timeline of timelines)
timeline.resize();
timeline_axis_example.resize();
}
Perform the initial rendering of the charts and add them to the global examples array.
for (let timeline of timelines)
timeline.render();
timeline_axis_example.render();