How do I add a button with event listener in dc.js data table in a new column.
I basically want to add custom html if possible.
Adding the button is simply a matter of returning the html for the column for
dc.dataTable (dom)
.columns ([function (d) { return "<button>Clickedy click</button>" }])
.on('renderlet', function (graph) {
graph.selectAll('button')
.on('click.clickedy',function(d){
console.log(d);
})
'renderlet' or 'pretransition' for the event, don't think it matters much in this case
Related
I love the DC.JS library and have been trying to create a clickable aggregated table in DC.js with partial success. I want to highlight the rows on click event(multiple selections allowed) similar to the row chart or an ordinal bar chart in dc js. Like a row chart, when multiple selections are made, multiple table rows should be highlighted.
I am not able to select the row that I have clicked on, rather, my css selects the first row irrespective of which row I click. I tried to use 'this' keyword to select the current row that was clicked but to no avail.
Here's the js fiddle: https://jsfiddle.net/yashnigam/kvt9xnbs/83/
Here's my code for the click event that makes the css selection:
marketTable.on("renderlet", function(chart){
chart.selectAll('tr.dc-table-row').on('click',function(d){
if(filterKeys.includes(d.key)){
chart.select('tr.dc-table-row').datum(d.key).style('background-color','gray');
}
})
});
Kindly share a way to highlight rows of data table on click, the same way it works on a row chart.
#Hassan has the right idea. I would suggest selecting the trs rather than the tds, and instead of changing the classes on click (which wouldn't survive a redraw), apply the classes also during the pretransition event.
So:
tr.dc-table-row.sel-rows {
background-color: lightblue;
}
marketTable.on('pretransition', function (table) {
table.selectAll('td.dc-table-column')
.on('click', /* ... */)
table.selectAll('tr.dc-table-row')
.classed('sel-rows', d => filterKeys.indexOf(d.key) !== -1)
});
We apply the class based on whether the row's key is in the array. Straightforward and simple!
Fork of your fiddle.
using built-in filters
#vbernal pointed out that the list doesn't get reset when you click the reset link. To better integrate this, we can hook into the built-in filters that the table inherits from the base mixin (but doesn't ordinarily use):
marketTable.on('pretransition', function (table) {
table.selectAll('td.dc-table-column')
.on('click',function(d){
let filters = table.filters().slice();
if(filters.indexOf(d.key)===-1)
filters.push(d.key);
else
filters = filters.filter(k => k != d.key);
table.replaceFilter([filters]);
dc.redrawAll();
});
let filters = table.filters();
table.selectAll('tr.dc-table-row')
.classed('sel-rows', d => filters.indexOf(d.key) !== -1);
});
Instead of setting dimension.filter() ourselves, we fetch the existing table.filters(), toggle as needed, and then set the filters using
table.replaceFilter([filters])
(Note the extra brackets.)
When the reset link is clicked, we reset the filter on the table rather than the crossfilter dimension. (It's always better to manipulate filters through the chart, because charts are not able to read the selection state from the crossfilter dimension.)
$('#resetTable').on('click', function() {
marketTable.filter(null);
dc.redrawAll();
});
New version of fiddle.
In your onclick event, add (toggle) a class similar .sel-rows to clicked item (instead of change back color of it). Now in your css add this:
.sel-rows td{
background-color: gray;
}
Background color for table rows not work in some browsers.
As I said before, the changes that you (#Gordon) indicated worked, when I click the button, the table is redefined without any kind of color.
However, the problem was inversed, now the numbers remain the same.
I mixed it with the code you created and the solution I found was as follows:
marketTable.on('pretransition', function(table) {
table.selectAll('td.dc-table-column')
.on('click', function(d) {
let filters = table.filters().slice();
if (filters.indexOf(d.key) === -1)
filters.push(d.key);
else
filters = filters.filter(k => k != d.key);
if (filters.length === 0)
marketDim.filter(null);
else
marketDim.filterFunction(function(d) {
return filters.indexOf(d) !== -1;
})
table.replaceFilter([filters]);
dc.redrawAll();
});
let filters = table.filters();
table.selectAll('tr.dc-table-row')
.classed('sel-rows', d => filters.indexOf(d.key) !== -1);
});
$('#reset').on('click', function() {
marketTable.filter(null);
marketDim.filter(null)
vendorDim.filter(null)
CategoryDim.filter(null)
dc.redrawAll();
});
$('#resetTable').on('click', function() {
marketTable.filter(null);
marketDim.filter(null)
dc.redrawAll();
});
I don't know if it's the most elegant way to do this, I'm still a beginner in D3, DC and Crossfilter
I have seen https://www.amcharts.com/docs/v4/concepts/event-listeners/ and
https://www.amcharts.com/docs/v4/reference/categoryaxis/#Events
categoryAxis.events.on('hit', function (ev) {
console.log('clicked on ', ev.target)
}, this)
works. However, this returns the complete CategoryAxis. I would like to distinguish on which catgeory the user clicked.
e.g. categoryAxis.category.template.events.on('hit', function (ev) does not exist.
You need to add the hit event listener on the axis renderer's label template in order to capture the category label that was clicked:
categoryAxis.renderer.labels.template.events.on('hit', function(ev) {
alert(ev.target.dataItem.category)
})
I am using composite charts to see the unfiltered data, but I want to hide sometimes the unfiltered data and make the 'y' axis elastic. Hiding the unfiltered data wasn't hard, just an event listener on chart, but I can't make possible the elasticity on 'y' axis, when the unfiltered data is hidden. Perhaps it's not even possible in a case like this. Any ideas?
chart.select('.unfiltered_data').on('change', function() {
if(!this.checked) {
console.log("Stop showing unfiltered data!")
chart.select('.sub._0')
.attr('visibility', 'hidden')
// chart.elasticY(true)
chart.redraw()
}
else {
console.log("Show unfiltered data!")
chart.select('.sub._0')
.attr('visibility', 'visible')
// chart.elasticY(false)
chart.redraw()
}
})
There is (almost) always a way to do it in dc.js, because dc.js is a leaky abstraction by design!
First I tried to change which child charts are included in each composite chart, but that wasn't the right approach because a composite chart's children can't be changed on a redraw, only on a render. And we want to animate when switching between showing the unfiltered and not showing.
So instead I thought we could
use your visibility idea
turn off elasticY when the unfiltered is hidden, and
use the filtered child chart's domain instead
So I added a checkbox
<label><input type="checkbox" id="unfiltered" name="unfiltered" checked> Show Unfiltered</label>
and a global variable
var show_unfiltered = true;
The handler looks like this:
function ydomain_from_child1(chart) {
chart.y().domain([0, chart.children()[1].yAxisMax()]);
chart.resizing(true);
}
d3.select('#unfiltered').on('change', function() {
show_unfiltered = this.checked;
charts.forEach(chart => {
chart.select('.sub._0').attr('visibility', show_unfiltered ? 'visible' : 'hidden');
chart.elasticY(show_unfiltered);
if(!show_unfiltered) {
ydomain_from_child1(chart);
chart.children()[1].colors(d3.schemeCategory10);
chart.on('preRedraw.hide-unfiltered', ydomain_from_child1);
}
else {
chart.children()[1].colors('red');
chart.on('preRedraw.hide-unfiltered', null);
}
})
dc.redrawAll();
});
Whenever the checkbox is toggled, we turn on or off elasticY based on the setting. When the unfiltered are not shown, we'll simulate elasticY with a preRedraw handler which determines the domain from the second (filtered) child chart.
Additionally, we turn on/off the red color scheme for the filtered chart based on the checkbox.
I have added this to the compare unfiltered example.
I found I had to make one more change: the filtered chart was hidden when there were no filters. So I had to disable this hiding if the unfiltered was unchecked:
var any_filters = !show_unfiltered || charts.some(chart => chart.filters().length);
chart.select('.sub._1')
.attr('visibility', any_filters ? 'visible' : 'hidden')
I am trying to realize a dashboard to display basic data.
I am actually completely stuck on an issue. Strangely enough, I couldn't find anything even similar to it online, so I don't have many leads on how to move forward.
I have mainly two charts:
a lineChart called "stackChart" that
displays consumption as a base layer with its valueAccessor function
dispalys production as a stacked layer with its value Accessor function
a barChart called "volumeChart" that is simply the rangeChart for the lineChart
I use radio buttons to select whether to aggregate the grouped data by sum or by average (using the same approach as this example) and then I just use:
stackChart.valueAccessor(/*function with new value (avg or sum)*/);
dc.redrawAll();
to refresh the base layer (consumption).
What I don't manage to do is to refresh the "stacked layer" by updating its valueAccessor! I can't find any way to access its valueAccessor (or, worst case, just completely remove the stacked layer and then add a new refreshed stacked layer using just ".stack(...)").
Here is the respective part of my code where the chart is built:
// Charts customization #js
stackChart
.renderArea(true)
.height(350)
.transitionDuration(1500)
.dimension(dateDim)
.group(powByTime, "Consumption")
// BASE LAYER valueAccessor HERE
.valueAccessor(function(d) { return d.value.conSum; })
.x(d3.time.scale().domain([minDate, maxDate]))
.xUnits(d3.time.days)
.elasticY(true)
.renderHorizontalGridLines(true)
.legend(dc.legend().x(80).y(0).itemHeight(13).gap(5))
.brushOn(false)
// STACKED LAYER HERE
.stack(powByTime, "Production", function(d) { return d.value.prodSum; })
.rangeChart(volumeChart)
.controlsUseVisibility(true)
;
And here is where I look for changes in the radio buttons and re-draw the layers:
// Listen for changes
d3.selectAll('#select-operation input')
.on('click', function() {
var aggrMode = this.value; // fetch "avg" or "sum" from buttons
// UPDATE BASE LAYER HERE:
stackChart.valueAccessor(function(d) { var sel = accessors[aggrMode]['consPow']; return d.value[sel]; });
// ???HOW TO UPDATE STACKED LAYER valueAccessor function???
//stackChart.stack.valueAccessor(function(d) { var sel = accessors[aggrMode]['prodPow']; return d.value[sel]; });
dc.redrawAll();
});
If you need more details on what I am trying to do and full code you can check here.
As a reference, here is what it looks like:
I don't really know dc.js, but it may be possible that you can't change an accessor once it's been set. Try writing a single function for your accessor that will return either the sum or the average, depending on the state of some variable that you can set.
#Ryan's solution will probably work fine (and may be a better design), but here's the lowdown on the dc.js API with respect to stacking, in case you need it.
As described in this issue the group and stack API is pretty weird. It grew organically, in a backward-compatible way, so both the stacks and the value accessors on top of the stacks sort of branch out in a beautiful fractal of... well, no it's pretty messy.
But the issue also suggests the solution for your problem. Since chart.group() resets the set of stacks, just go ahead and build them all from scratch in your event handler:
stackChart.group(powByTime, "Consumption") // this resets the stacks
.valueAccessor(function(d) { var sel = accessors[aggrMode]['consPow']; return d.value[sel]; })
.stack(powByTime, "Production", function(d) { var sel = accessors[aggrMode]['prodPow']; return d.value[sel]; });
Internally it's just emptying an array of layers/stacks and then populating it with some references.
This is quite efficient since dc.js doesn't store your data except where it is bound to the DOM elements. So it is the same amount of work to redraw using the old group and value accessor as it is to redraw using new ones.
I want to remove stream style (state ? ("Stream", "Stacked" and "Expanded")) on stacked area chart and use this code :
d3.selectAll("g.nv-series")
.filter(function() {
return d3.select(this).select("text").text() == "Stream";
})
.remove();
But it works only the first time.
I tryed to handle events on chart because i want to refresh rendering of chart but it didn't work for the styles click. It works only for the legend click.
chart.legend.dispatch.on('legendClick', function(e){
console.log('legend was clicked', 'no namespace.');
});
How i can i handle click on style event ?
setter
chart.style('stream');
getter
chart.dispatch.on('stateChange', function(e) {
console.log(e); //e.style holds the current style
});
List of available styles can be found here https://github.com/novus/nvd3/blob/master/src/models/stackedArea.js#L299-L318
I also had hard time with this issue so I hope this would help you.
Cheers!