I'm using d3 v4 and trying to apply a style to an element on mouseover.
I'm wondering if it's an API change with V4 but I can't seem to get at the node
I have code:
.on('mouseover', () => {
let self = d3.select(this);
let c = self.attr('class');
but this gives an error
Cannot read property 'getAttribute' of null
So the d3.select() doesn't seem to work...
The mouseover IS firing however.
I can use
.on('mouseover', (elem) => {
console.log('elem', elem);
Which will give me some type of D3 object, but not a DOM node.
I can't use any D3 methods on this object
elem.classed("hilite", true);
elem.attr("class", "hilite");
Neither of those methods exist on a d3 returned object.
So how do I do this super basic operation in d3?
related to
Change class of one element when hover over another element d3
You can use arrow functions (if this an arrow function), if you don't need access to this of the current element. In this case you do need, because D3 calls event handlers setting this to the element triggering this event.
See: Using arrow functions with d3
Related
I am trying to reset after choosing some of the individual's bar.
index.html: (line no. 62)
<span>
reset
</span>
This seems not to work. I was able to reset all the graphs pie chart, line chart, etc but not this one.
Those two ordinal graphs are created in index.js like this:
var focus = new dc.barChart('#focus');
var range = new dc.barChart('#range');
https://blockbuilder.org/ninjakx/483fd69328694c6b6125bb43b9f7f8a7
Update:
It looks weird now Coz it's showing a single bar and all the bar have got invisible but I want them to be visible (in gray colour) but not clickable.
This example replaces the built-in filtering functionality of the bar chart with its own implementation of ordinal selection, because the chart has a linear scale.
The example uses a global variable focusFilter to store the current selection. We need to empty this out and we also need to update the dimension filter as the original filterAll would do, pulling that code out of the click handler:
focus.applyFilter = function() { // non-standard method
if(focusFilter.length)
this.dimension().filterFunction(function(k) {
return focusFilter.includes(k);
});
else this.dimension().filter(null);
};
focus.filterAll = function() {
focusFilter = [];
this.applyFilter();
};
This will also allow dc.filterAll() to work, for a "reset all" link.
Fork of your block.
For some reason, I could not get the original
reset
links to work at all in this block, so I replaced them with the equivalent D3 click handlers:
d3.select('#reset-focus').on('click', () => {
focus.filterAll();
dc.redrawAll();
})
d3.select('#reset-all').on('click', () => {
dc.filterAll();
dc.redrawAll();
})
I also updated the focus ordinal bar example. Note that automatic hiding/showing of the reset link doesn't work because the chart still has an irrelevant range filter inside of it.
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 am probably having some kind of brain damage atm because something like this should be trivial.
I got a bunch of SVG circles rendered manually (via React). I am then attaching d3 drag behavior to all of them. The drag behavior is applied, and the drag function is being executed, but when I drag one of these circles I am not able to respond accordingly because I do not know which one of them was moved. Where can I get the ID of dragged element?
I have checked a few other questions and found just some crazy filter solution... that cannot be it.
I have also peeked at docs and found the subject property.. however that one is null everywhere I tried it.
My code:
componentWillUpdate() {
let nodes = d3.selectAll("circle");
const dragFn = (d,i) => {
d3.event.sourceEvent.stopPropagation();
this.props.onNodeDrag(I_NEED_AN_ID_HERE);
}
const dragBehavior = d3.behavior.drag();
dragBehavior.on('drag', dragFn);
dragBehavior.on('dragstart', () => {
d3.event.sourceEvent.stopPropagation();
});
nodes.call(dragBehavior);
}
I don't know what your "this" is inside the function but in plain js you can get any attribute of the html element with:
d3.select(this).attr("id"); //or class etc.
or if it's wrapped
d3.select(this).select("circle").attr("id");
Here's an example: http://jsfiddle.net/a2QpA/343/
I'm trying to integrate UI5 with other libraries(namely D3) and am unable to open a UI5 Popover(or QuickView) by my controls.
The only method I can call to open the popover is .openBy(control).
According to the UI5 documentation: The Control = This is the control to which the popover will be placed. It can be not only a UI5 control, but also an existing DOM reference.
I've tried multiple things, but am unable to get the popover to open successfully. I continue to get errors in sap-ui-core.js.
Does anyone have any ideas on how to properly pass the DOM reference of my non-UI5 control?
Here is a code snippet showing what I'm trying to accomplish:
// circleClicked is the SVG element clicked on the map
function openQuickView(circleClicked) {
// quickView controls are UI5 and were created before this function
quickViewPage.setHeader(circleClicked.created_by);
// error
quickView.openBy(d3.select(circleClicked));
};
Everything you describe seems to be correct.
According to the documentation of sap.m.Popover you can also call openBy with a DOM reference as parameter.
What you are passing in your code snippet is not a DOM reference however, it is a d3 selection. To get the required DOM reference from the selection you have to add [0][0](see this answer).
function openQuickView(circleClicked) {
quickViewPage.setHeader(circleClicked.created_by);
quickView.openBy(d3.select(circleClicked)[0][0]);
};
EDIT: After playing around with the provided fiddle I found the problem.
The parameter to the function is the datum of the clicked object, not the DOM.
You should change your click handler and the function like this:
svg.selectAll("circle")
// ...
.on("click", function(d) {
openQuickView(this, d);
});
function openQuickView(circleClicked, circleData) {
quickViewPage.setHeader(circleData.created_by);
quickView.openBy(circleClicked);
}
I am using the Alloy Diagram Builder to create and display network topology.
I would like to remove default click and drag events attached to each nodes, so viewers would not have the ability "build" diagrams but only view diagrams that I have generated.
http://alloyui.com/examples/diagram-builder/real-world/
I have tried these but it does not work.
// detach click event to all nodes with class aui-diagram-node.
Y.all('.aui-diagram-node').detach("click");
// unbind
$(".aui-diagram-node").each(function(){
$(this).unbind();
});
I believe the event is attached to the container .aui-diagram-builder-drop-container via delegate() and the event would be mousedown.
Merely by accident I found a hack that might work for this. I was adding tooltips to my page on which I had a diagram builder, well apparently the tooltips layer a div over the page and simply set the opacity on it to be clear and the object still resides. After a tooltip had come up i was unable to interact with the piece of the diagram builder the tooltip had popped up over.
So based of this concept, why not try overlaying a div over the entire canvas of the diagram and give it a high z-index so that it sits on top. It should effectively not allow interaction with the canvas.
Yes it's a kludge but it just may work.
To make a DiagramBuilder read-only, you can detach() events from all of its children recursively:
/*
* Readonly the diagram
*/
function ReadonlyDiagram(diagram) {
function detachRecursively(node) {
node.get('children').each(detachRecursively);
// You may also want to set the cursor to the default since it will
// change based on which elements the mouse is over.
// node.setStyle('cursor', 'auto');
// You may want to detach specific events such as 'click' or
// 'mousedown' if you do not want to disable all events.
node.detach();
};
diagram.on('render', function (event) {
detachRecursively(diagram.get('boundingBox'));
});
}
Now, you must be post diagramBuilder object to ReadonlyDiagram function like below codes:
YUI().use('aui-diagram-builder', function (y) {
var diagram = new y.DiagramBuilder(
{
availableFields: data,
boundingBox: '#' + containerId,
fields: nodes,
srcNode: '#' + builderId
}).render();
diagram.connectAll(connections);
if (callBackDiagram !== undefined) callBackDiagram(diagram);
if(isReadonly === true) ReadonlyDiagram(diagram);
});
});
Reference