I'm trying to go through a selection of paragraphs with d3 and conditionally add elements in between some of them.
I'm currently using a mix of d3 and plain DOM stuff:
diagram.each(function (d, i) {
if (currentRow !== d.row) {
currentRow += 1;
var br = document.createElement('br');
this.parentNode.insertBefore(br, this);
}
});
Is there a way to do this bit with d3?
var br = document.createElement('br');
this.parentNode.insertBefore(br, this);
In English: I'm trying to insert a break element after the current paragraph element. Append acts on a parent, and insert would be nice, but I have no way, that I know of, to reference this current paragraph in the second parameter of insert: https://github.com/mbostock/d3/wiki/Selections#insert
Any pointers?
var br = d3.select("svg").append("br") ?
is this not what you want ? I don't have enough experience to comment :((
Related
Stacked Bar chart not able to filter on click of any Stack
I need to filter all the charts when clicking on any stack, which is not happening and struggling for a few days.
I've created a fiddle with link
http://jsfiddle.net/praveenNbd/09t5fd7v/13/
I feel am messing up with keys creation as suggested by gordonwoodhull.
function stack_second(group) {
return {
all: function () {
var all = group.all(),
m = {};
// build matrix from multikey/value pairs
all.forEach(function (kv) {
var ks = kv.key;
m[ks] = kv.value;
});
// then produce multivalue key/value pairs
return Object.keys(m).map(function (k) {
return {
key: k,
value: m[k]
};
});
}
};
}
I tried to follow this example https://dc-js.github.io/dc.js/examples/filter-stacks.html
Not able to figure out how below code works:
barChart.on('pretransition', function (chart) {
chart.selectAll('rect.bar')
.classed('stack-deselected', function (d) {
// display stack faded if the chart has filters AND
// the current stack is not one of them
var key = multikey(d.x, d.layer);
//var key = [d.x, d.layer];
return chart.filter() && chart.filters().indexOf(key) === -1;
})
.on('click', function (d) {
chart.filter(multikey(d.x, d.layer));
dc.redrawAll();
});
});
Can someone please point me out in the right direction.
Thanks for stopping by.
You usually don't want to use multiple keys for the X axis unless you have a really, really good reason. It is just going to make things difficult
Here, the filter-stacks example is already using multiple keys, and your data also has multiple keys. If you want to use your data with this example, I would suggest crunching together the two keys, since it looks like you are really using the two together as an ordinal key. We'll see one way to do that below.
You were also trying to combine two different techniques for stacking the bars, stack_second() and your own custom reducer. I don't think your custom reducer will be compatible with filtering by stacks, so I will drop it in this answer.
You'll have to use the multikey() function, and crunch together your two X keys:
dim = ndx.dimension(function (d) {
return multikey(d[0] + ',' + d[1], d[2]);
});
Messy, as this will create keys that look like 0,0xRejected... not so human-readable, but the filter-stacks hack relies on being able to split the key into two parts and this will let it do that.
I didn't see any good reason to use a custom reduction for the row chart, so I just used reduceCount:
var barGrp = barDim.group();
I found a couple of new problems when working on this.
First, your data doesn't have every stack for every X value. So I added a parameter to stack_second() include all the "needed" stacks:
function stack_second(group, needed) {
return {
all: function() {
var all = group.all(),
m = {};
// build matrix from multikey/value pairs
all.forEach(function(kv) {
var ks = splitkey(kv.key);
m[ks[0]] = m[ks[0]] || Object.fromEntries(needed.map(n => [n,0]));
m[ks[0]][ks[1]] = kv.value;
});
// then produce multivalue key/value pairs
return Object.entries(m).map(([key,value]) => ({key,value}));
}
};
}
Probably the example should incorporate this change, although the data it uses doesn't need it.
Second, I found that the ordinal X scale was interfering, because there is no way to disable the selection greying behavior for bar charts with ordinal scales. (Maybe .brushOn(false) is completely ignored? I'm not sure.)
I fixed it in the pretransition handler by explicitly removing the built-in deselected class, so that our custom click handler and stack-deselected class can do their work:
chart.selectAll('rect.bar')
.classed('deselected', false)
All in all, I think this is way too complicated and I would advise not to use multiple keys for the X axis. But, as always, there is a way to make it work.
Here is a working fork of your fiddle.
I have an heatmap that show some data and a sparkline for each line of the heatmap.
If the user click on a row label, then the data are ordered in decreasing order, so each rect is placed in the right position.
Viceversa, if the user click on a column label.
Each react is placed in the right way but I'm not able to place the sparkline.
Here the code.
When the user click on a row label, also the path inside the svg containing the sparkline should be updated.
And then, when the user click on a column label, the svg containing the sparkline should be placed in the correct line.
To place the svg in the right place, I try to use the x and y attributes of svg. They are updated but the svg doesn't change its position. Why?
Here is a piece of code related to that:
var t = svg.transition().duration(1000);
var values = [];
var sorted;
sorted = d3.range(numRegions).sort(function(a, b) {
if(sortOrder) {
return values[b] - values[a];
}
else {
return values[a] - values[b];
}
});
t.selectAll('.rowLabel')
.attr('y', function(d, k) {
return sorted.indexOf(k) * cellSize;
});
Also, I don't know how to change the path of every sparkline svg. I could take the data and order them manually, but this is only good for the row on which the user has clicked and not for all the others.
How can I do?
The vertical and horizontal re-positioning/redrawing of those sparklines require different approaches:
Vertical adjustment
For this solution I'm using selection.sort, which:
Returns a new selection that contains a copy of each group in this selection sorted according to the compare function. After sorting, re-inserts elements to match the resulting order.
So, first, we set our selection:
var sortedSVG = d3.selectAll(".data-svg")
Then, since selection.sort deals with data, we bind the datum, which is the index of the SVG regarding your sorted array:
.datum(function(d){
return sorted.indexOf(+this.dataset.r)
})
Finally, we compare them in ascending order:
.sort(function(a,b){
return d3.ascending(a,b)
});
Have in mind that the change is immediate, not a slow and nice transition. This is because the elements are re-positioned in the DOM, and the new structure is painted immediately. For having a slow transition, you'll have to deal with HTML and CSS inside the container div (which may be worth a new specific question).
Horizontal adjustment
The issue here is getting all the relevant data from the selection:
var sel = d3.selectAll('rect[data-r=\'' + k + '\']')
.each(function() {
arr.push({value:+d3.select(this).attr('data-value'),
pos: +d3.select(this).attr('data-c')});
});
And sorting it according to data-c. After that, we map the result to a simple array:
var result = arr.sort(function(a,b){
return sorted.indexOf(a.pos) - sorted.indexOf(b.pos)
}).map(function(d){
return d.value
});
Conclusion
Here is the updated Plunker: http://next.plnkr.co/edit/85fIXWxmX0l42cHx or http://plnkr.co/edit/85fIXWxmX0l42cHx
PS: You'll need to re-position the circles as well.
I'm trying to do something that (it seems to me!) should be simple,
but my attempts are getting very convoluted, and I'm looking for d3
guidance.
Suppose I have a dragged group object (consisting of a rectangle and
its text) that has been dropped someplace at the end of a drag. I want
to "register" this group at specific coordinates. How do I do that?
I am adding my code to the dragended() function associated with
d3.drag's on("end") event.
function dragended(d) {
var move = d3.select(this);
var g = move._groups[0][0]; // same as this!
var rect = g.children[0]
rect.x = schedLeft;
rect.y = schedTop;
d3.select(this).classed("active", false);
}
I bind d3.select(this) to the variable move, and get an object
like that shown in the attached figure (Chrome developer Local).
EDIT: move._groups[0][0] is silly; it's the same as this!
Using this I can get the group (with child rect and
text nodes) that I want to move.
schedLeft is the x coordinate where I want the group dropped. The rect node has x and y attributes, but my rect.x = schedLeft
doesn't change anything (watching in the debugger).
Is that even the right way to have a transition of the entire group
(ie, including the attending text) to its new location?
Thanks to hints I found on SO here (from 2013!) I got it working using this:
function dragended(d) {
// register dragged move into hourSched
var top = schedTop + (nsched++) * menuWOHgt;
var transX = newDropX - d.x ;
var transY = newDropY - d.y;
var tstr = `translate( ${transX}, ${transY} )`;
d3.select(this).attr("transform", tstr)
.classed("active", false);
}
With a d3.js join Is there a way to select only the 'updating' elements separately from the 'entering' elements?
updateAndEnter = d3.selectAll('element').data(data);
entering = updateAndEnter.enter();
exiting = updateAndEnter.exit();
updatingOnly = ??;
Yes, the selection just after the data join contains the 'update only' elements. After appending to the enter() selection, it will be expanded to include the entering elements as well.
See General Update Pattern:
// DATA JOIN
// Join new data with old elements, if any.
var text = svg.selectAll("text")
.data(data);
// UPDATE
// Update old elements as needed.
text.attr("class", "update");
// ENTER
// Create new elements as needed.
text.enter().append("text")
.attr("class", "enter")
.attr("x", function(d, i) { return i * 32; })
.attr("dy", ".35em");
// ENTER + UPDATE
// Appending to the enter selection expands the update selection to include
// entering elements; so, operations on the update selection after appending to
// the enter selection will apply to both entering and updating nodes.
text.text(function(d) { return d; });
// EXIT
// Remove old elements as needed.
text.exit().remove();
it's my pleasure
For me ( too ) this is a little bit confusing : it seems that the only available set is actually ENTER+UPDATE ( blended together ) and EXIT.
But what if i want to work or at least identify only updated elements?
I wrote a very simple function ( that follows, simply put wrap it in a script tag at the end of a basic html page ) showing this simple dilemma : how do I highlight updated elements ? Only ENTER and EXIT seem to react "correctly"
To test it, just type in chrome console :
manage_p(['append','a few','paragraph'])
manage_p(['append','a few','new','paragraph'])
manage_p(['append','paragraphs'])
I can get green or red highlighting, i can't get white
Maybe we're missing D3Js specs?
Best regards,
Fabrizio
function join_p(dataSet) {
var el = d3.select('body');
var join = el
.selectAll('p')
.data(dataSet);
join.enter().append('p').style('background-color','white');
join.style('background-color','green').text(function(d) { return d; });
join.exit().text('eliminato').style('background-color','red');
}
How can I position the caret in CKEditor3.x?
I have 2 positions and I want use insertHTML() on both positions.
Pseudo-code:
editor.setCaret(20); // function does not exists
editor.insertHtml('::');
editor.setCaret(40); // function does not exists
editor.insertHtml('::');
I have tried (to set caret to position: 20):
var ranges = [];
var range = new CKEDITOR.dom.range( this.document );
range.startOffset = 20;
range.endOffset = 20;
ranges.push( range );
editor.getSelection().selectRanges( ranges );
This is not working. Can anybody help me please?
To insert text or do something with html in the editor you don't need to get the caret position.
Treat it as usual html.
P.S. If you probably want to restore cursor position after dom manipulating, try this
var s = editor.getSelection();
var selected_ranges = s.getRanges(); // save selected range
// do something
s.selectRanges(selected_ranges); // restore it
If you use insertElement instead of insert html (and say, insert a span element) the following should probably work:
editor.insertElement(element);
var range = new CKEDITOR.dom.range(editor.document);
range.moveToElementEditablePosition(element, true);
editor.getSelection().selectRanges([range]);