SVG g hides when parent g is set to a height - svg

I am relatively new to SVG. I am plotting a chart which will dynamically plot temperature or wind value on x,y axis respectively. I am good with x-axis positioning.
But when it comes to Y-Axis, position come right but if the value is higher than parent chart height, it get cut off as you can see in the picture.
Need help on how to force visible the circle/element even it exceeds the parent element width or height?
Here is how mark up gets generated
I am using d3.js for this.
Here is the code for generating circle with text
let svg = container
.append("svg")
.attr("width", width)
.attr("height", height+(height*0.7));
const chart = svg
.append("g")
.attr('class','chartwind')
.attr("transform", "translate(" + padding.left + "," + (padding.top) + ")")
chart.append("path")
.data(datapoints)
.attr("class", "line wind-line")
.style("stroke", colorScale("wind"))
.style('stroke-width', '2px')
.attr("d", windLine)
let windPoint = chart.selectAll('g.windpoint').data(datapoints).enter().append('g').attr('class', 'windpoint').attr('transform', function (d) {
return 'translate(' + (Math.round(xScale(d.parsedUtcDateTimeNow)) - 10) + ',' + yScale(d.windSpeed) + ')';
})
chart.selectAll('.windcircle')
.data(Infos)
.enter().append('circle')
.attr("class", "windcircle")
.style("stroke", colorScale("wind"))
.style('stroke-width', '2px')
.attr("cx", (d) => xScale(d.parsedUtcDateTimeNow))
.attr("cy", (d) => {
return yScale(d.windSpeed);
})
.attr('r', 3)
.style("fill", colorScale("wind"))
windPoint
.append('circle')
.attr("cx", 0)
.attr("cy", 0)
.attr("r", function (d) {
return 8;
})
.attr("fill", "green")
.attr("transform", "translate(0,-23)")
windPoint
.append('text')
.attr("fill", "white")
.attr("transform", "translate(0,-19)")
.attr("text-anchor", "middle")
.attr("font-size", "12px")
.attr("font-weight", "600")
.text((d) => {
return d.windGust;
});
windPoint
.append('text')
.attr('text-anchor', 'middle')
//.attr("transform","translate(0,5)")
.text((d) => {
return d.windSpeed;
});
Update
This is how I am constructing SVG height and width
function getSizesById(id) {
const container = document.querySelector(`#${id}`)
if (!container)
return null
return {
height: container.clientHeight,
width: container.clientWidth,
}
}
const { width, height } = (() => {
return getSizesById(containerID)
})()
const { width, height } = (() => {
return getSizesById(containerID)
})(),
padding = {
...size.padding,
top: 20,
bottom: 20
},
chartHeight = height - padding.bottom - padding.top,
chartWidth = width - padding.left - padding.right
const container = d3.select(`#${containerID}`)
let svg = container
.append("svg")
.attr("width", width)
.attr("height", height);
Note: SVG height (or chart) should look with in the DIV and only when the data points go over the scale, then we need data to be visible over the div height.

<g> elements do not have any inherent size. They are only a logical wrapper for a group of markup tags, and a place to give them some common properties. What restricts the visible parts of your chart is the <svg> element.
Your code shows that each datapoint is represented by grafic elements that span a bounding box of (-8 -31 16 35) (left - top - width - height). This is how much space you need to show all of it.
Remove the transform attribute from your .chartwind group. The space you need to show the complete graph is
left: lower boundary of your xScale range minus 8
top: lower boundary of your yScale range minus 31 (in the downward coordinate system)
width: extent of your xScale range plus 16
height: extent of your yScale range plus 35
Add some padding if you like.
Add a viewBox attribute with these four numbers to the <svg> element: viewbox="<left> <top> <width> <height>". The area described like this will then be fitted inside the available space of the <svg> element, without you having to do any further figuring out of transformations.

Related

D3 proper text() in tremap

i'm new to d3. My problem is unreadable text.
I suppose it's cuz i added text not to rect but to svg. How do i recode or fix this thing?
https://codepen.io/DeanWinchester88/pen/xxrjLrM
svg
.selectAll("text")
.data(root.leaves())
.enter()
.append("text")
.attr("x", (d) => d.x0 +10)
.attr("y", (d) => d.y0 + 20)
.text( (d) => d.data.name)
.attr("font-size", "12px")
.attr("fill","white")
.attr("overflow", "hidden")
.attr("max-width", (d) => d.x1 - d.x0)
tspan = text.text(null)
.append("tspan")
.attr("x", x)
.attr("y", y)
.attr("dy", dy + "em")
Here's your revised code based on my comment above:
https://codepen.io/mattsrinc/pen/MWozBWQ
svg
.selectAll("text")
.data(root.leaves())
.enter()
.append("text")
.attr('transform', d => 'translate(' + d.x0 + ',' + d.y0 + ')')
.selectAll('tspan')
.data(d => d.data.name.split(/(?=[A-Z][^A-Z])/g))
.enter()
.append('tspan')
.attr('font-size', '0.8em')
.attr('fill', 'white')
.attr('x', function(d) { console.log(d); return '0.5em' })
.attr('y', (d, i) => 12 * (i + 1))
.text(d => d);
I've left the console.log command so that you can see how the (game) name is split into parts. And that Pac-Man is right but it's the only one game for the console category (2600) so it translates to thin black rectangle on top left (something you should consider how to solve it visually).
Then also SVG CSS attribute "overflow: hidden" won't work for your data cells with TSPAN. You would have to handle that with calculating this cell width and width of the current word(s) in a line (of TSPAN tag to add). It would be better to follow and expand your other referenced codepen to work with cells that would ease this task.
Other than that I've just changed the color palette used and you can see color ranges here:
https://github.com/d3/d3-scale-chromatic

How to sort bar charts synchronous with the ticks of x axis

I am adopting the example from Mike Bostock to sort bar charts - http://bl.ocks.org/mbostock/3885705.
However, the transition of the bars and the ticks of the x axis are not occuring at the same time.
The reason is that the transition is called separately for the bars and the ticks (in the function change():
transition.selectAll(".bar")
.delay(delay)
.attr("x", function(d) { return x0(d.letter); });
transition.select(".x.axis")
.call(xAxis)
.selectAll("g")
.delay(delay);
The solution should be when constructing the svg, I would like to add each bar to the corresponding tick.
However I didn't succeed to correctly adjusting the line
svg.selectAll(".bar")
.data(data)
.enter().append("rect")...
e.g.
svg.selectAll("g.tick")
.data(data)
.enter().append("rect")...// would put all the bars under each g.tick
or
svg.selectAll(".x.axis")
.data(data)
.enter().append("rect")...// would put the bars after all g.tick's at the end. So again I can't grap the whole group together later.
Interesting idea.
You can get the rects grouped with each tick's g by:
svg.selectAll(".x>.tick")
.data(data)
.append("rect")
.attr("class", "bar")
.attr("x", function(d) {
return -x.rangeBand()/2; // set x to be half width, tick g will position it
})
.attr("width", x.rangeBand())
.attr("y", function(d) {
return -(height - y(d.frequency)); // set y to negative
})
.attr("height", function(d) {
return height - y(d.frequency);
});
You then have to rewrite the transition since calling .call(xAxis); will recreate the tick g and remove the bars.
transition.selectAll(".x>.tick")
.delay(delay)
.attr("transform", function(d) {
return "translate(" + x0(d.letter) + ",0)";
});
Putting this together.

.style of child nodes in d3js

I'm trying to make a simple graph with nodes and links. I have "g" elements containing a circle and its text, and links on their own. I have, for example, this bit on code called on a mouseover event:
//check if circle is connected to current "viewed" (mouseover-ed)
//circle via a link referenced by "that" and paint it green if so
circles.filter(function() {
return d3.select(this).attr("index") == d3.select(that).attr("src");
}).attr("viewed",1).style("stroke", "green");
});
This was really a long shot as nodes is the 'g' element container and I wasn't sure what calling .style would do, but to my surprise it did change the color - but only for the text!
Is there a way to make it change the stroke style of the circle as well?
The declaration code:
var circles = svg.append("g")
.attr("class","nodes")
.selectAll("circle")
.data(graph.nodes)
.enter()
.append("g")
.attr("transform",function(d,i){d.x = getX(i);d.y=getY(i);return "translate(" + d.x + "," + d.y + ")";})
.attr("name", function(d){return d.name;})
.attr("viewed", 0)
.attr("focused", 0)
.attr("index", function(d, i) {return i;});
circles.append("circle")
.style("stroke", "gray")
.style("fill", "white")
.attr("r", node_radius_wo_pad)
.on("mouseover", function(){...};
circles.append("text")
.attr("text-anchor","middle")
.text(function(d){return d.name});
The reason this is working is that you haven't explicitly declared a stroke colour for the text and so it inherits what you set for the parent g element. To make this work for the circles, you have to select them explicitly:
var toChange = circles.filter(function() {
return d3.select(this).attr("index") == d3.select(that).attr("src");
});
toChange.attr("viewed", 1);
toChange.selectAll("circle").style("stroke", "green");
toChange.selectAll("text").style("stroke", "green");

How to translate svg g elements to cozy up with siblings?

var boxes = [[30, 45], [50, 30], [40, 30]]; // [w, h]
//Should i calculate `translate` value here, adding all heights?
var secs = wrapper.selectAll('g.section')
.data(data)
.enter()
.append('g')
.attr('class', 'section')
.attr("transform", "translate(" + 0 + "," + 'unknown' + ")");
//could be many sub-secs by a lot of data transformation before appending rect to the last one of them.
secs.append('rect')
.datum(function(d){return d;})
.attr('class', 'fragment')
.attr('x', 0)
.attr('y', 0)
.attr('width', function(d){return d[0];})
.attr('height', function(d){return d[1];})
// or here, not from data but from elem's dimensions?
secs.each(function(sec, i){
var prev = this.previousSibling?this.previousSibling.getBBox():'';
var ty = prev?prev.height+ prev.y:0;
d3.select(this).attr("transform", "translate(" + 0 + "," + ty + ")");
});
Is this how you translate g elements to fit their childrens, at any level of depth?
And i'll have to translate them manually when child expands?
i'm new at svg and d3.
Thank you.
It looks like you would need to keep track of the sum of heights and translate by that. That is, for each rectangle that you add add its height to a total which you can then use to offset subsequent elements.

Fade/change the color of an SVG Shape over time after being added to a canvas?

I have created an SVG map that plots tweets live containing particular keywords. I'm drawing each tweet to the screen as a circle (or dot), and after 50 tweets have been added to the map, the oldest one will disappear.
I'd like to have some sort of color decay for the circles depending on how long they've been on the map.
New tweets would pop onto the map and be red. As time passes, points already plotted on the map will slowly fade to black.
Here's where I add the circles to the map:
function mapTweet(tweetData) {
var tipText; // Ignore this. For tweet dot hovering.
var coordinates = projection([tweetData.geo.coordinates[1], tweetData.geo.coordinates[0]]);
addCircle(coordinates, tipText);
}
function addCircle(coordinates, tipText, r) {
tweetNumber++;
// too many tweets
if (tweetNumber == 50) {
tweetNumber = 0;
}
//removes expired circles
$('#' + tweetNumber).remove();
var rad;
//determine if radius size needs to be bumped
if (arguments.length == 3) {
rad = r;
} else {
rad = 3;
}
// add radar-style ping effect
map.append('svg:circle')
.style("stroke", "rgba(255,49,49,.7)")
.style("stroke-width", 1)
.style("fill", "rgba(0,0,0,0)")
.attr('cx', coordinates[0])
.attr('cy', coordinates[1])
.attr('r', 3)
.transition()
.delay(0)
.duration(2000)
.attr("r", 60)
.style("stroke-width", 2)
.style("stroke", "rgba(255,49,49,0.0001)").transition().duration(2000).remove();
// add circles representing tweets
map.append('svg:circle').attr("class", "tweetCircles")
.attr("id", tweetNumber)
.style("stroke", "rgba(255,49,49,.7)")
.style("stroke-width", 1)
.style("fill", "rgba(240,49,49,1)")
.attr('cx', coordinates[0])
.attr('cy', coordinates[1])
.attr('r', rad);
addTipsy(tipText, tweetNumber); // Ignore this. For tweet dot hovering.
}
Once a circle is drawn, does it have to be redrawn to change the color? Or can dots have their attributes changed after being added to the canvas?
How can I decay the color over, say, 20 seconds?
Append an animate element as a child of the circle
.append('svg:animate')
.attr('attributeName', 'fill')
.attr('from', 'red')
.attr('to', 'blue')
.attr('dur', '20s');
This will interpolate from red to blue or whatever colours you choose.

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