I'm porting over a d3 application into Aurelia and need to access the width and height of the chart's SVG parent in order to fit the chart properly to the current screen dimensions.
Before porting, it looked like this, filling up the whole container properly:
This is what it looks like in Aurelia:
It sets its dimensions by calling d3.select('#timeline-svg').style('width') and d3.select('#timeline-svg').style('height'). But now, in Aurelia, whenever I call those it returns dimensions of 300 x 150, no matter what the dimensions of the SVG actually are. I tried calling the same code on the SVG's div parent (which has identical dimensions) and that didn't help either.
So then I thought to try two-way data binding and changed my SVG tag to <svg id="timeline-svg" width.two-way="width"></svg> (and declared a corresponding width variable in my view-model), but I get the error: Error: Observation of a "svg" element's "width" property is not supported.
I've even tried using aurelia-pal, injecting it as DOM and calling:
attached() {console.log(this.DOM.getElementById("timeline-svg").style.width);} but all that gives me is an empty string.
There's a gist here (minus the d3 code, but all I want to figure out is how to access the dimensions of the SVG element in app.html from within app.js). What am I doing wrong? Thanks!
I'm not sure if this is exactly what you're looking for, but you could use the ref custom attribute to get a reference the svg element itself.
<svg ref="svgElement"></svg>
Then use the getBBox() function. The result of that function will have a width property you can use.
this.svgElement.getBBox().width
Here's a simple gist example: https://gist.run/?id=0ed86f511533512a22d002675221d812
Related
I'm trying to draw an axis on a canvas using D3 functionality (as exampled here https://www.tutorialsteacher.com/d3js/axes-in-d3). However every example I've seen is using an SVG while I wish to use canvas. On the other hand I didn't see any indication, in their documentation or elsewhere, that it can't be done in canvas.
Is it possible? If so, how?
In short: no, that's not possible.
D3 is pretty much render agnostic, meaning it can be used to create SVG, Canvas, other HTML elements etc. However, some modules are indeed quite specific, and that's the case of d3-axis.
If you have a look at d3-axis source code you'll see that it append SVG <path>, <line> and <text> elements for creating the axis. For instance:
path.enter().insert("path", ".tick")
Finally, here you have a discussion on this subject, where Bostock (D3 creator) abandons the idea of modifying the d3-axis module for creating axes on HTML canvas.
I am trying to understand and implement the D3 reusable chart pattern.
See sample implementation.
Here the updatableChart is called after selecting the id '#updatableChart'.
Question 1:
If I want to adjust the height parameter by calling as below, in subsequent code, it duplicates the chart.
d3.select('#updatableChart')
.call(updatableChart.height(450));
How should I use this pattern and update the height without affecting the original chart ?
Question 2:
Now if I need another chart, say, under div id '#updatableChart2', I can still call and get the chart using code below.
d3.select('#updatableChart2')
.call(updatableChart)`
But when I try to adjust the height by simply saying updatableChart.height(500); it affects only the second chart. How can I be specific in choosing the chart instance to work on ?
Thank you.
Answer 1:
The reason the chart is drawn again, is because I am calling the updatableChart.height(450) within a D3 selection. Instead it should have been called simply as updatableChart.height(450), to adjust the height.
Answer 2:
The problem was that the same chart object is attached into different div elements.
If another chart is needed under a different div, then the original barchart() should have been instantiated into another copy, say var updatableChart2 = barChart() and used further.
I am trying to modify Bullet Charts example of dimple.js with each bullet chart being in a child-svg of the parent-svg. Purpose of having individual svg for each bullet chart is to make their management (show/hide/remove) easier. Also, this makes the recursive definition of a chart complete - That is, a chart is contained by an svg.
The fiddle for the modified version is here....
As you can see, from 2nd chart onwards, on mouse hover, tool tips go out of place!!! Please note that, for child-svg, I've set the style overflow: visible without which tool-tips were not visible at all.
Want to know if I am missing anything in handling the attributes of child-svg elements or is it a bug in dimple.js. Also, please let me know if you know of any workaround.
Thanks.
One of the first questions I have is why do you want child svg elements? What are you trying to accomplish?
The only difference I see in your code and the example is the height / width swap at the top and the sub svg + bounds.
Keep in mind that the origin changes with each sub-svg. This might be why you are having trouble with the tool-tips. Maybe you have that worked into your add-bullet calls.
I think nagu has the right approach here if you really want separate svg elements.
I have two div on html page having id container1 and container2 i have created svg for each div and each svg contain circle, Now i want to connect two circle
Is it possible to connect two circle from two svg file on same page (cx,cy of both circle should genrate automatically)
My code snnipet..
Html
<div id="container1 " style="width:900px;height:800px;border:solid;"></div>
<div id="container2 " style="width:900px;height:100px;border:solid; margin-top: 25px;"></div>
created svg for container1 ,container2 using below code
var svg = d3.select("#"+id).append("svg")
.attr("width", $("#"+id).css("width"))
.attr("height",$("#"+id).css("height"));
and draw circle for each container using force layout
Now I want to connect these two circle using line
How is it possible ???
For your general question "how is it possible?", here is a general approach to get you started:
Super-impose a third, mostly transparent SVG over the whole page using absolute positioning. Draw the line inside this SVG.
Use .getScreenCTM() (get screen cumulative transformation matrix) to calculate the position of each circle on the page.
Use the same function to figure out the transformation from the screen to your overlay SVG, and multiply one screen CTM by the inverse of the other to get the net transformation so you can figure the start and end coordinates of your lines from the coordinates of your circles.
Add a listener to the web page as a whole for any re-layout events, and re-do the calculations above as necessary.
If all of that sounds too confusing, you might want to come up with an alternate web page design that puts all the graphics in one SVG. Or one which allows for a different way to indicate that elements are connected (same colour, or hover over one causes highlight on the other).
P.S. You might be able to use .getTransformToElement() to replace steps 2 and 3, but you'll want to test that out thoroughly. I've never tried using it to find the transformation between elements in different SVGs on the same web page.
I am not pro developer and have small knowledge of html and css only. I am trying to work on a joomla website. I tried to add Google charts to my page. Actually it's a module that I am inserting to an article through load module function. But there seems to have a conflict and the chart is not displayed correctly. It seems that there are some conflicts with the issues but I am not sure how to figure.
http://goo.gl/v1GVWk
if you go to above link and go to tabs and open trekking map tab you will see the bug. The width of chart is very small. I want to display 100% so that it can be responsive. I tried changing the width to px as well but no luck.
Please help me. ..
The width of elements that are hidden is zero. Therefore, the chart thinks your window has a width of zero and ends up using its smallest width.
Try triggering a resize event on the window when the tab is shown, this should cause the responsive code to run.
I never used Google charts, but what you are experiencing also happens on Google Maps.
You have two options, either you use opacity (or maybe visibility hidden) instead of display: none, this will make the chart to resize automatically when the page opens.
The other option is to trigger the resize event, something like this... Google chart redraw/scale with window resize
Hope it helps
Even though the outer wrapper div#ja-google-chart-wrapper-404 is set to 100% width, two child elements are fixed at 400px. Specifically, the <svg width="400"> element that sets the image at a fixed width, plus the div that wraps it has the width set to 400px. Even though you have their parent set to 100%, if the image itself has a fixed width it won't expand to fill the space.
Check to see if there's a setting in your module or in the Google Chart itself that lets you set a different width (or none at all) on the inserted image.
One solution would be to resize the SVG element when the a#tab1-trekking-map is clicked. I just tested this in the Chrome console and it worked to trigger the map to resize to the full width of the container:
jQuery("#ja-google-chart-wrapper-404 svg").resize();
Add this (or something like it) to your other scripts that are called when your tabs are clicked. If the ID of the chart wrapper is generated dynamically you may need to adjust a bit, but triggering resize() (as stated by Niet and miguelmpn) should do the trick nicely.