I am using draw2d javascript library for drawing predefined shapes and custom shapes in it's canvas.
As I don't have any example made yet, I am trying to copy from it's documentation but doesn't seem to find a good way to research it as it contains a whole lot of it.
Here is the circle example.
http://www.draw2d.org/draw2d_touch/jsdoc_6/#!/api/draw2d.shape.basic.Circle
and here are some more documentation with examples.
http://www.draw2d.org/draw2d_touch/jsdoc_6/
I have premade shapes with html and css and I am trying to drag and drop and render them on canvas like these in this image. Also when dropped, they should have input and output ports too.
Is it possible to convert this html/css to draw2d shapes?
So here this is made possible via extending draw2d's SVGFigure and thus we have ability to provide custom svg to render it as a custom shape.
Below links were useful in this context.
http://www.draw2d.org/draw2d_touch/jsdoc/#!/guide/extending_svg_figure-section-live-example
https://github.com/freegroup/draw2d/tree/master/examples/shape_custom_svg
http://www.draw2d.org/draw2d_touch/jsdoc_6/#!/api/draw2d.SetFigure
https://github.com/freegroup/draw2d/tree/master/examples/shape_labeld
https://github.com/freegroup/draw2d/tree/master/examples/shape_custom_markdown
Related
According to this link, it is possible to modify a SVG, depending on the parameters included in the URL used to access this SVG.
Is it possible to do so using the toSVG() method ?
Let's say I create a basic canvas with a few elements. Once I'm done, I export and save the result of my canvas.toSVG() on AWS.
I get this image
Is it possible to modify the way toSVG() behaves, so that adding ?color=red at the end of the URL would make my tshirt red ?
I tried using the example from the documentation, using replace() on my canvas objects, but this generates empty SVGs.
I'm using React.js to build an app, which includes quite a few svg charts. I'm using d3 functions that help in chart creation, such as scales, but then using React to generate the svg elements. Here's a great writeup on the approach: http://10consulting.com/2014/02/19/d3-plus-reactjs-for-charting/
Part of why I'm going down this road was for performance - the first version of the app was too slow. It has a lot of elements and a lot of user-interactivity, all client-side. I'm trying to basically recreate the dc.js library in React.
It's a really fun approach and intuitive (more so than d3 alone IMO). Building axes is tedious though, and d3 does it so nicely. I would love d3 to just be able to output a string of svg elements that represent the axis (and maybe other elements) , and I feed it to React to include in the DOM.
I did see this SO question (How to make d3.js generate an svg without drawing it?) and the answer was to append it in the DOM and remove it, or create a DOM fragment. Those approaches go against the React approach and likely negate the performance benefits of React. I also saw jsdom and phantomjs solutions, which will not work in my case.
Can d3 generate svg without appending it to the DOM?
#Lars is correct if you are using traditional means. However, this is definitely possible with 'jsdom'. This library can simulate the DOM and also allows for string input. Which means you could inject the root element into the fake DOM and get a new window element to manipulate. You could then use D3 without changing it's source and using is like normal.
This would allow for the generation of an SVG.
No. D3 by design operates directly on the DOM through its selections. To have it generate string representations instead without modifying the DOM, you would need to modify its source code (and it would be quite a significant modification).
I'm working with nokia HERE maps and I want to add an additional layer of visualization graphics on top of a map. Since the possibilities to interact, manipulate and customize the graphics created by the HERE api are limited, I would like to work with d3.js/SVG for my visualizations.
My straight forward and obvious solution would have been to just add an absolute positioned SVG element on top of the map and giving it the same dimensions. But of course that takes every possibility to interact with the map. Is there any solution to add an overlay to the map which allows me to put SVG on it while maintaining the full interactivity (panning, zooming, clicking) of the map? Also it should be possible to interact with the SVG.
I know that there is a possibility to add a custom overlay of tiles provided by a tile server to HERE maps but that's not really what I'm looking for. I'm looking for something like the solution google has to offer to this problem. A set of custom layers which are always in sync with the corresponding map and have their own initialize, draw and remove methods. Is there something similar for HERE maps?
I think you are after the nokia.maps.map.provider.CanvasProvider class. This class provides a ground overlay bound to a specific area which offers a draw() method. The attach() method is the equivalent of your intialize I think, and you can refresh the overlay using update().
Depending upon your use case, I've also found the following techniques useful regarding SVG, Images and HERE Maps:
For an SVG marker which is anchored to a point and doesn't resize
use: SVG Markers
Alternatively override the Marker class and write using the low
level graphics commands to add flexibility to the rendering of a
marker anchored to a point. Like this: Defaced Marker
To add an image bound to a specific area use the ImageProvider class
To add a series of tiled images from a TMS (Tile Map Service) use the ImgTileProvider class
Alternatively if the [zoom][col][row] is useful to you and you
want to write SVG based stuff yourself try something like this example - which combines
SVG with 256x256 pixel markers.
Note that the HERE Maps API for JavaScript only supports SVG Tiny.
A class like the old nokia.maps.map.provider.CanvasProvider isn't even available on the new v3 API from Here.
Your best bet is on Leaflet using custom providers loading Here map tiles. Then you just load this Custom Overlay class and you're all set to draw D3, WebGL, whatever you need. Leaflet only loads the tiles from the providers and exposes some simple APIs. You will not have to deal with any of the providers' APIs.
Just don't forget to add your app_id and app_code to the provider class.
In the past I've using graphviz's node "label", "URL" (or "href") and "tooltip" attributes to generate SVG graphics where the nodes have the text label, mouse-over displays the tooltip, and clicking the node (assuming your browser is displaying the svg) takes you to the URL target (and all those strings can be different).
Right now I'm trying to generate the same sort of thing in Cytoscape. Exporting svg works nicely, but linkage of nodes to external URLs seems all tied up with Cytoscape's "linkout" feature; while this seems very powerful while you're actually using Cytoscape, it's not clear to me whether there's some way of getting it to produce clickable nodes or labels (I'd settle for either) in an exported SVG. The URLs I want to link to are a node attribute of my imported graph.
Is there something I'm missing in Cytoscape which will create links in exported SVG ? Any suggestions for alternative approaches ? e.g some way of getting labels to be arbitrary HTML including <a href=...>...</a> ?
My "plan B" is to postprocess the exported SVG, but it'd be nicer to have Cytoscape do it all.
So far as my further use of the tool permitted me to determine, Cytoscape just doesn't have this capability.
I need to build a custom designed bar chart that displays some simple data. Below are my requirements. Can anyone suggest the best web technology for my requirements.
high browser compatibility
ability to draw shapes
ability to fill shapes with gradients
ability to have onclick and onmouseover events for the different shapes (bars in the chart).
Thanks guys. I was thinking of using svg but looking for suggestions.
How about Raphaël - it's SVG/VML.
It says:
Browser compatibility:
Raphaël currently supports Firefox
3.0+, Safari 3.0+, Opera 9.5+ and Internet Explorer 6.0+.
Ability to draw shapes
circle, rect, ellipse, image, text, path
Ability to fill shapes with gradients
yes
Ability to have onclick and onmouseover events
yes:
... every graphical object you
create is also a DOM object, so you
can attach JavaScript event handlers
or modify them later.
Everything in the reference
On top of that, there's a plugin called gRaphael which makes the creation of charts easier.
Simple data - Google Charts API or Google Visualization API may suit you.
Details for all features of image charts can be found on the Chart feature list
You may also take a look at the comparison of the Charts API and the Visualization API.
Another candidate of course is JQuery SVG - if you're already familiar with jquery you may prefer this one.
There's a comparison of JQuery SVG and Raphaël on SO:
jQuery SVG vs. Raphael
I recommend using Adobe Flex. Below is an example of how easy pie chart creation can be in Flex:
<mx:Panel title="Pie Chart">
<mx:PieChart id="myChart"
dataProvider="{expenses}"
showDataTips="true"
>
<mx:series>
<mx:PieSeries
field="Amount"
nameField="Expense"
labelPosition="callout"
/>
</mx:series>
</mx:PieChart>
<mx:Legend dataProvider="{myChart}"/>
Based on your criteria:
high browser compatibility: Flex is used on more than 95% of all browsers and behaves the same in all browsers. No more need to check if your web app is running in ie, firefox, chrome, etc... because any browser that has a flash player is compatible.
ability to draw shapes: Flash's greatest strength is the ability to draw. Charts are completely customizable and skinnable to achieve the look you need.
Ability to fill shapes with gradients - done easily by setting style attributes or a custom skin.
ability to have onclick and onmouseover events for the different shapes - see this link for some easy ways to create user interactions with charts.
Hi i hope this link may help you i found it while searching for a solution similar to what you're looking for:
http://www.artetics.com/Articles/using-various-javascript-libraries-to-create-pie-chart
i'm trying gRaphael, i'm having difficulties on finding documentation though. you have to read the code and use the exploded instead of the min.js
I would like to share jquery.jqplot.js. It has lots of jQuery options, but depends on other plugins such as syntaxhighliter etc.