| { | |
| "tip_of_the_day": [ | |
| { | |
| "title": "Introduction", | |
| "description": [ | |
| "A huge image is shown on screen; you can pan/zoom the image to see all the detail or the entire image at once.", | |
| "Each of the possible operations can be performed by one of several mouse actions, some operations can also be performed using the keyboard." | |
| ] | |
| }, | |
| { |
Here's a d3 plugin that allows you to create a polygon selection. You instantiate it just like d3.svg.brush.
var brush = d3.svg.polybrush();It has an extra public method that 'brush' does not, and that's 'isWithinExtent(x, y)'. You can use this method to test if a given point falls within the drawn extent.
if (brush.isWithinExtent(x, y)) {
console.log("I'm inside!");
}
| <html> | |
| <head> | |
| <style> | |
| iframe.side-by-side | |
| { | |
| float: left; | |
| border: 2px #aaa solid; | |
| width: 1040px; | |
| height: 15000px; | |
| margin: 0; |
Lots of examples of using d3.nest function
See it running at [http://bl.ocks.org/3695277] - original at [http://bl.ocks.org/3176159]
Documentation: [https://github.com/mbostock/d3/wiki/Arrays]
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