rtc-sharedcursor

The rtc-sharedcursor module makes it simple to share and touch mouse events for a target element across the wire one or more peers across a data channel connection.

Example Usage

var quickconnect = require('rtc-quickconnect');
var crel = require('crel');

// initialise quickconnect
var qc = quickconnect('https://switchboard.rtc.io/', {
  room: 'test:sharedcursor'
});

// create the shared cursor
var cursor = require('rtc-sharedcursor')(qc);

// create some test elements
var elements = [
  crel('canvas', { width: 200, height: 200 }),
  crel('canvas', { width: 500, height: 500 }),
  crel('canvas', { width: 20, height: 100 }),
];

// randomly select one of the canvases
var target = elements[(Math.random() * elements.length) | 0];
var context = target.getContext('2d');

// add our test elements to the dom
elements.forEach(function(el) {
  document.body.appendChild(el);
});

// color our target so we know the capture source
context.fillStyle = 'rgb(200, 200, 200)';
context.fillRect(0, 0, target.width, target.height);

// attach the cursor the element now it is in the dom and has
// valid DOM bounds
cursor.attach(target);

// draw on the target
cursor.on('data', function(id, type, x, y) {
  context.fillStyle = 'rgb(200, 200, 200)';
  context.fillRect(0, 0, target.width, target.height);
  context.fillStyle = type === 'move' ? 'green' : 'red';
  context.fillRect(x - 5, y - 5, 10, 10);
});

Running the example in a few different windows, should display something similar to what is shown below:

License(s)

Apache 2.0

Copyright 2015 National ICT Australia Limited (NICTA)

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.