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Sample app for desktop capture API
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| { | |
| "main": "screencapturetest.html", | |
| "name": "Screen cap test", | |
| "description": "screen cap test", | |
| "version": "0.0.1", | |
| "keywords": [ ], | |
| "chromium-args" : "--enable-usermedia-screen-capturing", | |
| "window": { | |
| "show": true, | |
| "title": "Screen cap test", | |
| "toolbar": true, | |
| "frame": true, | |
| "width": 1920, | |
| "height": 1080, | |
| "position": "center", | |
| "resizable": true | |
| }, | |
| "webkit": { | |
| "plugin": true | |
| } | |
| } |
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| <html> | |
| <script> | |
| var gui = require('nw.gui'); | |
| navigator.getUserMedia = navigator.mozGetUserMedia || navigator.webkitGetUserMedia; | |
| gui.Screen.Init(); | |
| var desktopcapture = gui.Screen.DesktopCaptureMonitor; | |
| var once = false; | |
| var streams = {}; | |
| //HTML Generating | |
| /////////////////////////////////////////// | |
| function refreshGroupingHTML(id) { | |
| var order = streams[id].order; | |
| var grouping = document.getElementById('grouping' + order); | |
| if (grouping == undefined || grouping == null) { | |
| console.log("index undef:" + order); | |
| } else { | |
| grouping.innerHTML = "<img id='stream" + order + "' src='data:image/png;base64," + streams[id].png + "' onclick='javascript:startStream(\"" + id + "\");'/>"; | |
| grouping.innerHTML = grouping.innerHTML + "<span style='max-width:100px; display:block;overflow: hidden;' id='title" + order + "'>" + streams[id].name + "</span><br>"; | |
| } | |
| } | |
| function removeLastChild() { | |
| var thumbnails = document.getElementById('thumbnails'); | |
| thumbnails.removeChild(thumbnails.lastChild); | |
| } | |
| function addGrouping(index) { | |
| var thumbsdiv = document.getElementById('thumbnails'); | |
| thumbsdiv.innerHTML = thumbsdiv.innerHTML + "<div style='display: inline-block;vertical-align: top;' id='grouping" + index + "'>"; | |
| thumbsdiv.innerHTML = thumbsdiv.innerHTML + "</div>" | |
| } | |
| function setGroupingsNotStarted() { | |
| document.getElementById('thumbnails').innerHTML = "[Not started]"; | |
| } | |
| function clearGroupings() { | |
| document.getElementById('thumbnails').innerHTML = ""; | |
| } | |
| /////////////////////////////////////////// | |
| //End HTML Generating | |
| //Picker logic | |
| /////////////////////////////////////////// | |
| function start() { | |
| if (desktopcapture.started) | |
| return; | |
| clearGroupings(); | |
| desktopcapture.on("added", function (id, name, order,type) { | |
| addGrouping(Object.keys(streams).length); | |
| if(type=="screen") | |
| name = "Screen " + (order + 1); | |
| streams[id] = { "order": order, "png": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAACklEQVQYV2P4DwABAQEAWk1v8QAAAABJRU5ErkJggg==", "name": name }; | |
| refreshGroupingHTML(id); | |
| }); | |
| desktopcapture.on("removed", function (id) { | |
| delete streams[id]; | |
| removeLastChild(); | |
| }); | |
| desktopcapture.on("orderchanged", function (id, new_order, old_order) { | |
| streams[id].order = new_order; | |
| refreshGroupingHTML(id); | |
| }); | |
| desktopcapture.on("namechanged", function (id, name) { | |
| streams[id].name = name; | |
| refreshGroupingHTML(id); | |
| }); | |
| desktopcapture.on("thumbnailchanged", function (id, thumbnail) { | |
| streams[id].png = thumbnail; | |
| refreshGroupingHTML(id); | |
| }); | |
| desktopcapture.start(true, true); | |
| } | |
| function stop() { | |
| if (!desktopcapture.started) | |
| return; | |
| desktopcapture.removeAllListeners("added"); | |
| desktopcapture.removeAllListeners("removed"); | |
| desktopcapture.removeAllListeners("orderchanged"); | |
| desktopcapture.removeAllListeners("namechanged"); | |
| desktopcapture.removeAllListeners("thumbnailchanged"); | |
| desktopcapture.stop(); | |
| streams = {}; | |
| document.getElementById('video').src = ""; | |
| setGroupingsNotStarted(); | |
| } | |
| //End picker logic | |
| /////////////////////////////////////////// | |
| //Stream viewer | |
| /////////////////////////////////////////// | |
| var curStream = null; | |
| function startStream(id) { | |
| if (id == "") | |
| return; | |
| var constraints = { | |
| video: { | |
| mandatory: { | |
| chromeMediaSource: 'desktop', | |
| chromeMediaSourceId: id, | |
| maxWidth: 1920, | |
| maxHeight: 1080 | |
| } | |
| } | |
| }; | |
| if (curStream != null) | |
| curStream.stop(); | |
| navigator.webkitGetUserMedia(constraints, function (stream) { | |
| curStream = stream; | |
| document.getElementById('video').src = URL.createObjectURL(stream); | |
| document.getElementById('video').play(); | |
| }, function (error) { | |
| console.error(error); | |
| }); | |
| } | |
| //End stream viewer | |
| /////////////////////////////////////////// | |
| </script> | |
| <body> | |
| <button onclick="javascript:start();">Start</button><button onclick="javascript:stop();">Stop</button><br/> | |
| Click a thumbnail to view stream: | |
| <div id="thumbnails" style="max-width: 800px;">[Not started]</div><br/> | |
| <video id="video"></video><br/><br/><br/> | |
| </body> | |
| </html> |
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