How to request fullscreen in compiled dart

Question

I\'m playing around with a Dart app trying to get fullscreen mode to work. My HTML (excluding boilerplate):

  Clicking this         


        
                      

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Answer 1

As pointed out in the comments (thanks Günter!), this is a known issue. #12 in that thread posted a good workaround, edited by me to be a bit more generic:

import 'dart:js';
void fullscreenWorkaround(Element element) {
  var elem = new JsObject.fromBrowserObject(element);

  if (elem.hasProperty("requestFullscreen")) {
    elem.callMethod("requestFullscreen");
  }
  else {
    List<String> vendors = ['moz', 'webkit', 'ms', 'o'];
    for (String vendor in vendors) {
      String vendorFullscreen = "${vendor}RequestFullscreen";
      if (vendor == 'moz') {
        vendorFullscreen = "${vendor}RequestFullScreen";
      }
      if (elem.hasProperty(vendorFullscreen)) {
        elem.callMethod(vendorFullscreen);
        return;
      }
    }
  }
}

I used this in my code, and replaced this call

div.requestFullscreen();

with

fullscreenWorkaround(div);

which worked great. Tested and working compiled on Chrome and IE.

Answer 2

Here is an extended version of Tobbe hack to use the whole fullscreen API.

import 'dart:html';
import 'dart:js';

// Workaround for https://code.google.com/p/dart/issues/detail?id=4136
class FullscreenWorkaround {
  static void requestFullscreen(Element element) {
    _callMethods(element, [
      'requestFullscreen',
      'webkitRequestFullscreen',
      'mozRequestFullScreen',
      'msRequestFullscreen',
      'oRequestFullscreen'
    ]);
  }

  static void exitFullscreen() {
    _callMethods(document, [
      'exitFullscreen',
      'webkitExitFullscreen',
      'mozCancelFullScreen',
      'msExitFullscreen',
      'oExitFullscreen'
    ]);
  }

  static bool get fullscreenEnabled {
    var result = _getProperty(document, [
      'fullscreenEnabled',
      'webkitFullscreenEnabled',
      'mozFullScreenEnabled',
      'msFullscreenEnabled',
      'oFullscreenEnabled'
    ]);
    return result != null ? result : false;
  }

  static get fullscreenElement {
    return _getProperty(document, [
      'fullscreenElement',
      'webkitFullscreenElement',
      'mozFullScreenElement',
      'msFullscreenElement',
      'oFullscreenElement'
    ]);
  }

  static _callMethods(browserObject, List methods) {
    var jsElem = new JsObject.fromBrowserObject(browserObject);

    for (String methodName in methods) {
      if (jsElem.hasProperty(methodName)) {
        return jsElem.callMethod(methodName);
      }
    }
  }

  static _getProperty(browserObject, List properties) {
    var jsElem = new JsObject.fromBrowserObject(browserObject);

    for (String propertyName in properties) {
      if (jsElem.hasProperty(propertyName)) {
        return jsElem[propertyName];
      }
    }
  }
}