Is there a way to lock the cursor with dart that works on Firefox and Chrome?
I tried:
void lock(event)
{
var canvas = document.querySelector('canvas');
canvas.requestPointerLock();
}
in a mousedown-event listener
document.addEventListener('mousedown', lock, false);
I also tried
renderer.canvas.requestPointerLock();
where renderer is a WebGLRenderer from the three.dart package.
The problem is this works only in Chromium.
I looked up the following crossbrowser-solution for js, but this doesn't work in dart.
canvas.requestPointerLock = canvas.requestPointerLock ||
canvas.mozRequestPointerLock ||
canvas.webkitRequestPointerLock;
Is there a way to do the pointer lock in dart, or do I need to find a way to execute the javascript above from dart?
There is an open issue for this https://dartbug.com/4463
I think the problem in your code code using prefixes is that canvas.requestPointerLock, canvas.mozRequestPointerLock, canvas.webkitRequestPointerLock don't return false if they don't exist (or true if it does). You have to get the current browser by other means and then call the prefixed method.
Related
I am using GoogleSheets to print a png/image file using HTMLService. I created a temporary Iframe element with an img tag in the modalDialog and call IFrame element's contentWindow.print() function after IFrame element and its image are loaded. (I have not set visibility:hidden attribute of IFrame element to check if image is getting loaded.)
However, I only see the printer dialog without any print preview. I am testing on Firefox. Am I missing anything?
[Updated] - I am using Googles Apps script. performPrint() is in printJsSource.html and openUrl() is in Code.gs.
Inside printJsSource.html
function performPrint(iframeElement, params) {
try {
iframeElement.focus()
// If Edge or IE, try catch with execCommand
if (Browser.isEdge() || Browser.isIE()) {
try {
iframeElement.contentWindow.document.execCommand('print', false, null)
} catch (e) {
iframeElement.contentWindow.print()
}
} else {
// Other browsers
iframeElement.contentWindow.print() // as I am using Firefox, it is coming here
}
} catch (error) {
params.onError(error)
} finally {
//cleanUp(params)
}
}
Inside Code.gs
function openUrl() {
var html = HtmlService.createHtmlOutputFromFile("printJsSource");
html.setWidth(500).setHeight(500);
var ui = SpreadsheetApp.getUi().showModalDialog(html, "Opening ..." );
}
I think there is some general confusion about the concept
First of all, function performPrint() seems to be a client-side Javascript funciton, while function openUrl() is a server-side Apps Script function.
While you did not specify either you use Google Apps Script - if you do so, function openUrl()belongs into the code.gs file and function performPrint() into printJsSource.html file
function openUrl() allows you to open a modal dialog which can show some data on the UI, e.g. your image
Do not confuse this behavior with actual printing (preview)!
It is NOT possible to trigger the opening of a Google Sheets printing preview programamticaly!
The Javascript method you are using iframeElement.contentWindow.print() might trigger the printing of the whole content of a browser window (different from the Google Sheets printing dialog, also depends on the browser), but if you try to incorporate it into the client-side coe of an Apps Script project, you will most likely run into restrictions due to the scopes of modal diloags and usage of iframes.
While from your code it is hard to say either you implemented the funcitons in the correct files of the Apps Script project, keep in mind that to work with iframes you need to specify in function openUrl()
html.setXFrameOptionsMode(HtmlService.XFrameOptionsMode.ALLOWALL);
after several rounds of research, I found there is no clear answer about the situation like below:
I have a js file called 'AAA.js', and there is simple code in side like this:
var AAA = {
listenForMenuLayer: function () {
console.log("menu initiated");
$('.nav-menu').on('click', function() { console.log("menu clicked")});
}
init: function(){
this.listenForMenuLayer();
}
};
And in the dart, I wrote like below (using 'dart:js'):
js.context['AAA'].callMethod('init');
Then, when I run it, everything looks fine, the "menu initiated" shows properly, which means the 'listenForMenuLayer' is initiated, but when click on the '.nav-menu', there is nothing happened. (I check many times, there is no spelling error or else)
My question is: Can Dart accept this kind of initiating of external JS event? or we should re-write those JS events at all, please advise, many thanks.
Updates:
I found that if we write the js code like above, the jquery will not be initiated properly, which means all the features begin with '$' will not be functional.
guys, I update it to using 'package:js/js.dart';
#JS('AAA.init')
external void aInit();
then some where, just simply call after including:
aInit();
I know that my question is not new, but all solutions I've found here and in the Internet are not working :( Or, I'm doing something completely wrong.
I need to create a communication between Dart and JS, and I would love to use events, as the idea seems to be neat and simple.
So, I tried this tutorial: https://dart.academy/easy-dart-js-interopt/
My JS code:
var customEvent = new CustomEvent("fromJavascriptToDart");
window.onload = document.dispatchEvent(customEvent);
document.addEventListener("fromJavascriptToDart", test, false);
function test() {
console.log("Listening");
}
The event is dispatched, as I see Listening in console log.
But when it comes to dart, nothing is working.
I've tried the following methods and everything failed:
document.on['fromJavascriptToDart'].listen((CustomEvent event) {
print("HEY! I'M LISTENING!");
});
window.on["fromJavascriptToDart"].listen((e) => print( "HEY! I'M LISTENING!"));
window.on['foo'].add((e) => print(e.detail)); //This is not working, as there is no add method in Stream Event anymore
#Listen('fromJavascriptToDart')
void eventTest(){
print("HEY! I'M LISTENING!");
}
Any help is mostly appreciated.
DartPad example
document.on['fromJavascriptToDart'].listen((CustomEvent event) {
print("HEY! I'M LISTENING!");
});
Works fine.
#Listen() is Polymer specific
add doesn't exist (listen as show above should be used)
the event doesn't seem to reach window, but I'm sure this will behave the same in pure JS.
I use this code to intercept a dialog from a webview but I can not see the content or interact with it:
Element webview= querySelector("#webview");
Map<String,String> map=new Map();
map["src"]=urlWebView+user;
webview.attributes.addAll(map);
querySelector("#webview_cont").style.visibility="visible";
window.addEventListener("dialog",(Event e){ //Use window or webview returns the same result
e.preventDefault();
... //What should I do here ??
} );
Any solution?
Thanks
Edit
Debug:
Open issue: https://code.google.com/p/dart/issues/detail?id=23556
The problem definitely lies with your usage of Dart's Event class.
It simply does not support the extra properties that Chrome is adding to the event: e.dialog, e.messageText, e.messageType.
It does not seem like there is a ready solution for that, at least not in chrome.dart.
Sadly, I don't know Dart well enough to give you a solution. You need to somehow extend that event class, possibly dropping to JS level.
This library, even if abandoned, should give you ideas on how to do that (by catching the JS-level event and stuffing the extra properties in CustomEvent's detail property), though implementing DialogController (which is not JSON-serializable) would be a bit trickier, I guess.
Does anyone know what might have changed since v3.0.5 that would enable extensions to work? Or, maybe I'm missing a setting somewhere? I wrote this add-on that works fine with newer versions, but I can't get it to launch in older ones. Specifically, I can't even get this part to work (this is in my browser overlay.xul):
<html:script>
<![CDATA[
var Cc = Components.classes;
var Ci = Components.interfaces;
var obSvc = Cc["#mozilla.org/observer-service;1"].getService(Ci.nsIObserverService);
gBrowser.consoleService = Cc["#mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService);
gBrowser.log = function(msg){
this.consoleService.logStringMessage(msg);
}
gBrowser.newObj= new MyAddOn();
gBrowser.log("initializing...");
function regListener()
{
obSvc.addObserver(gBrowser.newObj, "http-on-modify-request", false);
}
function unregListener()
{
obSvc.removeObserver(gBrowser.newObj, "http-on-modify-request");
}
window.addEventListener("load", regListener, false);
window.addEventListener("unload", unregListener, false);
]]>
This should attach listeners to the new obj (defined by a linked .js) However, I'm not even getting the "initializing..." message in the console. Any ideas?
Don't use <html:script>, use <script> (assuming you have xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" on your root <overlay> element).
Don't register an application-global listener (http-on-modify-request) from a window overlay. Doing so will make your code run one time in each window the user may have open. Use an XPCOM component instead - https://developer.mozilla.org/en/Setting_HTTP_request_headers
Don't pollute common objects (like gBrowser or the global object (with var Cc)) with your own properties. If everyone did that, no two extensions would work together. Put all your code properties on your own object with a unique name.
accessing gBrowser before the load event is probably what's causing your specific problem.
Set up your environment and check the Error Console to debug problems.
Don't waste time trying to support Firefox 3. It's not supported by Mozilla itself for over a year and shouldn't be used to access the web.
It looks like gBrowser.log is not defined, or at least is not a function, as the error console will probably tell you. I've never heard of it either. Maybe it was added in Fx 3.5?