I'm a beginner with XUL. I have the following problem.
In the browser overlay I declare a menu item which opens a new window - so far so good.
menu_entry.addEventListener('command', function() {
window.open('chrome://myextension/content/mywindow.xul',
'myextension-mywindow',
'chrome,centerscreen');
}, false);
I'd like this to be more flexible. If the window is already open, it should be focused instead. This is what I have tried
menu_entry.addEventListener('command', function() {
let mywindow = document.getElementById('myextension-mywindow');
if (mywindow) {
mywindow.focus();
}
else {
window.open('chrome://myextension/content/mywindow.xul',
'myextension-mywindow',
'chrome,centerscreen');
}
}, false);
The problem is that document.getElementById('myextension-mywindow') always returns null, so I never enter the if. I guess this is because the window is another chrome in itself.
But if this is so, how can I make the windows interact with each other? Is it possible to focus a window from a widget in another window? I cannot do this from a module, since document and window are not available there.
I finally found I have to use the nsiWindowMeditator. All I had to do is
menu_entry.addEventListener('command', function() {
let windowManager = Cc['#mozilla.org/appshell/window-mediator;1'].
getService(Ci.nsIWindowMediator);
let mywindow = windowManager.getMostRecentWindow('mywindowtype');
if (mywindow) {
mywindow.focus();
}
else {
window.open('chrome://myextension/content/mywindow.xul',
'myextension-mywindow',
'chrome,centerscreen');
}
}, false);
and then in the xul
<window id="myextension-mywindow" windowtype="mywindowtype>
...
</window>
Related
I have been building an app in Adobe AIR using HTML/JavaScript.
The windows are all Chromeless and use CSS to style them to look like an application.
How can I detect if the window is focused by the user so I can alter the colours of the windows in the same way that native windows have more subtle shadows etc.
An example might be:
var active = false;
$(document).ready(function() {
active = nativeWindow.active;
if(active) {
$('body').addClass('active');
} else {
$('body').removeClass('active');
}
});
But how do I properly handle the change of active event?
You can do this with: air.NativeWindow.active. See: http://help.adobe.com/en_US/air/reference/html/flash/display/NativeWindow.html#active
UPDATE:
window.nativeWindow.addEventListener(air.Event.ACTIVATE, function() {
$('body').addClass('active');
});
window.nativeWindow.addEventListener(air.Event.DEACTIVATE, function() {
$('body').removeClass('active');
});
i am working in extjs4. i have form panel with autoscroll true. I have 20-25 fields with fileUpload field at bottom. When i am uploading file, form's scroll is going to top by default. i want to keep scroll of form as it is on where it was while uploading file. So how to set this scrollBar at bottom of or at upload field section in extjs4
You can try by adding the following method to your form declaration:
scrollToField: function(fieldId) {
var field = Ext.get(fieldId);
field.el.scrollIntoView(this.body.el);
}
Here you have a working sample
IMHO,it will be better, however, to group fields using tabs or something similar to avoid having a long a and hard to read / fill form
I have solve this problem into Ext js 4.2 for Ext.form.panel
See the following code. It will helpful to you.
onRender function call on render event
onRender: function () {
this.callParent(arguments);
if (!this.restoreScrollAfterLayout) {
this.mon(Ext.get(this.getEl().dom.lastElementChild), 'scroll', this.onScroll, this);
this.restoreScrollAfterLayout = true;
}
},
onScroll: function (e ,t, eOpts) {
this.scroll = Ext.get(this.getEl().dom.lastElementChild).getScroll();
},
afterLayout: function () {
this.callParent(arguments);
if (this.restoreScrollAfterLayout && this.scroll) {
var el = Ext.get(this.getEl().dom.lastElementChild),
scroll = this.scroll;
el.scrollTo('left', scroll.left);
el.scrollTo('top', scroll.top);
}
}
I have a requirement to disable the escape key when the dialog is open.currently when i click the escape button the dialog closes and the transaction is submitting.I tried the following code snippet but its not working chrome.
dojo.connect(dialog, "onKeyPress", function(e){
var key = e.keyCode || e.charCode;
var k = dojo.keys;
if (key == k.ESCAPE) {
event.preventDefault();
d.stopEvent(event);
}
});
Could you please help on this..i have searched a lot and havent found a suitable solution for my problem.
Thanks inadvance..
Dojo uses the _onKey event for accessibility. You can override it by using:
dialog._onKey = function() { }
I wrote an example JSFiddle, hitting the Escape key should not work anymore.
In the event you want to override the escape key in all dialogs (rather than a particular instance), you can use dojo/aspect:
require(['dojo/aspect', 'dijit/Dialog'], function (Aspect, Dialog) {
Aspect.around(Dialog.prototype, '_onKey', function (original) {
return function () { }; // no-op
});
});
You can create an extension for the Dialog widget like this in a new file:
define(["dojo/_base/declare", "dijit/Dialog"],
function(declare, Dialog){
return declare(Dialog, {
//Prevents the 'ESC' Button of Closing the dialog
_onKey: function() { }
});
});
save the file into dojo Directory (say: dojo/my/my_dialog.js),
and instead of calling: 'dijit/Dialog', just call: 'my/my_dialog'.
this will save you the hard work of editing each Dialog call,
And the same thing to the "dojox/widget/DialogSimple" Widget.
I'd just like to create a new window from the background page and put it in back. I tried focused:false but it doesn't seem to make the trick. I tried to save the previous windowId and tabId and update it after having creating the new window but it doesn't solve the problem neither.
Do you know how we can do that?
Here is my code:
function saveTabId() {
// Get the current tab
chrome.tabs.getSelected(null,function(tab){
if (tab != 'undefined') {
if (tab.windowId != windowId) {
currentTabId = tab.id;
currentWindowId = tab.windowId;
}
chrome.windows.create({url:"http://www.google.com", width:100, height:100, top:0, left:0, focused:false}, function() {
chrome.tabs.get(currentTabId, function(tab) {
chrome.windows.update(tab.windowId, {}, function(w) {
chrome.tabs.update(tab.id, {selected:true});
});
});
});
}
});
}
I launched this code at the beginning of background.html and when I refresh the extension, the window is on top of the extensions tab.
P.S: something more strange the window is on top of the extensions tab and when I change tab in this window, the new window stays on top of the other one even if I click and type text in the other one...
I got it kind of working, but popup window is still showing up for a moment before going underneath the current window:
chrome.windows.create({url:"http://www.google.com", width:100, height:100, top:0, left:0, focused:false}, function() {
chrome.windows.update(currentWindowId, {focused:true});
});
Thanks, here is the code I'm using now. The problem in the code of the question was the focus to the other window before updating it. It is strange, when you focus on a window, it doesn't show it on top of the others.
function focusTab(tabId) {
chrome.tabs.get(tabId, function(tab) {
chrome.windows.update(tab.windowId, {}, function(w) {
chrome.tabs.update(tab.id, {selected:true});
});
});
}
Is it possible to detect when a user is printing something from their browser?
To complicate matters, if we are presenting a user with a PDF document in a new window is it possible to detect the printing of that document ( assuming the user prints it from the browser window)?
The closest I've been able to find is if we implement custom print functionality (something like this) and track when that is invoked
I'm primarily interested in a solution that works for internet explorer (6 or later)
You can now detect a print request in IE 5+, Firefox 6+, Chrome 9+, and Safari 5+ using the following technique:
(function() {
var beforePrint = function() {
console.log('Functionality to run before printing.');
};
var afterPrint = function() {
console.log('Functionality to run after printing');
};
if (window.matchMedia) {
var mediaQueryList = window.matchMedia('print');
mediaQueryList.addListener(function(mql) {
if (mql.matches) {
beforePrint();
} else {
afterPrint();
}
});
}
window.onbeforeprint = beforePrint;
window.onafterprint = afterPrint;
}());
I go into more detail into what this is doing and what it can be used for at http://tjvantoll.com/2012/06/15/detecting-print-requests-with-javascript/.
For Internet Exploder, there are the events window.onbeforeprint and window.onafterprint but they don't work with any other browser and as a result they are usually useless.
They seem to work exactly the same for some reason, both executing their event handlers before the printing window opens.
But in case you want it anyway despite these caveats, here's an example:
window.onbeforeprint = function() {
alert("Printing shall commence!");
}
For anyone reading this on 2020.
The addListener function is mostly deprecated in favor of addEventListener except for Safari:
if (window.matchMedia) {
const media = window.matchMedia("print");
const myFunc = mediaQueryList => {
if (mediaQueryList.matches) {
doStuff();
}
};
try {
media.addEventListener("change", myFunc);
} catch (error) {
try {
media.addListener(myFunc);
} catch (error) {
console.debug('Error', error)
}
}
}
Reference: This other S.O question
If it's only for tracking purposes, perhaps you could set a background url in CSS print media to a server page (.aspx, .php, etc) and then do something on the server?
This guy claims it works.
This is not as versitile as TJ's solution, but it may be less buggy (see TJs blog post for issues he found) when only tracking is needed.