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  • Jquery nested div .click event

    - by Sylph
    The link #loadContent will loads tree.html. Upon success loading the content, the script reinitialize some functions which is in tree.html. However, I am unable to get the .click event to function in the loaded content. Index.html <a href="#" id="loadContent">Load</a> <script type="text/javascript"> $(function() { $("#loadContent").click(function() { $.ajax({ url: "tree.html" ,success: function(data) { $('#result').html(data); $("#demo_1").tree({ rules : { use_max_children : false, use_max_depth : false }, callback : { onmove : function (NODE,REF_NODE,TYPE,TREE_OBJ,RB) { alert(TREE_OBJ.get_text(NODE) + " " + TYPE + " " + TREE_OBJ.get_text(REF_NODE)); } } }); } }); }); }); </script> <script type="text/javascript" class="source"> $(function () { $.tree.drag_start = function () { $("#log").append("<br />Drag start "); }; $.tree.drag = function () { $("#log").append(" ."); }; $.tree.drag_end = function () { $("#log").append(" Drag end<br />"); }; $("#demo_1").tree({ rules : { use_max_children : false, use_max_depth : false }, callback : { onmove : function (NODE,REF_NODE,TYPE,TREE_OBJ,RB) { alert(TREE_OBJ.get_text(NODE) + " " + TYPE + " " + TREE_OBJ.get_text(REF_NODE)); } } }); $("#demo_2").tree({ rules : { use_max_children : false, use_max_depth : false }, callback : { onmove : function (NODE,REF_NODE,TYPE,TREE_OBJ,RB) { alert(TREE_OBJ.get_text(NODE) + " " + TYPE + " " + TREE_OBJ.get_text(REF_NODE)); } } }); }); </script> <div class="demo" id="demo_2"> <ul> <li id="phtml_1" class="open"><a href="#"><ins>&nbsp;</ins>Root node 1</a> <ul> <li id="phtml_2"><a href="#"><ins>&nbsp;</ins>Child node 1</a></li> <li id="phtml_3"><a href="#"><ins>&nbsp;</ins>Child node 2</a></li> <li id="phtml_4"><a href="#"><ins>&nbsp;</ins>Some other child node with longer text</a></li> </ul> </li> <li id="phtml_5"><a href="#"><ins>&nbsp;</ins>Root node 2</a></li> </ul> </div> <div id="result"></div><br> <div id="log"></div> Tree.html <div class="demo" id="demo_1"> <ul> <li id="phtml_1" class="open"><a href="#"><ins>&nbsp;</ins>Root node 1</a> <ul> <li id="phtml_2"><a href="#"><ins>&nbsp;</ins>Child node 1</a></li> <li id="phtml_3"><a href="#"><ins>&nbsp;</ins>Child node 2</a></li> <li id="phtml_4"><a href="#"><ins>&nbsp;</ins>Some other child node with longer text</a></li> </ul> </li> <li id="phtml_5"><a href="#"><ins>&nbsp;</ins>Root node 2</a></li> <li><a class="preset_text" id="1">model 1</a> </li> <li><a class="preset_text" id="2">model 2</a></li> </ul> </div> <script type="text/javascript"> $(document).ready(function() { $('.preset_text').click(function(){ var target = $(this).attr("id"); alert(target); }); }); </script> In tree.html, I am unable to get the alert(target). However, If I moved this section out from the "div #demo_1" in tree.html, I am able to receive alert(target). <a class="preset_text" id="1">model 1</a> <a class="preset_text" id="2">model 2</a> How can I get to detect the item clicked in the div demo_1 ? Thanks

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  • Android - How to prevent the phone screen from turning on when volume or camera key is pressed?

    - by 2Real
    I have an activity that shows up when the phone screen goes to sleep/turns off ie turns black. For some reason, the phone turns on when the volume buttons or the camera buttons are pressed. By turns on, I mean the screen wakes up or comes back from the black screen state. I've tried using dispatchKeyEvent(KeyEvent event) and the buttons are disabled on the activity, but they still wake up the phone.

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  • Replacing jQuery.live() with jQuery.on()

    - by Rick Strahl
    jQuery 1.9 and 1.10 have introduced a host of changes, but for the most part these changes are mostly transparent to existing application usage of jQuery. After spending some time last week with a few of my projects and going through them with a specific eye for jQuery failures I found that for the most part there wasn't a big issue. The vast majority of code continues to run just fine with either 1.9 or 1.10 (which are supposed to be in sync but with 1.10 removing support for legacy Internet Explorer pre-9.0 versions). However, one particular change in the new versions has caused me quite a bit of update trouble, is the removal of the jQuery.live() function. This is my own fault I suppose - .live() has been deprecated for a while, but with 1.9 and later it was finally removed altogether from jQuery. In the past I had quite a bit of jQuery code that used .live() and it's one of the things that's holding back my upgrade process, although I'm slowly cleaning up my code and switching to the .on() function as the replacement. jQuery.live() jQuery.live() was introduced a long time ago to simplify handling events on matched elements that exist currently on the document and those that are are added in the future and also match the selector. jQuery uses event bubbling, special event binding, plus some magic using meta data attached to a parent level element to check and see if the original target event element matches the selected selected elements (for more info see Elijah Manor's comment below). An Example Assume a list of items like the following in HTML for example and further assume that the items in this list can be appended to at a later point. In this app there's a smallish initial list that loads to start, and as the user scrolls towards the end of the initial small list more items are loaded dynamically and added to the list.<div id="PostItemContainer" class="scrollbox"> <div class="postitem" data-id="4z6qhomm"> <div class="post-icon"></div> <div class="postitemheader"><a href="show/4z6qhomm" target="Content">1999 Buick Century For Sale!</a></div> <div class="postitemprice rightalign">$ 3,500 O.B.O.</div> <div class="smalltext leftalign">Jun. 07 @ 1:06am</div> <div class="post-byline">- Vehicles - Automobiles</div> </div> <div class="postitem" data-id="2jtvuu17"> <div class="postitemheader"><a href="show/2jtvuu17" target="Content">Toyota VAN 1987</a></div> <div class="postitemprice rightalign">$950</div> <div class="smalltext leftalign">Jun. 07 @ 12:29am</div> <div class="post-byline">- Vehicles - Automobiles</div> </div> … </div> With the jQuery.live() function you could easily select elements and hook up a click handler like this:$(".postitem").live("click", function() {...}); Simple and perfectly readable. The behavior of the .live handler generally was the same as the corresponding simple event handlers like .click(), except that you have to explicitly name the event instead of using one of the methods. Re-writing with jQuery.on() With .live() removed in 1.9 and later we have to re-write .live() code above with an alternative. The jQuery documentation points you at the .on() or .delegate() functions to update your code. jQuery.on() is a more generic event handler function, and it's what jQuery uses internally to map the high level event functions like .click(),.change() etc. that jQuery exposes. Using jQuery.on() however is not a one to one replacement of the .live() function. While .on() can handle events directly and use the same syntax as .live() did, you'll find if you simply switch out .live() with .on() that events on not-yet existing elements will not fire. IOW, the key feature of .live() is not working. You can use .on() to get the desired effect however, but you have to change the syntax to explicitly handle the event you're interested in on the container and then provide a filter selector to specify which elements you are actually interested in for handling the event for. Sounds more complicated than it is and it's easier to see with an example. For the list above hooking .postitem clicks, using jQuery.on() looks like this:$("#PostItemContainer").on("click", ".postitem", function() {...}); You specify a container that can handle the .click event and then provide a filter selector to find the child elements that trigger the  the actual event. So here #PostItemContainer contains many .postitems, whose click events I want to handle. Any container will do including document, but I tend to use the container closest to the elements I actually want to handle the events on to minimize the event bubbling that occurs to capture the event. With this code I get the same behavior as with .live() and now as new .postitem elements are added the click events are always available. Sweet. Here's the full event signature for the .on() function: .on( events [, selector ] [, data ], handler(eventObject) ) Note that the selector is optional - if you omit it you essentially create a simple event handler that handles the event directly on the selected object. The filter/child selector required if you want life-like - uh, .live() like behavior to happen. While it's a bit more verbose than what .live() did, .on() provides the same functionality by being more explicit on what your parent container for trapping events is. .on() is good Practice even for ordinary static Element Lists As a side note, it's a good practice to use jQuery.on() or jQuery.delegate() for events in most cases anyway, using this 'container event trapping' syntax. That's because rather than requiring lots of event handlers on each of the child elements (.postitem in the sample above), there's just one event handler on the container, and only when clicked does jQuery drill down to find the matching filter element and tries to match it to the originating element. In the early days of jQuery I used manually build handlers that did this and manually drilled from the event object into the originalTarget to determine if it's a matching element. With later versions of jQuery the various event functions in jQuery essentially provide this functionality out of the box with functions like .on() and .delegate(). All of this is nothing new, but I thought I'd write this up because I have on a few occasions forgotten what exactly was needed to replace the many .live() function calls that litter my code - especially older code. This will be a nice reminder next time I have a memory blank on this topic. And maybe along the way I've helped one or two of you as well to clean up your .live() code…© Rick Strahl, West Wind Technologies, 2005-2013Posted in jQuery   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • Links to Slide Decks from IT Pro Bootcamps

    - by Blog Author
    Here are the links to the slide decks from the IT Pro Bootcamps I have been doing:   http://www.nhcomputerlearning.com/event/1hypervOverSMB.pdf http://www.nhcomputerlearning.com/event/2hypervReplica.pdf http://www.nhcomputerlearning.com/event/3hypervScale.pdf http://www.nhcomputerlearning.com/event/4fileshares.pdf http://www.nhcomputerlearning.com/event/5storage.pdf http://www.nhcomputerlearning.com/event/6hypervShared.pdf http://www.nhcomputerlearning.com/event/7azure.pdf

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  • JQuery click anywhere except certain divs and issues with dynamically added html

    - by jCuga
    I want this webpage to highlight certain elements when you click on one of them, but if you click anywhere else on the page, then all of these elements should no longer be highlighted. I accomplished this task by the following, and it works just fine except for one thing (described below): $(document).click(function() { // Do stuff when clicking anywhere but on elements of class suggestion_box $(".suggestion_box").css('background-color', '#FFFFFF'); }); $(".suggestion_box").click(function() { // means you clicked on an object belonging to class suggestion_box return false; }); // the code for handling onclicks for each element function clickSuggestion() { // remove all highlighting $(".suggestion_box").css('background-color', '#FFFFFF'); // then highlight only a specific item $("div[name=" + arguments[0] + "]").css('background-color', '#CCFFCC'); } This way of enforcing the highlighting of elements works fine until I add more html to the page without having a new page load. This is done by .append() and .prepend() What I suspected from debugging was that the page is not "aware" of the new elements that were added to the page dynamically. Despite the new, dynamically added elements having the appropriate class names/IDs/names/onclicks ect, they never get highlighted like the rest of the elements (which continue to work fine the entire time). I was wondering if a possible reason for why my approach does not work for the dynamically added content is that the page is not able to recognize the elements that were not present during the pageload. And if this is a possibility, then is there a way to reconcile this without a pageload? If this line of reasoning is wrong, then the code I have above is probably not enough to show what's wrong with my webpage. But I'm really just interested in whether or not this line of thought is a possibility.

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  • Pygame camera follow in a 2d tile game

    - by Pipyaddict
    import pygame, sys from pygame.locals import * pygame.init() size = width, height = 480,320 screen = pygame.display.set_mode(size) r = 0 bif = pygame.image.load("map5.png") pygame.display.set_caption("Pygame 2D RPG !") x,y=0,0 movex, movey=0,0 character="boy.png" player=pygame.image.load(character).convert_alpha() while True: for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() sys.exit() if event.type==KEYDOWN: if event.key==K_a: movex=-1 elif event.key==K_d: movex=+1 elif event.key==K_w: movey=-1 elif event.key==K_s: movey=+1 if event.type==KEYUP: if event.key==K_a: movex=0 elif event.key==K_d: movex=0 elif event.key==K_w: movey=0 elif event.key==K_s: movey=0 x+=movex y+=movey screen.fill((r,0,0)) screen.blit(bif,(0,0)) screen.blit(player,(x,y)) pygame.display.flip() Everything works fine except I was wondering how on earth I was going to be able to move the camera where the player goes sorry that I can't show you the map file as you can't add images to it. But Thanks for your time The map is here: https://dl.dropboxusercontent.com/u/110087275/2d%20pygame/map5.png And finally the code is here: https://dl.dropboxusercontent.com/u/110087275/2d%20pygame/2d_pygame.py Thanks again for your time and effort!!!!!

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  • Android SDK - Animation prevents further events on View like OnClick()

    - by Ron
    I have an ImageView which is animated via startAnimation() to slide it into the screen. It is visible and enabled in the XML. When I add a Handler for a delay or an onClick event, nothing happens. When I remove the startAnimation() everything works fine. Except the animation of course. Heres my code: balloon.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { view.setVisibility(View.GONE); } }); Animation dropDown = AnimationUtils.loadAnimation(context, R.anim.balloon_slide_down); dropDown.setStartOffset(1500); balloon.startAnimation(dropDown); Any ideas why that is? I'm quite frustrated by now... Thanks, Ron

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  • trigger jquery click

    - by dio
    Hello everyone, I use jquery to build treeview via ajax which has refreshed automatically every 5 second. And I want after building the tree, one of the branches to be selected automatically. But when I use $('#treeview li span.Running').click(); nothing happen. I catch the click event using $('#treeview li span').live('click',function(){ .... }); I try with jQuery instead of $ and it was unsuccessful. Thank you in advance. BR.

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  • Is there a Java equivalent to libevent?

    - by JoelPM
    I've written a high-throughput server that handles each request in its own thread. For requests coming in it is occasionally necessary to do RPCs to one or more back-ends. These back-end RPCs are handled by a separate queue and thread-pool, which provides some bounding on the number of threads created and the maximum number of connections to the back-end (it does some caching to reuse clients and save the overhead of constantly creating connections). Having done all this, though, I'm beginning to think an event-based architecture would be more efficient. In searching around I haven't found any equivalents to libevent for Java, but maybe I'm not looking in the right place? Mina-statemachine from Apache was the closest thing I found, but it looks more verbose than I need and there's no real release available. Any suggestions?

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  • How to call regular JS function with params within jQuery ?

    - by Kim
    Is there another way to run a regular JS function with params passed than what I use below ? It seems redundant use a on-the-way function to do this. function regularJSfunc(param1,param2) { // do stuff } $(document).ready(function(){ $('#myId').change(function(){ regularJSfunc('data1','data2'); }); } Using a .bind event seems much better, however I am not sure how to access the params. Note: Example below doesnt work. $(document).ready(function(){ $('#myId').bind('change',{'data1','data2'},regularJSfunc); }

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  • How to commit inside a CURSOR Loop?

    - by user320587
    Hi, I am trying to see if its possible to perform Update within a cursor loop and this updated data gets reflected during the second iteration in the loop. DECLARE cur CURSOR FOR SELECT [Product], [Customer], [Date], [Event] FROM MyTable WHERE [Event] IS NULL OPEN cur FETCH NEXT INTO @Product, @Customer, @Date, @Event WHILE @@FETCH_STATUS = 0 BEGIN SELECT * FROM MyTable WHERE [Event] = 'No Event' AND [Date] < @DATE -- Now I update my Event value to 'No Event' for records whose date is less than @Date UPDATE MyTable SET [Event] = 'No Event' WHERE [Product] = @Product AND [Customer] = @Customer AND [Date] < @DATE FETCH NEXT INTO @Product, @Customer, @Date, @Event END CLOSE cur DEALLOCATE cur Assume when the sql executes the Event column is NULL for all records In the above sql, I am doing a select inside the cursor loop to query MyTable where Event value is 'No Event' but the query returns no value even though I am doing an update in the next line. So, I am thinking if it is even possible to update a table and the updated data get reflected in the next iteration of the cursor loop. Thanks for any help, Javid

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  • JQuery: which element was clicked?

    - by centr0
    I have a list with links. These links are links to tables on the same page. What I want to do is whatever link I click in the list it will show its corresponding table and hide all the others. Without adding a different id/class to each link in the list and its corresponding table, is there a way to find out which element was clicked and show() its table? From what I understand JQuery returns an array object on its selector. How can I find out what element of the array was clicked? I've tried to use event.which but I'm a little lost. Help is greatly appreciated!

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  • calling invokeAndWait from the EDT

    - by Aly
    Hi, I have a problem following from my previous problem. I also have the code SwingUtillities.invokeAndWait somewhere else in the code base, but when I remove this the gui does not refresh. If I dont remove it the error I get is: Exception in thread "AWT-EventQueue-0" java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread at java.awt.EventQueue.invokeAndWait(Unknown Source) at javax.swing.SwingUtilities.invokeAndWait(Unknown Source) at game.player.humanplayer.model.HumanPlayer.act(HumanPlayer.java:69) The code in HumanPlayer.act is: public Action act(final Action[] availiableActions) { try { SwingUtilities.invokeAndWait(new Runnable() { @Override public void run() { gui.update(availiableActions); } }); } catch (InterruptedException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } synchronized(performedAction){ while(!hasPerformedAction()){ try { performedAction.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } setPerformedAction(false); } return getActionPerfomed(); }

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  • option & jQuery .click() won't work together

    - by meow
    Hello, this works great in FF but not in IE, Chrome or Safari. $('#countryDropDown option').click(function() { var countryID = $(this).val(); dostuff(); }); // countryDropDown = id of select So, as you can see I want to attach a click event to each option. I alos tried var allOpts = $('#countryDropDown option'), l = allOpts.length, i = 0; for (i = 0; i < l; i += 1) { $(allOpts[i]).click(function() { var countryID = $(this).val(); doStuff(); }); } It still does not want to work in any other browser but FF. What am I doing wrong? Thanks

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  • Spring & Hibernate EJB Events

    - by Miguel Ping
    Is it possible to define a spring-managed EJB3 hibernate listener? I have this definition in my persistence.xml: <properties> <property name="hibernate.ejb.interceptor" value="my.class.HibernateAuditInterceptor" /> <property name="hibernate.ejb.event.post-update" value="my.class.HibernateAuditTrailEventListener" /> </properties> But I would like to manage HibernateAuditInterceptor and HibernateAuditTrailEventListener with spring, so I can do some bean injection (ex: session-scoped bean) within these classes. Is this possible?

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  • How do I determine inactivity in a MVVM application?

    - by Jordan
    I have an MVVM kiosk application that I need to restart when it has been inactive for a set amount of time. I'm using Prism and Unity to facilitate the MVVM pattern. I've got the restarting down and I even know how to handle the timer. What I want to know is how to know when activity, that is any mouse event, has taken occurred. The only way I know how to do that is by subscribing to the preview mouse events of the main window. That breaks MVVM thought, doesn't it? I've thought about exposing my window as an interface that exposes those events to my application, but that would require that the window implement that interface which also seems to break MVVM.

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  • Don’t miss rare Venus transit across Sun on June 5th. Once in a life time event.

    - by Gopinath
    Space lovers here is a rare event you don’t want to miss. On June 5th or 6th of 2012,depending on which part of the globe you live, the planet Venus will pass across Sun and it will not happen again until 2117. During the six hour long spectacular transit you can see the shadow of Venus cross Sun. The transit of Venus occurs in pairs eight years apart, with the previous one taking place in 2004. The next pair of transits occurs after 105.5 & 121.5 years later. The best place to watch the event would be a planetarium nearby with telescope facility. If not you watch it directly but must protect your eyes at all times with proper solar filters. Where can we see the transit? The transit of Venus is going to be clearly visible in Europe, Asia, United States and some part of Australia. Americans will be able to see transit in the evening of Tuesday, June 5, 2012. Eurasians and Africans can see the transit in the morning of June 6, 2012. At what time the event occurs? The principal events occurring during a transit are conveniently characterized by contacts, analogous to the contacts of an annular solar eclipse. The transit begins with contact I, the instant the planet’s disk is externally tangent to the Sun. Shortly after contact I, the planet can be seen as a small notch along the solar limb. The entire disk of the planet is first seen at contact II when the planet is internally tangent to the Sun. Over the course of several hours, the silhouetted planet slowly traverses the solar disk. At contact III, the planet reaches the opposite limb and once again is internally tangent to the Sun. Finally, the transit ends at contact IV when the planet’s limb is externally tangent to the Sun. Event Universal Time Contact I 22:09:38 Contact II 22:27:34 Greatest 01:29:36 Contact III 04:31:39 Contact IV 04:49:35   Transit of Venus animation Here is a nice video animation on the transit of Venus Map courtesy of Steven van Roode, source NASA

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  • How to receive alerts when you centralize your SQL Server Event Logs.

    Learn how you can get alerts when you centralize the Event log. This is part 2 of the previous article "How to centralize your SQL Server Event Logs." What are your servers really trying to tell you? Find out with new SQL Monitor 3.0, an easy-to-use tool built for no-nonsense database professionals.For effortless insights into SQL Server, download a free trial today.

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  • Using WeakReference to resolve issue with .NET unregistered event handlers causing memory leaks.

    - by Eric
    The problem: Registered event handlers create a reference from the event to the event handler's instance. If that instance fails to unregister the event handler (via Dispose, presumably), then the instance memory will not be freed by the garbage collector. Example: class Foo { public event Action AnEvent; public void DoEvent() { if (AnEvent != null) AnEvent(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } If I instantiate a Foo, and pass this to a new Bar constructor, then let go of the Bar object, it will not be freed by the garbage collector because of the AnEvent registration. I consider this a memory leak, and seems just like my old C++ days. I can, of course, make Bar IDisposable, unregister the event in the Dispose() method, and make sure to call Dispose() on instances of it, but why should I have to do this? I first question why events are implemented with strong references? Why not use weak references? An event is used to abstractly notify an object of changes in another object. It seems to me that if the event handler's instance is no longer in use (i.e., there are no non-event references to the object), then any events that it is registered with should automatically be unregistered. What am I missing? I have looked at WeakEventManager. Wow, what a pain. Not only is it very difficult to use, but its documentation is inadequate (see http://msdn.microsoft.com/en-us/library/system.windows.weakeventmanager.aspx -- noticing the "Notes to Inheritors" section that has 6 vaguely described bullets). I have seen other discussions in various places, but nothing I felt I could use. I propose a simpler solution based on WeakReference, as described here. My question is: Does this not meet the requirements with significantly less complexity? To use the solution, the above code is modified as follows: class Foo { public WeakReferenceEvent AnEvent = new WeakReferenceEvent(); internal void DoEvent() { AnEvent.Invoke(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } Notice two things: 1. The Foo class is modified in two ways: The event is replaced with an instance of WeakReferenceEvent, shown below; and the invocation of the event is changed. 2. The Bar class is UNCHANGED. No need to subclass WeakEventManager, implement IWeakEventListener, etc. OK, so on to the implementation of WeakReferenceEvent. This is shown here. Note that it uses the generic WeakReference that I borrowed from here: http://damieng.com/blog/2006/08/01/implementingweakreferencet I had to add Equals() and GetHashCode() to his class, which I include below for reference. class WeakReferenceEvent { public static WeakReferenceEvent operator +(WeakReferenceEvent wre, Action handler) { wre._delegates.Add(new WeakReference<Action>(handler)); return wre; } public static WeakReferenceEvent operator -(WeakReferenceEvent wre, Action handler) { foreach (var del in wre._delegates) if (del.Target == handler) { wre._delegates.Remove(del); return wre; } return wre; } HashSet<WeakReference<Action>> _delegates = new HashSet<WeakReference<Action>>(); internal void Invoke() { HashSet<WeakReference<Action>> toRemove = null; foreach (var del in _delegates) { if (del.IsAlive) del.Target(); else { if (toRemove == null) toRemove = new HashSet<WeakReference<Action>>(); toRemove.Add(del); } } if (toRemove != null) foreach (var del in toRemove) _delegates.Remove(del); } } public class WeakReference<T> : IDisposable { private GCHandle handle; private bool trackResurrection; public WeakReference(T target) : this(target, false) { } public WeakReference(T target, bool trackResurrection) { this.trackResurrection = trackResurrection; this.Target = target; } ~WeakReference() { Dispose(); } public void Dispose() { handle.Free(); GC.SuppressFinalize(this); } public virtual bool IsAlive { get { return (handle.Target != null); } } public virtual bool TrackResurrection { get { return this.trackResurrection; } } public virtual T Target { get { object o = handle.Target; if ((o == null) || (!(o is T))) return default(T); else return (T)o; } set { handle = GCHandle.Alloc(value, this.trackResurrection ? GCHandleType.WeakTrackResurrection : GCHandleType.Weak); } } public override bool Equals(object obj) { var other = obj as WeakReference<T>; return other != null && Target.Equals(other.Target); } public override int GetHashCode() { return Target.GetHashCode(); } } It's functionality is trivial. I override operator + and - to get the += and -= syntactic sugar matching events. These create WeakReferences to the Action delegate. This allows the garbage collector to free the event target object (Bar in this example) when nobody else is holding on to it. In the Invoke() method, simply run through the weak references and call their Target Action. If any dead (i.e., garbage collected) references are found, remove them from the list. Of course, this only works with delegates of type Action. I tried making this generic, but ran into the missing where T : delegate in C#! As an alternative, simply modify class WeakReferenceEvent to be a WeakReferenceEvent, and replace the Action with Action. Fix the compiler errors and you have a class that can be used like so: class Foo { public WeakReferenceEvent<int> AnEvent = new WeakReferenceEvent<int>(); internal void DoEvent() { AnEvent.Invoke(5); } } Hopefully this will help someone else when they run into the mystery .NET event memory leak!

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  • User-Defined Customer Events & their impact (FA Type Profile)

    - by Rajesh Sharma
    CC&B automatically creates field activities when a specific Customer Event takes place. This depends on the way you have setup your Field Activity Type Profiles, the templates within, and associated SP Condition(s) on the template. CC&B uses the service point type, its state and referenced customer event to determine which field activity type to generate.   Customer events available in the base product include: Cut for Non-payment (CNP) Disconnect Warning (DIWA) Reconnect for Payment (REPY) Reread (RERD) Stop Service (STOP) Start Service (STRT) Start/Stop (STSP)   Note the Field values/codes defined for each event.   CC&B comes with a flexibility to define new set of customer events. These can be defined in the Look Up - CUST_EVT_FLG. Values from the Look Up are used on the Field Activity Type Profile Template page.     So what's the use of having user-defined Customer Events? And how will the system detect such events in order to create field activity(s)?   Well, system can only detect such events when you reference a user-defined customer event on a Severance Event Type for an event type Create Field Activities.     This way you can create additional field activities of a specific field activity type for user-defined customer events.   One of our customers adopted this feature and created a user-defined customer event CNPW - Cut for Non-payment for Water Services. This event was then linked on a Field Activity Type Profile and referenced on a Severance Event - CUT FOR NON PAY-W. The associated Severance Process was configured to trigger a reconnection process if it was cancelled (done by defining a Post Cancel Algorithm). Whenever this Severance Event was executed, a specific type of Field Activity was generated for disconnection purposes. The Field Activity type was determined by the system from the Field Activity Type Profile referenced for the SP Type, SP's state and the referenced user-defined customer event. All was working well until the time when they realized that in spite of the Severance Process getting cancelled (when a payment was made); the Post Cancel Algorithm was not executed to start a Reconnection Severance Process for the purpose of generating a reconnection field activity and reconnecting the service.   Basically, the Post Cancel algorithm (if specified on a Severance Process Template) is triggered when a Severance Process gets cancelled because a credit transaction has affected/relieved a Service Agreement's debt.   So what exactly was happening? Now we come to actual question as to what is the impact in having a user-defined customer event.   System defined/base customer events are hard-coded across the entire system. There is an impact even if you remove any customer event entry from the Look Up. User-defined customer events are not recognized by the system anywhere else except in the severance process, as described above.   There are few programs which have routines to first validate the completion of disconnection field activities, which were raised as a result of customer event CNP - Cut for Non-payment in order to perform other associated actions. One such program is the Post Cancel Algorithm, referenced on a Severance Process Template, generally used to reconnect services which were disconnected from other Severance Event, specifically CNP - Cut for Non-Payment. Post cancel algorithm provided by the product - SEV POST CAN does the following (below is the algorithm's description):   This algorithm is called after a severance process has been cancelled (typically because the debt was paid and the SA is no longer eligible to be on the severance process). It checks to see if the process has a completed 'disconnect' event and, if so, starts a reconnect process using the Reconnect Severance Process Template defined in the parameter.    Notice the underlined text. This algorithm implicitly checks for Field Activities having completed status, which were generated from Severance Events as a result of CNP - Cut for Non-payment customer event.   Now if we look back to the customer's issue, we can relate that the Post Cancel algorithm was triggered, but was not able to find any 'Completed' CNP - Cut for Non-payment related field activity. And hence was not able to start a reconnection severance process. This was because a field activity was generated and completed for a customer event CNPW - Cut for Non-payment of Water Services instead.   To conclude, if you introduce new customer events that extend or simulate base customer events, the ones that are included in the base product, ensure that there is no other impact either direct or indirect to other business functions that the application has to offer.  

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  • Limitations of User-Defined Customer Events (FA Type Profile)

    - by Rajesh Sharma
    CC&B automatically creates field activities when a specific Customer Event takes place. This depends on the way you have setup your Field Activity Type Profiles, the templates within, and associated SP Condition(s) on the template. CC&B uses the service point type, its state and referenced customer event to determine which field activity type to generate.   Customer events available in the base product include: Cut for Non-payment (CNP) Disconnect Warning (DIWA) Reconnect for Payment (REPY) Reread (RERD) Stop Service (STOP) Start Service (STRT) Start/Stop (STSP)   Note the Field values/codes defined for each event.   CC&B comes with a flexibility to define new set of customer events. These can be defined in the Look Up - CUST_EVT_FLG. Values from the Look Up are used on the Field Activity Type Profile Template page.     So what's the use of having user-defined Customer Events? And how will the system detect such events in order to create field activity(s)?   Well, system can only detect such events when you reference a user-defined customer event on a Severance Event Type for an event type Create Field Activities.     This way you can create additional field activities of a specific field activity type for user-defined customer events.   One of our customers adopted this feature and created a user-defined customer event CNPW - Cut for Non-payment for Water Services. This event was then linked on a Field Activity Type Profile and referenced on a Severance Event - CUT FOR NON PAY-W. The associated Severance Process was configured to trigger a reconnection process if it was cancelled (done by defining a Post Cancel Algorithm). Whenever this Severance Event was executed, a specific type of Field Activity was generated for disconnection purposes. The Field Activity type was determined by the system from the Field Activity Type Profile referenced for the SP Type, SP's state and the referenced user-defined customer event. All was working well until the time when they realized that in spite of the Severance Process getting cancelled (when a payment was made); the Post Cancel Algorithm was not executed to start a Reconnection Severance Process for the purpose of generating a reconnection field activity and reconnecting the service.   Basically, the Post Cancel algorithm (if specified on a Severance Process Template) is triggered when a Severance Process gets cancelled because a credit transaction has affected/relieved a Service Agreement's debt.   So what exactly was happening? Now we come to actual question as to what are limitations in having user-defined customer event.   System defined/base customer events are hard-coded across the entire system. There is an impact even if you remove any customer event entry from the Look Up. User-defined customer events are not recognized by the system anywhere else except in the severance process, as described above.   There are few programs which have routines to first validate the completion of disconnection field activities, which were raised as a result of customer event CNP - Cut for Non-payment in order to perform other associated actions. One such program is the Post Cancel Algorithm, referenced on a Severance Process Template, generally used to reconnect services which were disconnected from other Severance Event, specifically CNP - Cut for Non-Payment. Post cancel algorithm provided by the product - SEV POST CAN does the following (below is the algorithm's description):   This algorithm is called after a severance process has been cancelled (typically because the debt was paid and the SA is no longer eligible to be on the severance process). It checks to see if the process has a completed 'disconnect' event and, if so, starts a reconnect process using the Reconnect Severance Process Template defined in the parameter.    Notice the underlined text. This algorithm implicitly checks for Field Activities having completed status, which were generated from Severance Events as a result of CNP - Cut for Non-payment customer event.   Now if we look back to the customer's issue, we can relate that the Post Cancel algorithm was triggered, but was not able to find any 'Completed' CNP - Cut for Non-payment related field activity. And hence was not able to start a reconnection severance process. This was because a field activity was generated and completed for a customer event CNPW - Cut for Non-payment of Water Services instead.   To conclude, if you introduce new customer events, you should be aware that you don't extend or simulate base customer events, the ones that are included in the base product, as they are further used to provide/validate additional business functions.  

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  • rich:fileupload inside rich:modalpanel doesnt send uploadcomplete event

    - by Ben
    I'm trying to use the rich:fileupload from inside a rich:modalpanel component. The problem is that, when inside modalpanel, fileupload doesn't doesnt start the fileuploadeventlistener method. The same fileupload component works fine outside of modalpanel. (Although it doesn't rerender the components I ask it to, but that's another topic.) I could find this issue and similar ones on search for "fileupload modalpanel" but no answers. My code is added from a backing bean, but this illustrates it: <a4j:form id="overlayForm"> <rich:modalPanel> <rich:fileupload fileuploadeventlistener="#{mrBean.uploadCompleteListener}"/> </rich:modalPanel> </a4j:form>

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  • There is no web named - Sharepoint Event Hander

    - by Roosh Malai
    I activated following code with feature (web level scope). Now when i add an item to any document library it should create a folder "". No folder is created and no error is given either. can anyone see what's is going on? I got the following from the log file. I found similar code all over google so I am kinda puzzled why is not working in my environment. Thanks using System; using System.Collections.Generic; using System.Text; using Microsoft.SharePoint; namespace AddaFolder { class clAddaFolder : SPItemEventReceiver { public override void ItemAdded(SPItemEventProperties properties) { base.ItemAdded(properties); using (SPSite currentSite = new SPSite(SPContext.Current.Site.Url)) using (SPWeb currentWeb = currentSite.OpenWeb(SPContext.Current.Web.Url)) { try { //SPListTemplateCollection coll = currentWeb.ListTemplates; //Get the current document library link SPList newList = currentWeb.GetList(SPContext.Current.Web.Url); //.Site.Url); //newList = currentWeb.Lists.Add("My TEST Folder",SPFileSystemObjectType.Folder); //newList.Lists.Items.Add("My TEST Folder", SPFileSystemObjectType.Folder); //newList.Update(); SPListItem newListItem; //newListItem = newList.Folders.Add("", SPFileSystemObjectType.Folder, "My Test Folder"); newListItem = newList.Folders.Add(newList.ToString(), SPFileSystemObjectType.Folder, "My Test Folder"); newListItem.Update(); } catch (SPException spEx) { throw spEx; } } } } } 04/03/2010 17:52:44.25 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:52:44.26 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:52:44.27 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:52:44.29 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:52:44.30 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx". 04/03/2010 17:52:44.31 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:52:44.32 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:52:44.34 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:52:44.35 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:52:44.36 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx". 04/03/2010 17:52:51.33 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:52:51.34 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:52:51.35 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:52:51.37 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:52:51.38 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx". 04/03/2010 17:52:51.39 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:52:51.40 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:52:51.41 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:52:51.43 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:52:51.44 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx". 04/03/2010 17:53:02.69 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:53:02.71 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:53:02.72 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:53:02.73 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:53:02.74 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx". 04/03/2010 17:53:02.75 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Shared Documents/Forms/AllItems.aspx". 04/03/2010 17:53:02.76 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/My TEST Doc Library/Forms/AllItems.aspx". 04/03/2010 17:53:02.77 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Calendar/calendar.aspx". 04/03/2010 17:53:02.78 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Tasks/AllItems.aspx". 04/03/2010 17:53:02.79 w3wp.exe (0x00C0) 0x0C88 Windows SharePoint Services General 8kh7 High There is no Web named "/sites/myDevSiteColl/myDevWeb/Lists/Team Discussion/AllItems.aspx".

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  • Add onblur event to ASP.Net MVC's Html.TextBox

    - by justSteve
    What's the correct syntax for an HTML helper (in MVC2) to define an onblur handler where the textbox is generated with code like: <%=Html.TextBox( "ChooseOptions.AddCount" + order.ID, (order.Count > 0) ? AddCount.ToString() : "", new { @class = "{number: true} small-input" } ) thx

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