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  • Will SerialPort DataRecieved Event Trigger Repeatedly..

    - by Gunner
    Suppose I read data from SerialPort whenever there is 100 or bytes available or else nothing is done. That means, the remaining data will still be available in the SerialPort Buffer. This reading is done inside the event handler of DataReceived. Now If a situation arises, when there there is, say 50 bytes in the SerilaPort Buffer and no more data comes. From what I understand, the DataReceived Event will be triggered when ever there is certain amount of bytes available for reading from the Buffer. Now, in the given scenario, If i never read those 50 bytes, will the Event get activated continuously due to the presence of these unread bytes?

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  • How to save event handlers, when we set new html for element?

    - by Kai
    I have simple html markup: <div id="cont">Some text here <div class="wrap" style="border: 1px solid black;display: inline;"> block element here </div> and another text</div> And jQuery code: $(function(){ $(".wrap").click(function(){ $("#cont").html($("#cont").html().replace(/text/g, "letter")); alert("Click!"); }); $("#d1").click(function(){ alert("#d1 clicked!"); }); }); I expect that click event will be fire any time you clicked by the #d1 div, but when we clicked by .wrap it neve fire again. I understand why it has such behavior, but how to solve it? In my code I can't set click event for #d1 after $("#cont").html($("#cont").html().replace(/text/g, "letter")) because I don't now at execution time if event was set. You can try example on JSBin

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  • How to Detect an Event Coming from the Firefox History Dropdown Box

    - by banterCZ
    How to detect an event coming from the Firefox history dropdown box? I need to distinguish between the enter key simply pressed on input field or on item from his native history dropdown box. The reason is that I would like to call custom submit button (not first one, which is default) on the enter key pressed on any input field. But right now, the enter key pressed on history dropdown box unfortunately call submit as well.

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  • Unable to open executable - xcode

    - by Filipe Mota
    I'm getting this error...any idea how to solve it? GenerateDSYMFile /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app.dSYM /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest cd /Users/fmota/Documents/Developer/Protobuf/PBTest setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/usr/bin/dsymutil /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest -o /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app.dSYM error: unable to open executable '/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest'

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  • Child window focus lost in c#

    - by jestges
    Hi I've two aspx pages ie. page1 and page2. In my Page1 I've a button and in that button click event I try to open page2 (some thing like window.open(page2)) it is working fine. Again I've another button in Page2. When I click Page2 button page1 getting focused. How to prevent this? Any idea?

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  • JavaScript: Very strange behavior with assigning methods in a loop

    - by Andrey
    Consider this code below: <a href="javascript:void(-1)" id="a1">a1</a> <a href="javascript:void(-1)" id="a2">a2</a> <script type="text/javascript"> var buttons = [] buttons.push("a1") buttons.push("a2") var actions = [] for (var i in buttons) { actions[buttons[i]] = function() { alert(i) } } var elements = document.getElementsByTagName("a") for (var k = 0; k < elements.length; k++) { elements[k].onclick = actions[elements[k].id] } </script> Basically, it shows two anchors, a1 and a2, and I expect to see "1" and "2" popping up in an alert when clicking on corresponding anchor. It doesn't happen, I get "2" when clicking on either. After spending an hour meditating on the code, I decided that it probably happens because dynamic onclick methods for both anchors keep the last value of "i". So I change that loop to for (var i in buttons) { var local_i = i.toString() actions[buttons[i]] = function() { alert(local_i) } } hoping that each dynamic function will get its own copy of "i" with immediate value. But after this change I get "1" popping up when I click on either link. What am I doing wrong? It's a huge show stopper for me.

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  • Image container instead of event object in image load event handler

    - by avok00
    I stumbled upon a very strange thing. In FF 3.6 (not tested others yet) I add onload handler to an image like this: imgRef.addEventListener("load", activateLink, false); When load event fires, in activateLink(evt) the evt paramater is not an event, but the "a" tag that contains the image. Why is this? function activateLink(evt) { // evt turns out to be a refference to <a> tag (HTMLAnchorElement) that contains the image. // Actually two of them. Both dynamically added with addElement. } I remembered another fact that may be relevant. I have multiple images with the same src that all have registered this same event handler activateLink. Could this be the problem?

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  • How to improve workflow between developer and designer with Expression Blend?

    - by Amenti
    We use WPF and Expression Blend 4. I'm trying to improve our workflow by tutoring one of our designers to use it for styling and animation. Slowly but surely I get the impression Blend in itself is to technical for the designer in question. I myself use it only occasionally (it's great for Visual States for instance) because a lot of things are easier done in code or not possible at all in Blend alone. It seems a developer with design experience is a lot more productive with it than a sole designer. Are there any good online resources or advice you could give me how to improve this situation?

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  • Core jQuery event modification problem

    - by DSKVR
    I am attempting to overwrite a core jQuery event, in this case the keydown event. My intention is to preventDefault() functionality of Left(37), Up(38), Right(39) and Down(40) to maintain the consistency of hot keys in my web application. I am using the solution provided here for the conditional charCode preventDefault problem. For some reason, my function overwrite is simply not firing, and I cannot put my finger on the problem. I am afraid that over the past 30 minutes this issue has resulted in some hair loss. Anybody have the remedy? /* Modify Keydown Event to prevent default PageDown and PageUp functionality */ (function(){ var charCodes = new Array(37,38,39,40); var original = jQuery.fn.keydown; jQuery.fn.keydown = function(e){ var key=e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0; alert('now why is my keydown mod not firing?'); if($.inArray(key,charCodes)) { alert('is one of them, do not scroll page'); e.preventDefault(); return false; } original.apply( this, arguments ); } })();

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  • What's wrong with addlistener... how do i fire my event

    - by KoolKabin
    I am using the following functions to do my task. It works fine when cursor moves away from textbox but if i want to fire the same event from code say like next function i get error... function addEvent( obj, type, fn ) { if (obj.addEventListener) { obj.addEventListener( type, fn, false ); } else if (obj.attachEvent) { obj["e"+type+fn] = fn; obj[type+fn] = function() { obj"e"+type+fn; } obj.attachEvent( "on"+type, obj[type+fn] ); } else { obj["on"+type] = obj["e"+type+fn]; } } function addEventByName(ObjName, event, func){ MyEle = document.getElementsByName(ObjName); addEvent(MyEle[0], event, func); } addEventByName("txtBox", 'blur', function(){ alert('hello'); }); function fire(){ x = document.getElementsByName('txtBox')[0]; x.blur(); //gives error x.onblur(); //gives error }

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  • How can i check if key is pressed during click event with jquery?

    - by daniel smith
    Hi, I would like to catch a click event with jquery and be able to tell if a key was pressed at the same time so i can fork within the callback function based on the keypress. for example: $("button").click(function() { if([KEYPRESSED WHILE CLICKED]) { do something... } else { do something different... } }); Does anyone know if this is possible at all or how it can be done if it is possible?

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  • JQuery: how to use "delegate" instead of "live"?

    - by JacobD
    I've read countless articles how using the JQuery delegate is much more efficient than using the "live" event. As such, I'm having trouble converting my existing Live code to using Delegate. $("#tabs li:eq(0)").live('click',function(){ //...code }); $('#A > div.listing, #B > div.listing, #C > div.listing').live('mouseover',function(){ // ...code }); When I replace the previous code with what I assume is more efficient delegate code, my page doesn't load. $("#tabs li:eq(0)").delegate('click',function(){ //...code }); $('#A > div.listing, #B > div.listing, #C > div.listing').delegate('mouseover',function(){ // ...code }); Any idea why my delegate code doesn't work? Also, any suggestions on how to make this more efficient? UPDATE: The think part of the problem is that, both "#tabs" and "#A, #B, #C" are't present on the web page at page load. Those attributes are dynamically inserted onto the page with an AJAX call. As such, does that mean I have to use live over delegate?

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  • jQuery li:has(ul) selector issue

    - by sushil bharwani
    I was creating a tree using UL LI list and jQuery. I used a jQuery Selector jQuery(li:has(ul)) to find all the list nodes having childs and then added a click event to it. jQuery(li:has(ul)).click(function(event) { jQuery(this).children.toggle(); jQuery(this).css("cursor","hand"); }); This works for me except i dont understand why i get a cursor hand and click event triggering even when i take mouse pointer to childs of my selected li <li> Parent // it works here that is fine <ul> <li> child1 // it works here i dont understand need explanation </li> <li> child2 // it works here i dont understand need explanation </li> </ul> </li>

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  • MouseWheel Event Fire

    - by Rahat
    I have a problem on calling my private method on MouseWheel event. In fact my mouse wheel event gets fired properly when i only increment a variable or display something in Title bar etc. But when i want to call a private method, that method gets called only one time which is not the requirement i want to call that method depending on the speed of scroll i.e. when scroll is done one time slowly call the private method one time but when the scroll is done in high speed call the private method more than one time depending on the scroll speed. For further explanation i am placing the sample code which displays the value of i in Title bar and add it in the Listbox control properly depending on the scroll speed but when i want to call the private method more than one time depending upon the scroll speed, that method gets called only one time. public partial class Form1 : Form { ListBox listBox1 = new ListBox(); int i = 0; public Form1() { InitializeComponent(); // Settnig ListBox control properties this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.listBox1.FormattingEnabled = true; this.listBox1.Location = new System.Drawing.Point(13, 13); this.listBox1.Name = "listBox1"; this.listBox1.Size = new System.Drawing.Size(259, 264); this.listBox1.TabIndex = 0; // Attaching Mouse Wheel Event this.listBox1.MouseWheel += new MouseEventHandler(Form1_MouseWheel); // Adding Control this.Controls.Add(this.listBox1); } void Form1_MouseWheel(object sender, MouseEventArgs e) { i++; this.Text = i.ToString(); this.listBox1.Items.Add(i.ToString()); // Uncomment the following line to call the private method // this method gets called only one time irrelevant of the // mouse wheel scroll speed. // this.LaunchThisEvent(); } private void Form1_Load(object sender, EventArgs e) { this.listBox1.Select(); } private void LaunchThisEvent() { // Display message each time // this method gets called. MessageBox.Show(i.ToString()); } } How to call the private method more than one time depending upon the speed of the mouse wheel scroll?

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  • Patterns / Solutions to complicated Feature Management

    - by yclian
    Hi all, My company develops CDN / Web-Hosting solution. We have a middleware that's served as a business logic layer and exposes web service for the front-end. I would like to seek for a clean solution to feature management - there're uncertainties and ugly workarounds/solutions in the software that the dev would say "when it happens or is broken, we will fix it". For example, here're the following features that a web publisher can have: Sites limit Bandwidth limit SSL feature + SSL configuration per site If we downgrade a web publisher, when he's having 10 sites, down to 5 sites, we can choose not to suspend the rest of the 5 sites, or we shall prompt for suspension before the downgrade. For the case of bandwidth limit, the downgrade is easy, when the bandwidth check happens, if the publisher has it exceeded, then we will suspend his account. For the case of SSL feature. Every SSL configuration is tied to a site, what shall happen to these configuration object when the SSL feature is downgraded from enabled to disabled? So as you can see, there're many different situations and there are different ways of handling it. I can make a system that examines the impacts and prompts the user to make changes before the downgrade/upgrade. Or a system that ignores the impacts and just upgrade/downgrade. Bad. Or a system designed in a way that the client code need to be aware of the complex feature matrix (or I can expose a helper to the client code to check if a feature is not DEFUNCT) There can be many ways that I am still thinking but puzzled. I am wondering, how would you tackle this issue and is there any recommended patterns or books or software that you think I can refer to? Appreciate your help.

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  • Developer Deep Dive into Oracle WebLogic Server 12c (Dec. 1)

    - by oracletechnet
    It is not often that we are compelled to direct you toward a product launch event. But this one is special. On Dec. 1, Oracle will launch (via live Webcast) Oracle WebLogic Server 12c, a major update to that product. And this release, which includes Java EE 6 support, Active GridLink for Oracle RAC, and Oracle Virtual Assembly Builder, among other things, is specifically designed to improve the process of deploying apps to the cloud. Even better: the Dec. 1 Webcast includes an hour-long, developer-focused deep-dive session in which product experts will answer your questions via live chat. (Register for this session separately.) You don't want to miss this one, folks! 

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  • Unit Test Event Handler

    - by Thomas Tran
    I got this event handle and how can I do unit test for this public class MyLearningEvent { private event EventHandler _Closed; public event EventHandler Closed { add { _Closed -= value; _Closed += value; } remove { _Closed -= value; } } public void OnClosed() { if (_Closed != null) _Closed(this, EventArgs.Empty); } } Just modified code so that much clear Thanks

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  • What are the caveats of the event system built on Messenger rather than on classic .NET events?

    - by voroninp
    MVVM Light and PRISM offer messenger to implement event system. the approximate interface looks like the following one: interface Messanger { void Subscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(objec actionOwner); void Notify<TMessageParam>(TMessageParam param); } Now this model seems beneficial comparing to classic .net events. It works well with Dependency Injection. Actions are stored as weak references so memory leaks are avioded and unsubscribe is not a must. The only annoyance is the need to declare new TMessageParam for each specific message. But everything comes at a cost. And what I'm really worried about is that I see no shortcomings of this approach. Has anoyne the experience of some troubles with this design pattern?

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  • Detecting DOM event support in Firefox

    - by Andy E
    What's the best way to detect event support in Firefox. Opera, Internet Explorer and Safari/Chrome all support eventName in object, but Firefox doesn't. My test case is this: javascript:alert("onclick" in document.createElement("a")) Which alerts true when entered into the address bar on the aforementioned browsers, and alerts false for Firefox. I figured out a solution using typeof on an event like so: var a = document.createElement("a"); a.setAttribute("onclick", ""); alert(typeof(a.onclick) == "function"); Is there a better method of detecting event support in Firefox?

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  • image onclick event not working

    - by heart_throbber
    im tryin to make a onclick event for my image, but its not workin..the alert is not showing up.. $(document).ready(function(){ $('img.closeAttrIcon').click(function(){ alert("ww"); }); }); even if i try like this with ..bind.. no hope... $(document).ready(function(){ $('img.closeAttrIcon').bind('click',function(){ alert("ww"); }); }); the html will be created during this event: $('a#btnAddStdntAttr').click(function(){ var newAttr = '<div class="attrParent"><br class="clear"><label></label><input type="text" id="stdntAttributeKey1" maxlength="250" style="width: 13%;" name="stdntAttributeKey1"/>'; newAttr+= '<input type="text" id="stdntAttributeValue1" maxlength="250" style="width: 13%;" name="stdntAttributeValue1"/>'; newAttr+= '<img src="<c:url value="/static/images/closeIcon.png"/>" onclick="removeStdntAttr();" class="closeAttrIcon" alt="Close" title="Close" /></div>'; $(this).after(newAttr); }); what am i doing wrong here..please help..

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  • move carat to the end of a text input field AND make the end visible

    - by user322384
    I'm going insane. I have an autosuggest box where users choose a suggestion. On the next suggestion selection the value of the text input box exceeds its size. I can move the carat to the end of the input field crossbrowser, no problem. But on Chrome and Safari I cannot SEE the carat at the end. The end of the text is not visible. Is there a way to move the carat to the end of a text input field AND have the end of the field visible so that the user is not confused about where the input carat went? what I got so far: <html> <head><title>Field update test</title></head> <body> <form action="#" method="POST" name="testform"> <p>After a field is updated the carat should be at the end of the text field AND the end of the text should be visible</p> <input type="text" name="testbox" value="" size="40"> <p><a href="javascript:void(0);" onclick="add_more_text();">add more text</a></p> </form> <script type="text/javascript"> <!-- var count = 0; function add_more_text() { var textfield = document.testform.elements['testbox']; textfield.blur(); textfield.focus(); if (count == 0) textfield.value = ''; // clear old count++; textfield.value = (count ? textfield.value : '') + ", " + count + ": This is some sample text"; // move to the carat to the end of the field if (textfield.setSelectionRange) { textfield.setSelectionRange(textfield.value.length, textfield.value.length); } else if (textfield.createTextRange) { var range = textfield.createTextRange(); range.collapse(true); range.moveEnd('character', textfield.value.length); range.moveStart('character', textfield.value.length); range.select(); } // force carat visibility for some browsers if (document.createEvent) { // Trigger a space keypress. var e = document.createEvent('KeyboardEvent'); if (typeof(e.initKeyEvent) != 'undefined') { e.initKeyEvent('keypress', true, true, null, false, false, false, false, 0, 32); } else { e.initKeyboardEvent('keypress', true, true, null, false, false, false, false, 0, 32); } textfield.dispatchEvent(e); // Trigger a backspace keypress. e = document.createEvent('KeyboardEvent'); if (typeof(e.initKeyEvent) != 'undefined') { e.initKeyEvent('keypress', true, true, null, false, false, false, false, 8, 0); } else { e.initKeyboardEvent('keypress', true, true, null, false, false, false, false, 8, 0); } textfield.dispatchEvent(e); } } // --> </script> </body> </html> Thanks

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  • How do I find the previous/default value of a radio button in JS?

    - by royrules22
    I'm not sure if this is even possible, but I figured I'd ask before clubbing togehter an ugly solution. What I have is a group of radio buttons and I want to trigger a function if the radio button value is changed. For example say there are three buttons X Y and Z with Y default selected. If a user clicks on an unselected button (i.e. X or Z) then the function gets triggered but if he/she clicks on Y (which is already selected) nothing happens. Naturally the best solution would be to fire the function on an onchange event but IE6 doesn't fire onchange until the focus is no longer on the element which is not satisfactory. So is there a way to know what the previous value of the radio button was or at least what its default value is? I could easily create an array of default values and check against that but I'm trying to reduce the overhead. Please no jQuery suggestions ;)

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