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• Flex chart ItemRollOver behavior

  - by DannyC

  Hi Guys, I'm trying to prevent a default chart item roll over highlight in a Spark column chart. If you look at any of the chart examples on this page , when you roll over any of the chart series items, they turn a darkened shade of their original colour. This is what I want to prevent. So far I have had no luck with using the itemRollOverColor property, as this only allows you to set it to one specific colour for the whole chart (my app has several different coloured series on the chart at once). Also, trying to leverage the itemRollOver event (with preventDefault() etc) hasn't worked either. Does anyone have any idea what I am missing here? Thanks for reading guys

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• Adding Runtime Intelligence Application Analytics for a library and not an application

  - by brickner

  I want to add usage statistics for a .NET 4.0 library I write on CodePlex. I try to follow the step described here but my problem lies with the fact that what I write is a library and not an application. One of the steps is put the Setup and Teardown attributes. I thought about adding the Setup attribute on a static constructor or a different place that will run once per usage of the library. My problem lies with the Teardown attribute that should be placed on code that ends the usage. I don't know where to put this attribute. Is it possible to get usage statistics on a library? Maybe I can register on an event that will fire when the application unloads the dll?

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• Getting the rows cell to line up with parameters in a sp c# winform

  - by Yaron Buki

  I am using a datagridview on a win app designed in c#2010 express. In the _row leave event of my datagrid I would like to use the TableAdapter.usp_insert() that I created. But how does one match up the data in the cells of the datagridview row to the parameters in the stored procedure. Thanks in advance I appreciate the education. This is what if found so far! Int i; i = datagridview1.SelectedCells[0].RowIndex; ... .... Eventually string id = dataGridView1.Rows[i].cell[0].Value.ToString(); @para1 = id; Etc.. What do you think?

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• jquery hover menu question

  - by vondip

  Hi all, I am developing a small web app that uses jquery quite a lot. In my app a user can hover an image, which becomes bigger after a few seconds, giving him more details. The problem is that when the image enlarges the image, it takes over the area of the nearby images as well. Now, if the user goes over the second red square (numbered as 2) I would like the currently enlarged image to disappear and instead enlarge the image pictured below as square two. I am not much of a painter, but I have attached a small image to help illustrate the problem. In short, How can I tell jquery to detect when the mouse is over red square number two, yet not raising the event if the mouse is over green square. [in my demo picture, hovering on point]

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• Modify Hyperlinkfield text in Gridview

  - by JohnG

  I am stumped on this one. I want to modify the text in a Hyperlinkfield of Gridview after the data is bound to it. I found similar code to this on msdn and I can't get it to work. protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { e.Row.Cells[2].Text = e.Row.Cells[2].Text + "random text"; } I also tried similar code in the Page_PreRender event with no luck. I have also tried calling DataBind() before this one line of code with no help. I always just get "random text" in the cell without the data from the DB. Thanks

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• Collaborative Whiteboard using WebSocket in GlassFish 4 - Text/JSON and Binary/ArrayBuffer Data Transfer (TOTD #189)

  - by arungupta

  This blog has published a few blogs on using JSR 356 Reference Implementation (Tyrus) as its integrated in GlassFish 4 promoted builds. TOTD #183: Getting Started with WebSocket in GlassFish TOTD #184: Logging WebSocket Frames using Chrome Developer Tools, Net-internals and Wireshark TOTD #185: Processing Text and Binary (Blob, ArrayBuffer, ArrayBufferView) Payload in WebSocket TOTD #186: Custom Text and Binary Payloads using WebSocket One of the typical usecase for WebSocket is online collaborative games. This Tip Of The Day (TOTD) explains a sample that can be used to build such games easily. The application is a collaborative whiteboard where different shapes can be drawn in multiple colors. The shapes drawn on one browser are automatically drawn on all other peer browsers that are connected to the same endpoint. The shape, color, and coordinates of the image are transfered using a JSON structure. A browser may opt-out of sharing the figures. Alternatively any browser can send a snapshot of their existing whiteboard to all other browsers. Take a look at this video to understand how the application work and the underlying code. The complete sample code can be downloaded here. The code behind the application is also explained below. The web page (index.jsp) has a HTML5 Canvas as shown: <canvas id="myCanvas" width="150" height="150" style="border:1px solid #000000;"></canvas> And some radio buttons to choose the color and shape. By default, the shape, color, and coordinates of any figure drawn on the canvas are put in a JSON structure and sent as a message to the WebSocket endpoint. The JSON structure looks like: { "shape": "square", "color": "#FF0000", "coords": { "x": 31.59999942779541, "y": 49.91999053955078 }} The endpoint definition looks like: @WebSocketEndpoint(value = "websocket",encoders = {FigureDecoderEncoder.class},decoders = {FigureDecoderEncoder.class})public class Whiteboard { As you can see, the endpoint has decoder and encoder registered that decodes JSON to a Figure (a POJO class) and vice versa respectively. The decode method looks like: public Figure decode(String string) throws DecodeException { try { JSONObject jsonObject = new JSONObject(string); return new Figure(jsonObject); } catch (JSONException ex) { throw new DecodeException("Error parsing JSON", ex.getMessage(), ex.fillInStackTrace()); }} And the encode method looks like: public String encode(Figure figure) throws EncodeException { return figure.getJson().toString();} FigureDecoderEncoder implements both decoder and encoder functionality but thats purely for convenience. But the recommended design pattern is to keep them in separate classes. In certain cases, you may even need only one of them. On the client-side, the Canvas is initialized as: var canvas = document.getElementById("myCanvas");var context = canvas.getContext("2d");canvas.addEventListener("click", defineImage, false); The defineImage method constructs the JSON structure as shown above and sends it to the endpoint using websocket.send(). An instant snapshot of the canvas is sent using binary transfer with WebSocket. The WebSocket is initialized as: var wsUri = "ws://localhost:8080/whiteboard/websocket";var websocket = new WebSocket(wsUri);websocket.binaryType = "arraybuffer"; The important part is to set the binaryType property of WebSocket to arraybuffer. This ensures that any binary transfers using WebSocket are done using ArrayBuffer as the default type seem to be blob. The actual binary data transfer is done using the following: var image = context.getImageData(0, 0, canvas.width, canvas.height);var buffer = new ArrayBuffer(image.data.length);var bytes = new Uint8Array(buffer);for (var i=0; i<bytes.length; i++) { bytes[i] = image.data[i];}websocket.send(bytes); This comprehensive sample shows the following features of JSR 356 API: Annotation-driven endpoints Send/receive text and binary payload in WebSocket Encoders/decoders for custom text payload In addition, it also shows how images can be captured and drawn using HTML5 Canvas in a JSP. How could this be turned in to an online game ? Imagine drawing a Tic-tac-toe board on the canvas with two players playing and others watching. Then you can build access rights and controls within the application itself. Instead of sending a snapshot of the canvas on demand, a new peer joining the game could be automatically transferred the current state as well. Do you want to build this game ? I built a similar game a few years ago. Do somebody want to rewrite the game using WebSocket APIs ? :-) Many thanks to Jitu and Akshay for helping through the WebSocket internals! Here are some references for you: JSR 356: Java API for WebSocket - Specification (Early Draft) and Implementation (already integrated in GlassFish 4 promoted builds) Subsequent blogs will discuss the following topics (not necessary in that order) ... Error handling Interface-driven WebSocket endpoint Java client API Client and Server configuration Security Subprotocols Extensions Other topics from the API

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• Manipulating individual rows of a datagrid

  - by pfranchise

  Hey, recently I started working on a webpage that has a datagrid. I understand how to add datasources and that sort of thing, or at least I am starting to get it. But my question is about manipulating individual rows or cells. Is that only possible during the databind event handler, that is the only place I have been able to do it so far. I am sure there is a more abstract way of doing the things I want to do, but there are times where I just want to say Datagrid.add(row). I mean, if the datagrid is made up of a certain object type, can I make a new object of that type and just chuck it on the end? I am still new to this stuff, so perhaps what I want to do would defeat the purpose of this added abstraction, but figured I would ask around. Thanks for any advice, tips, or tricks people feel like sharing. Edit: for clarification I am using c#, entity framework, asp.net, and an SQL database.

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• How do I do a join in ActiveRecord after records have been returned?

  - by Russ Bradberry

  I am using ActiveRecord in Rails 3 to pull data from two different tables in two different databases. These databases can not join on each other, but I have the need to do a simple join after-the-fact. I would like to preserve the relation so that I can chain it down the line. here is a simplified version of what I am doing browsers = Browser.all # <-- this is fairly small and can reside in memory events = Event.where(:row_date=>Date.today).select(:name, :browser_id) So as you can see, I want to join browsers in on the events relation, where browser_id should equal browsers.name. events is a relation and I can still add clauses to it down the line, so I dont want to run the query on the db just yet. How would I accomplish this?

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• How to keep the popup menu of a JComboBox open on populating it ?

  - by Stormshadow

  I have a JComboBox on my Panel. One of the popup menu items is 'More' and when I click that I fetch more menu items and add them to the existing list. After this, I wish to keep the popup menu open so that the user realizes that more items have been fetched however, the popup closes. The event handler code I am using is as follows public void actionPerformed(ActionEvent e) { if (e.getSource() == myCombo) { JComboBox selectedBox = (JComboBox) e.getSource(); String item = (String) selectedBox.getSelectedItem(); if (item.toLowerCase().equals("more")) { fetchItems(selectedBox); } selectedBox.showPopup(); selectedBox.setPopupVisible(true); } } private void fetchItems(JComboBox box) { box.removeAllItems(); /* code to fetch items and store them in the Set<String> items */ for (String s : items) { box.addItem(s); } } I do not understand why the showPopup() and setPopupVisible() methods are not functioning as expected.

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• Javascript parent page redirection from iframe.

  - by Danil

  Hello to all. I need to implement parent page redirection from iframe. I know that it is impossible to do in different domains due to browsers security. However I found that links have target attribute and tried to use it in the following way: <a href="http://google.com" target="_top" id="testParentRedirect">someLink</a> It works fine if I click this link manually, but I couldn't find cross-browser solution to simulate it using javascript. document.getElementById('testParentRedirect').click(); This works fine in IE, however Firefox and Safary don't know click function :). I tried to work with jquery, but for some reason they don't simulate click event for links. (see following post) I couldn't find any appropriate solution on stackoverflow. Maybe someone could help me in it. I will appreciate it. :)

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• Processing Text and Binary (Blob, ArrayBuffer, ArrayBufferView) Payload in WebSocket - (TOTD #185)

  - by arungupta

  The WebSocket API defines different send(xxx) methods that can be used to send text and binary data. This Tip Of The Day (TOTD) will show how to send and receive text and binary data using WebSocket. TOTD #183 explains how to get started with a WebSocket endpoint using GlassFish 4. A simple endpoint from that blog looks like: @WebSocketEndpoint("/endpoint") public class MyEndpoint { public void receiveTextMessage(String message) { . . . } } A message with the first parameter of the type String is invoked when a text payload is received. The payload of the incoming WebSocket frame is mapped to this first parameter. An optional second parameter, Session, can be specified to map to the "other end" of this conversation. For example: public void receiveTextMessage(String message, Session session) {     . . . } The return type is void and that means no response is returned to the client that invoked this endpoint. A response may be returned to the client in two different ways. First, set the return type to the expected type, such as: public String receiveTextMessage(String message) { String response = . . . . . . return response; } In this case a text payload is returned back to the invoking endpoint. The second way to send a response back is to use the mapped session to send response using one of the sendXXX methods in Session, when and if needed. public void receiveTextMessage(String message, Session session) {     . . .     RemoteEndpoint remote = session.getRemote();     remote.sendString(...);     . . .     remote.sendString(...);    . . .    remote.sendString(...); } This shows how duplex and asynchronous communication between the two endpoints can be achieved. This can be used to define different message exchange patterns between the client and server. The WebSocket client can send the message as: websocket.send(myTextField.value); where myTextField is a text field in the web page. Binary payload in the incoming WebSocket frame can be received if ByteBuffer is used as the first parameter of the method signature. The endpoint method signature in that case would look like: public void receiveBinaryMessage(ByteBuffer message) {     . . . } From the client side, the binary data can be sent using Blob, ArrayBuffer, and ArrayBufferView. Blob is a just raw data and the actual interpretation is left to the application. ArrayBuffer and ArrayBufferView are defined in the TypedArray specification and are designed to send binary data using WebSocket. In short, ArrayBuffer is a fixed-length binary buffer with no format and no mechanism for accessing its contents. These buffers are manipulated using one of the views defined by one of the subclasses of ArrayBufferView listed below: Int8Array (signed 8-bit integer or char) Uint8Array (unsigned 8-bit integer or unsigned char) Int16Array (signed 16-bit integer or short) Uint16Array (unsigned 16-bit integer or unsigned short) Int32Array (signed 32-bit integer or int) Uint32Array (unsigned 16-bit integer or unsigned int) Float32Array (signed 32-bit float or float) Float64Array (signed 64-bit float or double) WebSocket can send binary data using ArrayBuffer with a view defined by a subclass of ArrayBufferView or a subclass of ArrayBufferView itself. The WebSocket client can send the message using Blob as: blob = new Blob([myField2.value]);websocket.send(blob); where myField2 is a text field in the web page. The WebSocket client can send the message using ArrayBuffer as: var buffer = new ArrayBuffer(10);var bytes = new Uint8Array(buffer);for (var i=0; i<bytes.length; i++) { bytes[i] = i;}websocket.send(buffer); A concrete implementation of receiving the binary message may look like: @WebSocketMessagepublic void echoBinary(ByteBuffer data, Session session) throws IOException {    System.out.println("echoBinary: " + data);    for (byte b : data.array()) {        System.out.print(b);    }    session.getRemote().sendBytes(data);} This method is just printing the binary data for verification but you may actually be storing it in a database or converting to an image or something more meaningful. Be aware of TYRUS-51 if you are trying to send binary data from server to client using method return type. Here are some references for you: JSR 356: Java API for WebSocket - Specification (Early Draft) and Implementation (already integrated in GlassFish 4 promoted builds) TOTD #183 - Getting Started with WebSocket in GlassFish TOTD #184 - Logging WebSocket Frames using Chrome Developer Tools, Net-internals and Wireshark Subsequent blogs will discuss the following topics (not necessary in that order) ... Error handling Custom payloads using encoder/decoder Interface-driven WebSocket endpoint Java client API Client and Server configuration Security Subprotocols Extensions Other topics from the API

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• How to query_posts after the current timestamp and sort reverse chronologically?

  - by Jody Heavener

  I am using the following code in Wordpress to query events (custom post type) and order them by date chronologically.. query_posts( array( 'post_type' => 'events', 'showposts' => 10, 'orderby' => 'meta_value_num','meta_key' => '_ecmb_datetime' ) ); Where the meta key _ecmb_datetime is, this is the timestamp of the event. I don't want to show events that have already happened, so my question is how do I only show events happening after my current time, and how do I sort reverse chronologically? Any help is greatly appreciated

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• use boolean with visible, as3

  - by VideoDnd

  Is there a better way to do use a use a boolean with visible? This animation blinks 30 times and stops. It works without error, but takes a moment to load. I would like to learn other ways of using visibility with conditionals. var timz:Timer = new Timer(100,30); timz.addEventListener(TimerEvent.TIMER, doIt); var condition:Number = 5; function doIt(event:TimerEvent):void{ trace("fire!"); if(condition=5){ box.visible = !box.visible; } } timz.start();

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• How can I prevent a ToggleButton from being Toggled without setting IsEnabled=False

  - by Bryan Anderson

  I have a list of ToggleButtons being used as the ItemTemplate in a ListBox similar to this answer using the MultiSelect mode of the Listbox. However I need to make sure at least one item is always selected. I can get the proper behavior from the ListBox by just adding an item back into the ListBox's SelectedItems collection on the ListBox.SelectionChanged event but my ToggleButton still moves out of its toggled state so I think I need to stop it earlier in the process. I would like to do it without setting IsEnabled="False" on the last button Selected because I'd prefer to stay with the Enabled visual style without having to redo my button templates. Any ideas?

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• How to create a GUI inside a function in Matlab?

  - by Paperflyer

  Is there a possibility to write a GUI from inside a function? The Problem is: The callback of all GUI-functions work in the global workspace. But functions have their own workspace and can not access variables in the global workspace. Is there a possibility to make the GUI-functions use the workspace of the function? function myvar = myfunc() myvar = true; h_fig = figure; % create a useless button uicontrol( h_fig, 'style', 'pushbutton', ... 'string', 'clickme', ... 'callback', 'myvar = false' ); % wait for the button to be pressed while myvar pause( 0.2 ); end close( h_fig ); disp( 'this will never be displayed' ); end This event-loop will run indefinitely, since the callback will not modify myvar in the function. Instead it will create a new myvar in the global workspace.

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• Customize Annotation problem....Plz Help.. !!

  - by user128647

  I want to show my custom UIView(.Xib View) to appear when user tabbed on pins (not apple's callOutBubble) and in that UIView there should be a button which fires an IBAction on touched down event. Therefore i have added an AddObserver method to MKAnnotationView. which responds to touch events over pin in MKMapView. But i have also added 3 buttons over that XIB view, which have also assined IBActions. But when i run application, Buttons in Customized Annotation view are not responding to IBAction (Touch Down)? Why this happens ?? What is the solution for that??? I need to have called some method, when those 3 buttons tabbed. Thanks

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• Show extra info for Preference screens when CheckboxPreference summary field is not enough long?

  - by Pentium10

  I have situation when you can enabled/disable modules for my Android application. For this I use a CheckboxPreference screen. This is all good, but the summary field gets cut off if longer descriptions are added than 2 lines. Suppose I have 4-5 lines of description available for each module, I would like to display this in a helper window. I tried to bind a click event to the CheckboxPreference, but that fires for the whole line, so not only when the checkbox is clicked, and more, where ever you click on the line the checkbox is toggled. So now I am wondering if this can be fixed. So if the user needs more info, just taps the text and the helper opens up, and if want to toggle the settings it taps the checkbox. How would you do it? I am open to other ideas too, if they do work.

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• Postgres : Post statement (or insert) asynchronous, non-blocking processing.

  - by Hassan Syed

  I'm wondering if it is possible, that after a collection of rows is inserted, to initiate an operation that is executed asynchronously, is non-blocking, and doesn't need to inform the originator of the request - of the result. I am working with large amounts of events and I can guarantee that the post-insert logic will not fail -- I just want to have a single insert thread in my event-sources, and I want this thread to keep flying without blocking, and without being responsible for any post-delivery book-keeping. I can tell you that I would potentially have a 100 of these jobs executing concurrently and each job might operate on 5 tables with anywhere between 200-1000 inserts on each of these tables. A hint in the right direction should be enough.

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• fb.init events when initialized

  - by oshafran

  Hi I have this code window.fbAsyncInit = function() { FB.init({ appId: 'balblablablbal', status: true, cookie: true, xfbml: false }); }; (function() { var e = document.createElement('script'); e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js'; e.async = true; document.getElementById('fb-root').appendChild(e); } ()); I would like to do something only after those JSs have been loaded (i.e. hook on FB.init event) How can I do that thanks

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• jQuery resetting value of form input when hidden

  - by RyanP13

  Hi, I am trying to clear the value attribute of an 'Other' form input when it is hidden from the user like so: // hide 'Other' inputs to start $('.jOther').hide(); // event listener on all select drop downs with class of jTitle $("select.jTitle").change(function(){ //set the select value var $titleVal = $(this).val(); if($titleVal != 'Other') { $(this).parent().find('.jOther').hide(); $(this).parent().find('input.jOther').attr("value", ""); } else { $(this).parent().find('.jOther').show(); } // Sets a cookie with named after the title field's ID attribute var $titleId = $(this).attr('id'); $.cookies.set('cpqb' + $titleId, $titleVal); }); It doesn't seem to be working and i have tried the following to no avail as well: $(this).parent().find('input.jOther').val(""); I have managed to alter other attributes in this way, such as the name, maxlength etc. Any ideas?

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• MS-Access 2007 Runtime SendObject Crash

  - by ccraiff

  I have programmed an Access Database program using Access 2007. I have a button that points to the event: DoCmd.SendObject acSendReport to have it email a PDF report (acFormatPDF). Everything works fine in the normal Access 2007 program, but when a user opens the program with Access 2007 Runtime, when clicking on this button it goes through the normal steps (notifying Outlook, waiting for Allow/Deny clearance), and then after you click Allow, the program crashes with a Runtime Error. Does anybody know what is going on here? Is this a normal error with Access Runtime? I have tried other file formats (RTF and XLS) instead of PDF, but it seems to be the SendObject command that is crashing the Runtime Environment? Clarification: Access Runtime does not output an error code upon this crash. Just a window stating a "runtime error has occurred".

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• How to get notification when window closes in Firefox extension?

  - by Yashwant Kumar Sahu

  Hello experts I am making toolbar in Mozilla Firefox. On the click of a button on my toolbar, I am opening a new window which navigates to my HTML Page created by me. On this HTML Page on the click of a button I am doing some work and closing the window. That's all done, now I need my original or parent window's toolbar to get notified when this window is closed. I guess adding event listeners won't work as its all done in new window. Please suggest. Any help is apprectiated

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• Unit testing custom controls in Silverlight

  - by Hrvoje

  I have several custom controls (some kind of frames for content and layout management, like wrap panel), and would like to write unit tests for them. It's hard to find any good examples except Silverlight control toolkit, which has some helper classes to do unit tests and it's quite complicated. For MVVM classes it's easy to write tests because they don't use SL dependency system and infrastructure. Questions: how to unit test DepedenyProperty, what do I need to test how to test attached property do I test bindings with theme or UserControl, like simple textblock content binding, or command/event binding in MVVM with UserControl what else do I test in my custom controls, beside my business logic any good tutorial to achieve tests like those in control toolkit How do I start? Is SL controls toolkit only option for learning? For testing framework i'm using one from control toolkit, and for continuus integration on TFS build server I planned to use Statlight (from codeplex). Any advice on that?

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• jQuery get value from checked element with a given name

  - by Travis Leleu

  I've got an input like so: I'd like to use jQuery to grab that element, and add the function call foo() to the change event. Currently I can get it done, but there are two hacks involved. My (working) code: $(":input[name*=myfield]").change( function( $(":input[name*=myfield]") ) { foo(); }); )}; There are two hacks in there I'd like to eliminate. Keeping in mind that the input names are multidimensional arrays, how can I use the :input[name=somename], versus [name*=someone]? I'd imagine it's faster using an exact name rather than *=, but I can't get the escape sequence correct for the brackets on the multidimensional arrays. Can I chain the call together so that I don't have to select the element twice? Is the standard practice for that to select the HTML element into a var, then use that var? Or can I chain it together? Thanks for the help. Still working on getting my footing in JS/JQ.

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• javascript getting complete code of element when mouseover or onclick

  - by oimoim

  Hi, How can I get the complete html code of the element i'm mouseovering or clicking ? Using document.onmouseover = function(e){ can I get the full underlying html code of the element which triggered the event ? Right now, I am able to get the tag name or id or whatever. What I would like is the whole code. For example; if I'm mouseovering a table, I would like to get the string : <table><tr><td></td></tr></table> Is this possible ?

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