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  • WPF Dispatcher {"The calling thread cannot access this object because a different thread owns it."}

    - by user359446
    first I need to say that I´m noob with WPF and C#. Application: Create Mandelbrot Image (GUI) My disptacher works perfektly this this case: private void progressBarRefresh(){ while ((con.Progress) < 99) { progressBar1.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { progressBar1.Value = con.Progress; } )); } } I get the Message (Title) when tring to do this with the below code: bmp = BitmapSource.Create(width, height, 96, 96, pf, null, rawImage, stride); this.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { img.Source = bmp; ViewBox.Child = img; //vllt am schluss } )); I will try to explain how my program works. I created a new Thread (because GUI dont response) for the calculation of the pixels and the colors. In this Thread(Mehtod) I´m using the Dispatcher to Refresh my Image in the ViewBox after the calculations are ready. When I´m dont put the calculation in a seperate Thread then I can refresh or build my Image.

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  • C++ this as thread parameter, variables unavailable

    - by brecht
    I have three classes: class Rtss_Generator { int mv_transfersize; } class Rtss_GenSine : Rtss_Generator class Rtss_GenSineRpm : Rtss_GenSine Rtss_GenSine creates a thread in his constructer, it is started immediatly and the threadfunction is off-course declared static, waiting for an event to start calculating. the problem: all the variables that are accessed through the gen-pointer are 0, but it does not fail. Also, this-address in the constructer and the gen-pointer-address in the thread are the same, so the pointer is ok. this code is created and compile in visual studio 6.0 service pack 2003 ORIGINAL CODE no thread Rtss_GenSine::getNextData() { //[CALCULATION] //mv_transferSize is accessible and has ALWAYS value 1600 which is ok } NEW CODE Rtss_GenSine::Rtss_GenSine() { createThread(NULL, threadFunction, (LPVOID) this,0,0); } Rtss_GenSine::getNextData() { SetEvent(startCalculating); WaitForSingleObject(stoppedCalculaing, INFINITE); } DWORD Rtss_GenSine::threadFunction(LPVOID pParam) { Rtss_GenSine* gen = (Rtss_GenSine*) pParam; while(runThread) { WaitForSingleObject(startCalculating, INFINITE); ResetEvent(startCalculating) //[CALCULATION] //gen->mv_transferSize ---> it does not fail, but is always zero //all variables accessed via the gen-pointer are 0 setEvent(stoppedCalculaing) } }

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  • Searching for Nodes with Specific Text using the Prototype Javascript Framework

    - by Alan Storm
    Does the Prototype Javascript library have a selector that's equivalent to jQuery's :contains()? If not, what would what be "The Prototype Way" to selector/filter-down a list of elements that contains a particular string. For example, using the following $$('#some_div dd a') I may get back an array of 50 or so links. I only want the links that contain the work 'home'. In jQuery I'd do this jQuery('#some_div dd a:contains('home')'); Is it possible to do something similar using Prototype? If not, is there an elegant way to filter out the array of 50 elements that gets returned.

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  • Division to the nearest 1 decimal place without floating point math?

    - by John Sheares
    I am having some speed issues with my C# program and identified that this percentage calculation is causing a slow down. The calculation is simply n/d * 100. Both the numerator and denominator can be any integer number. The numerator can never be greater than the denominator and is never negative. Therefore, the result is always from 0-100. Right now, this is done by simply using floating point math and is somewhat slow, since it's being calculated tens of millions of times. I really don't need anything more accurate than to the nearest 0.1 percent. And, I just use this calculated value to see if it's bigger than a fixed constant value. I am thinking that everything should be kept as an integer, so the range with 0.1 accuracy would be 0-1000. Is there some way to calculate this percentage without floating point math?

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  • Preventing the opening of a form on an ad

    - by Jonathan
    Hey guys, Did you guys know how to prevent the open of a Form when I click on a add button? Maybe using beforeShowForm? function(formid) { if(jQuery('#gridap').getGridParam('selrow')) { idgridap=jQuery('#gridap').getGridParam('selrow'); jQuery('#FK_numerocontrato_ap',formid).val(idgridap).attr('readonly','readonly'); } else { // I want to prevent the openning of the add form here and maybe show an alert using the "alertcap" } } CHECAROW; $grid->setNavEvent('add','beforeShowForm',$checarowid); BTW, there's a way to call the alertmod of jqgrid and add a custom message to it? tks!

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  • Strategy in storing ad-hoc numbers/constants?

    - by Jiho Han
    I have a need to store a number of ad-hoc figures and constants for calculation. These numbers change periodically but they are different type of values. One might be a balance, a money amount, another might be an interest rate, and yet another might be a ratio of some kind. These numbers are then used in a calculation that involve other more structured figures. I'm not certain what the best way to store these in a relational DB is - that's the choice of storage for the app. One way, I've done before, is to create a very generic table that stores the values as text. I might store the data type along with it but the consumer knows what type it is so, in situations I didn't even need to store the data type. This kind of works fine but I am not very fond of the solution. Should I break down each of the numbers into specific categories and create tables that way? For example, create Rates table, and Balances table, etc.?

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  • Javascript to show in other page

    - by Irwan
    I have index.php to auto refresh div with jquery (sucess) function jin_ajax_loop() { // url and target jin_ajax_req('inbox.php','div_test'); } < body < div id="div_test" < /div < /body and then inbox.php to show notification: im using snotify from http://www.gayadesign.com/diy/snotify-easy-notifications-in-jquery/ '--------------------------------------------------------------------------------------- < script type='text/javascript' src='js/jquery.min.js'< /script" < script src="js/sNotify.js" type="text/javascript"< /script < script type="text/javascript" sNotify.addToQueue("Test"); < /script '--------------------------------------------------------------------------------------- And I want to show this notification sNotify.addToQueue("Test") in index.php Ho I do? Thanks

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  • design using a readonly class in c#

    - by edosoft
    Hi Small design question here. I'm trying to develop a calculation app in C#. I have a class, let's call it InputRecord, which holds 100s of fields (multi dimensional arrays) This InputRecordclass will be used in a number of CalculationEngines. Each CalculcationEngine can make changes to a number of fields in the InputRecord. These changes are steps needed for it's calculation. Now I don't want the local changes made to the InputRecord to be used in other CalculcationEngine's classes. The first solution that comes to mind is using a struct: these are value types. However I'd like to use inheritance: each CalculationEngine needs a few fields only relevant to that engine: it's has it's own InputRecord, based on BaseInputRecord. Can anyone point me to a design that will help me accomplish this?

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  • PHP Error, is it resolvable, or a language bug?

    - by rls
    Given the following code $c= new SoapClient('http://www.webservicex.net/CurrencyConvertor.asmx?WSDL'); $usa = "USD"; $eng = "GBP"; doing a __getTypes on the client gives me Array ( [0] => struct ConversionRate { Currency FromCurrency; Currency ToCurrency; } [1] => string Currency [2] => struct ConversionRateResponse { double ConversionRateResult; } ) if i then do $calculation = $c->ConversionRate($usa, $eng); and print calculation i get an error about Catchable fatal error: Object of class stdClass could not be converted to string Is there a specific way i should be printing this out, or i it a bug, from researching / googling many people seem to have a problem but i cant find a suitbale solution, other than downgrading php, which isnt a solution for me as i am doing this as homework and its running off of a college server

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  • Sum in array with match value

    - by user325504
    Dear all, I would like to do a simple sum per salesid in php - mysql after cross calculation between date (2 table) to get the real time commission, all the value already come out correctly but I got problem with final sum per sales id. salesid-commission aa0001 - 1000 bb0001 - 500 aa0001 - 200 bb0001 - 50 I already try with few sample in this web but still cannot meet the correct result. I cannot do the sum in mysql because of some reason (need calculation with other table) the result will be: aa0001 - 1200 bb0001 - 550 I aprreciated for any help to complated the test. Thank you so much.

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  • Operate on pairs of rows of a data frame

    - by lorin
    I've got a data frame in R, and I'd like to perform a calculation on all pairs of rows. Is there a simpler way to do this than using a nested for loop? To make this concrete, consider a data frame with ten rows, and I want to calculate the difference of scores between all (45) possible pairs. > data.frame(ID=1:10,Score=4*10:1) ID Score 1 1 40 2 2 36 3 3 32 4 4 28 5 5 24 6 6 20 7 7 16 8 8 12 9 9 8 10 10 4 I know I could do this calculation with a nested for loop, but is there a better (more R-ish) way to do it?

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  • Problem with variable inside gsp

    - by xain
    Hi, I have a loop inside a gsp page, and I want to do a calculation on the fly, so I set a variable: <g:set var="total" value="0" /> And in the loop: <g:each in="${mob}" var="m"> ... <g:set var="total" value="${total+(m.q*m.sts.uf)}"/> ... </g:each> The "total" value does not correspond to the expected calculation. m.q is an integer, and m.sts.uf is a float. Any hints ? Thanks.

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  • Better to combine & minify javascript or use Google CDN?

    - by jessegavin
    I am building a site which currently uses javascript from several sources: Group 1: Google Maps API v3 (hosted by Google) Group 2: jQuery & swfobject (hosted on Google CDN) Group 3: Several jQuery plugins and non-jquery javascript files (hosted on my server) I am using Justin Etheredge's tool SquishIt to combine and minify all the javascript files that are hosted on my server (group 3). I am wondering if the site would 'feel' faster to users if I were to host the files in (group 2) locally so that they can be combined with all the other files in (group 3) and requiring only one HTTP request for groups 2 & 3. This would mean that I don't get the benefits of the Google CDN however. Does anyone have any advice on this matter?

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  • iphone float vs integer rounding?

    - by Rob
    Okay, from what I understand, an integer that is a fraction will be rounded one way or the other so that if a formula comes up with say 5/6 - it will automatically round it to 1. I have a calculation: xyz = ((1300 - [abc intValue])/6) + 100; xyz is defined as an NSInteger, abc is an NSString that is chosen via a UIPicker. I want the calculation (1300 - [abc intValue]) to add 1 to 100 for each 6 units below 1300. For example, 1255 should result in xyz having a value of 100 and 1254 should result in a value of 101. Now, I understand that my formula above is wrong because of the rounding principles, but I am getting some CRAZY results from the program itself. When I punched in 1259 - I got 106. When I punched in 1255 - I got 107. Why would it behave that way?

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  • PHP: Star rating system concept?

    - by Prashant
    I am using PHP/MYSQL/JQUERY. I have a site which have news section. On news details page, I want to add star rating system which will allow user to rate the news story. I am using this jquery rating system http://www.fyneworks.com/jquery/star-rating/ Now, I am not getting what will be the database structure and then what I need to code in PHP. I need what logic will be applied for this, like if 1000 people voted for the article, some given rating as 2 or 3 or1 or 5. Then Where I should be storing (db structure) this all and what I'll calculate (in php code). If someone has any article which shows this concept please provide. Please help, to understand the logic and concept of this. Thanks!

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  • What are cross-platform free/Open source Framework to create Touch based web apps/site using HTML/CSS/JS available?

    - by Jitendra Vyas
    What are cross-platform and cross browser and license free/Open source framework to create Touch/Multitouch based Web apps/site using HTML/CSS/JS, for mobile devices, specially for latest versions of Android, Blackberry, Windows 7, iphone and ipad available? For desktop websites I'm a jQuery lover. I know Sencha but it's not free I think. I know jQtouch but it's only for iPhone and I also know jquery mobile but I'm not cofirm, is it as powerful as Sencha? It's not necessarily for me to go with jquery mobile, if there are another better framework available than this I want to make compatible with Android, Blackberry, Windows 7 also. not only for iphone and ipad.

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  • What are the likely main reasons my website is very slow on IE?

    - by Bhupi
    Hi, I need to know what can be the main reasons (apart from the basics like grouping CSS selectors, reducing image size, using image sprite etc.) which makes a website slow on Internet Explorer, because my website works fine on the others like FF, chrome etc. Is it the huge use of Javascript framework (ie. jQuery, extjs, prototype)? Is it because of the use of plugins based on JS framework? Should I use core javascript and remove the use of any js framework? Should I try to avoid using jQuery(document).ready()? in case of jQuery framework? Above some of the questions which I know and please answer the questions which I couldn't ask because of lesser knowledge about these. I need to make my website perform well on IE (6,7,8) also please suggest. Thanks

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  • Project hosting on Google Code. Files are cahced?

    - by Frexuz
    I do not really understand how Google Code handles file versioning. I am building a jQuery plugin that anyone can access. Like so: <script type="text/javascript" src="http://jquery-old-browser-warning.googlecode.com/files/jquery.browser-warning.js"></script> This script accesses other files on the same project (via ajax). The problem is, that when I upload a new file, it just seems like there aren't any changed to it. Google recommends that new files should have new names. But then I would have to change the filenames that the script loads. But then I would have to change the script file as well, and that would break everybodys implementation (with the script-tag above) Is there a way to force a file to change when uploading with the same filename? PS: If I go directly to the project page's file list. Then I do get the file with the updated content. But as I said, not when getting it through ajax.

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  • Why do date manipulation in Java with milliseconds?

    - by staticsan
    I was recently faced with the problem of calculating the number of days from two dates in Java (without using joda, I'm afraid). Searching on the 'net shows most answers to this question say to get the milliseconds of the two days and convert that to days, which I found appalling. However, a scant few show a different approach: use a temporary variable to count how many times it takes adding 1 day to the first date to get to the second. This leaves the conversions to the code that does it best: the library. Why do so many people advocate the first? In another project, I had previously encountered numerous subtle date calculation problems involving time-zones, daylight-saving and once even leap years using seconds to do date comparisions and calculations. All these went away when all the comparison and calculation code was rewitten to use the language libraries. (This was in PHP, though, where the libraries are structured quite differently to Java.) So I'm understandably reluctant to use this "common wisdom" in the world of Java about comparing dates.

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  • Polygonal Divs -- Making content overflow in a specific shape?

    - by Will
    Here is the site I'm currently working on: http://willcrichton.net/ If you click on the arrows on each side of the hexagon in the middle, you can see that it transitions left and right using jQuery + jQuery Cycle + jQuery Easing. However, you can also see that it is rather ugly -- because I'm using hexagons and not squares and because divs are square shaped, the content hexagon overlaps with with the background in an unpleasant way. So, my question is: how would I essentially hack a div into a hexagon? That hexagon should be the same size/shape of the content div, and when content is outside the area of the hexagon it should be invisible.

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  • website is very slow on IE

    - by Bhupi
    Hi, I need to know what can be the main reasons (apart from the basics like grouping CSS selectors, reducing image size, using image sprite etc.) which makes a website slow on Internet Explorer, because my website works fine on the others like FF, chrome etc. Is it the huge use of Javascript framework (ie. jQuery, extjs, prototype)? Is it because of the use of plugins based on JS framework? Should I use core javascript and remove the use of any js framework? Should I try to avoid using jQuery(document).ready()? in case of jQuery framework? Above some of the questions which I know and please answer the questions which I couldn't ask because of lesser knowledge about these. I need to make my website perform well on IE (6,7,8) also please suggest. Thanks

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  • Cakephp ajax Autocomplete not working

    - by Vijay Kumbhar
    Hello All, I am using ajax autocomplete in my application, but it is not giving the output. Ajax request to the desired function goes but it is not giving back any response, it is blank. I am also using jquery but it is used for other effects. i added jquery no conflict to avoid the prototype & jquery conflicts. I have tried other ajax helper methods like obeserverfield, it is working fine & returning the proper response, but when i use autocomplete it fails Can anybody help me ..........

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  • Using custom HTML attributes for JavaScript purposes?

    - by user1103990
    One of my colleagues doesn't like to use HTML classes and ids for javascript/jQuery purpose. Therefore I've seen that he had created custom html attribute such as <div id="myid" class="cssClasses ..." [some-purpose-id]="mycustomId">...</div> I asked him if it was really a good idea and he replied that he considers that classes and Ids should be reserved for styling. Personally, I would have used classes. Some classes would have been used for styling, and some other classes would have been used for programming (jQuery selectors). The idea is to keep things appart also. And of course jQuery could set styling classes but if possible not use them for selection. Of course I also use id when appropriate but since an id is unique on a page, I like to do generic stuff using classes. I would like to know you opinions on the better approach (if there is one). Thank you.

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  • CSS issue with margin: auto

    - by user1702273
    Hi am having an issue with the margin auto of my website where i have a wrapper div with the width set to 1000px and the margins top and bottom to 0 and left and right to auto. I have a navigation menu in the side bar, where i used java script to replace the same div with different tables. when i click a link in the menu the wrapper shifts right some px and the comes to original, I don't want that action i want the wrapper to be static and not to vary at any time. how can i achieve that. when i set the margin to just 0, so problem with positioning. But i want the wrapper to be centered. Here is my css code: body { background-color:#E2E3E4; color:#333; margin:0; padding:0; font-size: 12px; } #wrapper { width:1000px; margin:0 auto; margin-bottom:10px; } #header1 { width:1000px; height:44px; margin:0 auto; background-color:#ED6B06; } #header2 { width:1000px; height:40px; margin:0 auto; border-bottom:1px solid #EDE9DE; } #header3 { width:1000px; height:40px; margin:0 auto; border-bottom:1px solid #EDE9DE; } #header2 p { margin:0 auto; font-size:20pt; color: #364395; font-smooth: auto; margin-left:15px; margin-top:5px; } #welcome { width:600px; float:left; padding:10px; margin:0 auto; } #status{ margin:0 auto; width:50px; float:right; padding:10px; margin-top:3px; margin-right:15px; } #content { width:780px; float:right; } #sidebar { width:150px; margin-top:15px; margin-left:10px; float:left; border-right:1px solid #EDE9DE; margin-bottom:25px; } #footer { clear:both; margin:0 auto; width:1000px; height:44px; border-top:1px solid #EDE9DE; } HTML: <html> <head> <link rel="stylesheet" type="text/css" href="style/style.css" media="screen" /> <title>Pearson Schools Management Portal</title> </head> <body id="home"> <div id="wrapper"> <?php include('includes/header1.php'); ?> <?php include('includes/header2.php'); ?> <?php include('includes/header3.php'); ?> <div id="content"> <h2>Welcome to Portal!</h2> </div> <!-- end #content --> <?php include('includes/sidebar.php'); ?> <?php include('includes/footer.php'); ?> </div> <!-- End #wrapper --> <link rel="stylesheet" type="text/css" media="screen" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/base/jquery-ui.css"> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript" src="http://jzaefferer.github.com/jquery-validation/jquery.validate.js"></script> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js"></script> <?php include('scripts/index_data.js'); ?> </body>

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  • ASP.NET MVC 2 project default script files. What do you use?

    - by Andrew Florko
    Many js files are included into Scripts folder by default in ASP.NET MVC 2 Projects. I suppose developers use jquery library nearly every time they program a site, but what about other files? Please, can you tell scenarios and reasons when you: Use Microsoft.Ajax instead of jquery or mix both libraries? Do you use JQuery validation infrastructure instead of asp.net mvc one, or combine them both? Thank you in advance! P.S. there are also diferrent editions of the same file. Do you include different editions depenending on debug/release build?

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