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• How to detect an active x component that does not respond any more?

  - by koschi

  My application is written in C++ and uses the Qt framework. I use the QAxWidget class to access an active x component. Now I need some kind of mechanism that notifies my application each time the active x component has crashed or does not respond any more (due to dead lock or infinite loop). (1) can easily been done by watching the external process of the active x component. But maybe there is a more elegant approach? But how can (2) be implemented?

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• GDI+ DrawImage function

  - by ET

  There is something I am missing. Say I have the following code: private Bitmap source = new Bitmap (some_stream); Bitmap bmp = new Bitmap(100,100); Rectangle newRect = new Rectangle(0, 0, bmp.Width, bmp.Height); Rectangle toZoom= new Rectangle(0, 0, 10, 10); Graphics g = Graphics.FromImage(bmp); g.DrawImage(source, newRect, toZoom, GraphicsUnit.Pixel); My goal is to zoom-in the 10x10 pixels on the top left corner of the source picture. After I created the graphics object g and called DrawImage: the requested rectangle (toZoom) will be copied to bmp, or will it be displayed on the screen? I am a bit confused, can somebody please clarify?

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• Python Terminated Thread Cannot Restart

  - by Mel Kaye

  Hello, I have a thread that gets executed when some action occurs. Given the logic of the program, the thread cannot possibly be started while another instance of it is still running. Yet when I call it a second time, I get a "RuntimeError: thread already started" error. I added a check to see if it is actually alive using the Thread.is_alive() function, and it is actually dead. What am I doing wrong? I can provide more details as are needed.

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• How to check if canvas objects overlap each other

  - by ?????? ???????

  I'm trying to check if two objects (e.g. a rectangle and a triangle) on a HTML5 canvas are overlapping each other. Currently I can only check that by looking at the screen (having set globalCompositeOperation='lighter'). My first idea would have been to scan all over the canvas if the "lighter" (compare code snippet above) color exists in the canvas. But therefor I would have to look at every single pixel which was rather costly for what I need. Is there a (better) alternative to automatically check if they are overlapping? Best regards.

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• shell_exec syntax error. running in terminal directly is ok

  - by Alex

  Having this command: $command = "diff -bBdH --ignore-all-space <(echo 'hi') <(echo 'hi1')"; echo $command; $result = shell_exec($command); On the screen I see: sh: 1: Syntax error: "(" unexpected diff -bBdH --ignore-all-space <(echo 'hi') <(echo 'hi1') If I copy-paste the second line from the console output into the terminal, the result would be correct. (Reproduced on another machine too). I'm missing something dead simple here and can't see what it is. besides, why is my output reversed? I'm clearly echoing the command before executing it, thus the syntax error of the shell should appear after the shell_exec

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• Implementing a 24 queue using MSMQ and WCF

  - by miker169

  I am shortly starting a project, which requires messages to be held in a queue for a period of 24 hours, this is because the database can't have any updates at certain times of the month. The service also has to be hosted on windows server 2003, which means it will have to be a windows service. It is also required that the service use WCF so that in 12 months time when we move over to windows server 2008, the service can hosted in iis 7. At present I am wondering if MSMQ is the best way to handle this. I've been looking into topics like poison message handling & dead letter queues, but nothing that really covers what I am intending to actually do. Could anyone recommend a sample or a tutorial for this ? Thanks in advance

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• How do you get the ID of a control in ASP.NET

  - by James

  I am attempting to loop through an array of numbers, match them to the checkbox they they are associated with, and checkmark that box. My checkbox is set up like: <input type="checkbox" runat="server" id="someID" name="somename" value="1234" /> My code when the page loads currently looks like: foreach (string interest in interests_Var){ foreach (var c in Page.Controls) { } } interests_Var is my array containing different numbers. We'll assume one of them is 1234. While looping through the page controls, I want to compare the value of the control to my number. If it equals my number, I want to then apply the attribute checked="checked". I'm assuming I have to find the ID of the control I am using, then use that ID to add a new attribute. Or is there a way I can add the attribute using the c variable? I'm not dead set on this setup, so if you know a better way, I'm all ears. Thanks for any help and suggestions.

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• Couldn't assign 'top' from variable in jQuery Animate

  - by bhu1st

  Hi, I am stuck here, i am trying to animate number of 'x' divs (the code below is just for one div) by selecting their original 'top' position & adding some 'newTop' pixel values to them. var dur = 1500; var origTop = $("#div_x").position().top; var newTop = parseInt(origTop) + 30; $("#div_x").animate({ top : newTop + "px" }, dur); I checked alerting the 'newTop' variable and it's showing correct values but the animation is not working. I tried different variants to assign 'top' to the animate function but nothing is working. any suggestion would help me a lot. thanks in advance.

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• HTML img scaling

  - by rwallace

  I'm trying to display some large images with HTML img tags. At the moment they go off the edge of the screen; how can I scale them to stay within the browser window? Or in the likely event that this is not possible, is it possible to at least say "display this image at 50% of its normal width and height"? The width and height attributes distort the image -- as far as I can tell, this is because they refer to whatever attributes the container may end up with, which will be unrelated to the image. I can't specify pixels because I have to deal with a large collection of images each with a different pixel size. Max-width doesn't work.

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• Current state of Erlang web development? Frameworks, Template languages

  - by pommonico

  Django is to Python as Rails is to Ruby. What is the current front-runner for Erlang? Recent Erlang web activity has resulted in many new frameworks but they are all still moving targets. ErlyWeb is very far along but now seems to be dead. If you were to invest significant capital into a new web product (i.e. not a hobby, you use your own money and you use other's investment in you with expectation of payback), would you choose Erlang as a web platform? If so, what framework and technologies would you choose?

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• What causes extra space and random alignment in my divs using the 960 grid system?

  - by tomdot

  I have an issue where elements in divs seemingly align randomly, not responding to any align tag, and where divs create extra space above or below its element. I'm using the 960 grid system and I have not altered the stock CSS file lest my fingers blow it up. I've put up a test page here, and please excuse some of the dodgy code :-D It's still in it's very early stages (as am I), but I don't feel I can move on until I can comfortably understand what is causing the issue. The best example on that page is the bottom horizontal bar and elements underneath. The bar adds a few pixels of dead space, and the elements below that align to different parts of their respective divs. Why is it that elements seemingly do not standardise their alignment given no instruction, and what causes extra space again where no instruction was given? My own thought was to relatively position everything individually, but I'm worried this will cause issues and 'break' the grid. Other than that, I unno. Thanks

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• Business web application platform structure

  - by VoodooRider

  Hi, I would like to develop a web application in java/spring/hibernate serving as a business platform that I could connect plugins to (i.e. CRM plugin, ware plugin, sales plugin). Those plugins could be dependent of other plugins in a tree manner. The parent project would be packaged as war having all the basic configuration and looks (spring configs, css, scripts), ready to go user and group management, security settings, etc. All together I would like it to behave and look a bit like Joomla, but built using different tools for different purposes. And I have a few questions concerning that project: Do you know of any open source projects offering such a platform ready to go? If not is maven applicable for managing those plugins? What is the best way to package and deploy those plugins? And the last but not least, basically is this the right way to go or is a dead end and it would be better to create a separate web app for those business needs?

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• Interpolation on Cubism graphs

  - by Abe Stanway

  Cubism was designed, by mbostock's own words, for maximum information density - which means it generally wants to display one datapoint per pixel. While this is useful in many cases, it doesn't help when your data itself is not that dense. In these cases, you get ugly, staccato-style graphs like so: Is there a way to interpolate my data/graph within Cubism to show a nice, smoothed graph? EDIT: After adding keepLastValue to the metric, I get this: Here is the same data as shown in Graphite: I would like to smooth the Cubism view to look more like Graphite (with the added awesomeness of the horizon overplotting)

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• JavaScript eval() with `this`

  - by mojuba

  If I define a JavaScript code snippet in my HTML, like so: <div id=myElem onMyUpdate="alert('Update called for ' + this.id)">... then what is the most elegant way of evaluating it from within JavaScript with this properly assigned? What I came up with so far is something like this: if (elem.hasAttribute('onMyUpdate')) (function () { eval(elem.getAttribute('onMyUpdate')) }).call(elem); which looks terrible (to me), but works. Any better/more elegant alternatives? MDN says there used to be the second argument to eval() for doing just that but it's deprecated now; MDN then suggests to use operator with() instead, which, if you follow the link provided, turns out to be made deprecated by the latest standard. Dead end, in other words. (As a side note, StackOverflow ignores the word this in search terms and thus it may miss relevant answers - is there a way of telling it not to?) Edit: I forgot to mention: no jQuery please, just vanilla JavaScript

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• Is it not possible to print a pdf from a hyperlink?

  - by andrew

  I have looked for weeks and I keep hitting dead ends. I know you can create a text or image link and tell it to "print page" in a browser. But so far, I can't get it to print a document, specifically a pdf. I would like the print dialog to show after the link is clicked and yes, the pdf linked to has been printed. Why does this seem to be such an impossible feat? I have seen it work in a Flash movie, but since I cannot access the native file I cannot see how it was done. Any advice? Thanks.

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• Disposing a Bitmap through its Finalizer

  - by devoured elysium

  I have a complex program in which I have to first create, then use wrappers around bitmaps and send them across a lot of different classes. The problem in the end is deciding which classes should dispose the bitmaps. Most of the time the end classes don't know if they can indeed dispose the bitmap as the same bitmap can be used in several places. Also, I can't just copy the bitmaps because this is a kind of resource intensive algorithm and doing it would be dead slow. I looked up on reflector for Image/Bitmap's implementations and they seem to use the Dispose Pattern. So, even if I don't call Dispose(), the CLR will eventually call it some other time. Is it too bad if I just let the bitmaps be as they are, and let the finalizer take care of them?

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• C/C++: Scanning a TIFF file using LIBTIFF

  - by Matt07

  My problem is to scan a tiff image in C and get all the pixel value (let's say for saving them in a txt file) in C/C++. I scanned the web and i found a library named "TIFFLIB" that should do what i was looking for. I downloaded it using the ubuntu package manager, but the gcc doesn't recognize the library. How do i link the library to the compiler? Have I installed it correctly? Is there any better/easier way to do that?

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• Parallelism on two duo-core processor system

  - by Qin

  I wrote a Java program that draw the Mandelbrot image. To make it interesting, I divided the for loop that calculates the color of each pixel into 2 halves; each half will be executed as a thread thus parallelizing the task. On a two core one cpu system, the performance of using two thread approach vs just one main thread is nearly two fold. My question is on a two dual-core processor system, will the parallelized task be split among different processor instead of just utilize the two core on one processor? I suppose the former scenario will be slower than the latter one simply because the latency of communicating between 2 CPU over the motherboard wires. Any ideas? Thanks

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• Passing report values to a query

  - by Beavis

  I'm a novice with Microsoft Access as my background is mostly .NET. I'm sure what I'm trying to accomplish is dead simple but I need some direction. I have a report and a query. The query returns a single numeric value based on a single numeric criteria. Select total from table where id = [topic] I have placed a text box on my report so I can feed the id to this query and in return get the total. It seems like DLookUp is what I want but no matter how I construct it, I get an "#Error" in the text box when I run the report. Currently my DLookUp looks like this (I just hard-coded now for simplicity): =DLookUp("[total]","myquery","[topic] = 3") How can I pass a value from a field on my report to a query so I can return the query's single numeric value? Thanks.

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• Field annotated multiple times by the same attribute

  - by Jaroslaw Waliszko

  For my ASP.NET MVC application I've created custom validation attribute, and indicated that more than one instance of it can be specified for a single field or property: [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)] public sealed class SomeAttribute: ValidationAttribute I've created validator for such an attribute: public class SomeValidator : DataAnnotationsModelValidator<SomeAttribute> and wire up this in the Application_Start of Global.asax DataAnnotationsModelValidatorProvider.RegisterAdapter( typeof (SomeAttribute), typeof (SomeValidator)); Finally, if I use my attribute in the desired way: [SomeAttribute(...)] //first [SomeAttribute(...)] //second public string SomeField { get; set; } when validation is executed by the framework, only first attribute instance is invoked. Second one seems to be dead. I've noticed that during each request only single validator instance is created (for the first annotation). How to solve this problem and fire all attributes?

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• Detecting touch area on Android

  - by HappyAppDeveloper

  Is it possible to detect every pixel being touched? More specifically, when the user touches the screen, is it possible to track all the x-y coordinates of the cluster of points touched by the user? How can I tell the difference between when users are drawing with their thumb and when they are drawing with the tip of a finger? I would like to reflect the brush difference depending on how users touch the screen, and would also like to track x-y coordinates of all the pixels being touched over time. Thanks so much in advance for any help.

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• Resizing to page width for print style sheet

  - by rampion

  So I've got a page that shows an image with some absolutely positioned text on top of it. I want to write a print style sheet for it so that: the image is resized to fit the width of the page the text is repositioned and resized to maintain relative position and size with the image behind it So I know I can do (1) with just max-width: 100%, but I'm not sure how to accomplish (2). I'm okay with using some javascript if necessary, but I wanted to know if there's a way to do this in pure CSS. If I do need to use javascript, what can I hook to check for the pixel width of the image in the printed page? Just use the calculated width as normal? And yes, this question might be more appropriate for DocType, but I've yet to get any help over there.

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• How to change the text of a div tag

  - by michael

  Hi, I have a simple div tag. Can you please tell me how can I change the text to 'mouse in' in my onmouseover handler? and 'mouse out' in my onmouseout handler? <div id="div1" onmouseover="alert(1);" width="100px" height="200px" border="1"> test </div> and why the width/height and border attributes do not work? I want to set the border to be 1 pixel with width = 100 pixels and height = 200 pixels. Thank you.

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• aspectRatio = backingWidth / backingHeight ???

  - by carrots

  What am I doing wrong here, I can't get the result of this division: aspectRatio = backingWidth / backingHeight; I've thought I might try casting to (GLfloat) but that didn't do anything. As I step through the code I see that aspectRatio is 0 after the operation, while backingWidth is clearly 768 and backingHeight is 1029. Here are the types: GLfloat aspectRatio; and // The pixel dimensions of the CAEAGLLayer GLint backingWidth; GLint backingHeight; It must be something basic I'm doing wrong here..

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• A good ecommerce alternative to Magento?

  - by delboud

  I been dealing with Magneto for the last 6 months now and its a real headache, always some type of error, slow, bloated, dead community and overly complex to customize (and im a designer...) I look at others like zencart but seem kinda dated compared to magento, but are their any other solutions to replace magento thats better and with a good online community? the main selling points im looking for are configurable items (as in options for products), good online community and not so hard to customize or a nice amount of templates available. has to be free and hopefully open source and if it helps this is for a custom car accessories store

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