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  • How do you return draggable content to their original positions in iPhone dev?

    - by Matt Thomas
    I am wanting to create a button in my iPhone app that when touched will return other draggable elements to their original position. I have looked at the Apple "MoveMe' example, but that returns the button to the center of the screen. I want to be able to position draggable objects around the screen, drag the objects within the app, and then return them to their original starting positions by pressing a designated button. Any help appreciated!

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  • When designing an event, is it a good idea to prevent listeners from being added twice?

    - by Matt
    I am creating an event-based API where a user can subscribe to an event by adding listener objects (as is common in Java or C#). When the event is raised, all subscribed listeners are invoked with the event information. I initially decided to prevent adding an event listener more than once. If a listener is added that already exists in the listener collection, it is not added again. However, after thinking about it some more, it doesn't seem that most event-based structures actually prevent this. Was my initial instinct wrong? I'm not sure which way to go here. I guess I thought that preventing addition of an existing listener would help to avoid a common programming error. Then again, it could also hide a bug that would lead to code being run multiple times when it shouldn't.

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  • best way to use CoreLocation across multiple views

    - by Matt
    I have two views in my app, one is a general view where CoreLocation works away calculating the users location while the user is doing other stuff in the view. The second view is accessed by the user when they touch a button allowing them to locate themselves more accurately using a mapview and MapKit, i would like the mapview in this view to show the location that CoreLocation has already identified in the first view AND to continue displaying this location based on updates from CoreLocation in the other view. Is the best way here to create a singleton that encapsulates the CoreLocation stuff and have this referenced in the view with the map, or to use notifications ? or to use some other better practice for my scenario ? Thanks

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  • Code corresponding to leaks with Visual Leak Detector

    - by matt
    I am trying to use Visual Leak Detector in Visual Studio 2008, here is an example of the output I get: Detected memory leaks! Dumping objects -> {204} normal block at 0x036C1568, 1920 bytes long. Data: < > 80 08 AB 03 00 01 AB 03 80 F9 AA 03 00 F2 AA 03 {203} normal block at 0x0372CC68, 40 bytes long. Data: <( > 28 00 00 00 80 02 00 00 E0 01 00 00 01 00 18 00 {202} normal block at 0x0372CC00, 44 bytes long. Data: << E > 3C 16 45 00 80 02 00 00 E0 01 00 00 01 00 00 00 The user's guide says to click on any line to jump to the corresponding file/line of code ; I tried clicking on every line but nothing happens! What am I missing?

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  • Internet Explorer treating AJAX GET request as POST request?

    - by Matt Huggins
    For some reason, only in IE (tried 7 & 8), jQuery is performing a POST request when it should be a GET. See below: function(...) { /* ... */ $.ajax({ type: 'GET', dataType: 'script', url: '/something/' + id, processData: false, data: 'old_id=' + oldId, success:function(data) { alert(data); } }); /* ... */ } All browsers properly GET, but IE is performing a POST. Why?

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  • Worried about spiders repeatedly hitting high-demand page

    - by Matt Thrower
    Due to some rather bizarre architectural considerations I've had to set up something that really ought to run as a console application as a web page. It does the job of writing a large variety of text files and xml feeds from our site data for various other services to pick up so obviously it takes a little while to run and is pretty processor intensive. However, before I deploy it I'm rather worried that it might get hit repeatedly by spiders and the like. It's fine for the data to be re-written but continual hits on this page are going to trigger performance issues for obvious reasons. Is this something I ought to worry about? Or in reality is spider traffic unlikely to be intensive enough to cause problems?

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  • Acessing a struct member, using a pointer to a vector of structs. Error:base operand of '->' has non-pointer type

    - by Matt Munson
    #include <iostream> #include <vector> using namespace std; struct s_Astruct { vector <int> z; }; int main () { vector <s_Astruct> v_a; for(int q=0;q<10;q++) { v_a.push_back(s_Astruct()); for(int w =0;w<5;w++) v_a[q].z.push_back(8); } vector <s_Astruct> * p_v_a = & v_a; cout << p_v_a[0]->z[4]; //error: base operand of '->' has non-pointer type //'__gnu_debug_def::vector<s_Astruct, std::allocator<s_Astruct> >' } There seems to be some issue with this sort of operation that I don't understand. In the code that I'm working on I actually have things like p_class-vector[]-vector[]-int; and I'm getting a similar error.

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  • Why can't I pass an object of type T to a method on an object of type <? extends T>?

    - by Matt
    In Java, assume I have the following class Container that contains a list of class Items: public class Container<T> { private List<Item<? extends T>> items; private T value; public Container(T value) { this.value = value; } public void addItem(Item item) { items.add(item); } public void doActions() { for (Item item : items) { item.doAction(value); } } } public abstract class Item<T> { public abstract void doAction(T item); } Eclipse gives the error: The method doAction(capture#1-of ? extends T) in the type Item is not applicable for the arguments (T) I've been reading generics examples and various postings around, but I still can't figure out why this isn't allowed. Eclipse also doesn't give any helpful tips in its proposed fix, either. The variable value is of type T, why wouldn't it be applicable for ? extends T?.

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  • Which display manager for a non interactive Python app and mplayer?

    - by Matt
    I am developing an application that will run on Linux to run fullscreen all the time (no menus or trays or anything will be visible). The application is going to be developed in Python, not that that matters as far as the display manager, but what I am having a hard time with is choosing a display manager. I need something with the smallest possible footprint, that will let me run a graphical Python app and have an mplayer window at the same time, at widescreen resolutions (widescreen, 16:10,16:9, etc). Other than that, it doesn't need a lot of features, but the end footprint size is the most important thing I'll be looking at. What display manager would you recommend?

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  • Windows Phone 7.1.1 Ping

    - by Matt
    I am writing an app to connect to a third party application using REST web services. I have a configuration page that asks for an IP, Port, User Name & Password, currently it just blindly assumes you enter the correct details and attempts a connection. I want to create a test routine that goes through and checks off the following steps when setting up the config information Is the IP/Hostname correct (using ping or something) Is the Port correct Is the Username & Password correct then displays the results on screen as it's going so that if it can't connect to the service it's easier to identify where the issue is. To achieve step 1 I would like to use Ping or some equivalent that does not rely on a particular port being open. So I can eliminate dodgy DNS or a typo in the IP/Hostname. I understand from previous questions asked that ping wasn't possible in 7.0 but with Mango the sockets classes have been added in, is it possible now, if so how? If it still isn't possible is there a different way I can achieve step 1?

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  • How suitable is a DVCS for the corporate environment?

    - by Matt Brailsford
    I've been using SVN for some time now, and am pretty happy with how it works (but I can't say I'm an expert, and I haven't really done much with branches and merging). However an opportunity has arisen to put in some new practises on a new team and so I thought I'd take a look at DVCSs to see if it's worth making the jump. The company I work for is a pretty standard company where we all work in the same location (or sometimes at home) and we want to keep a central store of all code. My question is: if all you are doing with a DVCS is creating a central hub that everyone pushes their changes to, is there really any benefit to moving to a DVCS and its extra overheads in this sort of environment?

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  • Performing an action on Parent/Child elements independently.

    - by Matt Weldon
    I have HTML similar to the following in my page <div id="someDiv"> <img src="foo.gif" class="someImg" /> </div> The wrapper div is set up such that when it is clicked, it's background-color changes using the following jQuery code. $("div").click(function(event){ $(this).css("background-color", "blue"); }); I also have some jQuery associated with my img that will do some other function (for the sake of argument I am going to display and alert box) like so: $("img[class=someImg]").click(function(event){ alert("Image clicked"); }); The issue I have come across is that when I click on the img, the event associated with the div is also triggered. I'm pretty sure that this is due to the way that jQuery (or indeed JavaScript) is handling the two DOM elements - clicking the img would require you to also technically click the div, thus triggering both events. Two questions then really: Is my understanding of the DOM/JavaScript flawed in some way or is this actually how things are occurring? Are there any jQuery methods that would allow me to perform actions on a child element without invoking those associated with its parent?

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  • Use of malloc() and free() in C++

    - by Matt H
    Is there any reason to use malloc and free in C++ over their more modern counterparts? Occasionally I see this, and I can't see why some people do it. Are there any advantages/disadvantage, or is there no real difference, except that it's just better to use C++ constructs in C++?

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  • How to print all rows in one page with Crystal Reports

    - by Matt
    I am using Crystal Reports 2011. I am totally new to crystal reports and reporting tools in general. I just added my data fields to the details section, but instead of showing all the rows in one page, a new page is created for each row. I did not use any grouping or change the section paging settings. This only happens for a blank report, when using the report wizard it works fine, but I can't see the difference between what I did and what the report wizard did.

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  • How to set up Node server for production on own machine?

    - by Matt Hintzke
    This must be a pretty basic thing to do, but I cannot find any good guide on how to do it on the internet. I only find how to set up a development environment for Node. I want to be able to forward my R-Pi's port 80 to my Node server, which I want to obviously listen on port 80. How can I close the native port 80 so that I can let me Node server listen on that port. Ultimately, I want to be able to access my pi from any remote location. I know how to set up a static IP and forward the port on my router, but now how do I allow Node into port 80?

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  • Date type in oracle does not include time values

    - by Matt
    I have a PHP application using an Oracle XE database. Whenever I add a date the hours minutes, and seconds seem to get left out. Is there some special format, or type I should use to be able to store this? I have tried using to_date, and specifying the format I am using. Many thanks for any suggestions from this confused MySql dveloper.

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  • Accessing preloaded images from parent script two use in child script. How?

    - by Matt
    I'm trying to update an image in a parent window with clickable links in a child window. I've preloaded the images in the parent window with one javascript file. "scriptss.js" My problem is I need to access the preloaded images of the parent window with the childscript "scriptremote.js" Thanks again for all the JS Help! The JS (scriptss.js) var newWindow = null; window.onload = init; var i = 0; image_object = new Image(); myImages = new Array(); // declare array myImages[0]="images/img1.jpg" // load array myImages[1]="images/img2.jpg" myImages[2]="images/img3.jpg" myImages[3]="images/img4.jpg" myImages[4]="images/img5.jpg" myImages[5]="images/img6.jpg" Here's the HTML for parent window: <img src="" width="200px" height="200px" id="myimage" name="myimage" /></img> Here's the JS for child window: window.onload = init; function init() { } function first_image() { window.parent.image_object.src = myImages[3]; //Problem happens here I think document.getElementById("myimage")window.parent.src = window.parent.image_object.src; } The HTML Child Window <h1>My Remote</h1> <a href="#" id="first" onclick="first_image()" >First Image</a> </br>

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  • Accessing preloaded images from parent script too use in child script. How?

    - by Matt
    I'm trying to update an image in a parent window with clickable links in a child window. I've preloaded the images in the parent window with one javascript file. "scriptss.js" My problem is I need to access the preloaded images of the parent window with the childscript "scriptremote.js" Thanks again for all the JS Help! The JS (scriptss.js) var newWindow = null; window.onload = init; var i = 0; image_object = new Image(); myImages = new Array(); // declare array myImages[0]="images/img1.jpg" // load array myImages[1]="images/img2.jpg" myImages[2]="images/img3.jpg" myImages[3]="images/img4.jpg" myImages[4]="images/img5.jpg" myImages[5]="images/img6.jpg" Here's the HTML for parent window: <img src="" width="200px" height="200px" id="myimage" name="myimage" /></img> Here's the JS for child window: window.onload = init; function init() { } function first_image() { window.parent.image_object.src = myImages[3]; //Problem happens here I think document.getElementById("myimage")window.parent.src = window.parent.image_object.src; } The HTML Child Window <h1>My Remote</h1> <a href="#" id="first" onclick="first_image()" >First Image</a> </br>

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  • Can't modify XNA Vector components

    - by Matt H
    I have a class called Sprite, and ballSprite is an instance of that class. Sprite has a Vector2 property called Position. I'm trying to increment the Vector's X component like so: ballSprite.Position.X++; but it causes this error: Cannot modify the return value of 'WindowsGame1.Sprite.Position' because it is not a variable Is it not possible to set components like this? The tooltip for the X and Y fields says "Get or set ..." so I can't see why this isn't working.

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  • how to get something to display only once in a while loop

    - by Matt Nathanson
    I've got a mysql query running and it checks to see if an iterator is equal to 1, then display this div title... if ($this->dliterator == 1) {echo "<div class='clientsection' id='downloads'>Downloads</div><br/>";}; The problem is, is that the dl iterator may not necessarily start at 1. (it is directly related to a downloadid from the database). How can I get this to display only for the first time through the loop ONLY? while ($row = mysql_fetch_assoc($result)) { if ($row['download'] != null){ if ($this->dliterator == 1) {echo "<div class='clientsection' id='downloads'>Downloads</div><br/>";}; if ($editDownload == 1) { echo "<div class='clientlink' style='margin-top: 15px;'>"; echo "<input name='downloads[$this->dliterator][name]' type='text' id='download$this->dliterator' value='" . $row['download'] . "'/>"; echo "<input name='downloads[$this->dliterator][title]' type='text' id='downloadtitle$this->dliterator' value='" . $row['downloadtitle'] . "'/>"; echo "<img class='removelink' src='/images/deletelink.png' width='15' />"; echo "<input id='downloadid' name='downloads[$this->dliterator][id]' type='hidden' value='".$row['downloadid']."' style='display: none'/>"; echo "<br/><img id='uploaddownload$uploaditerator' class='uploaddownload' src='../images/upload.png' width='80'/>"; echo "</div>"; }; }; $this->dliterator++; $uploaditerator++; };

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  • Java Equivalent of C++ .dll?

    - by Matt D
    So, I've been programming for a while now, but since I haven't worked on many larger, modular projects, I haven't come across this issue before. I know what a .dll is in C++, and how they are used. But every time I've seen similar things in Java, they've always been packaged with source code. For instance, what would I do if I wanted to give a Java library to someone else, but not expose the source code? Instead of the source, I would just give a library as well as a Javadoc, or something along those lines, with the public methods/functions, to another programmer who could then implement them in their own Java code. For instance, if I wanted to create a SAX parser that could be "borrowed" by another programmer, but (for some reason--can't think of one in this specific example lol) I don't want to expose my source. Maybe there's a login involved that I don't want exploited--I don't know. But what would be the Java way of doing this? With C++, .dll files make it much easier, but I have never run into a Java equivalent so far. (I'm pretty new to Java, and a pretty new "real-world" programmer, in general as well)

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  • How can I handle validation of non-latin script input in PHP?

    - by Matt
    I am trying to adapt a php application to handle non-latin scripts (specifically: Japanese, simplified Chinese and Arabic). The app's data validation routines make frequent use of regular expressions to check input, but I am not sure how to adapt the \w character type to other languages without installing additional locales on the system (which I cannot rely on). Previous developers to have worked on the app have simply added needed characters to the regexes as the number of languages we supported grew (you frequently see "[\wÀÁÂÃÄÅÆÇÈÉ... etc" in the code), but I can't really do this for all the alphabets I need to support now. Does anybody out there have some advice on how to tackle this?

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  • Can you make an Extension Method Static/Shared?

    - by Matt Thrower
    OK, I've probably misunderstood something here but, as far as I can see ... An extension method has to be contained in a module, not a class You can't make methods in modules Static/Shared Therefore you can't use an extension method on a class without instantiating it. In other words you can't make an extension method on String called "MyExtensionMethod" and use: String.MyExtensionMethod("String") But instead .. Dim test As String test.MyExtensionMethod("string") Is this correct? Or is there a way I can get extension methods to work as static methods?

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