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• How to draw to screen in c++ ?

  - by Kesarion

  How would I draw something on the screen ? not the console window but the entire screen, preferably with the console minimised. Also, would it show up on a printscreen ? What I want to do is create something like a layer on top of the screen that only me and my aplication are aware of yet still be able to use aplications as usual. Here's an example: Let's say I want 2 yellow squares 5 by 5 pixels in size appearing in the center of the screen on top of all the other applications, unclickable and invisible to a printscreen.

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• Class.Class vs Namespace.Class for top level general use class libraries?

  - by Joan Venge

  Which one is more acceptable (best-practice)?: namespace NP public static class IO public static class Xml ... // extension methods using NP; IO.GetAvailableResources (); vs public static class NP public static class IO public static class Xml ... // extension methods NP.IO.GetAvailableResources (); Also for #2, the code size is managed by having partial classes so each nested class can be in a separate file, same for extension methods (except that there is no nested class for them) I prefer #2, for a couple of reasons like being able to use type names that are already commonly used, like IO, that I don't want to replace or collide. Which one do you prefer? Any pros and cons for each? What's the best practice for this case? EDIT: Also would there be a performance difference between the two?

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• Getting ftp_put progress

  - by Billiam

  I have a php script on a web server that uploads a file to another remote server via ftp_put. How can I display the current upload progress to the user? The only similar system I've seen is for file uploads from the user, with ajax requests to check the local size of the uploaded file on the server. The equivalent system would be ajax requests to the web server, that then checked file sizes on the remote server and returned that data to the user's clientscript. This seems horribly inefficient to me. Is there a better way?

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• How do I sub sample data by group using ddply?

  - by Maiasaura

  I've got a data frame with far too many rows to be able to do a spatial correlogram. Instead, I want to grab 40 rows for each species and run my correlogram on that subset. I wrote a function to subset a data frame as follows: samp <- function(dataf) { dataf[sample(1:dim(dataf)[1], size=40, replace=FALSE),] } Now I want to apply this function to each species in a larger data frame. When I try something like culled_data = ddply (larger_data, .(species), subset, samp) I get this error: Error in subset.data.frame(piece, ...) : 'subset' must evaluate to logical Anyone got ideas on how to do this?

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• jQuery FadeTo() bg on rollover, IMG animate().width height

  - by jg462095

  Hello all, I have been reading StackOverflow for a while and now I have a question I cannot find an answer to. i am trying to fade a background and increase on img size on rollover. I have tried animate() and fadeTo(), however, the entire div fades. Do I need to absolute position my images over the div and not within it? img or img? Is that the only way to get items within a div to not fade along with the background? Thanks! Jason

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• Need to override cascade style

  - by WillingLearner

  i have a style : .window .div { border:medium solid #000000; height:150px; background-color: #0099FF; } and then i have another style: #NewDiv { font:Arial, Helvetica, sans-serif; font-size: 24px; height: 20px; border-bottom-width: medium; border-bottom-style: solid; border-bottom-color: #000000; } I need to put a #NewDiv div tag inside of window .div, BUT... #NewDiv must retain its own styling while sitting inside of window .div div tags. How do I do this? Currently when I try, #NewDiv takes on the same styling as window .div when i place it inside of it and i dont want that at all. Any suggestions?

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• Is Android (read typical devices) fast enough for a game that requires plotting pixel by pixel rather than blitting

  - by mP

  i have an idea for an Android game which is a little different from the typical game that usually moves sprites(bitmaps) around the screen. Id want to plot lots of little pixels to create my visuals. PROS no bitmaps required pixel plotting of stuff like "fire" can react to wind. no need to scale bitmaps, works w/ any screen res (lets pretend device can handle more drawing because its got a bigger screen). CONS slower to plot pixels than blit bitmaps need lot of animation frames. WISHES id like to update my game in real time, more is better 30fps is good but not essential, 15fps is enough. PERFORMANCE Q... Is the typical Android device fast enough to plot say half a screenful of pixels w/ a default background ? if full screen is not practical what window size should be able to handle such refreshes

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• unable to initialize a 512x512 array

  - by user1432196

  hey all i would just like to as why i keep getting a stack overflow error whenever i try to initialize a 512x512 array? Can anyone help? below is part of my code CImg<float> image("lena8bit.jpg"); CImgDisplay main_disp(image,"Main image"); int ImgArray [512][512]; Basically all i want to do is get the pixel values from the image and store it into this array. The image is 512x512 hence the array size. Hope to hear you answers, thanks!

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• Bean validation VS JSF validation

  - by henloke

  When facing the problem of validating a property in a JSF2 application there are two main approaches. Defining the validation on the ManagedBean using an Annotation @ManagedBean public class MyBean { @Size(max=8) private String s; // Getters setters and other stuff. } or declaring it on the jsf page: <h:inputText value="#{myBean.s}"> <f:validateLength maximum="8"/> </h:inputText> It happens that I can't decide for none of them. The first one is nice because it removes some code from the jsf pages (which is always good since those pages are not eye friendly by definition) but makes harder to see 'at a glance' what's going on with the page when checking the jsf file. Which one do you think is clearer? Nicer? Better?

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• How do I change the Unit:Characters in Matlab?

  - by Jonas

  For portability, I set the units of my GUIs to 'characters'. Now I have a user who wants to use Matlab on his netbook, and the GUI window is larger than the screen (and thus cropped at the top). I think I could try and write something in the openingFcn of the GUI that measures screen size and then adjusts the GUI accordingly, but I'd rather avoid that, because I then need to deal with text that is bigger than the text boxes, etc. What I'd rather like to do is somehow adjust the unit 'character' on his Matlab installation. None of the font sizes in the preferences seem to have an effect on unit:character, though. Does anyone know whether there's a setting for that, which can be changed from within Matlab (I don't mind if it's something that is reset at every reboot, since I can just put it into the startup script)?

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• FTP - way to programatically determine time remaining or bytes transfered?

  - by ciaranarcher

  Hi all I want to make an FTP connection (ideally using Coldfusion 8, but Java is fine too) that will copy a file to a remote server. Crucially however, I want to know how many bytes have been transferred so I can give some feedback to the user. Is this possible, and if so what FTP API would you recommend as I understand the Sun implementation may be a bit lacking. Thanks in advance! PS: I could have another process/thread poll the file size on the destination machine via a web service call while the file is being transferred but it's not ideal. Getting it through FTP API would be the neatest solution.

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• Looking for a managed image parser library (JPEG, BMP, PNG, GIF)

  - by usr

  I am writing a discussion board software that will have "avatar" images for the users. I want to resize any picture that gets uploaded to a reasonable size. I could easily do that with System.Drawing but that is relying on GDI+ which has hat security problems before. The problem is that the images are untrusted. So I thought of using a fully managed lib to solve that problem because managed code cannot escape the sandbox (of course it can, but only if the code is user-supplied which it is not in my case). So does anybody know of a managed image parser library for JPEG, BMP, PNG and GIF? If some format is missing than I will have to live with that. Edit: Paint.NET also relies on GDI+. You might be interested in the discussion below, too.

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• css issue when resize windows

  - by zlippr

  hi i am having issue with css as when i resize the windows the div is not placed properly as below this is css involving the div .similar_story_block_form { background-color: white; border: 1px solid #CCCCCC; border-radius: 0 0 12px 12px; box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.8); font-size: 13px; left: 337px; position: absolute; top: 105px; width: 337px; z-index: 100; } currently i use chrome which give me the same issue. What am i missing here? Thank for your help

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• CSS Position Help (horizontal sidebar showing up when animate content over)

  - by jstacks

  Let me try my best to explain what I'd like to have happen, show you the code I have an hopefully I can get some help. So, I'm trying to do a sliding navigation UI from the left side of the screen (like a lot of mobile apps). The main content slides over, displaying the navigation menu beneath. Right now the browser thinks the screen is getting wider and introduces a horizontal scroll bar. However, I don't want that to happen... How do I get the div to animate off screen but not enlarge the width of the screen (i.e. keep it partially off screen)? Anyway here is my fiddle: http://jsfiddle.net/2vP67/6/ And here is the code within the post: HTML <div id='wrapper'> <div id='navWide'> </div> <div id='containerWide'> </div> <div id='containerTall'> <div id='container'> <div id='nav'> <div id='navNavigate'> Open Menu </div> <div id='navNavigateHide'> Close Menu </div> </div> </div> </div> <div id='sideContainerTall'> <div id='sideContainer'> <div id='sideNav'>Side Navigation </div> </div> </div> </div> CSS #wrapper { width:100%; min-width:1000px; height:100%; min-height:100%; position:relative; top:0; left:0; z-index:0; } #navWide { color: #ffffff; background:#222222; width:100%; min-width:1000px; height:45px; position:fixed; top:0; left:0; z-index:100; } #containerWide { width:100%; min-width:1000px; min-height:100%; position:absolute; top:45px; z-index:100; } #containerTall { color: #000000; background:#dadada; width:960px; min-height:100%; margin-left:-480px; position:absolute; top:0; left:50%; z-index:1000; } /***** main container *****/ #container { width:960px; min-height:585px; } #nav { color: #ffffff; background:#222222; width:960px; height:45px; position:fixed; top:0; z-index:10000; } #navNavigate { background:yellow; font-size:10px; color:#888888; width:32px; height:32px; padding:7px 6px 6px 6px; float:left; cursor:pointer; } #navNavigateHide { background:yellow; font-size:10px; color:#888888; width:32px; height:32px; padding:7px 6px 6px 6px; float:left; cursor:pointer; display:none; } #sideContainerTall { background:#888888; width:264px; min-height:100%; margin-left:-480px; position:absolute; top:0; left:50%; z-index:500; } #sideContainer { width:264px; min-height:585px; display:none; } #sideContainerTall { background:#888888; width:264px; min-height:100%; margin-left:-480px; position:absolute; top:0; left:50%; z-index:500; } #sideContainer { width:264px; min-height:585px; display:none; } #sideNav { width:264px; height:648px; float:left; } Javascript $(document).ready(function() { $('div#navNavigate').click(function() { $('div#navNavigate').hide(); $('div#navNavigateHide').show(); $('div#sideContainer').show(); $('div#containerTall').animate({ 'left': '+=264px' }); }); $('div#navNavigateHide').click(function() { $('div#navNavigate').show(); $('div#navNavigateHide').hide(); $('div#containerTall').animate({ 'left': '-=264px' }, function() { $('div#sideContainer').hide(); }); }); });

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• Resizing Ubuntu x64 Server Partition with VirtualBox not reflected in OS

  - by daleyjem

  I've already resized my virtual disk with VirtualBox, but now need to extend the partition of my Ubuntu VM itself. I thought I was on my way with GParted live CD, but after I resize the "extended" filesystem partition, and then the child "lvm2 pv" filesystem partition to fill the unallocated space, df -h still shows the original disk size after I reboot into the VM. Any tips on this? I've scoured the webs tirelessly. Should I be resizing the boot (/dev/sda1) partition instead? Should I try to convert my lvm2 to ext4 or something? I'm lost on this. Note: VirtualBox hard disk is "dynamic". Specs: VBox 4.2.18 Ubuntu 12.04.2 amd64 Gparted 0.16.2-1b-i486

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• How can I get a Dialog style activity window to fill the screen?

  - by Matthias

  I am using an activity with the dialog theme set, and I want it to be full screen. I tried all sorts of things, even going through the WindowManager to expand the window to full width and height manually, but nothing works. Apparently, a dialog window (or an activity with the dialog theme) will only expand according to its contents, but even that doesn't always work. For instance, I show a progress bar circle which has width and height set to FILL_PARENT (so does its layout container), but still, the dialog wraps around the much smaller progress bar instead of filling the screen. There must be a way of displaying something small inside a dialog window but have it expand to full screen size without its content resizing as well?

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• Compressing digitalized document images

  - by Adabada

  Hello, We are now required by law to digitalize all the financial documents in our company and submit them to evaluations every 3 months. Since this is sensitive data we decided to take matters into our own hands and build some sort of digital data archiver. The tool works perfectly, but after 7 months of usage we are begining to worry about the disk space used by these images. Here some info on the amount of documents digitalized: 15K documents scanned and archived per day, with final PNG size of +- 860KB: 15 000 * 860 kilobits = 1.53779984 gigabytes 30 days of work per month: 1.53779984 gigabytes * 30 = 46.1339952 gigabytes Expectation of disk space usage after 1 year: 46.1339952 gigabytes * 12 = 553.607942 gigabytes So far we're at 424 gigabytes of disk space used, without counting backup. We're using PNG as image format, but I would like to know if anyone have any advice on a better compression algorithm for images or alternative strategies for compressing the PNG's even more or even better ways to archive images as to save disk space. Any help would be appreciated, thanks.

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• iphone - Search bar disappears from my root view controller

  - by Sudharsanan

  Hi, I have a search bar in my main screen - root table view controller. If I browse other screens and come back, sometimes, the search bar disappears. Here's my code. searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 0)]; searchBar.delegate = self; searchBar.tintColor = [UIColor blackColor]; [searchBar sizeToFit]; self.tableView.tableHeaderView = searchBar; searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; searchDisplayController.delegate = self; searchDisplayController.searchResultsDataSource = self; searchDisplayController.searchResultsDelegate = self; Is there anything wrong with my code or is it one of the quirks of SDK 3.0?

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• [perl] Efficient processing of large text

  - by jesper

  I have text file that contains over one million urls. I have to process this file in order to assign urls to groups, based on host address: { 'http://www.ex1.com' = ['http://www.ex1.com/...', 'http://www.ex1.com/...', ...], 'http://www.ex2.com' = ['http://www.ex2.com/...', 'http://www.ex2.com/...', ...] } My current basic solution takes about 600mb of RAM to do this (size of file is about 300mb). Could You provide some more efficient ways? My current solution simply reads line by line, extracts host address by regex and put url into hash.

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• adding a UIScrollView as a superview of 2 UITextview made no view can be scrolled

  - by Risma

  hi i have 2 textview in a viewcontroller. the 1st textview is not editable, but the 2nd is editable. i want to make both of them scroll in the same position and size when the keyboard is appear. I think i have to use UIScrollView as base of both of textview. And then i add the UIScrollView in xib (bot of textview are made in xib too). and this is the picture if this hierarchy : in the viewDidLoad method, i add this code : - (void)viewDidLoad { [super viewDidLoad]; [scrollTextView addSubview:lineNumberTextView]; [scrollTextView addSubview:_codeTextView]; [lineNumberTextView bringSubviewToFront:scrollTextView]; [_codeTextView bringSubviewToFront:scrollTextView]; } but after that i can't scroll anything. What i have to do? thx for the advices

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• MKPinAnnotationView - hard to drag

  - by James Zaghini

  I have a MKPinAnnotationView that the user can drag around the map. It is very difficult for a user to drag the pin. I've tried increasing the frame size and also using a giant custom image. But nothing seems to actually change the hit area for the drag to be larger than default. Consequently, I have to attempt to tap/drag about ten times before anything happens. MKPinAnnotationView *annView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"bluedot"] autorelease]; UIImage *image = [UIImage imageNamed:@"blue_dot.png"]; annView.image = image; annView.draggable = YES; annView.selected = YES; return annView; What am I missing here?

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• Why doesn't BlackBerry let me click on this link?

  - by Steve N

  This is a link in an HTML email.. Other links in this email work, but this one does not get recognized in a BlackBerry as a link, so you can't click on it. Does anyone know why that might be? Here's the markup for it: <a title="Continue" style="display: block; width:200px; border:1px solid #336699; text-align: center; padding-top:5px; padding-bottom:5px; font-size:14px; font-family: Arial, Sans-Serif; color:#336699; font-weight:bold; text-decoration: none;" href="https://www.mydomain.com/mypage.aspx?id=8430650">Continue ››</a>

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• Python - Why ever use SHA1 when SHA512 is more secure?

  - by orokusaki

  I don't mean for this to be a debate, but I'm trying to understand the technical rationale behind why so many apps use SHA1, when SHA512 is more secure. Perhaps it's simply for backwards compatibility. Besides the obvious larger size (128 chars vs 40), or slight speed differences, is there any other reason why folks use the former? Also, SHA-1 I believe was first cracked by a VCR's processor years ago. Has anyone cracked 512 yet (perhaps with a leaf blower), or is it still safe to use without salting?

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• Send serialised object via socket

  - by RubbleFord

  Whats the best way to format a message to a server, at moment I'm serilising an object using the binaryformatter and then sending it to the server. At the server end its listening in an async fashion and then when the buffer size recieved is not 100% it assumes that the transfer has complete. This is working and the moment, and I can deserialise the object at the other end, I'm just concerned that if I start sending async this method will fail has message's could be blurred. I know that I need to mark the message somehow as to say that's the end of message one, this other bit belongs to message 2, but I'm unsure of the correct way to do this. Could anyone point me in the right direction and maybe give me some examples? Thanks

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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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