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• How to connect 2 virtual hosts running on the same machine?

  - by Gabrielle

  I have 2 virtual hosts running on my Windows XP laptop. One is Ubuntu running inside vmware player. The other is MS virtual PC (so I can test with IE6 ). The Ubuntu virtual host is running my web application with apache. I can point my browser on my laptop at the Ubuntu IP and view my web app. I read this post http://stackoverflow.com/questions/197792/how-to-connect-to-host-machine-from-within-virtual-pc-image and was able to get my Virtual PC to ping my physical machine using the loopback adapter. But I'm stuck on getting my Virtual PC to see my web application running in the Ubuntu vmware player host. I appreciate any suggestions.

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• What to beware of reading old Numarray tutorials and examples?

  - by DarenW

  Python currently uses Numpy for heavy duty math and image processing. The earlier Numeric and Numarray are obsolete, but still today there are many tutorials, notes, sample code and other documentation using them. Some of these cover special topics of interest, some are well written but haven't been updated or replaced, or are otherwise of use. Quite a bit is the same between Numeric, Numarray and Numpy, so I usually get good mileage out these older docs. Ocassionaly, though, I run into a line of code that results in error. Not often enough to remember how to get around it, but usually I figure it out at the cost of some time. What are the main things to watch out for when relying on such older documentation for current Numpy use? Is there a list of how to translate the differences that exist?

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• Different background colors for the top and bottom of a UITableView

  - by Aaron Brethorst

  If you look at your Inbox in iPhone OS 3.0's Mail app, you'll see that swiping down displays a grayish background color above the UISearchBar. Now, if you scroll down to the bottom of the table, you'll see that the background color at that end is white. I can think of a couple ways of solving this problem, but they're pretty hacky: Change the table view's background color depending on the current scrollOffset by overriding -scrollViewDidScroll: Give the UITableView a clear background color and then set its superview's backgroundColor to a gradient pattern image. Does anyone know what the "best practice" solution is for this problem? thanks.

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• Marker on Google Map added only once.

  - by Vafello

  I have the following code: function clicked(overlay, latlng) { var icon3 = new GIcon(); icon3.image = "marker.png"; icon3.iconAnchor = new GPoint(15, 40); var marker2 = new GMarker(latlng, { icon: icon3, draggable: true, title: 'Drag me' }); map.addOverlay(marker2); } Each time I click on the map a new marker is placed on the map. The problem is that I need only one marker and if I click several times, each time a new marker is added. How to change the code so only one marker is placed and when the map is clicked again it just changes its location?

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• Is OpenGL required for my iPhone game?

  - by Ben X Tan

  On an iPhone: If I am writing a game that has multiple levels, with multiple animations (image sequences), jpg and png (transparent), some full screen and some not, some looped and some played once only. What is the best way of doing it? Each level might have up to 10MB of images. Add on to this music, and video (cut scenes). All 2D graphics, no 3D models. Is OpenGL required? Or can this be achieved with Quartz or Core Animation?

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• Make JQuery UI Dialog automatically grow HEIGHT to fit its contents (width remains static)

  - by Zack Macomber

  Having looked into How can I make a JQuery UI Dialog automatically grow or shrink to fit its contents?, I am using the height: "auto" option when building a jQuery modal dialog box: $( "#dialog-message" ).dialog({ autoOpen: false, width: "400", height: "auto", show: "slide", modal: true, buttons: { Ok: function() { $( this ).dialog( "close" ); } } }); However, the height isn't "growing" to fit all of the contents. I'm still seeing a vertical scrollbar as in this image: Is there a way right in the definition code I listed to ensure that the height grows enough so that a vertical scrollbar doesn't show? Or, do I need to do this programmatically before opening the dialog box? Edit 1 Not sure why, but Chrome is displaying this fine but IE 8 isn't. I need it to specifically work in IE 8 so I believe I'm just going to put a bottom margin on the text.

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• How to read remote video on Amazon S3 using ffmpeg

  - by virtualize

  I need to create poster frames from videos hosted on Amazon S3 via ffmpeg. So is there a way to use the remote video file directly in ffmpeg command line like this: ffmpeg -i "http://bucket.s3.amazonaws.com/video.mp4" -ss 00:00:10 -vframes 1 -f image2 "image%03d.jpg" ffmpeg just returns: http://bucket.s3.amazonaws.com/video.mp4: I/O error occurred Usually that means that input file is truncated and/or corrupted. I also tried forcing ffmpeg to use the videos mp4 container for reading: ffmpeg -f mp4 -i "http://bucket.s3.amazonaws.com/video.mp4" ... But no luck. Wget this video from S3 and processing it locally works fine of course, as well as reading the file remotely from other 'standard' http servers. So I know that ffmpeg supports remote file reading, but why not on S3?

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• Queue remote calls to a Python Twisted perspective broker?

  - by agartland

  The strength of Twisted (for python) is its asynchronous framework (I think). I've written an image processing server that takes requests via Perspective Broker. It works great as long as I feed it less than a couple hundred images at a time. However, sometimes it gets spiked with hundreds of images at virtually the same time. Because it tries to process them all concurrently the server crashes. As a solution I'd like to queue up the remote_calls on the server so that it only processes ~100 images at a time. It seems like this might be something that Twisted already does, but I can't seem to find it. Any ideas on how to start implementing this? A point in the right direction? Thanks!

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• GridView items are displaying the wrong drawables sometimes.

  - by originalbryan

  I've implemented a GridView based on this tutorial. It works great unless open up the search dialog or rotate the screen then scroll around. When the search dialog and virtual keyboard appear, the drawables for each of my grid items shift. I can click on them and they do what I expect, except the drawable is wrong. The same problem happens when I go into landscape mode and scroll around. If I scroll down, up, the down again, the drawables are shuffled. For better illustration, let's say I have three objects, each with an image. Obj A shows an Apple Obj B shows a Banana Obj C shows a Cantaloupe When the shift occurs I end up with: Obj A shows an Cantaloupe Obj B shows a Banana Obj C shows a Apple The problem isn't consistent between the two causes (search dialog and screen rotate n' scroll), but each cause itself is consistent. Scrolling around repeatedly reveals a pattern as does the search dialog appearing. How can I stop this from happening?

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• Difference in css position IF/FF, how to solv my problem?

  - by Jason94

  Ive made some divs and it works as intended in firefox: http://yfrog.com/0y95240044p But not in internet explorer 8: http://yfrog.com/0obadpp Anyone have a tip? structure is like this: <div id="container"> <div id="imgContainer"> <div id="button"></div> </div> <div id="text">text</div> </div> imgContainer gets a image as background by some javascript magic.

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• Using type hints in Clojure for Java return values

  - by mikera

  I'm working on some Java / Clojure interoperability and came across a reflection warning for the following code: (defn load-image [resource-name] (javax.imageio.ImageIO/read (.getResource (class javax.imageio.ImageIO) resource-name))) => Reflection warning, clojure/repl.clj:37 - reference to field read can't be resolved. I'm surprised at this because getResource always returns a URL and I would therefore expect the compiler to use the appropriate static method in javax.imageio.ImageIO/read. The code works fine BTW so it is clearly finding the right method at run time. So two questions: Why is this returning a reflection warning? What type hint do I need to fix this?

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• Caurina Tweener and Alpha

  - by Jk_

  Hi guys, Usually I work with TweenLite but I had to modify the code of someone else who worked with Caurina Tweener. I have a basic problem with it! On my scene, I have a simple movie clip filled with black. Into this movieclip a bitmap file (jpg). When I make a tween on the alpha of my mc, it seems that there is a delay (in the alpha) between this the black background and the image. Tweener.addTween(thisMc, { _autoAlpha:0, time:1 } ); I'm sure there is an easy way to avoid this problem but I can't find it out! Cheers, Jk_

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• Building and rendering a bitmap from a double array

  - by Ami

  I'm new to c# and I'm sure I'm missing something simple here. I'm trying to build a bitmap from integer values (0-255) in a double array and then render it in a PictureBox. I think my Bitmap is getting generated but it isn't displaying in my PictureBox. Bitmap bmp = new Bitmap(image_width, image_height); Color pxl_color = new Color(); for (int i = 0; i < image_width; i++) { for (int j = 0; j < image_height; j++) { pxl_color = Color.FromArgb(array_bitmap[i][j]); bmp.SetPixel(i, j, pxl_color); } } PictureBox1.Image = bmp; Thanks in advance.

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• Page break between columns group in RDCL report

  - by sintetico82

  I have on table matrix with columns group. I want that the table length is break on new page if change the group value. Example of my table; GROUP COLUMN 1 | GROUP COLUMN 2 |mounth1 | month2 | month3 | mounth4 | month5 | month6 TEXT1 | ............................................................ TEXT1 | ............................................................ Some one can help me? EDIT: I uploaded an image of the report. It's a very simple matrix table. I would like page break after the "Periodo" column its was changed value. Thank...

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• How does NetBeans' Splash Screen feature work?

  - by Pam

  New to NetBeans and just noticed that in the File Project Properties Application dialog there is a text field labeled Splash Screen that allows you to specify a path to an image that you would like displayed when your program is launching. I want to customize the way my splash screen works (adding a progress bar, etc.) and would like to code it from the ground up but don't know where to start. What are the best practices for Java/Swing-based splash screens? Thanks for any and all input!

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• Base64 Encoded Data - DB or Filesystem

  - by Marty

  I have a new program that will be generating a lot of Base64 encoded audio and image data. This data will be served via HTTP in the form of XML and the Base64 data will be inline. These files will most likely break 20MB and higher. Would it be more efficient to serve these files directly from the filesystem or would it be feasible to store the data in a MySQL database? Caching will be set up but overall unnecessary because it is likely that this data will be purged shortly after it is created and served. i know that storing binary data in the DB is frowned upon in most circumstances but since this will all be character data I want to see what the consensus is. As of now, I am leaning toward storing them in the filesystem for efficiency reasons but if it is feasible to store them in a database it would be much easier to manage the data.

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• Distributing a function over a single dimension of an array in MATLAB?

  - by Alex Feinman

  I often find myself wanting to collapse an n-dimensional matrix across one dimension, and can't figure out if there is a concise incantation I can use to do this. For example, when parsing an image, I often want to do something like this. (Note! Illustrative example only. I know about rgb2gray for this specific case.) img = imread('whatever.jpg'); s = size(img); for i=1:s(1) for j=1:s(2) bw_img = mean(img(i,j,:)); end end I would love to express this as something like: bw = on(color, 3, @mean); or bw(:,:,1) = mean(color); Is there a short way to do this?

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• Migrating a simple application from Application Delegate to ViewController Class

  - by eco_bach

  Hi Frst of all wanted to send out a huge thanks for the great feedback and support. I have a simple application working, right now simply loads a sequence of images and alows the user to step thru the images by clicking a button. All of my logic is in my Application Delegate class, with the image loading, initialization of UIImage Views etc happening in my applicationDidFinishLaunching method. My next step is to migrate as much as possible all of the logic from this class to a ViewController, to take advantage of the extra functionality etc in viewcontrollers. All my images and imageViews are initialized like the following in my applicationDidFinishLaunching. img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@image1.jpg" ofType:nil]]; imgView = [[UIImageView alloc] initWithImage:img]; How would I migrate this to a ViewController based application? Where would I put all of the logic currently in my applicationDidFinishLaunching method, or for loading of images, is it necessary to only load them here? Any feedback, tips, suggestions appreciated.

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• jqueryui progress bar options like transparency and text

  - by cf_PhillipSenn

  Can I have text in the background of a jQuery UI progress bar? You know the kind I'm talking about don't you? The kind that where color:white because the progress bar is over it, and color:black because the progress bar hasn't reached it yet. I think I've seen that type of effect while installing software. Also, what about a background-image, which works, except that it is totally covered up by the progress bar? I'd like for the progress bar itself to be a little bit transparent.

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• JQuery Selector - Select this, not that?

  - by JasonS

  Hi, I have created a script which is surprisingly working. (I do not do much JavaScript) What I have is a load of images listed within a div. These images are hidden. JQuery gets the properties of the images and puts them into an array. When the body is clicked, the background image of the page changes. This works nicely. However, I now have a problem. There are several elements which I shouldn't change the background when they are clicked. Namely, navigation, footer and caption. How do I create a selector which makes the body clickable, yet ignores clicks on the above 3 div's?

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• Element point map for html5 canvas element, need algorithm

  - by Artiom Chilaru

  I'm currently working on a pure html 5 canvas implementation of the "flying tag cloud sphere", which many of you have undoubtedly seen as a flash object in some pages. The tags are drawn fine, and the performance is satisfactory, but there's one thing in the canvas element that's kind of breaking this idea: you can't identify the objects that you've drawn on a canvas, as it's just a simple flat "image".. What I have to do in this case is catch the click event, and try to "guess" which element was clicked. So I have to have some kind of matrix, which stores a link to a tag object for each pixel on the canvas, AND I have to update this matrix on every redraw. Now this sounds incredibly inefficient, and before I even start trying to implement this, I want to ask the community - is there some "well known" algorithm that would help me in this case? Or maybe I'm just missing something, and the answer is right behind the corner? :)

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• CImg compile problems in Codegear 2009

  - by Seth

  I wish to use the CImg library for image processing in my current project. I am using Codegear C++ Builder 2009. I include CImg.h in the source file and put in the following code: int rows =5; int cols = 5; CImg<double> img(rows,cols); I get the following error: [BCC32 Error] CImg.h(39159): E2285 Could not find a match for 'CImg<unsigned char>::move_to<t>(const CImg<unsigned char>)' Does anyone know if there is a #define I should be using when building in Codegear C++ Builder 2009. Or is it simply not compatible?

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• How to display the rss version of a News Link

  - by cbrown16

  I'm trying to write a script that will show the rss version of a single url (title, author, image, source, etc..). This should behave much the way that facebook does when you copy paste a link to share and it generates this information automatically. I'm trying to do this with a php script but would also be open to opensource programs that can do this as well. also, if anyone knows of any Joomla/Drupal plugins that can do this that would be great. This may eventually end up on a site run on one of these frameworks. thanks!!

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• Animate opacity on hover (jQuery)

  - by Glister

  We have a link: <a href="#"> Some text <span style="width: 50px; height: 50px; background: url(image.png); overflow: hidden; opacity: 0;"></span> </a> And we want to change opacity of <span> with some animation, when the link is hovered. How would we do it?

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• Html + Css: How to create a auto-resizing rotated background?

  - by Sebastian P.R. Gingter

  Hi, image a complete black web page. On this web page is a 100% size white div that fills the whole page. I'd like to rotate this div by -7 degrees (or 7 degrees counter-clock wise). This will result in the black background being visible in triangles on the edges, just like you had placed a piece of paper on a desk and turned it a bit to the left. Actually this can be done with some css and it's working quite well (except for IE). The real problem now is: I'd like to have a normal, non-rotated div element on top of that to display the content in, so that only the background is rotated. Rotating a contained div counterwise doesn't work though, because through the two transformations the text will be blurry in all browsers. How can I realize that? Best would be a solution workiing in current Webkit browsers, FF3.5+ and IE7+. If only IE8+ I could live with that too.

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