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• Will moving to Facebook/Disqus Commenting lighten the load on my server any?

  - by sublet

  I manage a site that gets about 50 million hits a month. It's a Wordpress site, load balanced over 6 servers, and has a varnish caching system setup. Right now, 95 - 97% of the time, page views hit the cache. The only time it serves up a new page from the server is when a new story is created, or someone is logged in looking at the stories and commenting. What I am trying to figure out is that if I move over to Facebook Comments or Disqus commenting, and get rid of the users entirely, will that lighten the load? I would think it would because the only time you would be hitting the server, and not the cache, is when you're logged in - which only the admins would be. I know it's only 2.5 - 3% but I wasn't 100% sure.

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• How do I create a background image on web page?

  - by kasha

  I am a new designer so hopefully this question isn't too basic! How do I create a background image on a webpage for a programmer? I designed the page in photoshop and I would like to know how to send the background image (the 25% opacity buildings overlay). I would be happy to send the main image (but it is too large and I imagine would slow the site and loading time drastically). here is the link to the design... http://problemio.com/home_page_1_1.pdf

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• Microsoft Office 2003 document (Excel and Word) intermitently, takes 30 seconds to load

  - by Julio Nobre

  I am trying to figure out why a simple .XLS EXCEL workbook is taking, randomly, 30 seconds to open. Before answering: Please, bear mind the following: Problem symptoms Hanging is intermitent and it takes exactly 30 seconds; During hanging there is no cpu or disk activity; It only happens during document load. Every runs smooth after that; Windows Explorer.exe hangs on folder, but all other folders, system and applications are still responsive; There are no consecutive hangings. I have to wait for while to reproduce this behaviour; All samples documents are located on a local drive (C:\BPI); The no document has has macros and have any addins usage; The problem does occurs on others files extensions like .PDF, for example; Office 2003 is being used for several years; The computer is running Windows XP; Computer has several network mapped drives, all addressed to main file server; Recently, main fileserver was replaced by Windows 2011 SBS Standard Edition What I have done so far I have traced machine Explorer.exe, using Process Monitor, added Duration column, and filtered by Duration 1. That's is how I found that hanging was taking exactly 30 seconds. For further information, please refer to Oliver Salzburg tutorial. Using Process Monitor, I have also figured out than five operations were taking most of sample collecting duration. Looking at sample image below, column Operation below you will notice that one single operation was taking 29 seconds; I have tried different documents (.xls and .doc), all of them smaller than 30 KB; I have, temporarily, removed all shortcuts on User Document's folder that were pointing to network drives or shares; I have runned CCleaner to fix registry issues; I made sure that there were no external links on tested workbook or word documents; I have reproduced this behaviour for hours; I have extensivelly researched for hours on the web; Process Monitor's collected and filtered data

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• how to apply the center of image view for another image view center

  - by maddy

  hi, I am developing image redraw app. i know the center of one image view which is having scaling property. i.e it can change it frame and center . that to be applied to another view center. when i apply center to newly formed Image view it giving wrong center because of the previous image view is having scaling property. so how can i get exact center to my new image view from previous imageview

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• mkisofs - Floppy Image to Disk Image

  - by CommunistPancake

  I'm trying to compile MikeOS on windows. I've successfully (I think) created a floppy (.flp) image of the operating system. I want to convert it to a disk image (.iso) so I can run it in virtual box. I've tried mkisofs -quiet -V 'MIKEOS' -input-charset iso8859-1 -o disk_images/mikeos.iso -b mikeos.flp disk_images/ Which is the command in the Linux build script. It does create an ISO image, but when I try to run in in VirtualBox, I get a black screen. What am I doing wrong? Here's my build script.

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• on hover overlay image in CSS

  - by Juventus

  I need a div with picture bg to overlay an image (with some amount transparency) when hovered on. I need to be able to have one transparent overlay that can be used and reused throughout the site on any image. My first attempt was round-about to say the least. Because I found out you cannot roll-over an invisible div I devised a sandwhich system in which the original image is the first layer, the overlay is the second layer, and the original image is third layer again. This way, when you roll-over, the original image disappears revealing the overlay image over the original image: http://www.nightlylabs.com/uploads/test.html So it works. Kinda. Because of you cannot interact with an visibility:invisible element (why?!) the roll-over flickers unless you rest the cursor on it. Any help? This method is bad so if anyone has a better one please comment.

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• How to Clear an image control in WPF (C#)

  - by antongladchenko

  I have an image control with a source image located in my c drive. I get a message that the image is being used by another process whenever I try to delete the original image to change it with another one dynamically. How do I release the image from the image control to be able to delete it. I tried this variants: string path = ((BitmapImage)img.Source).UriSource.LocalPath; img.SetValue(System.Windows.Controls.Image.SourceProperty, null); File.Delete(path); And: string path = ((BitmapImage)img.Source).UriSource.LocalPath; img.Source = null; File.Delete(path) But it's not work...

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• image loading information with jquery

  - by Pradyut Bhattacharya

  Hi I have a page which has a img holder with the html: - <img src="someimage.jpeg" alt="image" class="show_image"/> Now i m updating the image with jquery using the code... $('.show_image').attr('src', 'anotherimage.jpeg'); Now its working fine but i want to show the users the image is being loaded and may wait as the image size may be huge... Is there any method in jquery to get the information of percent loaded(bytes read/remaining) or if the image load is complete... Also how can i place a div over the image placeholder such that the div can fade the image(opacity:0.8) and add some text over the div as loading or something thanks

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• Help Reading Binary Image Data from SQL Server into PHP

  - by Joe Majewski

  I cannot seem to figure out a way to read binary data from SQL server into PHP. I am working on a project where I need to be able to store the image directly in the SQL table, not on the file system. Currently, I have been using a query like this one: INSERT INTO myTable(Document) SELECT * FROM OPENROWSET(BULK N'C:\image.jpg', SINGLE_BLOB) as BLAH This works fine to actually insert the image into the table, but I haven't yet figured a way to retrieve it and get my image back. I am doing this with PHP, and ultimately will have to make a stored procedure out of it, but can anyone enlighten me on a way to get that binary data (varbinary(MAX)) and generate an image on the fly. I expected it to be simple to use a SELECT statement and add a content-type to the headers that indicated it was an image, but it's simply not working. Instead, the page will just display the name of the file, which I have encountered in the past and understand it to be an error with the image data.

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• An image from byte to optimized web page presentation

  - by blgnklc

  I get the data of the stored image on database as byte[] array; then I convert it to System.Drawing.Image like the code shown below; public System.Drawing.Image CreateImage(byte[] bytes) { System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(bytes); System.Drawing.Image image = System.Drawing.Image.FromStream(memoryStream); return image; } (*) On the other hand I am planning to show a list of images on asp.net pages as the client scrolls downs the page. The more user gets down and down on the page he/she does see the more photos. So it means fast page loads and rich user experience. (you may see what I mean on www.mashable.com, just take care the new loads of the photos as you scroll down.) Moreover, the returned imgae object from the method above, how can i show it in a loop dynamically using the (*) conditions above. Regards bk

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• Trouble adding Image to a JPanel

  - by user1276078

  I'm making a video game, and I need to add an image to a JPanel and then add that JPanel to a JFrame. All of the tutorials I've seen say to add it to a JLabel, but the image needs to be able to move around. Unless you can move a JLabel around, I can't do that. How would I be able to add an Image directly to a JPanel. This is what I have so far, but it is just like it was on a JApplet class Penguin extends JPanel { public Image image; public void paintComponent( Graphics g ) { image = getImage( getDocumentBase(), "Penguins.jpg" ); g.drawImage( image, 0, 0, this ); } }

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• Discovered: Run A Video In An Image

  - by Moon .

  okay i have found the way to run a video in a image.... the procedure as given below 1 - Run a video in Windows Media Player 2 - While the video running, Press Print Screen 3 - Paste it in MS Paint 4 - Save the image in JPEG or BMP format 5 - Run any video in Windows Media Player again 6 - Now open that image, in Windows Page\Fax Viewer or ACDsee etc. 7 - at this time the win. media player is playing and the image is open 8- Switch to image (focus on image) and you will see the currently running video in the image can anybody with extensive knowledge of windows tell me why does this happen. Well this doesn't work in all versions of windows and media players. i tried this on the follwing setup Windows Media Player 10 Windows XP 2006 SP2

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• Delay the display of image loaded using jquery + ajax

  - by niczoom

  I am using the following code : $.ajax({ url: "pgiproxy.php", data: ({ data : $("#formdata").serialize(), mode : "graph"}), success: function(result){ var temp = $('<div/>').html(result); var val = temp.find('center').html(); $('#BFX').html(val); }, error: function(){ $("#error").html("ERROR !!!"); } }); The 'result' from the ajax call to 'pgiproxy.php' is a whole web page (returned as a string), this is then converted to a jQuery object and stored in 'var'. I then extract the data I need (a .gif image) using .find() which is stored in 'val'. This image is then inserted into a #BFX div for display. My problem is every successive time I click my button to update this image it shows the image loading from top to bottom as it is reading it in from the web. Is there a way to only display this image once it has fully loaded so the user doesnt see the image loading and only sees the image change instantly.

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• BlackBerry - Cropping image

  - by rupesh

  Hi all i want to crop a part of Image ,for that i am using following code: int x=20; int y=50; int [] rgbdata=new int[(0+width-x+height-y)* (image.getWidth())]; image.getARGB(rgbdata, 0, image.getWidth(), x, y, width, height); cropedImage=new Bitmap(image.getWidth(),image.getWidth()); cropedImage.setARGB(rgbdata, 0,image.getWidth(), 80,80, width, height); x an y are the position from where the cropping will be done in the rectangular form. but it is not working can any one help me out please. any sample code will work for me. its urgent. thanks in advance

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• Light effect with image magick

  - by GuilhermeA

  Hello, I'm using ImageMagick to resize an image to a smaller size gif. In this process I'm trying to give the image a light effect, not a side-light, just like a shiny look all over. Not a good comparison but for a better understanding think of an image seen in a old screen or an image seen in glossy monitor - I'm trying to enhance the image the closest to this point. An important point is that I can't make a image-to-image treatment, it must be something that I can use in all the images. I know ImageMagick is a powerful tool, and can certainly do something for my images! Many thanks!

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• python convert 12 bit image encoded in a string to 8 bit png

  - by ks

  I have a string that is read from a usb apogee camera that is a 12-bit grayscale image with the 12-bits each occupying the lowest 12 bits of 16-bits words. I want to create a 8-bit png from this string by ignoring the lowest 4 bits. I can convert it to a 16-bit image where the highest 4 bits are always zero using PIL with import Image imageStr is the image string imageSize is the image size img=Image.fromstring("I", imageSize, imageStr, "raw", "I;16", 0,1) img.save("MyImage.png", "PNG") Anyway I can do something similar to create a 8-bit image without completely unpacking the string doing arithmetic and making a new string?

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• AWS Load balancer connection reset

  - by joshmmo

  I have an ELB set up with two instances. The issue I have with it is that when I do not add www. to it, the ELB just hangs. This is some info I get when I spider with wget: Spider mode enabled. Check if remote file exists. --2013-06-20 13:40:54-- http://learning.example.com/ Resolving learning.example.com... 54.xxx.x.x53, 50.xx.xxx.x71 Connecting to learning.example.com|54.xxx.x.x53|:80... connected. HTTP request sent, awaiting response... No data received. Retrying. when I add www. it works great. I have a GoDaddy SSL cert that I added to the listener section that covers 3 domains, www.learning.example.com, files.learning.example.com and learning.example.com. These are my listener settings: - HTTP 80 HTTPS 443 N/A N/A - SSL 443 SSL 443 Change canvasNew (Change) My EC2 instances are running apache2 on Ubuntu 12.04. I will be happy to post my vhosts file if needed. However, when I ran the server with the domains pointing to just one EC2 instance things worked fine. How can I fix this issue for learning.example.com? Why does www work just fine? A second question would be what is the difference between instance protocol and load balancer protocol? EDIT: Here are the dig results for learning.example.com from yesterday. I changed the DNS entry to point to one instance to make sure it was the elb. When I switch it back I will do it for www.learning.example.com ; <<>> DiG 9.9.1-P2 <<>> learning.example.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20210 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;learning.example.com. IN A ;; ANSWER SECTION: learning.example.com. 2559 IN CNAME canvas-22222222222.us-west-1.elb.amazonaws.com. canvas-22222222222.us-west-1.elb.amazonaws.com. 60 IN A 54.xxx.x.x53 canvas-22222222222.us-west-1.elb.amazonaws.com. 60 IN A 50.xx.xxx.x71 ;; Query time: 83 msec ;; SERVER: 10.x.xx.20#53(10.x.xx.20) ;; WHEN: Thu Jun 20 13:40:47 2013 ;; MSG SIZE rcvd: 137 EDIT 2: Here is some more info that might be helpful. Port Configuration: 80 (HTTP) forwarding to 443 (HTTPS) Backend Authentication: Disabled Stickiness: Disabled(edit) 443 (SSL, Certificate: canvasNew) forwarding to 443 (SSL) Backend Authentication: Disabled So I switched everything to one EC2 IP address to bypass the elb to make sure things are working. It's running great. www and the non-www url work perfectly fine. Its only when I switch things to the ELB that learning.example.com hangs and www.learning.example.com works. Hopefully you can get some ideas flowing.

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• Optimizing apache server load

  - by Jevgeni Smirnov

  We have an issue with a dedicated server load. We have 16 processors with 4 core @ 2.40GHz, if I understood correctly cat /proc/cpuinfo output. Unfortunately, I don't have access to free -m or vmstat. But from top I got that we have 24 GB. And snapshot from top about processes: As far as I see, memory is not used at all. But the cpu is used heavily. Apache consumes most of CPU. Another useful piece of information: Every 1.0s: ps u -C httpd,mysqld,php Tue Mar 27 10:48:19 2012 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 7476 0.0 0.1 446808 37880 ? SNs Mar06 0:43 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf mysql 36061 41.6 2.1 1113672 529876 ? SNl Feb20 21503:48 /opt/zone/sbin/mysqld --basedir=/opt/zone --datadir=/srvdata/mysql --user=mysql --log-error=/srvdata/mysql/dn79.err --pid-file=/srvdata/mysql/mysqld.pid --socket=/tmp/mysql.sock --port=3306 root 37257 0.0 0.0 424056 16840 ? SNs Mar22 1:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 52743 0.0 0.1 447100 30360 ? SN 10:40 0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf http 52744 0.0 0.1 447100 30360 ? SN 10:40 0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf http 52745 0.0 0.1 447100 30360 ? SN 10:40 0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf http 52746 0.0 0.1 447100 30360 ? SN 10:40 0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf http 52747 0.0 0.1 446956 30324 ? SN 10:40 0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf http 52980 69.1 1.8 852468 458088 ? RN 10:41 5:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 53483 47.0 0.8 615088 221040 ? RN 10:43 2:05 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 53641 1.8 0.2 446580 54632 ? SN 10:45 0:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54384 81.2 0.9 625828 229972 ? RN 10:45 2:14 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54411 47.7 0.5 535992 142416 ? RN 10:45 1:09 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54470 41.7 0.4 512528 120012 ? RN 10:46 0:54 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54475 0.1 0.1 437016 41528 ? SN 10:46 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54486 1.5 0.2 445636 53916 ? SN 10:46 0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54531 2.5 0.2 445424 53012 ? SN 10:46 0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54549 0.0 0.0 424188 9188 ? SN 10:46 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54642 0.0 0.0 424188 9200 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54651 0.0 0.0 424188 9188 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54661 0.0 0.0 424188 9208 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54663 6.9 0.2 449936 58560 ? SN 10:47 0:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54666 6.0 0.2 453356 61124 ? SN 10:47 0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54667 2.8 0.1 437608 42088 ? SN 10:47 0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54670 1.5 0.1 437540 42172 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54672 2.1 0.1 439076 43648 ? SN 10:47 0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54709 0.0 0.0 424188 9192 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54711 1.0 0.1 437284 41780 ? SN 10:47 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54712 11.8 0.2 448172 54700 ? SN 10:47 0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54720 0.0 0.0 424188 9192 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54721 0.0 0.0 424188 9188 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54747 9.1 0.2 443568 51848 ? SN 10:48 0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54782 1.8 0.1 438708 37896 ? RN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54784 0.0 0.0 424188 9180 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54785 0.0 0.0 424188 9188 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54789 0.0 0.0 424188 9188 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54790 0.0 0.0 424188 9188 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54791 0.0 0.0 424188 9188 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 http 54792 0.0 0.0 424056 8352 ? SN 10:48 0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0 Webalizer shows following: What can be done in the following situation? The application is Magento.

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• Good library to load images of different formats

  - by codymanix

  Hi Iam developing an image viewer application just like irfan-view or acdsee which should be capable to view lots of different image file formats (not just the standard ones which can be done with System.Drawing.Image). Iam currently using ImageMagick but it isn't very fast and seems to be unstable with some image files. Can anyone suggest a good imaging library, ideally with a .NET wrapper already present?

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• Ubuntu apt-get install linux-image

  - by Karl Kloppenborg

  I'd like someone to enlighten me as to what exactly goes on with aptitude when I want a kernel. As we all know, there's pretty much the following kernel option: linux-image-generic linux-image-server linux-image-virtual This morning I did an install and it had linux-image-generic on it, so I ran the following: apt-get -y remove linux-image-* This removed all my kernels as expected, I followed suit with running: apt-get install linux-image-virtual Says I've installed linux-image-server!? Am I missing something here, because I checked twice and it did it twice, however if I manually select a kernel (in my instance I used: linux-image-2.6.35-30-virtual) it will install linux-image-virtual. This seems rather strange to me? Details: Running Ubuntu 9.10 Am I missing something? :)

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• Silverlight Image Loading Question

  - by Matt

  I'm playing around with Silverlight Images and a listbox. Here's the scenario. Using WCF I grab some images out of my database and, using a custom class, add items to a listbox. It's working great right now. The images load and appear in the listbox, just like I want them to. I want to refine and improve my control just a little more so here's what I've done. <ListBox x:Name="lbMedia" Background="Transparent" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Auto"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <c:WrapPanel></c:WrapPanel> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <im:MediaManagerItem></im:MediaManagerItem> </DataTemplate> </ItemsControl.ItemTemplate> </ListBox> Just a simple listbox. The datatemplate is a custom control and literally it contains a contentpresenter, nothing more. Now the class that I use as the ItemSource has a Source property. Here's what it looks like. private UIElement _LoadingSource; private UIElement _Source; public UIElement Source { get { if( _Source == null ) { LoadMedia(); return new LoadingElement(); } return _Source; } set { if( !( value is Image ) && !( value is MediaElement ) ) throw new Exception( "Media Source must be an Image or MediaElement" ); _Source = value; NotifyPropertyChanged( "Source" ); } } Essentially, on the get I check if the image/video has been loaded from the server. If it hasn't I return a loading control, then I proceed to load my image. Here's the code for my LoadMedia method. private void LoadMedia() { if( _Media != null && _Media.MediaId > 0 ) { //load the media BackgroundWorker mediaLoader = new BackgroundWorker(); mediaLoader.DoWork += mediaLoader_DoWork; mediaLoader.RunWorkerCompleted += mediaLoader_RunWorkerCompleted; mediaLoader.RunWorkerAsync(); } } void mediaLoader_RunWorkerCompleted( object sender, RunWorkerCompletedEventArgs e ) { if(_LoadingSource != null) Source = _LoadingSource; } void mediaLoader_DoWork( object sender, DoWorkEventArgs e ) { string url = App.siteUrl + "download.ashx?MediaId=" + _Media.MediaId; SmartDispatcher.BeginInvoke( () => { Image img = new Image(); img.Source = new BitmapImage( new Uri( url, UriKind.Absolute ) ); _LoadingSource = img; } ); } So as the code goes, I create a new image element, and set the Uri. The images that I'm downloading take about 2-5 seconds to download. Now for the problem / fine tuning. Right now my code will check if the source is null and if it is, return a loading element, and run the background worker to get the image. Once the background worker finishes, set the source to the new downloaded image. I want to be able to set the Source property AFTER the image has fully downloaded. Right now my loading element appears for a brief second, then there's nothing for 2-5 seconds until the image finishes downloading. I want the loading elements to stick around until the image is completely ready but I'm having troubles doing this. I've tried adding a a listener to the ImageOpened event and update the Source property then, but it doesn't work. Thanks in advance.

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• Scaling an image using the mouse in C#

  - by Gaax

  Hey guys... I'm trying to use the position of the mouse to calculate the scaling factor for scaling an image. Basically, the further you get away from the center of the image, the bigger it gets; and the closer to the center you get, the smaller it gets. I have some code so far but it's acting really strange and I have absolutely no more ideas. First I'll let you know, one thing I was trying to do is average out 5 distances to get a more smooth resize animation. Here's my code: private void pictureBoxScale_MouseMove(object sender, MouseEventArgs e) { if (rotateScaleMode && isDraggingToScale) { // For Scaling int sourceWidth = pictureBox1.Image.Width; int sourceHeight = pictureBox1.Image.Height; float dCurrCent = 0; // distance between the current mouse pos and the center of the image float dPrevCent = 0; // distance between the previous mouse pos and the center of the image System.Drawing.Point imgCenter = new System.Drawing.Point(); imgCenter.X = pictureBox1.Location.X + (sourceWidth / 2); imgCenter.Y = pictureBox1.Location.Y + (sourceHeight / 2); // Calculating the distance between the current mouse location and the center of the image dCurrCent = (float)Math.Sqrt(Math.Pow(e.X - imgCenter.X, 2) + Math.Pow(e.Y - imgCenter.Y, 2)); // Calculating the distance between the previous mouse location and the center of the image dPrevCent = (float)Math.Sqrt(Math.Pow(prevMouseLoc.X - imgCenter.X, 2) + Math.Pow(prevMouseLoc.Y - imgCenter.Y, 2)); if (smoothScaleCount < 5) { dCurrCentSmooth[smoothScaleCount] = dCurrCent; dPrevCentSmooth[smoothScaleCount] = dPrevCent; } if (smoothScaleCount == 4) { float currCentSum = 0; float prevCentSum = 0; for (int i = 0; i < 4; i++) { currCentSum += dCurrCentSmooth[i]; } for (int i = 0; i < 4; i++) { prevCentSum += dPrevCentSmooth[i]; } float scaleAvg = (currCentSum / 5) / (prevCentSum / 5); int destWidth = (int)(sourceWidth * scaleAvg); int destHeight = (int)(sourceHeight * scaleAvg); // If statement is for limiting the size of the image if (destWidth > (currentRotatedImage.Width / 2) && destWidth < (currentRotatedImage.Width * 3) && destHeight > (currentRotatedImage.Height / 2) && destWidth < (currentRotatedImage.Width * 3)) { AForge.Imaging.Filters.ResizeBilinear resizeFilter = new AForge.Imaging.Filters.ResizeBilinear(destWidth, destHeight); pictureBox1.Image = resizeFilter.Apply((Bitmap)currentRotatedImage); pictureBox1.Size = pictureBox1.Image.Size; pictureBox1.Refresh(); } smoothScaleCount = -1; } prevMouseLoc = e.Location; currentScaledImage = pictureBox1.Image; smoothScaleCount++; } }

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• Conceptually how does load-balancing on the EJB tier work in Glassfish/any ejb container

  - by Benju

  I am wondering conceptually how load-balancing works on the EJB-level (not web session replication) with Java EE containers like Glassfish. From what I have gleaned your remote interface is a proxy that delegates your call to one of many servers you may have in an environment. If things fail are they supposed to be able to "finish" on another server? I want to understand the basic theory behind this load balancing, why is it better than a bunch of servers all running a plain web application with session affinity on a load-balancer?

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• jQuery: Dynamic image handling (waiting for load)

  - by dclowd9901

  I'm trying to write a plugin that has a built in function to wait until all images that are on the page to be loaded before it executes itself. $(window).load() only works if it's the initial load of the page, but if someone wants to pull down some HTML through AJAX that contains images, it doesn't work. Is there any good way of doing this AND implementing it so that it can be self-contained in the plug-in? I've tried looping over $('img').complete, and I know that doesn't work (the images never load, and the browser crashes under a "script takes too long to complete" bug). For an example of what I'm trying to do, visit the page I'm looking to house the plugin at: http://www.simplesli.de If you go to the "more uses" section (click it on the nav bar), you'll see that the image slideshow won't load properly. I know the current code doesn't work, but it's just holding place until I figure something out.

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• jQuery .load() XHTML issue

  - by Urfe

  I am having some strange problems loading content from another XHTML page via jQuery. When the second page I try to load from is served as XHTML I get the below error. I don't know if it helps but both documents validate when I get the error. Uncaught Error: NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7 Currently the header on the second page I load from is: <?xml version="1.0" encoding="iso-8859-1" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta name="language" content="en" /> <title>some title</title> <!-- CSS & Javascript included here --> </head> The content type is set as: application/xhtml+xml;charset=iso-8859-1 Interestingly, when I remove all the XHTML stuff from the header and stop setting the content type the error does not occur and everything works great. The load process currently looks like the below. It works fine when everything is plain HTML. $('#overpage').find(".wrap").load(this.getTrigger().attr("href")+" #op").show(); I'm curious why the process only does not work when the second page I load from is XHTML. I don't want to serve the page as just plain HTML and am looking for advice on what I am doing wrong. Both pages validate and I'm really scratching my head here. Many thanks!

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