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• Optimizing drawing on UITableViewCell

  - by Brian

  I am drawing content to a UITableViewCell and it is working well, but I'm trying to understand if there is a better way of doing this. Each cell has the following components: Thumbnail on the left side - could come from server so it is loaded async Title String - variable length so each cell could be different height Timestamp String Gradient background - the gradient goes from the top of the cell to the bottom and is semi-transparent so that background colors shine through with a gloss It currently works well. The drawing occurs as follows: UITableViewController inits/reuses a cell, sets needed data, and calls [cell setNeedsDisplay] The cell has a CALayer for the thumbnail - thumbnailLayer In the cell's drawRect it draws the gradient background and the two strings The cell's drawRect it then calls setIcon - which gets the thumbnail and sets the image as the contents of the thumbnailLayer. If the image is not found locally, it sets a loading image as the contents of the thumbnailLayer and asynchronously gets the thumbnail. Once the thumbnail is received, it is reset by calling setIcon again & resets the thumbnailLayer.contents This all currently works, but using Instruments I see that the thumbnail is compositing with the gradient. I have tried the following to fix this: setting the cell's backgroundView to a view whose drawRect would draw the gradient so that the cell's drawRect could draw the thumbnail and using setNeedsDisplayInRect would allow me to only redraw the thumbnail after it loaded --- but this resulted in the backgroundView's drawing (gradient) covering the cell's drawing (text). I would just draw the thumbnail in the cell's drawRect, but when setNeedsDisplay is called, drawRect will just overlap another image and the loading image may show through. I would clear the rect, but then I would have to redraw the gradient. I would try to draw the gradient in a CAGradientLayer and store a reference to it, so I can quickly redraw it, but I figured I'd have to redraw the gradient if the cell's height changes. Any ideas? I'm sure I'm missing something so any help would be great.

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• Is my form password being passed in clear text?

  - by liinkas

  This is what my browser sent, when logging into some site: POST http://www.some.site/login.php HTTP/1.0 User-Agent: Opera/8.26 (X2000; Linux i686; Z; en) Host: www.some.site Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1 Accept-Language: en-US,en;q=0.9 Accept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1 Accept-Encoding: deflate, gzip, x-gzip, identity, *;q=0 Referer: http://www.some.site/ Proxy-Connection: close Content-Length: 123 Content-Type: application/x-www-form-urlencoded lots_of_stuff=here&e2ad811=my_login_name&e327696=my_password&lots_of_stuff=here Can I state that anyone can sniff my login name and password for that site? Maybe just on my LAN? If so (even only on LAN ) then I'm shocked. I thought using <input type="password"> did something more than make all characters look like ' * ' p.s. If it matters I played with netcat (on linux) and made connection browser <= netcat (loged here) <= proxy <= remote_site

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• Change a UIButton View's background upon press

  - by Michael

  This should be easy but its got me stumped. I've got a button on each row of a table cell. The button is to delete the file associated with that row. I have an image that indicates if the file is present on the iPhone or not present. When the user presses the button, the target action method (showDeleteSheet) then calls a UIActionSheet with a variable to give it the indexPath of the row pressed. Then the user presses delete on the action sheet and the action sheet's clickedButtonAtIndex method deletes the file. Now, I need to update the button's background image property to change the image in the appropriate table cell to the not downloaded image. This can be done in either the button's target action method or the action sheet's clickedButtonAtIndex method. Here is some code: In the table's cellForRowAtIndexPath method I create the button: UIButton *deleteButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; [deleteButton addTarget:self action:@selector(showDeleteSheet:) forControlEvents:UIControlEventTouchDown]; deleteButton.frame = CGRectMake(246, 26, 30, 30); if (![AppData isDownloaded:[dets objectForKey:@"fileName"]]) { [deleteButton setBackgroundImage:notdownloadedImage forState:UIControlStateNormal]; } else { [deleteButton setBackgroundImage:notdownloadedImage forState:UIControlStateNormal]; } In the button's target method: -(void)showDeleteSheet:(id)sender { //get the cell row that the button is in NSIndexPath *indexPath = [table indexPathForCell:(UITableViewCell *)[[sender superview] superview]]; NSInteger currentSection = indexPath.section; NSInteger currentIndexRow = indexPath.row; NSLog(@"section = %i row = %i", currentSection, currentIndexRow); UIButton *deleteButton = [UIButton buttonWithType:UIButtonTypeCustom]; [table reloadData]; //if deleteButton is declared in .h then the other instances of deleteButton show 'local declaration hides instance variable' [deleteButton setBackgroundImage:[UIImage imageNamed:@"not-downloaded.png"] forState:UIControlStateNormal]; UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Delete this file?" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Delete" otherButtonTitles:nil]; actionSheet.tag = currentIndexRow; actionSheet.actionSheetStyle = UIActionSheetStyleDefault; [actionSheet showInView:self.view]; [actionSheet release]; } Perhaps the issue is that the call to [deleteButton setBackgroundImage...]; doesn't know which cell's button should be updated. If so I don't know how to tell it which. Because I test if the file is downloaded when the button is made and the background image is set, when I scroll down so the cell in question is de-queued then scroll back up it show's the correct image. I've tried to force the table to reload but [table reloadData]; is doing nothing. I've tried reloadRowsAtIndexPaths and still no good. Any one care to educate me on how this is done?

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• How to install Ubuntu over http in virtual manager?

  - by Bond

  Hi, I am having a situation where I can not use a CD or PxE boot or wubi to install.I need to necessarily do an http install of Ubuntu.I am basically trying to create a guest OS in a virtualization setup on Xen on a non VT hardware. On a non VT hardware the virt-manager does not allow to install from local ISO or PXE even the only option is via a URL on http:// Here is what I did: 1) Download ubuntu 10.04 32 bit ISO 2) Kept it in /var/www (apache2 is running) 3) renamed it to ubuntu.iso and when I reached a stage where installation begins I gave path hxxp://localhost/ubuntu.iso but I got an error any installable distribution not found. 4) After this I did mkdir /var/www/sk mount -t iso9660 /var/www/ubuntu.iso /var/www/sk -o loop and this time during the installation I gave path http://localhost/sk I was able to see the contents in browser http://localhost/sk which you will see in a normal CD. But beginning installation I got same error ValueError: Could not find an installable distribution at 'http://localhost/sk So I want to just confirm if http install is done only this way or some other way because the installation is not proceeding.

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• Clean URLs for images

  - by Albert

  I'm unable to get a working .htaccess that should accept clean URLs to load images. I mean, for example, if a user type this: http://mysite.com/image/example It works perfectly, as my PHP process and parse it. However, if the user type: .../image/example.jpg It doesn't work. I mean, if a user writes that, I want to load the module with the example.jpg as a parameter, I don't want to load the image at all! Thanks in advance.

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• Lenovo B570 doesn't boot after installation

  - by Alan

  I install my Ubuntu 11.10 64 Bits in my Notebook Lenovo B570. (I remove Win 7). I have no problems to install. But at finish, when it start, it wont boot. It search for another boot device (Network, CD/DVD). Maybe it issue is about SCSI Hard Drive. I try in BIOS set compatible mode SCSI/ATA. It try locate another boot (Networks, CD/DVD). I try to enable compatible mode in BIOS SCSI - SATA and reinstall again. "Will ubuntu be the only os on your computer or is there a 2nd os?" A:Yes. I remove Windows 7 and use All disc to Ubuntu.

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• How return 304 status with FileResult in ASP.NET MVC RC1

  - by Maysam

  As you may know we have got a new ActionResult called FileResult in RC1 version of ASP.NET MVC. Using that, your action methods can return image to browser dynamically. Something like this: public ActionResult DisplayPhoto(int id) { Photo photo = GetPhotoFromDatabase(id); return File(photo.Content, photo.ContentType); } In the HTML code, we can use something like this: <img src="http://mysite.com/controller/DisplayPhoto/657"> Since the image is returned dynamically, we need a way to cache the returned stream so that we don't need to read the image again from database. I guess we can do it with something like this, I'm not sure: Response.StatusCode = 304; This tells the browser that you already have the image in your cache. I just don't know what to return in my action method after setting StatusCode to 304. Should I return null or something?

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• Impossible to install Ubuntu 10.10 dual boot with Windows 7 on new Acer desktop computer

  - by Don Myers

  My brother has a brand new Acer Desktop with Windows 7. I have done many installs (40+) of Ubuntu starting with 8.10, and have never run into this. I've spent three hours trying to do a dual boot install of 10.10. When you get to the place where you normally would choose to install as a dual boot or overwrite the existing information on the hard drive, that block is just blank. Nothing. No choices even to do a manual partition setup. If you try to go on you get the message "No root file system is defined. Please correct this from the partitioning menu." but there is nothing in the partitioning menu. I tried a good 10.04 disc also. Same thing happens with it. I ran a gparted live cd, and it shows the hard drive as sda with 3 partitions on the original. sda1 is a small partition called PQService. sda2 is another small partition called System Reserved, and GParted says it is the boot partition. sda3 is the main partation with the operating system (Windows 7) and all of the empty space. There is a little unallocated space at the very beginning and very end of the hard drive. If I go to places in the Live CD, it shows a 640 gb hard disk called Acer, but it also shows a 640 gb hard disk called system reserved. They are the same disk. There is just one hard drive. If you click properties in the System Reserved 640 gb, it shows all information as unknown. I had to change the boot order in the bios in order to run the live cd. The hard drive instead of being listed as such is listed as Raid:Raid Ready. Something the way this computer is set up is preventing Ubuntu from being able to identify the hard drive partitions at all to do an install, even if you were not doing a dual boot and just wanted to overwrite Windows. Is this a bug that needs reported? This is a major problem for me and my brother, but also for Ubuntu if new users want to Ubuntu and find they cannot install it.

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• Query to show images with recent posts in Wordpress sidebar/widget

  - by Peter

  To show recent items from a Wordpress category in a widget I'm using this code... <ul> <?php $recent = new WP_Query("cat=1231&showposts=5"); while($recent->have_posts()) : $recent->the_post();?> <li><a href="<?php the_permalink() ?>" rel="bookmark"> <?php the_title(); ?> </a></li> <?php endwhile; ?> </ul> ...but how can I make this query also display the first image in each post, and is there any way to set a 'default' image in case there is no image? Is there also a way to use thumbnails here, rather than loading the full size image and using HTML to resize?

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• WPF User Control

  - by Jeevan Bhatt

  how to add image in radio button. Image can be change melodramatically.

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• Android maps out of memory error

  - by SamB09

  Hi , sometimes when running a google maps program with an overlay image i will receive a bit map out of memory error. It always seems to be at a random point in the app. Im not sure how to solve this. Anyone have any ideas ? My overlay code is below , im not sure if you need to see the class its called in though? public class MyOverlay2 extends Overlay { private static final double MAX_TAP_DISTANCE_KM = 3; // Rough approximation - one degree = 50 nautical miles private static final double MAX_TAP_DISTANCE_DEGREES = MAX_TAP_DISTANCE_KM * 0.5399568 * 50; private final GeoPoint gPoint; private final Context cont; private final int draw; // private final int lat; public MyOverlay2(Context cont, GeoPoint gPoint1, int draw) { // constructor will be called in the userLocation class to draw an overly image this.cont = cont; this.gPoint = gPoint1; this.draw = draw; } @Override public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { // constructor takes 3 arguments super.draw(canvas, mapView, shadow); // Convert geo coordinates to screen pixels Point screenPoint = new Point(); mapView.getProjection().toPixels(gPoint, screenPoint); //Read the image from the xml resource using a bitmap factory BitmapFactory.Options options=new BitmapFactory.Options(); options.inSampleSize = 1; Bitmap preview_bitmap=BitmapFactory.decodeResource(cont.getResources(),R.drawable.monday12,options); //draw the image at the location specified by the co-ordinates canvas.drawBitmap(preview_bitmap, screenPoint.x - preview_bitmap.getWidth() /2, screenPoint.y - preview_bitmap.getHeight()/2 , null); // get the images height and width values divided by two draw the image at the specified screen points return true; } @Override public boolean onTap(GeoPoint s, MapView mapView) { // Handle tapping on the overlay here return true; } }

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• how to change the ubuntu logo which appears while booting the ubuntu?

  - by ganapati hegde

  Hi, how can i replace ubuntu logo,(white logo with black background) which comes very first while booting (it also comes while shuting down) in ubuntu 9.10. I am able to replace other images, which comes after this image. I have done it by replaceing my images with the images present in /usr/share/images/xflash.But it is not possible to replace the mentioned image by this way. Where the above mentioned image (white with black bg) will be stored? Thank you for answering...

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• Remove Google background

  - by jack

  How do I remove the Google background image?

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• Qt not displaying PNG images on Linux

  - by ereOn

  Hi, I have a software written using Qt which is meant to work on both Windows and Linux. I use PNG images as icons for my QActions, embedded in a resource. I have the following tree directory: / resources/ icons.qrc image.png Here is the content of icons.qrc: <RCC> <qresource prefix="/resources" lang="fr"> <file alias="image.png">image.png</file> </qresource> </RCC> I declare my QIcon like that: QIcon(":/resources/image.png") Under Windows, it works well but on Linux (I only tried on Ubuntu 10.4 so far), the images aren't displayed. Is there anything special I have to do for this to work ? Is this a configuration problem ? Thank you.

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• How to display data uri scheme into a C# WebBrowser Controler

  - by Emanuel

  How can I show an image base64 encoded using WebBrowser control in C#? I used the following code: <img src="data:image/gif;base64,/9j/4AAQSkZJRgABAgAAZABkAA7AAR R894ADkFkb2JlAGTAAAAAAfbAIQABAMDAwMDBAMDBAYEAwQGBwUEBAUHCAYGBw ... uhWkvoJfQO2z/rf4VpL6CX0Dts/63+FaS+gl9A7bP+tthWkvoJfQODCde4qfcg RiNWK3UyUeX9CXpHU43diOK915X5fG/reux5hUAUBftZ" /> but no image is displayed. One solution would be to save images locally and using absolute path, but this is not desirable. Any idea? Thanks.

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• how to make tooltip move along with mouse?

  - by George2

  Hello everyone, I am using Silverlight 3 + VSTS 2008. I have a image (Multiscale image control) and I place tooltip on this image. The function of Tooltip works fine. Since the image is big (about 500 * 500 size), and since end user could move mouse on the picture, and I want to display tooltip position along with the mouse (i.e. when mouse moves, I want to tooltip move along with the mouse). Currently, the tooltip displays at a fixed position. Here is my current XAML code, any ideas how to solve this issue? <MultiScaleImage x:Name="msi" Height="500" Width="500"> <ToolTipService.ToolTip> <ToolTip Content="Here is a tool tip" Name="DeepZoomToolTip"></ToolTip> </ToolTipService.ToolTip> </MultiScaleImage> thanks in advance, George

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• Can't set anchor tag to [disabled] in IE

  - by Alex

  Hi. I have the following css code. button.png is image where 3 button states are pasted vetrically, so i just move image in css. a.button { background-image: url(button.png); background-position: 0px 0px; width: 100px; height: 30px; display: block; background-repeat: no-repeat; text-indent: -9999px; } a:hover.button { background-position: -100px 0px; } a.button[disabled] { background-position: -200px 0px; cursor:default; } I put this in html <a href="#" class="button" disabled="disabled"></a> In Chrome all is ok. IE dont show disabled image.

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• UITableViewCellStyleDefault label width

  - by Rob Bonner

  Hello all, I am getting some odd behavior from stock table cells, or maybe not odd, maybe I am making some assumptions. I create the cells as follows: cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; Then I assign an image to the default imageView property. My image usually comes in from a user, so it might be larger than the default size. To take care of this I: [cell.imageView setContentMode:UIViewContentModeScaleAspectFit]; which I expected to scale the image for me within the control, but in reality, the images are all over the map. So, is there a proper way to constrain the image in stock cell types? Thanks in advance!

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• drag and drop with jquery and php

  - by robertdd

  hy, i have a php array with the name of some images! i list all the images use this: $files = $_SESSION['files']; $imgid = $_POST['id']; if ($files){ foreach($files as $image ): print '<li id="liupimages">'."\n"; print '<a href="uploads/'.$image.'"><img id="'.$imgid.'" alt="'.$image.'" src="uploads/'.$image.'"></a>'."\n"; print "</li>\n"; endforeach; print <<<JS <script> $(".thumbs li a").click(function(){ var largePath = $(this).attr("href"); $('.thumbs li').removeClass('thumbac'); $(this).parent().addClass('thumbac'); $("#largeImg").hide() .attr({ src: largePath }) .load(function() { $(this).show(); }); return false; }); </script> JS; } i use jquery-ui to drag and drop images using this function: $(function() { $("#upimagesQueue").sortable({ opacity: 0.6, cursor: 'move', update: function() { //?? } }); }); after i drag and drop one image i want to be able to update the php array to! how to do this?

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• Any good source of explanatory documentation on ColorMatrix?

  - by mackenir

  I'd like to try using ColorMatrix, but am only able to find examples that convert an image to grayscale. And even then, they tend to be presented as a chunk of 'magic numbers' code with no explanation. Does anyone know of a 'tutorial' on how to use ColorMatrix? For example I'd be interested in converting a grayscale image to a color image, where white == transparent, and black = a solid color, with gray pixels somewhere in between. Could ColorMatrix do that?

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• "Unable to install initrd-tools" error during installation.

  - by Rahul

  Was trying to install Ubuntu from a CD on a machine which already has windows on it, choose the option of "Resize IDE1 master (hda) and use freed space" during the "Install the base system" step. After that i get the error: Unable to install initrd-tools. An error was returned while trying to install the initrd-tools package into the target system. Check /target/var/log/bootstrap.log for details. The problem is one one hand i cannot proceed with the complete installation and on other hand if i remove the CD, am not able to boot windows as it says No bootable device. Would highly appreciate for any recommendations.

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• How to get windows back? Lubuntu?

  - by Jon

  I installed lubuntu and I don't like it. I did a clean install to lubuntu rather than making it dual. Now when I want to go back to Windows it won't work. I put the Windows Vista CD in and it won't load. It just loads lubuntu back. I know for a fact that the CD works just fine. I don't know what to do? I did a little research and it says I deleted the windows loader or the partition. Can someone help me?

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• css block links and images

  - by Andrew Heath

  Given this html: <div class="nation"> <a href="library.php?type=nation&amp;id=America"> <div class="nation-image"> <img src="nations/America.png" alt="snip" /> </div> <h3>America</h3> </a> </div> the following CSS results in the entire <div class="nation"> becoming a clickable block link: .nation {float: left; text-align: center; width: 189px;} .nation img {width: 160px; margin: 10px 0 0 0; border: 1px solid #16160C;} but if I make the following single addition: .nation {float: left; text-align: center; width: 189px;} .nation-image {height: 138px;} .nation img {width: 160px; margin: 10px 0 0 0; border: 1px solid #16160C;} to specify the height of <div class="nation-image"> then the image (and only the image) is no longer a link, but the rest of the div (margin around it, h3 etc) remain a block link... /I am teh confussd :-?

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• help with eclipse debugging /or/ subclassed SimpleAdapter not calling setViewImage()

  - by edzillion

  Hi I was following the method for asynchronously loading images into a listview as outlined in evan charlton's blog here. The problem I am having is that the setViewImage function is not being called by the system: @Override public void setViewImage(final ImageView image, final String value) { if (value != null && value.length() > 0 && image instanceof RemoteImageView) { RemoteImageView riv = (RemoteImageView) image; riv.setLocalURI(API.getCacheFileName(value)); riv.setRemoteURI(value); super.setViewImage(image, R.drawable.icon); } else { image.setVisibility(View.GONE); } } I have built his example code, and setViewImage is called fine - it seems to me that the code is functionally identical. Looking into the docs it says: First, if a SimpleAdapter.ViewBinder is available, setViewValue(android.view.View, Object, String) is invoked. If the returned value is true, binding has occured. If the returned value is false and the view to bind is a TextView, setViewText(TextView, String) is invoked. If the returned value is false and the view to bind is an ImageView, setViewImage(ImageView, int) or setViewImage(ImageView, String) is invoked. If no appropriate binding can be found, an IllegalStateException is thrown. I don't really understand how to debug (in eclipse) to find out how this process is occuring, advice on how to do so would be a help. Thanks.

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• Failed 12.04 installation

  - by Rob Sayer

  I tried installing Ubuntu 12.04 today. Not an upgrade, a new installation. It didn't work. My computer specs: Computer: Compaq presario CQ-104CA OS: Windows 7 Home 64 bit CPU: AMD V140 BIOS: latest Graphics: amd m880g with ati mobility radeon hd 4250 Wireless: atheros ar9285 Internal HD:SATA I wasn't connected to the internet at the time ... I know of a number of people who have installed ubuntu unconnected and just updated later. It seemed to go normally until I got to the part where I chose to install dual boot linux/windows. Then, the screen went black and the following test appeared (I left out the [OK]'s): checking battery state starting crash report submission daemon stating cpu interrupts balancing daemon stopping system V runlevel compatibility starting configure network device security stopping configure network device security stopping cold plug devices stopping log initial device creation starting enable remaining boot-time encrypting devices starting configure network device security starting save udev log and update rules stopping save udev log and update rules stopping enable remaining boot-time encrypted block devices checking for running unattended-upgrades acpid: exiting speech-dispatcher disabled: edit /etc/default/speech-disorder At this point, the CD is ejected. Then nothing. If I press the return key, it boots Windows. I don't think that's what's supposed to happen. Thinking the cd media or dvd drive may have been faulty, I downloaded the .iso again and made a bootable USB stick, as per your instructions. This time there was no cryptic crash screen. It just booted windows. I can't find any log files it may have left. Thinking the amd64 version may have been the wrong one, I tried downloading the x86 version. Same thing, both from cd and usb drive. Note I downloaded both files twice. I doubt it was a corrupted d/l. This is supposed to be a simple, transparent install. I went to the time and trouble of looking up my devices and drivers re ubuntu beforehand, and was prepared to do some configuration, though I know someone who has the same wireless device and his worked righted out of the box. But I spent over 3 hours trying to install it with only the above to show for it.

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