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• Checkbox show error.

  - by Kyle Sevenoaks

  Hi, I need to make this show an error if the user tries to leave the page without checking this tickbox. It has no other use other than visual, is there a way to implement such a thing? <span> <input value="1" type="checkbox" name="salgsvilkar" ID="checkbox2" style="float:left;" onclick="document.getElementById('scrollwrap').style.cssText=' border-color:#85c222; background-color:#E5F7C7;';" /> <label for="checkbox2" class="akslabel"> Salgs og leveringsvilkår er lest og akseptert </label> </span> CSS is just for styling. Thanks.

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• Core Data table record count

  - by user339633

  I have an entity called Person and it has a relationship called participatingGames, to another entity called GameParticipant. I (apparently) can retrieve the number of matches in the GameParticipant entity using this simple code in the Person object I created from the entity in the model: [self.participatingGames count]; However, I'd just like to retrieve the number of Person records and one might guess the syntax for this is just as simple. I have lots of books including those by Jeff LaMarche, but those sources and what I find around here make me wonder if I need to set up a fetchedResultsController just to know the count of some entity. My background is in SQL, so of course it seems odd that what would take 15 seconds to code in any other environment seems like such a well-guarded secret in Core Data. I'm using iPhone SDK 3.1.4 under OSX 10.5.8 Suggestions?

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• Looking for an easy way to get started with tesseract (wrapper, sample project or tutorial)

  - by pinouchon

  I come from a web development background, and I am new to the world of OCR. After comparing a few OCR libraries, the one that yielded the best results was Tesseract. I would like to make an application that takes screenshots and perform OCR on those using Tesseract. Ideally, it would be in Java or C#, but I can also do it in C++ or Python if needed. What is the easiest way to get started with this library ? I am looking for a detailed tutorial or a sample project that uses tesseract.

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• Best practice for error handling in an Android Service

  - by Omar Kohl

  I have an Android Service that does some background processing on an image using a separate Thread. If an error occurs in this Service or even worse in the thread, what is the best practice to inform the launching Activity of the problem and allow the application to recover to a stable state (i.e. the state it was in before launching the service). From within the Service I could post a Toast or a Notification, but that doesn't help me. I would like to inform the user about the problem but at the same time recover the application to a stable state.

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• Syncronize an SVN repo (svnsync) with encoding errors

  - by Hamish

  Is it possible to fix/bypass non-UTF8 encoded svn:log records when syncronizing repositories with svnsync? Background I'm in the process of taking over the maintenance of an open source module that is stored within a large (well over 10,000 revisions) subversion (1.5.5) repository. I do not have admin access to the remote repository to dump/filter/load the module. The old repository is being discontinued and I am trying to sync the original sub module to my local (1.6+) repository with svnsync. For example: svnsync file://home/svn/temp-repo/ http://path.to.repo/modulename/ The problem is that the old repository didn't enforce UTF8 encoding and I'm hitting errors like: svnsync: Cannot accept 'svn:log' property because it is not encoded in UTF-8 I can't modify the log property in the source repository so I need to somehow modify or ignore the property value when the encoding is unknown/invalid. Any ideas? For example, is it possible to write a pre-revprop-change script to modify the log property in transit?

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• Rectangular BackColor of selection in RichTextBox

  - by AgentConundrum

  Background: I'm going to start studying/coding at the local university's library. Since I'm not a student, I won't be able to utilize their wireless internet access. Since StackOverflow is such a great resource, I want to be able to take it with me, so I'm building a small desktop application to load/search/display the most recent data dumps. Problem: I want to display code blocks in the same sort of rectangular block as this site does, so I played with the RichTextBox control to try to create this effect. Unfortunately, the RichTextBox.SelectedBackColor property only colors the actual text, when what I want is a rectangle reaching to the outer limits of the selection. Example: This is what I am able to produce with the RichTextBox: This is what I would like to create: Questions: Is there any way to produce this effect using the RichTextBox? If not, are there any other controls I could use to create this effect?

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• disable text drag and drop

  - by maniek

  There is a common feature of modern browsers where a user can select some text and drag it to an input field. Within the same field it causes moving of text, between different fields it does copying. How do I disable that? If there is no portable way, I am mostly interested in firefox. This is an intranet webapp, so I am also interested in modifying the browser/getting a plugin to do this. Maybe some system-level settings (I`m on windows XP)? I need to keep the default select-copy-paste functionality. The background is I have multiple-field data entry forms, and users often drag something by mistake.

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• Changing Image In a Button After Being Clicked?

  - by BuZzZzJaY

  Creating a game in Android using multiple Buttons to display an image from the drawable folder. I want to change the button to a different image after the button has been clicked on. Here is the button code: <Button android:id="@+id/b36" android:background="@drawable/black" android:layout_width="45px" android:layout_height="45px" /> I can't find anything about how to change the actual image of the button. You can change the color of the button by using the following code in the java file: b36.setBackgroundColor(0xAA00AA00);

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• TStringGrid with BOTH editing AND range selection?

  - by Kevin Killion

  Question: Can anyone point to an article or code samples anywhere on how to provide BOTH editing AND range selection in a TStringGrid? Yes, I KNOW there are third-party grids that do this, but it's frustrating that the built-in grid lacks this basic capability. Background: It's pretty normal to expect to be able to both edit a cell in a grid, and also to select a range of cells such as for a Copy operation. As delivered, TStringGrid doesn't do that. It's either/or. In fact, the docs tell us about the grid Options, "When goEditing is included in Options, goRangeSelect has no effect". However, it looks like it may be possible to do editing and rangeselects in a TStringGrid anyway!!! Through careful use of the mousedown, mouseup, selectcell and exit events, you can get dang close by switching editing elements on and off at the right times. But I still don't have it perfect, and that only covers mouse use, not keyboard changes.

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• How do I read the cache of Chrome and Firefox programmatically on the Mac?

  - by John Gallagher

  Background I want to access the cache of Chrome and Firefox in my Cocoa application. I need to get the HTML for pages accessed recently. Safari is a piece of cake - all this information is available in SQLite data stores, but not so in Chrome and Firefox. The Problem For Firefox, the cache is in /Library/Caches/Firefox/Profiles/xxx.default/Cache with filenames _CACHE_001_ _CACHE_002_ _CACHE_003_ and _CACHE_MAP_ For Chrome, the cache is in /Library/Caches/Google/Chrome/Default/Cache with filenames data_0 data_1 data_2 and data_3 What I've tried The only article I can find that sheds any light on what format these caches are in is here. It recommends a Cache Viewer tool, but doesn't explain how one might do this programmatically. Questions Is there any way of reconstructing this data using command line tools or the Cocoa framework? Or is it much too low level? Is there another way of getting at the HTML of recent web pages that I don't know about?

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• Emacs/xterm color annoyance on Linux

  - by tgamblin

  I'm using emacs in a console window both on my local Linux box and on the login node of a remote cluster. I use emacs regularly, and I've got the foreground color set to white in my .emacs file like so: (set-foreground-color "white") (set-background-color "black") However, when I run emacs, the foreground isn't white; it's grey and very hard to read. On my Mac, emacs in a console window with the same settings shows up as proper white. But on both linux boxes, in konsole and xterm, it's grey. In case it matters, I've got TERM set to xterm-color, the desktop is running RHEL 5, and the cluster node is running RHEL 4 (CentOS). Is this some default with how Linux sets up terminal colors? How do I get white to be white? Note: this is with console emacs, not emacs under X. That's emacs -nw if you have DISPLAY set.

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• What is the most efficient way to find missing semicolons in VS with C++?

  - by Dr. Monkey

  What are the best strategies for finding that missing semicolon that's causing the error? Are there automated tools that might help. I'm currently using Visual Studio 2008, but general strategies for any environment would be interesting and more broadly useful. Background: Presently I have a particularly elusive missing semicolon (or brace) in a C++ program that is causing a C2143 error. My header file dependencies are fairly straightforward, but still I can't seem to find the problem. Rather than post my code and play Where's Wally (or Waldo, depending on where you're from) I thought it would be more useful to get some good strategies that can be applied in this and similar situations. As a side-question: the C2143 error is showing up in the first line of the first method declaration (i.e. the method's return type) in a .cpp file that includes only its associated .h file. Would anything other than semicolons or braces lead to this behaviour?

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• What is the method of choice to adjust CSS changes in vaadin?

  - by Karussell

  I am struggling with some minor layout changes in vaadin which has to be done on Java AND Css side. Everytime I need to adjust a layout thing like padding-top, background color or bold text of one component I need to set the style via Java code too: userLink.setStyleName("textbold"); The changes in my styles.css (under VAADIN/themes/app/) would then be: @import "../runo/styles.css"; .textbold { font-weight: bold; } ... Is this the correct way of changing the CSS or is there another way? Can I do this without affecting the Java code?

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• image in div doesn't display anything

  - by fusion

  i'm trying to insert an image in a div container using css and html, but it doesn't display any image. html code: <div id="wrapper"> <div id="quoteContainer"> <span class="start_img"></span> </div> </div> css: .start_img { background: url(image/img1.png); border: dotted 2px black; width:200px; height:20px; } apart from the img, not even the border shows. i tried using the <img> tag in html to insert the image inside the div, that doesn't work either. is there anything wrong with the code?

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• How can I use the same buildscript for Flash Builder 4 and Ant/Mvn?

  - by David Laing

  I'm setting up a build system for a Flash Builder 4 (Flex 4) based project; and I'm struggling to get a setup that compiles in the IDE the same as it does from the command line on the build server. I come from a C# background; and my expectation is that I'll be able to create a "solution" with a collection of "projects" that I can compile from the IDE, or from the command line on the build server. The best I've managed sofar is 2 separate build "scripts", a custom ant script for the build server, and the default Flash Builder IDE config based on a workspace; but this is making my DRY daemons jump around in fury. Please can someone point me in the right direction :)

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• Why does bold monoface shift vertically on Windows?

  - by Aaron Digulla

  In Firefox 3.6, IE7 and Opera 10 on Windows, this HTML has an odd behavior: <html><head></head> <style> span { font-family: monospace; background-color: green; } span.b { font-weight: bold; } </style> <body> <span>Text</span><span class="b">Text</span><span>Text</span> </body> </html> The bold span in the middle is shifted down by one pixel. That doesn't happen for other fonts. Why is that? How can I fix it?

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• What's the best way to convert a .eps (CMYK) to a .jpg (RGB) with Image Magick

  - by Slinky

  Hi All, I have a bunch of .eps files (CMYK) that I need to convert to .jpg (RGB) files. The following command sometimes gives me under or over saturated .jpg images, when compared to the source EPS file: $cmd = "convert -density 300 -quality 100% -colorspace RGB ".$epsURL." -flatten -strip ".$convertedURL; Is there a smarter way to do this such that the converted image will have the same qualities as the source EPS file? Here is an example of the source file info: Image: rejm.eps Format: PS (PostScript) Class: DirectClass Geometry: 537x471 Base geometry: 1074x941 Type: ColorSeparation Endianess: Undefined Colorspace: CMYK Channel depth: Cyan: 8-bit Magenta: 8-bit Yellow: 8-bit Black: 8-bit Channel statistics: Cyan: Min: 0 (0) Max: 255 (1) Mean: 161.913 (0.634955) Standard deviation: 72.8257 (0.285591) Magenta: Min: 0 (0) Max: 255 (1) Mean: 184.261 (0.722591) Standard deviation: 75.7933 (0.297229) Yellow: Min: 0 (0) Max: 255 (1) Mean: 70.6607 (0.277101) Standard deviation: 39.8677 (0.156344) Black: Min: 0 (0) Max: 195 (0.764706) Mean: 34.4382 (0.135052) Standard deviation: 38.1863 (0.14975) Total ink density: 292% Colors: 210489 Rendering intent: Undefined Resolution: 28.35x28.35 Units: PixelsPerCentimeter Filesize: 997.727kb Interlace: None Background color: white Border color: #DFDFDFDFDFDF Matte color: grey74 Page geometry: 537x471+0+0 Dispose: Undefined Iterations: 0 Compression: Undefined Orientation: Undefined Signature: 8ea00688cb5ae496812125e8a5aea40b0f0e69c9b49b2dc4eb028b22f76f2964 Profile-iptc: 19738 bytes Thanks

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• bash: hwo to know NUM option in grep -A -B "on the fly" ?

  - by Michael Mao

  Hello everyone: I am trying to analyze my agent results from a collection of 20 txt files here. If you wonder about the background info, please go see my page, what I am doing here is just one step. Basically I would like to take only my agent's result out of the messy context, so I've got this command for a single file: cat run15.txt | grep -A 50 -E '^Agent Name: agent10479475' | grep -B 50 '^==' This means : after the regex match, continue forward by 50 lines, stop, then match a line separator starts with "==", go back by 50 lines, if possible (This would certainly clash the very first line). This approach depends on the fact that the hard-coded line number counter 50, would be just fine to get exactly one line separator. And this would not work if I do the following code: cat run*.txt | grep -A 50 -E '^Agent Name: agent10479475' | grep -B 50 '^==' The output would be a mess... My question is: how to make sure grep knows exactly when to stop going forward, and when to stop getting backward? Any suggestion or hint is much appreciated.

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• Java2D: Fill a convex rounded polygon (QuadCurves)

  - by Martijn Courteaux

  Hi, If I have a QuadCurve like this (+ = node): + + \ ./ +--?? And I fill it in Java 2D the result is something like this: (x = colored) +xxxxxxxxx+ \xxxxxx./ +--?? But I want to color the other side: + + x\ ./x xxx +--??xx xxxxxxxxxxx This succeeds by drawing a rectangle around the curve in the color I want to color the other side and then fill the curve with the background color. But this isn't good enough to fill a convex rounded (based on QuadCurves) polygon. In case of some coordinates for the rectangles (as explained in the trick I used) overlap other pieces of the polygon. Here are two images (the green area is my polygon): So, the question is simple: "How can I color a shape build of curves?" But to the answer will not be simple I think... Any advice would be VERY VERY appreciated. Thanks in advance. Maybe I'm going to make a bounty for this question if I don't get an answer

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• What should be the image resolution for Nexus One or Droid?

  - by sunil

  Hi, As Android supports multiple devices from different manufacturers there are different screen resolutions supported. The table that is available at http://developer.android.com/intl/fr/guide/practices/screens_support.... is not very clear to me. It shows WVGA and FWVGA in MDPI for Large Screens and HDPI for Normal screens. So, if the image is kept in drawable-mdpi and its resolution is 320 * 480 then which image will be taken by Large Screens device of MDPI. Moreover, there are two screen resolutions for HDPI i.e. 480 * 800 and 480 * 854. So, with what screen resolution the image should be built. I want to place the background image which looks distorted in WVGA emulator since its resolution is 320 * 480. I have read about nine patchable images but I think they are better for button images and edittext images so that they can stretch according to the data in it. Can someone please guide me in this? Regards Sunil

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• How can I extend a LinkButton to allow HTML text in Flex?

  - by John Isaacks

  I am feeding the label to my LinkButton directly from a string I receive from a Google API that puts html to format the label. I want to extend linkbutton to allow this. I wrote a class myself to allow html text for the label and that aspect of it works but now the background that appears when you hover is way too big. I tried to override measure() to fix this but I didn't have a clue how. Here is the class I wrote: package com.kranichs.components { import mx.controls.LinkButton; public class HTMLLinkButton extends LinkButton { protected var _isHTML:Boolean; public function HTMLLinkButton() { super(); } [Bindable] public function set isHTML(value:Boolean):void { _isHTML = value; } public function get isHTML():Boolean { return _isHTML; } override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { super.updateDisplayList(unscaledWidth, unscaledHeight); if(_isHTML) { textField.htmlText = label; } } } }

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• Parallel Assignment operator in Ruby

  - by Bragaadeesh

  Hi, I was going through an example from Programming in Ruby book. This is that example def fib_up_to(max) i1, i2 = 1, 1 # parallel assignment (i1 = 1 and i2 = 1) while i1 <= max yield i1 i1, i2 = i2, i1+i2 end end fib_up_to(100) {|f| print f, " " } The above program simply prints the fibonacci numbers upto 100. Thats fine. My question here is when i replace the parallel assignment with something like this, i1 = i2 i2 = i1+i2 I am not getting the desired output. My question here is, is it advisable to use parallel assignments? (I come from Java background and it feels really wierd to see this type of assignment) One more doubt is : Is parallel assignment an operator?? Thanks

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• Extremely basic PHP and Mysql

  - by fighella

  Background: I am more of a designer than a programmer, but have hacked templates for many open source CMS's (Drupal, Joomla, Wordpress) I want to start from scratch in regards to the relations of php and a mysql database. Lets assume I have a working database and php engine locally. What would be my first step to connecting to my database and creating a table... (im happy to be led to an appropriate tutorial...) Many of the tutorials I have seen start with basic php, but I would rather explore the connection between the db and the php.

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• Why am I getting two section headers on this grouped table?

  - by Andy

  I'm sure this is some easy-to-fix issue that I've missed, but I can't figure it out. I've got a grouped table view with 3 sections. I'm using the following code to generate section headers: -(NSString*)tableView:(UITableView*)tableView titleForHeaderInSection:(NSInteger)section { if (section == 0) { NSString *header = @"Header 1"; return header; } if (section == 1) { NSString *header = @"Header 2"; return header; } else { NSString *header = @"Header 3"; return header; } } When my table is displayed, there are two headers for each section - one with white text on a gray bar that stretches across the screen (like the letter separators in the Contacts app), and one in gray text on the table background (which is the one I want). Both headers have identical text. Where is the first header coming from?

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• Alternative approach to OpenGL View on top of Camera

  - by Mr. Roland

  Hi, the traditional way of doing a camera preview background with OpenGL on the front is to take two SurfaceViews(one for the camera another for OpenGL) and stack them on top of each other. The problem is that stacking SurfaceViews is discouraged: http://groups.google.com/group/android-developers/browse_thread/thread/4850fe5c314a3dc6 So what alternatives are there? I was considering the following: Subclass GlSurfaceView, and then call set the Camera preview onto the holder of this subclass: Camera.setPreviewDisplay(mHolder); Don't use GLSurfaceView, instead create your own SurfaceView subclass where you display the Camera preview onto the holder and also draw your openGL. This would require to use OpenGL without GLSurfaceView, has anyone done this before? I'm not sure if this even is possible or makes sense, since it implies displaying the camera preview onto the holder of the surface and at the same time drawing OpenGL on the same surface. Is there any other sensible alternative to solving the problem without using two SurfaceViews? Thanks!

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