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• Bundler doesn't want to install hpricot on Windows XP with Ruby 1.8.7

  - by Nick Gorbikoff

  Hello I develop on a Windows machine but deploy to Debian. Trying to use hpricot with Rails 3 app. I can get the gem to install using : gem install hpricot --platform=mswin32 But when I do this in the bundle file - it keeps throwing an error (I think it's trying to install the wrong version of hpricot (not windows specific) group :production do gem "hpricot", "0.8.3" end group :development, :test do gem "hpricot", "0.8.3", :platforms => [:mswin, :mingw] end This is from another question here on stackoverflow - but it's not working for me. Any ideas? P.S.: Windows XP sp3 with Ruby 1.8.7 with Rails 3.0.3 with bundler 1.0.7 EDIT Forgot to paste my error: bundle install Fetching source index for http://rubygems.org/ which: no sudo in (.;C:\Program Files\ImageMagick-6.6.5-Q16;C:\ruby\Ruby187\bin;C:\Program Files\ActiveState Komodo Edit 6\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\e\cmd;C:\Program Files\MySQL\MySQL Server 5.1\bin;C:\WINDOWS\system32\WindowsPowerShell\v1.0;c:\tools;C:\gnuwin32\bin;C:\tools\wkhtmltopdf;C:\Python31;C:\Program Files\TortoiseHg\;C:\Program Files\TortoiseGit\bin; c:\program files\videolan\vlc;C:\Program Files\SMPlayer\mplayer;C:\Program Files\Git\cmd;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Calibre2\;c:\ruby\jruby-1.5.5\bin;C:\Program Files\Common Files\Shoes\0.r1514\..) Using rake (0.8.7) Using abstract (1.0.0) Using activesupport (3.0.3) Using builder (2.1.2) Using i18n (0.4.2) Using activemodel (3.0.3) Using erubis (2.6.6) Using rack (1.2.1) Using rack-mount (0.6.13) Using rack-test (0.5.6) Using tzinfo (0.3.23) Using actionpack (3.0.3) Using mime-types (1.16) Using polyglot (0.3.1) Using treetop (1.4.9) Using mail (2.2.10) Using actionmailer (3.0.3) Using arel (2.0.4) Using activerecord (3.0.3) Using activeresource (3.0.3) Using bcrypt-ruby (2.1.4) Using bundler (1.0.7) Using cancan (1.5.0) Using haml (3.0.24) Using compass (0.10.6) Using warden (1.0.3) Using devise (1.1.5) Installing hpricot (0.8.3) Temporarily enhancing PATH to include DevKit... with native extensions C:/ruby/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) C:/ruby/Ruby187/bin/ruby.exe extconf.rb checking for stdio.h... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=C:/ruby/Ruby187/bin/ruby Gem files will remain installed in C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/hpricot-0.8.3 for inspection. Results logged to C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/hpricot-0.8.3/ext/fast_xs/gem_make.out from C:/ruby/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `each' from C:/ruby/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `build_extensions' from C:/ruby/Ruby187/lib/ruby/site_ruby/1.8/rubygems/installer.rb:198:in `install' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/source.rb:95:in `install' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:55:in `run' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:44:in `run' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:8:in `install' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/cli.rb:225:in `install' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `send' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `run' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor.rb:246:in `dispatch' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/base.rb:389:in `start' from C:/ruby/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.7/bin/bundle:13 from C:/ruby/Ruby187/bin/bundle:19:in `load' from C:/ruby/Ruby187/bin/bundle:19

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• for my project I have problem in report

  - by pink rose

  public class stack { private int Array[]; private int top = -1; public int size; public stack(int size) { this.size=size; Array = new int[size]; } public void push(int j) { if (top < size) { Array[++top] = j; } } public int pop() { return Array[top--]; } public int top() { return Array[top]; } public boolean isEmpty() { return (top == -1); } } import javax.swing.JOptionPane; public class menu { private static stack s; private static int numbers[]; public static void main(String args[]) { start(); } public static void start() { int i = Integer.parseInt(JOptionPane.showInputDialog("1. size of array\n2. data entry\n3. display content\n4. exit")); switch (i) { case 1: setSize(); break; case 2: addElement(); break; case 3: showElements(); break; case 4: exit(); } } public static void setSize() { int size = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Size")); s = new stack(size); numbers = new int[10]; start(); } public static void addElement() { for(int x=0;x<s.size;x++) { int e = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Element")); numbers[e]++; s.push(e); } start(); } public static void showElements() { String result = ""; int temp; while (!s.isEmpty()) { temp = s.pop(); if (numbers[temp] == 1) { result = temp+result; } } JOptionPane.showMessageDialog(null, result); start(); } public static void exit() { System.exit(0); } } This my project I was finished but I have problem in question in my report Conclusion. It should summarize the state of your project and indicate which part of your project is working and which part is not working or with limitations. You may also provide your suggestions and comments to this project what I can answer I didn't have any idea

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• for my project I have problem in report

  - by pink rose

  public stack(int size) { this.size=size; Array = new int[size]; } public void push(int j) { if (top < size) { Array[++top] = j; } } public int pop() { return Array[top--]; } public int top() { return Array[top]; } public boolean isEmpty() { return (top == -1); } } import javax.swing.JOptionPane; public class menu { private static stack s; private static int numbers[]; public static void main(String args[]) { start(); } public static void start() { int i = Integer.parseInt(JOptionPane.showInputDialog("1. size of array\n2. data entry\n3. display content\n4. exit")); switch (i) { case 1: setSize(); break; case 2: addElement(); break; case 3: showElements(); break; case 4: exit(); } } public static void setSize() { int size = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Size")); s = new stack(size); numbers = new int[10]; start(); } public static void addElement() { for(int x=0;x<s.size;x++) { int e = Integer.parseInt(JOptionPane.showInputDialog("Please Enter The Element")); numbers[e]++; s.push(e); } start(); } public static void showElements() { String result = ""; int temp; while (!s.isEmpty()) { temp = s.pop(); if (numbers[temp] == 1) { result = temp+result; } } JOptionPane.showMessageDialog(null, result); start(); } public static void exit() { System.exit(0); } } This my project I was finished but I have problem in question in my report Conclusion. It should summarize the state of your project and indicate which part of your project is working and which part is not working or with limitations. You may also provide your suggestions and comments to this project what I can answer I didn't have any idea

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• Save gcc compile status to a text file for Java

  - by JohnBore

  I'm making a C Assessment Program through Java, which has a bunch of programming questions for C, and it lets the user input an answer in the form of C code, and then press a "Compile" button, which is linked to a bat file that runs the user input code through gcc. I've got the input and compiling working, but I need to get the output from the compiler and get that to print textarea within the program. I can get a simple "Hello, world" compiling, but I'm having trouble getting programs that require a user input with scanf, for example, to be printed. else if(e.getSource().equals(compile)){ if(questionNumber<1){ JOptionPane.showMessageDialog(programFrame, "Please start the assessment", "Compile Error", JOptionPane.ERROR_MESSAGE); } else{ FileOutputStream fileWrite; try { fileWrite = new FileOutputStream("demo/demo.c"); new PrintStream(fileWrite).println(input.getText());//saves what the user has entered in to a C source file fileWrite.close(); @SuppressWarnings("unused") Process process = Runtime.getRuntime().exec("cmd /c compile.bat");//runs the batch file to compile the source file compileCode(); try{ fileStream = new FileInputStream("demo/output.txt"); inputStream = new DataInputStream(fileStream); bufferRead = new BufferedReader(new InputStreamReader(inputStream)); while((stringLine = bufferRead.readLine())!=null){ compiled.append(stringLine); compiled.append("\n"); } inputStream.close(); } catch(IOException exc){ System.err.println("Unable to read file"); System.exit(-1); } } catch (IOException exc) { JOptionPane.showMessageDialog(programFrame, "Demo file not found", "File Error", JOptionPane.ERROR_MESSAGE); } } This is the actionPerformed method for the "Compile" button, the compileCode() is the JFrame that displays the output and "compiled" is the textArea for the output. My batch file is: C: cd dev-cpp\bin gcc.exe H:\workspace\QuestionProgram\demo\demo.c -o demo > H:\workspace\QuestionProgram\demo\compilestatus.txt demo > H:\workspace\QuestionProgram\demo\output.txt I'm not sure how I can do it, so the frame is created for the output of the code if the code requires a user input as the command prompt doesn't open without adding "START" to .exec(), but then the frame appears before the program has finished running. Also, how would I get the output of the compiler if the compile fails because of an error? The way I've got it in my batch file at the moment doesn't put anything in a text file if it fails.

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• Tactics for using PHP in a high-load site

  - by Ross

  Before you answer this I have never developed anything popular enough to attain high server loads. Treat me as (sigh) an alien that has just landed on the planet, albeit one that knows PHP and a few optimisation techniques. I'm developing a tool in PHP that could attain quite a lot of users, if it works out right. However while I'm fully capable of developing the program I'm pretty much clueless when it comes to making something that can deal with huge traffic. So here's a few questions on it (feel free to turn this question into a resource thread as well). Databases At the moment I plan to use the MySQLi features in PHP5. However how should I setup the databases in relation to users and content? Do I actually need multiple databases? At the moment everything's jumbled into one database - although I've been considering spreading user data to one, actual content to another and finally core site content (template masters etc.) to another. My reasoning behind this is that sending queries to different databases will ease up the load on them as one database = 3 load sources. Also would this still be effective if they were all on the same server? Caching I have a template system that is used to build the pages and swap out variables. Master templates are stored in the database and each time a template is called it's cached copy (a html document) is called. At the moment I have two types of variable in these templates - a static var and a dynamic var. Static vars are usually things like page names, the name of the site - things that don't change often; dynamic vars are things that change on each page load. My question on this: Say I have comments on different articles. Which is a better solution: store the simple comment template and render comments (from a DB call) each time the page is loaded or store a cached copy of the comments page as a html page - each time a comment is added/edited/deleted the page is recached. Finally Does anyone have any tips/pointers for running a high load site on PHP. I'm pretty sure it's a workable language to use - Facebook and Yahoo! give it great precedence - but are there any experiences I should watch out for? Thanks, Ross

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• Does writing data to server using Java URL class require response from server?

  - by gigadot

  I am trying to upload files using Java URL class and I have found a previous question on stack-overflow which explains very well about the details, so I try to follow it. And below is my code adopted from the sniplet given in the answer. My problem is that if I don't make a call to one of connection.getResponseCode() or connection.getInputStream() or connection.getResponseMessage() or anything which is related to reponse from the server, the request will never be sent to server. Why do I need to do this? Or is there any way to write the data without getting the response? P.S. I have developed a server-side uploading servlet which accepts multipart/form-data and save it to files using FileUpload. It is stable and definitely working without any problem so this is not where my problem is generated. import java.io.Closeable; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.net.HttpURLConnection; import java.net.URL; import org.apache.commons.io.IOUtils; public class URLUploader { public static void closeQuietly(Closeable... objs) { for (Closeable closeable : objs) { IOUtils.closeQuietly(closeable); } } public static void main(String[] args) throws IOException { File textFile = new File("D:\\file.zip"); String boundary = Long.toHexString(System.currentTimeMillis()); // Just generate some unique random value. HttpURLConnection connection = (HttpURLConnection) new URL("http://localhost:8080/upslet/upload").openConnection(); connection.setDoOutput(true); connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); OutputStream output = output = connection.getOutputStream(); PrintWriter writer = writer = new PrintWriter(output, true); // Send text file. writer.println("--" + boundary); writer.println("Content-Disposition: form-data; name=\"file1\"; filename=\"" + textFile.getName() + "\""); writer.println("Content-Type: application/octet-stream"); FileInputStream fin = new FileInputStream(textFile); writer.println(); IOUtils.copy(fin, output); writer.println(); // End of multipart/form-data. writer.println("--" + boundary + "--"); output.flush(); closeQuietly(fin, writer, output); // Above request will never be sent if .getInputStream() or .getResponseCode() or .getResponseMessage() does not get called. connection.getResponseCode(); } }

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• What git branching models actually work - the final question

  - by UncleCJ

  In our company we have successfully deployed git and we are currently using a simple trunk/release/hotfixes branching model. However, this has it's problems, I have some key issues of confusion in the community which would be awesome to have answered here. Maybe my hopes for an Alexander stroke are too great, quite possibly I'll decompose this question into more manageable issues, but here's my first shot. Workflows / branching models - below are the three main descriptions of this I have seen, but they are partially contradicting each other or don't go far enough to sort out the subsequent issues we've run into (as described below). Thus our team so far defaults to not so great solutions. Are you doing something better? gitworkflows(7) Manual Page (nvie) A successful Git branching model (reinh) A Git Workflow for Agile Teams Merging vs rebasing (tangled vs sequential history) - the bids on this are as confusing as it gets. Should one pull --rebase or wait with merging back to the mainline until your task is finished? Personally I lean towards merging since this preserves a visual illustration of on which base a task was started and finished, and I even prefer merge --no-ff for this purpose. It has other drawbacks however. Also many haven't realized the useful property of merging - that it isn't commutative (merging a topic branch into master does not mean merging master into the topic branch). I am looking for a natural workflow - sometimes mistakes happen because our procedures don't capture a specific situation with simple rules. For example a fix needed for earlier releases should of course be based sufficiently downstream to be possible to merge upstream into all branches necessary (is the usage of these terms clear enough?). However it happens that a fix makes it into the master before the developer realizes it should have been placed further downstream, and if that is already pushed (even worse, merged or something based on it) then the option remaining is cherry-picking, with it's associated perils... What simple rules like such do you use? Also in this is included the awkwardness of one topic branch necessarily excluding other topic branches (assuming they are branched from a common baseline). Developers don't want to finish a feature to start another one feeling like the code they just wrote is not there anymore How to avoid creating merge conflicts (due to cherry-pick)? What seems like a sure way to create a merge conflict is to cherry-pick between branches, they can never be merged again? Would applying the same commit in revert (how to do this?) in either branch possibly solve this situation? This is one reason I do not dare to push for a largely merge-based workflow. How to decompose into topical branches? - We realize that it would be awesome to assemble a finished integration from topic branches, but often work by our developers is not clearly defined (sometimes as simple as "poking around") and if some code has already gone into a "misc" topic, it can not be taken out of there again, according to the question above? How do you work with defining/approving/graduating/releasing your topic branches? Proper procedures like code review and graduating would of course be lovely, but we simply cannot keep things untangled enough to manage this - any suggestions? integration branches, illustration please? Vote and comment as much as you'd like, I'll try to keep the issue page clear and informative enough. Thanks! Below is a list of related topics on stackoverflow I have checked out: What are some good strategies to allow deployed applications to be hotfixable? Workflow description for git usage for in-house development Git workflow for corporate Linux kernel development How do you maintain development code and production code? (thanks for this PDF!) git releases management Git Cherry-pick vs Merge Workflow How to cherry-pick multiple commits How do you merge selective files with git-merge? How to cherry pick a range of commits and merge into another branch ReinH Git Workflow git workflow for making modifications you’ll never push back to origin Cherry-pick a merge Proper Git workflow for combined OS and Private code? Maintaining Project with Git Why cant Git merge file changes with a modified parent/master. Git branching / rebasing good practices When will "git pull --rebase" get me in to trouble?

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• Union struct produces garbage and general question about struct nomenclature

  - by SoulBeaver

  I read about unions the other day( today ) and tried the sample functions that came with them. Easy enough, but the result was clear and utter garbage. The first example is: union Test { int Int; struct { char byte1; char byte2; char byte3; char byte4; } Bytes; }; where an int is assumed to have 32 bits. After I set a value Test t; t.Int = 7; and then cout cout << t.Bytes.byte1 << etc... the individual bytes, there is nothing displayed, but my computer beeps. Which is fairly odd I guess. The second example gave me even worse results. union SwitchEndian { unsigned short word; struct { unsigned char hi; unsigned char lo; } data; } Switcher; Looks a little wonky in my opinion. Anyway, from the description it says, this should automatically store the result in a high/little endian format when I set the value like Switcher.word = 7656; and calling with cout << Switcher.data.hi << endl The result of this were symbols not even defined in the ASCII chart. Not sure why those are showing up. Finally, I had an error when I tried correcting the example by, instead of placing Bytes at the end of the struct, positioning it right next to it. So instead of struct {} Bytes; I wanted to write struct Bytes {}; This tossed me a big ol' error. What's the difference between these? Since C++ cannot have unnamed structs it seemed, at the time, pretty obvious that the Bytes positioned at the beginning and at the end are the things that name it. Except no, that's not the entire answer I guess. What is it then?

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• custom listview adapter getView method being called multiple times, and in no coherent order

  - by edzillion

  I have a custom list adapter: class ResultsListAdapter extends ArrayAdapter<RecordItem> { in the overridden 'getView' method I do a print to check what position is and whether it is a convertView or not: @Override public View getView(int position, View convertView, ViewGroup parent) { System.out.println("getView " + position + " " + convertView); The output of this (when the list is first displayed, no user input as yet) 04-11 16:24:05.860: INFO/System.out(681): getView 0 null 04-11 16:24:29.020: INFO/System.out(681): getView 1 android.widget.RelativeLayout@43d415d8 04-11 16:25:48.070: INFO/System.out(681): getView 2 android.widget.RelativeLayout@43d415d8 04-11 16:25:49.110: INFO/System.out(681): getView 3 android.widget.RelativeLayout@43d415d8 04-11 16:25:49.710: INFO/System.out(681): getView 0 android.widget.RelativeLayout@43d415d8 04-11 16:25:50.251: INFO/System.out(681): getView 1 null 04-11 16:26:01.300: INFO/System.out(681): getView 2 null 04-11 16:26:02.020: INFO/System.out(681): getView 3 null 04-11 16:28:28.091: INFO/System.out(681): getView 0 null 04-11 16:37:46.180: INFO/System.out(681): getView 1 android.widget.RelativeLayout@43cff8f0 04-11 16:37:47.091: INFO/System.out(681): getView 2 android.widget.RelativeLayout@43cff8f0 04-11 16:37:47.730: INFO/System.out(681): getView 3 android.widget.RelativeLayout@43cff8f0 AFAIK, though I couldn't find it stated explicitly, getView() is only called for visible rows. Since my app starts with four visible rows at least the position numbers cycling from 0-3 makes sense. But the rest is a mess: Why is getview called for each row four times? Where are these convertViews coming from when I haven't scrolled yet? I did a bit of reseach, and without getting a good answer, I did notice that people were associating this issue with layout issues. So in case, here's the layout that contains the list: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" > <TextView android:id="@+id/pageDetails" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:drawSelectorOnTop="false" /> </LinearLayout> and the layout of each individual row: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="108dp" android:padding="4dp"> <ImageView android:id="@+id/thumb" android:layout_width="120dp" android:layout_height="fill_parent" android:layout_alignParentTop="true" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_marginRight="8dp" android:src="@drawable/loading" /> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_toRightOf="@id/thumb" android:layout_alignParentBottom="true" android:singleLine="true" /> <TextView android:id="@+id/date" android:layout_width="wrap_content" android:layout_height="18dp" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:paddingRight="4dp" android:singleLine="true" /> <TextView android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="17dp" android:layout_toRightOf="@id/thumb" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:paddingRight="4dp" android:layout_alignWithParentIfMissing="true" android:gravity="center" /> Thank you for your time

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• Windows Server 2008 Task Scheduler Tasks Not Executing

  - by omatase

  I've been having an intermittent problem for some time now with the Windows Task Scheduler that I can't work out. I use the task scheduler to run a C# app I've written that has various plugins used to ensure production systems are working. This task scheduler itself is actually a production system so I have one simple task that executes every 8 minutes to notify an external monitoring system that the task scheduler is still up. If this external service fails to receive an "all-clear" at least once every 15 minutes (or so I don't remember the exact number right now) it will message us that the monitoring system is down. In the past we've had intermittent "down" messages from time to time and each time I've investigated the cause I was unable to find any problems. So this time I wanted to ask the StackOverflow community since it doesn't look like I'll have luck on my own. This morning at 2:32 AM the task fired (exactly 8 minutes after the previous firing) however the task didn't fire again until 3:28. There are no errors that I can see in the Event Viewer at this time. When I look at the Task Scheduler log there are no errors there either. Here is what the log looks like though: Information 6/11/2011 3:28:56 AM 102 Task completed (2) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:56 AM 201 Action completed (2) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 129 Created Task Process Info Information 6/11/2011 3:28:55 AM 200 Action started (1) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 100 Task Started (1) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:55 AM 107 Task triggered on scheduler Info d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:15 AM 102 Task completed (2) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:15 AM 201 Action completed (2) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:15 AM 102 Task completed (2) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:15 AM 201 Action completed (2) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:15 AM 102 Task completed (2) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:15 AM 102 Task completed (2) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:15 AM 102 Task completed (2) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:15 AM 201 Action completed (2) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:15 AM 102 Task completed (2) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:10 AM 100 Task Started (1) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 2:32:56 AM 102 Task completed (2) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:56 AM 201 Action completed (2) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 129 Created Task Process Info Information 6/11/2011 2:32:55 AM 200 Action started (1) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 100 Task Started (1) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 319 Task Engine received message to start task (1) Information 6/11/2011 2:32:55 AM 107 Task triggered on scheduler Info 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Seems kind of strange. I also have two other C# apps that run and check something each hour on the hour using task scheduler. If I look at the history for those I can see that they didn't execute at 3 AM either! They all waited until 3:28 to start as well. If I look at "tasks completed" in the Event Viewer it shows that only one task was able to run between the 2:32 AM to 3:28 AM time period. The task was "\Microsoft\Windows\RAC\RACAgent" And here's what it looked like: Information 6/11/2011 3:18:09 AM 102 Task completed (2) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:09 AM 201 Action completed (2) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 129 Created Task Process Info Information 6/11/2011 3:18:08 AM 200 Action started (1) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 100 Task Started (1) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 319 Task Engine received message to start task (1) I appreciate any ideas anyone may have.

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• log4net: what am I doing wrong?

  - by Berryl

  Being a log4net newb / boob I just copied lines from an NHibernate example project where I can see the log.txt file is updated. Is there a quick answer why mine isn't creating the file? Cheers, Berryl [assembly: log4net.Config.XmlConfigurator(Watch = true)] I saw another post here saying this should go in AssemblyInfo, but in the example project this is just another line in a static helper class. Not wanting to 'mess with' assemblyInfo I also put this in a static helper, along with the following to actually log in the same static helper class: private static readonly log4net.ILog _log = log4net.LogManager.GetLogger( System.Reflection.MethodBase.GetCurrentMethod().DeclaringType ); And in app.config, I have <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" /> </configSections> <!-- This section contains the log4net configuration settings --> <log4net> <!-- Define an output appender (where the logs can go) --> <appender name="LogFileAppender" type="log4net.Appender.FileAppender, log4net"> <param name="File" value="log.txt" /> <param name="AppendToFile" value="false" /> <layout type="log4net.Layout.PatternLayout, log4net"> <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &lt;%X{auth}&gt; - %m%n" /> </layout> </appender> <appender name="LogDebugAppender" type="log4net.Appender.DebugAppender, log4net"> <layout type="log4net.Layout.PatternLayout, log4net"> <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &lt;%X{auth}&gt; - %m%n"/> </layout> </appender> <!-- Setup the root category, set the default priority level and add the appender(s) (where the logs will go) --> <root> <priority value="ALL" /> <appender-ref ref="LogFileAppender" /> <appender-ref ref="LogDebugAppender"/> </root> <!-- Specify the level for some specific namespaces --> <!-- Level can be : ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF --> <logger name="NHibernate"> <level value="ALL" /> </logger> </log4net>

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• How to play multiple audio sources simultaneously in Silverlight

  - by Shurup

  I want to play simultaneous multiply audio sources in Silverlight. So I've created a prototype in Silverlight 4 that should play a two mp3 files containing the same ticks sound with an intervall 1 second. So these files must be sounded as one sound if they will be played together with any whole second offsets (0 and 1, 0 and 2, 1 and 1 seconds, etc.) I my prototype I use two MediaElement (me and me2) objects. DateTime startTime; private void Play_Clicked(object sender, RoutedEventArgs e) { me.SetSource(new FileStream(file1), FileMode.Open))); me2.SetSource(new FileStream(file2), FileMode.Open))); var timer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(1) }; timer.Tick += RefreshData; timer.Start(); } First file should be played at 00:00 sec. and the second in 00:02 second. void RefreshData(object sender, EventArgs e) { if(me.CurrentState != MediaElementState.Playing) { startTime = DateTime.Now; me.Play(); return; } var elapsed = DateTime.Now - startTime; if(me2.CurrentState != MediaElementState.Playing && elapsed >= TimeSpan.FromSeconds(2)) { me2.Play(); ((DispatcherTimer)sender).Stop(); } } The tracks played every time different and not simultaneous as they should (as one sound). Addition: I've tested a code from the Bobby's answer. private void Play_Clicked(object sender, RoutedEventArgs e) { me.SetSource(new FileStream(file1), FileMode.Open))); me2.SetSource(new FileStream(file2), FileMode.Open))); // This code plays well enough. // me.Play(); // me2.Play(); // But adding the 2 second offset using the timer, // they play no simultaneous. var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) }; timer.Tick += (source, arg) => { me2.Play(); ((DispatcherTimer)source).Stop(); }; timer.Start(); } Is it possible to play them together using only one MediaElement or any implementation of MediaStreamSource that can play multiply sources?

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• Gateway Page Between ASP and an ASP.NET Page

  - by ajdams

  I'll admit, I am pretty new with ASP .NET programming and I have been asked to take all our gateway pages (written in classic ASP) and make one universal gateway page to the few C# .NET applications we have (that I wrote). I tried searching here and the web and couldn't find much of anything describing a great way to do this and figured I was either not searching properly or was not properly naming what I am trying to do. I decided to to take one of the main gateway pages we had in classic ASP and use that as a base for my new gateway. Without boring you with a bunch of code I will summarize my gateway in steps and then can take advice/critique from there. EDIT: Basically what I am trying to do is go from a classic ASP page to a ASP .NET page and then back again. EDIT2: If my question is still unclear I am asking if what I have an the right start and if anyone has suggestions as to how this could be better. It can be as generic as need-be, not looking for a specific off-the-shelf code answer. My Gateway page: In the first part of the page I grab session variables and determine if the user is leaving or returning through the gateway: Code (in VB): uid = Request.QueryString("GUID") If uid = "" Then direction = "Leaving" End If ' Gather available user information. userid = Session("lnglrnregid") bankid = Session("strBankid") ' Return location. floor = Request.QueryString("Floor") ' The option chosen will determine if the user continues as SSL or not. ' If they are currently SSL, they should remain if chosen. option1 = Application(bankid & "Option1") If MID(option1, 6, 1) = "1" Then sslHttps = "s" End If Next I enter the uid into a database table (SQL-Server 2005) as a uniqueidentifier field called GUID. I omitted the stored procedure call. Lastly, I use the direction variable to determine if the user is leaving or returning and do redirects from there to the different areas of the site. Code (In VB again): If direction = "Leaving" Then Select Case floor Case "sscat", "ssassign" ' A SkillSoft course Response.Redirect("Some site here") Case "lrcat", "lrassign" ' A LawRoom course Response.Redirect("Some site here") Case Else ' Some other SCORM course like MindLeaders or a custom upload. Response.Redirect("Some site here") End Select Session.Abandon Else ' The only other direction is "Returning" ..... That's about it so far - so like I said, not an expert so any suggestions would be greatly appreciated!

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• SerialPort ReadLine() after Thread.Sleep() goes crazy

  - by Mat

  Hi everybody, I've been fighting with this issue for a day and I can't find answer for it. I am trying to read data from GPS device trough COM port in Compact Framework C#. I am using SerialPort class (actually my own ComPort class boxing SerialPort, but it adds only two fields I need, nothing special). Anyway.. I am running while loop in a separate thread which reads line from the port, analyze NMEA data, print them, catch all exceptions and then I Sleep(200) the thread, cause I need CPU for other threads... Without Sleep it works fine, but uses 100% CPU.. When I dont use Sleep after few minutes the output from COM port looks like this: GPGSA,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F GSA,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F A,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F ,18,12,271,24,24,05,020,24,14,04,326,25,11,03,023,*76 A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F 3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F 09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F ,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F as you can see the same message is read few times but cut. I wonder what I'm doing wrong... My port configuration: port.ReadBufferSize = 4096; port.BaudRate = 4800; port.DataBits = 8; port.Parity = Parity.None; port.StopBits = StopBits.One; port.NewLine = "\r\n"; port.ReadTimeout = 1000; port.ReceivedBytesThreshold = 100000; And my reading function: private void processGps(){ while (!closing) { //reconnect if needed try { string sentence = port.ReadLine(); //here print the sentence //analyze the sentence (this takes some time 50-100ms) } catch (TimeoutException) { Thread.Sleep(0); } catch (IOException ioex) { //handling IO exception (some info on the screen) } Thread.Sleep(200); } } There is some more stuff in this function like reconnection if the device is lost etc.. but it is not called when the GPS is connected properly.. I was trying port.DiscardInBuffer(); after some blocks of code (in TimeoutException, after read..) Did anyone had similar problem? I really dont know what I'm doing wrong.. The only way to get rig of it is removing the last Sleep... Thanks in advance! Best Regards, Mat

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• Converting listview to a composite control

  - by Paul

  The link below shows a listview composite control in its most basic form however I can't seem to extend this to what I'm trying to do. http://stackoverflow.com/questions/92689/how-to-define-listview-templates-in-code My listview has 1 tablerow with 2 fields. The first field contains 1 element whilst the second field contains 2 elements as shown below. <asp:ListView ID="lstArticle" runat="server"> <LayoutTemplate> <table id="itemPlaceholder" runat="server"> </table> </LayoutTemplate> <ItemTemplate> <div class="ctrlArticleList_rptStandardItem"> <table width="100%"> <tr> <td valign="top" class="ctrlArticleList_firstColumnWidth"> <a href="<%# GetURL(Container.DataItem) %>"> <%# GetImage(Container.DataItem)%> </a> </td> <td valign="top"> <span class="ctrlArticleList_title"> <a href="<%# GetURL(Container.DataItem) %>"> <%# DataBinder.Eval(Container.DataItem, "Title") %> </a> </span> <span class="ctrlArticleList_date"> <%# convertToShortDate(DataBinder.Eval(Container.DataItem, "ActiveDate"))%> </span> <div class="ctrlArticleList_standFirst"> <%# DataBinder.Eval(Container.DataItem, "StandFirst")%> </div> </td> </tr> </table> </div> </ItemTemplate> So to convert this I have to use the InstantiateIn method of the ITemplate for the layouttemplate and the ItemTemplate. Data is bound to the itemtemplate using the DataBinding event. My question at the moment is how do I setup the ItemTemplate class and bind the values from the above ListView ItemTemplate. This is what I've managed so far: private class LayoutTemplate : ITemplate { public void InstantiateIn(Control container) { var table = new HtmlGenericControl("table") { ID = "itemPlaceholder" }; container.Controls.Add(table); } } private class ItemTemplate : ITemplate { public void InstantiateIn(Control container) { var tableRow = new HtmlGenericControl("tr"); //first field in row var tableFieldImage = new HtmlGenericControl("td"); var imageLink = new HtmlGenericControl("a"); imageLink.ID = "imageLink"; tableRow.Controls.Add(imageLink); // second field in row var tableFieldTitle = new HtmlGenericControl("td"); var title = new HtmlGenericControl("a"); tableFieldTitle.Controls.Add(title); tableRow.Controls.Add(tableFieldTitle); //Bind the data with the controls tableRow.DataBinding += BindData; //add the controls to the container container.Controls.Add(tableRow); } public void BindData(object sender, EventArgs e) { var container = (HtmlGenericControl)sender; var dataItem = ((ListViewDataItem)container.NamingContainer).DataItem; container.Controls.Add(new Literal() { Text = dataItem.ToString() }); } One of the functions in the ListView just for an example is: public string GetURL(object objArticle) { ArticleItem articleItem = (ArticleItem)objArticle; Article article = new Article(Guid.Empty, articleItem.ContentVersionID); return GetArticleURL(article); } Summary What do I need to do to convert the following into a composite control: 1. <a href="<%# GetURL(Container.DataItem) %>"><%# GetImage(Container.DataItem)%></a> 2. <a href="<%# GetURL(Container.DataItem) %>"> <%# DataBinder.Eval(Container.DataItem, "Title") %> </a>

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• Create an Alias Directory inside a Virtual Host

  - by Praveen Kumar

  First, let me say, I asked this question in StackOverflow, and thought I could get more replies here. I checked here, here, here, here, here, and here before asking this question. I guess my search skills are weak. I am using the WampServer version 2.2e. I have a need like, I need a virtual path inside a virtual host. Let me say the two hosts that I have. Primary Virtual Host (Localhost) NameVirtualHost *:80 <VirtualHost *:80> ServerName localhost DocumentRoot "C:/Wamp/www" </VirtualHost> My Apps Virtual Hosts <VirtualHost *:80> ServerName apps.ptrl DocumentRoot "C:/Wamp/vhosts/ptrl/apps" ErrorLog "logs/apps-ptrl-error.log" CustomLog "logs/apps-ptrl-access.log" common <Directory "C:/Wamp/vhosts/ptrl/apps"> allow from all order allow,deny AllowOverride All </Directory> DirectoryIndex index.html index.htm index.php </VirtualHost> My Blog Virtual Host <VirtualHost *:80> ServerName blog.praveen-kumar.ptrl DocumentRoot "C:/Wamp/vhosts/ptrl/praveen-kumar/blog" ErrorLog "logs/praveen-kumar-ptrl-error.log" CustomLog "logs/praveen-kumar-ptrl-access.log" common <Directory "C:/Wamp/vhosts/ptrl/praveen-kumar/blog"> allow from all order allow,deny AllowOverride All </Directory> DirectoryIndex index.html index.htm index.php </VirtualHost> My requirement now is to have http://apps.ptrl/blog/ and http://blog.praveen-kumar.ptrl/ should be the same directory. One thing I thought of is, moving the blog folder inside the apps folder, but it is connected with Git and other stuffs are there, so it is not possible to move the folder. So, I thought of creating an alias to the VirtualHost in this way: <VirtualHost *:80> ServerName apps.ptrl DocumentRoot "C:/Wamp/vhosts/ptrl/apps" ErrorLog "logs/apps-ptrl-error.log" CustomLog "logs/apps-ptrl-access.log" common <Directory "C:/Wamp/vhosts/ptrl/apps"> allow from all order allow,deny AllowOverride All </Directory> DirectoryIndex index.html index.htm index.php # The alias to the blog! Alias /blog "C:/Wamp/vhosts/ptrl/praveen-kumar/blog" <Directory "C:/Wamp/vhosts/ptrl/praveen-kumar/blog"> allow from all order allow,deny AllowOverride All </Directory> </VirtualHost> But when I tried to access http://apps.ptrl/blog, I am getting an Error 403 Forbidden page. Am I doing the right thing? If you need to look at the access log, and error log, they are here: # Access Log 127.0.0.1 - - [14/Oct/2012:09:53:11 +0530] "GET /blog HTTP/1.1" 403 206 127.0.0.1 - - [14/Oct/2012:09:53:11 +0530] "GET /favicon.ico HTTP/1.1" 404 209 127.0.0.1 - - [14/Oct/2012:09:53:53 +0530] "GET / HTTP/1.1" 200 6935 127.0.0.1 - - [14/Oct/2012:09:53:53 +0530] "GET /app/blog/thumb.png HTTP/1.1" 404 216 # Error Log [Sun Oct 14 09:53:11 2012] [error] [client 127.0.0.1] client denied by server configuration: C:/Wamp/vhosts/ptrl/praveen-kumar/blog [Sun Oct 14 09:53:11 2012] [error] [client 127.0.0.1] File does not exist: C:/Wamp/vhosts/ptrl/apps/favicon.ico [Sun Oct 14 09:53:53 2012] [error] [client 127.0.0.1] File does not exist: C:/Wamp/vhosts/ptrl/apps/app/blog, referer: http://apps.ptrl/ Waiting eagerly for some help. I am ready to provide more info, if needed. Update #1: Changed VirtualHosts: <VirtualHost *:80> ServerName apps.ptrl DocumentRoot "C:/Wamp/vhosts/ptrl/apps" ErrorLog "logs/apps-ptrl-error.log" CustomLog "logs/apps-ptrl-access.log" common # The alias to the blog! Alias /blog "C:/Wamp/vhosts/ptrl/praveen-kumar/blog" <Directory "C:/Wamp/vhosts/ptrl/praveen-kumar/blog"> allow from all order allow,deny AllowOverride All </Directory> <Directory "C:/Wamp/vhosts/ptrl/apps"> allow from all order allow,deny AllowOverride All </Directory> DirectoryIndex index.html index.htm index.php </VirtualHost> The issue now: I am able to access the site. The physical links are working now. i.e., I am able to open http://apps.ptrl/blog/index.php but not http://apps.ptrl/blog/view-1.ptf, which gets translated to http://apps.ptrl/blog/index.php?page=view&id=1. Any solutions?

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• Nested Sortable JQuery list doesn't work in IE while it does in FF

  - by Ben Fransen

  Hello everybody, While I'm using this site quite often as a resource for jQuery related problems I can't seem to find an answer this time. So here is my first post. During daytime at work I'm developing an informationsystem for generating MS Word documents. One of the modules I'm developing is for defining a default chapterselection for the table of contents and selecting texts by the given chapters. A user can submit new chapters and if necessary, add them as childchapter to a parent, flag them as 'adopt in TOC' and link a default text (from another module) to the chapter. My chapterlist is retreived recursively from a MySQL table and could look something like this: <ul class="sortableChapterlist"> <li>1</li> <li>2 <ul class="sortableChapterlist"> <li>2.1</li> <li>2.2</li> <li>2.3 <ul class="sortableChapterlist"> <li>2.3.1</li> <li>2.3.2</li> </ul> </li> </ul> </li> </ul> In FireFox the code works like a charm but IE (7) doesn't seem to like it that much. I'm only able to correctly drag arround the mainchapters. When attempting to drag a subchapter, no matter it's level, the correspondending mainchapter lifts up with some child, never all. This is the jQuery code I'm using to accomplish the task: $(function(){ $(".sortableChapterlist").sortable({ opacity: 0.7, helper: 'clone', cursor: 'move' }); $(".sortableChapterlist").selectable(); $(".sortableChapterlist").disableSelection(); }); Does anybody have some ideas about this? I'm guessing IE kinda falls over the multiple class reference "chapter_list" in combination with jQuery trying to handle the draggable/sortable. Kinds regards from Holland, Ben Fransen

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• How does one paint the entire row's background in a QStyledItemDelegate ?

  - by Casey Link

  I have a QTableView which I am setting a custom QStyledItemDelegate on. In addition to the custom item painting, I want to style the row's background color for the selection/hovered states. The look I am going for is something like this KGet screenshot: Here is my code: void MyDelegate::paint( QPainter* painter, const QStyleOptionViewItem& opt, const QModelIndex& index ) const { QBrush backBrush; QColor foreColor; bool hover = false; if ( opt.state & QStyle::State_MouseOver ) { backBrush = opt.palette.color( QPalette::Highlight ).light( 115 ); foreColor = opt.palette.color( QPalette::HighlightedText ); hover = true; } QStyleOptionViewItemV4 option(opt); initStyleOption(&option, index); painter->save(); const QStyle *style = option.widget ? option.widget->style() : QApplication::style(); const QWidget* widget = option.widget; if( hover ) { option.backgroundBrush = backBrush; } painter->save(); style->drawPrimitive(QStyle::PE_PanelItemViewItem, &option, painter, widget); painter->restore(); switch( index.column() ) { case 0: // we want default behavior style->drawControl(QStyle::CE_ItemViewItem, &option, painter, widget); break; case 1: // some custom drawText break; case 2: // draw a QStyleOptionProgressBar break; } painter->restore(); } The result is that each individual cell receives the mousedover background only when the mouse is over it, and not the entire row. It is hard to describe so here is a screenshot: In that picture the mouse was over the left most cell, hence the highlighted background.. but I want the background to be drawn over the entire row. How can I achieve this? Edit: With some more thought I've realized that the QStyle::State_MouseOver state is only being passed for actual cell which the mouse is over, and when the paint method is called for the other cells in the row QStyle::State_MouseOver is not set. So the question becomes is there a QStyle::State_MouseOver_Row state (answer: no), so how do I go about achieving that?

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• How can we implement change notification propagation for WPF and SL in the MVVM pattern?

  - by Firoso

  Here's an example scenario targetting MVVM WPF/SL development: View data binds to view model Property "Target" "Target" exposes a field of an object called "data" that exists in the local application model, called "Original" when "Original" changes, it should raise notification to the view model and then propogate that change notification to the View. Here are the solutions I've come up with, but I don't like any of them all that much. I'm looking for other ideas, by the time we come up with something rock solid I'm certain Microsoft will have released .NET 5 with WPF/SL extensions for better tools for MVVM development. For now the question is, "What have you done to solve this problem and how has it worked out for you?" Option 1. Proposal: Attach a handler to data's PropertyChanged event that watches for string values of properties it cares about that might have changed, and raises the appropriate notification. Why I don't like it: Changes don't bubble naturally, objects must be explicitly watched, if data changes to a new source, events must be un-registered/registered. Why I kind of like it: I get explicit control over propogation of changes, and I don't have to use any types that belong at a higher level of the application such as dependancy properties. Option 2. Proposal: Attach a handler to data's PropertyChanged event that re-raises the event across all properties using the name property name. Why I don't like it: This is essentially the same as option 1, but less intelligent, and forces me to never change my property names, as they have to be the same as the property names on data Why I kind of like it: It's very easy to set up and I don't have to think about it... Then again if I try to think, and change names to things that make sense, I shoot myself in the foot, and then I have to think about it! Option 3. Proposal: Inherit my view model from dependancy object, and notify binding sources of changes directly. Why I don't like it: I'm not even 100% sure dependancy properties/objects can DO this, it was just a thought to look into. Also I don't personally feel that WPF/SL types like Dep Obj belong at the view model level. Why I kind of like it: IF it has the capability that I'm seeking then it's a good answer! minus that pesky layering issue. Option 4. Proposal: Use a consistant agent messaging system based off of Task Parallels DataFlow Library to propogate everything through linked pipelining. Why I don't like it: I've never tried this, and somehow I think it will be lacking, plus it requires me to think about my code completely differently all the way around. Why I kind of like it: It has the possiblity of allowing me to do some VERY fun manipulations with a push based data model and using ActionBlocks as validation AND setters to then privately change view model properties and explicitly control PropertyChanged notifications.

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• Best practices concerning view model and model updates with a subset of the fields

  - by Martin

  By picking MVC for developing our new site, I find myself in the midst of "best practices" being developed around me in apparent real time. Two weeks ago, NerdDinner was my guide but with the development of MVC 2, even it seems outdated. It's an thrilling experience and I feel privileged to be in close contact with intelligent programmers daily. Right now I've stumbled upon an issue I can't seem to get a straight answer on - from all the blogs anyway - and I'd like to get some insight from the community. It's about Editing (read: Edit action). The bulk of material out there, tutorials and blogs, deal with creating and view the model. So while this question may not spell out a question, I hope to get some discussion going, contributing to my decision about the path of development I'm to take. My model represents a user with several fields like name, address and email. All the names, in fact, on field each for first name, last name and middle name. The Details view displays all these fields but you can change only one set of fields at a time, for instance, your names. The user expands a form while the other fields are still visible above and below. So the form that is posted back contains a subset of the fields representing the model. While this is appealing to us and our layout concerns, for various reasons, it is to be shunned by serious MVC-developers. I've been reading about some patterns and best practices and it seems that this is not in key with the paradigm of viewmodel == view. Or have I got it wrong? Anyway, NerdDinner dictates using FormCollection och UpdateModel. All the null fields are happily ignored. Since then, the MVC-community has abandoned this approach to such a degree that a bug in MVC 2 was not discovered. UpdateModel does not work without a complete model in your formcollection. The view model pattern receiving most praise seems to be Dedicated view model that contains a custom view model entity and is the only one that my design issue could be made compatible with. It entails a tedious amount of mapping, albeit lightened by the use of AutoMapper and the ideas of Jimmy Bogard, that may or may not be worthwhile. He also proposes a 1:1 relationship between view and view model. In keeping with these design paradigms, I am to create a view and associated view for each of my expanding sets of fields. The view models would each be nearly identical, differing only in the fields which are read-only, the views also containing much repeated markup. This seems absurd to me. In future I may want to be able to display two, more or all sets of fields open simultaneously. I will most attentively read the discussion I hope to spark. Many thanks in advance.

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• Why do I get the error "Only antlib URIs can be located from the URI alone,not the URI" when trying to run hibernate tools in my build.xml

  - by Casbah

  I'm trying to run hibernate tools in an ant build to generate ddl from my JPA annotations. Ant dies on the taskdef tag. I've tried with ant 1.7, 1.6.5, and 1.6 to no avail. I've tried both in eclipse and outside. I've tried including all the hbn jars in the hibernate-tools path and not. Note that I based my build file on this post: http://stackoverflow.com/questions/281890/hibernate-jpa-to-ddl-command-line-tools I'm running eclipse 3.4 with WTP 3.0.1 and MyEclipse 7.1 on Ubuntu 8. Build.xml: <project name="generateddl" default="generate-ddl"> <path id="hibernate-tools"> <pathelement location="../libraries/hibernate-tools/hibernate-tools.jar" /> <pathelement location="../libraries/hibernate-tools/bsh-2.0b1.jar" /> <pathelement location="../libraries/hibernate-tools/freemarker.jar" /> <pathelement location="../libraries/jtds/jtds-1.2.2.jar" /> <pathelement location="../libraries/hibernate-tools/jtidy-r8-20060801.jar" /> </path> <taskdef classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="hibernate-tools"/> <target name="generate-ddl" description="Export schema to DDL file"> <!-- compile model classes before running hibernatetool --> <!-- task definition; project.class.path contains all necessary libs <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="project.class.path" /> --> <hibernatetool destdir="sql"> <!-- check that directory exists --> <jpaconfiguration persistenceunit="default" /> <classpath> <dirset dir="WebRoot/WEB-INF/classes"> <include name="**/*"/> </dirset> </classpath> <hbm2ddl outputfilename="schemaexport.sql" format="true" export="false" drop="true" /> </hibernatetool> </target> Error message (ant -v): Apache Ant version 1.7.0 compiled on December 13 2006 Buildfile: /home/joe/workspace/bento/ant-generate-ddl.xml parsing buildfile /home/joe/workspace/bento/ant-generate-ddl.xml with URI = file:/home/joe/workspace/bento/ant-generate-ddl.xml Project base dir set to: /home/joe/workspace/bento [antlib:org.apache.tools.ant] Could not load definitions from resource org/apache/tools/ant/antlib.xml. It could not be found. BUILD FAILED /home/joe/workspace/bento/ant-generate-ddl.xml:12: Only antlib URIs can be located from the URI alone,not the URI at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:216) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:140) at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.parseBuildFile(InternalAntRunner.java:191) at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:400) at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137) Total time: 195 milliseconds

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• Problem with System.Diagnostics.Process RedirectStandardOutput to appear in Winforms Textbox in real

  - by Jonathan Websdale

  I'm having problems with the redirected output from a console application being presented in a Winforms textbox in real-time. The messages are being produced line by line however as soon as interaction with the Form is called for, nothing appears to be displayed. Following the many examples on both Stackoverflow and other forums, I can't seem to get the redirected output from the process to display in the textbox on the form until the process completes. By adding debug lines to the 'stringWriter_StringWritten' method and writing the redirected messages to the debug window I can see the messages arriving during the running of the process but these messages will not appear on the form's textbox until the process completes. Grateful for any advice on this. Here's an extract of the code public partial class RunExternalProcess : Form { private static int numberOutputLines = 0; private static MyStringWriter stringWriter; public RunExternalProcess() { InitializeComponent(); // Create the output message writter RunExternalProcess.stringWriter = new MyStringWriter(); stringWriter.StringWritten += new EventHandler(stringWriter_StringWritten); System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(); startInfo.FileName = "myCommandLineApp.exe"; startInfo.UseShellExecute = false; startInfo.RedirectStandardOutput = true; startInfo.CreateNoWindow = true; startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; using (var pProcess = new System.Diagnostics.Process()) { pProcess.StartInfo = startInfo; pProcess.OutputDataReceived += new System.Diagnostics.DataReceivedEventHandler(RunExternalProcess.Process_OutputDataReceived); pProcess.EnableRaisingEvents = true; try { pProcess.Start(); pProcess.BeginOutputReadLine(); pProcess.BeginErrorReadLine(); pProcess.WaitForExit(); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } finally { pProcess.OutputDataReceived -= new System.Diagnostics.DataReceivedEventHandler(RunExternalProcess.Process_OutputDataReceived); } } } private static void Process_OutputDataReceived(object sender, System.Diagnostics.DataReceivedEventArgs e) { if (!string.IsNullOrEmpty(e.Data)) { RunExternalProcess.OutputMessage(e.Data); } } private static void OutputMessage(string message) { RunExternalProcess.stringWriter.WriteLine("[" + RunExternalProcess.numberOutputLines++.ToString() + "] - " + message); } private void stringWriter_StringWritten(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine(((MyStringWriter)sender).GetStringBuilder().ToString()); SetProgressTextBox(((MyStringWriter)sender).GetStringBuilder().ToString()); } private delegate void SetProgressTextBoxCallback(string text); private void SetProgressTextBox(string text) { if (this.ProgressTextBox.InvokeRequired) { SetProgressTextBoxCallback callback = new SetProgressTextBoxCallback(SetProgressTextBox); this.BeginInvoke(callback, new object[] { text }); } else { this.ProgressTextBox.Text = text; this.ProgressTextBox.Select(this.ProgressTextBox.Text.Length, 0); this.ProgressTextBox.ScrollToCaret(); } } } public class MyStringWriter : System.IO.StringWriter { // Define the event. public event EventHandler StringWritten; public MyStringWriter() : base() { } public MyStringWriter(StringBuilder sb) : base(sb) { } public MyStringWriter(StringBuilder sb, IFormatProvider formatProvider) : base(sb, formatProvider) { } public MyStringWriter(IFormatProvider formatProvider) : base(formatProvider) { } protected virtual void OnStringWritten() { if (StringWritten != null) { StringWritten(this, EventArgs.Empty); } } public override void Write(char value) { base.Write(value); this.OnStringWritten(); } public override void Write(char[] buffer, int index, int count) { base.Write(buffer, index, count); this.OnStringWritten(); } public override void Write(string value) { base.Write(value); this.OnStringWritten(); } }

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• codes to convert from avi to asf

  - by George2

  Hello everyone, No matter what library/SDK to use, I want to convert from avi to asf very quickly (I could even sacrifice some quality of video and audio). I am working on Windows platform (Vista and 2008 Server), better .Net SDK/code, C++ code is also fine. :-) I learned from the below link, that there could be a very quick way to convert from avi to asf to support streaming better, as mentioned "could convert the video from AVI to ASF format using a simple copy (i.e. the content is the same, but container changes).". My question is after some hours of study and trial various SDK/tools, as a newbie, I do not know how to begin with so I am asking for reference sample code to do this task. :-) (as this is a different issue, we decide to start a new topic. :-) ) http://stackoverflow.com/questions/743220/streaming-avi-file-issue thanks in advance, George EDIT 1: I have tried to get the binary of ffmpeg from, http://ffmpeg.arrozcru.org/autobuilds/ffmpeg-latest-mingw32-static.tar.bz2 then run the following command, C:\software\ffmpeg-latest-mingw32-static\bin>ffmpeg.exe -i test.avi -acodec copy -vcodec copy test.asf FFmpeg version SVN-r18506, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --enable-memalign-hack --prefix=/mingw --cross-prefix=i686-ming w32- --cc=ccache-i686-mingw32-gcc --target-os=mingw32 --arch=i686 --cpu=i686 --e nable-avisynth --enable-gpl --enable-zlib --enable-bzlib --enable-libgsm --enabl e-libfaac --enable-pthreads --enable-libvorbis --enable-libmp3lame --enable-libo penjpeg --enable-libtheora --enable-libspeex --enable-libxvid --enable-libfaad - -enable-libschroedinger --enable-libx264 libavutil 50. 3. 0 / 50. 3. 0 libavcodec 52.25. 0 / 52.25. 0 libavformat 52.32. 0 / 52.32. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0. 7. 1 / 0. 7. 1 built on Apr 14 2009 04:04:47, gcc: 4.2.4 Input #0, avi, from 'test.avi': Duration: 00:00:44.86, start: 0.000000, bitrate: 5291 kb/s Stream #0.0: Video: msvideo1, rgb555le, 1280x1024, 5 tbr, 5 tbn, 5 tbc Stream #0.1: Audio: pcm_s16le, 22050 Hz, mono, s16, 352 kb/s Output #0, asf, to 'test.asf': Stream #0.0: Video: CRAM / 0x4D415243, rgb555le, 1280x1024, q=2-31, 1k tbn, 5 tbc Stream #0.1: Audio: pcm_s16le, 22050 Hz, mono, s16, 352 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding frame= 224 fps=222 q=-1.0 Lsize= 29426kB time=44.80 bitrate=5380.7kbits/s video:26910kB audio:1932kB global headers:0kB muxing overhead 2.023317% C:\software\ffmpeg-latest-mingw32-static\bin> http://www.microsoft.com/windows/windowsmedia/player/webhelp/default.aspx?&mpver=11.0.6001.7000&id=C00D11B1&contextid=230&originalid=C00D36E6 then have the following error when using Windows Media Player to play it, does anyone have any ideas? http://www.microsoft.com/windows/windowsmedia/player/webhelp/default.aspx?&mpver=11.0.6001.7000&id=C00D11B1&contextid=230&originalid=C00D36E6

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• Asynchronous readback from opengl front buffer using multiple PBO's

  - by KillianDS

  I am developing an application that needs to read back the whole frame from the front buffer of an openGL application. I can hijack the application's opengl library and insert my code on swapbuffers. At the moment I am successfully using a simple but excruciating slow glReadPixels command without PBO's. Now I read about using multiple PBO's to speed things up. While I think I've found enough resources to actually program that (isn't that hard), I have some operational questions left. I would do something like this: create a series (e.g. 3) of PBO's use glReadPixels in my swapBuffers override to read data from front buffer to a PBO (should be fast and non-blocking, right?) Create a seperate thread to call glMapBufferARB, once per PBO after a glReadPixels, because this will block until the pixels are in client memory. Process the data from step 3. Now my main concern is of course in steps 2 and 3. I read about glReadPixels used on PBO's being non-blocking, will this be an issue if I issue new opengl commands after that very fast? Will those opengl commands block? Or will they continue (my guess), and if so, I guess only swapbuffers can be a problem, will this one stall or will glReadPixels from front buffer be many times faster than swapping (about each 15-30ms) or, worst case scenario, will swapbuffers be executed while glReadPixels is still reading data to the PBO? My current guess is this logic will do something like this: copy FRONT_BUFFER - generic place in VRAM, copy VRAM-RAM. But I have no idea which of those 2 is the real bottleneck and more, what the influence on the normal opengl command stream is. Then in step 3. Is it wise to do this asynchronously in a thread separated from normal opengl logic? At the moment I think not, It seems you have to restore buffer operations to normal after doing this and I can't install synchronization objects in the original code to temporarily block those. So I think my best option is to define a certain swapbuffer delay before reading them out, so e.g. calling glReadPixels on PBO i%3 and glMapBufferARB on PBO (i+2)%3 in the same thread, resulting in a delay of 2 frames. Also, when I call glMapBufferARB to use data in client memory, will this be the bottleneck or will glReadPixels (asynchronously) be the bottleneck? And finally, if you have some better ideas to speed up frame readback from GPU in opengl, please tell me, because this is a painful bottleneck in my current system. I hope my question is clear enough, I know the answer will probably also be somewhere on the internet but I mostly came up with results that used PBO's to keep buffers in video memory and do processing there. I really need to read back the front buffer to RAM and I do not find any clear explanations about performance in that case (which I need, I cannot rely on "it's faster", I need to explain why it's faster). Thank you

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• Need a little help with sound in a JApplet

  - by jacob schuschel

  I am working on a solitaire game in Java, and i need to implement sound when the desk is shuffled, card flipped, etc. I used the following sites as reference to try and get it to work, but i am getting Null Pointer Exceptions or mishandled URL exception (depending on what i tweak). here Also, i am using netbeans 6.7.1 as my IDE. I will try to break down the code and explain: package cardgame; import java.applet.*; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JApplet; import javax.swing.*; import java.io.*; import java.net.*; /** * * @author jacob */ public class Sound extends JApplet { private AudioClip song; // Sound player private String URL = null; private URL songPath; // Sound path /* *sound_1 = shuffling cards *sound_2 = to discard *sound_3 = from discard *sound_4 = cardflip 1 *sound_5 = cardflip 2 */ Sound(String filename) { try { songPath = new URL(getCodeBase(),filename); // Get the Sound URL } catch (MalformedURLException ex) { Logger.getLogger(Sound.class.getName()).log(Level.SEVERE, null, ex); } song = getAudioClip(songPath); // Load the Sound } Sound(int i) { URL = "./sounds/sound_" + i + ".wav"; System.out.println(URL); try { songPath = new URL(URL); // Get the Sound URL song = getAudioClip(songPath); } catch (MalformedURLException ex) { Logger.getLogger(Sound.class.getName()).log(Level.SEVERE, null, ex); } } public void playSound() { song.loop(); // Play } public void stopSound() { song.stop(); // Stop } public void playSoundOnce() { song.play(); // Play only once } } The 2 different construcors are for different ways i tried to implement this. The first one creates the filepath, and passes it in. The second one builds the filepath in the constructor, given a sound # (i made a list of what numbers correspond to what sound for reference). I am getting the followig errors out: ./sounds/sound_1.wav Nov 16, 2009 4:14:13 PM cardgame.Sound ./sounds/sound_2.wav SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_1.wav ./sounds/sound_3.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) ./sounds/sound_4.wav ./sounds/sound_5.wav at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_2.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_3.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_4.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_5.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Thanks for those who read and more thanks to those who help. I know it is somewhat long, but i would rather get it all out there, than have 50 questions that come back or have people not answer due to lack of initial info. also only lets me post a single link right now, so the links are given below dreamincode.net/forums/showtopic14083.htm stackoverflow.com/questions/512436/java-playing-wav-sounds deitel.com/articles/java_tutorials/20060422/LoadingPlayingAudioClips/index.html

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