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  • QTableWidget: How can I get tighter lines with less vertical spacing padding?

    - by Dirk Eddelbuettel
    The QTableWdiget is fabulous for simple grid displays. Changing colors, fonts, etc is straightforward. However, I did not manage to give the grid a 'tighter' look with less vertical whitespace. I see that the Qt documentation talks (eg here) about margin border padding around widgets, but when I set these I only get changes around the entire grid widget rather than inside. How can I set this (with a style sheet, or hard-coded options) directly to make the QTableWidget display tighter?

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  • don't understand pisa(xhtml2pdf) license

    - by sacabuche
    A client ask me to generate PDF in python, but i don't know if i have to pay the license or just use it. what do i have to do? In their web site said: XHTML2PDF is dual-licensed: 1. GNU General Public License Version 2.0 (GPLv2) 2. A commercial license In their docs: pisa is copyrighted by Dirk Holtwick, Germany. pisa is distributed by Dirk Holtwick, Schreiberstraße 2, 47058 Duisburg, Germany. pisa is licensed under the GNU Gerneral Public License version 2. thanks

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  • How do I minimize the number of changes between revisions with new doxygen output?

    - by Dirk Eddelbuettel
    A subversion repository contains the html, latex and man directories that doxygen generates from the source code. Even for small source code changes, new files are being generated with random names which makes for large changes in the version control system. Is there are way around this? How can I minimize the changesets between revisions while still including doxygen-generated documentation? Alternatively, how could I find which of the doxygen-genrated files are no longer being used and should be removed?

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  • dynamically created controls and responding to control events

    - by Dirk
    I'm working on an ASP.NET project in which the vast majority of the forms are generated dynamically at run time (form definitions are stored in a DB for customizability). Therefore, I have to dynamically create and add my controls to the Page every time OnLoad fires, regardless of IsPostBack. This has been working just fine and .NET takes care of managing ViewState for these controls. protected override void OnLoad(EventArgs e) { base.OnLoad(e); RenderDynamicControls() } private void RenderDynamicControls(){ //1. call service layer to retrieve form definition //2. create and add controls to page container } I have a new requirement in which if a user clicks on a given button (this button is created at design time) the page should be re-rendered in a slightly different way. So in addition to the code that executes in OnLoad (i.e. RenderDynamicControls()), I have this code: protected void MyButton_Click(object sender, EventArgs e) { RenderDynamicControlsALittleDifferently() } private void RenderDynamicControlsALittleDifferently() (){ //1. clear all controls from the page container added in RenderDynamicControls() //2. call service layer to retrieve form definition //3. create and add controls to page container } My question is, is this really the only way to accomplish what I'm after? It seems beyond hacky to effectively render the form twice simply to respond to a button click. I gather from my research that this is simply how the page-lifecycle works in ASP.NET: Namely, that OnLoad must fire on every Postback before child events are invoked. Still, it's worthwhile to check with the SO community before having to drink the kool-aid. On a related note, once I get this feature completed, I'm planning on throwing an UpdatePanel on the page to perform the page updates via Ajax. Any code/advice that make that transition easier would be much appreciated. Thanks

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  • Using of ApplicationSettings in markup code

    - by Dirk
    I want to use ApplicationSettings in the markup code of an ASP.NET Web Application. Inspired by code behind this was my first try: <%= My.Settings.MyApplicationSetting %> No success. I ended up with this lengthy statement <%= Global.MyRootNameSpace.My.MySettings.Default.MyApplicationSetting %> I can’t believe that this is the best solution. Isn’t it?

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  • Dynamically created controls and the ASP.NET page lifecycle

    - by Dirk
    I'm working on an ASP.NET project in which the vast majority of the forms are generated dynamically at run time (form definitions are stored in a DB for customizability). Therefore, I have to dynamically create and add my controls to the Page every time OnLoad fires, regardless of IsPostBack. This has been working just fine and .NET takes care of managing ViewState for these controls. protected override void OnLoad(EventArgs e) { base.OnLoad(e); RenderDynamicControls() } private void RenderDynamicControls(){ //1. call service layer to retrieve form definition //2. create and add controls to page container } I have a new requirement in which if a user clicks on a given button (this button is created at design time) the page should be re-rendered in a slightly different way. So in addition to the code that executes in OnLoad (i.e. RenderDynamicControls()), I have this code: protected void MyButton_Click(object sender, EventArgs e) { RenderDynamicControlsALittleDifferently() } private void RenderDynamicControlsALittleDifferently() (){ //1. clear all controls from the page container added in RenderDynamicControls() //2. call service layer to retrieve form definition //3. create and add controls to page container } My question is, is this really the only way to accomplish what I'm after? It seems beyond hacky to effectively render the form twice simply to respond to a button click. I gather from my research that this is simply how the page-lifecycle works in ASP.NET: Namely, that OnLoad must fire on every Postback before child events are invoked. Still, it's worthwhile to check with the SO community before having to drink the kool-aid. On a related note, once I get this feature completed, I'm planning on throwing an UpdatePanel on the page to perform the page updates via Ajax. Any code/advice that make that transition easier would be much appreciated. Thanks

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  • What trick will give most reliable/compatible sound alarm in a browser window for most browsers

    - by Dirk Paessler
    I want to be able to play an alarm sound using Javascript in a browser window, preferably with the requirement for any browser plugins (Quicktime/Flash). I have been experimenting with the tag and the new Audio object in Javascript, but results are mixed: As you can see, there is no variant that works on all browsers. Do I miss a trick that is more cross-browser compatible? This is my code: // mp3 with Audio object var snd = new Audio("/sounds/beep.mp3");snd.play(); // wav with Audio object var snd = new Audio("/sounds/beep.wav");snd.play(); // mp3 with EMBED tag $("#alarmsound").empty().append ('<embed src="/sounds/beep.mp3" autostart="true" loop="false" '+ 'volume="100" hidden="true" width="1" height="1" />'); // wav with EMBED tag $("#alarmsound").empty().append ('<embed src="/sounds/beep.wav" autostart="true" loop="false" '+ 'volume="100" hidden="true" width="1" height="1" />'); }

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  • Beginner's resources/introductions to classification algorithms.

    - by Dirk
    Hi, everybody. I am entirely new to the topic of classification algorithms, and need a few good pointers about where to start some "serious reading". I am right now in the process of finding out, whether machine learning and automated classification algorithms could be a worthwhile thing to add to some application of mine. I already scanned through "How to Solve It: Modern heuristics" by Z. Michalewicz and D. Fogel (in particular, the chapters about linear classifiers using neuronal networks), and on the practical side, I am currently looking through the WEKA toolkit source code. My next (planned) step would be to dive into the realm of Bayesian classification algorithms. Unfortunately, I am lacking a serious theoretical foundation in this area (let alone, having used it in any way as of yet), so any hints at where to look next would be appreciated; in particular, a good introduction of available classification algorithms would be helpful. Being more a craftsman and less a theoretician, the more practical, the better... Hints, anyone?

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  • What is the most useful R trick?

    - by Dirk Eddelbuettel
    In order to share some more tips and tricks for R, what is you single-most useful feature or trick? Clever vectorization? Data input/output? Visualization and graphics? Statistical analysis? Special functions? The interactive environment itself? One item per post, and we will see if we get a winner by means of votes. [Edit 25-Aug 2008]: So after one week, it seems that the simple str() won the poll. As I like to recommend that one myself, it is an easy answer to accept.

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  • How to cancel a jquery.load()?

    - by Dirk Jönsson
    I'd like to cancel a .load() operation, when the load() does not return in 5 seconds. If it's so I show an error message like 'sorry, no picture loaded'. What I have is... ...the timeout handling: jQuery.fn.idle = function(time, postFunction){ var i = $(this); i.queue(function(){ setTimeout(function(){ i.dequeue(); postFunction(); }, time); }); return $(this); }; ... initializing of the error message timeout: var hasImage = false; $('#errorMessage') .idle(5000, function() { if(!hasImage) { // 1. cancel .load() // 2. show error message } }); ... the image loading: $('#myImage') .attr('src', '/url/anypath/image.png') .load(function(){ hasImage = true; // do something... }); The only thing I could not figure out is how to cancel the running load() (if it's possible). Please help. Thanks! Edit: Another way: How do I prevent the .load() method to call it's callback function when it's returning?

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  • Twitter API with urllib2 in python

    - by Dirk Nachbar
    I want to use the Twitter API in Python to lookup user ids from name using the lookup method. I have done similar requests simply using response = urllib2.urlopen('http://search.twitter.com...') but for this one I need authentication. I don't think I can do it through the Google python twitter API because it doesn't have the lookup method. Any ideas how can I can auth with urllib2??

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  • VS 2010 Web.config transformations for debugging

    - by Dirk
    I’m a fan of the new VS 2010 Web.config transformations. I use this feature for deployment purposes and wondered if it is possible to use them for debugging too. I think of using them in the IDE: I want to create different built configuration (with linked transformation configurations); choose one of them; start the web site in the IDE and debug the different configuration this way.

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  • Invoking code both before and after WebControl.Render method

    - by Dirk
    I have a set of custom ASP.NET server controls, most of which derive from CompositeControl. I want to implement a uniform look for "required" fields across all control types by wrapping each control in a specific piece of HTML/CSS markup. For example: <div class="requiredInputContainer"> ...custom control markup... </div> I'd love to abstract this behavior in such a way as to avoid having to do something ugly like this in every custom control, present and future: public class MyServerControl : TextBox, IRequirableField { public IRequirableField.IsRequired {get;set;} protected override void Render(HtmlTextWriter writer){ RequiredFieldHelper.RenderBeginTag(this, writer) //render custom control markup RequiredFieldHelper.RenderEndTag(this, writer) } } public static class RequiredFieldHelper{ public static void RenderBeginTag(IRequirableField field, HtmlTextWriter writer){ //check field.IsRequired, render based on its values } public static void RenderEndTag(IRequirableField field, HtmlTextWriter writer){ //check field.IsRequired , render based on its values } } If I was deriving all of my custom controls from the same base class, I could conceivably use Template Method to enforce the before/after behavior;but I have several base classes and I'd rather not end up with really a convoluted class hierarchy anyway. It feels like I should be able to design something more elegant (i.e. adheres to DRY and OCP) by leveraging the functional aspects of C#, but I'm drawing a blank.

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  • Model View Presenter plus ASP.NET Web Service; where does the asmx live?

    - by Dirk
    I've been slowly transitioning from a traditional web forms architecture to the MVP pattern (Passive View). So far, it's been fairly easy to implement b/c the views I've dealt with have all employed a classic PostBack model. However, I've come across my first view that will refresh portions of itself via web services. I can't grok where the web service should live (Presenter I think) or how to expose that asmx end point to my View while still maintaining the clean separation of concerns/testability that MVP affords me. I've searched far and wide for some examples on how this might be implemented and have come up with nothing. Please help!

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  • Crystal Reports not included in Visual Studio 2010 – What are the consequences for the introduction

    - by Dirk
    Yesterday I stumbled over the information that Crystal Reports will no longer be included in Visual Studio 2010. Instead – it will be provided as a free download, but with a separate installation and a separate release date. According to the linked information the release of CR will be later than that of VS. My projects depend in parts on CR and I want to shift early to VS 2010. So there are some related questions: Can I use VS 2010 with the older 2008 version of CR? Do I need a workstation with a preinstalled VS 2008 or is the installation of the CR redistribution package sufficient to run that? Are there any experiences with the VS Beta concerning that?

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  • Is this a problem typically solved with IOC?

    - by Dirk
    My current application allows users to define custom web forms through a set of admin screens. it's essentially an EAV type application. As such, I can't hard code HTML or ASP.NET markup to render a given page. Instead, the UI requests an instance of a Form object from the service layer, which in turn constructs one using a several RDMBS tables. Form contains the kind of classes you would expect to see in such a context: Form= IEnumerable<FormSections>=IEnumerable<FormFields> Here's what the service layer looks like: public class MyFormService: IFormService{ public Form OpenForm(int formId){ //construct and return a concrete implementation of Form } } Everything works splendidly (for a while). The UI is none the wiser about what sections/fields exist in a given form: It happily renders the Form object it receives into a functional ASP.NET page. A few weeks later, I get a new requirement from the business: When viewing a non-editable (i.e. read-only) versions of a form, certain field values should be merged together and other contrived/calculated fields should are added. No problem I say. Simply amend my service class so that its methods are more explicit: public class MyFormService: IFormService{ public Form OpenFormForEditing(int formId){ //construct and return a concrete implementation of Form } public Form OpenFormForViewing(int formId){ //construct and a concrete implementation of Form //apply additional transformations to the form } } Again everything works great and balance has been restored to the force. The UI continues to be agnostic as to what is in the Form, and our separation of concerns is achieved. Only a few short weeks later, however, the business puts out a new requirement: in certain scenarios, we should apply only some of the form transformations I referenced above. At this point, it feels like the "explicit method" approach has reached a dead end, unless I want to end up with an explosion of methods (OpenFormViewingScenario1, OpenFormViewingScenario2, etc). Instead, I introduce another level of indirection: public interface IFormViewCreator{ void CreateView(Form form); } public class MyFormService: IFormService{ public Form OpenFormForEditing(int formId){ //construct and return a concrete implementation of Form } public Form OpenFormForViewing(int formId, IFormViewCreator formViewCreator){ //construct a concrete implementation of Form //apply transformations to the dynamic field list return formViewCreator.CreateView(form); } } On the surface, this seems like acceptable approach and yet there is a certain smell. Namely, the UI, which had been living in ignorant bliss about the implementation details of OpenFormForViewing, must possess knowledge of and create an instance of IFormViewCreator. My questions are twofold: Is there a better way to achieve the composability I'm after? (perhaps by using an IoC container or a home rolled factory to create the concrete IFormViewCreator)? Did I fundamentally screw up the abstraction here?

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  • Review of UPK Book

    - by ultan o'broin
    Better late than never, but my review of Dirk Manuel's UPK book was published in February. Oracle UPK - User Productivty Kit - is a cool tool for creating training material from the very environment users work in. An excellent accelerator to learning and reducing time spent reading manuals instead of productive activity! You can read more about UPK on the Oracle Web site.

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  • ArchBeat Link-o-Rama for 2012-09-05

    - by Bob Rhubart
    OTN Architect Day - Boston - Sept 12: What to Expect If you've never attended an OTN Architect Day, here's a little preview. You start with a continental breakfast. Then you have keynotes by an Oracle expert, and a member of the Oracle ACE community. After that come the break-out sessions, so you have your choice of two sessions in each time slot. So you'll get in two breakouts before lunch. Then you eat. After that there's a panel Q&A during which the audience tosses questions at the assembled session speakers. Then it's on to another set of break-out sessions, followed by a short break. Then the audience breaks into small groups for round table discussions. After that there's a drawing for some cool prizes, followed by the cocktail reception. All that costs you absolutely zero. Register now. Starting and Stopping Fusion Applications the Right Way | Ronaldo Viscuso While the fastartstop tool that ships with Oracle Fusion Applications does most of the work to start/stop/bounce the Fusion Apps environment, it does not do it all. Oracle Fusion Applications A-Team blogger Ronaldo Viscuso's post "aims to explain all tasks involved in starting and stopping a Fusion Apps environment completely." Dodeca Customer Feedback - The Rosewood Company | Tim Tow Oracle ACE Director Tim Tow shares anecdotal comments from one of his clients, a company that is deploying Dodeca to replace an aging VBA/Essbase application. Configuring UCM cache to check for external Content Server changes | Martin Deh Oracle WebCenter and ADF A-Team blogger Martin Deh shares the background information and the solution to a recently encountered customer scenario. Proxy As Upgrade to 11g Does Not Like NQSession.User | Art of Business Intelligence "In Oracle BI 10g the application was a lot more tolerant of bad design and cavalier usage of variables," observes Oracle ACE Christian Screen. "We noticed an issue recently during an upgrade where the Proxy As configuration in Oracle BI 10g used the NQSession.User variable to identify the user logged into Presentation Servers acting as Proxy." Oracle WebLogic Server 11g: Interactive Quick Reference | Dirk Nachbar Oracle ACE Dirk Nachbar shares a quick post with information on a new interactive reference guide to Oracle WebLogic Server. "The Quick Reference shows you an architecural overview of the Oracle WebLogic Server processes, tools, configuration files, log files and so on including a short description of each section and the corresponding link to the Oracle WebLogic Server Documentation," says Nachbar. Thought for the Day "In fast moving markets, adaptation is significantly more important than optimization." — Larry Constantine Source: Quotes for Software Engineers

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  • Le CEO d'AMD renvoyé sans ménagement, il aurait sous-estimé le marché des appareils mobiles

    Le CEO d'AMD renvoyé sans ménagement, il aurait sous-estimé le marché des appareils mobiles Dirk Meyer, patron d'AMD, a été éjecté de la direction de l'entreprise de façon brutale. Les raisons de ce départ subite étaient floues, mais les langues commencent à se délier. Ainsi, des cadres de la compagnie déclarent que le gros problème venait de l'apathie du CEO en termes de stratégie mobile. Il aurait ainsi raté le coche du boom de ce marché, en refusant notamment de construire des puces pour d'autres appareils nomades que les netbooks. Les parts d'AMD se seraient récemment effondrées de 9%, ce qui aurait précipité ce renvoi. L'homme affirmait que la priorité du groupe, c'était d'être en compétition avec le gros poisso...

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  • Oracle Linux at DOAG 2012 Conference in Nuremberg, Germany (Nov 20th-22nd)

    - by Lenz Grimmer
    This week, the DOAG 2012 Conference, organized by the German Oracle Users Group (DOAG) takes place in Nuremberg, Germany from Nov. 20th-22nd. There will be several presentations related to Oracle Linux, Oracle VM and related infrastructure (including a dedicated MySQL stream on Tue+Wed). Here are a few examples picked from the infrastructure stream of the schedule: Tuesday, Nov. 20th 10:00 - Virtualisierung, Cloud und Hosting - Kriterien und Entscheidungshilfen - Harald Sellmann, its-people Frankfurt GmbH, Andreas Wolske, managedhosting.de GmbH 14:00 - Virtual Desktop Infrastructure Implementierungen und Praxiserfahrungen - Björn Rost, portrix Systems GmbH 15:00 - Oracle Linux - Best Practices und Nutzen (nicht nur) für die Oracle DB - Manuel Hoßfeld, Lenz Grimmer, Oracle Deutschland 16:00 - Mit Linux Container Umgebungen effizient duplizieren - David Hueber, dbi services sa Wednesday, Nov. 21st 09:00 - OVM 3 Features und erste Praxiserfahrungen - Dirk Läderach, Robotron Datenbank-Software GmbH 09:00 - Oracle VDI Best Practice unter Linux - Rolf-Per Thulin, Oracle Deutschland 10:00 - Oracle VM 3: Was nicht im Handbuch steht... - Martin Bracher, Trivadis AG 12:00 - Notsystem per Virtual Box - Wolfgang Vosshall, Regenbogen AG 13:00 - DTrace - Informationsgewinnung leicht gemacht - Thomas Nau, Universität Ulm 13:00 - OVM x86 / OVM Sparc / Zonen und co. - Bertram Dorn, Oracle Deutschland Thursday, Nov. 22nd 09:00 - Oracle VM 3.1 - Wie geht's wirklich? - Manuel Hoßfeld, Oracle Deutschland, Sebastian Solbach, Oracle Deutschland 13:00 - Unconference: Oracle Linux und Unbreakable Enterprise Kernel - Lenz Grimmer, Oracle Deutschland 14:00 - Experten-Panel OVM 3 - Björn Bröhl, Robbie de Meyer, Oracle Corporation 14:00 - Wie patcht man regelmäßig mehrere tausend Systeme? - Sylke Fleischer, Marcel Pinnow, DB Systel GmbH 16:00 - Wo kommen denn die kleinen Wolken her? OVAB in der nächsten Generation - Marcus Schröder, Oracle Deutschland On a related note: if you speak German, make sure to subscribe to OLIVI_DE - Oracle LInux und VIrtualisierung - a German blog covering topics around Oracle Linux, Virtualization (primarily with Oracle VM) as well as Cloud Computing using Oracle Technologies. It is maintained by Manuel Hoßfeld and Sebastian Solbach (Sales Consultants at Oracle Germany) and will also include guest posts by other authors (including yours truly).

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  • Opitz Consulting wins the Oracle SOA Partner Community Award

    - by Jürgen Kress
    Thanks for the nice post! Ein wichtiger Preis für die SOA-Community: Der Oracle EMEA SOA Community Award Im Rahmen der Oracle Open World verlieh Oracle den „Oracle EMEA SOA Community Award" im Bereich "Outstanding Contribution“ im Jahr 2010 bereits zum dritten Mal in Folge an OPITZ CONSULTING: Award als erster SOA Specialized Partner in Europa In 2010 errangen die SOA-Spezialisten von OPITZ CONSULTING den begehrten SOA Partner Community Award. Das Oracle SOA-Team um Jürgen Kress honoriert hiermit das Erreichen der ersten Oracle SOA Spezialisierung in Deutschland, die Community-Arbeit, das Durchführen von SOA-Trainings (auch für anderen Oracle Partner) und das allgemeine Wachstum des OPITZ CONSULTING SOA-Bereichs. Verbindung von EA, BPM und SOA gewürdigt Im Jahr 2009 wurde ein OPITZ CONSULTING Direktor Strategie & Innovation geehrt: Dirk Stähler (Bild li.) erhielt den Award für sein Engagement im Aufbau und der Weiterentwicklung von BPM- und SOA-Themen. Ein besonderer Grund für die Verleihung an ihn waren seine Arbeiten zur effektiven Verbindung von Enterprise Architecture, Business Process Management und SOA. Award für SOA-Community-Arbeit und -Publikationen OPITZ CONSULTING Direktor Strategie & Innovation und Oracle ACE Director, Torsten Winterberg (Bild re.), holte diesen Preis im Jahr 2008 für OPITZ CONSULTING nach Deutschland. Er wurde für sein außerordentliches Engagement in der Etablierung von serviceorientierten Architekturen gewürdigt. Dazu gehören beispielsweise der Aufbau einer Special Interest Group SOA, Roundtable-Initiativen sowie umfangreiche Veröffentlichungen zu SOA.   For more information on the SOA Partner Community please feel free to register at www.oracle.com/goto/emea/soa (OPN account required) Blog Twitter LinkedIn Mix Forum Wiki Website Technorati Tags: SOA Community,Opitz,Opitz Consulting,Torsten Winterberginterberg,oracle,opn,Jürgen Kress

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  • 2-legged OAuth and the Gmail atom feed

    - by jdcotter
    We're trying to get 2-legged OAuth to work with the Gmail atom feed. We're using the Java library contributed by John Kristian, Praveen Alavilli and Dirk Balfanz. [http://oauth.net/code/] instead of the GData library. We know we have the correct CONSUMER_KEY and CONSUMER_SECRET, etc. becuase it works with the Contacts feed (http://www.google.com/m8/feeds/contacts/default/full) and have no problems. However with Gmail atom feed it always returns: HTTP/1.1 401 Unauthorized Any ideas? Should we try a different OAuth framework or does the problem lie on the Google side?

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  • Why does by iPhone App cannot load NSURL when linked against iPhone OS SDK 4.0 and run on iPhone OS

    - by Tichel
    I have an iPhone App linked against iPhone SDK 4.0 but as deployment target I selected OS 3.1. When I start the application on my iPod touch running 3.1.3 I get an error that the class NSURL cannot be found: dyld: Symbol not found: _OBJC_CLASS_$_NSURL Referenced from: /var/mobile/Applications/21ECAA8E-8777-4020-82F5-56C510D0AEAE/myTracks4iPhoneOS.app/myTracks4iPhoneOS Expected in: /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /var/mobile/Applications/21ECAA8E-8777-4020-82F5-56C510D0AEAE/myTracks4iPhoneOS.app/myTracks4iPhoneOS Data Formatters temporarily unavailable, will re-try after a 'continue'. (Not safe to call dlopen at this time.) mi_cmd_stack_list_frames: Not enough frames in stack. mi_cmd_stack_list_frames: Not enough frames in stack. When I declare CoreFoundation as weak framework then I am able to start the App. But the class NSURL itself does not work. Any idea? Thanks, Dirk

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