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  • resolving overloads in boost.python

    - by swarfrat
    I have a C++ class like this: class ConnectionBase { public: ConnectionBase(); template <class T> Publish(const T&); private: virtual void OnEvent(const Overload_a&) {} virtual void OnEvent(const Overload_b&) {} }; My templates & overloads are a known fixed set of types at compile time. The application code derives from ConnectionBase and overrides OnEvent for the events it cares about. I can do this because the set of types is known. OnEvent is private because the user never calls it, the class creates a thread that calls it as a callback. The C++ code works. I have wrapped this in boost.python, I can import it and publish from python. I want do create the equivalent of the following in python : class ConnectionDerived { public: ConnectionDerived(); private: virtual void OnEvent(const Overload_b&) { // application code } }; But ... since python isn't typed, and all the boost.python examples I've seen dealing with internals are on the C++ side, I'm a little puzzled as to how to do this. How do I override specific overloads?

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  • Changing Windows public folder in batch script.

    - by Angus
    I've installed Steam on an external hard drive so I can play games on different computers by just moving the drive around. Since save games are often saved in My Documents or AppData, but I want them to move with the external hard drive, I wrote a batch file that sets environment variables before starting steam. setocal set USERPROFILE=%EXTERNAL_LETTER%\Profile\Me set APPDATA=%USERPROFILE%\AppData\Roaming ... start %TARGETAPP% endlocal I'm not sure if this is the right way to do this on Windows, but it seems to work. However, one game saves its games in the Shared Documents folder. I've tried setting %PUBLIC% and %ALLUSERSPROFILE% but that does not seem to affect where the game looks. Is it possible to make this one program use a different Shared Documents folder, either by environment variables or some other means? The change in Shared Documents should only affect the one program, I do not want it to be a permanent or system wide change to Windows.

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  • Centering Div in the middle of the page

    - by shinjuo
    What is the best way to center the entire page in the middle of the web browser? <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> <title>test.html</title> <style type="text/css"> .testimonials_png { position: absolute; left:20px; top:397px; width:220px; height:395px; background: url("test_files/testimonials.png") no-repeat; } .homeLink_png { position: absolute; left:-1px; top:243px; width:203px; height:75px; background: url("test_files/homeLink.png") no-repeat; } .sidingLink_png { position: absolute; left:202px; top:243px; width:180px; height:75px; background: url("test_files/sidingLink.png") no-repeat; } .windowsLink_png { position: absolute; left:382px; top:243px; width:181px; height:75px; background: url("test_files/windowsLink.png") no-repeat; } .roofingLink_png { position: absolute; left:563px; top:243px; width:183px; height:75px; background: url("test_files/roofingLink.png") no-repeat; } .aboutLink_png { position: absolute; left:746px; top:243px; width:205px; height:75px; background: url("test_files/aboutLink.png") no-repeat; } .banner_png { position: absolute; left:0px; top:0px; width:950px; height:243px; background: url("test_files/banner.png") no-repeat; } </style> </head> <body> <div class="testimonials_png"> </div> <div class="homeLink_png"> </div> <div class="sidingLink_png"> </div> <div class="windowsLink_png"> </div> <div class="roofingLink_png"> </div> <div class="aboutLink_png"> </div> <div class="banner_png"> </div> </body> </html>

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  • Configuring hibernate.reveng.xml to detect a sequence PK generator with hibernate3-maven-plugin and

    - by mmm
    Hi, is there a way to configure hibernate3-maven-plugin so that a sequence generator is detected for a primary-key? I'm using a bottom-up approach for hibernate configuration (which means letting hibernate-tools generate the hibernate configuration using a jdbc-connection for you via reverse-engineering on an existing database schema). I've read this, but also this already (those two can be unrelated, but can also leave a hint). My hibernate.reveng.xml is the following: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-reverse-engineering SYSTEM "http://hibernate.sourceforge.net/hibernate-reverse-engineering-3.0.dtd" > <hibernate-reverse-engineering> <table name="ORDERS"> <primary-key> <!-- setting up a specific id generator for a table --> <generator class="sequence"> <param name="sequence">ORDERS_ORDER_ID_seq</param> </generator> <key-column name="ORDER_ID"/> </primary-key> </table> </hibernate-reverse-engineering> And I'm expecting it to generate an Orders.hbm.xml file like this: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2010-06-06 18:55:42 by Hibernate Tools 3.2.2.GA --> <hibernate-mapping> <class name="some.package.Orders" table="orders" schema="public"> <id name="orderId" type="long"> <column name="order_id" /> <generator class="sequence"> <param name="sequence">ORDERS_ORDER_ID_seq</param> </generator> </id> ... </class> </hibernate-mapping> ...but receiving this instead: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2010-06-06 18:55:42 by Hibernate Tools 3.2.2.GA --> <hibernate-mapping> <class name="some.package.Orders" table="orders" schema="public"> <id name="orderId" type="long"> <column name="order_id" /> <generator class="assigned" /> </id> ... </class> </hibernate-mapping> I know my hibernate.reveng.xml is being read by hibernate3-maven-plugin, as I experience maven errors whenever syntax errors appear in the file, so pom.xml seems to be correct and hibernate.reveng.xml syntactically correct. Any clues?

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  • Is Microformat's date-value-pattern fully accessible?

    - by Stephen
    Has there been an announcement (outside microformats.org) that the value-class-pattern is fully accessible? e.g. given <abbr class="value" title="2008-06-24">this Tuesday</abbr>, will a screen reader say "24 June 2008" or will it say "2008 dash 6 dash 24"? History Microformats came along, and were great, except that dates etc were stored in abbr tags: <abbr class="dtstart" title="20070312T1700-06"> March 12, 2007 at 5 PM, Central Standard Time </abbr>` This lead to screen readers doing ridiculous things as noted in hAccessibility. Now that microformats.org have released the value-class-pattern it's a lot better. But I'm left unable to find a declaration from WaSP (or another accessibility source not directly tied to microformats) that declaratively states that they are now accessible to screen readers etc.

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  • IoC and dataContext disposing in asp.net mvc 2 application

    - by zerkms
    I have the Global.asax like the code below: public class MvcApplication : System.Web.HttpApplication { public static void RegisterRoutes(RouteCollection routes) { // .... } protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); ControllerBuilder.Current.SetControllerFactory(typeof(IOCControllerFactory)); } } public class IOCControllerFactory : DefaultControllerFactory { private readonly IKernel kernel; public IOCControllerFactory() { kernel = new StandardKernel(new NanocrmContainer()); } protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType) { if (controllerType == null) return base.GetControllerInstance(requestContext, controllerType); var controller = kernel.TryGet(controllerType) as IController; if (controller == null) return base.GetControllerInstance(requestContext, controllerType); var standartController = controller as Controller; if (standartController is IIoCController) ((IIoCController)standartController).SetIoc(kernel); return standartController; } class NanocrmContainer : Ninject.Modules.NinjectModule { public override void Load() { // ... Bind<DomainModel.Entities.db>().ToSelf().InRequestScope().WithConstructorArgument("connection", "Data Source=lims;Initial Catalog=nanocrm;Persist Security Info=True;User ID=***;Password=***"); } } } In this case if somewhere it is the class, defined like: public class UserRepository : IUserRepository { private db dataContext; private IUserGroupRepository userGroupRepository; public UserRepository(db dataContext, IUserGroupRepository userGroupRepository) { this.dataContext = dataContext; this.userGroupRepository = userGroupRepository; } } then the dataContext instance is created (if no one was created in this request scope) by Ninject. So the trouble now is - where to invoke dataContext method .Dispose()?

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  • Statically Compiling QWebKit 4.6.2

    - by geeko
    I tried to compile Qt+Webkit statically with MS VS 2008 and this worked. C:\Qt\4.6.2configure -release -static -opensource -no-fast -no-exceptions -no-accessibility -no-rtti -no-stl -no-opengl -no-openvg -no-incredibuild-xge -no-style-plastique -no-style-cleanlooks -no-style-motif -no-style-cde -no-style-windowsce -no-style-windowsmobile -no-style-s60 -no-gif -no-libpng -no-libtiff -no-libjpeg -no-libmng -no-qt3support -no-mmx -no-3dnow -no-sse -no-sse2 -no-iwmmxt -no-openssl -no-dbus -platform win32-msvc2008 -arch windows -no-phonon -no-phonon-backend -no-multimedia -no-audio-backend -no-script -no-scripttools -webkit -no-declarative However, I get these errors whenever building a project that links statically to QWebKit: 1 Creating library C:\Users\Geeko\Desktop\Qt\TestQ\Release\TestQ.lib and object C:\Users\Geeko\Desktop\Qt\TestQ\Release\TestQ.exp 1QtWebKit.lib(PluginPackageWin.obj) : error LNK2019: unresolved external symbol _VerQueryValueW@16 referenced in function "class WebCore::String __cdecl WebCore::getVersionInfo(void * const,class WebCore::String const &)" (?getVersionInfo@WebCore@@YA?AVString@1@QAXABV21@@Z) 1QtWebKit.lib(PluginPackageWin.obj) : error LNK2019: unresolved external symbol _GetFileVersionInfoW@16 referenced in function "private: bool __thiscall WebCore::PluginPackage::fetchInfo(void)" (?fetchInfo@PluginPackage@WebCore@@AAE_NXZ) 1QtWebKit.lib(PluginPackageWin.obj) : error LNK2019: unresolved external symbol _GetFileVersionInfoSizeW@8 referenced in function "private: bool __thiscall WebCore::PluginPackage::fetchInfo(void)" (?fetchInfo@PluginPackage@WebCore@@AAE_NXZ) 1QtWebKit.lib(PluginDatabaseWin.obj) : error LNK2019: unresolved external symbol _imp_PathRemoveFileSpecW@4 referenced in function "class WebCore::String __cdecl WebCore::safariPluginsDirectory(void)" (?safariPluginsDirectory@WebCore@@YA?AVString@1@XZ) 1QtWebKit.lib(PluginDatabaseWin.obj) : error LNK2019: unresolved external symbol _imp_SHGetValueW@24 referenced in function "void __cdecl WebCore::addWindowsMediaPlayerPluginDirectory(class WTF::Vector &)" (?addWindowsMediaPlayerPluginDirectory@WebCore@@YAXAAV?$Vector@VString@WebCore@@$0A@@WTF@@@Z) 1QtWebKit.lib(PluginDatabaseWin.obj) : error LNK2019: unresolved external symbol _imp_PathCombineW@12 referenced in function "void __cdecl WebCore::addMacromediaPluginDirectories(class WTF::Vector &)" (?addMacromediaPluginDirectories@WebCore@@YAXAAV?$Vector@VString@WebCore@@$0A@@WTF@@@Z) 1C:\Users\Geeko\Desktop\Qt\TestQ\Release\TestQ.exe : fatal error LNK1120: 6 unresolved externals Do I need to check something in the Qt project options ? I have QtCore, QtGui, Network and WebKit checked.

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  • How to CompareTo two Object without known about their real type

    - by Kamil
    I have to implement a one linked list but it should put object in appropriate position. Everything was OK when I use it in conjunction with specific class, but when I tried make it universal and argument of method insert was Object some problem appeared. When I want to input Object in right position I should use CompareTo method, but there isn't method in Object class! The problem is how to compare two object elements without known about their real types. Maybe I should use generic class type? But what about CompareTo? Or maybe combine with Element class and place CompareTo there? I suppose it is feasible. :) public void insert(Object o) { Element el = new Element(o); // initializing and setting iterators while(!it.isDone() && ((it.current().getValue())).CompareTo(o)<0) // it.current() returns Element of List { //move interators } //... }

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  • How does Unity.Resolve know which constructor to use?

    - by stiank81
    Given a class with several constructors - how can I tell Resolve which constructor to use? Consider the following example class: public class Foo { public Foo() { } public Foo(IBar bar) { Bar = bar; } public Foo(string name, IBar bar) { Bar = bar; Name = name; } public IBar Bar { get; set; } public string Name { get; set; } } If I want to create an object of type Foo using Resolve how will Resolve know which constructor to use? And how can I tell it to use the right one? Let's say I have a container with an IBar registered - will it understand that it should favor the constructor taking IBar? And if I specify a string too - will it use the (string, IBar) constructor? Foo foo = unityContainer.Resolve<Foo>(); And please ignore the fact that it would probably be easier if the class just had a single constructor...

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  • HtmlHelper Getting the route name

    - by Simon G
    Hi, I've created a html helper that adds a css class property to a li item if the user is on the current page. The helper looks like this: public static string MenuItem( this HtmlHelper helper, string linkText, string actionName, string controllerName, object routeValues, object htmlAttributes ) { string currentControllerName = ( string )helper.ViewContext.RouteData.Values["controller"]; string currentActionName = ( string )helper.ViewContext.RouteData.Values["action"]; var builder = new TagBuilder( "li" ); // Add selected class if ( currentControllerName.Equals( controllerName, StringComparison.CurrentCultureIgnoreCase ) && currentActionName.Equals( actionName, StringComparison.CurrentCultureIgnoreCase ) ) builder.AddCssClass( "active" ); // Add link builder.InnerHtml = helper.ActionLink( linkText, actionName, controllerName, routeValues, htmlAttributes ); // Render Tag Builder return builder.ToString( TagRenderMode.Normal ); } I want to expand this class so I can pass a route name to the helper and if the user is on that route then it adds the css class to the li item. However I'm having difficulty finding the route the user is on. Is this possible? The code I have so far is: public static string MenuItem( this HtmlHelper helper, string linkText, string routeName, object routeValues, object htmlAttributes ) { string currentControllerName = ( string )helper.ViewContext.RouteData.Values["controller"]; string currentActionName = ( string )helper.ViewContext.RouteData.Values["action"]; var builder = new TagBuilder( "li" ); // Add selected class // Some code for here // if ( routeName == currentRoute ) AddCssClass; // Add link builder.InnerHtml = helper.RouteLink( linkText, routeName, routeValues, htmlAttributes ); // Render Tag Builder return builder.ToString( TagRenderMode.Normal ); } BTW I'm using MVC 1.0. Thanks

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  • How to implement login page using Spring Security so that it works with Spring web flow?

    - by simon
    I have a web application using Spring 2.5.6 and Spring Security 2.0.4. I have implemented a working login page, which authenticates the user against a web service. The authentication is done by defining a custom authentincation manager, like this: <beans:bean id="customizedFormLoginFilter" class="org.springframework.security.ui.webapp.AuthenticationProcessingFilter"> <custom-filter position="AUTHENTICATION_PROCESSING_FILTER" /> <beans:property name="defaultTargetUrl" value="/index.do" /> <beans:property name="authenticationFailureUrl" value="/login.do?error=true" /> <beans:property name="authenticationManager" ref="customAuthenticationManager" /> <beans:property name="allowSessionCreation" value="true" /> </beans:bean> <beans:bean id="customAuthenticationManager" class="com.sevenp.mobile.samplemgmt.web.security.CustomAuthenticationManager"> <beans:property name="authenticateUrlWs" value="${WS_ENDPOINT_ADDRESS}" /> </beans:bean> The authentication manager class: public class CustomAuthenticationManager implements AuthenticationManager, ApplicationContextAware { @Transactional @Override public Authentication authenticate(Authentication authentication) throws AuthenticationException { //authentication logic return new UsernamePasswordAuthenticationToken(principal, authentication.getCredentials(), grantedAuthorityArray); } The essential part of the login jsp looks like this: <c:url value="/j_spring_security_check" var="formUrlSecurityCheck"/> <form method="post" action="${formUrlSecurityCheck}"> <div id="errorArea" class="errorBox"> <c:if test="${not empty param.error}"> ${sessionScope["SPRING_SECURITY_LAST_EXCEPTION"].message} </c:if> </div> <label for="loginName"> Username: <input style="width:125px;" tabindex="1" id="login" name="j_username" /> </label> <label for="password"> Password: <input style="width:125px;" tabindex="2" id="password" name="j_password" type="password" /> </label> <input type="submit" tabindex="3" name="login" class="formButton" value="Login" /> </form> Now the problem is that the application should use Spring Web Flow. After the application was configured to use Spring Web Flow, the login does not work anymore - the form action to "/j_spring_security_check" results in a blank page without error message. What is the best way to adapt the existing login process so that it works with Spring Web Flow?

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  • Is it possible to create static classes in PHP (like in C#)?

    - by aleemb
    I want to create a static class in PHP and have it behave like it does in C#, so Constructor is automatically called on the first call to the class No instantiation required Something of this sort... static class Hello { private static $greeting = 'Hello'; private __construct() { $greeting .= ' There!'; } public static greet(){ echo $greeting; } } Hello::greet(); // Hello There!

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  • How to select form input based on label inner HTML?

    - by Shane
    I have multiple forms that are dynamically created with different input names and id's. The only thing unique they will have is the inner HTML of the label. Is it possible to select the input via the label inner HTML with jQuery? Here is an example of one of my patient date of birth blocks, there are many and all unique except for innerHTML. <div class="iphorm-element-spacer iphorm-element-spacer-text iphorm_1_8-element-spacer"> <label for="iphorm_081a9e2e6b9c83d70496906bb4671904150cf4b43c0cb1_8">events=Object { mouseover=[1], mouseout=[1]}handle=function()data=Object { InFieldLabels={...}} Patient DOB <span class="iphorm-required">*</span> </label> <div class="iphorm-input-wrap iphorm-input-wrap-text iphorm_1_8-input-wrap"> <input id="iphorm_081a9e2e6b9c83d70496906bb4671904150cf4b43c0cb1_8" class="iphorm-element-text iphorm_1_8" type="text" value="" name="iphorm_1_8">events=Object { focus=[1], blur=[1], keydown=[1], more...}handle=function() </div> <div class="iphorm-errors-wrap iphorm-hidden"> </div> This is in a Wordpress Plugin and because we are building to allow employees to edit their sites (this is actually a Wordpress Network), we do not want to alter the plugin if possible. Note that the label "for" and the input "id" share the same dynamic key, so this might be a way to maybe get the id, but wanted to see if there is a shorter way of doing this.

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  • Why isn't django-nose running the doctests in my models?

    - by Conley Owens
    I'm trying to use doctests with django-nose. All my doctests are running, except not any doctests within a model (unless it is abstract). class TestModel1(models.Model): """ >>> print 'pass' pass """ pass class TestModel2(models.Model): """ >>> print 'pass' pass """ class Meta: abstract = True pass The first doctest does not run and the second does. Why is this?

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  • Using string constants in implicit conversion

    - by kornelijepetak
    Consider the following code: public class TextType { public TextType(String text) { underlyingString = text; } public static implicit operator String(TextType text) { return text.underlyingString; } private String underlyingString; } TextType text = new TextType("Something"); String str = text; // This is OK. But I want to be able do the following, if possible. TextType textFromStringConstant = "SomeOtherText"; I can't extend the String class with the TextType implicit operator overload, but is there any way to assign a literal string to another class (which is handled by a method or something)? String is a reference type so when they developed C# they obviously had to use some way to get a string literal to the class. I just hope it's not hardcoded into the language.

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  • RDF correct approach to subClassOf

    - by Macarse
    I am learning RDF. What's the difference between this two approaches: a) <?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:tur="http://www.blah.com/turismo#"> <rdf:Description rdf:about="http://www.blah.com/turismo#plaza"> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/> </rdf:Description> <rdf:Description rdf:about="http://www.blah.com/turismo#plazaSinFuente"> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/> <rdfs:subClassOf rdf:resource="http://www.blah.com/turismo#plaza"/> </rdf:Description> b) <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:tur="http://www.blah.com/turismo#"> <rdfs:Class rdf:ID="plaza"/> <rdfs:Class rdf:ID="plazaSinFuente"> <rdfs:subClassOf rdf:resource="#plaza"/> </rdfs:Class>

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  • unittest tests reuse for family of classes

    - by zaharpopov
    I have problem organizing my unittest based class test for family of tests. For example assume I implement a "dictionary" interface, and have 5 different implementations want to testing. I do write one test class that tests a dictionary interface. But how can I nicely reuse it to test my all classes? So far I do ugly: DictType = hashtable.HashDict In top of file and then use DictType in test class. To test another class I manually change the DictType to something else. How can do this otherwise? Can't pass arguments to unittest classes so is there a nicer way?

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  • Rhino Mocks verify a private method is called from a public method

    - by slowcelica
    I have been trying to figure this one out, how do i test that a private method is called with rhino mocks with in the class that I am testing. So my class would be something like this. Public class Foo { public bool DoSomething() { if(somevalue) { //DoSomething; } else { ReportFailure("Failure"); } } private void ReportFailure(string message) { //DoSomeStuff; } } So my unit test is on class Foo and method DoSomething() I want to check and make sure that a certain message is passed to ReportFailure if somevalue is false, using rhino mocks.

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  • Qt - drag and drop with graphics view framework

    - by David Davidson
    I'm trying to make a simple draggable item using the graphics framework. Here's the code for what I did so far: Widget class: class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); }; Widget::Widget(QWidget *parent) : QWidget(parent) { DragScene *scene = new DragScene(); DragView *view = new DragView(); QHBoxLayout *layout = new QHBoxLayout(); DragItem *item = new DragItem(); view->setAcceptDrops(true); scene->addItem(item); view->setScene(scene); layout->addWidget(view); this->setLayout(layout); } Widget::~Widget() { } DragView class: class DragView : public QGraphicsView { public: DragView(QWidget *parent = 0); }; DragView::DragView(QWidget *parent) : QGraphicsView(parent) { setRenderHints(QPainter::Antialiasing); } DragScene class: class DragScene : public QGraphicsScene { public: DragScene(QObject* parent = 0); protected: void dragEnterEvent(QGraphicsSceneDragDropEvent *event); void dragMoveEvent(QGraphicsSceneDragDropEvent *event); void dragLeaveEvent(QGraphicsSceneDragDropEvent *event); void dropEvent(QGraphicsSceneDragDropEvent *event); }; DragScene::DragScene(QObject* parent) : QGraphicsScene(parent) { } void DragScene::dragEnterEvent(QGraphicsSceneDragDropEvent *event){ } void DragScene::dragMoveEvent(QGraphicsSceneDragDropEvent *event){ } void DragScene::dragLeaveEvent(QGraphicsSceneDragDropEvent *event){ } void DragScene::dropEvent(QGraphicsSceneDragDropEvent *event){ qDebug() << event->pos(); event->acceptProposedAction(); DragItem *item = new DragItem(); this->addItem(item); item->setPos(event->pos()); } DragItem class: class DragItem : public QGraphicsItem { public: DragItem(QGraphicsItem *parent = 0); QRectF boundingRect() const; void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0); protected: void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event); void mouseMoveEvent(QGraphicsSceneMouseEvent *event); void mousePressEvent(QGraphicsSceneMouseEvent *event); void mouseReleaseEvent(QGraphicsSceneMouseEvent *event); }; DragItem::DragItem(QGraphicsItem *parent) : QGraphicsItem(parent) { setFlag(QGraphicsItem::ItemIsMovable); } QRectF DragItem::boundingRect() const{ const QPointF *p0 = new QPointF(-10,-10); const QPointF *p1 = new QPointF(10,10); return QRectF(*p0,*p1); } void DragItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget){ if(painter == 0) painter = new QPainter(); painter->drawEllipse(QPoint(0,0),10,10); } void DragItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event){ } void DragItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event){ } void DragItem::mousePressEvent(QGraphicsSceneMouseEvent *event){ QMimeData* mime = new QMimeData(); QDrag* drag = new QDrag(event->widget()); drag->setMimeData(mime); drag->exec(); } void DragItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event){ } main.cpp instantiates a Widget and shows it. When I try to drag the circle, the app just creates another circle over the original one, regardless of where I release the drag. qDebug() in DragScene's dropEvent() shows QPointF(0,0) everytime the drag ends. I'm having a hard time trying to understand exactly what I have to do, which classes I should subclass, which methods needs to be overriden, to make this work. The documentation on this isn't very detailed. I'd like to know how to make this work, and if there's some other, more comprehensive resource to learn about the graphics view framework, besides the official documentation (which is excellent btw, but it would be great if there was a more detailed treatise on the subject). EDIT: Following badgerr's advice, I replaced item-pos() in DragScene::dropEvent() with item-scenePos(), now the drop event creates a new circle in the drop site, which is more or less what I wanted. But the original circle is still in place, and while the drag is in progress, the item doesn't follow the mouse cursor. The QGraphicsSceneDragDropEvent documentation says that pos() should return the cursor position in relation to the view that sent the event, which, unless I got it wrong, shouldn't be (0,0) all the time. Weird. I've read in a forum post that you can use QDrag::setPixMap() to show something during the drag, and in examples I've seen pictures being set as pixmaps, but how do I make the pixmap just like the graphics item I'm supposed to be dragging?

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  • Django loading mysql data into template correctly

    - by user805981
    I'm new to django and I'm trying to get display a list of buildings and sort them alphabetically, then load it into an html document. Is there something that I am not doing correctly? below is models.py class Class(models.Model): building = models.CharField(max_length=20) class Meta: db_table = u'class' def __unicode__(self): return self.building below is views.py views.py def index(request): buildinglist = Class.objects.all().order_by('building') c = {'buildinglist': buildinglist} t = loader.get_template('index.html') return HttpResponse(t.render(c)) below is index.html index.html {% block content%} <h3>Buildings:</h3> <ul> {% for building in buildinglist %} <li> <a href='www.{% building %}.com'> # ex. www.searstower.com </li> {% endfor %} </ul> {% endblock %} Can you guys point me in the right direction? Thank you in advance guys! I appreciate your help very much.

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  • Create 2 connection pools using c3p0 in Jetty

    - by Mike
    Hello, I'm trying to set up a maven web project that runs Jetty. In this project, I need 2 JNDIs... my plan is to configure 2 connection pools using c3p0 in Jetty. So, I created WEB-INF/jetty-env.xml, and I have the following:- <Configure class="org.mortbay.jetty.webapp.WebAppContext"> <New id="ds1" class="org.mortbay.jetty.plus.naming.Resource"> <Arg>jdbc/ds1</Arg> <Arg> <New class="com.mchange.v2.c3p0.ComboPooledDataSource"> // ... JTDS to SQL Server - omitted for brevity </New> </Arg> </New> <New id="ds2" class="org.mortbay.jetty.plus.naming.Resource"> <Arg>jdbc/ds2</Arg> <Arg> <New class="com.mchange.v2.c3p0.ComboPooledDataSource"> // ... JTDS to Sybase - omitted for brevity </New> </Arg> </New> </Configure> When I run jetty, I get this exception:- May 14, 2010 1:16:56 PM com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager INFO: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> ... ... ... Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0" java.lang.LinkageError: net.sourceforge.jtds.jdbc.DefaultProperties at java.lang.ClassLoader.defineClassImpl(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:258) It seems to me that I can't create 2 connection pools using c3p0. If I remove either one of the connection pool, it worked. What am I doing wrong? How do I create 2 connection pools in Jetty? Thanks much.

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  • Blackberry read local properties file in project

    - by Dachmt
    Hi, I have a config.properties file at the root of my blackberry project (same place as Blackberry_App_Descriptor.xml file), and I try to access the file to read and write into it. See below my class: public class Configuration { private String file; private String fileName; public Configuration(String pathToFile) { this.fileName = pathToFile; try { // Try to load the file and read it System.out.println("---------- Start to read the file"); file = readFile(fileName); System.out.println("---------- Property file:"); System.out.println(file); } catch (Exception e) { System.out.println("---------- Error reading file"); System.out.println(e.getMessage()); } } /** * Read a file and return it in a String * @param fName * @return */ private String readFile(String fName) { String properties = null; try { System.out.println("---------- Opening the file"); //to actually retrieve the resource prefix the name of the file with a "/" InputStream is = this.getClass().getResourceAsStream(fName); //we now have an input stream. Create a reader and read out //each character in the stream. System.out.println("---------- Input stream"); InputStreamReader isr = new InputStreamReader(is); char c; System.out.println("---------- Append string now"); while ((c = (char)isr.read()) != -1) { properties += c; } } catch (Exception e) { } return properties; } } I call my class constructor like this: Configuration config = new Configuration("/config.properties"); So in my class, "file" should have all the content of the config.properties file, and the fileName should have this value "/config.properties". But the "name" is null because the file cannot be found... I know this is the path of the file which should be different, but I don't know what i can change... The class is in the package com.mycompany.blackberry.utils Thank you!

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  • Type 'xxx' is not defined, BC30002 error.

    - by devin M. arnold
    Hello, It is possible to create an instance of a C# class within a aspx.vb codebehind file? When I try this within the Page_Load event: Dim oFlow As New Flow(HttpContext.Current.Request) I get the Type 'Flow' is not defined. The Flow class itself is located here: App_Code/CSCode/Cust/Frm/Flow.cs There's no namespace associated with this class. Any suggestions would be greatly appreciated. cheers, devin

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  • Setting nested object to null when combobox has empty value

    - by Javi
    Hello, I have a Class which models a User and another which models his country. Something like this: public class User{ private Country country; //other attributes and getter/setters } public class Country{ private Integer id; private String name; //other attributes and getter/setters } I have a Spring form where I have a combobox so the user can select his country or can select the undefined option to indicate he doen't want to provide this information. So I have something like this: <form:select path="country"> <form:option value="">-Select one-</form:option> <form:options items="${countries}" itemLabel="name" itemValue="id"/> </form:select> In my controller I get the autopopulated object with the user information and I want to have country set to null when the "-Select one-" option has been selected. So I have set a initBinder with a custom editor like this: @InitBinder protected void initBinder(WebDataBinder binder) throws ServletException { binder.registerCustomEditor(Country.class, "country", new CustomCountryEditor()); } and my editor do something like this: public class CustomCountryEditor(){ @Override public String getAsText() { //I return the Id of the country } @Override public void setAsText(String str) { //I search in the database for a country with id = new Integer(str) //and set country to that value //or I set country to null in case str == null } } When I submit the form it works because when I have country set to null when I have selected "-Select one-" option or the instance of the country selected. The problem is that when I load the form I have a method like the following one to load the user information. @ModelAttribute("user") public User getUser(){ //loads user from database } The object I get from getUser() has country set to a specific country (not a null value), but in the combobox is not selected any option. I've debugged the application and the CustomCountryEditor works good when setting and getting the text, thoughgetAsText method is called for every item in the list "countries" not only for the "country" field. Any idea? Is there a better way to set null the country object when I select no country option in the combobox? Thanks

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  • More issues with IntelliJ 9.0.1 "Hello World" in Scala - Predef version 5.0 vs 4.1

    - by Alex R
    Any ideas what could cause this? Scala signature Predef has wrong version Expected 5.0 found: 4.1 in .... scala-library.jar I tried both versions 2.7.6 and 2.8 RC1 of scala-*.jar, the result was the same. JDK is 1.6.u20. UPDATE Today uninstalled IntelliJ 9.0.1, and installed 9.0.2 Early Availability, with the 4/14 stable version of the Scala plug-in. Then I setup a project from scratch through the wizards: new project from scratch JDK is 1.6.u20 accept the default (project) instead of global / module accept the download of Scala 2.8.0beta1 into project's lib folder Created a new class: object hello { def main(args: Array[String]) { println("hello: " + args); } } For my efforts, I now have a brand-new error :) Here it is: Scalac internal error: class java.lang.ClassNotFoundException [java.net.URLClassLoader$1.run(URLClassLoader.java:202), java.security.AccessController.doPrivileged(Native Method), java.net.URLClassLoader.findClass(URLClassLoader.java:190), java.lang.ClassLoader.loadClass(ClassLoader.java:307), sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301), java.lang.ClassLoader.loadClass(ClassLoader.java:248), java.lang.Class.forName0(Native Method), java.lang.Class.forName(Class.java:169), org.jetbrains.plugins.scala.compiler.rt.ScalacRunner.main(ScalacRunner.java:72)] Thanks

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