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  • Html.CheckBoxFor() checked problem in ASP.Net MVC 2

    - by inolen
    It doesn't seem that the Html.CheckBoxFor helper adds the correct "checked" attribute when rendering the HTML. I have a bool property rendered like so: <%= Html.CheckBoxFor(m => m.Visible) %> And the outputted HTML is this: <input type="checkbox" value="true" name="Visible" id="Visible"> Is there some particular reason it does not add the "checked" attribute when the value is true?

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  • XSLT modify node before applying template

    - by Grigory
    I have an XSL code that processes some nodes and if some condition is true, before doing apply-template select="." i need to modify current node(add and attribute). How can i add an attribute to the node before calling apply-template select=".", or it is not possible at all ?

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  • Prevent Negative numbers for Age without using client side validation.

    - by Deepak
    Hi People, I have an issue in Core java. Consider the Employee class having an attribute called age. class Employee{ private int age; public void setAge(int age); } My question is how do i restrict/prevent setAge(int age) method such that it accepts only positive numbers and it should not allow negative numbers, Note: This has to be done without using client side validation.how do i achieve it using Java/server side Validation only.The validation for age attribute should be handled such that no exception is thrown

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  • Problem persisting inheritance tree

    - by alaiseca
    I have a problem trying to map an inheritance tree. A simplified version of my model is like this: @MappedSuperclass @Embeddable public class BaseEmbedded implements Serializable { @Column(name="BE_FIELD") private String beField; // Getters and setters follow } @MappedSuperclass @Embeddable public class DerivedEmbedded extends BaseEmbedded { @Column(name="DE_FIELD") private String deField; // Getters and setters follow } @MappedSuperclass public abstract class BaseClass implements Serializable { @Embedded protected BaseEmbedded embedded; public BaseClass() { this.embedded = new BaseEmbedded(); } // Getters and setters follow } @Entity @Table(name="MYTABLE") @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name="TYPE", discriminatorType=DiscriminatorType.STRING) public class DerivedClass extends BaseClass { @Id @Column(name="ID", nullable=false) private Long id; @Column(name="TYPE", nullable=false, insertable=false, updatable=false) private String type; public DerivedClass() { this.embedded = new DerivedClass(); } // Getters and setters follow } @Entity @DiscriminatorValue("A") public class DerivedClassA extends DerivedClass { @Embeddable public static NestedClassA extends DerivedEmbedded { @Column(name="FIELD_CLASS_A") private String fieldClassA; } public DerivedClassA() { this.embedded = new NestedClassA(); } // Getters and setters follow } @Entity @DiscriminatorValue("B") public class DerivedClassB extends DerivedClass { @Embeddable public static NestedClassB extends DerivedEmbedded { @Column(name="FIELD_CLASS_B") private String fieldClassB; } public DerivedClassB() { this.embedded = new NestedClassB(); } // Getters and setters follow } At Java level, this model is working fine, and I believe is the appropriate one. My problem comes up when it's time to persist an object. At runtime, I can create an object which could be an instance of DerivedClass, DerivedClassA or DerivedClassB. As you can see, each one of the derived classes introduces a new field which only makes sense for that specific derived class. All the classes share the same physical table in the database. If I persist an object of type DerivedClass, I expect fields BE_FIELD, DE_FIELD, ID and TYPE to be persisted with their values and the remaining fields to be null. If I persist an object of type DerivedClass A, I expect those same fields plus the FIELD_CLASS_A field to be persisted with their values and field FIELD_CLASS_B to be null. Something equivalent for an object of type DerivedClassB. Since the @Embedded annotation is at the BaseClass only, Hibernate is only persisting the fields up to that level in the tree. I don't know how to tell Hibernate that I want to persist up to the appropriate level in the tree, depending on the actual type of the embedded property. I cannot have another @Embedded property in the subclasses since this would duplicate data that is already present in the superclass and would also break the Java model. I cannot declare the embedded property to be of a more specific type either, since it's only at runtime when the actual object is created and I don't have a single branch in the hierarchy. Is it possible to solve my problem? Or should I resignate myself to accept that there is no way to persist the Java model as it is? Any help will be greatly appreciated.

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  • Show/hide jQuery

    - by Banderdash
    Not much experience with JavaScript, hopefully one of you gurus can help. <div id="themes"> <h2>Research Themes</h2> <ul> <li><a href="">Learn about our approach to the <strong>environment</strong></a><span><a href="#">Expand</a></span></li> <ul class="tier_2 hide"> <li><a href="">Project name numero uno goes here</a></li> <li><a href="">Project name numero dos goes here</a></li> <li><a href="">Project name numero tres goes here</a></li> </ul> <li><a href="">Learn about our approach to <strong>human health</strong></a><span><a href="#">Expand</a></span></li> <ul class="tier_2 hide"> <li><a href="">Project name numero uno goes here</a></li> <li><a href="">Project name numero dos goes here</a></li> <li><a href="">Project name numero tres goes here</a></li> </ul> <li class="last"><a href="">Learn about our approach to <strong>national defense</strong></a><span><a href="#">Expand</a></span></li> <ul class="tier_2 hide"> <li><a href="">Project name numero uno goes here</a></li> <li><a href="">Project name numero dos goes here</a></li> <li><a href="">Project name numero tres goes here</a></li> </ul> </ul> </div><!-- // end themes --> This is my markup. As you can see under each of the first tier of li's there are ul's with classes of tier_2 and hide. I've been trying to create some simple jQuery that on click will remove the hide class from it's child ul, but at the same time check that no other ul's with class of tier_2 are shown (aka the other's have the hide class). This should keep a visitor from expanding so many items at once that it will make the layout look funky. Just not sure how to accomplish this, any ideas?

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  • No Method Error Undefined method 'save' for nil:NilClass

    - by BennyB
    I'm getting this error when i try to create a "Lecture" via my Lecture controller's create method. This used to work but i went on to work on other parts of the app & then of course i come back & something is now throwing this error when a user tries to create a Lecture in my app. I'm sure its something small i'm just overlooking (been at it a while & probably need to take a break)...but I'd appreciate if someone could let me know why this is happening...let me know if i need to post anything else...thx! The error I get NoMethodError in LecturesController#create undefined method `save' for nil:NilClass Rails.root: /Users/name/Sites/rails_projects/app_name Application Trace | Framework Trace | Full Trace app/controllers/lectures_controller.rb:13:in `create' My view to create a new Lecture views/lectures/new.html.erb <% provide(:title, 'Start a Lecture') %> <div class="container"> <div class="content-wrapper"> <h1>Create a Lecture</h1> <div class="row"> <div class="span 6 offset3"> <%= form_for(@lecture) do |f| %> <%= render 'shared/error_messages', :object => f.object %> <div class="field"> <%= f.text_field :title, :placeholder => "What will this Lecture be named?" %> <%= f.text_area :content, :placeholder => "Describe this Lecture & what will be learned..." %> </div> <%= f.submit "Create this Lecture", :class => "btn btn-large btn-primary" %> <% end %> </div> </div> </div> </div> Then my controller where its saying the error is coming from controllers/lectures_controller.rb class LecturesController < ApplicationController before_filter :signed_in_user, :only => [:create, :destroy] before_filter :correct_user, :only => :destroy def index end def new @lecture = current_user.lectures.build if signed_in? end def create if @lecture.save flash[:success] = "Lecture created!" redirect_to @lecture else @activity_items = [ ] render 'new' end end def show @lecture = Lecture.find(params[:id]) end def destroy @lecture.destroy redirect_to root_path end private def correct_user @lecture = current_user.lectures.find_by_id(params[:id]) redirect_to root_path if @lecture.nil? end

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  • jQuery question

    - by Fuxi
    hi all, i'm having the following string <img alt="over 40 world famous brandedWATCHES BRANDs to choose from " src="http://www.fastblings.com/images/logo.jpg"></strong></a><br> i want to define a regex pattern like <img alt="(.+?)" src="http://(.+?).(jpg|gif)"> but as u can see the target strings has a linebreak in the alt attribute - so how can i incorporate this? the rule should be like "anything in the alt-attribute including linebreaks" thx

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  • Appengine filter inequality and ordering fails

    - by davezor
    I think I'm overlooking something simple here, I can't imagine this is impossible to do. I want to filter by a datetime attribute and then order the result by a ranking integer attribute. When I try to do this: query.filter("submitted >=" thisweek).order("ranking") I get the following: BadArgumentError: First ordering property must be the same as inequality filter property, if specified for this query; received ranking, expected submitted Huh? What am I missing? Thanks.

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  • python `IN` module problem (FreeBSD)

    - by Shamanu4
    I'm trying to work with sockets and I have such problem In code example: setsockopt(socket.SOL_SOCKET,IN.SO_BINDTODEVICE,self.listen_address+'\0') I have error AttributeError: 'module' object has no attribute 'SO_BINDTODEVICE' On Linux machine this attribute is OK but on FreeBSD trere are no any SO_* attributes in module IN. What port should I install to resolve this problem on FreeBDS machine? Python versions on Linux tested: 2.5.4 and 2.6.4; on FreeBSD: 2.5.5 I can't find anything about this module in my book, and googling keyword IN looks like seamless ...

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  • Selenium: How to click buttons that use onclick window.location?

    - by Andrew
    I have a button (outside of a form) that redirects to another page using the onclick attribute that calls window.location to redirect the user to another page. This time I can't change the HTML. I am using Safari 4 for testing. How can I click a button that uses the onclick attribute and window.location to redirect using Safari 4 and Selenium RC PHPUnit Extension? Here's my HTML: <input type="button" onclick="window.location='/registrations/new'" value="Start a new registration" id="create">

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  • In chrome with a greasemonkey extension, how can I modify an `<a...>` construct to strip out the onc

    - by Ross Rogers
    I want to modify an internal webpage to strip away some of the onclick behavior of certain links. The internal webpage has a bunch of links like: <a href="/slm/detail/ar/3116370" onclick="rallyPorthole.showDetail('/ar/view.sp','3116370','pj/b');return false;">foo de fa fa</a> How can I do an extension to Chrome so it does the following: for link in all_links: if link's href attribute matches '/slm/detail/ar/...': remove the onclick attribute

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  • I'm having trouble traversing a newly appended DOM element with jQuery

    - by culov
    I have a form that I want to be used to add entries. Once an entry is added, the original form should be reset to prepare it for the next entry, and the saved form should be duplicated prior to resetting and appended onto a div for 'storedEntries.' This much is working (for the most part), but Im having trouble accessing the newly created form... I need to change the value attribute of the submit button from 'add' to 'edit' so properly communicate what clicking that button should do. heres my form: <div class="newTruck"> <form id="addNewTruck" class='updateschedule' action="javascript:sub(sTime.value, eTime.value, lat.value, lng.value, street.value);"> <b style="color:green;">Opening at: </b> <input id="sTime" name="sTime" title="Opening time" value="Click to set opening time" class="datetimepicker"/> <b style="color:red;">Closing at: </b> <input id="eTime" name= "eTime" title="Closing time" value="Click to set closing time" class="datetimepicker"/> <label for='street'>Address</label> <input type='text' name='street' id='street' class='text' autocomplete='off'/> <input id='submit' class='submit' style="cursor: pointer; cursor: hand;" type="submit" value='Add new stop'/> <div id='suggests' class='auto_complete' style='display:none'></div> <input type='hidden' name='lat' id='lat'/> <input type='hidden' name='lng' id='lng'/> ive tried using a hundred different selectors with jquery to no avail... heres my script as it stands: function cloneAndClear(){ var id = name+now; $j("#addNewTruck").clone(true).attr("id",id).appendTo(".scheduledTrucks"); $j('#'+id).filter('#submit').attr('value', 'Edit'); $j("#addNewTruck")[0].reset(); createPickers(); } the element is properly cloned and inserted into the div, but i cant find a way to access this element... the third line in the script never works. Another problem i am having is that the 'values' in the cloned form revert back to the value in the source of the html rather than what the user inputs. advice on how to solve either of these issues is greatly appreciated!

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  • Rails, destroy if blank

    - by Joseph Silvashy
    This might sound odd, but is there a 'Rails way' to have a model destroyed if a certain attribute is blank? Say I have a model like tags with just a name attribute or something, if the user edits the tag and deletes all the text out of the name field in the form I'd like the model to just be deleted. I'm aware of the reject_if method, but that doesn't seem to work.

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  • javascript accordian menu problem in worpress

    - by Praveen kalal
    hi all i am working on wordpress project there is i used accordion for right sidebar but all the link are over lapping each other in IE8 its working fine mozzila so plz help my code is var parentAccordion=new TINY.accordion.slider("parentAccordion"); parentAccordion.init("acc","h4",1,-1); var nestedAccordion=new TINY.accordion.slider("nestedAccordion"); nestedAccordion.init("nested","h4",1,-1,"acc-selected"); $args = array('parent'=>0,'hide_empty'=>0); $cats = get_categories($args); echo '<ul id="acc" class="acc">'; foreach($cats as $key => $val) { $args1=array( 'showposts' => 10, 'category__in' => array($val->term_id), 'caller_get_posts'=>1 ); $post=get_posts($args1); echo '<li><h4>'.$val->name.'</h4>'; echo '<div class="" style="opacity: 0; height: auto;">'; echo '<ul id="nested" class="acc">'; if(isset($post) && !empty($post)) { foreach($post as $key1 => $val1) { echo '<li class="cat-item"><a title='.$val1->post_title.' href='.$val1->guid.'>'.$val1->post_title.'</a>'; } } $subcats = get_categories(array('parent'=>$val->term_id,'hide_empty'=>0)); if(isset($subcats) && !empty($subcats)) { foreach($subcats as $k => $v) { echo '<li><h4 class="">'.$v->name.'</h4>'; $args2=array( 'showposts' => 10, 'category__in' => array($v->term_id), 'caller_get_posts'=>1 ); $post1=get_posts($args2); if(isset($post1) && !empty($post1)) { echo '<div class="" style="opacity: 1; height: auto;">'; echo '<ul class="children" style="padding-left:15px;">'; foreach($post1 as $key2 => $val2) { echo '<li><a title='.$val2->post_title.' href='.$val2->guid.'>'.$val2->post_title.'</a></li>'; } echo '</ul></div>'; } } } echo "</ul>"; echo "</li>"; } echo '</ul>'; ?> </div> so plz help me

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  • UIButton does not respond to touch events after changing its position using setFrame

    - by Pranathi
    I have a view controller class (child) which extends from view controller class (parent). In the parent class's loadView() method I create a sub-view (named myButtonView) with two buttons (buttons are horizontally laid out in the subview) and add it to the main view. In the subclass I need to shift these two buttons up by 50pixels. So, I am shifting the buttonView by calling the setFrame method. This makes the buttons shift and render properly but they do not respond to touch events after this. Buttons work properly in the views of Parent class type. In the child class type view also, if I comment out the setFrame() call the buttons work properly. How can I shift the buttons and still make them respond to touch events? Any help is appreciated. Following is snippets of the code. In the parent class: - (void)loadView { // Some code... CGRect buttonFrameRect = CGRectMake(0,yOffset+1,screenRect.size.width,KButtonViewHeight); myButtonView = [[UIView alloc]initWithFrame:buttonFrameRect]; myButtonView.backgroundColor = [UIColor clearColor]; [self.view addSubview:myButtonView]; // some code... CGRect nxtButtonRect = CGRectMake(screenRect.size.width - 110, 5, 100, 40); myNxtButton = [UIButton buttonWithType:UIButtonTypeCustom]; [myNxtButton setTitle:@"Submit" forState:UIControlStateNormal]; myNxtButton.frame = nxtButtonRect; myNxtButton.backgroundColor = [UIColor clearColor]; [myNxtButton addTarget:self action:@selector(nextButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; [myButtonView addSubview:myNxtButton]; CGRect backButtonRect = CGRectMake(10, 5, 100, 40); myBackButton = [UIButton buttonWithType:UIButtonTypeCustom]; [myBackButton setTitle:@"Back" forState:UIControlStateNormal]; myBackButton.frame = backButtonRect; myBackButton.backgroundColor = [UIColor clearColor]; [myBackButton addTarget:self action:@selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; [myButtonView addSubview:myBackButton]; // Some code... } In the child class: - (void)loadView { [super loadView]; //Some code .. CGRect buttonViewRect = myButtonView.frame; buttonViewRect.origin.y = yOffset; // This is basically original yOffset + 50 [myButtonView setFrame:buttonViewRect]; yOffset += KButtonViewHeight; // Add some other view below myButtonView .. }

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  • Cast IEnumerable<Inherited> To IEnumerable<Base>

    - by david2342
    I'm trying to cast an IEnumerable of an inherited type to IEnumerable of base class. Have tried following: var test = resultFromDb.Cast<BookedResource>(); return test.ToList(); But getting error: You cannot convert these types. Linq to Entities only supports conversion primitive EDM-types. The classes involved look like this: public partial class HistoryBookedResource : BookedResource { } public partial class HistoryBookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } public partial class BookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } [MetadataType(typeof(BookedResourceMetaData))] public partial class BookedResource { } public class BookedResourceMetaData { [Required(ErrorMessage = "Resource id is Required")] [Range(0, int.MaxValue, ErrorMessage = "Resource id is must be an number")] public object ResourceId { get; set; } [Required(ErrorMessage = "Date is Required")] public object DateFrom { get; set; } [Required(ErrorMessage = "Time From is Required")] public object TimeFrom { get; set; } [Required(ErrorMessage = "Time to is Required")] public object TimeTo { get; set; } } The problem I'm trying to solve is to get records from table HistoryBookedResource and have the result in an IEnumerable<BookedResource> using Entity Framework and LINQ. UPDATE: When using the following the cast seams to work but when trying to loop with a foreach the data is lost. resultFromDb.ToList() as IEnumerable<BookedResource>; UPDATE 2: Im using entity frameworks generated model, model (edmx) is created from database, edmx include classes that reprecent the database tables. In database i have a history table for old BookedResource and it can happen that the user want to look at these and to get the old data from the database entity framework uses classes with the same name as the tables to receive data from db. So i receive the data from table HistoryBookedResource in HistoryBookedResource class. Because entity framework generate the partial classes with the properties i dont know if i can make them virtual and override. Any suggestions will be greatly appreciated.

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  • functional, bind1st and mem_fun

    - by Neil G
    Why won't this compile? #include <functional> #include <boost/function.hpp> class A { A() { typedef boost::function<void ()> FunctionCall; FunctionCall f = std::bind1st(std::mem_fun(&A::process), this); } void process() {} }; Errors: In file included from /opt/local/include/gcc44/c++/bits/stl_function.h:712, from /opt/local/include/gcc44/c++/functional:50, from a.cc:1: /opt/local/include/gcc44/c++/backward/binders.h: In instantiation of 'std::binder1st<std::mem_fun_t<void, A> >': a.cc:7: instantiated from here /opt/local/include/gcc44/c++/backward/binders.h:100: error: no type named 'second_argument_type' in 'class std::mem_fun_t<void, A>' /opt/local/include/gcc44/c++/backward/binders.h:103: error: no type named 'first_argument_type' in 'class std::mem_fun_t<void, A>' /opt/local/include/gcc44/c++/backward/binders.h:106: error: no type named 'first_argument_type' in 'class std::mem_fun_t<void, A>' /opt/local/include/gcc44/c++/backward/binders.h:111: error: no type named 'second_argument_type' in 'class std::mem_fun_t<void, A>' /opt/local/include/gcc44/c++/backward/binders.h:117: error: no type named 'second_argument_type' in 'class std::mem_fun_t<void, A>' /opt/local/include/gcc44/c++/backward/binders.h: In function 'std::binder1st<_Operation> std::bind1st(const _Operation&, const _Tp&) [with _Operation = std::mem_fun_t<void, A>, _Tp = A*]': a.cc:7: instantiated from here /opt/local/include/gcc44/c++/backward/binders.h:126: error: no type named 'first_argument_type' in 'class std::mem_fun_t<void, A>' In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:13, from /opt/local/include/boost/function/detail/function_iterate.hpp:14, from /opt/local/include/boost/preprocessor/iteration/detail/iter/forward1.hpp:47, from /opt/local/include/boost/function.hpp:64, from a.cc:2: /opt/local/include/boost/function/function_template.hpp: In static member function 'static void boost::detail::function::void_function_obj_invoker0<FunctionObj, R>::invoke(boost::detail::function::function_buffer&) [with FunctionObj = std::binder1st<std::mem_fun_t<void, A> >, R = void]': /opt/local/include/boost/function/function_template.hpp:913: instantiated from 'void boost::function0<R>::assign_to(Functor) [with Functor = std::binder1st<std::mem_fun_t<void, A> >, R = void]' /opt/local/include/boost/function/function_template.hpp:722: instantiated from 'boost::function0<R>::function0(Functor, typename boost::enable_if_c<boost::type_traits::ice_not::value, int>::type) [with Functor = std::binder1st<std::mem_fun_t<void, A> >, R = void]' /opt/local/include/boost/function/function_template.hpp:1064: instantiated from 'boost::function<R()>::function(Functor, typename boost::enable_if_c<boost::type_traits::ice_not::value, int>::type) [with Functor = std::binder1st<std::mem_fun_t<void, A> >, R = void]' a.cc:7: instantiated from here /opt/local/include/boost/function/function_template.hpp:153: error: no match for call to '(std::binder1st<std::mem_fun_t<void, A> >) ()'

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  • What is the difference between these 2 XML LINQ Queries?

    - by Jon
    I have the 2 following LINQ queries and I haven't quite got my head around LINQ so what is the difference between the 2 approaches below? Is there a circumstance where one approach is better than another? ChequeDocument.Descendants("ERRORS").Where(x=>(string)x.Attribute("D") == "").Count(); (from x in ChequeDocument.Descendants("ERRORS") where (string)x.Attribute("D") == "" select x).Count())

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  • How do I access the enumerated item with an indexer and assign array string to it for display?

    - by g00p3k
    EDITED: Updated 3/23/09. See rest of post at bottom. I'm still having trouble with the indexer. Anymore help or examples would really help me out. Write a class, MyCourses, that contains an enumeration of all the courses that you are currently taking. This enum should be nested inside of your class MyCourses. Your class should also have an array field that provides a short description (as a String) of each of your courses. Write an indexer that takes one of your enumerated courses as an index and returns the String description of the course. Write a class MyFriends that contains an indexer that provides access to the names of your friends. namespace IT274_Unit4Project { public class MyCourses { // enumeration that contains an enumeration of all the courses that // student is currently enrolled in public enum CourseName {IT274= 0,CS210 = 1} // array field that provides short description for each of classes, // returns string description of the course private String[] courseDescription = {"Intermediate C#: Teaches intermediate elements of C# programming and software design", "Career Development Strategies: Teaches principles for career progression, resume preparation, and overall self anaylsis"}; // indexer that takes one of the enumerated courses as an index // and returns the String description of the course public String this[CourseName index] { get { if (index == 1) return courseDescription[0]; else return courseDescription[1]; } set { if (index == 1) courseDescription[0] = value; else courseDescription[1] = value; } } } }//end public class MyCourses I'm working on this homework project and having trouble understanding the text explaining how to correctly take the accessed value of the enumeration and then apply the string array value to it. Can you please help me understand this? The text we are using is very difficult and poorly written for a beginner to understand, so I'm kind of on my own here. I've got the first parts written, but need some help on the accessing of the enumeration value and assigning, i think i'm close, but don't understand how to properly get and set the values on this. Please do not provide me with direct code answers, unless a MSDN style explanation that is generalized and not specific to my project. ie: public class MyClass { string field1; string field2; //properties public string Value1 get etc... Thanks!

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  • Separation of domain and ui layer in a composite

    - by hansmaad
    Hi all, i'm wondering if there is a pattern how to separate the domain logic of a class from the ui responsibilities of the objects in the domain layer. Example: // Domain classes interface MachinePart { CalculateX(in, out) // Where do we put these: // Draw(Screen) ?? // ShowProperties(View) ?? // ... } class Assembly : MachinePart { CalculateX(in, out) subParts } class Pipe : MachinePart { CalculateX(in, out) length, diamater... } There is an application that calculates the value X for machines assembled from many machine parts. The assembly is loaded from a file representation and is designed as a composite. Each concrete part class stores some data to implement the CalculateX(in,out) method to simulate behaviour of the whole assembly. The application runs well but without GUI. To increase the usability a GUi should be developed on top of the existing implementation (changes to the existing code are allowed). The GUI should show a schematic graphical representation of the assembly and provide part specific dialogs to edit several parameters. To achieve these goals the application needs new functionality for each machine part to draw a schematic representation on the screen, show a property dialog and other things not related to the domain of machine simulation. I can think of some different solutions to implement a Draw(Screen) functionality for each part but i am not happy with each of them. First i could add a Draw(Screen) method to the MachinePart interface but this would mix-up domain code with ui code and i had to add a lot of functionality to each machine part class what makes my domain model hard to read and hard to understand. Another "simple" solution is to make all parts visitable and implement ui code in visitors but Visitor does not belong to my favorite patterns. I could derive UI variants from each machine part class to add the UI implementation there but i had to check if each part class is suited for inheritance and had to be careful on changes to the base classes. My currently favorite design is to create a parallel composite hierarchy where each component stores data to define a machine part, has implementation for UI methods and a factory method which creates instances of the corresponding domain classes, so that i can "convert" a UI assembly to a domain assembly. But there are problems to go back from the created domain hierarchy to the UI hierarchy for showing calculation results in the drawing for example (imagine some parts store some values during the calculation i want to show in the schematic representation after the simluation). Maybe there are some proven patterns for such problems?

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  • Javascript - proper getAttributeNode on IE6+

    - by Darrow
    I have a regular input box (no onchange attribute). <input type="text" id="bar" name="bar" /> For some reason, IE6+ does returns [object], while FF and Chrome returns null. if ((elem.getAttributeNode('onchange')) != null) elem.onchange(); I did also try as: if (typeof(elem.onchange) !== 'undefined') elem.onchange(); What would be the proper cross-browser way to check if the element has the attribute? Thanks

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  • jQuery - Show field based on value of a type-hidden on refresh.

    - by Sebhael
    Hello, I'm trying to create something in jQuery and having a bit of problems with it. I'm not too adept on the framework, so I'm sure this is all wrong. Anyways, the ultimate goal is a full form that contains 3 radio buttons - depending on the value of the button, a LI is shown. I have all of that done, but my problem is coming with validation. If something fails then the page is reloaded and the div that was selected doesn't show without clicking another radio first, then back to the original. This process is basically the same as someone came up with here. Here's what I got so far. HTML <li> <label> License (radio) </label> <label for="commercial" class="checkBox"> Commercial </label> <input type="radio" name="license" value="commercial" id="commercial" class="checkBox" <?php echo set_radio('license', 'commercial'); ?> /> <label for="abandonware" class="checkBox"> Abandonware </label> <input type="radio" name="license" value="abandonware" id="abandonware" class="checkBox" <?php echo set_radio('license', 'abandonware'); ?> /> <label for="freeware" class="checkBox"> Freeware </label> <input type="radio" name="license" value="freeware" id="freeware" class="checkBox" <?php echo set_radio('license', 'freeware'); ?> /> </li> This is followed by three LI's that contain id="commercial, abandonware, and freeware" and class="licenseli" My jQuery is, as said, something from here. $('li.licenseli').hide(); $('input[name=license]:radio').change(function(){ var Type = $(this).val(); // Get value of radio $('li.licenseli').slideUp(); // Hide non-selected $('li#'+Type).slideDown(); // Show Selected }); So what I need help with is I have a hidden input that retrieves the value of the radio box from validation - I want to take this value (or the radio's if possible?) and have the original selected option's LI already visible.

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  • What is a Managed Prototype?

    - by Vidar
    I just need clarification on what a managed prototype is. I think it is a method that uses the DLLImport attribute and has a method like so: [DllImport("user32.dll")] private static extern int MessageBox(IntPtr hWnd, String text, String caption, uint type); Does it always mean this i.e you must have a DLLImport attribute and then a method signiture which is a private static extern??? Cheers

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  • Codeigniter: Retrieving data on button click with Ajax

    - by OllyTenerife
    I have a simple webpage which generates a random quote from my database upon refreshing the page. I wish to implement some AJAX and JQuery in order to generate quotes via the button rather than having to refresh the page. I have done some research but I am not sure how to implement this in Codeigniter. My current code is below... Page controller: public function index() { $this->load->model('quote_model', '', TRUE); $data['quotes'] = $this->quote_model->getRandom(); $this->load->view('home', $data); } The view: <?php include ('layout/header.php'); ?> <div class="container-fluid"> <div class="row"> <div class="col-md-4 quote-holder"> <img src="application/assets/alan1.jpg" alt="..." class="img-circle img-responsive"> <br> <blockquote class="text-center"> <p><?php echo $quotes[0]['quote']; ?></p> <footer class="text-center"><?php echo $quotes[0]['character_name']; ?> in <cite title="Source Title"><?php echo $quotes[0]['series_name']; ?></cite></footer> </blockquote> <button type="button" class="btn btn-default center-block">Generate quote</button> </div> </div> <?php include ('layout/footer.php'); ?> Here is the function in the model I am retrieving the data from: function getRandom() { $query = $this->db->query(" SELECT * FROM quotes, characters, series WHERE quotes.series_id = series.series_id AND quotes.character_id = characters.character_id ORDER BY rand() LIMIT 1 "); return $query->result_array(); } Should I simply be using something like this? $("button").click(function(){ $.get( "Page/index", function( data ) { //output data to page element... } });

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