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  • How to customize the process employed by WCF when serializing contract method arguments?

    - by mark
    Dear ladies and sirs. I would like to formulate a contrived scenario, which nevertheless has firm actual basis. Imagine a collection type COuter, which is a wrapper around an instance of another collection type CInner. Both implement IList (never mind the T). Furthermore, a COuter instance is buried inside some object graph, the root of which (let us refer to it as R) is returned from a WCF service method. My question is how can I customize the WCF serialization process, so that when R is returned, the request to serialize the COuter instance will be routed through my code, which will extract CInner and pass it to the serializer instead. Thus the receiving end still gets R, only no COuter instance is found in the object graph. I hoped that http://stackoverflow.com/questions/2220516/how-does-wcf-serialize-the-method-call will contain the answer, unfortunately the article mentioned there (http://msdn.microsoft.com/en-us/magazine/cc163569.aspx) only barely mentions that advanced serialization scenarios are possible using IDataContractSurrogate interface, but no details are given. I am, on the other hand, would really like to see a working example. Thank you very much in advance.

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  • Implementing list position locator in C++?

    - by jfrazier
    I am writing a basic Graph API in C++ (I know libraries already exist, but I am doing it for the practice/experience). The structure is basically that of an adjacency list representation. So there are Vertex objects and Edge objects, and the Graph class contains: list<Vertex *> vertexList list<Edge *> edgeList Each Edge object has two Vertex* members representing its endpoints, and each Vertex object has a list of Edge* members representing the edges incident to the Vertex. All this is quite standard, but here is my problem. I want to be able to implement deletion of Edges and Vertices in constant time, so for example each Vertex object should have a Locator member that points to the position of its Vertex* in the vertexList. The way I first implemented this was by saving a list::iterator, as follows: vertexList.push_back(v); v->locator = --vertexList.end(); Then if I need to delete this vertex later, then rather than searching the whole vertexList for its pointer, I can call: vertexList.erase(v->locator); This works fine at first, but it seems that if enough changes (deletions) are made to the list, the iterators will become out-of-date and I get all sorts of iterator errors at runtime. This seems strange for a linked list, because it doesn't seem like you should ever need to re-allocate the remaining members of the list after deletions, but maybe the STL does this to optimize by keeping memory somewhat contiguous? In any case, I would appreciate it if anyone has any insight as to why this happens. Is there a standard way in C++ to implement a locator that will keep track of an element's position in a list without becoming obsolete? Much thanks, Jeff

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  • C# How can I access to a dynamic created array of labels

    - by Markus Betz
    I created an array of labels on runtime. Now i have a problem to access these labels from other functions. Dynamic creation: private void Form1_Shown(object sender, EventArgs e) { Label[] Calendar_Weekday_Day = new Label[7]; for (int i = 0; i < 7; i++) { Calendar_Weekday_Day[i] = new Label(); Calendar_Weekday_Day[i].Location = new System.Drawing.Point(27 + (i * 137), 60); Calendar_Weekday_Day[i].Size = new System.Drawing.Size(132, 14); Calendar_Weekday_Day[i].Text = "Montag, 01.01.1970"; this.TabControl1.Controls.Add(Calendar_Weekday_Day[i]); } } And the function where I want to access to the dynamic created array of labels: private void display_weather_from_db(DateTime Weather_Startdate) { Calendar_Weekday_Day[0].Text = "Test1"; Calendar_Weekday_Day[1].Text = "Test2"; } Error shown: Error 1 The name 'Calendar_Weekday_Day' does not exist in the current context Form1.cs 1523 25 Test I tryed this, but didn't help :( public partial class Form1 : Form { private Label[] Calendar_Weekday_Day; } Someone an idea?

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  • scroll bar problems in java Layered Panes

    - by vondip
    Hi all, I've been trying to build this small java app. I find it very difficult to design UI in java, tasks that seem very simple become complicated and all these strange misbehaviors occur. In my app I've created a JLayeredPane which contains two layers. One on top on the other, They both contain scrollbars. Here's an explanation of the two layers: Layer 1: A very big image inside something similar to a scrollpane. The image is scrollable. Layer 2: A graphics2d object, this object draws an image. Once the image reaches a certain length, the layer gets a scrollpane that advances with the drawing with time. I'd like to connect both layers. I want layer two to update the scrollbar on layer 1. Meaning that once it reaches a certain length, both scrollbars will advance together. When I try doing that, the two scroll bars really do advance, but ( ! ) this strange flickering occurs. I don't understand what is the reason for the flickering. Is there any other way to implement this in a simple manner? I must have the second layer on top of the first one (drawing on top of image) since I cannot open a special post for thanking the wonderful people of this forum, I'll do it here. Thank you, you are great help. I hope this problem is solvable as well.

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  • ActionController::RoutingError (No route matches {:action=>"show", :controller=>"users", :id=>nil}):

    - by Matt Bishop
    I have been trying to fix this routing error for a long time. I would appreciate any assistance! This error is preventing me from being able to authenticate. Here is what I am getting in my Heroku logs. app/controllers/authentications_controller.rb:12:in `create' ActionController::RoutingError (No route matches {:action=>"show", :controller=>"users", :id=>nil}) Here is the routes.rb file: Company::Application.routes.draw do resources :profile_individual resources :careers match 'careers' => 'careers#index' match 'about' => 'about#index' constraints(:subdomain => /^$|www/) do devise_for :users resources :authentications, :identities #, :beta_invitations resources :users do resources :invitations, :controller => 'UserInvitation' do post :upload, :on => :collection get :email_template, :on => :collection get :plaintext_template, :on => :collection get :facebook_invitation, :on => :collection end member do get :summary get :recruits get :friends_events get :events_near_me get :recent_activity get :impact get :campaigns end end resources :password_resets do get 'password_reset' => 'password_resets#show', :as => 'password_reset' end resources :events, :only => [:new, :index, :create] resources :organizations, :only => [:index, :create] resources :orders do post :ipn, :on => :member resource :payment do member do post :relay_response get :receipt end end resource :paypal_integration do member do get :authorize get :cancel post :finalize end end end match '/users/:id/impact/money/:d' => 'users#impact_money_graph', :constraints => {:d => /\d+{4}_\d+{2}-\d+{2}/}, :as => :user_impact_money match '/users/:id/impact/money' => 'users#impact_money_graph', :as => :user_impact_money match '/users/:id/impact/recruits/:d' => 'users#impact_recruits_graph', :constraints => {:d => /\d+{4}_\d+{2}-\d+{2}/}, :as => :user_impact_recruits match '/users/:id/impact/recruits' => 'users#impact_recruits_graph', :as => :user_impact_recruits match '/auth/failure' => 'authentications#failure' match '/auth/:provider/callback' => 'authentications#create' match '/auth/:provider/callback' => 'authentications#show', :controller => 'users', :as => :login match '/logout' => 'authentications#destroy', :as => :logout match '/login' => 'authentications#new', :as => :login match "/join_team/:id" => "team_members#join", :as => :join_team match "/rsvp/:id" => "rsvps#show", :as => :rsvp match "/signup" => 'authentications#signup', :as => :signup match "/beacon/:id.gif" => "email_beacons#show", :as => :email_beacon root :to => "homes#show" match '/corporate_giving' => "homes#corporate_giving" end constraints(Subdomain) do resource :organization, :path => "/", :only => [:edit, :update] do member do get :org_photos_videos get :org_recent_activity end end resources :events, :except => [:index] do post :publish, :on => :member resource :supporter_invite resource :team_management do post :mailer, :on => :member end resource :team_member do post :invite, :on => :member end resource :rsvp do put :make_order, :on => :collection get :make_order, :on => :collection end resources :invites do post :upload, :on => :collection end resources :ticket_tiers, :team_members end match "/events" => redirect("/") root :to => "organizations#show" end namespace :admin do resources :stats resources :organizations resources :campaigns do resources :rewards resources :contents put :header, :action => 'header_update' end resources :users do member do post :grant_access post :revoke_access end end resources :nonprofits do member do put :approve put :revoke end end end resources :campaigns do get :find_charities, :on => :collection get :how_many_charities, :on => :collection member do post :join get :join post :header, :action => 'header_creation' put :header, :action => 'header_update' end resources :rewards resources :contents resource :donations do resource :paypal_integration, :controller => 'donations' do member do get :authorize get :cancel post :finalize end end end end match '/campaigns/:id/graph/:d' => 'campaigns#graph', :constraints => {:d => /\d+{4}_\d+ {2}-\d+{2}/}, :as => :graph_campaign match '/campaigns/:id/graph' => 'campaigns#graph', :as => :graph_campaign resources :business_campaigns, :controller => 'campaigns' resources :businesses do put :logo, :on => :collection, :action => 'upload_logo' member do get :summary get :recruits get :friends_events get :events_near_me get :recent_activity get :impact get :campaigns end end resources :nonprofit_campaigns, :controller => 'campaigns' resources :nonprofits do put :logo, :on => :collection, :action => 'upload_logo' member do get :summary get :recruits get :friends_events get :events_near_me get :recent_activity get :impact get :campaigns get :supporting_campaigns end end resources :publicities match '/campaigns/:campaign_id/rewards/:id' => 'campaigns#reward', :via => :get match "/robots.txt" => "application#robots_txt" match "/beta_invitations" => redirect('/') resource :sitemap resources :referrals end Here is my authentications_controller.rb file class AuthenticationsController < ApplicationController skip_before_filter :require_beta_access before_filter :redirect_to_profile_if_logged_in, :only => [:create, :new] layout :resolve_layout def create omniauth = request.env["omniauth.auth"] authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid']) if authentication && authentication.user.present? sign_in(:user, authentication.user) redirect_to session[:redirect_to] || user_path(current_user, :subdomain => nil) elsif current_user current_user.authentications.create!(:provider => omniauth['provider'], :uid => omniauth['uid']) redirect_to session[:redirect_to] || user_path(current_user, :subdomain => nil) else user = User.new user.apply_omniauth(omniauth) logger.debug "=======================auth=============================" logger.debug session[:referrer_token] logger.debug "========================================================" if session[:referrer_token] publicity = Publicity.find_by_token(session[:referrer_token]) user.invited_by = publicity user.recruited_by = publicity end if user.save sign_in(user) unless session[:redirect_to] session[:referrer_token] = nil end redirect_to session[:redirect_to] || user_path(current_user, :subdomain => nil) #redirect_to session[:redirect_to] || campaigns_url(:tc => request.env['omniauth.params']['tc']) #tc is for AB testing else session[:omniauth] = omniauth.except('extra') redirect_to signup_path end end end def failure flash[:error] = "Please check your email and password and try again" redirect_to login_path end def destroy reset_session redirect_to root_path end def signup # end private def redirect_to_profile_if_logged_in redirect_to user_path(current_user.permalink) if current_user end def resolve_layout case action_name when "new", "signup" "authentication" else "selfcontained" end end end I am adding my appplication_controller.rb too: class ApplicationController < ActionController::Base #Wrote by George for beta users -before_filter :require_beta_access before_filter :save_referrer_token protect_from_forgery helper_method :organization_admin?, :team_member?, :profile_url, :current_profile def set_headers # Set our headers here end def save_referrer_token #session.delete(:referrer_token) if params[:ref] publicity = Publicity.find_by_token(params[:ref]) logger.debug "========================================================" logger.debug current_profile.nil? logger.debug publicity.creator logger.debug current_profile logger.debug current_profile != publicity.creator session[:referrer_token] = params[:ref] if current_profile.nil? or publicity.creator != current_profile logger.debug session[:referrer_token] logger.debug "========================================================" end end def robots_txt robots = File.read(Rails.root + "public/robots.#{Rails.env}.txt") render :text => robots, :layout => false, :content_type => "text/plain" end def load_organization @organization = Organization.find_by_permalink(request.subdomain) raise ActiveRecord::RecordNotFound if @organization.nil? end def require_user unless current_user session[:redirect_to] = request.url redirect_to login_url(:host => request.domain) end end def require_beta_access if !current_user redirect_to root_url(:host => request.domain) elsif !current_user.beta_access? redirect_to new_beta_invitation_url(:host => request.domain) end end def require_organization_admin unless organization_admin? redirect_to root_url(:subdomain => @organization.permalink) end end def team_member? if current_user && @event.team_memberships.where(:user_id => current_user.id).count != 0 true end end def organization_admin? if current_user && current_user.beta_access? && @organization && @organization.memberships.where(:user_id => current_user.id, :role => 'admin').count != 0 true end end def profile_url(profile, opt = nil) if profile == current_user user_url(profile, :host => opt[:host]) elsif profile.is_a? BusinessProfile business_url(profile) elsif profile.is_a? NonprofitProfile nonprofit_url(profile) end end def set_current_profile(profile) session[:current_profile] = profile end def current_user @current_user ||= User.find_by_auth_token!(cookies[:auth_token]) if cookies[:auth_token] end def current_profile #if session session[:current_profile] || current_user #else # nil #end end IGIVEMORE_HTML5_OPTIOINS = { :style => 'z-index: 0;',:width => '290', :height => '200', :frameborder => '0', :url_params => {:wmode=>"opaque"} } def campaign_header_body(camp, opt = IGIVEMORE_HTML5_OPTIOINS) if camp.header_type == Campaign::HEADER_YOUTUBE youtube_html5(camp.header_url, opt).html_safe elsif camp.header_type == Campaign::HEADER_IMAGE "<img src=\"#{camp.header_url}\" width=\"#{opt[:width]}\" height=\"#{opt[:height]}\"/>'".html_safe else "Unsupported Type!!" end end def youtube_html5(url, opt) begin video = YouTubeIt::Client.new.video_by(url) video.embed_html5(opt).gsub(/http:\/\//,"https://") rescue => e "<div style='color:red; width:290px; height:100px; padding-top:100px'>Given Video URL has problem.</div>" end end end

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  • "A generic error occurred in GDI+" error while showing uploaded images

    - by Prasad
    i am using the following code to show the image that has been saved in my database from my asp.net mvc(C#) application:. public ActionResult GetSiteHeaderLogo() { SiteHeader _siteHeader = new SiteHeader(); Image imgImage = null; long userId = Utility.GetUserIdFromSession(); if (userId > 0) { _siteHeader = this.siteBLL.GetSiteHeaderLogo(userId); if (_siteHeader.Logo != null && _siteHeader.Logo.Length > 0) { byte[] _imageBytes = _siteHeader.Logo; if (_imageBytes != null) { using (System.IO.MemoryStream imageStream = new System.IO.MemoryStream(_imageBytes)) { imgImage = Image.FromStream(imageStream); } } string sFileExtension = _siteHeader.FileName.Substring(_siteHeader.FileName.IndexOf('.') + 1, _siteHeader.FileName.Length - (_siteHeader.FileName.IndexOf('.') + 1)); Response.ContentType = Utility.GetContentTypeByExtension(sFileExtension.ToLower()); Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.BufferOutput = false; if (imgImage != null) { ImageFormat _imageFormat = Utility.GetImageFormat(sFileExtension.ToLower()); imgImage.Save(Response.OutputStream, _imageFormat); imgImage.Dispose(); } } } return new EmptyResult(); } It works fine when i upload original image. But when i upload any downloaded images, it throws the following error: System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+. System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+. at System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams) at System.Drawing.Image.Save(Stream stream, ImageFormat format) For. Ex: When i upload the original image, it shows as logo in my site and i downloaded that logo from the site and when i re-upload the same downloaded image, it throws the above error. It seems very weird to me and not able to find why its happening. Any ideas on this?

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  • lighten background color on button click per binding

    - by one of two
    I want to lighten a buttons background on click. So I did the following: <converter:ColorLightConverter x:Key="colorLightConverter" /> ... <Style BasedOn="{StaticResource default}" TargetType="{x:Type controls:Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type controls:Button}"> <ControlTemplate.Triggers> <Trigger Property="IsPressed" Value="True"> <Setter Property="Background"> <Setter.Value> <SolidColorBrush Color="{Binding Path=Background.Color, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource colorLightConverter}}" /> </Setter.Value> </Setter> </Trigger> </ControlTemplate.Triggers> <Border Background="{TemplateBinding Background}" BorderBrush="Transparent" BorderThickness="0"> ... </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> The converter: class ColorLightConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { Color color = (Color)value; System.Drawing.Color lightColor = ControlPaint.Light(System.Drawing.Color.FromArgb(color.A, color.R, color.G, color.B)); return Color.FromArgb(lightColor.A, lightColor.R, lightColor.G, lightColor.B); } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } } But the converter isn't called when I click the button. I think there is anything wrong with the binding, but I can't see the error... Can you help me? Maybe I'm completely wrong. What I basically want to do: When clicking the button, take the current background color and lighten it. Not more...

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  • What kind of library to use for display of graphical objects and right click context menus

    - by Gopal
    Hi all, Goal: To develop a web based NMS interface which displays a network topology (e.g., switches, routers, links, endhosts). Each node should be 'movable' (draggable to an appropriate place manually or their best location computed algorithmically). I should be able to zoom into the network graph (say if there are many clusters of nodes and I want to concentrate on a particular cluster of nodes). I should be able to right-click any node or link and get a context menu (e.g., 'show routing table', 'show interfaces', 'show bandwidth utilization graph' etc.). The data for this network topology will be fetched by making calls to an apache based webserver where the backend scripts in python will fetch the appropriate data and send it via JSON to the web client. Question: I am assuming that some sort of javascript library/framework will be most appropriate for this - jQuery, Dojo, Moo etc. [I've never used any of these before]. Which of these would be most recommended for this sort of thing. Which would be easiest to learn (say in a months time). Thanks for any tips.

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  • Avoiding seasonality assumption for stl() or decompose() in R

    - by user303922
    Hello everybody, I have high frequency commodity price data that I need to analyze. My objective is to not assume any seasonal component and just identify a trend. Here is where I run into problems with R. There are two main functions that I know of to analyze this time series: decompose() and stl(). The problem is that they both take a ts object type with a frequency parameter greater than or equal to 2. Is there some way I can assume a frequency of 1 per unit time and still analyze this time series using R? I'm afraid that if I assume frequency greater than 1 per unit time, and seasonality is calculated using the frequency parameter, then my forecasts are going to depend on that assumption. names(crude.data)=c('Date','Time','Price') names(crude.data) freq = 2 win.graph() plot(crude.data$Time,crude.data$Price, type="l") crude.data$Price = ts(crude.data$Price,frequency=freq) I want frequency to be 1 per unit time but then decompose() and stl() don't work! dim(crude.data$Price) decom = decompose(crude.data$Price) win.graph() plot(decom$random[2:200],type="line") acf(decom$random[freq:length(decom$random-freq)]) Thank you.

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  • Why does this tooltip appear *below* a transclucent form?

    - by Daniel Stutzbach
    I have an form with an Opacity less then 1.0. I have a tooltip associated with a label on the form. When I hover the mouse over the label, the tooltip shows up under the form instead of over the form. If I leave the Opacity at its default value of 1.0, the tooltip correctly appears over the form. However, my form is obviously no longer translucent. ;-) I'm testing on an XP system with .NET 3.5. If you don't see this problem on your system, let me know what operating system and version of .NET you have. I have tried manually adjusting the position of the ToolTip with SetWindowPos() and creating a ToolTip "by hand" using CreateWindowEx(), but the problem remains. This makes me suspect its a Win32 API problem, not a problem with the Windows Forms implementation that runs on top of Win32. Why does the tooltip appear under the form, and, more importantly, how can I get it to appear over the form where it should? Here is a minimal program to demonstrate the problem: using System; using System.Windows.Forms; public class Form1 : Form { private ToolTip toolTip1; private Label label1; [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } public Form1() { toolTip1 = new ToolTip(); label1 = new Label(); label1.Location = new System.Drawing.Point(105, 127); label1.Text = "Hover over me"; label1.AutoSize = true; toolTip1.SetToolTip(label1, "This is a moderately long string, " + "designed to be very long so that it will also be quite long."); ClientSize = new System.Drawing.Size(292, 268); Controls.Add(label1); Opacity = 0.8; } }

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  • Prove correctness of unit test

    - by Timo Willemsen
    I'm creating a graph framework for learning purposes. I'm using a TDD approach, so I'm writing a lot of unit tests. However, I'm still figuring out how to prove the correctness of my unit tests For example, I have this class (not including the implementation, and I have simplified it) public class SimpleGraph(){ //Returns true on success public boolean addEdge(Vertex v1, Vertex v2) { ... } //Returns true on sucess public boolean addVertex(Vertex v1) { ... } } I also have created this unit tests @Test public void SimpleGraph_addVertex_noSelfLoopsAllowed(){ SimpleGraph g = new SimpleGraph(); Vertex v1 = new Vertex('Vertex 1'); actual = g.addVertex(v1); boolean expected = false; boolean actual = g.addEdge(v1,v1); Assert.assertEquals(expected,actual); } Okay, awesome it works. There is only one crux here, I have proved that the functions work for this case only. However, in my graph theory courses, all I'm doing is proving theorems mathematically (induction, contradiction etc. etc.). So I was wondering is there a way I can prove my unit tests mathematically for correctness? So is there a good practice for this. So we're testing the unit for correctness, instead of testing it for one certain outcome.

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  • Consistent HashCode() and Equals() results, but inconsistent TreeMap.containsKey() result

    - by smessing
    I have the following object Node: private class Node implements Comparable<Node>(){ private String guid(); ... public boolean equals(Node o){ return (this == o); } public int hashCode(){ return guid.hashCode(); } ... } And I use it in the following TreeMap: TreeMap<Node, TreeSet<Edge>> nodes = new TreeMap<Node, TreeSet<Edge>>(); Now, the tree map is used in a class called Graph to store nodes currently in the graph, along with a set of their edges (from the class Edge). My problem is when I try to execute: public containsNode(n){ for (Node x : nodes.keySet()) { System.out.println("HASH CODE: "); System.out.print(x.hashCode() == n.hashCode()); System.out.println("EQUALS: "); System.out.print(x.equals(n)); System.out.println("CONTAINS: "); System.out.print(nodes.containsKey(n)); System.out.println("N: " + n); System.out.println("X: " + x); } } I sometimes get the following: HASHCODE: true EQUALS: true CONTAINS: false N: foo X: foo Anyone have an idea as to what I'm doing wrong? I'm still new to all this, so I apologize in advance if I'm overlooking something simple (I know hashCode() doesn't really matter for TreeMap, but I figured I'd include it).

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  • glDrawArrays() slow on iPad?

    - by Nick
    Hey guys, I was wondering how to speed up my iPad application using OpenGLES 2.0. At the moment we have every drawable object draw itself with a call to glDrawArrays(). Blend mode is on, we really need it. Without disabling blendmode, how would we improve performance for this app? For instances, if we now draw 1 texture across the whole screen, the app only gets 15FPS, which is really slow I think? Are we doing something terribly wrong? Our drawing code (for each drawable), is as follows: - (void) draw { GLuint textureAvailable = 0; if(texture != nil){ textureAvailable = 1; } glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture.name); glVertexAttribPointer(ATTRIB_VERTEX, 2, GL_FLOAT, 0, 0, vertices); glEnableVertexAttribArray(ATTRIB_VERTEX); glVertexAttribPointer(ATTRIB_COLOR, 4, GL_FLOAT, 1, 0, colorsWithMultipliedAlpha); glEnableVertexAttribArray(ATTRIB_COLOR); glVertexAttribPointer(ATTRIB_TEXTUREMAP, 2, GL_FLOAT, 1, 0, textureMapping); glEnableVertexAttribArray(ATTRIB_TEXTUREMAP); //Note that we are NOT using position.z here because that is only used to determine drawing order int *jnUniforms = JNOpenGLConstants::getInstance().uniforms; glUniform4f(jnUniforms[UNIFORM_TRANSLATE], position.x, position.y, 0.0, 0.0); glUniform4f(jnUniforms[UNIFORM_SCALE], scale.x, scale.y, 1.0, 1.0); glUniform1f(jnUniforms[UNIFORM_ROTATION], rotation); glUniform1i(jnUniforms[UNIFORM_TEXTURE_SAMPLE], 0); glUniform2f(jnUniforms[UNIFORM_TEXTURE_REPEAT], textureRepeat.x, textureRepeat.y); glUniform1i(jnUniforms[UNIFORM_TEXTURE_AVAILABLE], textureAvailable); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); }

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  • Classical task-scheduling assignment

    - by Bruno
    I am working on a flight scheduling app (disclaimer: it's for a college project, so no code answers, please). Please read this question w/ a quantum of attention before answering as it has a lot of peculiarities :( First, some terminology issues: You have planes and flights, and you have to pair them up. For simplicity's sake, we'll assume that a plane is free as soon as the flight using it prior lands. Flights are seen as tasks: They have a duration They have dependencies They have an expected date/time for beginning Planes can be seen as resources to be used by tasks (or flights, in our terminology). Flights have a specific type of plane needed. e.g. flight 200 needs a plane of type B. Planes obviously are of one and only one specific type, e.g., Plane Airforce One is of type C. A "project" is the set of all the flights by an airline in a given time period. The functionality required is: Finding the shortest possible duration for a said project The earliest and latest possible start for a task (flight) The critical tasks, with basis on provided data, complete with identifiers of preceding tasks. Automatically pair up flights and planes, so as to get all flights paired up with a plane. (Note: the duration of flights is fixed) Get a Gantt diagram with the projects scheduling, in which all flights begin as early as possible, showing all previously referred data graphically (dependencies, time info, etc.) So the questions is: How in the world do I achieve this? Particularly: We are required to use a graph. What do the graph's edges and nodes respectively symbolise? Are we required to discard tasks to achieve the critical tasks set? If you could also recommend some algorithms for us to look up, that'd be great.

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  • On XP, how do I get the tooltip to appear above a transclucent form?

    - by Daniel Stutzbach
    I have an form with an Opacity less then 1.0. I have a tooltip associated with a label on the form. When I hover the mouse over the label, the tooltip shows up under the form instead of over the form. If I leave the Opacity at its default value of 1.0, the tooltip correctly appears over the form. However, my form is obviously no longer translucent. ;-) I have tried manually adjusting the position of the ToolTip with SetWindowPos() and creating a ToolTip "by hand" using CreateWindowEx(), but the problem remains. This makes me suspect its a Win32 API problem, not a problem with the Windows Forms implementation that runs on top of Win32. Why does the tooltip appear under the form, and, more importantly, how can I get it to appear over the form where it should? Edit: this appears to be an XP-only problem. Vista and Windows 7 work correctly. I'd still like to find a workaround to get the tooltip to appear above the form on XP. Here is a minimal program to demonstrate the problem: using System; using System.Windows.Forms; public class Form1 : Form { private ToolTip toolTip1; private Label label1; [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } public Form1() { toolTip1 = new ToolTip(); label1 = new Label(); label1.Location = new System.Drawing.Point(105, 127); label1.Text = "Hover over me"; label1.AutoSize = true; toolTip1.SetToolTip(label1, "This is a moderately long string, " + "designed to be very long so that it will also be quite long."); ClientSize = new System.Drawing.Size(292, 268); Controls.Add(label1); Opacity = 0.8; } }

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  • Structure map and generics (in XML config)

    - by James D
    Hi I'm using the latest StructureMap (2.5.4.264), and I need to define some instances in the xml configuration for StructureMap using generics. However I get the following 103 error: Unhandled Exception: StructureMap.Exceptions.StructureMapConfigurationException: StructureMap configuration failures: Error: 103 Source: Requested PluginType MyTest.ITest`1[[MyTest.Test,MyTest]] configured in Xml cannot be found Could not create a Type for 'MyTest.ITest`1[[MyTest.Test,MyTest]]' System.ApplicationException: Could not create a Type for 'MyTest.ITest`1[[MyTest.Test,MyTest]]' ---> System.TypeLoadException: Could not loa d type 'MyTest.ITest`1' from assembly 'StructureMap, Version=2.5.4.264, Culture=neutral, PublicKeyToken=e60ad81abae3c223'. at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& s tackMark) at System.Type.GetType(String typeName, Boolean throwOnError) at StructureMap.Graph.TypePath.FindType() --- End of inner exception stack trace --- at StructureMap.Graph.TypePath.FindType() at StructureMap.Configuration.GraphBuilder.ConfigureFamily(TypePath pluginTypePath, Action`1 action) A simply replication of the code is as follows: public interface ITest<T> { } public class Test { } public class Concrete : ITest<Test> { } Which I then wish to define in the XML configuration something as follows: <DefaultInstance PluginType="MyTest.ITest`1[[MyTest.Test,MyTest]],MyTest" PluggedType="MyTest.Concrete,MyTest" Scope="Singleton" /> I've been racking my brain, however I can't see what I'm doing wrong - I've used Type.GetType to verify the type actually is valid which it is. Anyone have any ideas? Thanks !

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  • Saving a single entity instead of the entire context - revisited

    - by nite
    I’m looking for a way to have fine grained control over what is saved using Entity Framework, rather than the whole ObjectContext.SaveChanges(). My scenario is pretty straight forward, and I’m quite amazed not catered for in EF – pretty basic in NHibernate and all other data access paradigms I’ve seen. I’m generating a bunch of data (in a WPF UI) and allowing the user to fine tune what is proposed and choose what is actually committed to the database. For the proposed entities I’m: getting a bunch of reference entities (eg languages) via my objectcontext, creating the proposed entities and assigning these reference entities to them (as navigation properties), so by virtue of their relationship to the reference entities they’re implicitly added to the objectconext Trying to create & save individual entites based on the proposed entities. I figure this should be really simple & trivial but everything I’ve tried I’ve hit a brick wall, either I set up another objectcontext & add just the entity I need (it then tries to add the whole graph and fails as it’s on another objectcontext). I’ve tried MergeOptions = NoTracking on my reference entities to try to get the Attach/AddObject not to navigate through these to create a graph, no avail. I've removed the navigation properties from the reference entities. I've tried AcceptAllChanges, that works but pretty useless in practice as I do still want to track & save other entities. In a simple test, I can create 2 of my proposed entities, AddObject the one I want to save and then Detach the one I dont then call SaveChanges, this works but again not great in practice. Following are a few links to some of the nifty ideas which in the end don’t help in the end but illustrate the complexity of EF for something so simple. I’m really looking for a SaveSingle/SaveAtomic method, and think it’s a pretty reasonable & basic ask for any DAL, letalone a cutting edge ORM. http://stackoverflow.com/questions/1301460/saving-a-single-entity-instead-of-the-entire-context www.codeproject.com/KB/architecture/attachobjectgraph.aspx?fid=1534536&df=90&mpp=25&noise=3&sort=Position&view=Quick&select=3071122&fr=1 bernhardelbl.spaces.live.com/blog/cns!DB54AE2C5D84DB78!238.entry

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  • How to manage lifecycle in a ViewGroup-derived class?

    - by Scott Smith
    I had a bunch of code in an activity that displays a running graph of some external data. As the activity code was getting kind of cluttered, I decided to extract this code and create a GraphView class: public class GraphView extends LinearLayout { public GraphView(Context context, AttributeSet attrs) { super(context, attrs); LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.graph_view, this, true); } public void start() { // Perform initialization (bindings, timers, etc) here } public void stop() { // Unbind, destroy timers, yadda yadda } . . . } Moving stuff into this new LinearLayout-derived class was simple. But there was some lifecycle management code associated with creating and destroying timers and event listeners used by this graph (I didn't want this thing polling in the background if the activity was paused, for example). Coming from a MS Windows background, I kind of expected to find overridable onCreate() and onDestroy() methods or something similar, but I haven't found anything of the sort in LinearLayout (or any of its inherited members). Having to leave all of this initialization code in the Activity, and then having to pass it into the view seemed like it defeated the original purpose of encapsulating all of this code into a reusable view. I ended up adding two additional public methods to my view: start() and stop(). I make these calls from the activity's onResume() and onPause() methods respectively. This seems to work, but it feels like I'm using duct tape here. Does anyone know how this is typically done? I feel like I'm missing something...

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  • set width of bars in matlab bar plot on logarithmic scale

    - by KatyB
    I am a bit confused on how to draw a bar graph for the following example: x_lims = [1000,10000;10000,100000;100000,1000000;1000000,10000000;10000000,... 100000000;100000000,1000000000;1000000000,10000000000;... 10000000000,100000000000;100000000000,1e12]; ex1 = [277422033.049038;24118536.4203188;2096819.03295482;... 182293.402068030;15905;1330;105;16;1]; Here, x_lims is the x axis limits for each individual bar and ex1 is the count. How can I plot these on a bar graph so that the width of each individual bar along the x axis is defined by the distance between x_lims(:,1) and x_lims(:,2) and the y value is defined by ex1? So far I have: bar(log10(x_lims(:,1)),log10(ex1)); set(gca,'Xtick',3:11,'YTick',0:9); set(gca,'Xticklabel',10.^get(gca,'Xtick'),... 'Yticklabel',10.^get(gca,'Ytick')); But I would like to (1) have the labels to be the same as if they were created using semilogx or semilogy e.g. 10^9, and (2) I would like to remove the space between the bars, for the first bar, for example, I would like to have it extend horizontally from 1000 to 10000 and then the second bar from 10000 to 100000, and so on. How can this be done?

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  • Update a portion UIView

    - by Brett
    Hi; I'm using -setNeedsDisplayinRect to update only a part of my UIView. However, all of my drawing done previously to calling this method is erased. Here is my code in the UIView subclass: -(void)drawRect:(CGRect)rect{ CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, r, g, b, 1); CGContextSetRGBStrokeColor(context, r, g, b, 1); CGRect arect = CGRectMake(x,y,1,1); CGContextFillRect(context, arect); NSLog(@"drawing"); } and in the view controller: -(void)drawView{ drawingView = [[DrawingView alloc]init]; x=10; y=10; r=0; g=0; b=0; [drawingView setNeedsDisplayInRect:CGRectMake(x, y, 1, 1)]; x=20; y=20; r=0; g=0; b=0; [drawingView setNeedsDisplayInRect:CGRectMake(x, y, 1, 1)]; } I end up with a screen where there is only one pixel at 20,20. Any help with this is so much appreciated. I am a beginner with XCode and am trying to complete a class project asap.

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  • Highlighting a piechart slice from an HTML element (mouseover)

    - by nickhar
    I have a series of HTML table cells with data - an example of which is: <tr id="rrow1"> <td> <a href="/electricity" class="category">Electricity</a> </td> <td> 901.471 </td> </tr> <tr id="rrow2">... <tr id="rrow3">... etc In this case, each <tr> (or hypathetically for the wider community a div/span/tr/td) is assigned a sequential id based on $rrow++; in a while loop (in PHP). I also have a Piechart using the highcharts library, where i'd like to highlight the slice (sliced: true) based upon onmouseover of particular div/span/tr/td element - in this case #rrow1 as above, but multiple/iterative elements as required and (sliced: false) onmouseout... As a simple example, I've tried accessing various derivatives of the following, but failed: $('#rrow1').mouseover(function() { chart.series[0].graph.attr('sliced', true); }); $('#rrow1').mouseout(function() { chart.series[0].graph.attr('sliced', false); }); The nearest I've found is this but bastardised at most and without success: plotOptions: { series: { mouseOver: function() { if( $('#rrow1').mouseover ) series.x = sliced: true; }, mouseOut: function() { if( $('#rrow1').mouseout ) series.x = sliced: false; } } } These are far from approaching correct and despite searching I can't find a valid/helpful example to work from or draw direction. You can view the pie chart in question on jsfiddle here.

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  • How to make zebra table with Sphinx? Or how to use jQuery with Sphinx?

    - by prosseek
    I think the table generated from Sphinx is not pretty, as it produces the following HTML code for table. <table border="1" class="docutils"> <colgroup> <col width="43%" /> <col width="29%" /> <col width="29%" /> </colgroup> <thead valign="bottom"> <tr><th class="head">Graph</th> <th class="head">HIR</th> <th class="head">AIR</th> </tr> </thead> <tbody valign="top"> <tr><td>Graph</td> <td>Circuit</td> <td>System</td> </tr> </tbody> </table> How can I turn in into pretty one, for example, zebra table? The HTML generated html has the jQuery, and according to this site, it's just one line of code to have a zebra table, but I'm not sure how to use jQuery to make a zebra table. $("tr:nth-child(odd)").addClass("odd"); Q: How to use jQuery with Sphinx? Q: Is there any other way to have a zebra table with Sphinx?

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  • Java Graphics not displaying on successive function calls, why?

    - by primehunter326
    Hi, I'm making a visualization for a BST implementation (I posted another question about it the other day). I've created a GUI which displays the viewing area and buttons. I've added code to the BST implementation to recursively traverse the tree, the function takes in coordinates along with the Graphics object which are initially passed in by the main GUI class. My idea was that I'd just have this function re-draw the tree after every update (add, delete, etc...), drawing a rectangle over everything first to "refresh" the viewing area. This also means I could alter the BST implementation (i.e by adding a balance operation) and it wouldn't affect the visualization. The issue I'm having is that the draw function only works the first time it is called, after that it doesn't display anything. I guess I don't fully understand how the Graphics object works since it doesn't behave the way I'd expect it to when getting passed/called from different functions. I know the getGraphics function has something to do with it. Relevant code: private void draw(){ Graphics g = vPanel.getGraphics(); tree.drawTree(g,ORIGIN,ORIGIN); } vPanel is what I'm drawing on private void drawTree(Graphics g, BinaryNode<AnyType> n, int x, int y){ if( n != null ){ drawTree(g, n.left, x-10,y+10 ); if(n.selected){ g.setColor(Color.blue); } else{ g.setColor(Color.gray); } g.fillOval(x,y,20,20); g.setColor(Color.black); g.drawString(n.element.toString(),x,y); drawTree(g,n.right, x+10,y+10); } } It is passed the root node when it is called by the public function. Do I have to have: Graphics g = vPanel.getGraphics(); ...within the drawTree function? This doesn't make sense!! Thanks for your help.

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  • opengl: question about glutMainLoop()

    - by lego69
    can somebody explain how does glutMainLoop work? and second question, why glClearColor(0.0f, 0.0f, 1.0f, 1.0f); defined after glutDisplayFunc(RenderScene); cause firstly we call glClear(GL_COLOR_BUFFER_BIT); and only then define glClearColor(0.0f, 0.0f, 1.0f, 1.0f); int main(int argc, char* argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(800, 00); glutInitWindowPosition(300,50); glutCreateWindow("GLRect"); glutDisplayFunc(RenderScene); glutReshapeFunc(ChangeSize); glClearColor(0.0f, 0.0f, 1.0f, 1.0f); <-- glutMainLoop(); return 0; } void RenderScene(void) { // Clear the window with current clearing color glClear(GL_COLOR_BUFFER_BIT); // Set current drawing color to red // R G B glColor3f(1.0f, 0.0f, 1.0f); // Draw a filled rectangle with current color glRectf(0.0f, 0.0f, 50.0f, -50.0f); // Flush drawing commands glFlush(); }

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  • Optimized 2D Tile Scrolling in OpenGL

    - by silicus
    Hello, I'm developing a 2D sidescrolling game and I need to optimize my tiling code to get a better frame rate. As of right now I'm using a texture atlas and 16x16 tiles for 480x320 screen resolution. The level scrolls in both directions, and is significantly larger than 1 screen (thousands of pixels). I use glTranslate for the actual scrolling. So far I've tried: Drawing only the on-screen tiles using glTriangles, 2 per square tile (too much overhead) Drawing the entire map as a Display List (great on a small level, way to slow on a large one) Partitioning the map into Display Lists half the size of the screen, then culling display lists (still slows down for 2-directional scrolling, overdraw is not efficient) Any advice is appreciated, but in particular I'm wondering: I've seen Vertex Arrays/VBOs suggested for this because they're dynamic. What's the best way to take advantage of this? If I simply keep 1 screen of vertices plus a bit of overdraw, I'd have to recopy the array every few frames to account for the change in relative coordinates (shift everything over and add the new rows/columns). If I use more overdraw this doesn't seem like a big win; it's like the half-screen display list idea. Does glScissor give any gain if used on a bunch of small tiles like this, be it a display list or a vertex array/VBO Would it be better just to build the level out of large textures and then use glScissor? Would losing the memory saving of tiling be an issue for mobile development if I do this (just curious, I'm currently on a PC)? This approach was mentioned here Thanks :)

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