Search Results

Search found 45316 results on 1813 pages for 'class literals'.

Page 596/1813 | < Previous Page | 592 593 594 595 596 597 598 599 600 601 602 603  | Next Page >

  • Find Object in Many-to-Many Szanario - Grails

    - by Oliver
    Hello, i got this situation: - class user with hasMany Roles and belongsTo Roles - class Role with hasMans User how can i get the roles belongs to a user, object user is given, how can i get objects in a many-to-many szanario? findByX doesn't work, it's affect just one table, but i need a "find" or something else to find Object overall / over many tables. can anyone help me? and excuse my no propper english^^

    Read the article

  • Does code in the constructor add to code in subclass constructors?

    - by Jeremy Rudd
    Does code in the constructor add to code in subclass constructors? Or does the subclass's constructor override the superclass? Given this example superclass constructor: class Car{ function Car(){ trace("CAR") } } ...and this subclass constructor: class FordCar extends Car{ function FordCar(){ trace("FORD") } } When an instance of FordCar is created, will this trace "Car" and "Ford" ??

    Read the article

  • Getting custom attribute from an Exception thrown during testing

    - by Amit Bhargava
    I'm using JUnit4 to test my code. Now, I'm aware that the following annotation allows me to expect an exception of a certain type @Test(expected = NipException.class) However, I have an 'errorCode' property in my exception class which I would also like to verify. This is because the same exception is thrown at three places in the same method with different error codes. How do I access 'errorCode' of the thrown exception?

    Read the article

  • Activity in Android

    - by leduchuy89vn
    Normally, a Java p'rogram starts from an object, then that object will create some GUI objects (window) and call the "Show" method So, is there any way to do the same thing in Android, since, by default in Android, a program runs from an object created by a class which extended from Activity class?

    Read the article

  • siblings in jquery hide everything

    - by user2658615
    This is my html code : <div id="tabbase"> <ul> <li>a</li> <li>b</li> </ul> <div id="tabs-0"></div> <div id="tabs-1"> <div class="width50"> <h5>title1</h5> <div class="da-desc">a</div> <button>continue</button> </div> <div class="width50"> <h5>title2</h5> <div class="da-desc">b</div> <button>continue</button> </div> </div> </div> and this is CSS code : #tabbase { margin:16px; } #tabbase ul li { display:inline-block; margin:5px 0px 5px 0; background:rgb(224,224,224); padding:5px; border:1px solid rgb(153,153,153); cursor:pointer; } #tabs-0, #tabs-1 { border:1px solid rgb(153,153,153); background:rgb(255,255,255); padding:5px; margin:-5px 0 0 0; } #tabbase ul li.active { background:rgb(255,255,255) !important; } and this is jquery code : $(document).ready(function(e) { $("#tabs-1").hide(0); $("#tabbase ul li:first").addClass("active"); $("#tabbase ul li").click(function(e) { $(this).addClass("active"); $(this).siblings(this).removeClass("active"); count = $("#tabbase ul li").index(this); $('#tabs-'+count).slideDown(500).siblings(this).slideUp(500); }); }); so you can see that when you click on a tab , all tabs are gone and how can I fix this?

    Read the article

  • how to count all distinct records in many-to-many relations in django ORM?

    - by marduk-pl
    hi, i have two models: class Project(models.Model): categories = models.ManyToManyField(Category) class Category(models.Model): name = models.CharField() now, i make some queryset: query = Project.objects.filter(id__in=[1,2,3,4]) and i like to get list of all distinct categories in this queryset with count of projects with refering to these categories - exactly i would like to get that results: category1 - 10 projects category2 - 5 projects that is opposite to this query: query2 = query.annotate(Count('categories')) what return me: project1 - 2categories project2 - 7categories how can i make it in django ORM?

    Read the article

  • IE8 web slice - CSS problem

    - by rjovic
    Again me with IE8 web slice :) This time i have following problem. I created web slice for IE8 and created button for users where they can choice to add it to their browsers. Code is : <input class="add" type="button" value="Dodaj Xica web slice u IE8!" onclick='window.external.AddToFavoritesBar("http://localhost:51914/Home/GetWebSlice", "xica.rjovic.com", "slice");' /> There is everything fine, and web slice is added to IE8 and web page is displayed correct. But I have problem with CSS in web slice. I defined css in it, but when web slice i rendered there are only black fonts without any css properties. My web slice is defined as : <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %> <!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 runat="server"> <title>GetWebSlice</title> <style type="text/css"> p {color: white; } body {background-color: blue; } .container {background-color: red;} </style> </head> <body> <div class="hslice container" id="xica"> <h2 class="entry-title container">Xica web slice</h2> <div class="entry-content"> <h2>Saldo : <b><%= ViewData["total"] %></b></h2> <p><%= ViewData["cardNumber"] %></p> <p>Status : <%= ViewData["status"] %></p> </div> </div> </body> </html> When I try to see web slice directly in my browser then everything is ok, and css is show as expected. Thank you...! EDIT : here is the picture of problem : http://www.deviantpics.com/share-2F10_4BD73E25.html

    Read the article

  • Is this not downcasting?

    - by cambr
    If I do double d = 34.56; int i = (int)d; Am I not "downcasting"? OR Is this term only used in terms of classes and objects? I am confused because in this case we are "downcasting" from a bigger double to a smaller int, but in case of classes, we "downcast" from a smaller base class to a bigger derived class. Aren't these two conventions, in some sense, opposite?

    Read the article

  • android instrumentation testsuite

    - by siri
    Hi I have written two test cases in a package com.app.myapp.test When I try to run them both of them are not getting executed, only one test case gets executed and stops. I have written the following testsuite in the same package AllTests.java public class AllTests extends TestSuite { public static Test suite() { return new TestSuiteBuilder(AllTests.class).includePackages("./src/com.ni.mypaint.test","./src/com.ni.mpaint.test").build(); /* .includeAllPackagesUnderHere() .build();*/ } Is the code and location for this testsuite is correct?

    Read the article

  • State machines in C#

    - by Sir Psycho
    Hi, I'm trying to work out what's going on with this code. I have two threads iterating over the range and I'm trying to understand what is happening when the second thread calls GetEnumerator(). This line in particular (T current = start;), seems to spawn a new 'instance' in this method by the second thread. Seeing that there is only one instance of the DateRange class, I'm trying to understand why this works. Thanks in advance. class Program { static void Main(string[] args) { var daterange = new DateRange(DateTime.Now, DateTime.Now.AddDays(10), new TimeSpan(24, 0, 0)); var ts1 = new ThreadStart(delegate { foreach (var date in daterange) { Console.WriteLine("Thread " + Thread.CurrentThread.ManagedThreadId + " " + date); } }); var ts2 = new ThreadStart(delegate { foreach (var date in daterange) { Console.WriteLine("Thread " + Thread.CurrentThread.ManagedThreadId + " " + date); } }); Thread t1 = new Thread(ts1); Thread t2 = new Thread(ts2); t1.Start(); Thread.Sleep(4000); t2.Start(); Console.Read(); } } public class DateRange : Range<DateTime> { public DateTime Start { get; private set; } public DateTime End { get; private set; } public TimeSpan SkipValue { get; private set; } public DateRange(DateTime start, DateTime end, TimeSpan skip) : base(start, end) { SkipValue = skip; } public override DateTime GetNextElement(DateTime current) { return current.Add(SkipValue); } } public abstract class Range<T> : IEnumerable<T> where T : IComparable<T> { readonly T start; readonly T end; public Range(T start, T end) { if (start.CompareTo(end) > 0) throw new ArgumentException("Start value greater than end value"); this.start = start; this.end = end; } public abstract T GetNextElement(T currentElement); public IEnumerator<T> GetEnumerator() { T current = start; do { Thread.Sleep(1000); yield return current; current = GetNextElement(current); } while (current.CompareTo(end) < 1); } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return GetEnumerator(); } }

    Read the article

  • "Can't mass-assign protected attributes" with nested protected models

    - by JohnnyFive
    I'm having a hell of a time trying to get this nested model working. I've tried all manner of pluralization/singular, removing the attr_accessible altogether, and who knows what else. restaurant.rb: # == RESTAURANT MODEL # # Table name: restaurants # # id :integer not null, primary key # name :string(255) # created_at :datetime not null # updated_at :datetime not null # class Restaurant < ActiveRecord::Base attr_accessible :name, :job_attributes has_many :jobs has_many :users, :through => :jobs has_many :positions accepts_nested_attributes_for :jobs, :allow_destroy => true validates :name, presence: true end job.rb: # == JOB MODEL # # Table name: jobs # # id :integer not null, primary key # restaurant_id :integer # shortname :string(255) # user_id :integer # created_at :datetime not null # updated_at :datetime not null # class Job < ActiveRecord::Base attr_accessible :restaurant_id, :shortname, :user_id belongs_to :user belongs_to :restaurant has_many :shifts validates :name, presence: false end restaurants_controller.rb: class RestaurantsController < ApplicationController before_filter :logged_in, only: [:new_restaurant] def new @restaurant = Restaurant.new @user = current_user end def create @restaurant = Restaurant.new(params[:restaurant]) if @restaurant.save flash[:success] = "Restaurant created." redirect_to welcome_path end end end new.html.erb: <% provide(:title, 'Restaurant') %> <%= form_for @restaurant do |f| %> <%= render 'shared/error_messages' %> <%= f.label "Restaurant Name" %> <%= f.text_field :name %> <%= f.fields_for :job do |child_f| %> <%= child_f.label "Nickname" %> <%= child_f.text_field :shortname %> <% end %> <%= f.submit "Done", class: "btn btn-large btn-primary" %> <% end %> Output Parameters: {"utf8"=>"?", "authenticity_token"=>"DjYvwkJeUhO06ds7bqshHsctS1M/Dth08rLlP2yQ7O0=", "restaurant"=>{"name"=>"The Pink Door", "job"=>{"shortname"=>"PD"}}, "commit"=>"Done"} The error i'm receiving is: ActiveModel::MassAssignmentSecurity::Error in RestaurantsController#create Cant mass-assign protected attributes: job Rails.root: /home/johnnyfive/Dropbox/Projects/sa Application Trace | Framework Trace | Full Trace app/controllers/restaurants_controller.rb:11:in `new' app/controllers/restaurants_controller.rb:11:in `create' Anyone have ANY clue how to get this to work? Thanks!

    Read the article

  • is this possible in java or any other programming language

    - by drake
    public abstract class Master { public void printForAllMethodsInSubClass() { System.out.println ("Printing before subclass method executes"); } } public class Owner extends Master { public void printSomething () { System.out.println ("This printed from Owner"); } public int returnSomeCals () { return 5+5; } } Without messing with methods of subclass...is it possible to execute printForAllMethodsInSubClass() before the method of a subclass gets executed?

    Read the article

  • allocing an object based on a string name

    - by Roger Gilbrat
    Is there a way in objective-c/Cocoa to alloc an object when the class name isn't know until run-time. I seem to remember something about this a while ago, but can't find anything on it now. Something like: [[@"MyClass" alloc] init]; I seem to recall a function that would return some kind of class id based on a string that can then be used to alloc the object.

    Read the article

  • Implementing a robust async stream reader for a console

    - by Jon
    I recently provided an answer to this question: C# - Realtime console output redirection. As often happens, explaining stuff (here "stuff" was how I tackled a similar problem) leads you to greater understanding and/or, as is the case here, "oops" moments. I realized that my solution, as implemented, has a bug. The bug has little practical importance, but it has an extremely large importance to me as a developer: I can't rest easy knowing that my code has the potential to blow up. Squashing the bug is the purpose of this question. I apologize for the long intro, so let's get dirty. I wanted to build a class that allows me to receive input from a Stream in an event-based manner. The stream, in my scenario, is guaranteed to be a FileStream and there is also an associated StreamReader already present to leverage. The public interface of the class is this: public class MyStreamManager { public event EventHandler<ConsoleOutputReadEventArgs> StandardOutputRead; public void StartSendingEvents(); public void StopSendingEvents(); } Obviously this specific scenario has to do with a console's standard output. StartSendingEvents and StopSendingEvents do what they advertise; for the purposes of this discussion, we can assume that events are always being sent without loss of generality. The class uses these two fields internally: protected readonly StringBuilder inputAccumulator = new StringBuilder(); protected readonly byte[] buffer = new byte[256]; The functionality of the class is implemented in the methods below. To get the ball rolling: public void StartSendingEvents(); { this.stopAutomation = false; this.BeginReadAsync(); } To read data out of the Stream without blocking, and also without requiring a carriage return char, BeginRead is called: protected void BeginReadAsync() { if (!this.stopAutomation) { this.StandardOutput.BaseStream.BeginRead( this.buffer, 0, this.buffer.Length, this.ReadHappened, null); } } The challenging part: BeginRead requires using a buffer. This means that when reading from the stream, it is possible that the bytes available to read ("incoming chunk") are larger than the buffer. Since we are only handing off data from the stream to a consumer, and that consumer may well have inside knowledge about the size and/or format of these chunks, I want to call event subscribers exactly once for each chunk. Otherwise the abstraction breaks down and the subscribers have to buffer the incoming data and reconstruct the chunks themselves using said knowledge. This is much less convenient to the calling code, and detracts from the usefulness of my class. Edit: There are comments below correctly stating that since the data is coming from a stream, there is absolutely nothing that the receiver can infer about the structure of the data unless it is fully prepared to parse it. What I am trying to do here is leverage the "flush the output" "structure" that the owner of the console imparts while writing on it. I am prepared to assume (better: allow my caller to have the option to assume) that the OS will pass me the data written between two flushes of the stream in exactly one piece. To this end, if the buffer is full after EndRead, we don't send its contents to subscribers immediately but instead append them to a StringBuilder. The contents of the StringBuilder are only sent back whenever there is no more to read from the stream (thus preserving the chunks). private void ReadHappened(IAsyncResult asyncResult) { var bytesRead = this.StandardOutput.BaseStream.EndRead(asyncResult); if (bytesRead == 0) { this.OnAutomationStopped(); return; } var input = this.StandardOutput.CurrentEncoding.GetString( this.buffer, 0, bytesRead); this.inputAccumulator.Append(input); if (bytesRead < this.buffer.Length) { this.OnInputRead(); // only send back if we 're sure we got it all } this.BeginReadAsync(); // continue "looping" with BeginRead } After any read which is not enough to fill the buffer, all accumulated data is sent to the subscribers: private void OnInputRead() { var handler = this.StandardOutputRead; if (handler == null) { return; } handler(this, new ConsoleOutputReadEventArgs(this.inputAccumulator.ToString())); this.inputAccumulator.Clear(); } (I know that as long as there are no subscribers the data gets accumulated forever. This is a deliberate decision). The good This scheme works almost perfectly: Async functionality without spawning any threads Very convenient to the calling code (just subscribe to an event) Maintains the "chunkiness" of the data; this allows the calling code to use inside knowledge of the data without doing any extra work Is almost agnostic to the buffer size (it will work correctly with any size buffer irrespective of the data being read) The bad That last almost is a very big one. Consider what happens when there is an incoming chunk with length exactly equal to the size of the buffer. The chunk will be read and buffered, but the event will not be triggered. This will be followed up by a BeginRead that expects to find more data belonging to the current chunk in order to send it back all in one piece, but... there will be no more data in the stream. In fact, as long as data is put into the stream in chunks with length exactly equal to the buffer size, the data will be buffered and the event will never be triggered. This scenario may be highly unlikely to occur in practice, especially since we can pick any number for the buffer size, but the problem is there. Solution? Unfortunately, after checking the available methods on FileStream and StreamReader, I can't find anything which lets me peek into the stream while also allowing async methods to be used on it. One "solution" would be to have a thread wait on a ManualResetEvent after the "buffer filled" condition is detected. If the event is not signaled (by the async callback) in a small amount of time, then more data from the stream will not be forthcoming and the data accumulated so far should be sent to subscribers. However, this introduces the need for another thread, requires thread synchronization, and is plain inelegant. Specifying a timeout for BeginRead would also suffice (call back into my code every now and then so I can check if there's data to be sent back; most of the time there will not be anything to do, so I expect the performance hit to be negligible). But it looks like timeouts are not supported in FileStream. Since I imagine that async calls with timeouts are an option in bare Win32, another approach might be to PInvoke the hell out of the problem. But this is also undesirable as it will introduce complexity and simply be a pain to code. Is there an elegant way to get around the problem? Thanks for being patient enough to read all of this.

    Read the article

  • JUnitCore.runClasses doesn't print anything....

    - by Grégoire
    I have a test class that I'm trying to run from a main method with the folowing code : Result r = org.junit.runner.JUnitCore.runClasses(TestReader.class); when I examine the Result object I can see that 5 tests have been run but nothing is printed on the screen. Should I do something else to get an output ?

    Read the article

  • FluentNHibernate Many-To-One References where Foreign Key is not to Primary Key and column names are

    - by Todd Langdon
    I've been sitting here for an hour trying to figure this out... I've got 2 tables (abbreviated): CREATE TABLE TRUST ( TRUSTID NUMBER NOT NULL, ACCTNBR VARCHAR(25) NOT NULL ) CONSTRAINT TRUST_PK PRIMARY KEY (TRUSTID) CREATE TABLE ACCOUNTHISTORY ( ID NUMBER NOT NULL, ACCOUNTNUMBER VARCHAR(25) NOT NULL, TRANSAMT NUMBER(38,2) NOT NULL POSTINGDATE DATE NOT NULL ) CONSTRAINT ACCOUNTHISTORY_PK PRIMARY KEY (ID) I have 2 classes that essentially mirror these: public class Trust { public virtual int Id {get; set;} public virtual string AccountNumber { get; set; } } public class AccountHistory { public virtual int Id { get; set; } public virtual Trust Trust {get; set;} public virtual DateTime PostingDate { get; set; } public virtual decimal IncomeAmount { get; set; } } How do I do the many-to-one mapping in FluentNHibernate to get the AccountHistory to have a Trust? Specifically, since it is related on a different column than the Trust primary key of TRUSTID and the column it is referencing is also named differently (ACCTNBR vs. ACCOUNTNUMBER)???? Here's what I have so far - how do I do the References on the AccountHistoryMap to Trust??? public class TrustMap : ClassMap<Trust> { public TrustMap() { Table("TRUST"); Id(x => x.Id).Column("TRUSTID"); Map(x => x.AccountNumber).Column("ACCTNBR"); } } public class AccountHistoryMap : ClassMap<AccountHistory> { public AccountHistoryMap() { Table("TRUSTACCTGHISTORY"); Id (x=>x.Id).Column("ID"); References<Trust>(x => x.Trust).Column("ACCOUNTNUMBER").ForeignKey("ACCTNBR").Fetch.Join(); Map(x => x.PostingDate).Column("POSTINGDATE"); ); I've tried a few different variations of the above line but can't get anything to work - it pulls back AccountHistory data and a proxy for the Trust; however it says no Trust row with given identifier. This has to be something simple. Anyone? Thanks in advance.

    Read the article

  • Ruby on Rails: jQuery datepicker - dates between validation

    - by Jazz
    I have an app that allows a user to create new projects, and the search for them later. One of the options they have when creating a project is giving them start and end dates. At the moment all the code works properly for creating and searching on the dates, but I am now wanting to restrict what dates the user can enter. I am needing for an error to flag up when the user tries to enter an end date that is before the start date. It's really more for when the user is creating the project. Here is my code so far = Application.js //= require jquery //= require jquery_ujs //= require jquery-ui //= require jquery.ui.all //= require_tree . $(function() { $("#project_start_date").datepicker({dateFormat: 'dd-mm-yy'}); }); $(function() { $("#project_end_date").datepicker({dateFormat: 'dd-mm-yy'}); }); jQuery(function(){ jQuery('#start_date_A').datepicker({dateFormat: "dd-mm-yy"}); }); jQuery(function(){ jQuery('#start_date_B').datepicker({dateFormat: "dd-mm-yy"}); }); New View: <div class="start_date" STYLE="text-align: left;"> <b>Start Date:</b> <%= f.text_field :start_date, :class => 'datepicker', :style => 'width: 80px;' %> </div> <div class="end_date" STYLE="text-align: left;"> <b>End Date:</b> <%= f.text_field :end_date, :class => 'datepicker', :style => 'width: 80px;' %> </div> Search View: Start dates between <%= text_field_tag :start_date_A, params[:start_date_A], :style => 'width: 80px;' %> - <%= text_field_tag :start_date_B, params[:start_date_B], :style => 'width: 80px;' %></br> I tried following examples online to get this to work by doing this in the application.js file: $(function() { $("#project_start_date,#project_end_date").datepicker({dateFormat: 'dd-mm-yy'}); }); jQuery(function(){ jQuery('#start_date_A,#start_date_B').datepicker({dateFormat: "dd-mm-yy"}); }); But then the script doesn't run. I am new to rails and javascript so any help at all is appreciated. Thanks in advance. UPDATE: Don't know why my question has been voted to be closed. It's quite simple: I need an error to flag up when the user tries to enter an end date that is before the start date. How can I do that??

    Read the article

  • static readonly field initializer vs static constructor initialization

    - by stackoverflowuser
    Below are 2 different ways to initialize static readonly fields. Is there a difference between the 2 approaches? If yes, when should one be preferred over the other? class A { private static readonly string connectionString = WebConfigurationManager.ConnectionStrings["SomeConnection"].ConnectionString; } class B { private static readonly string connectionString; static B() { connectionString = WebConfigurationManager.ConnectionStrings["SomeConnection"].ConnectionString; } } Thanks.

    Read the article

  • Conversion between classes

    - by Nima
    Hi, Let's say we have a class called A and another one called B. and we want to have a conversion method that converts A to B. In the software architecture point of view, which one is preferred? write A.export() write B.import() write a converter class, i.e. convert(A, B) or Convert(A) or ... if the language matters, I'm using C++ Thanks,

    Read the article

  • div automatically added in $item->get_description(); using simplepie

    - by Carey Estes
    I am getting a div that is appearing in the output from calling a RSS feed. It is ignoring my attempts to wrap it in a paragraph tag and pushes the data out to the div. foreach ($feed->get_items(0 , 3) as $item): $feedDescription = $item->get_content(); $image = returnImage($feedDescription); $image = scrapeImage($image); $image_url= $item->get_permalink(); $description = $item->get_description(); ?> <div class="item"> <h4><a href="<?php echo $item->get_permalink(); ?>"><?php echo $item->get_title(); ?></a></h4> <div class="image-box"><?php echo '<a href="' . $image_url . '"><img src="' . $image . '" /></a>'."\n";?></div> <p><?php echo $description ?></p> <p><a href="<?php echo $item->get_permalink(); ?>">Continue Reading</a></p> </div> <?php endforeach; ?> Here is the html output: <div class="item"> <h4><a href="#">Lorem Ipsum</a></h4> <div class="image-box"><a href="#"><img src="image.jpg"></a> </div> <p></p> <div>Lorem Ipsum description [...]</div> <p></p> <p><a href="#">Continue Reading</a></p> </div> Why does the description call add a div tag and not get wrapped in the paragraph tag?

    Read the article

  • Android - OPENGL cube is NOT in the display

    - by Marc Ortiz
    I'm trying to display a square on my display and i can't. Whats my problem? How can I display it on the screen (center of the screen)? I let my code below! Here's my render class: public class GLRenderEx implements Renderer { private GLCube cube; Context c; GLCube quad; // ( NEW ) // Constructor public GLRenderEx(Context context) { // Set up the data-array buffers for these shapes ( NEW ) quad = new GLCube(); // ( NEW ) } // Call back when the surface is first created or re-created. @Override public void onSurfaceCreated(GL10 gl, EGLConfig config) { // NO CHANGE - SKIP } // Call back after onSurfaceCreated() or whenever the window's size changes. @Override public void onSurfaceChanged(GL10 gl, int width, int height) { // NO CHANGE - SKIP } // Call back to draw the current frame. @Override public void onDrawFrame(GL10 gl) { // Clear color and depth buffers using clear-values set earlier gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); gl.glLoadIdentity(); // Reset model-view matrix ( NEW ) gl.glTranslatef(-1.5f, 0.0f, -6.0f); // Translate left and into the // screen ( NEW ) // Translate right, relative to the previous translation ( NEW ) gl.glTranslatef(3.0f, 0.0f, 0.0f); quad.draw(gl); // Draw quad ( NEW ) } } And here is my square class: public class GLCube { private FloatBuffer vertexBuffer; // Buffer for vertex-array private float[] vertices = { // Vertices for the square -1.0f, -1.0f, 0.0f, // 0. left-bottom 1.0f, -1.0f, 0.0f, // 1. right-bottom -1.0f, 1.0f, 0.0f, // 2. left-top 1.0f, 1.0f, 0.0f // 3. right-top }; // Constructor - Setup the vertex buffer public GLCube() { // Setup vertex array buffer. Vertices in float. A float has 4 bytes ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4); vbb.order(ByteOrder.nativeOrder()); // Use native byte order vertexBuffer = vbb.asFloatBuffer(); // Convert from byte to float vertexBuffer.put(vertices); // Copy data into buffer vertexBuffer.position(0); // Rewind } // Render the shape public void draw(GL10 gl) { // Enable vertex-array and define its buffer gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer); // Draw the primitives from the vertex-array directly gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); } } Thanks!!

    Read the article

  • Unique_ptr compiler errors

    - by Godric Seer
    I am designing and entity-component system for a project, and C++ memory management is giving me a few issues. I just want to make sure my design is legitimate. So to start I have an Entity class which stores a vector of Components: class Entity { private: std::vector<std::unique_ptr<Component> > components; public: Entity() { }; void AddComponent(Component* component) { this -> components.push_back(std::unique_ptr<Component>(component)); } ~Entity(); }; Which if I am not mistaken means that when the destructor is called (even the default, compiler created one), the destructor for the Entity, will call ~components, which will call ~std::unique_ptr for each element in the vector, and lead to the destruction of each Component, which is what I want. The component class has virtual methods, but the important part is its constructor: Component::Component(Entity parent) { parent.addComponent(this) // I am not sure if this would work like I expect // Other things here } As long as passing this to the method works, this also does what I want. My confusion is in the factory. What I want to do is something along the lines of: std::shared_ptr<Entity> createEntity() { std::shared_ptr<Entity> entityPtr(new Entity()); new Component(*parent); // Initialize more, and other types of Components return entityPtr; } Now, I believe that this setup will leave the ownership of the Component in the hands of its Parent Entity, which is what I want. First a small question, do I need to pass the entity into the Component constructor by reference or pointer or something? If I understand C++, it would pass by value, which means it gets copied, and the copied entity would die at the end of the constructor. The second, and main question is that code based on this sample will not compile. The complete error is too large to print here, however I think I know somewhat of what is going on. The compiler's error says I can't delete an incomplete type. My Component class has a purely virtual destructor with an implementation: inline Component::~Component() { }; at the end of the header. However since the whole point is that Component is actually an interface. I know from here that a complete type is required for unique_ptr destruction. The question is, how do I work around this? For reference I am using gcc 4.4.6.

    Read the article

< Previous Page | 592 593 594 595 596 597 598 599 600 601 602 603  | Next Page >