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• Why is Java the lingua franca at so many institutions?

  - by Billy ONeal

  EDIT: This question at first seems to be bashing Java, and I guess at this point it is a bit. However, the bigger point I am trying to make is why any one single language is chosen as the one end all be all solution to all problems. Java happens to be the one that's used so that's the one I had to beat on here, but I'm not intentionality ripping Java a new one :) I don't like Java in most academic settings. I'm not saying the language itself is bad -- it has several extremely desirable aspects, most importantly the ability to run without recompilation on most any platform. Nothing wrong with using the language for Your Next App ^TM. (Not something I would personally do, but that's more because I have less experience with it, rather than it's design being poor) I think it is a waste that high level CS courses are taught using Java as a language. Too many of my co-students cannot program worth a damn, because they don't know how to work in a non-garbage-collected world. They don't fundamentally understand the machines they are programming for. When someone can work outside of a garbage collected world, they can work inside of one, but not vice versa. GC is a tool, not a crutch. But the way it is used to teach computer science students is a as a crutch. Computer science should not teach an entire suite of courses tailored to a single language. Students leave with the idea that all good design is idiomatic Java design, and that Object Oriented Design is the ONE TRUE WAY THAT IS THE ONLY WAY THINGS CAN BE DONE. Other languages, at least one of them not being a garbage collected language, should be used in teaching, in order to give the graduate a better understanding of the machines. It is an embarrassment that somebody with a PHD in CS from a respected institution cannot program their way out of a paper bag. What's worse, is that when I talk to those CS professors who actually do understand how things operate, they share feelings like this, that we're doing a disservice to our students by doing everything in Java. (Note that the above would be the same if I replaced it with any other language, generally using a single language is the problem, not Java itself) In total, I feel I can no longer respect any kind of degree at all -- when I can't see those around me able to program their way out of fizzbuzz problems. Why/how did it get to be this way?

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• Accessing controls of .aspx file in .aspx.cs without any declaration.!!??

  I am able to access the controls of ".aspx" file in ".aspx.cs" directly without any declaration in ".aspx.cs" or in designer.cs. How is this possible? This is happeing only if I open website as using File System. Create a new ASP.NET web site application with Visual Studio 2008. So following three files will be created automatically              "Default.aspx",              "Default.aspx.cs"              "Default.designer.cs" Now Delete "Default.designer.cs" perminently. Just create a button in Default.aspx file    <asp:Button runat="server" Text="Save Plan" ID="btnSave" />   Close the Solution and open the website as File System.               File -> Open Web Site -> File System -> Select Web Site Folder and Open the project.                   Now btnSave is automatically recognized in Default.aspx.cs without any declaration in Default.aspx.cs as bellow                            System.Web.UI.WebControls.Button btnSave; How btnSave is being recognized by .cs file without defining it anywhere as an object of System.Web.UI.WebControls.Button? Note: This happens only if you open Web Site from File System.           and No Declaration at all for btnSave. Please refer this article on this. span.fullpost {display:none;}

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• When attaching AI to a vehicle should I define all steps or try Line of Sight?

  - by ThorDivDev

  This problem is related to an intersection simulation I am building for university. I will try to make it as general as possible. I am trying to assign AI to a vehicle using the JMonkeyEngine platform. AIGama_JmonkeyEngine explains that if you wish to create a car that follows a path you can define the path in steps. If there was no physics attached whatsoever then all you need to do is define the x,y,z values of where you want the object to appear in all subsequent steps. I am attaching the vehicleControl that implements jBullet. In this case the author mentions that I would need to define the steering and accelerating behaviors at each step. I was trying to use ghost controls that represented waypoints and when on colliding the car would decide what to do next like stopping at a red light. This didn't work so well. Car doesn't face right. public void update(float tpf) { Vector3f currentPos = aiVehicle.getPhysicsLocation(); Vector3f baseforwardVector = currentPos.clone(); Vector3f forwardVector; Vector3f subsVector; if (currentState == ObjectState.Running) { aiVehicle.accelerate(-800); } else if (currentState == ObjectState.Seeking) { baseforwardVector = baseforwardVector.normalize(); forwardVector = aiVehicle.getForwardVector(baseforwardVector); subsVector = pointToSeek.subtract(currentPos.clone()); System.out.printf("baseforwardVector: %f, %f, %f\n", baseforwardVector.x, baseforwardVector.y, baseforwardVector.z); System.out.printf("subsVector: %f, %f, %f\n", subsVector.x, subsVector.y, subsVector.z); System.out.printf("ForwardVector: %f, %f, %f\n", forwardVector.x, forwardVector.y, forwardVector.z); if (pointToSeek != null && pointToSeek.x + 3 >= currentPos.x && pointToSeek.x - 3 <= currentPos.x) { aiVehicle.steer(0.0f); aiVehicle.accelerate(-40); } else if (pointToSeek != null && pointToSeek.x > currentPos.x) { aiVehicle.steer(-0.5f); aiVehicle.accelerate(-40); } else if (pointToSeek != null && pointToSeek.x < currentPos.x) { aiVehicle.steer(0.5f); aiVehicle.accelerate(-40); } } else if (currentState == ObjectState.Stopped) { aiVehicle.accelerate(0); aiVehicle.brake(40); } }

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• Imperative vs. component based programming [closed]

  - by AlexW

  I've been thinking about how programming and more specifically the teaching of programming is advocated amongst the community (online). Often I've heard that Ruby and RoR is an ideal platform for learning to program. I completely disagree... RoR and Ruby are based on the application of the component based paradigm, which means they are ideal for rapid application development. This is much like the MVC model in PHP and ASP.NET But, learning a proper imperative language like Java or C/C++ (or even Perl and PHP) is the only way for a new programmer to explore logic itself, and not get too bogged down in architectural concerns like the need for separation of concerns, and the preference for components. Maybe it's a personal preference thing. I rather think that the most interesting aspects to programming are the procedural bits of code I write that actually do stuff rather than the project planning, and modelling that comes about from fully object oriented engineering or simply using the MVC model. I know this may sound confused to some of you. I feel strongly though that the best way for programming to be taught is through imperative and procedural methods. Architectural (component) methods come later, if at all. After all, none of the amazing algorithms that exist were based on OOP practice! It's all procedural code when it comes to the 'magic'. OOP is useful in creating products and utilities. Algorithms are what makes things happen, and move data around, and so imperative (and/or procedural) code are what matters most. When I see programmers recommending Ruby on Rails to newbie developers, I think it's just so wrong. Just because you write less code with Ruby does not make it easier to do! It's the opposite... you have to know loads more to appreciate its succinct nature. New coders who really want to understand the nuts and bolts of coding need to go away and figure out writing methods/functions (i.e. imperative programming) and working in procedural style, in order to grasp the fundamentals, first, before looking into architectural ways of working. So, my question is: should Ruby ever be recommended as a first language? I think no (obviously)... what arguments are there for it?

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• Getting a SecurityToken from a RequestSecurityTokenResponse in WIF

  - by Shawn Cicoria

  When you’re working with WIF and WSTrustChannelFactory when you call the Issue operation, you can also request that a RequestSecurityTokenResponse as an out parameter. However, what can you do with that object?  Well, you could keep it around and use it for subsequent calls with the extension method CreateChannelWithIssuedToken – or can you? public static T CreateChannelWithIssuedToken<T>(this ChannelFactory<T> factory, SecurityToken issuedToken);   As you can see from the method signature it takes a SecurityToken – but that’s not present on the RequestSecurityTokenResponse class. However, you can through a little magic get a GenericXmlSecurityToken by means of the following set of extension methods below – just call rstr.GetSecurityTokenFromResponse() – and you’ll get a GenericXmlSecurityToken as a return. public static class TokenHelper { /// <summary> /// Takes a RequestSecurityTokenResponse, pulls out the GenericXmlSecurityToken usable for further WS-Trust calls /// </summary> /// <param name="rstr"></param> /// <returns></returns> public static GenericXmlSecurityToken GetSecurityTokenFromResponse(this RequestSecurityTokenResponse rstr) { var lifeTime = rstr.Lifetime; var appliesTo = rstr.AppliesTo.Uri; var tokenXml = rstr.GetSerializedTokenFromResponse(); var token = GetTokenFromSerializedToken(tokenXml, appliesTo, lifeTime); return token; } /// <summary> /// Provides a token as an XML string. /// </summary> /// <param name="rstr"></param> /// <returns></returns> public static string GetSerializedTokenFromResponse(this RequestSecurityTokenResponse rstr) { var serializedRst = new WSFederationSerializer().GetResponseAsString(rstr, new WSTrustSerializationContext()); return serializedRst; } /// <summary> /// Turns the XML representation of the token back into a GenericXmlSecurityToken. /// </summary> /// <param name="tokenAsXmlString"></param> /// <param name="appliesTo"></param> /// <param name="lifetime"></param> /// <returns></returns> public static GenericXmlSecurityToken GetTokenFromSerializedToken(this string tokenAsXmlString, Uri appliesTo, Lifetime lifetime) { RequestSecurityTokenResponse rstr2 = new WSFederationSerializer().CreateResponse( new SignInResponseMessage(appliesTo, tokenAsXmlString), new WSTrustSerializationContext()); return new GenericXmlSecurityToken( rstr2.RequestedSecurityToken.SecurityTokenXml, new BinarySecretSecurityToken( rstr2.RequestedProofToken.ProtectedKey.GetKeyBytes()), lifetime.Created.HasValue ? lifetime.Created.Value : DateTime.MinValue, lifetime.Expires.HasValue ? lifetime.Expires.Value : DateTime.MaxValue, rstr2.RequestedAttachedReference, rstr2.RequestedUnattachedReference, null); } }

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• How to chain actions/animations together and delay their execution?

  - by codinghands

  I'm trying to build a simple game with a number of screens - 'TitleScreen', 'LoadingScreen', 'PlayScreen', 'HighScoreScreen' - each of which has it's own draw & update logic methods, sprites, other useful fields, etc. This works well for me as a game dev beginner, and it runs. However, on my 'PlayScreen' I want to run some animations before the player gets control - dropping in some artwork, playing some sound effects, generally prettifying things a little. However, I'm not sure what the best way to chain animations / sound effects / other timed general events is. I could make an intermediary screen, 'PrePlayScreen', which simply has all of this hardcoded like so: Update(){ Animation anim1 = new Animation(.....); Animation anim2 = new Animation(.....); anim1.Run(); if(anim1.State == AnimationState.Complete) anim2.Run(); if(anim2.State == AnimationState.Complete) // Load 'PlayScreen' screen } But this doesn't seem so great - surely their must be a better way? I then thought, 'Hey - an AnimationManager! That'd be awesome!'. But then that creeping OOP panic set in as I thought about it some more. If I create the Animation in my Screen, then add it to the AnimationManager (which may or may not be a GameComponent hooked up to Update/Draw), how can I get 'back' to it? To signal commands like start / end / repeat? I'd still need to keep a reference to the object in my Screen so that I could still communicate with it once it's buried in the bosom of a List in my AnimationManager. This seems bad. I've also tried using events - call 'Update' on all the animations in the PlayScreen update loop, but crucially all of the animations have a bool flag ('Active') which determines whether they should begin. The first animation has this set to 'true', all others 'false'. On completion the first animation raises an event, which sets animation 2's bool flag to true (and so it then runs). Once animation 2 is complete another 'anim complete' event is raised, and the screen state changes. Considering the game I'm making is basically as simple as it gets I know I'm overthinking this... it's just the paradigm shift from web - game development is making me break out in a serious case of the stupids.

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• Problem texturing with opengl

  - by Killrazor

  Hello! I'm having problems making a simple sprite rendering. I load 2 different textures. Then, I bind these textures and draw 2 squares, one with each texture. But only the texture of the first rendered object is drawn in both squares. Its like if I'd only use a texture or as if glBindTexture don't work properly. I know that GL is a state machine, but I think that you only need to change active texture with glBindTexture. I load texture with this method: bool CTexture::generate( utils::CImageBuff* img ) { assert(img); m_image = img; CHECKGL(glGenTextures(1,&m_textureID)); CHECKGL(glBindTexture(GL_TEXTURE_2D,m_textureID)); CHECKGL(glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR)); CHECKGL(glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)); //CHECKGL(glTexImage2D(GL_TEXTURE_2D,0,img->getBpp(),img->getWitdh(),img->getHeight(),0,img->getFormat(),GL_UNSIGNED_BYTE,img->getImgData())); CHECKGL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img->getWitdh(), img->getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, img->getImgData())); return true; } And I bind textures with this function: void CTexture::bind() { CHECKGL(glBindTexture(GL_TEXTURE_2D,m_textureID)); } Also, I draw sprites with this method void CSprite2D::render() { CHECKGL(glLoadIdentity()); CHECKGL(glEnable(GL_TEXTURE_2D)); CHECKGL(glEnable(GL_BLEND)); CHECKGL(glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)); m_texture->bind(); CHECKGL(glPushMatrix()); CHECKGL(glBegin(GL_QUADS)); CHECKGL(glTexCoord2f(m_textureAreaStart.s,m_textureAreaStart.t)); // 0,0 by default CHECKGL(glVertex3i(m_position.x,m_position.y,0)); CHECKGL(glTexCoord2f(m_textureAreaEnd.s,m_textureAreaStart.t)); // 1,0 by default CHECKGL(glVertex3i( m_position.x + m_dimensions.x, m_position.y, 0)); CHECKGL(glTexCoord2f(m_textureAreaEnd.s, m_textureAreaEnd.t)); // 1,1 by default CHECKGL(glVertex3i( m_position.x + m_dimensions.x, m_position.y + m_dimensions.y, 0)); CHECKGL(glTexCoord2f(m_textureAreaStart.s, m_textureAreaEnd.t)); // 0,1 by default CHECKGL(glVertex3i( m_position.x, m_position.y + m_dimensions.y,0)); CHECKGL(glPopMatrix()); CHECKGL(glDisable(GL_BLEND)); } Could you help me? All help is welcome. Thanks!!

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• [AJAX Numeric Updown Control] Microsoft JScript runtime error: The number of fractional digits is out of range

  - by Jenson

  If you have using Ajax control toolkits a lot (which I will skip the parts on where to download and how to configure it in Visual Studio 2010), you might have encountered some bugs or limitations of the controls, or rather, some weird behaviours. I would call them weird behaviours though. Recently, I've been working on a Ajax numeric updown control, which i remember clearly it was working fine without problems. In fact, I use 2 numeric updown control this time. So I went on to configure it to be as simple as possible and I will just use the default up and down buttons provided by it (so that I won't need to design my own). I have two textbox controls to display the value controlled by the updown control. One for month, and another for year. <asp:TextBox ID="txtMonth" runat="server" CssClass="txtNumeric" ReadOnly="True" Width="150px" /> <asp:TextBox ID="txtYear" runat="server" CssClass="txtNumeric" ReadOnly="True" Width="150px" /> So I will now drop 1 numeric updown control for each of the textboxes. <asp:NumericUpDownExtender ID="txtMonth_NumericUpDownExtender"     runat="server" TargetControlID="txtMonth" Maximum="12" Minimum="1" Width="152"> </asp:NumericUpDownExtender>                          <asp:NumericUpDownExtender ID="txtYear_NumericUpDownExtender"     runat="server" TargetControlID="txtYear" Width="152"> </asp:NumericUpDownExtender>                                                  You noticed that I configure the Maximum and Minimum value for the first numericupdown control, but I never did the same for the second one (for txtYear). That's because it won't work, well, at least for me. So I remove the Minimum="2000" and Maximum="2099" from there. Then I would configure the initial value to the the current year, and let the year to flow up and down freely. If you want, you want write the codes to restrict it. Here are the codes I used on PageLoad:     Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load         If Not Page.IsPostBack Then             If Trim(txtMonth.Text) = "" Then                 Me.txtMonth.Text = System.DateTime.Today.Month             End If             If Trim(txtYear.Text) = "" Then                 Me.txtYear.Text = System.DateTime.Today.Year             End If         End If     End Sub   Enjoy!

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• IndexOutOfRangeException on World.Step after enabling/disabling a Farseer physics body?

  - by WilHall

  Earlier, I posted a question asking how to swap fixtures on the fly in a 2D side-scroller using Farseer Physics Engine. The ultimate goal being that the player's physical body changes when the player is in different states (I.e. standing, walking, jumping, etc). After reading this answer, I changed my approach to the following: Create a physical body for each state when the player is loaded Save those bodies and their corresponding states in parallel lists Swap those physical bodies out when the player state changes (which causes an exception, see below) The following is my function to change states and swap physical bodies: new protected void SetState(object nState) { //If mBody == null, the player is being loaded for the first time if (mBody == null) { mBody = mBodies[mStates.IndexOf(nState)]; mBody.Enabled = true; } else { //Get the body for the given state Body nBody = mBodies[mStates.IndexOf(nState)]; //Enable the new body nBody.Enabled = true; //Disable the current body mBody.Enabled = false; //Copy the current body's attributes to the new one nBody.SetTransform(mBody.Position, mBody.Rotation); nBody.LinearVelocity = mBody.LinearVelocity; nBody.AngularVelocity = mBody.AngularVelocity; mBody = nBody; } base.SetState(nState); } Using the above method causes an IndexOutOfRangeException when calling World.Step: mWorld.Step(Math.Min((float)nGameTime.ElapsedGameTime.TotalSeconds, (1f / 30f))); I found that the problem is related to changing the .Enabled setting on a body. I tried the above function without setting .Enabled, and there was no error thrown. Turning on the debug views, I saw that the bodies were updating positions/rotations/etc properly when the state was changes, but since they were all enabled, they were just colliding wildly with each other. Does Enabling/Disabling a body remove it from the world's body list, which then causes the error because the list is shorter than expected? Update: For such a straightforward issue, I feel this question has not received enough attention. Has anyone else experienced this? Would anyone try a quick test case? I know this issue can be sidestepped - I.e. by not disabling a body during the simulation - but it seems strange that this issue would exist in the first place, especially when I see no mention of it in the documentation for farseer or box2d. I can't find any cases of the issue online where things are more or less kosher, like in my case. Any leads on this would be helpful.

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• Why does my goblin only choose a walk direction once?

  - by Eogcloud

  I'm working on a simpe 2d canvas game that has a small goblin sprite who I want to get pathing around the screen. What I originally tried was a random roll that would choose a direction, the goblin would walk that direction. It didnt work effectively, he sort of wobbled in one spot. Here's my current apporach but he only runs in a rundom direction and doesnt change. What am I doing wrong? Here's all the relevant code to the goblin object and movement. var goblin = { speed: 100, pos: [0, 0], dir: 1, changeDir: true, stepCount: 0, stepTotal: 0, sprite: new Sprite( goblinImage, [0,0], [30,45], 6, [0,1,2,3,2,1], true) }; function getNewDir(){ goblin.dir = Math.floor(Math.random()*4)+1; }; function checkGoblinMovement(){ if(goblin.changeDir){ goblin.changeDir = false; goblin.stepCount = 0; goblin.stepTotal = Math.floor(Math.random*650)+1; getNewDir(); } else { if(goblin.stepCount === goblin.stepTotal){ goblin.changeDir = true; } } }; function update(delta){ healthCheck(); if(isGameOver){ gameOver(); } if(!isGameOver){ updateCharLevel(); keyboardInput(delta); moveGoblin(delta); checkGoblinMovement(); goblin.sprite.update(delta); //update sprites if(mainChar.kills!=0 && bloodReady){ for(var i=0; i<bloodArray.length; i++){ bloodArray[i].sprite.update(delta); } } //collision detection if(collision(mainChar, goblin)) { combatOutcome(combatEvent()); combatCleanup(); } } }; function main(){ var now = Date.now(); var delta = (now - then)/1000; if(!isGameOver){ update(delta); } draw(); then = now; }; function moveGoblin(delta){ goblin.stepCount++; if(goblin.dir === 1){ goblin.pos[1] -= goblin.speed * delta* 2; if(goblin.pos[1] <= 85){ goblin.pos[1] = 86; } } if(goblin.dir === 2){ goblin.pos[1] += goblin.speed * delta; if(goblin.pos[1] > 530){ goblin.pos[1] = 531; } } if(goblin.dir === 3){ goblin.pos[0] -= goblin.speed * delta; if(goblin.pos[0] < 0){ goblin.pos[0] = 1; } } if(goblin.dir === 4){ goblin.pos[0] += goblin.speed * delta* 2; if(goblin.pos[0] > 570){ goblin.pos[0] = 571; } } };

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• Accessing controls of .aspx file in .aspx.cs without any declaration.!!??

  I am able to access the controls of ".aspx" file in ".aspx.cs" directly without any declaration in ".aspx.cs" or in designer.cs. How is this possible? This is happeing only if I open website as using File System. Create a new ASP.NET web site application with Visual Studio 2008. So following three files will be created automatically              "Default.aspx",              "Default.aspx.cs"              "Default.designer.cs" Now Delete "Default.designer.cs" perminently. Just create a button in Default.aspx file    <asp:Button runat="server" Text="Save Plan" ID="btnSave" />   Close the Solution and open the website as File System.               File -> Open Web Site -> File System -> Select Web Site Folder and Open the project.                   Now btnSave is automatically recognized in Default.aspx.cs without any declaration in Default.aspx.cs as bellow                            System.Web.UI.WebControls.Button btnSave; How btnSave is being recognized by .cs file without defining it anywhere as an object of System.Web.UI.WebControls.Button? Note: This happens only if you open Web Site from File System.           and No Declaration at all for btnSave. Please refer this article on this. span.fullpost {display:none;}

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• [EF + Oracle] Inserting Data (Sequences) (2/2)

  - by JTorrecilla

  Prologue In the previous chapter we have see how to create DB records with EF, now we are going to Some Questions about Oracle.   ORACLE One characteristic from SQL Server that differs from Oracle is “Identity”. To all that has not worked with SQL Server, this property, that applies to Integer Columns, lets indicate that there is auto increment columns, by that way it will be filled automatically, without writing it on the insert statement. In EF with SQL Server, the properties whose match with Identity columns, will be filled after invoking SaveChanges method. In Oracle DB, there is no Identity Property, but there is something similar. Sequences Sequences are DB objects, that allow to create auto increment, but there are not related directly to a Table. The syntax is as follows: name, min value, max value and begin value. 1: CREATE SEQUENCE nombre_secuencia 2: INCREMENT BY numero_incremento 3: START WITH numero_por_el_que_empezara 4: MAXVALUE valor_maximo | NOMAXVALUE 5: MINVALUE valor_minimo | NOMINVALUE 6: CYCLE | NOCYCLE 7: ORDER | NOORDER 8:    How to get sequence value? To obtain the next val from the sequence: 1: SELECT nb_secuencia.Nextval 2: From Dual Due to there is no direct way to indicate that a column is related to a sequence, there is several ways to imitate the behavior: Use a Trigger (DB), Use Stored Procedures or Functions(…) or my particularly option. EF model, only, imports Table Objects, Stored Procedures or Functions, but not sequences. By that, I decide to create my own extension Method to invoke Next Val from a sequence: 1: public static class EFSequence 2: { 3: public static int GetNextValue(this ObjectContext contexto, string SequenceName) 4: { 5: string Connection = ConfigurationManager.ConnectionStrings["JTorrecillaEntities2"].ConnectionString; 6: Connection=Connection.Substring(Connection.IndexOf(@"connection string=")+19); 7: Connection = Connection.Remove(Connection.Length - 1, 1); 8: using (IDbConnection con = new Oracle.DataAccess.Client.OracleConnection(Connection)) 9: { 10: using (IDbCommand cmd = con.CreateCommand()) 11: { 12: con.Open(); 13: cmd.CommandText = String.Format("Select {0}.nextval from DUAL", SequenceName); 14: return Convert.ToInt32(cmd.ExecuteScalar()); 15: } 16: } 17:  18: } 19: } This Object Context’s extension method are going to invoke a query with the Sequence indicated by parameter. It takes the connection strings from the App settings, removing the meta data, that was created by VS when generated the EF model. And then, returns the next value from the Sequence. The next value of a Sequence is unique, by that, when some concurrent users are going to create records in the DB using the sequence will not get duplicates. This is my own implementation, I know that it could be several ways to do and better ways. If I find any other way, I promise to post it. To use the example is needed to add a reference to the Oracle (ODP.NET) dll.

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• Should we persist with an employee still writing bad code after many years?

  - by user94986

  I've been assigned the task of managing developers for a well-established company. They have a single developer who specialises in all their C++ coding (since forever), but the quality of the work is abysmal. Code reviews and testing have revealed many problems, one of the worst being memory leaks. The developer has never tested his code for leaks, and I discovered that the applications could leak many MBs with only a minute of use. User's were reporting huge slowdowns, and his take was, "it's nothing to do with me - if they quit and restart, it's all good again." I've given him tools to detect and trace the leaks, and sat down with him for many hours to demonstrate how the tools are used, where the problems occur, and what to do to fix them. We're 6 months down the track, and I assigned him to write a new module. I reviewed it before it was integrated into our larger code base, and was dismayed to discover the same bad coding as before. The part that I find incomprehensible is that some of the coding is worse than amateurish. For example, he wanted a class (Foo) that could populate an object of another class (Bar). He decided that Foo would hold a reference to Bar, e.g.: class Foo { public: Foo(Bar& bar) : m_bar(bar) {} private: Bar& m_bar; }; But (for other reasons) he also needed a default constructor for Foo and, rather than question his initial design, he wrote this gem: Foo::Foo() : m_bar(*(new Bar)) {} So every time the default constructor is called, a Bar is leaked. To make matters worse, Foo allocates memory from the heap for 2 other objects, but he didn't write a destructor or copy constructor. So every allocation of Foo actually leaks 3 different objects, and you can imagine what happened when a Foo was copied. And - it only gets better - he repeated the same pattern on three other classes, so it isn't a one-off slip. The whole concept is wrong on so many levels. I would feel more understanding if this came from a total novice. But this guy has been doing this for many years and has had very focussed training and advice over the past few months. I realise he has been working without mentoring or peer reviews most of that time, but I'm beginning to feel he can't change. So my question is, would you persist with someone who is writing such obviously bad code?

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• Are there software options (preferabbly .NET) for doing distance and speed analysis of footballers moving on video?

  - by Anonymous Type

  Editing Question for Clarity Thanks for feedback so far, very insightful. I'm not sure how far along this part of the software community is, and what if any libraries exist for me to leverage from. Heres what I'm trying to do. Problem: Take an existing video of a game of rugby league. The Rugby League field is 100 metres long, 70 metres wide, and has white line markings every 10 metres running along the width of the field, as well as along the sidelines. Each side has 13 players on the field. Players on each team have identical jerseys that normally constrast strongly against background colours (green/brown field colour) and the referee's colour (usually yellow) and the designated water runner (orange). All players have a unique number in thick white lettering on their backs for identification. Video is taken with a high definition camera. Currently only one camera is used (2D) and existing video does not contain a foreground object of fixed spatial dimensions (as suggested in one answer for comparision measurements, however I could add this to future filming sessions if it is worthwhile). The player's do not run in a straight line 50% of the time but will go sideways on on a diagonal to the play the ball. The distance measured always starts from the spot of the previous "tackle", which ends where the player stops forward movement. It is not always possible to determine the players number from the video (facing other direction, sunlight, others standing in the way of the camera). But this isn't important as the software could allow for manual inputting of unknown "runs" at a later point after analysis. Determine the distance between two points (i.e. where the player started his "run" and where he finished it). I'm guessing that this would be quite doable if I manually marked the start and end point in the video. But how would I use landmarks in the background to determine the distance (assuming the person taking the video has kept it from jerking around). Question: Do software packages or libraries exist that are specialised enough to assist with writing analysis software to determine a sports persons distance travelled based on video taken of the performance?

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• ADF Real World Developers Guide Book Review

  - by Grant Ronald

  I'm half way through my review of "Oracle ADF Real World Developer's Guide" by Jobinesh Purushothaman - unfortunately some work deadlines de-railed me from having completed my review by now but here goes.  First thing, Jobinesh works in the Oracle Product Management team with me, so is a colleague. That declaration aside, its clear that this is someone who has done the "real world" side of ADF development and that comes out in the book. In this book he addresses both the newbies and the experience developers alike.  He introduces the ADF building blocks like entity objects and view obejcts, but also goes into some of the nitty gritty details as well.  There is a pro and con to this approach; having only just learned about an entity or view object, you might then be blown away by some of the lower details of coding or lifecycle.  In that respect, you might consider this a book which you could read 3 or 4 times; maybe skipping some elements in the first read but on the next read you have a better grounding to learn the more advanced topics. One of the key issues he addresses is breaking down what happens behind the scenes.  At first, this may not seem important since you trust the framework to do everything for you - but having an understanding of what goes on is essential as you move through development.  For example, page 58 he explains the full lifecycle of what happens when you execute a query.  I think this is a great feature of his book. You see this elsewhere, for example he explains the full lifecycle of what goes on when a page is accessed : which files are involved,the JSF lifecycle etc. He also sprinkes the book with some best practices and advice which go beyond the standard features of ADF and really hits the mark in terms of "real world" advice. So in summary, this is a great ADF book, well written and covering a mass of information.  If you are brand new to ADF its still valid given it does start with the basics.  But you might want to read the book 2 or 3 times, skipping the advanced stuff on the first read.  For those who have some basics already then its going to be an awesome way to cement your knowledge and take it to the next levels.  And for the ADF experts, you are still going to pick up some great ADF nuggets.  Advice: every ADF developer should have one!

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• Running MS Access Programs

  - by fredhappier

  I have an old program developed in MS Access and would like to convert it to Kexi somehow. The program on Windows is launched with Access. Is there any way that Kexi can launch this program? I know my way around Ubuntu and the terminal, but not well versed on databases. Once you make something in Kexi how do you "run" it or "view" what you've made? So far I am able to import the MDB file into Kexi and see all of the database data, but that is as far I have gone. The program was made by a relative years ago for my dad. I myself am an Ubuntu only user for 6+ years now and have no intentions to touch Windows and am looking for a linux solution. My dad is also an Ubuntu user, hence why Im looking for a solution. If Kexi cannot launch and run an MDB file, what else can I try? Anything browser based? Any tips or direction would be extremely helpful. I spoke to my brother who originally made the program. I told him about Kexi and here is what he said. Does any of this make sense? Thanks. This is how I would try to get them to work: Stand alone setup - after import, look for an option where you designate which form object you want to open upon startup. It might be in the tools tab in the picture below. After you save that change, it re-start it and it should work. Front end/back end setup - Do what I suggested for the stand alone setup to the "front-end" MDB file. After you do that, put the other file (table MDB file) where you want it to reside on the network. Now, open back up the "front end" file and look for an option that will allow you to "connect" to those tables in the other file. It looks like it could be in the "External data" tab in the picture below. For this setup, you may need to do these two tasks in the reverse order I just mentioned. Thanks! Fred

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• What is the right way to group this project into classes?

  - by sigil

  I originally asked this on SO, where it was closed and recommended that I ask it here instead. I'm trying to figure out how to group all the functions necessary for my project into classes. The goal of the project is to execute the following process: Get the user's FTP credentials (username & password). Check to make sure the credentials establish a valid connection to the FTP server. Query several Sharepoint lists and join the results of those queries to create a list of items that need to have action taken on them. Each item in the list has a folder. For each item: Zip the contents of the folder. Upload the folder to the FTP server using SFTP Update the item's Sharepoint data. Email the user an Excel report showing, e.g., Items without folder paths Items that failed to zip or upload Steps 2-5 are performed on a periodic basis; if step 2 returns an invalid connection, the user is alerted and the process returns to step 1. If at any point the user presses a certain key, the process terminates. I've defined the following set of classes, each of which is in its own .cs file: SFTP: file transfer processes DataHandler: Sharepoint data retrieval/querying/updating processes. Also makes and uploads the zip files. Exceptions: Not just one class, this is the .cs file where I have all of my exception classes. Report: Builds and sends the report. Program: The main class for running the program. I recognize that the DataHandler class is a god object, but I don't have a good idea of how to refactor it. I feel like it should be more fine-grained than just breaking it into Sharepoint, Zip, and Upload, but maybe that's it. Also, I haven't yet worked out how to combine the periodic behavior with the "wait for user input at any point in the process" part; I think that involves threads, which means other classes to manage the threads... I'm not that well-versed in design patterns, but is there one that fits this project well? If this is too big of a topic to neatly explain in an SO answer, I'll also accept a link to a good tutorial on what I'm trying to do here.

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• Attach my sprite with Box2d

  - by user919496

  I'm coding Javascript(HTML5) with Box2D. And I want to ask how to attach Sprite with Box2D. This is function My sprite: function My_Sprite() { this.m_Image = new Image(); this.m_Position = new Vector2D(0,0); this.m_CurFrame = 0; this.m_ColFrame = 0; this.m_Size = new Vector2D(0,0); this.m_Scale = new Vector2D(0,0); this.m_Rotation = 0; } My_Sprite.prototype.constructor = function (_Image_SRC) { this.m_Image.src = _Image_SRC; } My_Sprite.prototype.constructor = function (_Image_SRC,_Size,_Col) { this.m_Image.src = _Image_SRC; this.m_Size = _Size; this.m_ColFrame = _Col; this.m_Scale = new Vector2D(1, 1); } My_Sprite.prototype.Draw = function (context) { context.drawImage(this.m_Image, this.m_Size.X * (this.m_CurFrame % this.m_ColFrame), this.m_Size.Y * parseInt(this.m_CurFrame / this.m_ColFrame), this.m_Size.X, this.m_Size.Y, this.m_Position.X, this.m_Position.Y, this.m_Size.X * this.m_Scale.X, this.m_Size.Y * this.m_Scale.Y ); } and this is function Object : function Circle(type, angle, size) { // Circle.prototype = new My_Object(); // Circle.prototype.constructor = Circle; // Circle.prototype.parent = My_Object.prototype; this.m_den = 1.0; this.m_fri = 0.5; this.m_res = 0.2; fixDef.density = this.m_den; fixDef.friction = this.m_fri; fixDef.restitution = this.m_res; fixDef.shape = new b2PolygonShape; bodyDef.type = type; bodyDef.angle = angle; bodyDef.userData = m_spriteCircle; fixDef.shape = new b2CircleShape( Radius / SCALE //radius ); this.m_Body = world.CreateBody(bodyDef); this.m_Body.CreateFixture(fixDef); m_spriteCircle = new My_Sprite(); this.Init(); } Circle.prototype.Init = function () { m_spriteCircle.constructor("images/circle.png", new Vector2D(80, 80), 1); m_spriteCircle.m_CurFrame = 0; } Circle.prototype.Draw = function (context) { m_spriteCircle.Draw(context); } and I draw it : var m_Circle = new Circle(); m_Circle.Draw(context);

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• Is the Observer pattern adequate for this kind of scenario?

  - by Omega

  I'm creating a simple game development framework with Ruby. There is a node system. A node is a game entity, and it has position. It can have children nodes (and one parent node). Children are always drawn relatively to their parent. Nodes have a @position field. Anyone can modify it. When such position is modified, the node must update its children accordingly to properly draw them relatively to it. @position contains a Point instance (a class with x and y properties, plus some other useful methods). I need to know when a node's @position's state changes, so I can tell the node to update its children. This is easy if the programmer does something like this: @node.position = Point.new(300,300) Because it is equivalent to calling this: # Code in the Node class def position=(newValue) @position = newValue update_my_children # <--- I know that the position changed end But, I'm lost when this happens: @node.position.x = 300 The only one that knows that the position changed is the Point instance stored in the @position property of the node. But I need the node to be notified! It was at this point that I considered the Observer pattern. Basically, Point is now observable. When a node's position property is given a new Point instance (through the assignment operator), it will stop observing the previous Point it had (if any), and start observing the new one. When a Point instance gets a state change, all observers (the node owning it) will be notified, so now my node can update its children when the position changes. A problem is when this happens: @someNode.position = @anotherNode.position This means that two nodes are observing the same point. If I change one of the node's position, the other would change as well. To fix this, when a position is assigned, I plan to create a new Point instance, copy the passed argument's x and y, and store my newly created point instead of storing the passed one. Another problem I fear is this: somePoint = @node.position somePoint.x = 500 This would, technically, modify @node's position. I'm not sure if anyone would be expecting that behavior. I'm under the impression that people see Point as some kind of primitive rather than an actual object. Is this approach even reasonable? Reasons I'm feeling skeptical: I've heard that the Observer pattern should be used with, well, many observers. Technically, in this scenario there is only one observer at a time. When assigning a node's position as another's (@someNode.position = @anotherNode.position), where I create a whole new instance rather than storing the passed point, it feels hackish, or even inefficient.

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• Want to make RTS strategy game, good starting point...?

  - by NOLANDI

  everybody! I find this community because I did research about game developing topics. So I decide to register on this community and ask for your opinion. I am not begineer in computer stuffs, and I know logic of programming language. I have little knowlegde of C, C++, Started to learn C#...but I was always oriented about other areas of IT. Amateur for game making but not in IT general! I am interested to make RTS strategy video game, isometric camera view (like PC GAME COMMANDOS for example)...so I started to read many books about DirectX, XNA, OpenGL, C#, AI programming...so I want to know where is good starting point for making this game genre. I want to use C# for this project, not C++, since I always had trouble with it, because it is too complicated. I see good oportunity for learning C#, since it has more object-oriented concept, with much less code and easy readible code for writing. Beside of that I know that C++ is the more powerful language until today. So I want to use DirectX and C# for my project. But it will required more time for sure, to learn it. I have trouble with finding books for c# & DirectX (I found just one), but in every next book, it is programming in c++! I read many web sites and they mentioned Slim DX, and in generaly, other articles which I read tells that it is possible to make good game with combination c# and directX, but...I don't have enough information about all this stuffs, so I became confused! It is really hard to have wish to learn c++ from scratch, since I started c# and I like it really...I don't try OpenGL, but I am already familiar with DirectX (some beginning stuffs), and I think that it is good and interesting. So, I decide to choose between maybe Unity3d and XNA first. XNA...hm, it sound that it is not bad solution, but I heard that it is already overcome technology, and I think that it is better to wait with XNA, until I try to make something with DirectX and C#, at first. But I dont know it is possible to make strategy game in XNA?! Maybe I am wrong. I also, find Unity 3D game engine and I find that I could programming there in C#, but many all examples are written in Javascript (Digital tutors videos)...But I generaly have wish to learn it too, because it allows to export games to mobile phones, there a lot of documentations, it is free, etc... I want to find best way to learn C# and DirectX, and make this game, but I dont know if it's possible to combine?! But maybe is good to first try Unity and XNA, because I am beginner?! Thank you all! I am willing to hear your expirience.

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• Is this a valid implementation of the repository pattern?

  - by user1578653

  I've been reading up about the repository pattern, with a view to implementing it in my own application. Almost all examples I've found on the internet use some kind of existing framework rather than showing how to implement it 'from scratch'. Here's my first thoughts of how I might implement it - I was wondering if anyone could advise me on whether this is correct? I have two tables, named CONTAINERS and BITS. Each CONTAINER can contain any number of BITs. I represent them as two classes: class Container{ private $bits; private $id; //...and a property for each column in the table... public function __construct(){ $this->bits = array(); } public function addBit($bit){ $this->bits[] = $bit; } //...getters and setters... } class Bit{ //some properties, methods etc... } Each class will have a property for each column in its respective table. I then have a couple of 'repositories' which handle things to do with saving/retrieving these objects from the database: //repository to control saving/retrieving Containers from the database class ContainerRepository{ //inject the bit repository for use later public function __construct($bitRepo){ $this->bitRepo = $bitRepo; } public function getById($id){ //talk directly to Oracle here to all column data into the object //get all the bits in the container $bits = $this->bitRepo->getByContainerId($id); foreach($bits as $bit){ $container->addBit($bit); } //return an instance of Container } public function persist($container){ //talk directly to Oracle here to save it to the database //if its ID is NULL, create a new container in database, otherwise update the existing one //use BitRepository to save each of the Bits inside the Container $bitRepo = $this->bitRepo; foreach($container->bits as $bit){ $bitRepo->persist($bit); } } } //repository to control saving/retrieving Bits from the database class BitRepository{ public function getById($id){} public function getByContainerId($containerId){} public function persist($bit){} } Therefore, the code I would use to get an instance of Container from the database would be: $bitRepo = new BitRepository(); $containerRepo = new ContainerRepository($bitRepo); $container = $containerRepo->getById($id); Or to create a new one and save to the database: $bitRepo = new BitRepository(); $containerRepo = new ContainerRepository($bitRepo); $container = new Container(); $container->setSomeProperty(1); $bit = new Bit(); $container->addBit($bit); $containerRepo->persist($container); Can someone advise me as to whether I have implemented this pattern correctly? Thanks!

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• Differences between a retail and wholesale website, and how difficult would it be to integrate them? [closed]

  - by kmy

  I was told to come here for some guidance, I know that my questions can be quite broad, but I just really want some kind of direction to go towards (links, articles, etc). So here it goes: For the past month I have been planning and started implementing a wholesale website, but plans got changed on me and I need to allow both retail and wholesale orders which will also depend on whether the account is a regular customer or also has a seller account. There are various types of products and it has been decided that I would use subcategories as tables to organize them and allow various specific item fields. So here are some of my specific questions: How different is the database structure for each item to be available for both wholesale and retail? Will it just be adding a quantity column and have two different pricing, or much more complicated? I am unaware if there's any price tables but would that be more difficult? They use Quickbooks POS software, how difficult/inefficient will it be to update inventory quantities if they have like 2000-4000 products? And what would be the best ways to extract the information and update the system? I know it export an excel spreadsheet so maybe a suggested php plugin for it? How difficult is this project in your professional opinion, and how big should a team usually be? (At the moment it is just me.) Projected time for planning, implementation, and quality assurance in accordance to team size? I am an entry level developer and I know that I do not have enough knowledge to direct myself on this website...What kind of web developer skills will I need to find to help me? (My company is willing to hire people to get this website done as fast as possible.) Also, what would be some great questionnaires to ask the product stakeholder about what he wants from the website? (He has made it clear he is neither computer or internet savvy...) Sorry for the amount of questions, I'm an entry level web developer and do not have a senior to look up to for guidance. I have knowledge in HTML, CSS, Javascript, jQuery, PHP, MySQL, phpMyAdmin. I have never used any frameworks like Zend, Magento, etc, and is doing this all from scratch. So far the website is built in an object oriented way, MVC architecture to the best of my abilities, but I have many doubts because I would really want to have this done right. If I have been unclear on some parts please tell me and I'll add more detail. I'm sure I'll have more additional questions later on, if anyone is open to that please tell me. Thanks in advance!

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• Including an embedded framework using a cross-project-reference: Header no such file or directory

  - by d11wtq

  I'm trying to create a Cocoa framework by using a cross-project reference in Xcode. I have 2 projects: one for the framework; one for the application that will use the framework. This framework is not intended to be stored within the system; it is an embedded framework that lives within the application bundle. I have successfully made the cross-project reference, marked the framework as being a dependency of my target, added a Copy Files build phase that puts the framework in Contents/Frameworks/ and added the framework to the linker phase (I checked the little "Target" checkbox; I've also done it manually by dragging the framework into the linker phase). My framework's install directory is correctly set to @executable_path/../Frameworks. However, when I try to build my app it: a) Correctly builds the framework first b) Correctly copies the framework c) Errors because it cannot find the master header file in my framework I have verified that the header is there. I can see it in the app product that is partially built. ls build/Debug/CioccolataTest.webapp/Contents/Frameworks/Cioccolata.framework/Headers/Cioccolata.h build/Debug/CioccolataTest.webapp/Contents/Frameworks/Cioccolata.framework/Headers/Cioccolata.h I have been able to successfully build the app by copying my framework into /Library/Frameworks (I can then delete it again after the successful build), but this is a workaround, I'm looking to find it out why Xcode doesn't find the framework's master header file without it being copied to a system directory. Is copying it to the app bundle during the build not sufficient? Here's the full build transcript if it's any help (it's just a Hello World app right now, so not much going on here): Build Cioccolata of project Cioccolata with configuration Debug SymLink /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/Current A cd /Users/chris/Projects/Mac/Cioccolata /bin/ln -sf A /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/Current SymLink /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Resources Versions/Current/Resources cd /Users/chris/Projects/Mac/Cioccolata /bin/ln -sf Versions/Current/Resources /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Resources SymLink /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Headers Versions/Current/Headers cd /Users/chris/Projects/Mac/Cioccolata /bin/ln -sf Versions/Current/Headers /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Headers SymLink /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Cioccolata Versions/Current/Cioccolata cd /Users/chris/Projects/Mac/Cioccolata /bin/ln -sf Versions/Current/Cioccolata /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Cioccolata ProcessInfoPlistFile /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Resources/Info.plist Info.plist cd /Users/chris/Projects/Mac/Cioccolata builtin-infoPlistUtility Info.plist -expandbuildsettings -platform macosx -o /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Resources/Info.plist CpHeader build/Debug/Cioccolata.framework/Versions/A/Headers/CWHelloWorld.h CWHelloWorld.h cd /Users/chris/Projects/Mac/Cioccolata /Developer/Library/PrivateFrameworks/DevToolsCore.framework/Resources/pbxcp -exclude .DS_Store -exclude CVS -exclude .svn -resolve-src-symlinks /Users/chris/Projects/Mac/Cioccolata/CWHelloWorld.h /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Headers CpHeader build/Debug/Cioccolata.framework/Versions/A/Headers/Cioccolata.h Cioccolata.h cd /Users/chris/Projects/Mac/Cioccolata /Developer/Library/PrivateFrameworks/DevToolsCore.framework/Resources/pbxcp -exclude .DS_Store -exclude CVS -exclude .svn -resolve-src-symlinks /Users/chris/Projects/Mac/Cioccolata/Cioccolata.h /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Headers CopyStringsFile /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Resources/English.lproj/InfoPlist.strings English.lproj/InfoPlist.strings cd /Users/chris/Projects/Mac/Cioccolata setenv ICONV /usr/bin/iconv /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copystrings --validate --inputencoding utf-8 --outputencoding UTF-16 English.lproj/InfoPlist.strings --outdir /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Resources/English.lproj ProcessPCH /var/folders/Xy/Xy-bvnxtFpiYBQPED0dK1++++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/Cioccolata_Prefix-dololiigmwjzkgenggebqtpvbauu/Cioccolata_Prefix.pch.gch Cioccolata_Prefix.pch normal i386 objective-c com.apple.compilers.gcc.4_2 cd /Users/chris/Projects/Mac/Cioccolata setenv LANG en_US.US-ASCII /Developer/usr/bin/gcc-4.2 -x objective-c-header -arch i386 -fmessage-length=0 -pipe -std=gnu99 -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -isysroot /Developer/SDKs/MacOSX10.5.sdk -mfix-and-continue -mmacosx-version-min=10.5 -gdwarf-2 -iquote /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-generated-files.hmap -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-own-target-headers.hmap -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-all-target-headers.hmap -iquote /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-project-headers.hmap -F/Users/chris/Projects/Mac/Cioccolata/build/Debug -I/Users/chris/Projects/Mac/Cioccolata/build/Debug/include -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/DerivedSources/i386 -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/DerivedSources -c /Users/chris/Projects/Mac/Cioccolata/Cioccolata_Prefix.pch -o /var/folders/Xy/Xy-bvnxtFpiYBQPED0dK1++++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/Cioccolata_Prefix-dololiigmwjzkgenggebqtpvbauu/Cioccolata_Prefix.pch.gch CompileC build/Cioccolata.build/Debug/Cioccolata.build/Objects-normal/i386/CWHelloWorld.o /Users/chris/Projects/Mac/Cioccolata/CWHelloWorld.m normal i386 objective-c com.apple.compilers.gcc.4_2 cd /Users/chris/Projects/Mac/Cioccolata setenv LANG en_US.US-ASCII /Developer/usr/bin/gcc-4.2 -x objective-c -arch i386 -fmessage-length=0 -pipe -std=gnu99 -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -isysroot /Developer/SDKs/MacOSX10.5.sdk -mfix-and-continue -mmacosx-version-min=10.5 -gdwarf-2 -iquote /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-generated-files.hmap -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-own-target-headers.hmap -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-all-target-headers.hmap -iquote /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Cioccolata-project-headers.hmap -F/Users/chris/Projects/Mac/Cioccolata/build/Debug -I/Users/chris/Projects/Mac/Cioccolata/build/Debug/include -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/DerivedSources/i386 -I/Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/DerivedSources -include /var/folders/Xy/Xy-bvnxtFpiYBQPED0dK1++++TI/-Caches-/com.apple.Xcode.501/SharedPrecompiledHeaders/Cioccolata_Prefix-dololiigmwjzkgenggebqtpvbauu/Cioccolata_Prefix.pch -c /Users/chris/Projects/Mac/Cioccolata/CWHelloWorld.m -o /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Objects-normal/i386/CWHelloWorld.o Ld /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Cioccolata normal i386 cd /Users/chris/Projects/Mac/Cioccolata setenv MACOSX_DEPLOYMENT_TARGET 10.5 /Developer/usr/bin/gcc-4.2 -arch i386 -dynamiclib -isysroot /Developer/SDKs/MacOSX10.5.sdk -L/Users/chris/Projects/Mac/Cioccolata/build/Debug -F/Users/chris/Projects/Mac/Cioccolata/build/Debug -filelist /Users/chris/Projects/Mac/Cioccolata/build/Cioccolata.build/Debug/Cioccolata.build/Objects-normal/i386/Cioccolata.LinkFileList -install_name @executable_path/../Frameworks/Cioccolata.framework/Versions/A/Cioccolata -mmacosx-version-min=10.5 -framework Foundation -single_module -compatibility_version 1 -current_version 1 -o /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework/Versions/A/Cioccolata Touch /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework cd /Users/chris/Projects/Mac/Cioccolata /usr/bin/touch -c /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework Build CioccolataTest of project CioccolataTest with configuration Debug ProcessInfoPlistFile /Users/chris/Projects/Mac/CioccolataTest/build/Debug/CioccolataTest.webapp/Contents/Info.plist Info.plist cd /Users/chris/Projects/Mac/CioccolataTest builtin-infoPlistUtility Info.plist -expandbuildsettings -platform macosx -o /Users/chris/Projects/Mac/CioccolataTest/build/Debug/CioccolataTest.webapp/Contents/Info.plist PBXCp build/Debug/CioccolataTest.webapp/Contents/Frameworks/Cioccolata.framework /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework cd /Users/chris/Projects/Mac/CioccolataTest /Developer/Library/PrivateFrameworks/DevToolsCore.framework/Resources/pbxcp -exclude .DS_Store -exclude CVS -exclude .svn -resolve-src-symlinks /Users/chris/Projects/Mac/Cioccolata/build/Debug/Cioccolata.framework /Users/chris/Projects/Mac/CioccolataTest/build/Debug/CioccolataTest.webapp/Contents/Frameworks CopyStringsFile /Users/chris/Projects/Mac/CioccolataTest/build/Debug/CioccolataTest.webapp/Contents/Resources/English.lproj/InfoPlist.strings English.lproj/InfoPlist.strings cd /Users/chris/Projects/Mac/CioccolataTest setenv ICONV /usr/bin/iconv /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copystrings --validate --inputencoding utf-8 --outputencoding UTF-16 English.lproj/InfoPlist.strings --outdir /Users/chris/Projects/Mac/CioccolataTest/build/Debug/CioccolataTest.webapp/Contents/Resources/English.lproj CompileC build/CioccolataTest.build/Debug/CioccolataTest.build/Objects-normal/i386/main.o main.m normal i386 objective-c com.apple.compilers.gcc.4_2 cd /Users/chris/Projects/Mac/CioccolataTest setenv LANG en_US.US-ASCII /Developer/usr/bin/gcc-4.2 -x objective-c -arch i386 -fmessage-length=0 -pipe -std=gnu99 -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -isysroot /Developer/SDKs/MacOSX10.5.sdk -mfix-and-continue -mmacosx-version-min=10.5 -gdwarf-2 -iquote /Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/CioccolataTest-generated-files.hmap -I/Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/CioccolataTest-own-target-headers.hmap -I/Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/CioccolataTest-all-target-headers.hmap -iquote /Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/CioccolataTest-project-headers.hmap -F/Users/chris/Projects/Mac/CioccolataTest/build/Debug -I/Users/chris/Projects/Mac/CioccolataTest/build/Debug/include -I/Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/DerivedSources/i386 -I/Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/DerivedSources -include /Users/chris/Projects/Mac/CioccolataTest/prefix.pch -c /Users/chris/Projects/Mac/CioccolataTest/main.m -o /Users/chris/Projects/Mac/CioccolataTest/build/CioccolataTest.build/Debug/CioccolataTest.build/Objects-normal/i386/main.o In file included from <command-line>:0: /Users/chris/Projects/Mac/CioccolataTest/prefix.pch:13:35: error: Cioccolata/Cioccolata.h: No such file or directory /Users/chris/Projects/Mac/CioccolataTest/main.m: In function 'main': /Users/chris/Projects/Mac/CioccolataTest/main.m:13: error: 'CWHelloWorld' undeclared (first use in this function) /Users/chris/Projects/Mac/CioccolataTest/main.m:13: error: (Each undeclared identifier is reported only once /Users/chris/Projects/Mac/CioccolataTest/main.m:13: error: for each function it appears in.) /Users/chris/Projects/Mac/CioccolataTest/main.m:13: error: 'hello' undeclared (first use in this function)

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• WPF animation: binding to the "To" attribute of storyboard animation.

  - by bozalina

  Hi, I'm trying to create a button that behaves similarly to the "slide" button on the iPhone. I have an animation that adjusts the position and width of the button, but I want these values to be based on the text used in the control. Currently, they're hardcoded. Here's my working XAML, so far: <CheckBox x:Class="Smt.Controls.SlideCheckBox" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:Smt.Controls" xmlns:System.Windows="clr-namespace:System.Windows;assembly=PresentationCore" Name="SliderCheckBox" mc:Ignorable="d"> <CheckBox.Resources> <System.Windows:Duration x:Key="AnimationTime">0:0:0.2</System.Windows:Duration> <Storyboard x:Key="OnChecking"> <DoubleAnimation Storyboard.TargetName="CheckButton" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(TranslateTransform.X)" Duration="{StaticResource AnimationTime}" To="40" /> <DoubleAnimation Storyboard.TargetName="CheckButton" Storyboard.TargetProperty="(Button.Width)" Duration="{StaticResource AnimationTime}" To="41" /> </Storyboard> <Storyboard x:Key="OnUnchecking"> <DoubleAnimation Storyboard.TargetName="CheckButton" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(TranslateTransform.X)" Duration="{StaticResource AnimationTime}" To="0" /> <DoubleAnimation Storyboard.TargetName="CheckButton" Storyboard.TargetProperty="(Button.Width)" Duration="{StaticResource AnimationTime}" To="40" /> </Storyboard> <Style x:Key="SlideCheckBoxStyle" TargetType="{x:Type local:SlideCheckBox}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:SlideCheckBox}"> <Canvas> <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" RecognizesAccessKey="True" VerticalAlignment="Center" HorizontalAlignment="Center" /> <Canvas> <!--Background--> <Rectangle Width="{Binding ElementName=ButtonText, Path=ActualWidth}" Height="{Binding ElementName=ButtonText, Path=ActualHeight}" Fill="LightBlue" /> </Canvas> <Canvas> <!--Button--> <Button Width="{Binding ElementName=CheckedText, Path=ActualWidth}" Height="{Binding ElementName=ButtonText, Path=ActualHeight}" Name="CheckButton" Command="{x:Static local:SlideCheckBox.SlideCheckBoxClicked}"> <Button.RenderTransform> <TransformGroup> <TranslateTransform /> </TransformGroup> </Button.RenderTransform> </Button> </Canvas> <Canvas> <!--Text--> <StackPanel Name="ButtonText" Orientation="Horizontal" IsHitTestVisible="False"> <Grid Name="CheckedText"> <Label Margin="7 0" Content="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:SlideCheckBox}}, Path=CheckedText}" /> </Grid> <Grid Name="UncheckedText" HorizontalAlignment="Right"> <Label Margin="7 0" Content="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:SlideCheckBox}}, Path=UncheckedText}" /> </Grid> </StackPanel> </Canvas> </Canvas> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Trigger.EnterActions> <BeginStoryboard Storyboard="{StaticResource OnChecking}" /> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard Storyboard="{StaticResource OnUnchecking}" /> </Trigger.ExitActions> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </CheckBox.Resources> <CheckBox.CommandBindings> <CommandBinding Command="{x:Static local:SlideCheckBox.SlideCheckBoxClicked}" Executed="OnSlideCheckBoxClicked" /> </CheckBox.CommandBindings> </CheckBox> And the code behind: using System.Windows; using System.Windows.Controls; using System.Windows.Input; namespace Smt.Controls { public partial class SlideCheckBox : CheckBox { public SlideCheckBox() { InitializeComponent(); Loaded += OnLoaded; } public static readonly DependencyProperty CheckedTextProperty = DependencyProperty.Register("CheckedText", typeof(string), typeof(SlideCheckBox), new PropertyMetadata("Checked Text")); public string CheckedText { get { return (string)GetValue(CheckedTextProperty); } set { SetValue(CheckedTextProperty, value); } } public static readonly DependencyProperty UncheckedTextProperty = DependencyProperty.Register("UncheckedText", typeof(string), typeof(SlideCheckBox), new PropertyMetadata("Unchecked Text")); public string UncheckedText { get { return (string)GetValue(UncheckedTextProperty); } set { SetValue(UncheckedTextProperty, value); } } public static readonly RoutedCommand SlideCheckBoxClicked = new RoutedCommand(); void OnLoaded(object sender, RoutedEventArgs e) { Style style = TryFindResource("SlideCheckBoxStyle") as Style; if (!ReferenceEquals(style, null)) { Style = style; } } void OnSlideCheckBoxClicked(object sender, ExecutedRoutedEventArgs e) { IsChecked = !IsChecked; } } } The problem comes when I try to bind the "To" attribute in the DoubleAnimations to the actual width of the text, the same as I'm doing in the ControlTemplate. If I bind the values to an ActualWidth of an element in the ControlTemplate, the control comes up as a blank checkbox (my base class). However, I'm binding to the same ActualWidths in the ControlTemplate itself without any problems. Just seems to be the CheckBox.Resources that have a problem with it. For instance, the following will break it: <DoubleAnimation Storyboard.TargetName="CheckButton" Storyboard.TargetProperty="(Button.Width)" Duration="{StaticResource AnimationTime}" To="{Binding ElementName=CheckedText, Path=ActualWidth}" /> I don't know whether this is because it's trying to bind to a value that doesn't exist until a render pass is done, or if it's something else. Anyone have any experience with this sort of animation binding?

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• Android Remote Service Keeps Restarting

  - by user244190

  Ok so I've built an app that uses a remote service to do some real time GPS tracking. I am using the below code to start and bind to the service. The remote service uses aidl, sets up a notification icon, runs the GPS and locationListener. In onLocationChanged, a handler sends data back to the caller via the callback. Pretty much straight out of the examples and resources online. I want to allow the service to continue running even if the app closes. When the app is restarted, I want the app to again bind to the service (using the existing service if running) and again receive data from the tracker. I currently have the app mode set to singleTask and cannot use singleinstance due to another issue. My problem is that quit often even after the app and service are shut down either from the app itself, or from AdvancedTaskKiller, or a Forceclose, the service will restart and initialize the GPS. touching on the notification will open the app. I again stop the tracking which removes the notification and turns off the GPS Close the app, and again after a few seconds the service restarts. The only way to stop it is to power off the phone. What can I do to stop this from happening. Does it have to do with the mode of operation? START_NOT_STICKY or START_REDELIVER_INTENT? Or do I need to use stopSelf()? My understanding is that if the service is not running when I use bindService() that the service will be created...so do I really need to use start/stopService also? I thought I would need to use it if I want the service to run even after the app is closed. That is why i do not unbind/stop the service in onDestroy(). Is this correct? I've not seen any other info an this, so I,m not sure where to look. Please Help! Thanks Patrick //Remote Service Startup try{ startService(); }catch (Exception e) { Toast.makeText(ctx, e.getMessage().toString(), Toast.LENGTH_SHORT).show(); } } try{ bindService(); }catch (Exception e) { Toast.makeText(ctx, e.getMessage().toString(), Toast.LENGTH_SHORT).show(); } //Remote service shutdown try { unbindService(); }catch(Exception e) { Toast.makeText(ctx, e.getMessage().toString(), Toast.LENGTH_SHORT).show(); } try{ stopService(); }catch(Exception e) { Toast.makeText(ctx, e.getMessage().toString(), Toast.LENGTH_SHORT).show(); } private void startService() { if( myAdapter.trackServiceStarted() ) { if(SETTING_DEBUG_MODE) Toast.makeText(this, "Service already started", Toast.LENGTH_SHORT).show(); started = true; if(!myAdapter.trackDataExists()) insertTrackData(); updateServiceStatus(); } else { startService( new Intent ( "com.codebase.TRACKING_SERVICE" ) ); Log.d( "startService()", "startService()" ); started = true; updateServiceStatus(); } } private void stopService() { stopService( new Intent ( "com.codebase.TRACKING_SERVICE" ) ); Log.d( "stopService()", "stopService()" ); started = false; updateServiceStatus(); } private void bindService() { bindService(new Intent(ITrackingService.class.getName()), mConnection, Context.BIND_AUTO_CREATE); bindService(new Intent(ITrackingSecondary.class.getName()), mTrackingSecondaryConnection, Context.BIND_AUTO_CREATE); started = true; } private void unbindService() { try { mTrackingService.unregisterCallback(mCallback); } catch (RemoteException e) { // There is nothing special we need to do if the service // has crashed. e.getMessage(); } try { unbindService(mTrackingSecondaryConnection); unbindService(mConnection); } catch (Exception e) { // There is nothing special we need to do if the service // has crashed. e.getMessage(); } started = false; } private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { // This is called when the connection with the service has been // established, giving us the service object we can use to // interact with the service. We are communicating with our // service through an IDL interface, so get a client-side // representation of that from the raw service object. mTrackingService = ITrackingService.Stub.asInterface(service); // We want to monitor the service for as long as we are // connected to it. try { mTrackingService.registerCallback(mCallback); } catch (RemoteException e) { // In this case the service has crashed before we could even // do anything with it; we can count on soon being // disconnected (and then reconnected if it can be restarted) // so there is no need to do anything here. } } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been // unexpectedly disconnected -- that is, its process crashed. mTrackingService = null; } }; private ServiceConnection mTrackingSecondaryConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { // Connecting to a secondary interface is the same as any // other interface. mTrackingSecondaryService = ITrackingSecondary.Stub.asInterface(service); try{ mTrackingSecondaryService.setTimePrecision(SETTING_TIME_PRECISION); mTrackingSecondaryService.setDistancePrecision(SETTING_DISTANCE_PRECISION); } catch (RemoteException e) { // In this case the service has crashed before we could even // do anything with it; we can count on soon being // disconnected (and then reconnected if it can be restarted) // so there is no need to do anything here. } } public void onServiceDisconnected(ComponentName className) { mTrackingSecondaryService = null; } }; //TrackService onDestry() public void onDestroy() { try{ if(lm != null) { lm.removeUpdates(this); } if(mNotificationManager != null) { mNotificationManager.cancel(R.string.local_service_started); } Toast.makeText(this, "Service stopped", Toast.LENGTH_SHORT).show(); }catch (Exception e){ Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show(); } // Unregister all callbacks. mCallbacks.kill(); // Remove the next pending message to increment the counter, stopping // the increment loop. mHandler.removeMessages(REPORT_MSG); super.onDestroy(); } ServiceConnectionLeaked: I'm seeing a lot of these: 04-21 09:25:23.347: ERROR/ActivityThread(3246): Activity com.codebase.GPSTest has leaked ServiceConnection com.codebase.GPSTest$6@4482d428 that was originally bound here 04-21 09:25:23.347: ERROR/ActivityThread(3246): android.app.ServiceConnectionLeaked: Activity com.codebase.GPSTest has leaked ServiceConnection com.codebase.GPSTest$6@4482d428 that was originally bound here 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread$PackageInfo$ServiceDispatcher.<init>(ActivityThread.java:977) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread$PackageInfo.getServiceDispatcher(ActivityThread.java:872) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ApplicationContext.bindService(ApplicationContext.java:796) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.content.ContextWrapper.bindService(ContextWrapper.java:337) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at com.codebase.GPSTest.bindService(GPSTest.java:2206) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at com.codebase.GPSTest.onStartStopClick(GPSTest.java:1589) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at com.codebase.GPSTest.onResume(GPSTest.java:1210) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1149) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.Activity.performResume(Activity.java:3763) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2937) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2965) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2516) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3625) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.access$2300(ActivityThread.java:119) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1867) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.os.Handler.dispatchMessage(Handler.java:99) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.os.Looper.loop(Looper.java:123) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at android.app.ActivityThread.main(ActivityThread.java:4363) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at java.lang.reflect.Method.invokeNative(Native Method) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at java.lang.reflect.Method.invoke(Method.java:521) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 04-21 09:25:23.347: ERROR/ActivityThread(3246): at dalvik.system.NativeStart.main(Native Method) And These: Is this ok, or do I need to make sure i deactivate/close 04-21 09:58:55.487: INFO/dalvikvm(3440): Uncaught exception thrown by finalizer (will be discarded): 04-21 09:58:55.487: INFO/dalvikvm(3440): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@447ef258 on gps_data that has not been deactivated or closed 04-21 09:58:55.487: INFO/dalvikvm(3440): at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596) 04-21 09:58:55.487: INFO/dalvikvm(3440): at dalvik.system.NativeStart.run(Native Method)

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