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• Wordpress 403/404 Errors: You don't have permission to access /wp-admin/themes.php on this server

  - by Glen

  Some background: I setup six blogs this week, all using Wordpress 2.92, installed with Fantastico on a baby croc plan with Hostgator. I used the same theme (heatmap 2.5.4) and plugins for each blog. They were all up and running, no issues at all. I go to create a new blog this morning, using the same setup, and when I try to change the theme settings, I get the following error: Forbidden You don't have permission to access /wp-admin/themes.php on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.8n DAV/2 mod_fcgid/2.3.5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at http://www.mydomain.com Port 80 I tried uninstalling WP and doing a clean install, still the same issue with a clean installation. So I went back and checked the six other blogs that I had setup over the last week or so, and they are also now giving me 403 or 404 errors when trying to change theme settings, and everytime there's an error it points to either themes.php or functions.php At this point I'm at my wits end trying to figure out what the problem is. Hostgator support looked at it and thought maybe it was a permissions issue but they reset those and I'm still having the problem. At first I thought the problem might have been related to a plugin I recently installed on the previous six blogs that morning (ByREV Fix Missed Shedule Plugin) to deal with a missed schedule bug with WP 2.92, and that maybe that had mucked things up. But then I checked a blog I built months ago, also using the same theme and plugins, and now it too is also encountering the same problem. Any ideas? I tried deleting my htaccess, uploading a blank one, uploading one with this snippet I found on the hostgator forum: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress Nothing has worked. I still get 403 or 404 errors everytime. Everything was working perfectly yesterday so I know this setup DOES WORK, I've just mucked something up somewhere and I'm clueless what it is. I read a related thread here and tried chmoding the wp-content folder to 0755 and still having the issue. Any thoughts? Thanks!

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• Toolbar items in sub-nib

  - by roe

  This question has probably been asked before, but my google-fu must be inferior to everybody else's, cause I can't figure this out. I'm playing around with the iPhone SDK, and I'm building a concept app I've been thinking about. If we have a look at the skeleton generated with a navigation based app, the MainWindow.xib contains a navigation controller, and within that a root-view controller (and a navigation bar and toolbar if you play around with it a little). The root-view controller has the RootViewController-nib associated with it, which loads the table-view. So far so good. To add content to the tool bar and to the navigation bar, I'm supposed to add those to in the hierarchy below the Root View Controller (which works, no problem). However, what I can't figure out is, this is all still within the MainWindow.xib (or, at runtime, nib). How would I define a xib in order for it to pick up tool bar items from that? I want to do (the equivalent of, just reusing the name here) RootViewController *controller = [[RootViewController alloc] initWithNibName:nil bundle:nil]; [self.navigationController pushViewController:controller animated:YES]; [controller release]; and have the navigation controller pick-up on the tool bar items defined in that nib. The logical place to put it would be in the hierarchy under File's Owner (which is of type RootViewController), but it doesn't appear to be possible. Currently, I'm assigning these (navigationItem and toolbarItems) manually in the viewDidLoad method, or define them in the MainWindow.xib directly to be loaded when the app initializes. Any ideas? Edit I guess I'll try to explain with a picture. This is the Interface Builder of the main window, pretty much as it comes out of the wizard to create a navigation based project. I've added a toolbar item for clarity though. You can see the navigation controller, with a toolbar and a navigation bar, and the root view controller. Basically, the Root View Controller has a bar button item and a navigation item as you can see. The thing is, it's also got a nib associated with it, which, when loaded will instantiate a view, and assign it to the view outlet of the controller (which in that nib is File's Owner, of type RootViewController, as should be). How can I get the toolbar item, and the navigation item, into the other nib, the RootViewController.nib so I can remove them here. The RootViewController.nib adds everything else to the Root View Controller, why not these items? The background for this is that I want to simply instantiate RootViewController, initialize it with its own nib (i.e. initWithNibName:nil shown above), and push it onto the navigation controller, without having to add the navigation/toolbar items in coding (as I do it now).

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• Window out of the screen when maximized using WPF shell integration library

  - by Eduardo Molteni

  I'm using the WPF Shell Integration Library to create a custom chrome of my wpf app. All is good, but when maximizing the app, 6 or 7 pixels are out of the screen. This is the code I'm using: <Style TargetType="{x:Type local:MainWindow}"> <Setter Property="shell:WindowChrome.WindowChrome"> <Setter.Value> <shell:WindowChrome ResizeBorderThickness="6" CaptionHeight="10" CornerRadius="0" GlassFrameThickness="1"/> </Setter.Value> </Setter> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:MainWindow}"> <Grid> <Border BorderThickness="1" BorderBrush="#389FD1" Background="#389FD1"> <ContentPresenter Margin="0,22,0,0" Content="{TemplateBinding Content}"/> </Border> <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Top" > <TextBlock Text="{Binding NombreUsuario}" Foreground="White" Margin="5,5,20,5" Opacity=".8" /> <Button Style="{StaticResource ImageButton}" Height="20" Width="20" Margin="0" Click="WindowMinimize" shell:WindowChrome.IsHitTestVisibleInChrome="True"> <Image Height="10" Width="10" Source="/Resources/Images/minimize.png" /> </Button> <Button Style="{StaticResource ImageButton}" Height="20" Width="20" Margin="0" Click="WindowMaximizeRestore" shell:WindowChrome.IsHitTestVisibleInChrome="True" > <Image Height="10" Width="10" Source="/Resources/Images/maximize.png" /> </Button> <Button Style="{StaticResource ImageButton}" Height="20" Width="20" Margin="0" Click="WindowClose" shell:WindowChrome.IsHitTestVisibleInChrome="True"> <Image Height="10" Width="10" Source="/Resources/Images/close.png" /> </Button> </StackPanel> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style>

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• Android AsyncTask context problem, help!

  - by dnkoutso

  I've been working with AsyncTasks in Android and I am dealing with a strange issue. Take a simple example, an Activity with one AsyncTask. The task on the background does not do anything spectacular, it just sleeps for 8 seconds. At the end of the AsyncTask in the onPostExecute() method I am just setting a button visibility status to View.VISIBLE, only to verify my results. Now, this works great until the user decides to change his phones orientation while the AsyncTask is working (within the 8 second sleep window). I understand the Android activity life cycle and I know the activity gets destroyed and recreated. This is where the problem comes in. The AsyncTask is referring to a button and apparently holds a reference to the context that started the AsyncTask in the first place. I would expect, that this old context (since the user caused an orientation change) to either become null and the AsyncTask to throw an NPE for the reference to the button it is trying to make visible. Instead, no NPE is thrown, the asynctask thinks that the button reference is not null, sets it to visible. The result? Nothing is happening on the screen! I have tackled this by keeping and updating the context reference into the AsyncTask. This is cumbersome and prone to leaks. Here's the code: public class Main extends Activity { private Button mButton = null; private Button mTestButton = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mButton = (Button) findViewById(R.id.btnStart); mButton.setOnClickListener(new OnClickListener () { @Override public void onClick(View v) { new taskDoSomething().execute(0l); } }); mTestButton = (Button) findViewById(R.id.btnTest); } private class taskDoSomething extends AsyncTask<Long, Integer, Integer> { @Override protected Integer doInBackground(Long... params) { Log.i("LOGGER", "Starting..."); try { Thread.sleep(8000); } catch (InterruptedException e) { e.printStackTrace(); } return 0; } @Override protected void onPostExecute(Integer result) { Log.i("LOGGER", "...Done"); mTestButton.setVisibility(View.VISIBLE); } } } Try executing and while the AsyncTask is working change your phones orientation.

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• How to parametrize WPF Style?

  - by Konstantin

  Hi! I'm looking for a simplest way to remove duplication in my WPF code. Code below is a simple traffic light with 3 lights - Red, Amber, Green. It is bound to a ViewModel that has one enum property State taking one of those 3 values. Code declaring 3 ellipses is very duplicative. Now I want to add animation so that each light fades in and out - styles will become even bigger and duplication will worsen. Is it possible to parametrize style with State and Color arguments so that I can have a single style in resources describing behavior of a light and then use it 3 times - for 'Red', 'Amber' and 'Green' lights? <UserControl.Resources> <l:TrafficLightViewModel x:Key="ViewModel" /> </UserControl.Resources> <StackPanel Orientation="Vertical" DataContext="{StaticResource ViewModel}"> <StackPanel.Resources> <Style x:Key="singleLightStyle" TargetType="{x:Type Ellipse}"> <Setter Property="StrokeThickness" Value="2" /> <Setter Property="Stroke" Value="Black" /> <Setter Property="Height" Value="{Binding Width, RelativeSource={RelativeSource Self}}" /> <Setter Property="Width" Value="60" /> <Setter Property="Fill" Value="LightGray" /> </Style> </StackPanel.Resources> <Ellipse> <Ellipse.Style> <Style TargetType="{x:Type Ellipse}" BasedOn="{StaticResource singleLightStyle}"> <Style.Triggers> <DataTrigger Binding="{Binding State}" Value="Red"> <Setter Property="Fill" Value="Red" /> </DataTrigger> </Style.Triggers> </Style> </Ellipse.Style> </Ellipse> <Ellipse> <Ellipse.Style> <Style TargetType="{x:Type Ellipse}" BasedOn="{StaticResource singleLightStyle}"> <Style.Triggers> <DataTrigger Binding="{Binding State}" Value="Amber"> <Setter Property="Fill" Value="Red" /> </DataTrigger> </Style.Triggers> </Style> </Ellipse.Style> </Ellipse> <Ellipse> <Ellipse.Style> <Style TargetType="{x:Type Ellipse}" BasedOn="{StaticResource singleLightStyle}"> <Style.Triggers> <DataTrigger Binding="{Binding State}" Value="Green"> <Setter Property="Fill" Value="Green" /> </DataTrigger> </Style.Triggers> </Style> </Ellipse.Style> </Ellipse> </StackPanel>

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• Layout does not show up after Activity launch

  - by Peter

  I have an activity which invokes an onItemClick and launches another activity. This activity has a static layout(for testing purposes), but only thing I see is black(I even set the text color to white to check it out). My listener list.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) { //create new intent Intent item = new Intent(getApplicationContext(), Item.class); // Close all views before launching logged //item.putExtra("name", ((TextView)arg1).getText()); //item.putExtra("uid", user_id); item.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(item); // Close Login Screen onPause(); } }); My activity is here(not much to do it just launches the layout) public class Item extends Activity{ protected SQLiteDatabase myDB=null; protected String name; protected int uid; TextView yeart,year,itemname,comment,commentt,value,valuet,curr,currt; protected void onStart(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.herp); /*name=getIntent().getStringExtra("name"); uid=Integer.parseInt(getIntent().getStringExtra("uid")); itemname=(TextView) findViewById(R.id.itemName);//itemname.setText(name); year=(TextView) findViewById(R.id.itemYear); yeart=(TextView) findViewById(R.id.year); comment=(TextView) findViewById(R.id.itemComments); commentt=(TextView) findViewById(R.id.comments); curr=(TextView) findViewById(R.id.itemcurrent); currt=(TextView) findViewById(R.id.current); value=(TextView) findViewById(R.id.itemValue); valuet=(TextView) findViewById(R.id.value);*/ Database openHelper = new Database(this); myDB = openHelper.getReadableDatabase(); myDB=SQLiteDatabase.openDatabase("data/data/com.example.login2/databases/aeglea", null, SQLiteDatabase.OPEN_READONLY); }} And finally my XML layout <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/itemName" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" android:gravity="center" android:layout_marginBottom="10px" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="#fff" /> <TextView android:id="@+id/current" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Current" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemcurrent" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" /> <TextView android:id="@+id/year" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Year" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemYear" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="asdasd" /> <TextView android:id="@+id/value" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Value" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemValue" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="TextView" /> <TextView android:id="@+id/comments" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Comments" android:textSize="20dp" android:textStyle="bold" /> <TextView android:id="@+id/itemComments" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="TextView" /> </LinearLayout>

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• Running a Java daemon with a GWT front-end served by embedded Jetty

  - by BinaryMuse

  Greetings, coders, Background Info and Code I am trying to create a daemon-type program (e.g., it runs constantly, polling for things to do) that is managed by a GWT application (servlets in a WAR) which is in turn served by an embedded Jetty server (using a WebAppContext). I'm having problems making the GWT application aware of the daemon object. For testing things, I currently have two projects: The daemon and embedded Jetty server in one (EmbJetTest), and the GWT application in another (DefaultApp). This is the current state of the code: First, EmbJetTest creates an embedded Jetty server like so, using a ServletContextListener to inject the daemon object into the web application context: EmbJetTest.server = new Server(8080); // Create and start the daemon Daemon daemon = new Daemon(); Thread thread = new Thread(daemon); thread.start(); // war handler WebAppContext waContext = new WebAppContext(); waContext.setContextPath("/webapp"); waContext.setWar("./apps/DefaultApp.war"); waContext.addEventListener(new DaemonLoader(daemon)); // Add it to the server EmbJetTest.server.setHandler(waContext); EmbJetTest.server.setThreadPool(new QueuedThreadPool(10)); // Start the server; join() blocks until we shut down EmbJetTest.server.start(); EmbJetTest.server.join(); // Stop the daemon thread daemon.stopLoop(); Daemon is a very simple object with a couple properties, at the moment. DaemonLoader is the following ServletContextListener implementation: private Daemon daemon; public DaemonLoader(Daemon daemon) { this.daemon = daemon; } @Override public void contextDestroyed(ServletContextEvent arg0) { } @Override public void contextInitialized(ServletContextEvent arg0) { arg0.getServletContext().setAttribute("daemon", this.daemon); } Then, in one of my servlets in the GWT application, I have the following code: Daemon daemon = (Daemon) this.getServletContext().getAttribute("daemon"); However, when I visit localhost:8080/webapp/* and invoke the servlet, this code throws a ClassCastException, even though the classes are of the same type. This StackOverflow answer indicates that this is because the two classes are loaded with different classloaders. Question My question is twofold. Am I even on the right track here? Am I going about this completely the wrong way? Something tells me I am, but I can't think of another way to make the daemon available to both applications. Is there a better way to communicate with the daemon from the GWT application? Should the GWT app own the daemon and somehow start the daemon itself? The daemon needs to run even if no one visits the one of the GWT app's servlets--how could I do this? If I am on the right track, how can I get around the classloader issue? Thanks in advance.

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• Java language features which have no equivalent in C#

  - by jthg

  Having mostly worked with C#, I tend to think in terms of C# features which aren't available in Java. After working extensively with Java over the last year, I've started to discover Java features that I wish were in C#. Below is a list of the ones that I'm aware of. Can anyone think of other Java language features which a person with a C# background may not realize exists? The articles http://www.25hoursaday.com/CsharpVsJava.html and http://en.wikipedia.org/wiki/Comparison_of_Java_and_C_Sharp give a very extensive list of differences between Java and C#, but I wonder whether I missed anything in the (very) long articles. I can also think of one feature (covariant return type) which I didn't see mentioned in either article. Please limit answers to language or core library features which can't be effectively implemented by your own custom code or third party libraries. Covariant return type - a method can be overridden by a method which returns a more specific type. Useful when implementing an interface or extending a class and you want a method to override a base method, but return a type more specific to your class. Enums are classes - an enum is a full class in java, rather than a wrapper around a primitive like in .Net. Java allows you to define fields and methods on an enum. Anonymous inner classes - define an anonymous class which implements a method. Although most of the use cases for this in Java are covered by delegates in .Net, there are some cases in which you really need to pass multiple callbacks as a group. It would be nice to have the choice of using an anonymous inner class. Checked exceptions - I can see how this is useful in the context of common designs used with Java applications, but my experience with .Net has put me in a habit of using exceptions only for unrecoverable conditions. I.E. exceptions indicate a bug in the application and are only caught for the purpose of logging. I haven't quite come around to the idea of using exceptions for normal program flow. strictfp - Ensures strict floating point arithmetic. I'm not sure what kind of applications would find this useful. fields in interfaces - It's possible to declare fields in interfaces. I've never used this. static imports - Allows one to use the static methods of a class without qualifying it with the class name. I just realized today that this feature exists. It sounds like a nice convenience.

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• How to get rid of annoying HorizontalContentAlignment binding warning?

  - by marco.ragogna

  I am working on a large WPF project and during debug my output window is filled with these annoying warnings: System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=HorizontalContentAlignment; DataItem=null; target element is 'ComboBoxItem' (Name=''); target property is 'HorizontalContentAlignment' (type ' HorizontalAlignment') In the specific example ComboBoxItem is styled in this way: <Style x:Key="{x:Type ComboBoxItem}" TargetType="{x:Type ComboBoxItem}"> <Setter Property="OverridesDefaultStyle" Value="True"/> <Setter Property="SnapsToDevicePixels" Value="True"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ComboBoxItem}"> <Border Name="bd" Padding="4,4,4,4" SnapsToDevicePixels="True" CornerRadius="2,2,2,2"> <ContentPresenter /> </Border> <ControlTemplate.Triggers> <Trigger Property="IsHighlighted" Value="true"> <Setter TargetName="bd" Property="Background" Value="{StaticResource MediumBrush}"/> <Setter TargetName="bd" Property="Padding" Value="4,4,4,4"/> <Setter TargetName="bd" Property="CornerRadius" Value="2,2,2,2"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> I know that the problem is generated by the default theme definition for ComboBoxItem that contains things like: <Setter Property="Control.HorizontalContentAlignment"> <Setter.Value> <Binding Path="HorizontalContentAlignment" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ItemsControl, AncestorLevel=1}" /> </Setter.Value> </Setter> but I also thought that using <Setter Property="OverridesDefaultStyle" Value="True"/> would taken care of the problem, and instead warnings are still there. Any help is really appreciated

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• Design question for WinForms (C#) app, using Entity Framework

  - by cdotlister

  I am planning on writing a small home budget application for myself, as a learning excercise. I have built my database (SQL Server), and written a small console application to interact with it, and test out scenarios on my database. Once I am happy, my next step would be to start building the application - but I am already wondering what the best/standard design would be. I am palnning on using Entity Framework for handling my database entities... then linq to sql/objects for getting the data, all running under a WinForms (for now) application. My plan (I've never used EF... and most of my development background is Web apps) is to have my database... with Entity Framework in it's own project.. which has the connection to the database. This project would expose methods such as 'GetAccount()', 'GetAccount(int accountId)' etc. I'd then have a service project that references my EF project. And on top of that, my GUI project, which makes the calls to my service project. But I am stuck. Lets say I have a screen that displays a list of Account types (Debit, Credit, Loan...). Once I have selected one, the next drop down shows a list of accounts I have that suite that account type. So, my OnChange event on my DropDown on the account type control will make a call to the serviceLayer project, 'GetAccountTypes()', and I would expect back a List< of Account Types. However, the AccountType object ... what is that? That can't be the AccountType object from my EF project, as my GUI project doesn't have reference to it. Would I have to have some sort of Shared Library, shared between my GUI and my Service project, with a custom built AccountType object? The GUI can then expect back a list of these. So my service layer would have a method: public List<AccountType> GetAccountTypes() That would then make a call to a custom method in my EF project, which would probably be the same as the above method, except, it returns an list of EF.Data.AccountType (The Entity Framework generated Account Type object). The method would then have the linq code to get the data as I want it. Then my service layer will get that object, and transform it unto my custom AccountType object, and return it to the GUI. Does that sound at all like a good plan?

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• Make Bluetooth on Android 2.1 discoverable indefinitely

  - by kanov-baekonfat

  Hello all. I'm working on a research project which involves Bluetooth and the Android OS. I need to make Bluetooth discoverable indefinitely in order for the project to continue. The Problem: Android limits discoverability to 300 seconds. I cannot ask the user every 300 seconds to turn discoverability back on as my application is designed to run in the background without disturbing the user. As far as I am aware, there is no way to increase the time though Android's GUI. Some sources have called this a safety feature, others have called this a bug. There may be a bit of truth in both... What I'm Trying / Have Tried: I'm trying to edit a stable release of cyanogenmod to turn the discoverability timer off (it's possible; there's a configuration file that needs to have a single number changed). This isn't working because I'm having verification problems with the resulting package. During the past week, I downloaded the cyanogenmod source code, changed a relevant class in the hope that it would make Bluetooth discoverable indefinitely, and tried to recompile. This did not work because (a) the repo is frequently changed, leading to an unstable code base which fails to compile (OR, it could be that I'm using it incorrectly; just because it looked like it was the code's fault in many instances doesn't mean I should blame it for all the problems I encountered!) and (b) the repo decides to periodically "ignore" me (but not always, as I have gotten the code base before!), replying to my synchronization/connection attempts with: fatal: The remote end hung up unexpectedly As you might imagine, the above two issues are problematic and very frustrating to deal with. More Info: I'm running Android 2.1 via cyanogenmod (v5 I believe). This means the phone is also rooted. I have a developer phone, which means that the bootloader is unlocked. My phone is an HTC Magic (32B). The Big Question: How can I make Bluetooth indefinitely discoverable on Android? Thanks for your time and input. I feel like I'm spinning my tires on this issue and I'd like to move past it.

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• Plane projection and scale causing bluring in silverlight

  - by Andy

  Ok, So I've tried to make an application which relies on images being scaled by an individual factor. These images are then able to be turned over, but the use of an animation working on the ProjectionPlane rotation. The problem comes around when an image is both scaled and rotated. For some reason it starts bluring, where a non scaled image doesn't blur. Also, if you look at the example image below (top is scaled and rotated, bottom is rotated) the projection of the top one doesn't even seem right. Its too horizontal. This this the code for the test app: <UserControl x:Class="SilverlightApplication1.Page" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="400" Height="300"> <Canvas x:Name="LayoutRoot" Background="White"> <Border Canvas.Top="25" Canvas.Left="50"> <Border.RenderTransform> <TransformGroup> <ScaleTransform ScaleX="3" ScaleY="3" /> </TransformGroup> </Border.RenderTransform> <Border.Projection> <PlaneProjection RotationY="45"/> </Border.Projection> <Image Source="bw-test-pattern.jpg" Width="50" Height="40"/> </Border> <Border Canvas.Top="150" Canvas.Left="50"> <Border.RenderTransform> <TransformGroup> <ScaleTransform ScaleX="1" ScaleY="1" /> </TransformGroup> </Border.RenderTransform> <Border.Projection> <PlaneProjection RotationY="45"/> </Border.Projection> <Image Source="bw-test-pattern.jpg" Width="150" Height="120"/> </Border> </Canvas> </UserControl> So if anyone could possible shed any light on why this may be happening, I'd very much appreciate it. Suggestions also welcome! :)

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• Playing dynamically embedded sound object via Javascript

  - by Vikram Goyal

  I need to background load some WAV files for an HTML page using AJAX. I use AJAX to get the details of the WAV files, then use the embed tag, and I can confirm that the files have loaded successfully because when I set autostart to true, the files play. However, I need the files to play only when the user clicks on a button (or an event is fired). The following is my code to preload these files: function preloadMedia() { for(var i = 0; i < testQuestions.length; i++) { var soundEmbed = document.createElement("embed"); soundEmbed.setAttribute("src", "/media/sounds/" + testQuestions[i].mediaFile); soundEmbed.setAttribute("hidden", true); soundEmbed.setAttribute("id", testQuestions[i].id); soundEmbed.setAttribute("autostart", false); soundEmbed.setAttribute("width", 0); soundEmbed.setAttribute("height", 0); soundEmbed.setAttribute("enablejavascript", true); document.body.appendChild((soundEmbed)); } } I use the following code to play the file (based on what sound file that user wants to play) function soundPlay(which) { var sounder = document.getElementById(which); sounder.Play(); } Something is wrong here, as none of the browsers I have tested on play the files using the code above. There are no errors, and the code just returns. I would have left it at that (that is - I would have convinced the client to convert all WAV's to MP3 and use MooTools). But I realized that I could play the sound files, which were not dynamically embeded. Thus, the same soundPlay function would work for a file embeded in the following manner: <embed src="/media/sounds/hug_sw1.wav" id="sound2" width="0" heigh="0" autostart="false" enablejavascript="true"/> anywhere within the HTML. And it plays well in all the browsers. Anyone have a clue on this? Is this some sort of undocumented security restriction in all the browsers? (Please remember that the files do get preloaded dynamically, as I can confirm by setting the autostart property to true - They all play). Any help appreciated.

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• Can't interact with children of an itemRenderer in Flex 4 Gumbo

  - by BlueDude

  I thought this would be pretty easy but I'm running into all sorts of problems with this. I have an ItemRenderer with a an image and two labels. I want to assign separate mouse events to the image and two labels. It seems like the item renderer is treated like a single interactive piece and I haven't found a way to override that. I couldn't even disable the default rollover effect so I had to style the rollOverColor to match my background. Can anyone provide a solution? <s:DataGroup id="browserDataGroup" dataProvider="{model.userBoardList}" verticalCenter="0" left="10" rollOverColor="0x424242" itemRenderer="edu.xxxxx.components.board.BrowserItemRenderer"> <!--itemrenderer code below --> <s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" xmlns:ns="library://ns.adobe.com/flex/mx" buttonMode="true" useHandCursor="true" mouseChildren="true"> <s:states> <s:State name="up"/> <s:State name="over"/> </s:states> <s:layout> <s:VerticalLayout gap="2"/> </s:layout> <s:Group> <ns:Image id="image" source="{data.thumbnail}" addedEffect="Fade" completeEffect="Fade" removedEffect="Fade" width="130" height="89" horizontalCenter="0" verticalCenter="0"/> <s:Rect id="imageRect" width="130" height="89"> <s:stroke> <s:SolidColorStroke color="0xFFFFFF" joints="miter" pixelHinting="true"/> </s:stroke> </s:Rect> </s:Group> <s:Label text="{data.title}" color="0xFFFFFF" fontWeight="bold"/> <s:Group> <s:layout> <s:HorizontalLayout gap="3"/> </s:layout> <s:Label text="Edit" color="0xFFFFFF" click="trace('edit');" textDecoration.up="underline" textDecoration.over="none"/> <s:Label text="|" color="0xFFFFFF"/> <s:Label text="Delete" color="0xFFFFFF" click="trace('delete');" textDecoration.up="underline" textDecoration.over="none"/> </s:Group> </s:ItemRenderer>

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• dhtmlxgrid: getting an xml string of grid data

  - by user823527

  The dhtmlxgrid documentation is saying that I should be able to get a string with the grid data with the serialize feature. mygrid.setSerializationLevel(true,true); var myXmlStr = mygrid.serialize(); I'd like to use that feature to get the updated grid data. But I don't get the xml string. Is that feature not available in the open source version? If I could get a csv string, that would also be OK. But I don't get that either. var gridcsv=mygrid.serializeToCSV(); document.getElementById("mytextareax").value = gridcsv; The html information for the grid is: <a href="#" onclick="savegrid();">Save Grid</a> <textarea id="mytextareax"><rows><row id='r1'><cell>index ... </rows></textarea> <div id="mytextarea" style="width:400px; height: 400px;"> </div> <div id="gridbox" style="width:600px; height:270px; background-color:white;"></div> <a href='#alfa' onClick="ser()">Reload grid with another structure</a> <br> The script for creating the grid is: <script> mygrid = new dhtmlXGridObject('gridbox'); mygrid.setImagePath("../../codebase/imgs/"); mygrid.loadXML("../common/grid500.xml"); function ser(){ mygrid.clearAll(true); mygrid.loadXML("../common/gridH3.xml"); } function savegrid(){ alert('save grid'); mygrid.setSerializationLevel(true,true); var myXmlStr = mygrid.serialize(); /* document.getElementById("mytextarea").innerHTML = myXmlStr; */ document.getElementById("mytextareax").value = myXmlStr; alert(myXmlStr); } </script> Is there any way to get the data out of the dhtmlx grid to be able to create my own xml file from it?

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• Calculate year for end date: PostgreSQL

  - by Dave Jarvis

  Background Users can pick dates as shown in the following screen shot: Any starting month/day and ending month/day combinations are valid, such as: Mar 22 to Jun 22 Dec 1 to Feb 28 The second combination is difficult (I call it the "tricky date scenario") because the year for the ending month/day is before the year for the starting month/day. That is to say, for the year 1900 (also shown selected in the screen shot above), the full dates would be: Dec 22, 1900 to Feb 28, 1901 Dec 22, 1901 to Feb 28, 1902 ... Dec 22, 2007 to Feb 28, 2008 Dec 22, 2008 to Feb 28, 2009 Problem Writing a SQL statement that selects values from a table with dates that fall between the start month/day and end month/day, regardless of how the start and end days are selected. In other words, this is a year wrapping problem. Inputs The query receives as parameters: Year1, Year2: The full range of years, independent of month/day combination. Month1, Day1: The starting day within the year to gather data. Month2, Day2: The ending day within the year (or the next year) to gather data. Previous Attempt Consider the following MySQL code (that worked): end_year = start_year + greatest( -1 * sign( datediff( date( concat_ws('-', year, end_month, end_day ) ), date( concat_ws('-', year, start_month, start_day ) ) ) ), 0 ) How it works, with respect to the tricky date scenario: Create two dates in the current year. The first date is Dec 22, 1900 and the second date is Feb 28, 1900. Count the difference, in days, between the two dates. If the result is negative, it means the year for the second date must be incremented by 1. In this case: Add 1 to the current year. Create a new end date: Feb 28, 1901. Check to see if the date range for the data falls between the start and calculated end date. If the result is positive, the dates have been provided in chronological order and nothing special needs to be done. This worked in MySQL because the difference in dates would be positive or negative. In PostgreSQL, the equivalent functionality always returns a positive number, regardless of their relative chronological order. Question How should the following (broken) code be rewritten for PostgreSQL to take into consideration the relative chronological order of the starting and ending month/day pairs (with respect to an annual temporal displacement)? SELECT m.amount FROM measurement m WHERE (extract(MONTH FROM m.taken) >= month1 AND extract(DAY FROM m.taken) >= day1) AND (extract(MONTH FROM m.taken) <= month2 AND extract(DAY FROM m.taken) <= day2) Any thoughts, comments, or questions? (The dates are pre-parsed into MM/DD format in PHP. My preference is for a pure PostgreSQL solution, but I am open to suggestions on what might make the problem simpler using PHP.) Versions PostgreSQL 8.4.4 and PHP 5.2.10

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• I get EXC_BAD_ACCESS when MaxConcurrentOperationCount > 1

  - by kudorgyozo

  Hello i am using NSOperationQueue to download images in the background. I have created a custom NSOperation to download the images. I put the images in table cells. The problem is if I do [operationQueue setMaxConcurrentOperationCount: 10] and i scroll down several cells the program crashes with EXC_BAD_ACCESS. Every time it crashes at the same place in the table. There are 3 cells one after the other which are for the same company and have the same logo so basically it should download the images 3 times. Every other time it works fine. - (void) main { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSURL *url = [[NSURL alloc] initWithString:self.imageURL]; debugLog(@"downloading image: %@", self.imageURL); //NSError *error = nil; NSData *data = [[NSData alloc] initWithContentsOfURL:url]; [url release]; UIImage *image = [[UIImage alloc] initWithData:data]; [data release]; if (image) { if (image.size.width != ICONWIDTH && image.size.height != ICONHEIGHT) { UIImage *resizedImage; CGSize itemSize = CGSizeMake(ICONWIDTH, ICONHEIGHT); UIGraphicsBeginImageContext(itemSize); CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height); [image drawInRect:imageRect]; resizedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.theImage = resizedImage; } else { self.theImage = image; } [image release]; } [delegate didFinishDownloadingImage: self]; [pool release]; } This is how i handle downloading the images. If i comment out [delegate didFinishDownloadingImage: self]; in the function above it doesn't crash but of course it is useless. -(void) didFinishDownloadingImage:(ImageDownloadOperation *) imageDownloader { [self performSelectorOnMainThread: @selector(handleDidFinishDownloadingImage:) withObject: imageDownloader waitUntilDone: FALSE]; } -(void) handleDidFinishDownloadingImage:(ImageDownloadOperation *)imageDownloadOperation { NSArray *visiblePaths = [self.myTableView indexPathsForVisibleRows]; CompanyImgDownloaderState *stateObject = (CompanyImgDownloaderState *)[imageDownloadOperation stateObject]; if ([visiblePaths containsObject: stateObject.indexPath]) { //debugLog(@"didFinishDownloadingImage %@ %@", imageDownloader.theImage); UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath: stateObject.indexPath]; UIImageView *imageView = (UIImageView *)[cell viewWithTag: 1]; if (imageDownloadOperation.theImage) { imageView.image = imageDownloadOperation.theImage; stateObject.company.icon = imageDownloadOperation.theImage; } else { imageView.image = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; stateObject.company.icon = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; } } }

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• int, short, byte performance in back-to-back for-loops

  - by runrunraygun

  (background: http://stackoverflow.com/questions/1097467/why-should-i-use-int-instead-of-a-byte-or-short-in-c) To satisfy my own curiosity about the pros and cons of using the "appropriate size" integer vs the "optimized" integer i wrote the following code which reinforced what I previously held true about int performance in .Net (and which is explained in the link above) which is that it is optimized for int performance rather than short or byte. DateTime t; long a, b, c; t = DateTime.Now; for (int index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } a = DateTime.Now.Ticks - t.Ticks; t = DateTime.Now; for (short index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } b=DateTime.Now.Ticks - t.Ticks; t = DateTime.Now; for (byte index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } c=DateTime.Now.Ticks - t.Ticks; Console.WriteLine(a.ToString()); Console.WriteLine(b.ToString()); Console.WriteLine(c.ToString()); This gives roughly consistent results in the area of... ~950000 ~2000000 ~1700000 which is in line with what i would expect to see. However when I try repeating the loops for each data type like this... t = DateTime.Now; for (int index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } for (int index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } for (int index = 0; index < 127; index++) { Console.WriteLine(index.ToString()); } a = DateTime.Now.Ticks - t.Ticks; the numbers are more like... ~4500000 ~3100000 ~300000 Which I find puzzling. Can anyone offer an explanation? NOTE: In the interest of compairing like for like i've limited the loops to 127 because of the range of the byte value type. Also this is an act of curiosity not production code micro-optimization.

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• Visual Web Developer 2008 Express and XHTML 1.1 (not applying)

  - by Mike Valeriano

  Hello. I may be missing something since I'm not used to work with IDEs for web development, so please understand if I'm doing something stupid. I've picked a copy of Beginning ASP.NET 3.5 in C# and VB to try and learn this thing quickly. I'm no HTML guru, but I know something about the DTDs and I want to either use XHTML 1.0 Strict or XHTML 1.1 while learning the ins and outs of ASP.NET. Following the book (just started actually), I'm not having any trouble understanding the concepts, since I have a C# background, but what I don't understand is how VWD goes about applying the schema you select for validation. The book explains that the drop-down list on the toolbar is enough to set this, so that's what I did: I've selected XHTML 1.1 (since there is no 1.0 strict option, what I find really odd) and then started the project. The thing is that the code generated automatically for the Default page had the XHTML 1.0 transitional DTD. Every other page added had the same DTD, even though XHTML 1.1 is still the selected schema in the drop-down list. I decided to test it out and there it was: inserting some text in the design view and then applying a bold formatting just inserted < b tags on the code. Changing color does add a span tag with added CSS though. What I want to know is: if I want strict XHTML (or 1.1) should I just code it manually? Or is there a "fix" for this problem (having a schema selected but not applied by the IDE)? Am I missing something really easy and dumb? I have no problem with coding it manually - I actually prefer doing that. The thing is that I really wanna try this WYSIWYG approach for once, since some developers swear by it. Plus I don't know yet if I'll need special tags for ASP.NET, so I think having them inserted automatically should be the best practice. I couldn't find any similar problems around (MSDN, Google, here), and as far as the book goes (up to the point I've read), this is the expected VWD behavior, which I find suspect at least. Sorry for the long text (and poor English - not my primary language). Thanks in advance for any help/tips.

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• Ho to make Histogram Normalize and Equalize in java using JAI library?

  - by Jay

  I m making App in java using Swing component and JAI library. I make histogram of black and white or gray scale image.Is this method of making histogram correct? iif it is correct then how can i do normalization and Equalization of histogram in my App in java using JAI library?my code is below. in my code i make BufferedImage object and then make and plot histogram of that image . enter code here import java.awt.Color; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.IOException; import javax.media.jai.JAI; import javax.media.jai.PlanarImage; import javax.swing.*; public class FinalHistogram extends JPanel { static int[] bins = new int[256]; static int[] newBins = new int[256]; static int x1 = 0, y1 = 0; static PlanarImage image = JAI.create("fileload", "alp_finger.tiff"); static BufferedImage bi = image.getAsBufferedImage(); FinalHistogram(int[] pbins) { for (int i = 0; i < 256; i++) { bins[i] = pbins[i]; newBins[i] = 0; } repaint(); } @Override protected void paintComponent(Graphics g) { for (int i = 0; i < 256; i++) { g.drawLine(150 + i, 300, 150 + i, 300 - (bins[i] / 300)); if (i == 0 || i == 255) { String sr = new Integer((i)).toString(); g.drawString(sr, 150 + i, 305); } System.out.println("bin[" + i + "]===" + bins[i]); } } public static void main(String[] args) throws IOException { int[] sbins = new int[256]; int pixel = 0; int k = 0; for (int x = 0; x < bi.getWidth(); x++) { for (int y = 0; y < bi.getHeight(); y++) { pixel = bi.getRaster().getSample(x, y, 0); k = (int) (pixel / 256); sbins[k]++; //pixel = bi.getRGB(x, y) & 0x000000ff; //k=pixel; //int[] pixels = m_image.getRGB(0, 0, m_image.getWidth(), m_image.getHeight(), null, 0, m_image.getWidth()); //short currentValue = 0; //int red,green,blue; //for(int i = 0; i<pixels.length; i++){ //red = (pixels[i] >> 16) & 0x000000FF; //green = (pixels[i] >>8 ) & 0x000000FF; //blue = pixels[i] & 0x000000FF; //currentValue = (short)((red + green + blue) / 3); //Current value gives the average //Disregard the alpha //assert(currentValue >= 0 && currentValue <= 255); //Something is awfully wrong if this goes off... //m_histogramArray[currentValue] += 1; //Increment the specific value of the array //} } } JTabbedPane jtp = new JTabbedPane(); jtp.addTab("Histogram", new JScrollPane(new FinalHistogram(sbins))); JFrame frame = new JFrame(); frame.setSize(500, 500); frame.add(new JScrollPane(jtp)); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }

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• Rails 3 and Bootstrap 2.1.0 - can't fix my footer

  - by ExiRe

  I have Rails application with bootstrap 2.1.0 (i use twitter-bootstrap-rails gem for that). But i can't get working footer. It is not visible unless i scroll down the page. I can't get how to fix that. Application.html.haml !!! %html %head %title MyApp = stylesheet_link_tag "application", :media => "all" = javascript_include_tag "application" = csrf_meta_tags %meta{ :name => "viewport", :content => "width=device-width, initial-scale=1.0" } %body %div{ :class => "wrapper" } = render 'layouts/navbar_template' %div{ :class => "container-fluid" } - flash.each do |key, value| = content_tag( :div, value, :class => "alert alert-#{key}" ) %div{ :class => "row-fluid" } %div{:class => "span10"} =yield %div{:class => "span2"} %h2 Test sidebar %footer{ :class => "footer" } = debug(params) if Rails.env.development? bootstrap_and_overrides.css.less @import "twitter/bootstrap/bootstrap"; body { padding-top: 60px; } @import "twitter/bootstrap/responsive"; // Set the correct sprite paths @iconSpritePath: asset-path('twitter/bootstrap/glyphicons-halflings.png'); @iconWhiteSpritePath: asset-path('twitter/bootstrap/glyphicons-halflings-white.png'); // Set the Font Awesome (Font Awesome is default. You can disable by commenting below lines) // Note: If you use asset_path() here, your compiled boostrap_and_overrides.css will not // have the proper paths. So for now we use the absolute path. @fontAwesomeEotPath: '/assets/fontawesome-webfont.eot'; @fontAwesomeWoffPath: '/assets/fontawesome-webfont.woff'; @fontAwesomeTtfPath: '/assets/fontawesome-webfont.ttf'; @fontAwesomeSvgPath: '/assets/fontawesome-webfont.svg'; // Font Awesome @import "fontawesome"; // Your custom LESS stylesheets goes here // // Since bootstrap was imported above you have access to its mixins which // you may use and inherit here // // If you'd like to override bootstrap's own variables, you can do so here as well // See http://twitter.github.com/bootstrap/less.html for their names and documentation // // Example: // @linkColor: #ff0000; //MY CSS IS HERE. html, body { height: 100%; } footer { color: #666; background: #F5F5F5; padding: 17px 0 18px 0; border-top: 1px solid #000; } footer a { color: #999; } footer a:hover { color: #efefef; } .wrapper { min-height: 100%; height: auto !important; height: 10px; margin-bottom: -10px; }

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• Modeling distribution of performance measurements

  - by peterchen

  How would you mathematically model the distribution of repeated real life performance measurements - "Real life" meaning you are not just looping over the code in question, but it is just a short snippet within a large application running in a typical user scenario? My experience shows that you usually have a peak around the average execution time that can be modeled adequately with a Gaussian distribution. In addition, there's a "long tail" containing outliers - often with a multiple of the average time. (The behavior is understandable considering the factors contributing to first execution penalty). My goal is to model aggregate values that reasonably reflect this, and can be calculated from aggregate values (like for the Gaussian, calculate mu and sigma from N, sum of values and sum of squares). In other terms, number of repetitions is unlimited, but memory and calculation requirements should be minimized. A normal Gaussian distribution can't model the long tail appropriately and will have the average biased strongly even by a very small percentage of outliers. I am looking for ideas, especially if this has been attempted/analysed before. I've checked various distributions models, and I think I could work out something, but my statistics is rusty and I might end up with an overblown solution. Oh, a complete shrink-wrapped solution would be fine, too ;) Other aspects / ideas: Sometimes you get "two humps" distributions, which would be acceptable in my scenario with a single mu/sigma covering both, but ideally would be identified separately. Extrapolating this, another approach would be a "floating probability density calculation" that uses only a limited buffer and adjusts automatically to the range (due to the long tail, bins may not be spaced evenly) - haven't found anything, but with some assumptions about the distribution it should be possible in principle. Why (since it was asked) - For a complex process we need to make guarantees such as "only 0.1% of runs exceed a limit of 3 seconds, and the average processing time is 2.8 seconds". The performance of an isolated piece of code can be very different from a normal run-time environment involving varying levels of disk and network access, background services, scheduled events that occur within a day, etc. This can be solved trivially by accumulating all data. However, to accumulate this data in production, the data produced needs to be limited. For analysis of isolated pieces of code, a gaussian deviation plus first run penalty is ok. That doesn't work anymore for the distributions found above. [edit] I've already got very good answers (and finally - maybe - some time to work on this). I'm starting a bounty to look for more input / ideas.

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• C# or C++ game: many 16 color images loaded into RAM. Efficient solution?

  - by user560639

  I am in the planning stages of creating a fighting game and am unsure how to handle one issue relating to memory. Background info: - Still debating whether to use C# (XNA) or C++. We do not want to commit to either until we have explored how to solve this problem in both languages. - Using a max of 256MB RAM would be great if possible. - Two characters will be present at a time, and these characters can only change between battles. There is time to load/free memory between battles, but the game needs to run at a constant 60 drawn frames per second during combat. Each frame is 16.67ms - The total number of images per character is in the low hundreds. Each image is roughly 200x400 pixels. Only one image from each character will be displayed at any given moment. Uncompressed, each image takes roughly 300kb from my calculations; upwards of 100MB for a whole character. This is pushing too close to the 256MB limit given that memory will be needed for some other resources as well. Since each image can be made with a total of 16 colors. Theoretically I should be able to use 1/8th the space if I can take advantage of this. I've looked around but haven't found any word of native support for paletted images. (Storing each pixel using fewer bits that each map to a 32-bit RGBa color) I was considering making my own file format with 4 bits per pixel (and some extra palette info), loading all the images of this new format into RAM before battle, and then when drawing any specific image, decompress only that image into a raw image so it can be rendered properly. I don't know if it's realistic to perform so many assignment operations (appx 200x400 for each character = 160k) each frame. It sounds very hacky to me. Does anyone have advice on whether my solution sounds reasonable, and if there is perhaps a better one available? Thanks so much! (I also attempted to use an image with only 1 channel, then use a shader to perform a series of if statements to translate various values into other colors. Unfortunately, there were too many lines of code for the shader. It is also rather hacky and does not scale well.)

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• Android: SlidingDrawer disappears under SurfaceView

  - by ykrasik

  Hi, I'm trying to create a SlidingDrawer with LinearLayout content over a FrameLayout. At first it all seems fine, I get my SlidingDrawer's handle at the bottom of the screen. But then, if I start dragging the handle up and the content starts showing, it gets clipped by the border rectangle of the handle. If I drag the handle all the way up the entire content eventually gets shown, however if I now drag the handle down, it will be clipped by the border rectangle of the content. Also, if the handle is all the way up, as soon as I start dragging it the whole content disappears. I can still click on where the handle should be on the screen, drag it and the content would show, but I need to guess where the handle is. What seems to be causing this is the fact that I have a SurfaceView in the xml file just before SlidingDrawer. Removing the view from the xml solves this problem, however I need this view. Here's the xml: <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- Removing this DrawView from here solves the problem --> <com.package.DrawView android:id="@+id/main" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <SlidingDrawer android:id="@+id/SlidingDrawer" android:layout_width="wrap_content" android:layout_height="wrap_content" android:allowSingleTap="true" android:animateOnClick="true" android:handle="@+id/slideHandleButton" android:content="@+id/contentLayout" android:padding="10dip"> <Button android:id="@+id/slideHandleButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/sliding_button"> </Button> <LinearLayout android:id="@+id/contentLayout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <Button android:id="@+id/clearButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Test"> </Button> </LinearLayout> </SlidingDrawer> </FrameLayout> Java: package com.package; import android.app.Activity; import android.os.Bundle; public class SlideTest extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } } package com.package; import android.content.Context; import android.util.AttributeSet; import android.view.SurfaceView; public class DrawView extends SurfaceView { public DrawView(Context context, AttributeSet attrs) { super(context, attrs); } } Edit: I just noticed that if DrawView extends View and not SurfaceView this problem goes away. However, I'm using a dedicated drawing thread and according to the documentation (and LunarLander example) when using a dedicated drawing thread, it should draw to a SurfaceView. Any help would be greatly appreciated!

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• point light illumination using Phong model

  - by Myx

  Hello: I wish to render a scene that contains one box and a point light source using the Phong illumination scheme. The following are the relevant code snippets for my calculation: R3Rgb Phong(R3Scene *scene, R3Ray *ray, R3Intersection *intersection) { R3Rgb radiance; if(intersection->hit == 0) { radiance = scene->background; return radiance; } ... // obtain ambient term ... // this is zero for my test // obtain emissive term ... // this is also zero for my test // for each light in the scene, obtain calculate the diffuse and specular terms R3Rgb intensity_diffuse(0,0,0,1); R3Rgb intensity_specular(0,0,0,1); for(unsigned int i = 0; i < scene->lights.size(); i++) { R3Light *light = scene->Light(i); R3Rgb light_color = LightIntensity(scene->Light(i), intersection->position); R3Vector light_vector = -LightDirection(scene->Light(i), intersection->position); // check if the light is "behind" the surface normal if(normal.Dot(light_vector)<=0) continue; // calculate diffuse reflection if(!Kd.IsBlack()) intensity_diffuse += Kd*normal.Dot(light_vector)*light_color; if(Ks.IsBlack()) continue; // calculate specular reflection ... // this I believe to be irrelevant for the particular test I'm doing } radiance = intensity_diffuse; return radiance; } R3Rgb LightIntensity(R3Light *light, R3Point position) { R3Rgb light_intensity; double distance; double denominator; if(light->type != R3_DIRECTIONAL_LIGHT) { distance = (position-light->position).Length(); denominator = light->constant_attenuation + (light->linear_attenuation*distance) + (light->quadratic_attenuation*distance*distance); } switch(light->type) { ... case R3_POINT_LIGHT: light_intensity = light->color/denominator; break; ... } return light_intensity; } R3Vector LightDirection(R3Light *light, R3Point position) { R3Vector light_direction; switch(light->type) { ... case R3_POINT_LIGHT: light_direction = position - light->position; break; ... } light_direction.Normalize(); return light_direction; } I believe that the error must be somewhere in either LightDirection(...) or LightIntensity(...) functions because when I run my code using a directional light source, I obtain the desired rendered image (thus this leads me to believe that the Phong illumination equation is correct). Also, in Phong(...), when I computed the intensity_diffuse and while debugging, I divided light_color by 10, I was obtaining a resulting image that looked more like what I need. Am I calculating the light_color correctly? Thanks.

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