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• Has Twisted changed its dependencies?

  - by cdecker

  Hi all, I'm currently working on a Python/Twisted project which is to be distributed and tested on Planetlab. For some reason my code was working on friday and now that I wanted to test a minor change it refuses to work at all: Traceback (most recent call last): File "acn_a4/src/node.py", line 6, in <module> from twisted.internet.protocol import DatagramProtocol File "/usr/lib/python2.5/site-packages/Twisted-10.0.0-py2.5-linux-i686.egg/twisted/__init__.py", line 18, in <module> from twisted.python import compat File "/usr/lib/python2.5/site-packages/Twisted-10.0.0-py2.5-linux-i686.egg/twisted/python/compat.py", line 146, in <module> import operator File "/home/cdecker/dev/acn/acn_a4/src/operator.py", line 7, in <module> File "/home/cdecker/acn_a4/src/node.py", line 6, in <module> from twisted.internet.protocol import DatagramProtocol File "/usr/lib/python2.5/site-packages/Twisted-10.0.0-py2.5-linux-i686.egg/twisted/internet/protocol.py", line 20, in <module> from twisted.python import log, failure, components File "/usr/lib/python2.5/site-packages/Twisted-10.0.0-py2.5-linux-i686.egg/twisted/python/log.py", line 19, in <module> from twisted.python import util, context, reflect File "/usr/lib/python2.5/site-packages/Twisted-10.0.0-py2.5-linux-i686.egg/twisted/python/util.py", line 5, in <module> import os, sys, hmac, errno, new, inspect, warnings File "/usr/lib/python2.5/inspect.py", line 32, in <module> from operator import attrgetter ImportError: cannot import name attrgetter And since I'm pretty new to python I have no idea what could have caused this problem. All suggestions are welcome :-)

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• NSKeyedArchiver on NSArray has large size overhead

  - by redguy

  I'm using NSKeyedArchiver in Mac OS X program which generates data for iPhone application. I found out that by default, resulting archives are much bigger than I expected. Example: NSMutableArray * ar = [NSMutableArray arrayWithCapacity:10]; for (int i = 0; i < 100000; i++) { NSString * s = [NSString stringWithFormat:@"item%06d", i]; [ar addObject:s]; } [NSKeyedArchiver archiveRootObject:ar toFile: @"NSKeyedArchiver.test"]; This stores 10 * 100000 = 1M bytes of useful data, yet the size of the resulting file is almost three megabytes. The overhead seems to be growing with number of items in the array. In this case, for 1000 items, the file was about 22k. "file" reports that it is a "Apple binary property list" (not the XML format). Is there an simple way to prevent this huge overhead? I wanted to use the NSKeyedArchiver for the simplicity it provides. I can write data to my own, non-generic, binary format, but that's not very elegant. Also, aggregating the data into large chunks and feeding these to the NSKeyedArchiver should work, but again, that kinda beats the point of using simple&easy&ready to use archiver. Am I missing some method call or usage pattern that would reduce this overhead?

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• NSBorderlessWindow not responding to CMD-W/CMD-M

  - by Sean

  I have an NSBorderlessWindow subclass of NSWindow with a transparent and non-opaque background (so it's non-rectangular in appearance). I've added my own buttons to function as the close and minimize buttons when I click them, but for some reason the window will not respond to CMD-W or CMD-M like a normal one does. I have my NSWindow subclass set to return YES to canBecomeKeyWindow and canBecomeMainWindow. My NIB still has all the standard menu items in it that are there when you create a new project - including the "Minimize" item in the Window menu with the default shortcut CMD-M defined. It's hooked up to send performMiniaturize: to the first responder. However it is not enabled when the app is run, so it seems like it must be asking the window if it can minimize and the window says no or something. (I'm still very new to OSX/Cocoa.) What am I missing? Also, and maybe this is related, my borderless window has a shadow enabled - but unlike a normal titled window, when I make my window the active/front window by clicking on it, the shadow doesn't change. Normally an OSX focused window has a slightly larger/darker shadow to make it stand out more but mine never changes the shadow. It's like I'm missing something to make the OS treat this window as a real/normal/main window or something and as a result I lose the shadow change and functioning CMD-W/CMD-M.

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• Normalizing (webdav) unicode paths

  - by Evert

  Hi guys, I'm working on a WebDAV implementation for PHP. In order to make it easier for Windows and other operating systems to work together, I need jump through some character encoding hoops. Windows uses ISO-8859-1 in it's HTTP request, while most other clients encode anything beyond ascii as UTF-8. My first approach was to ignore this altogether, but I quickly ran into issues when returning urls. I then figured it's probably best to normalize all urls. Using u¨ as an example. This will get sent over the wire by OS/X as u%CC%88 (this is codepoint U+0308) Windows sents this as: %FC (latin1) But, doing a utf8_encode on %FC, I get : %C3%BC (this is codepoint U+00FC) Should I treat %C3%BC and u%CC%88 as the same thing? If so.. how? Not touching it seems to work OK for windows. It somehow understands that it's a unicode character, but updating the same file throws an error (for no particular reason). I'd be happy to provide more information.

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• Can SOTI's MobiControl software interfere with an ASP.Net web service?

  - by MusiGenesis

  We have a set of WinMo (5.0) devices running a .NET CF application that talks to an ASP.Net web service running on a server. The devices connect to the network either via ActiveSync through a networked PC or directly to the network via an Ethernet dongle. In our development environment, the communication between devices and web service is 100% reliable. In our production environment, the communications are failing erratically and unpredictably. Sometimes calls to the web service (even to a simple test call that just returns a boolean) begin failing every time on a particular device, with the error message "Could not establish connection to network." This is usually fixed by flip-flopping the selected combo box values on the SETTINGS | NETWORKS screen. Sometimes calls on a particular device begin failing with a generic "WebException" message. The fix for this problem (so far) is either to reset the device (i.e. reinstall the OS) or else it just can't be fixed on some devices. To the best of our knowledge, everything about the DEV and PROD systems are the same (same server and device specs). The most obvious difference to us is that the PROD devices are all controlled by SOTI's MobiControl (which is server-side software that communicates with a SOTI client application installed on each device), whereas our DEV environment does not have SOTI installed anywhere (obviously we should have it there as well - long story). Does anybody have any experience with SOTI MobiControl and/or know of any documented problems where SOTI interferes with other communication mechanisms on a device?

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• Cocoa Core data: cannot save Created Items in NSTableview

  - by Paul Rostorp

  Hello, I'm am a beginner in mac os x development and am trying to get started with all this. Here is my problem : I've create a non-document based cocoa app using core data as storage. I've added an entity and attributes to the xdatamodel. In IB i've created an NSArrayController and linked it properly. I've created an nstableview binded to the nsarraycontroller. Next I added a button linked to nsarraycontroller with the " add: " method. When I try it out, I can add and edit the items in the table. Here comes the problem: Core data is supposed to save everything automatically, but to make sure i linked the "save" button in the menu to the appdelegate and to the " file's owner" , first responder, application... everything possible ( with both " save :" and " saveaction:" methods ). And still it doesn't save when clicking save: when I restart the cell created ( and renamed ) are gone. And also, I didn't even edit the source code yet; core data for such simple tasks is supposed to only need Interface builder. Please help me for this, I haven't found any threads resolving this problem. Thank you in advance.

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• Android Application is unexpectedly stopped error when button is clicked

  - by user1794499

  Hi there I'm totally new to Android development and I'm working in my android application my application includes a forum where users can post, comment and have their discussion there.... So I'm working in the interface but I get error when I click on the button I directs me to the signup page can somebody please help me with this error this is the code of the mainuserinterface.java for the mainuserinterface.xml file where the button resides. and the signupform.class is the java file for the next activity triggered when the button is clicked the error I receive is the application is unexpectedly stopped.. Hope I make it clear for you guys package com.mohammed.watzIslam; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class mainuserinterface extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.mainuserinterface); // this is the button where I receive errors when I click Button forum = (Button) findViewById(R.id.next); forum.setOnClickListener(new View.OnClickListener() { public void onClick(View view){ Intent myIntent = new Intent (view.getContext(), signupform.class); startActivityForResult (myIntent, 0); } }); //these two button still not directing to any next activity yet Button button1 = (Button) findViewById(R.id.next); forum.setOnClickListener(new View.OnClickListener() { public void onClick(View view){ Intent myIntent1 = new Intent (view.getContext(), signupform.class); startActivityForResult (myIntent1, 0); } }); Button button2 = (Button) findViewById(R.id.next); forum.setOnClickListener(new View.OnClickListener() { public void onClick(View view){ Intent myIntent2 = new Intent (view.getContext(), signupform.class); startActivityForResult (myIntent2, 0); } }); } }

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• Get Eclipse to recognize the maps api

  - by NickTFried

  Hi I'm developing an Android app and trying to incorporate maps into one of my sub-activities. Having followed all of the instructions from Android, my java file will not recognize the "MapActivity" or the import statements to include the needed api. Here is my XML manifest and my class file. <?xml version="1.0" encoding="utf-8"?> <uses-permission android:name="android.permissions.INTERNET"/> <uses-permission android:name="android.permissions.ACCESS_FINE_LOCATION"/> <application android:icon="@drawable/icon" android:label="@string/app_name"> <uses-library android:name="com.google.android.maps" /> <activity android:name=".CadetCommand" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="RedLight"></activity> <activity android:name="PTCalculator"></activity> </application> <uses-sdk android:minSdkVersion="7"/> here is my java file: package edu.elon.cs.mobile; import com.google.android.maps.MapActivity; import com.google.android.maps.MapView; import android.os.Bundle; public class LandNav extends MapActivity{ } Any suggestion would help.

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• Testing background audio in the simulator

  - by Cactuar

  I'm experimenting with the new background audio service in iPhone OS 4.0 but I can't get it to work in the simulator. According to this page: iPhone Application Programming Guide: Executing Code in the Background it seems that all I have to do is add the a UIBackgroundModes key with an array containing audio to my Info.plist file and the audio my application plays should automatically continue when I switch to another app. I have done this but the audio still pauses as I switch to another app, when I switch back it continues where it left off. This is the code I'm using to play the sound: NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audio.mp3", [[NSBundle mainBundle] resourcePath]]]; NSError *error; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error]; audioPlayer.numberOfLoops = -1; if (audioPlayer == nil) NSLog(@"%@", [error userInfo]); else [audioPlayer play]; Has anyone gotten this to work? Could it be that it would work on an actual device and it's just a problem with the simulator? I'm a bit hesitant to install 4.0 on my phone since I've heard it's still very buggy. Wish I had another device to use only for development.

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• Add new language to existing Xcode project localization

  - by leolobato

  Hey guys, I'm working on an existing Xcode 3.2.2 Universal iPhone OS project which is already localized for 4 languages (EN, IT, DE and FR). We are now adding a new language (JA) into this project. Each existing .lproj folder (en.lproj, it.lproj, de.lproj and fr.lproj) has almost 60 files - including PNGs, HTMLs and the Localizable.strings file. Each one of those files appear as localized groups inside Groups & Files in Xcode. They're spread all over the tree. If I right-click one of those groups (say, Localizable.strings) inside Xcode, Get Info, click on "Add Localization" and type "ja" - as the Xcode docs suggest, nothing happens. From what I read in this newgroup, it's possibly because of the way those folders are named. If they were named like English.lproj and Italian.lproj, this was supposed to work. So, for me to actually import a new language localized file into the existing group, I have to: Right-click the localized group file. Choose "Add Existing File". Select the corresponding file inside the ja.lproj folder. I'm about to get a new ja.lproj folder with those 60 localized files and would love to import them in the project in a way that doesn't involve searching for every single file in Groups & Trees and performing those steps... for every one of those 60 files. Is that possible? Is there a right (or better) way to import a new language into this Xcode project?

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• Qmake does not specify a valid qt

  - by Comptrol

  After installing Qt SDK for Open Source C++ development on Mac OS by following the respective steps Note for the binary package: If you have the binary package, simply double-click on the Qt.mpkg and follow the instructions to install Qt. . Yes, that is all I have done to install Qt on MacOsX. Everything was going fine, until I run a sample application, of which compile output resulted in: No valid Qt version set. Set one in Preferences Error while building project qtilk When executing build step 'QMake' Canceled build. Then I tried to change the respective Qt version in Preferences and I hovered over the Path, I realized my mkspec isn't set: Then I tried querying qmake by qmake -query : QT_INSTALL_PREFIX:/ QT_INSTALL_DATA:/usr/local/Qt4.6 QT_INSTALL_DOCS:/Developer/Documentation/Qt QT_INSTALL_HEADERS:/usr/include QT_INSTALL_LIBS:/Library/Frameworks QT_INSTALL_BINS:/Developer/Tools/Qt QT_INSTALL_PLUGINS:/Developer/Applications/Qt/plugins QT_INSTALL_TRANSLATIONS:/Developer/Applications/Qt/translations QT_INSTALL_CONFIGURATION:/Library/Preferences/Qt QT_INSTALL_EXAMPLES:/Developer/Examples/Qt/ QT_INSTALL_DEMOS:/Developer/Examples/Qt/Demos QMAKE_MKSPECS:/usr/local/Qt4.6/mkspecs QMAKE_VERSION:2.01a QT_VERSION:4.6.2 QMAKE_MKSPECS seems to be set here?? Will setting my mkspec solve my building problem? I tried setting by typing export mkspec=macx-g++. Still, mkspec seems not to be set to anything. I am all ears waiting for your answers. Thanks in advance.

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• Submenu within menu within menu ?

  - by abhishek mishra

  On pressing menu button , I have 2 options : Add & more. On click of more i have 3 options : Organize ,Export & Exit On click of Organize i want other 5 options. On click of more i get my submenu. But i want other 5 options on click of organize.How do i proceed??? My code in parts is as follows : XML file------------------------------- <item android:id="@+id/more" android:title="@string/moreMenu" android:icon="@drawable/icon"> <menu> <item android:id="@+id/Organize" android:title="@string/Organize" /> <item android:id="@+id/Export" android:title="@string/Export" /> </menu> </item> android:id="@+id/add" android:title="@string/addMenu" android:icon="@drawable/add"/ Java------------------------- package com.tcs.QuickNotes; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.Toast; public class ToDoList extends Activity { Menu menu; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.todolist); } public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.layout.categorymenu, menu); return true; } public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.more: Toast.makeText(this, "You pressed more!", Toast.LENGTH_LONG).show(); //(What needs to be done from here) return true; case R.id.add: Toast.makeText(this, "You pressed add!", Toast.LENGTH_LONG).show(); return true; } return false; } public boolean onPrepareOptionsMenu(Menu menu) { return true; } }

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• How to open a document using an application launched via NSTask?

  - by zneak

  Hello world, I've grown tired of the built-in open Mac OS X command, mostly because it runs programs with your actual user ID instead of the effective user ID; this results in the fact sudo open Foo opens Foo with its associated application with your account instead of the root account, and it annoys me. So I decided to make some kind of replacement. So far I've been successful: I can open any program under the open -a or open -b fashion, and support optionally waiting. I'm using NSTask for that purpose. However, I'd like to be able to open documents too. As far as I can see, you need to use NSWorkspace for that, but using NSWorkspace to launch programs results in them being launched with your account's credentials instead of your command line program's credentials. Which is precisely what the default open tool does, and precisely what I don't want. So, how can I have a program request that another program opens a document without using NSWorkspace? From the NSTask object, I can have the process ID, but that's about it.

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• Android beginner: understanding MotionEvent actions

  - by Dave

  I am having trouble getting my activity to return a MotionEvent.ACTION_UP. Probably a beginner's error. In LogCat, I'm only seeing the ACTION_MOVE event (which is an int value of 3). I also see the X/Y coordinates. No ACTION_DOWN and no ACTION_UP. I looked everywhere for a solution. I found one question on a forum that seems to be the same as my issue, but no solution is proposed: http://groups.google.com/group/android-developers/browse_thread/thread/9a9c23e40f02c134/bf12b89561f204ad?lnk=gst&q=ACTION_UP#bf12b89561f204ad Here's my code: import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.webkit.WebView; public class Brand extends Activity { public WebView webview; public float currentXPosition; public float currentYPosition; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); webview = new WebView(this); setContentView(webview); webview.loadUrl("file:///android_asset/Brand.html"); } @Override public boolean onTouchEvent(MotionEvent me) { int action = me.getAction(); currentXPosition = me.getX(); currentYPosition = me.getY(); Log.v("MotionEvent", "Action = " + action); Log.v("MotionEvent", "X = " + currentXPosition + "Y = " + currentYPosition); if (action == MotionEvent.ACTION_MOVE) { // do something } if (action == MotionEvent.ACTION_UP) { // do something } return true; } }

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• Compilation error while compiling an existing code base

  - by brijesh

  Hi, While building an existing code base on Mac OS using its native build setup I am getting some basic strange error while compilation phase. /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/bits/locale_facets.h: In constructor 'std::collate_byname<_CharT::collate_byname(const char*, size_t)': /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/bits/locale_facets.h:1072: error: '_M_c_locale_collate' was not declared in this scope /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/ppc-darwin/bits/messages_members.h: In constructor 'std::messages_byname<_CharT::messages_byname(const char*, size_t)': /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/ppc-darwin/bits/messages_members.h:79: error: '_M_c_locale_messages' was not declared in this scope /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits: At global scope: /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:897: error: 'float __builtin_huge_valf()' cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:897: error: a function call cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:897: error: 'float __builtin_huge_valf()' cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:897: error: a function call cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:899: error: 'float __builtin_nanf(const char*)' cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:899: error: a function call cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:899: error: 'float __builtin_nanf(const char*)' cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:899: error: a function call cannot appear in a constant-expression /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:900: error: field initializer is not constant /Developer/SDKs/MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/limits:915: error: field initializer is not constant

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• Android AppWidget maps activity problem

  - by Andy Armstrong

  Right. So I have an app widget. It has 4 buttons, one one of the buttons I want it to show me the current location of the user on the map. So - I make a new activity as below: package com.android.driverwidget; import java.util.List; import android.os.Bundle; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.MyLocationOverlay; import com.google.android.maps.Overlay; public class MyLocation extends MapActivity{ public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); MapView myMapView = (MapView)findViewById(R.id.mapview); MapController mapController = myMapView.getController(); List<Overlay> overlays = myMapView.getOverlays(); MyLocationOverlay myLocationOverlay = new MyLocationOverlay(this, myMapView); overlays.add(myLocationOverlay); myLocationOverlay.enableMyLocation(); } protected boolean isRouteDisplayed() { return false; } } And then I added the appropriate uses library line to the manifest <activity android:name=".MyLocation" android:label="myLocation"> </activity> <uses-library android:name="com.google.android.maps" /> Ok yet - when I run the app the following errors occur, looks like it cannot find the MapActivity class, im running it on the GoogleApps 1.5 instead of normal android 1.5 as well. http://pastebin.com/m3ee8dba2 Somebody plz help me - i am now dying.

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• Graceful termination of NSApplication with Core Data and Grand Central Dispatch (GCD)

  - by Vincent Mac

  I have an Cocoa Application (Mac OS X SDK 10.7) that is performing some processes via Grand Central Dispatch (GCD). These processes are manipulating some Core Data NSManagedObjects (non-document-based) in a manner that I believe is thread safe (creating a new managedObjectContext for use in this thread). The problem I have is when the user tries to quit the application while the dispatch queue is still running. The NSApplication delegate is being called before actually quitting. - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender I get an error "Could not merge changes." Which is somewhat expected since there are still operations being performed through the different managedObjectContext. I am then presented with the NSAlert from the template that is generated with a core data application. In the Threading Programming Guide there is a section called "Be Aware of Thread Behaviors at Quit Time" which alludes to using replyToApplicationShouldTerminate: method. I'm having a little trouble implementing this. What I would like is for my application to complete processing the queued items and then terminate without presenting an error message to the user. It would also be helpful to update the view or use a sheet to let the user know that the app is performing some action and will terminate when the action is complete. Where and how would I implement this behavior?

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• Synchronization of Nested Data Structures between Threads in Java

  - by Dominik

  I have a cache implementation like this: class X { private final Map<String, ConcurrentMap<String, String>> structure = new HashMap...(); public String getValue(String context, String id) { // just assume for this example that there will be always an innner map final ConcurrentMap<String, String> innerStructure = structure.get(context); String value = innerStructure.get(id); if(value == null) { synchronized(structure) { // can I be sure, that this inner map will represent the last updated // state from any thread? value = innerStructure.get(id); if(value == null) { value = getValueFromSomeSlowSource(id); innerStructure.put(id, value); } } } return value; } } Is this implementation thread-safe? Can I be sure to get the last updated state from any thread inside the synchronized block? Would this behaviour change if I use a java.util.concurrent.ReentrantLock instead of a synchronized block, like this: ... if(lock.tryLock(3, SECONDS)) { try { value = innerStructure.get(id); if(value == null) { value = getValueFromSomeSlowSource(id); innerStructure.put(id, value); } } finally { lock.unlock(); } } ... I know that final instance members are synchronized between threads, but is this also true for the objects held by these members? Maybe this is a dumb question, but I don't know how to test it to be sure, that it works on every OS and every architecture.

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• Experiences with (free) embedded TCP / IP stacks?

  - by Dan

  Does anyone have especially good (or bad) experiences with any of the following embedded TCP / IP stacks? uIP lwIP Bentham's TCP/IP Lean implementation The TCP/IP stack from this book My needs are for a solid, easy-to-port stack. Code size isn't terribly important, performance is relatively important, but ease of use & porting is very important. The system will probably use an RTOS, that hasn't been decided, but in my experience most stacks can be used with or without an RTOS. Most likely the platform will be an ARM variant (ARM7 or CM3 in all likelihood). Not too concerned about bolting the stack to the Ethernet driver, so that isn't a big priority in the selection. I'm not terribly interested in extracting a stack out of an OS, such as Linux, RTEMS, etc. I'm also not interested in commercial offerings such as Interniche, Micrium, etc... The stack doesn't need all sorts of bells & whistles, doesn't need IPv6, and I don't need any stuff on top of it (web servers, FTP servers, etc..) In fact it's possible that I'll only use UDP, although I can envision a couple scenarios where TCP would be preferable. Experiences with other stacks I've missed are of course also very much of interest. Thanks for your time & input.

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• What can cause Windows to unhook a low level (global) keyboard hook?

  - by Davy8

  We have some global keyboard hooks installed via SetWindowsHookEx with WH_KEYBOARD_LL that appear to randomly get unhooked by Windows. We verified that they hook was no longer attached because calling UnhookWindowsHookEx on the handle returns false. (Also verified that it returns true when it was working properly) There doesn't seem to be a consistent repro, I've heard that they can get unhooked due to timeouts or exceptions getting thrown, but I've tried both just letting it sit on a breakpoint in the handling method for over a minute, as well as just throwing a random exception (C#) and it still appears to work. In our callback we quickly post to another thread, so that probably isn't the issue. I've read about solutions in Windows 7 for setting the timeout higher in the registry because Windows 7 is more aggressive about the timeouts apparently (we're all running Win7 here, so not sure if this occurs on other OS's) , but that doesn't seem like an ideal solution. I've considered just having a background thread running to refresh the hook every once in a while, which is hackish, but I don't know of any real negative consequences of doing that, and it seems better than changing a global Windows registry setting. Any other suggestions or solutions? The delegates are not being GC'd since they're static members, which is one cause that I've read about.

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• How do I get the F1-F12 keys to switch screens in gnu screen in cygwin when connecting via SSH?

  - by Mikey

  I'm connecting to a desktop running cygwin via SSH from the terminal app in Mac OS X. I have already started screen on the cygwin side and can connect to it over the SSH session. Furthermore, I have the following in the .screenrc file: bindkey -k k1 select 1 # F1 = screen 1 bindkey -k k2 select 2 # F2 = screen 2 bindkey -k k3 select 3 # F3 = screen 3 bindkey -k k4 select 4 # F4 = screen 4 bindkey -k k5 select 5 # F5 = screen 5 bindkey -k k6 select 6 # F6 = screen 6 bindkey -k k7 select 7 # F7 = screen 7 bindkey -k k8 select 8 # F8 = screen 8 bindkey -k k9 select 9 # F9 = screen 9 bindkey -k F1 prev # F11 = prev bindkey -k F2 next # F12 = next However, when I start multiple windows in screen and attempt to switch between them via the function keys, all I get is a beep. I have tried various settings for $TERM (e.g. ansi, cygwin, xterm-color, vt100) and they don't really seem to affect anything. I have verified that the terminal app is in fact sending the escape sequence for the function key that I'm expecting and that my bash shell (running inside screen) is receiving it. For example, for F1, it sends the following (hexdump is a perl script I wrote that takes STDIN in binmode and outputs it as a hexadecimal/ascii dump): % hexdump [press F1 and then hit ^D to terminate input] 00000000: 1b4f50 .OP If things were working correctly, I don't think bash should receive the escape sequence because screen should have caught it and turned it into a command. How do I get the function keys to work?

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• Dynmically added row in TableLayout

  - by Balaji

  This is my activity class i want to add one textview to TableRow but i cannot show the textview in TableLayout. Activity import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.LayoutInflater; import android.view.ViewGroup.LayoutParams; import android.widget.TableLayout; import android.widget.TableRow; import android.widget.TextView; import android.widget.LinearLayout; public class TableRunTime extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TableLayout tl = (TableLayout) findViewById(R.id.arcitle_content_table); TextView txt = new TextView(this); TableRow tr = new TableRow(this); txt.setText("Book Name"); txt.setTextColor(Color.WHITE); txt.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); tr.addView(txt); tl.addView(tr, new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); } } This is manifest file any one help how to show textview in TableLayout

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• Bare-metal virtualisation for the desktop

  - by Andrew Taylor

  Hi, Does anyone have any knowledge about bare-metal virtualisation products? I'm interested in building a new desktop machine for home, I've been looking at the Intel Quad Core processors and I'd like to put 8GB of RAM in there, but, it got me thinking about making the most out of the available resources. I thought if I could get a good 64bit machine, put some bare-metal virtualisation on, then have a primary system, I'd also be able to bring up some extra virtualised systems as and when I needed. I know most of the bare metal systems are designed for the server market, but, is there anything out there that works well for a desktop. What are the caveats? I presume I won't be able to make the most out of any video cards I could buy, what about just getting a decent screen resolution, will this be a problem? I run a single 24" screen. What about DVD/CD writing, is this possible? I'd like to re-rip my CD collection, I was hoping the quad 64Bit goodness would help me out with the encoding. I currently use a Mac and couldn't go back to windows so that leaves Linux, I was thinking a primary OS of ubuntu. Does this make a difference? Thanks Andrew

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• Apache local configuration to resolve files correctly

  - by Alex E.

  Hello, I am new at this so bare with me. I have just configured Apache and PHP to work on my local Mac OS X computer. Now PHP works fine, except when I try to load the files for my live sites. The live sites have separate directories and are sorted by client name etc. I've created symlinks in the default root for the local web server documents. My issue is that Apache doesn't seem to want to load any of the relative paths that are found in the HTML pages. For example, I have src="/css/main.css" but Apache doesn't load the file, similarly for images, it just resolves as a file not found 404 error. I then thought it might be the symlinks so I copied the full directory into the Apache document root, and still had the same result. I would really love to setup my local development environment to run Apache, PHP, MySQL to develop locally then publish when ready. I also tried the MAMP installation, and had the same issues. Any help at all in this would be greatly appreciated. If my explanation wasn't clear please let me know. Thanks! Alex.

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• What is the proper way to align UITableViewCells when only some have an imageView?

  - by Topher Fangio

  Hello all, I am new to iPhone programming and working on my first real application (i.e. one not written in a book or online) and I've run into a small problem which I could solve a multitude of ways, but feel like there should be a good solution that perhaps I am just missing. Here is the scenario: I have a UITableView with a bunch of standard UITableViewCells in it. What I want to do is toggle a green check mark when the cell is selected and I have that part working (note: I'm already using the accessoryType for something else, so I can't use it for the checkmark...besides, it's not as pretty). Unfortunately, when I toggle the checkmark like so: if (...) { cell.imageView.image = [UIImage imageNamed:@"checkmark.png"]; } else { cell.imageView.image = nil; } It makes the cell's label bounce back and forth depending on whether it is checked or not. What is the proper way to align the cell's text (set via cell.textLabel.text) regardless of whether or not it has an image set? The solutions I have come up with are: Create a blank 40x40 png image in Photoshop and set the unchecked to that Create a blank 40x40 image solely in code Set some setting that I don't know about that will align it for me Create a subclass of UITableCellView that does what I need (which would be stupid, I'd just go with option 1...) Suggestions? Thoughts? Comments? Thank you very much :-) P.S. I'd like the solution to work with OS 3.0 and 4.0 if that makes any sort of difference.

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