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• 10.6.4 Apple Wiki: New just created users can do nothing?

  - by beefon

  Hello, After update to 10.6.4 there's an issue: any new users that I create in Server Prefs/WGM can't post to their blogs, comment, create wiki pages... They can't do anything! There's log from Wiki errors (when user DURAK tries to create new blog entry): [HTTPChannel,5,127.0.0.1] Traceback (most recent call last): [HTTPChannel,5,127.0.0.1] File "/usr/share/caldavd/lib/python/twisted/web/server.py", line 126, in process self.render(resrc) [HTTPChannel,5,127.0.0.1] File "/usr/share/caldavd/lib/python/twisted/web/server.py", line 133, in render body = resrc.render(self) [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_xmlrpc_server/WebAppServer.py", line 90, in render d = defer.maybeDeferred(function, *args) [HTTPChannel,5,127.0.0.1] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 104, in maybeDeferred result = f(*args, **kw) [HTTPChannel,5,127.0.0.1] --- <exception caught here> --- [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_xmlrpc_server/ContentServiceBase.py", line 121, in xmlrpc_addEntry aPage = ContentEntry.newBundleBasedContentEntry (path = path, content = content, author = author, title = title, uid = uid, type = kind, versioned = self.versioned, templateName = template) [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_wlt/ContentEntry.py", line 794, in newBundleBasedContentEntry aPage.save('First created', 'created') [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_wlt/ContentEntry.py", line 445, in save revisions.addRevision(self.serializeEntry(revisionAttributes), inComment = comment, inAuthor = updateAuthor, inChangeType = editType) [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_utilities/sqlitersion.py", line 36, in _func result = f(self, *args, **kwargs) [HTTPChannel,5,127.0.0.1] File "/usr/share/wikid/lib/python/apple_utilities/sqlitersion.py", line 49, in addRevision contentPlistStr = plistlib.writePlistToString(inContentDict).decode("utf-8") [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 110, in writePlistToString [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 94, in writePlist [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 251, in writeValue [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 280, in writeDict [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 238, in writeValue [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 171, in simpleElement [HTTPChannel,5,127.0.0.1] File "/S-m/Lib-ry/Fr-ks/Python.fr-k/Ver-s/2.6/lib/pyth-2.6/plistlib.py", line 221, in _escapeAndEncode [HTTPChannel,5,127.0.0.1] exceptions.UnicodeDecodeError: 'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128) [HTTPChannel,5,127.0.0.1] 'Unparseable html in page, removing whatever was already written.' [HTTPChannel,5,127.0.0.1] Removing /Library/Collaboration/Users/durak/weblog/27133.page Any "old" user CAN create, modify, comment, etc. What can you recommend to fix this issue? Hope for your help...

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• IBM Extends Database Leadership, Delivers Most Advanced Software For Increased Manageability ...

  IBM yesterday announced the general availability of DB2 Universal Database version 8 software on Linux, Unix and Windows. Over 438 new features, including enhanced 'data federation' Web service capabilities, self-configuring and self-managing capabilities, and advanced performance capabilities.

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• Gosu ruby windows no allocator for Image [on hold]

  - by user2812818

  I am trying to run the Gosu tutorial on Windows XP for ruby 1.93 It quits with `new': allocator undefined for Gosu::Image (TypeError) when trying to initialize a new Image: require 'gosu' require 'rubygems' class GameWindow < Gosu::Window def initialize super(640, 480, false) self.caption = "Gosu Tutorial Game" @background_image = Gosu::Image.new(self, "/media/123.bmp", true) end end I made sure the image is there and is png/bmp. I know it is something simple, maybe to do with the DLL's required? just not sure what.... thanks sgv

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• Inherit one instance variable from the global scope

  - by Julian

  I'm using Curses to create a command line GUI with Ruby. Everything's going well, but I have hit a slight snag. I don't think Curses knowledge (esoteric to be fair) is required to answer this question, just Ruby concepts such as objects and inheritance. I'm going to explain my problem now, but if I'm banging on, just look at the example below. Basically, every Window instance needs to have .close called on it in order to close it. Some Window instances have other Windows associated with it. When closing a Window instance, I want to be able to close all of the other Window instances associated with it at the same time. Because associated Windows are generated in a logical fashion, (I append the name with a number: instance_variable_set(self + integer, Window.new(10,10,10,10)) ), it's easy to target generated windows, because methods can anticipate what assosiated windows will be called, (I can recreate the instance variable name from scratch, and almost query it: instance_variable_get(self + integer). I have a delete method that handles this. If the delete method is just a normal, global method (called like this: delete_window(@win543) then everything works perfectly. However, if the delete method is an instance method, which it needs to be in-order to use the self keyword, it doesn't work for a very clear reason; it can 'query' the correct instance variable perfectly well (instance_variable_get(self + integer)), however, because it's an instance method, the global instances aren't scoped to it! Now, one way around this would obviously be to simply make a global method like this: delete_window(@win543). But I have attributes associated with my window instances, and it all works very elegantly. This is very simplified, but it literally translates the problem exactly: class Dog def speak woof end end def woof if @dog_generic == nil puts "@dog_generic isn't scoped when .woof is called from a class method!\n" else puts "@dog_generic is scoped when .woof is called from the global scope. See:\n" + @dog_generic end end @dog_generic = "Woof!" lassie = Dog.new lassie.speak #=> @dog_generic isn't scoped when .woof is called from an instance method!\n woof #=> @dog_generic is scoped when .woof is called from the global scope. See:\nWoof! TL/DR: I need lassie.speak to return this string: "@dog_generic is scoped when .woof is called from the global scope. See:\nWoof!" @dog_generic must remain as an insance variable. The use of Globals or Constants is not acceptable. Could woof inherit from the Global scope? Maybe some sort of keyword: def woof < global # This 'code' is just to conceptualise what I want to do, don't take offence! end Is there some way the .woof method could 'pull in' @dog_generic from the global scope? Will @dog_generic have to be passed in as a parameter?

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• How to control gnome-terminal from Python scrypt?

  - by user936401

  I am developing an application in PyGtk, and would like to launch a gnome-terminal and output commands to it. My user should then be able to modify the command, or maybe ignore using the up arrow ... etc. I have been able to launch a terminal, but can't work out how to send commands. This is how my application starts: class App(Gtk.Window): def __init__(self): Gtk.Window.__init__(self) process=subprocess.Popen(["gnome-terminal", "--class=App", "--name=app"], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE) response,error=process.communicate()

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• Quickly Warning

  - by bradjones

  Every time I run my application I receive these warning errors can anyone tell me what is causing them? $ quickly run /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `AppWindow' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds)

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• Help yourself . if you like

  - by rachelp

  At Red Gate we enjoy talking to our customers. Really! If you've read recent blog posts by members of some of our customer-facing teams, you'll have spotted the pleasure they take in their work. In case you missed those posts, here they are: From our Finance team: Finance: Friends, not foes! From our reception desk: The Front line of Communication However, we recognise that sometimes our customers would like to be able to solve their problems or answer their questions without talking to us - they're in a hurry, it's outside office hours . or perhaps they just prefer not to pick up the phone and call.   Self-service customer care So we've begun a programme of work to enable more self-service; whether it's finding the answer to a "how do i.?" question or getting access to a record of what product licenses they own, we want to make it much easier for our customers to get hold of this information for themselves. If they want to.   Phase 1: make it easier to find information We decided to start by tackling findability. We've got loads of useful information on our website, but it's sometimes difficult to find, so we've been working on improving our site search. Step 1 has been to replace the search engine, clean up the search UI, and make it consistent across the site. We're nearly there! The idea is that if we improve the site search it will be easier - and much more pleasant - for people to find the information they need. The new search will go live some time in April, and then we'll be gathering feedback, looking at web analytics (more about this in an earlier article), and working out what improvements we still need to make. We'd love to hear what you think, so do give your feedback or drop us a line. Or pick up the phone and call, if you like.   What do you think? While I've got your attention, I'd love to hear what people think about self-service customer care. Do you like to call, email, live chat . or do you prefer to dig around and find out answers yourself? Who's getting it right: what self-service sites do you like? p.s. Watch this space for news of phase 2.

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• Colliding Rects [migrated]

  - by user73400

  I have been working on this game, but I have a question when it comes to collision detection. Can I check for collision and have it return True: example: def collide(self, EnemyTank): tank_collision = pygame.sprite.collide_rect(self.rect, EnemyTank.rect) if tank_collision == True: return True And then make it perform an action like this: if player.collide == True: e_tank_x += 0 I am new to programming so please bear with me, I am trying as hard as I can and any comments or suggestions would also be very appreciated.

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• Gluster bricks are offline and errors in logs

  - by Roman Newaza

  I have substituted all the IP addresses with hostnames and renamed configs (IP to hostname) in /var/lib/glusterd by my shell script. After that I restarted Gluster Daemon and the volume. Then I checked if all the peers are connected: root@GlusterNode1a:~# gluster peer status Number of Peers: 3 Hostname: gluster-1b Uuid: 47f469e2-907a-4518-b6a4-f44878761fd2 State: Peer in Cluster (Connected) Hostname: gluster-2b Uuid: dc3a3ff7-9e30-44ac-9d15-00f9dab4d8b9 State: Peer in Cluster (Connected) Hostname: gluster-2a Uuid: 72405811-15a0-456b-86bb-1589058ff89b State: Peer in Cluster (Connected) I could see mounted volumes size change on all the nodes when I execute df command, so new data is coming. But recently I noticed error messages in app log: copy(/storage/152627/dat): failed to open stream: Structure needs cleaning readfile(/storage/1438227/dat): failed to open stream: Input/output error unlink(/storage/189457/23/dat): No such file or directory Finally, I have found out some bricks are offline: root@GlusterNode1a:~# gluster volume status Status of volume: storage Gluster process Port Online Pid ------------------------------------------------------------------------------ Brick gluster-1a:/storage/1a 24009 Y 1326 Brick gluster-1b:/storage/1b 24009 N N/A Brick gluster-2a:/storage/2a 24009 N N/A Brick gluster-2b:/storage/2b 24009 N N/A Brick gluster-1a:/storage/3a 24011 Y 1332 Brick gluster-1b:/storage/3b 24011 N N/A Brick gluster-2a:/storage/4a 24011 N N/A Brick gluster-2b:/storage/4b 24011 N N/A NFS Server on localhost 38467 Y 24670 Self-heal Daemon on localhost N/A Y 24676 NFS Server on gluster-2b 38467 Y 4339 Self-heal Daemon on gluster-2b N/A Y 4345 NFS Server on gluster-2a 38467 Y 1392 Self-heal Daemon on gluster-2a N/A Y 1402 NFS Server on gluster-1b 38467 Y 2435 Self-heal Daemon on gluster-1b N/A Y 2441 What can I do about that? I need to fix it. Note: CPU and Network usage of all the four nodes are about the same.

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• LDAP ACLs with ldapmodify & .ldif file grand user access only

  - by plaetzchen

  I want to change the settings my new LDAP server let only users of the server read entries and not anonymous. Currently my olcAccess looks like this: olcAccess: {0} to attrs=userPassword,shadowLastChange by self write by anonymous auth by dn="cn=admin,dc=example,dc=com" write by * none olcAccess: {1} to * by self write by dn="cn=admin,dc=example,dc=com" write by * read I tried to change it like so: olcAccess: {0}to attrs=userPassword,shadowLastChange by self write by anonymous auth by dn="cn=admin,dc=example,dc=com" write by * none olcAccess: {1} to * by self write by dn="cn=admin,dc=exampme,dc=com" write by users read But that gives me no access at all. Can someone help me on this? thanks UPDATE: This is the log read after the changes mentioned by userxxx Sep 30 10:47:21 j16354 slapd[11805]: conn=1437 fd=28 ACCEPT from IP=87.149.169.6:64121 (IP=0.0.0.0:389) Sep 30 10:47:21 j16354 slapd[11805]: conn=1437 op=0 do_bind: invalid dn (pbrechler) Sep 30 10:47:21 j16354 slapd[11805]: conn=1437 op=0 RESULT tag=97 err=34 text=invalid DN Sep 30 10:47:21 j16354 slapd[11805]: conn=1437 op=1 UNBIND Sep 30 10:47:21 j16354 slapd[11805]: conn=1437 fd=28 closed Sep 30 10:47:21 j16354 slapd[11805]: conn=1438 fd=28 ACCEPT from IP=87.149.169.6:64122 (IP=0.0.0.0:389) Sep 30 10:47:21 j16354 slapd[11805]: conn=1438 op=0 do_bind: invalid dn (pbrechler) Sep 30 10:47:21 j16354 slapd[11805]: conn=1438 op=0 RESULT tag=97 err=34 text=invalid DN Sep 30 10:47:21 j16354 slapd[11805]: conn=1438 op=1 UNBIND Sep 30 10:47:21 j16354 slapd[11805]: conn=1438 fd=28 closed pbrechler should be a valid user but has no system user (we don't need it) admin does't work also List item

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• Logical Domain Modeling Made Simple

  - by Knut Vatsendvik

  How can logical domain modeling be made simple and collaborative? Many non-technical end-users, managers and business domain experts find it difficult to understand the visual models offered by many UML tools. This creates trouble in capturing and verifying the information that goes into a logical domain model. The tools are also too advanced and complex for a non-technical user to learn and use. We have therefore, in our current project, ended up with using Confluence as tool for designing the logical domain model with the help of a few very useful plugins. Big thanks to Ole Nymoen and Per Spilling for their expertise in this field that made this posting possible. Confluence Plugins Here is a list of Confluence plugins used in this solution. Install these before trying out the macros used below. Plugin Description Copy Space Allows a space administrator to copy a space, including the pages within the space Metadata Supports adding metadata to Wiki pages Label Manages labeling of pages Linking Contains macros for linking to templates, the dashboard and other Table Enhances the table capability in Confluence Creating a Confluence Space First we need to create a new confluence space for the domain model. Click the link Create a Space located below the list of spaces on the Dashboard. Please contact your Confluence administrator is you do not have permissions to do this.   For illustrative purpose all attributes and entities in this posting are based on my imaginary project manager domain model. When a logical domain model is good enough for being implemented, do a copy of the Confluence Space (see Copy Space plugin). In this way you create a stable version of the logical domain model while further design can continue with the new copied space. Typical will the implementation phase result in a database design and/or a XSD schema design. Add Space Templates Go to the Home page of your Confluence Space. Navigate to the Browse drop-down menu and click on Advanced. Then click the Templates option in the left navigation panel. Click Add New Space Template to add the following three templates. Name: attribute {metadata-list} || Name | | || Type | | || Format | | || Description | | {metadata-list} {add-label:attribute} Name: primary-type {metadata-list} || Name | || || Type | || || Format | || || Description | || {metadata-list} {add-label:primary-type} Name: complex-type {metadata-list} || Name | || || Description |  || {metadata-list} h3. Attributes || Name || Type || Format || Description || | [name] | {metadata-from:name|Type} | {metadata-from:name|Format} | {metadata-from:name|Description} | {add-label:complex-type,entity} The metadata-list macro (see Metadata plugin) will save a list of metadata values to the page. The add-label macro (see Label plugin) will automatically label the page. Primary Types Page Our first page to add will act as container for our primary types. Switch to Wiki markup when adding the following content to the page. | (+) {add-page:template=primary-type|parent=@self}Add new primary type{add-page} | {metadata-report:Name,Type,Format,Description|sort=Name|root=@self|pages=@descendents} Once the page is created, click the Add new primary type (create-page macro) to start creating a new pages. Here is an example of input to the LocalDate page. Embrace the LocalDate with square brackets [] to make the page linkable. Again switch to Wiki markup before editing. {metadata-list} || Name | [LocalDate] || || Type | Date || || Format | YYYY-MM-DD || || Description | Date in local time zone. YYYY = year, MM = month and DD = day || {metadata-list} {add-label:primary-type} The metadata-report macro will show a tabular report of all child pages.   Attributes Page The next page will act as container for all of our attributes. | (+) {add-page:template=attribute|parent=@self|title=attribute}Add new attribute{add-page} | {metadata-report:Name,Type,Format,Description|sort=Name|pages=@descendants} Here is an example of input to the startDate page. {metadata-list} || Name | [startDate] || || Type | [LocalDate] || || Format | {metadata-from:LocalDate|Format} || || Description | The projects start date || {metadata-list} {add-label:attribute} Using the metadata-from macro we fetch the text from the previously created LocalDate page. Complex Types Page The last page in this example shows how attributes can be combined together to form more complex types.   h3. Intro Overview of complex types in the domain model. | (+) {add-page:template=complex-type|parent=@self}Add a new complex type{add-page}\\ | {metadata-report:Name,Description|sort=Name|root=@self|pages=@descendents} Here is an example of input to the ProjectType page. {metadata-list} || Name | [ProjectType] || || Description | Represents a project || {metadata-list} h3. Attributes || Name || Type || Format || Description || | [projectId] | {metadata-from:projectId|Type} | {metadata-from:projectId|Format} | {metadata-from:projectId|Description} | | [name] | {metadata-from:name|Type} | {metadata-from:name|Format} | {metadata-from:name|Description} | | [description] | {metadata-from:description|Type} | {metadata-from:description|Format} | {metadata-from:description|Description} | | [startDate] | {metadata-from:startDate|Type} | {metadata-from:startDate|Format} | {metadata-from:startDate|Description} | {add-label:complex-type,entity} Gives us this Conclusion Using a web-based corporate Wiki like Confluence to create a logical domain model increases the collaboration between people with different roles in the enterprise. It’s my believe that this helps the domain model to be more accurate, and better documented. In our real project we have more pages than illustrated here to complete the documentation. We do also still use UML tools to create different types of diagrams that Confluence do not support. As a last tip, an ImageMap plugin can make those diagrams clickable when used in pages. Enjoy!

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• Oracle Delivers Latest Release of Oracle Enterprise Manager 12c

  - by Scott McNeil

  Richer Service Catalog for Database and Middleware as a Service; Enhanced Database and Middleware Management Help Drive Enterprise-Scale Private Cloud Adoption News Summary IT organizations are adopting private clouds as a stepping-stone to business-driven, self-service IT. Successful implementations hinge on the ability to efficiently deploy and manage cloud services at enterprise scale. Having a complete cloud management solution integrated with an enterprise-class technology stack is a fundamental requirement for IT. Oracle Enterprise Manager 12c Release 4 meets that requirement by helping businesses become more agile and responsive, while reducing cost, complexity, and risk. News Facts Oracle Enterprise Manager 12c Release 4, available today, lets organizations rapidly adopt Oracle-based, enterprise-scale private clouds. New capabilities provide advanced technology stack management, secure database administration, and enterprise service governance, enabling Oracle customers and partners to maximize database and application performance and drive innovation using self-service IT platforms. The enhancements have been driven by customers and the growing Oracle Enterprise Manager Ecosystem, comprised of more than 750 Oracle PartnerNetwork (OPN) Specialized partners. Oracle and its partners and customers have built over 140 plug-ins and connectors for Oracle Enterprise Manager. Watch the video highlights. Automation for Broader Cloud Services Oracle Enterprise Manager 12c Release 4 allows for a rapid enterprise-wide adoption of database, middleware and infrastructure services in the private cloud, driven by an enhanced API-enabled service catalog. The release features “push button” style provisioning of complete environments such as SOA and Oracle Active Data Guard, and fast data cloning that enables rapid deployment and testing of enterprise applications. Out-of-the-box capabilities to detect data and configuration vulnerabilities provide enhanced cloud service governance along with greater operational control through a flexible and extensible showback mechanism. Enhanced Database Management A new performance warehouse enables predictive database diagnostics and trend analysis and helps identify database problems before they occur. New enterprise data-governance capabilities enhance security by helping systematically discover and protect sensitive data. Step-by-step orchestration of upgrades with the ability to rollback changes enables faster adoption of Oracle Database 12c. Expanded Fusion Middleware Management A new consolidated view of Oracle Fusion Middleware 12c deployments with a guided management capability lets administrators apply best management practices to diverse middleware environments and identify performance issues quickly. A Java VM Diagnostics as a Service feature allows governed access to diagnostics data for IT workers across multiple disciplines for accelerated DevOps resolutions of defects and performance optimization. New automated provisioning for SOA lets middleware administrators perform mass SOA provisioning with ease. Superior Enterprise-Grade Management Private roles and preferred credentials have been added to Oracle Enterprise Manager to provide additional fine-grained security for organizations with complex access control requirements. A new security console provides a single point of control for managing the security of Oracle Enterprise Manager environments. Support for the latest industry standard SNMP v3 protocol, including encryption, enables more secure heterogeneous management. “Smart monitoring” adapts to observed environmental changes and adds self-management capabilities to help Oracle Enterprise Manager run at peak performance, while demanding less IT supervision. Supporting Quotes “Lawrence Livermore National Laboratory has a strong tradition of technology breakthroughs and leadership. As a member of Oracle’s Customer Advisory Board for Oracle Enterprise Manager, we have consistently provided feedback and guidance in the areas of enterprise-scale cloud, self-diagnosability, and secure administration for the product,” said Tim Frazier, CIO, NIF and Photon Sciences, Lawrence Livermore National Laboratory. “We intend to take advantage of the Release 4 features that support enterprise-scale availability and fine-grained security capabilities for private cloud deployments.” “IDC's most recent CloudTrack survey shows that most enterprises plan to adopt hybrid cloud architectures over the next three years,” said Mary Johnston Turner, Research Vice President, Enterprise System Management Software, IDC. “These organizations plan to deploy a wide range of workloads into cloud environments including mission critical database and middleware services that require high levels of fault tolerance and disaster recovery. Such capabilities were traditionally custom configured for each application but cloud offers the possibility to incorporate such properties within the service definition, enabling organizations to adopt cloud without compromise. With the latest release of Oracle Enterprise Manager 12c, Oracle is providing customers with an out-of-the-box experience for delivering highly-resilient cloud services for databases and applications.” “Since its inception, Oracle has been leading the way in innovative, scalable and high performance solutions for the enterprise. With this release of Oracle Enterprise Manager, we are extending this leadership by providing enterprise-scale capabilities for planning, delivering, and managing private clouds. We call this ‘zero-to-cloud – accelerated.’ These enhancements help our customers to expedite their adoption of cloud computing and prepares them for the next generation of self-service IT,” said Prakash Ramamurthy, senior vice president of Systems and Cloud Management at Oracle. Supporting Resources Oracle Enterprise Manager 12c Video: Cerner Delivers High Performance Private Cloud Video: BIAS Achieves Outstanding Results with Private Cloud Press Release Stay Connected: Twitter | Facebook | YouTube | Linkedin | Newsletter Download the Oracle Enterprise Manager 12c Mobile app

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• Cocos2d: Moving background on update: offsett issue

  - by mm24

  working with Objective C, iOS and Cocos2d I am developing a vertical scrolling shooter game for iPhone (retina display models with 640 width x 960 height pixel resolution). My basic algorithm works as following: I create two instances of an image that has exactly 640 width x 960 height pixel of resolution, which we will call imageA and imageB I then set the two imags with exactly 480.0f of offset from each other, as the screenSize of a CCScene is set by default to 480.0f. At each update method call I move the two images by the same value. I make sure that their offsett stays to 480.0f However when running the game I see a 1 pixel height line between the two images. This literally bugs me and would like to adjust this. What am I doing wrong? This is a zoom in on the background when the "offsett line" is visible. The white line you can see divides the two background images and is not meant to exist as both images are completely black :): If I change the yPositionOfSecondElement value to 479.0f until the first loop the two images overlap correctly, but as soon as the loop starts the two images starts having an offsett of -1.0f. Here is the initialization code: -(void) init { //... screenHeight = 480.0f; yPositionOfSecondElement= screenHeight;//I tried subtracting an offsett of -1 but eventually the image would go wrong again yPositionOfFirstElement = 0.0f; loopedBackgroundImageInstanceA = [BackgroundLoopedImage loopImageForLevel:levelName]; loopedBackgroundImageInstanceA.anchorPoint = CGPointMake(0.5f, 0.0f); loopedBackgroundImageInstanceA.position = CGPointMake(160.0f, yPositionOfFirstElement); [node addChild:loopedBackgroundImageInstanceA z:zLevelBackground]; //loopedBackgroundImageInstanceA.color= ccRED; loopedBackgroundImageInstanceB = [BackgroundLoopedImage loopImageForLevel:levelName]; loopedBackgroundImageInstanceB.anchorPoint = CGPointMake(0.5f, 0.0f); loopedBackgroundImageInstanceB.position = CGPointMake(160.0f, yPositionOfSecondElement); [node addChild:loopedBackgroundImageInstanceB z:zLevelBackground]; //.... } And here is the move code called at each update: -(void) moveBackgroundSprites:(BackgroundLoopedImage*)imageA :(BackgroundLoopedImage*)imageB :(ccTime)delta { isEligibleToMove=false; //This is done to avoid rounding errors float yStep = delta * [GameController sharedGameController].currentBackgroundSpeed; NSString* formattedNumber = [NSString stringWithFormat:@"%.02f", yStep]; yStep = atof([formattedNumber UTF8String]); //First should adjust position of images [self adjustPosition:imageA :imageB]; //The can get the actual image position CGPoint posA = imageA.position; CGPoint posB = imageB.position; //Here could verify if the checksum is equal to the required difference (should be 479.0f) if (![self verifyCheckSum:posA :posB]) { CCLOG(@"does not comply A"); } //At this stage can compute the hypotetical new position CGPoint newPosA = CGPointMake(posA.x, posA.y - yStep); CGPoint newPosB = CGPointMake(posB.x, posB.y - yStep); // Reposition stripes when they're out of bounds if (newPosA.y <= -yPositionOfSecondElement) { newPosA.y = yPositionOfSecondElement; [imageA shuffle]; if (timeElapsed>=endTime && hasReachedEndLevel==FALSE) { hasReachedEndLevel=TRUE; shouldMoveImageEnd=TRUE; } } else if (newPosB.y <= -yPositionOfSecondElement) { newPosB.y = yPositionOfSecondElement; [imageB shuffle]; if (timeElapsed>=endTime && hasReachedEndLevel==FALSE) { hasReachedEndLevel=TRUE; shouldMoveImageEnd=TRUE; } } //Here should verify that the check sum is equal to 479.0f if (![self verifyCheckSum:posA :posB]) { CCLOG(@"does not comply B"); } imageA.position = newPosA; imageB.position = newPosB; //Here could verify that the check sum is equal to 479.0f if (![self verifyCheckSum:posA :posB]) { CCLOG(@"does not comply C"); } isEligibleToMove=true; } -(BOOL) verifyCheckSum:(CGPoint)posA :(CGPoint)posB { BOOL comply = false; float sum = 0.0f; if (posA.y > posB.y) { sum = posA.y - posB.y; } else if (posB.y > posA.y){ sum = posB.y - posA.y; } else{ return false; } if (sum!=yPositionOfSecondElement) { comply= false; } else{ comply=true; } return comply; } And here is what happens on the update: if(shouldMoveImageA && shouldMoveImageB) { if (isEligibleToMove) { [self moveBackgroundSprites:loopedBackgroundImageInstanceA :loopedBackgroundImageInstanceB :delta]; } Forget about shouldMoveImageA and shouldMoveImageB, this is just for when the background reaches the end of level, this works.

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• Iphone SDK - adding UITableView to UIView

  - by Shashi

  Hi, I am trying to learn how to use different views, for this sample test app, i have a login page, upon successful logon, the user is redirected to a table view and then upon selection of an item in the table view, the user is directed to a third page showing details of the item. the first page works just fine, but the problem occurs when i go to the second page, the table shown doesn't have title and i cannot add title or toolbar or anything other than the content of the tables themselves. and when i click on the item, needless to say nothing happens. no errors as well. i am fairly new to programming and have always worked on Java but never on C(although i have some basic knowledge of C) and Objective C is new to me. Here is the code. import @interface NavigationTestAppDelegate : NSObject { UIWindow *window; UIViewController *viewController; IBOutlet UITextField *username; IBOutlet UITextField *password; IBOutlet UILabel *loginError; //UINavigationController *navigationController; } @property (nonatomic, retain) IBOutlet UIViewController *viewController; @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UITextField *username; @property (nonatomic, retain) IBOutlet UITextField *password; @property (nonatomic, retain) IBOutlet UILabel *loginError; -(IBAction) login; -(IBAction) hideKeyboard: (id) sender; @end import "NavigationTestAppDelegate.h" import "RootViewController.h" @implementation NavigationTestAppDelegate @synthesize window; @synthesize viewController; @synthesize username; @synthesize password; @synthesize loginError; pragma mark - pragma mark Application lifecycle -(IBAction) hideKeyboard: (id) sender{ [sender resignFirstResponder]; } (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after app launch //RootViewController *rootViewController = [[RootViewController alloc] init]; //[window addSubview:[navigationController view]]; [window addSubview:[viewController view]]; [window makeKeyAndVisible]; return YES; } -(IBAction) login { RootViewController *rootViewController = [[RootViewController alloc] init]; //NSString *user = [[NSString alloc] username. if([username.text isEqualToString:@"test"]&&[password.text isEqualToString:@"test"]){ [window addSubview:[rootViewController view]]; //[window addSubview:[navigationController view]]; [window makeKeyAndVisible]; //rootViewController.awakeFromNib; } else { loginError.text = @"LOGIN ERROR"; [window addSubview:[viewController view]]; [window makeKeyAndVisible]; } } (void)applicationWillTerminate:(UIApplication *)application { // Save data if appropriate } pragma mark - pragma mark Memory management (void)dealloc { //[navigationController release]; [viewController release]; [window release]; [super dealloc]; } @end import @interface RootViewController : UITableViewController { IBOutlet NSMutableArray *views; } @property (nonatomic, retain) IBOutlet NSMutableArray * views; @end // // RootViewController.m // NavigationTest // // Created by guest on 4/23/10. // Copyright MyCompanyName 2010. All rights reserved. // import "RootViewController.h" import "OpportunityOne.h" @implementation RootViewController @synthesize views; //@synthesize navigationViewController; pragma mark - pragma mark View lifecycle (void)viewDidLoad { views = [ [NSMutableArray alloc] init]; OpportunityOne *opportunityOneController; for (int i=1; i<=20; i++) { opportunityOneController = [[OpportunityOne alloc] init]; opportunityOneController.title = [[NSString alloc] initWithFormat:@"Opportunity %i",i]; [views addObject:[NSDictionary dictionaryWithObjectsAndKeys: [[NSString alloc] initWithFormat:@"Opportunity %i",i], @ "title", opportunityOneController, @"controller", nil]]; self.title=@"GPS"; } /*UIBarButtonItem *temporaryBarButtonItem = [[UIBarButtonItem alloc] init]; temporaryBarButtonItem.title = @"Back"; self.navigationItem.backBarButtonItem = temporaryBarButtonItem; [temporaryBarButtonItem release]; */ //self.title =@"Global Platform for Sales"; [super viewDidLoad]; //[temporaryBarButtonItem release]; //[opportunityOneController release]; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. // self.navigationItem.rightBarButtonItem = self.editButtonItem; } pragma mark - pragma mark Table view data source // Customize the number of sections in the table view. - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } // Customize the number of rows in the table view. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [views count]; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. cell.textLabel.text = [[views objectAtIndex:indexPath.row] objectForKey:@"title"]; return cell; } pragma mark - pragma mark Table view delegate (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { //UIViewController *targetViewController = [[views objectAtIndex:indexPath.row] objectForKey:@"controller"]; UIViewController *targetViewController = [[views objectAtIndex:indexPath.row] objectForKey:@"controller"]; [[self navigationController] pushViewController:targetViewController animated:YES]; } pragma mark - pragma mark Memory management (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Relinquish ownership any cached data, images, etc that aren't in use. } (void)viewDidUnload { // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand. // For example: self.myOutlet = nil; } (void)dealloc { [views release]; [super dealloc]; } @end Wow, i was finding it real hard to post the code. i apologize for the bad formatting, but i just couldn't get past the formatting rules for this text editor. Thanks, Shashi

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• PHP MVC Framework Structure

  - by bigstylee

  I am sorry about the amount of code here. I have tried to show enough for understanding while avoiding confusion (I hope). I have included a second copy of the code at Pastebin. (The code does execute without error/notice/warning.) I am currently creating a Content Management System while trying to implement the idea of Model View Controller. I have only recently come across the concept of MVC (within the last week) and trying to implement this into my current project. One of the features of the CMS is dynamic/customisable menu areas and each feature will be represented by a controller. Therefore there will be multiple versions of the Controller Class, each with specific extended functionality. I have looked at a number of tutorials and read some open source solutions to the MVC Framework. I am now trying to create a lightweight solution for my specific requirements. I am not interested in backwards compatibility, I am using PHP 5.3. An advantage of the Base class is not having to use global and can directly access any loaded class using $this->Obj['ClassName']->property/function();. Hoping to get some feedback using the basic structure outlined (with performance in mind). Specifically; a) Have I understood/implemented the concept of MVC correctly? b) Have I understood/implemented Object Orientated techniques with PHP 5 correctly? c) Should the class propertise of Base be static? d) Improvements? Thank you very much in advance! <?php /* A "Super Class" that creates/stores all object instances */ class Base { public static $Obj = array(); // Not sure this is the correct use of the "static" keyword? public static $var; static public function load_class($directory, $class) { echo count(self::$Obj)."\n"; // This does show the array is getting updated and not creating a new array :) if (!isset(self::$Obj[$class]) && !is_object(self::$Obj[$class])) //dont want to load it twice { /* Locate and include the class file based upon name ($class) */ return self::$Obj[$class] = new $class(); } return TRUE; } } /* Loads general configuration objects into the "Super Class" */ class Libraries extends Base { public function __construct(){ $this->load_class('library', 'Database'); $this->load_class('library', 'Session'); self::$var = 'Hello World!'; //testing visibility /* Other general funciton classes */ } } class Database extends Base { /* Connects to the the database and executes all queries */ public function query(){} } class Session extends Base { /* Implements Sessions in database (read/write) */ } /* General functionality of controllers */ abstract class Controller extends Base { protected function load_model($class, $method) { /* Locate and include the model file */ $this->load_class('model', $class); call_user_func(array(self::$Obj[$class], $method)); } protected function load_view($name) { /* Locate and include the view file */ #include('views/'.$name.'.php'); } } abstract class View extends Base { /* ... */ } abstract class Model extends Base { /* ... */ } class News extends Controller { public function index() { /* Displays the 5 most recent News articles and displays with Content Area */ $this->load_model('NewsModel', 'index'); $this->load_view('news', 'index'); echo $this->var; } public function menu() { /* Displays the News Title of the 5 most recent News articles and displays within the Menu Area */ $this->load_model('news/index'); $this->load_view('news/index'); } } class ChatBox extends Controller { /* ... */ } /* Lots of different features extending the controller/view/model class depending upon request and layout */ class NewsModel extends Model { public function index() { echo $this->var; self::$Obj['Database']->query(/*SELECT 5 most recent news articles*/); } public function menu() { /* ... */ } } $Libraries = new Libraries; $controller = 'News'; // Would be determined from Query String $method = 'index'; // Would be determined from Query String $Content = $Libraries->load_class('controller', $controller); //create the controller for the specific page if (in_array($method, get_class_methods($Content))) { call_user_func(array($Content, $method)); } else { die('Bad Request'. $method); } $Content::$var = 'Goodbye World'; echo $Libraries::$var . ' - ' . $Content::$var; ?> /* Ouput */ 0 1 2 3 Goodbye World! - Goodbye World

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• My application crashing Please help me out.

  - by kiran kumar

  My Application get crashing ... its loading data of all the cities... and when i click its displaying my detailed view controller.... when iam getting back from my controller... and selecting another city my application get crashed.. Please help me out. To get idea i am pasting my code. #import "CityNameViewController.h" #import "Cities.h" #import "XMLParser.h" #import "PartyTemperature_AppDelegate.h" #import "CityEventViewController.h" @implementation CityNameViewController //@synthesize aCities; @synthesize appDelegate; @synthesize currentIndex; @synthesize aCities; /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) { // Custom initialization } return self; } */ // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; self.title=@"Cities"; appDelegate=(PartyTemperature_AppDelegate *)[[UIApplication sharedApplication]delegate]; } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [appDelegate.cityListArray count]; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 95.0f; } - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; cell.textLabel.textColor = [[[UIColor alloc] initWithRed:0.2 green:0.2 blue:0.6 alpha:1] autorelease]; cell.detailTextLabel.textColor = [UIColor blackColor]; cell.detailTextLabel.font=[UIFont systemFontOfSize:10]; if (indexPath.row %2 == 1) { cell.backgroundColor = [[[UIColor alloc] initWithRed:0.87f green:0.87f blue:0.87f alpha:1.0f] autorelease]; } else { cell.backgroundColor = [[[UIColor alloc] initWithRed:0.97f green:0.97f blue:0.97f alpha:1.0f] autorelease]; } } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; cell.selectionStyle= UITableViewCellSelectionStyleBlue; // cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; cell.backgroundColor=[UIColor blueColor]; } // aCities=[appDelegate.cityListArray objectAtIndex:indexPath.row]; // cell.textLabel.text=aCities.city_Name; cell.textLabel.text=[[appDelegate.cityListArray objectAtIndex:indexPath.row]city_Name]; return cell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ //http://compliantbox.com/party_temperature/citysearch.php?city=Amsterdam&latitude=52.366125&longitude=4.899171 NSString *url; aCities=[appDelegate.cityListArray objectAtIndex:indexPath.row]; if ([appDelegate.cityListArray count]>0){ url=@"http://compliantbox.com/party_temperature/citysearch.php?city="; url=[url stringByAppendingString:aCities.city_Name]; url=[url stringByAppendingString:@"&latitude=52.366125&longitude=4.899171"]; NSLog(@"url value is %@",url); [self parseCityName:[[NSURL alloc]initWithString:url]]; } } -(void)parseCityName:(NSURL *)url{ NSXMLParser *xmlParser=[[NSXMLParser alloc]initWithContentsOfURL:url]; XMLParser *parser=[[XMLParser alloc] initXMLParser]; [xmlParser setDelegate:parser]; BOOL success; success=[xmlParser parse]; if (success) { NSLog(@"Sucessfully parsed"); CityEventViewController *cityEventViewController=[[CityEventViewController alloc]initWithNibName:@"CityEventViewController" bundle:nil]; cityEventViewController.index=currentIndex; [self.navigationController pushViewController:cityEventViewController animated:YES]; [cityEventViewController release]; cityEventViewController=nil; } else { NSLog(@"Try it Idoit"); UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert!" message:@"Event Not In Radius" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release]; } } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [aCities release]; [super dealloc]; } @end And the error is * Terminating app due to uncaught exception 'NSRangeException', reason: ' -[NSMutableArray objectAtIndex:]: index 1 beyond bounds for empty array' ** Call stack at first throw:

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• Why did cherokee-admin-launcher crash?

  - by DarenW

  I'm trying out the Cherokee http server on a seemingly fine machine. Following simple set-up instructions, I tried running cherokee-admin-launcher but it printed error messages and hung up. Ctrl-C did not kill it; I had to kill -9 it from another xterm. OTOH, cherokee-admin ran fine (or at least got a lot further). What is the problem with python and cherokee-admin-launcher, and how to fix it? [root@iron rc.d]# cherokee-admin-launcher Checking TCP port 9090 availability.. OK Launching: LD_LIBRARY_PATH=/usr/lib /usr/sbin/cherokee-admin Exception in thread Thread-1: Traceback (most recent call last): File "/usr/lib/python2.7/threading.py", line 530, in __bootstrap_inner self.run() File "/usr/bin/cherokee-admin-launcher", line 209, in run return self._run_guts() File "/usr/bin/cherokee-admin-launcher", line 217, in _run_guts env=self.environ, close_fds=True) File "/usr/lib/python2.7/subprocess.py", line 672, in __init__ errread, errwrite) File "/usr/lib/python2.7/subprocess.py", line 1202, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory ^C ^C

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• Ubuntu 10.04 recognizing USB 2.0 external HD as USB 1.1

  - by btucker

  When I connect the USB 2.0 drive I see this: usb 1-4.3: new full speed USB device using ohci_hcd and address 5 so I know it's getting seen as USB 1.1. usb-devices shows that it really is USB 2.0 and connected to a USB 2.0 hub: T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 2 Spd=12 MxCh= 4 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=05e3 ProdID=0608 Rev=77.61 S: Product=USB2.0 Hub C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=13fd ProdID=1340 Rev=02.10 S: Manufacturer=Generic S: Product=External C: #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=2mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage It seems the problem is that root hub is: T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh=10 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1d6b ProdID=0001 Rev=02.06 S: Manufacturer=Linux 2.6.32-25-server ohci_hcd S: Product=OHCI Host Controller S: SerialNumber=0000:00:02.0 C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub And there's no mention of ehci_hcd. lsusb -t gives me: /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ohci_hcd/10p, 12M |__ Port 4: Dev 2, If 0, Class=hub, Driver=hub/4p, 12M |__ Port 2: Dev 4, If 0, Class=stor., Driver=usb-storage, 12M |__ Port 3: Dev 5, If 0, Class=stor., Driver=usb-storage, 12M |__ Port 6: Dev 3, If 0, Class=stor., Driver=usb-storage, 12M It seems like I'm missing something which would allow the OS to see USB 2.0 devices. Can anyone point me in the right direction? EDIT Full lsusb -v output: Bus 001 Device 005: ID 13fd:1340 Initio Corporation Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x13fd Initio Corporation idProduct 0x1340 bcdDevice 2.10 iManufacturer 1 Generic iProduct 2 External iSerial 3 57442D574341595930323337 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 2mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk (Zip) iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0001 Self Powered Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 0 Full speed (or root) hub bMaxPacketSize0 64 idVendor 0x05e3 Genesys Logic, Inc. idProduct 0x0608 USB-2.0 4-Port HUB bcdDevice 77.61 iManufacturer 0 iProduct 1 USB2.0 Hub iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 25 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 Unused bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0001 1x 1 bytes bInterval 255 Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 4 wHubCharacteristic 0x00e0 Ganged power switching Ganged overcurrent protection Port indicators bPwrOn2PwrGood 50 * 2 milli seconds bHubContrCurrent 100 milli Ampere DeviceRemovable 0x00 PortPwrCtrlMask 0xff Hub Port Status: Port 1: 0000.0100 power Port 2: 0000.0103 power enable connect Port 3: 0000.0103 power enable connect Port 4: 0000.0100 power Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 1 Single TT bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0001 Self Powered Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 0 Full speed (or root) hub bMaxPacketSize0 64 idVendor 0x1d6b Linux Foundation idProduct 0x0001 1.1 root hub bcdDevice 2.06 iManufacturer 3 Linux 2.6.32-25-server ohci_hcd iProduct 2 OHCI Host Controller iSerial 1 0000:00:02.0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 25 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 9 Hub bInterfaceSubClass 0 Unused bInterfaceProtocol 0 Full speed (or root) hub iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0002 1x 2 bytes bInterval 255 Hub Descriptor: bLength 11 bDescriptorType 41 nNbrPorts 10 wHubCharacteristic 0x0002 No power switching (usb 1.0) Ganged overcurrent protection bPwrOn2PwrGood 1 * 2 milli seconds bHubContrCurrent 0 milli Ampere DeviceRemovable 0x00 0x00 PortPwrCtrlMask 0xff 0xff Hub Port Status: Port 1: 0000.0100 power Port 2: 0000.0100 power Port 3: 0000.0100 power Port 4: 0000.0103 power enable connect Port 5: 0000.0100 power Port 6: 0000.0103 power enable connect Port 7: 0000.0100 power Port 8: 0000.0100 power Port 9: 0000.0100 power Port 10: 0000.0100 power Device Status: 0x0003 Self Powered Remote Wakeup Enabled

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• Shuttle FB51 mobo does not boot with external USB drive attached [closed]

  - by user127236

  I am repurposing an old Alienware desktop as a home media server. The PC is based on the Shuttle FB51 motherboard. The BIOS is a Phoenix Version 6.00 PG, release date 12/16/2002. I have loaded Ubuntu 12.04 LTS on the internal hard drive. I am using a Western Digital WD Elements 1.5 TB USB 2.0 Desktop External Hard Drive for media storage. When the external drive is plugged in and the PC is powered on, it freezes very early in the BIOS self-test, even before it begins the memory test. If I unplug the drive, the self-test proceeds without further problems. I can plug the USB drive back in when the self-test is complete, and Ubuntu will boot and find the external drive normally. I've tried several changes to the BIOS setup without finding a cure for the boot issue. Any assistance gratefully accepted. JGB

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• Extract Certs from Apache

  - by user271619

  Recently I've had to uninstall a single Self-Signed SSL Certificate from one of my Apache boxes, specifically for an outside party. That's not really a problem for me, since it was easy. What confuses me is how they knew I had a self-signed certificate. The domain I provided them was not related to the domain with the self-signed certificate. Does this mean Apache publicizes the Virtual hosts in the httpd.conf file? I asked the outside party what software they used to extract information from my server, and they provided this GitHub link: https://gist.github.com/4ndrej/4547029 I figured I'd ask the community first, before I attempt installing the Java program.

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• becomeFirstResponder not working!!!

  - by vikinara

  In the below code becomeFirstResonder not working, only resignFirstresponder working...can anyone please help - (BOOL)textFieldShouldReturn:(UITextField *)textField { if (textField == txtDate) { [txtDate resignFirstResponder]; [txtTime becomeFirstResponder]; } if (textField == txtTime) { [txtTime resignFirstResponder]; [txtAddress becomeFirstResponder]; } if (textField == txtAddress) { [txtAddress resignFirstResponder]; [txtCity becomeFirstResponder]; } if (textField == txtCity) { [txtCity resignFirstResponder]; [txtState becomeFirstResponder]; } if(textField == txtState) { [txtState resignFirstResponder]; [txtZip becomeFirstResponder]; } if (textField == txtZip) { [txtZip resignFirstResponder]; } return NO; } - (BOOL)textFieldShouldEndEditing:(UITextField *)textField { if(textField == txtDate) { NSString *dateString = txtDate.text; NSString *dateRegex = @"^(1[0-2]|0[1-9])/(3[01]|[12][0-9]|0[1-9])/[0-9]{4}$"; NSPredicate *dateTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", dateRegex]; BOOL validateDate = [dateTest evaluateWithObject:dateString]; if(!validateDate){ UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Date Error." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtDate.text = nil; } } if(textField == txtTime) { NSString *timeString = txtTime.text; NSString *timeRegex = @"^(([0]?[0-5][0-9]|[0-9]):([0-5][0-9]))$"; NSPredicate *timeTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", timeRegex]; BOOL validateTime = [timeTest evaluateWithObject:timeString]; if(!validateTime) { UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Incorrect Time Entry." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtTime.text = nil; } } if(textField == txtAddress) { NSString *addressString = txtAddress.text; NSString *addressRegex = @"^[a-z0-9 ]+$"; NSPredicate *addressTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", addressRegex]; BOOL validateAddress = [addressTest evaluateWithObject:addressString]; if(!validateAddress) { UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Incorrect State." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtAddress.text = nil; } } if(textField == txtState) { NSString *stateString = txtState.text; NSString *stateRegex = @"^(?-i:A[LKSZRAEP]|C[AOT]|D[EC]|F[LM]|G[AU]|HI|I[ADLN]|K[SY]|LA|M[ADEHINOPST]|N[CDEHJMVY]|O[HKR]|P[ARW]|RI|S[CD]|T[NX]|UT|V[AIT]|W[AIVY])$"; NSPredicate *stateTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", stateRegex]; BOOL validateState = [stateTest evaluateWithObject:stateString]; if(!validateState) { UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Incorrect State." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtState.text = nil; } } if(textField == txtCity) { NSString *cityString = txtCity.text; NSString *cityRegex = @"^[a-z ]+$"; NSPredicate *cityTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", cityRegex]; BOOL validateCity = [cityTest evaluateWithObject:cityString]; if(!validateCity) { UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Incorrect City." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtCity.text = nil; } } if(textField == txtZip) { NSString *zipString = txtZip.text; NSString *zipRegex = @"^[0-9]{5}([- /]?[0-9]{4})?$"; NSPredicate *zipTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", zipRegex]; BOOL validateZip = [zipTest evaluateWithObject:zipString]; if(!validateZip) { UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:nil message:@"Incorrect Zip." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert2 show]; [alert2 release]; txtZip.text = nil; } } return NO; }

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• Act on click of a button on the Nav Bar for moreNavigationController -- Can't pushviewcontroller

  - by Jann

  Okay, here is my issue: My app has a display of categories in the tab bar at the bottom of the iPhoneOS screen. This only allows 5 categories before it presents the MORE button. I have over 25 (please do not answer this by saying: "Rethink your application...etc" -- that was rudely said before. They are food, drink, etc categories and cannot be changed). I want to allow the user to put their favorites on the home page. The Apple moreNavigationController editing system only allows 20 tab bar items to be rearranged due to space constraints on the editing page. This is not enough so i need to implement my own Editing screen. I set the rightBarButtonItem to nil and created my own. Using NSLog, i can see the "click" happens when clicking the EDIT button, but I cannot push using pushViewController. Nothing happens. I think it has something to do with the navigationController I am addressing...but i am not sure. ps: This all happens in my App Delegate which DOES act as both UITabBarControllerDelegate & UINavigationControllerDelegate. I tried to do the following: - ( void )navigationController:( UINavigationController * )navigationController_local willShowViewController:( UIViewController * )viewController_local animated:( BOOL )animated { UIViewController * currentController = navigationController_local.visibleViewController; UIViewController * nextController = viewController_local; // Do whatever here. NSLog(@"Nav contoller willShowViewController fired\n'%@'\n'%@'\nThere are currently: %d views on the stack\n",currentController,nextController,[self.navigationController.viewControllers count]); if ( [nextController isKindOfClass:NSClassFromString(@"UIMoreListController")]) { UINavigationBar *morenavbar = navigationController_local.navigationBar; UINavigationItem *morenavitem = morenavbar.topItem; morenavitem.rightBarButtonItem = nil; NSLog(@"Is a UIMoreListController\n"); UIBarButtonItem *editTabBarButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self action:@selector(editTabBar:)]; morenavitem.rightBarButtonItem = editTabBarButton; [editTabBarButton release]; } } This works to place an EDIT button at the top right of the screen -- mimicking Apple's look and feel... but when that button is clicked, you cannot exit the darn moreNavigationController. I have tried many things. UIAlerts work, etc...but pushing (or popping -- even popping to root view) a view controller on the stack does not. - (void) editTabBar:(id)sender { NSLog(@"clicked edit tabbar\n"); NSLog(@"Total count of controllers: %d\n",[self.navigationController.viewControllers count]); TabBarViewController *tabBarViewController2 = [[TabBarViewController alloc] initWithNibName:@"TabBarView" bundle:nil]; tabBarViewController2.navigationItem.title=@"Edit Tab Bar"; [self.navigationController pushViewController:tabBarViewController2 animated:YES]; [tabBarViewController2 release]; NSLog(@"finished edit tabbar\n"); } If you click the edit button on the moreNavigationController's display page, you get the log entries like expected AND (this is strange) the views on the stack climbs -- but no page change occurs. I marked it down to not using the correct navigation controller...but I am lost on how to find which one TO use. this is a weird one too. In the edit function if i just do this: - (void) editTabBar:(id)sender { self.tabBarController.selectedIndex = 0; } It DOES take me home (to tabbarcontroller 0) BUT doing this: - (void) editTabBar:(id)sender { [self.navigationController popToRootViewControllerAnimated:YES]; } does not work. Does the moreNavigationController have some special quality that screws with the rest of the system?

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• How to have two UIPickerViews together in one ViewController?

  - by 0SX

  I'm trying to put 2 UIPickerViews together in one ViewController. Each UIPickerView has different data arrays. I'm using interface builder to link the pickers up. I know I'll have to use separate delegates and dataSources but I can't seem to hook everything up with interface builder correctly. Here's all my code: pickerTesting.h #import <UIKit/UIKit.h> #import "picker2DataSource.h" @interface pickerTestingViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>{ IBOutlet UIPickerView *picker; IBOutlet UIPickerView *picker2; NSMutableArray *pickerViewArray; } @property (nonatomic, retain) IBOutlet UIPickerView *picker; @property (nonatomic, retain) IBOutlet UIPickerView *picker2; @property (nonatomic, retain) NSMutableArray *pickerViewArray; @end pickerTesting.m #import "pickerTestingViewController.h" @implementation pickerTestingViewController @synthesize picker, picker2, pickerViewArray; - (void)viewDidLoad { [super viewDidLoad]; pickerViewArray = [[NSMutableArray alloc] init]; [pickerViewArray addObject:@" 100 "]; [pickerViewArray addObject:@" 200 "]; [pickerViewArray addObject:@" 400 "]; [pickerViewArray addObject:@" 600 "]; [pickerViewArray addObject:@" 1000 "]; [picker selectRow:1 inComponent:0 animated:NO]; picker2.delegate = self; picker2.dataSource = self; } - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)picker; { return 1; } - (void)pickerView:(UIPickerView *)picker didSelectRow:(NSInteger)row inComponent:(NSInteger)component { } - (NSInteger)pickerView:(UIPickerView *)picker numberOfRowsInComponent:(NSInteger)component; { return [pickerViewArray count]; } - (NSString *)pickerView:(UIPickerView *)picker titleForRow:(NSInteger)row forComponent:(NSInteger)component; { return [pickerViewArray objectAtIndex:row]; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end And I have a separate class for the other datasource. picker2DataSource.h @interface picker2DataSource : NSObject <UIPickerViewDataSource, UIPickerViewDelegate> { NSMutableArray *customPickerArray; } @property (nonatomic, retain) NSMutableArray *customPickerArray; @end picker2DataSource.m #import "picker2DataSource.h" @implementation picker2DataSource @synthesize customPickerArray; - (id)init { // use predetermined frame size self = [super init]; if (self) { customPickerArray = [[NSMutableArray alloc] init]; [customPickerArray addObject:@" a "]; [customPickerArray addObject:@" b "]; [customPickerArray addObject:@" c "]; [customPickerArray addObject:@" d "]; [customPickerArray addObject:@" e "]; } return self; } - (void)dealloc { [customPickerArray release]; [super dealloc]; } - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)picker2; { return 1; } - (void)pickerView:(UIPickerView *)picker2 didSelectRow:(NSInteger)row inComponent:(NSInteger)component { } - (NSInteger)pickerView:(UIPickerView *)picker2 numberOfRowsInComponent:(NSInteger)component; { return [customPickerArray count]; } - (NSString *)pickerView:(UIPickerView *)picker2 titleForRow:(NSInteger)row forComponent:(NSInteger)component; { return [customPickerArray objectAtIndex:row]; } @end Any help or code examples would be great. Thanks.

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• uiscrollview not switching image subviews

  - by nickthedude

  I'm building a comic viewer app, that consists of two view controllers, the root viewcontroller basically displays a view where a user decides what comic they want to read by pressing a button. The second viewController actually displays the comic as a uiscrollview with a toolbar and a title at the top. So the problem I am having is that the comic image panels themselves are not changing from whatever the first comic you go to if you select another comic after viewing the first one. The way I set it up, and I admit it's not exactly mvc, so please don't hate, anyway the way I set it up is each comic uiscrollview consists of x number of jpg images where each comic set's image names have a common prefix and then a number like 'funny1.jpg', 'funny2.jpg', 'funny3.jpg' and 'soda1.jpg', 'soda2.jpg', 'soda3.jpg', etc... so when a user selects a comic to view in the root controller it makes a call to the delegate and sets ivars on instances of the comicviewcontroller that belongs to the delegate (mainDelegate.comicViewController.property) I set the number of panels in that comic, the comic name for the title label, and the image prefix. The number of images changes(or at least the number that you can scroll through), and the title changes but for some reason the images are the same ones as whatever comic you clicked on initially. I'm basing this whole app off of the 'scrolling' code sample from apple. I thought if I added a viewWillAppear:(BOOL) animated call to the comicViewController everytime the user clicked the button that would fix it but it didn't, after all that is where the scrollview is laid out. Anyway here is some code from each of the two controllers: RootController: -(IBAction) launchComic2{ AppDelegate *mainDelegate = [(AppDelegate *) [UIApplication sharedApplication] delegate]; mainDelegate.myViewController.comicPageCount = 3; mainDelegate.myViewController.comicTitle.text = @"\"Death by ETOH\""; mainDelegate.myViewController.comicImagePrefix = @"etoh"; [mainDelegate.myViewController viewWillAppear:YES]; [mainDelegate.window addSubview: mainDelegate.myViewController.view]; comicViewController: -(void) viewWillAppear:(BOOL)animated { self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor]; // 1. setup the scrollview for multiple images and add it to the view controller // // note: the following can be done in Interface Builder, but we show this in code for clarity [scrollView1 setBackgroundColor:[UIColor whiteColor]]; [scrollView1 setCanCancelContentTouches:NO]; scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite; scrollView1.clipsToBounds = YES; // default is NO, we want to restrict drawing within our scrollview scrollView1.scrollEnabled = YES; // pagingEnabled property default is NO, if set the scroller will stop or snap at each photo // if you want free-flowing scroll, don't set this property. scrollView1.pagingEnabled = YES; // load all the images from our bundle and add them to the scroll view NSUInteger i; for (i = 1; i <= self.comicPageCount; i++) { NSString *imageName = [NSString stringWithFormat:@"%@%d.jpg", self.comicImagePrefix, i]; NSLog(@"%@%d.jpg", self.comicImagePrefix, i); UIImage *image = [UIImage imageNamed:imageName]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; // setup each frame to a default height and width, it will be properly placed when we call "updateScrollList" CGRect rect = imageView.frame; rect.size.height = kScrollObjHeight; rect.size.width = kScrollObjWidth; imageView.frame = rect; imageView.tag = i; // tag our images for later use when we place them in serial fashion [scrollView1 addSubview:imageView]; [imageView release]; } [self layoutScrollImages]; // now place the photos in serial layout within the scrollview } - (void)layoutScrollImages { UIImageView *view = nil; NSArray *subviews = [scrollView1 subviews]; // reposition all image subviews in a horizontal serial fashion CGFloat curXLoc = 0; for (view in subviews) { if ([view isKindOfClass:[UIImageView class]] && view.tag 0) { CGRect frame = view.frame; frame.origin = CGPointMake(curXLoc, 0); view.frame = frame; curXLoc += (kScrollObjWidth); } } // set the content size so it can be scrollable [scrollView1 setContentSize:CGSizeMake((self.comicPageCount * kScrollObjWidth), [scrollView1 bounds].size.height)]; } Any help would be appreciated on this. Nick

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• Dynamic model choice field in django formset using multiple select elements

  - by Aryeh Leib Taurog

  I posted this question on the django-users list, but haven't had a reply there yet. I have models that look something like this: class ProductGroup(models.Model): name = models.CharField(max_length=10, primary_key=True) def __unicode__(self): return self.name class ProductRun(models.Model): date = models.DateField(primary_key=True) def __unicode__(self): return self.date.isoformat() class CatalogItem(models.Model): cid = models.CharField(max_length=25, primary_key=True) group = models.ForeignKey(ProductGroup) run = models.ForeignKey(ProductRun) pnumber = models.IntegerField() def __unicode__(self): return self.cid class Meta: unique_together = ('group', 'run', 'pnumber') class Transaction(models.Model): timestamp = models.DateTimeField() user = models.ForeignKey(User) item = models.ForeignKey(CatalogItem) quantity = models.IntegerField() price = models.FloatField() Let's say there are about 10 ProductGroups and 10-20 relevant ProductRuns at any given time. Each group has 20-200 distinct product numbers (pnumber), so there are at least a few thousand CatalogItems. I am working on formsets for the Transaction model. Instead of a single select menu with the several thousand CatalogItems for the ForeignKey field, I want to substitute three drop-down menus, for group, run, and pnumber, which uniquely identify the CatalogItem. I'd also like to limit the choices in the second two drop-downs to those runs and pnumbers which are available for the currently selected product group (I can update them via AJAX if the user changes the product group, but it's important that the initial page load as described without relying on AJAX). What's the best way to do this? As a point of departure, here's what I've tried/considered so far: My first approach was to exclude the item foreign key field from the form, add the substitute dropdowns by overriding the add_fields method of the formset, and then extract the data and populate the fields manually on the model instances before saving them. It's straightforward and pretty simple, but it's not very reusable and I don't think it is the right way to do this. My second approach was to create a new field which inherits both MultiValueField and ModelChoiceField, and a corresponding MultiWidget subclass. This seems like the right approach. As Malcolm Tredinnick put it in a django-users discussion, "the 'smarts' of a field lie in the Field class." The problem I'm having is when/where to fetch the lists of choices from the db. The code I have now does it in the Field's __init__, but that means I have to know which ProductGroup I'm dealing with before I can even define the Form class, since I have to instantiate the Field when I define the form. So I have a factory function which I call at the last minute from my view--after I know what CatalogItems I have and which product group they're in--to create form/formset classes and instantiate them. It works, but I wonder if there's a better way. After all, the field should be able to determine the correct choices much later on, once it knows its current value. Another problem is that my implementation limits the entire formset to transactions relating to (CatalogItems from) a single ProductGroup. A third possibility I'm entertaining is to put it all in the Widget class. Once I have the related model instance, or the cid, or whatever the widget is given, I can get the ProductGroup and construct the drop-downs. This would solve the issues with my second approach, but doesn't seem like the right approach.

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