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• Properties in User-Control Ctor are duplicated to the hosting form

  - by fortis

  An annoying behavior of Visual Studio (2008)'s designer is to duplicate any property of a control, which is set inside the control's constructor code to the InitializeComponent() method of the hosting form. For example, if I create a new user control and write the following line in its Ctor: this.Text = "Hard Coded Name"; then this same line will appear inside the InitializeComponent() method of any form hosting this control. As long as it's about this kind of properties, it's only annoying because if I were to change the Text property inside the control to: "Better Hard Coded Name", I'd have to go over all hosting controls and manually change the Text value over there too. The real problem is with ".Add(something)" properties - like if my control is a TableLayoutPanel and I want it to have a certain number of columns and rows. Any col or row style set inside the user control will be duplicated in the hosting form and we end up with having twice as wanted. The count (e.g. ColumnCount) will be as planned but if I were to add cols later on, things will get messy. Is there a way to signal VS's designer not to duplicate properties? What can I do to avoid this behavior?

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• Android - How to decide wether to run a Service in a separate Process?

  - by pableu

  I am working on an Android application that collects sensor data over the course of multiple hours. For that, we have a Service that collects the Sensor Data (e.g. Acceleration, GPS, ..), does some processing and stores them remotely on a server. Currently, this Service runs in a separate process (using android:service=":background" in the manifest). This complicates the communication between the Activities and the Service, but my predecessors created the Application this way because they thought that separating the Service from the Activities would make it more stable. I would like some more factual reasons for the effort of running a separate process. What are the advantages? Does it really run more stable? Is the Service less likely to be killed by the OS (to free up resources) if it's in a separate process? Our Application uses startForeground() and friends to minimize the chance of getting killed by the OS. The Android docs are not very specific about this, the mostly state that it depends on the Application's purpose ;-) TL;DR What are objective reasons to put a long-running Service in a separate process (in Android)?

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• how can I cache a partial retrieved through link_to_remote in rails?

  - by Angela

  I use link_to_remote to pull the dynamic contents of a partial onto the page. It's basically a long row from a database of "todo's" for the day. So as the person goes through and checks them off, I want to show the updated list with a line through those that are finished. Currently, I end up needing to click on the link_to_remote again after an item is ticked off, but would like it to redirect back to the "cached" page of to-do's but with the one item lined through. How do I do that? Here is the main view: <% @campaigns.each do |campaign| %> <!--link_to_remote(name, options = {}, html_options = nil)--> <tr><td> <%= link_to_remote(campaign.name, :update => "campaign_todo", :url => {:action => "campaign_todo", :id => campaign.id } ) %> </td></tr> <% end %> </table> <div id="campaign_todo"> </div> I'd like when the New/Create actions are done to go back to the page that redirected it there.

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• numbers aren't right when reading text file, have to tally up number of 5 letter words and 6 or more

  - by user320950

  i want to do this: reads the words in the file one at a time. (Use a string to do this) Counts three things: how many single-character words are in the file, how many short (2 to 5 characters) words are in the file, and how many long (6 or more characters) words are in the file. HELP HERE im not sure on how about reading file into a string. i know i have to something like this but i dont understand the rest. HELP HERE ifstream infile; //char mystring[6]; //char mystring[20]; int main() { infile.open("file.txt"); if(infile.fail()) { cout << " Error " << endl; } int numb_char=0; char letter; while(!infile.eof()) { infile.get(letter); cout << letter; numb_char++; break; } cout << " the number of characters is :" << numb_char << endl; infile.close(); return 0;

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• run two thread at the same time in java

  - by user1805005

  i have used timertask to schedule my java program. now when the run method of timertask is in process, i want to run two threads which run at the same time and do different functions. here is my code.. please help me.. import java.util.Calendar; import java.util.Date; import java.util.Timer; import java.util.TimerTask; public class timercheck extends TimerTask{ // my first thread Thread t1 = new Thread(){ public void run(){ for(int i = 1;i <= 10;i++) { System.out.println(i); } } }; // my second thread Thread t2 = new Thread(){ public void run(){ for(int i = 11;i <= 20;i++) { System.out.println(i); } } }; public static void main(String[] args){ long ONCE_PER_DAY = 1000*60*60*24; Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.HOUR_OF_DAY, 12); calendar.set(Calendar.MINUTE, 05); calendar.set(Calendar.SECOND, 00); Date time = calendar.getTime(); TimerTask check = new timercheck(); Timer timer = new Timer(); timer.scheduleAtFixedRate(check, time ,ONCE_PER_DAY); } @Override // run method of timer task public void run() { t1.start(); t2.start(); } }

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• Overload the behavior of count() when called on certain objects

  - by Tom

  In PHP 5, you can use magic methods, overload some classes, etc. In C++, you can implement functions that exist is STL as long as the argument types are different. Is there a way to do this in PHP? An example of what I'd like to do is this: class a { function a() { $this->list = array("1", "2"); } } $blah = new a(); count($blah); I would like blah to return 2. IE count the values of a specific array in the class. So in C++, the way I would do this might look like this: int count(a varName) { return count(varName->list); } Basically, I am trying to simplify data calls for a large application so I can call do this: count($object); rather than count($object->list); The list is going to be potentially a list of objects so depending on how it's used, it could be really nasty statement if someone has to do it the current way: count($object->list[0]->list[0]->list); So, can I make something similar to this: function count(a $object) { count($object->list); } I know PHP's count accepts a mixed var, so I don't know if I can override an individual type.

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• Need help INSERT record(s) MySQL DB

  - by JM4

  I have an online form which collects member(s) information and stores it into a very long MySQL database. We allow up to 16 members to enroll at a single time and originally structured the DB to allow such. For example: If 1 Member enrolls, his personal information (first name, last name, address, phone, email) are stored on a single row. If 15 Members enroll (all at once), their personal information are stored in the same single row. The row has information housing columns for all 'possible' inputs. I am trying to consolidate this code and having every nth member that enrolls put onto a new record within the database. I have seen sugestions before for inserting multiple records as such: INSERT INTO tablename VALUES (('$f1name', '$f1address', '$f1phone'), ('$f2name', '$f2address', '$f2phone')... The issue with this is two fold: I do not know how many records are being enrolled from person to person so the only way to make the statement above is to use a loop The information collected from the forms is NOT a single array so I can't loop through one array and have it parse out. My information is collected as individual input fields like such: Member1FirstName, Member1LastName, Member1Phone, Member2Firstname, Member2LastName, Member2Phone... and so on Is it possible to store information in separate rows WITHOUT using a loop (and therefore having to go back and completely restructure my form field names and such (which can't happen due to the way the validation rules are built.)

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• Passing huge amounts of data as an hexadecimal (0x123AB...) parameter of a clr stored procedure in s

  - by user193655

  I post this question has followup of This question, since the thread is not recieving more answers. I'm trying to understand if it is possible to pass as a parameter of a CLR stored procedure a large amount of data as "0x5352532F...". This is to avoid to send the data directly to the CLR stored procedure, instead of sending ti to a temporary DB field and from there passing it as varbinary(max) parmeter to the CLR stored procedure. I have a triple question: 1) is it possible, if yes how? Let's say i want to pass a pdf file to the CLR stored procedure (not the path, the full bits that make up the file). Something like: exec MyCLRStoredProcs.dbo.insertfile @file_remote_path ='c:\temp\test_file.txt' , @file_contents=0x4D5A90000300000004000.... --(this long list is the file content) where insertfile is a stored proc that writes to the server path (at file_remote_path) the binary data I pass as (file_contents). 2) is it there corruption risk of adopting this approach (or it is the same approach that sql server uses behind the scenes)? 3) how to convert the content of a file into the "0x23423..." hexadecimal representation

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• where is c function attribute set (how to unset) with gcc

  - by cvsdave

  I am working with code from the GNU core utils, and find that the void usage() function is apparently set with the attribute "noreturn". Well, I am modifying the function, and I wish it to return (I removed the call to exit()). The compiler still complains that a "noreturn" function returns, and when using the Eclipse CDT debugger, stepping thorugh the code is anomolous - I skip over lines of code. I do not see the function be set in the .c file, and there is no .h file for this .c file. The file is df.c. I have renamed the file df_call.c. How can the compiler be finding this attribute? How can I unset it? Thanks. ======= Thanks to all contributors for their help! The short answer is "the usage() function found in GNUutils 7.4 is prototyped in system.h as 'void usage (int status) ATTRIBUTE_NORETURN'. Changing to 'void usage (int status); /*ATTRIBUTE_NORETURN;*/' resolved the issue for me, but leaves the problem of a modified system.h. The long answer is: The GNU c compiler supports assigning attributes to functions (see http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html) one of which is "noreturn". The syntax is "attribute ((noreturn))" (see http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax) but is often macro'd to ATTRIBUTE_NORETURN. If the attribute is set, and in this case one tries to return from the function, the executable compiles with a complaint, but compiles and runs. It will, however, behave unexpectedly (skipping over src lines in my case, maybe due to the optimization). The debugger in Eclipse CDT actually jumps past lines of code, leading the developer to doubt his senses.

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• Windows service (hosting WCF service) stops immediately on start up

  - by Thr33Dii

  My Question: I cannot navigate to the base address once the service is installed because the service won't remain running (stops immediately). Is there anything I need to do on the server or my machine to make the baseAddress valid? Background: I'm trying to learn how to use WCF services hosted in Windows Services. I have read several tutorials on how to accomplish this and it seems very straight forward. I've looked at this MSDN article and built it step-by-step. I can install the service on my machine and on a server, but when I start the service, it stops immediately. I then found this tutorial, which is essentially the same thing, but it contains some clients that consume the WCF service. I downloaded the source code, compiled, installed, but when I started the service, it stopped immediately. Searching SO, I found a possible solution that said to define the baseAddress when instantiating the ServiceHost, but that didnt help either. My serviceHost is defined as: serviceHost = new ServiceHost( typeof( CalculatorService ), new Uri( "http://localhost:8000/ServiceModelSamples/service" ) ); My service name, base address, and endpoint: <service name="Microsoft.ServiceModel.Samples.CalculatorService" behaviorConfiguration="CalculatorServiceBehavior"> <host> <baseAddresses> <add baseAddress="http://localhost:8000/ServiceModelSamples/service"/> </baseAddresses> </host> <endpoint address="" binding="wsHttpBinding" contract="Microsoft.ServiceModel.Samples.ICalculator"/> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> I've verified the namespaces are identical. It's just getting frustrating that the tutorials seem to assume that the Windows service will start as long as all the stated steps are followed. I'm missing something and it's probably right in front of me. Please help!

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• What goes into the "Controller" in "MVC"?

  - by P72endragon

  I think I understand the basic concepts of MVC - the Model contains the data and behaviour of the application, the View is responsible for displaying it to the user and the Controller deals with user input. What I'm uncertain about is exactly what goes in the Controller. Lets say for example I have a fairly simple application (I'm specifically thinking Java, but I suppose the same principles apply elsewhere). I organise my code into 3 packages called app.model, app.view and app.controller. Within the app.model package, I have a few classes that reflect the actual behaviour of the application. These extends Observable and use setChanged() and notifyObservers() to trigger the views to update when appropriate. The app.view package has a class (or several classes for different types of display) that uses javax.swing components to handle the display. Some of these components need to feed back into the Model. If I understand correctly, the View shouldn't have anything to do with the feedback - that should be dealt with by the Controller. So what do I actually put in the Controller? Do I put the public void actionPerformed(ActionEvent e) in the View with just a call to a method in the Controller? If so, should any validation etc be done in the Controller? If so, how do I feedback error messages back to the View - should that go through the Model again, or should the Controller just send it straight back to View? If the validation is done in the View, what do I put in the Controller? Sorry for the long question, I just wanted to document my understanding of the process and hopefully someone can clarify this issue for me!

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• Getting a Script Error Every Time I Click a Link

  - by Flip4Life

  I have everything working perfectly on my site, but for some reason, I get an error message in console whenever I click a link anywhere on my site. The error has to do with this line of coding here: jQuery(function($){ $('.navbar a, .scroll a, .smoothscroll a').bind('click',function(event){ var $anchor = $(this); $('html, body').stop().animate({ scrollTop: $($anchor.attr('href')).offset().top }, 850,'easeInOutExpo'); event.preventDefault(); }); }); And the error I am getting is this: "SCRIPT5007: Unable to get value of the property 'top': object is null or undefined custom.min.js, line 6 character 197" The exact code it is highlighting is this part of the above code: $('html, body').stop().animate({ scrollTop: $($anchor.attr('href')).offset().top }, 850,'easeInOutExpo') All I know is that when I remove the above code, my scroll-to links stop working on pages such as these: http://www.northtownsremodeling.com/things-to-know.php You can see the popup error happen and stay in the console easily by going to a page with a filter like this: http://www.northtownsremodeling.com/bathroom/ And clicking one of the filter buttons. Ultimately, I am trying to make it so my scroll-to setting still works, but not have that error come up anymore. I made this script a long time ago, and I'm really confused as to what could be causing this error when everything is functioning perfectly otherwise? Thanks!

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• Location of DB models in Zend Framework - want them centralized

  - by jeffkolez

  Maybe I've been staring at the problem too long and it's much simpler than I think, but I'm stuck right now. I have three websites that are going to share database models. I've structured my applications so that I have an application directory for each site and a public directory for each site. The DB models live in a directory in the library along with Zend Framework and my third party libraries. I use the Autoloader class and when I try to instantiate one of my DB classes, it fails. The library directory is in my include path, but for whatever reason it refuses to instantiate my classes. It will work if I have my models in my application directory, but that's not the point. They're supposed to be shared classes in a Library. $model = new Model_Login(); $model->hello_world(); This fails when its in the library. The class is just a test: class Model_Login { public function hello_world() { echo "hello world"; } } Everything works until I try to instantiate one of my models. I've even tried renaming the class to something else (Db_Login), but that doesn't work either. Any ideas? Thanks in advance.

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• IE showing hidden div under certain circumstances

  - by karola

  After googling around and finding a lot of ie bugs I still did not find a description of the problem I have. The initial situation is a standard one. We have a tooltip which is actually a hidden div that will be displayed on mouseover at a given location. The div is hidden with display:none and contains a table with the content. We tried different libraries for showing the div (scriptaculous and jQuery Cluetip) but the effect is the same. The problem: Everything is fine as long as the contents fits the width of my window. But when I resize it until the horizontal scrollbar is activated the content of the hidden div will be shown at the end of the page when the tooltip is activated. This is really strange as it happens only under these premises. When more than one tooltip is involved the browser might even crash (and under Vista takes the whole system with him duh). I know it's a bit complicated to explain but I hope that someone at least had heard of that bug and can point me into the right direction.

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• Is it possible to get a truly unique id for a particular JVM instance?

  - by Uri

  I need a way to uniquely and permanently identify an instance of the JVM from within Java code running in that JVM. That is, if I have two JVMs running at the same time on the same machine, each is distinguishable. It is also distinguishable from running JVMs on other machines and from future executions on the same machine even if the process id is reused. I figure I could implement something like this by identifying the start time, the machine MAC, and the process id, and combining them in some way. I'm wondering if there is some standard way to achieve this. Update: I see that everyone recommended a UUID for the entire session. That seems like a good idea though possibly a little too heavyweight. Here is my problem though: I want to use the JVM id to create multiple unique identifiers in each JVM execution that somehow incorporate the JVM instance. My understanding is that you shouldn't really mix other numbers into a UUID because uniqueness is no longer guaranteed. An alternative is to make the UUID into a string and chain it, but then it becomes too long. Any ideas on overcoming this?

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• How to break an object into chunks based on some property?

  - by CurlyFro

  public class InvestorMailing { public string To { get; set; } public IEnumerable<string> Attachments { get; set; } public int AttachmentCount { get; set; } public long AttachmentSize { get; set; } } i have an IList<InvestorMailing> mailingList. if the attachment size is greater than x, then i need to split my object into chunks. is there an easy linq-y way to do this? Edited: this is how i'm generating my mailings: var groupedMailings = mailingList.GroupBy(g => g.GroupBy); var investorMailings = groupedMailings.Select( g => new DistinctInvestorMailing { Id = g.Select(x => x.Id).FirstOrDefault(), To = g.Key.Trim(), From = g.Select(x => x.From).FirstOrDefault(), FromName = g.Select(x => x.FromName).FirstOrDefault(), Bcc = g.Select(x => x.Bcc).FirstOrDefault(), DeliveryCode = g.Select(x => x.DeliveryCode).FirstOrDefault(), Subject = g.Select(x => x.Subject).FirstOrDefault(), Body = g.Select(x => x.Body).FirstOrDefault(), CommentsOnStatus = g.Select(x => x.CommentsOnStatus).FirstOrDefault(), Attachments = g.Select(x => x.AttachmentPath), AttachmentCount = g.Select(x => x.AttachmentPath).Count(), AttachmentSize = g.Sum(x => x.AttachmentSize), MailType = g.Select(x => x.MessageType).FirstOrDefault() } ).ToList();

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• Page specific CSS or a single css file when developing a mobile (webkit) based site?

  - by Mike

  I am working on a mobile site for webkit browsers. I have been trying to find information on using multiple style sheets versus a single css file. There is a lot of information on this topic, but it not a lot of information pertaining to mobile browsers. My site will have a bunch of pages that while have page specific css. For a non-mobile site, it seems like generally people say that a single file will be faster, but that multiple files are easier to develop. However, on a mobile site is that still the case? If you put everything in one file, that will get cached after load, but that will make the first load slower. If you had page specific files, the first page would get loaded quicker, but every other page would then take a hit while making the page specific css http request. Does anyone have any thoughts on this? It sounds like they are saying one file is better as long as its under 1 MB (which my files def will)? http://www.yuiblog.com/blog/2010/07/12/mobile-browser-cache-limits-revisited/

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• How many hours a day (of the standard 8) do you actually work? [closed]

  - by someone

  Possible Duplicate: How much do you [really] work a day When I started working (not so long ago), I was very conscientious about really working. If I didn't work for 10 minutes at a time, I felt like I was cheating. But as I started to look around me, I realized that I was the only one... and most of my coworkers were spending a big percentage of their time browsing the internet or playing solitaire. I started to slack off a little more than usual... while still basically getting all my work done. But while I do all that's required of me, and usually quickly, I no longer beg for work to fill up my spare time; I'm content to do what I'm told and play around when no one makes sure I'm busy enough. Which means that I'm often bored and underutilized. (Which I was even when I begged for work - people are pretty laid back about the workload and don't seem to realize how much I can get done if pushed to the fullest.) But I was just talking to a friend who graduated with me and also recently started working... and she came to me with the same concerns about slacking. She's working remotely, which means there are often gaps in communication when she can't really get anything done... And she's feeling guilty about it. Which made me rethink the whole thing... So, as workers, how many hours, out of the 8 standard average, are you actually working (honestly)? And, as bosses, how many hours do you expect your workers to work? And from an ethical standpoint, how much free time, or space out time, can workers have during the day without being considered to be "cheating" their office of labor and money?

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• [Ruby on Rails] how to add a new entry with a multiple has_many association?

  - by siulamvictor

  I am not sure am I doing these correct. I have 3 models, Account, User, and Event. Account contains a group of Users. Each User have its own username and password for login, but they can access the same Account data under the same Account. Events is create by a User, which other Users in the same Account can also read or edit it. I created the following migrations and models. User migration class CreateUsers < ActiveRecord::Migration def self.up create_table :users do |t| t.integer :account_id t.string :username t.string :password t.timestamps end end def self.down drop_table :users end end Account migration class CreateAccounts < ActiveRecord::Migration def self.up create_table :accounts do |t| t.string :name t.timestamps end end def self.down drop_table :accounts end end Event migration class CreateEvents < ActiveRecord::Migration def self.up create_table :events do |t| t.integer :account_id t.integer :user_id t.string :name t.string :location t.timestamps end end def self.down drop_table :events end end Account model class Account < ActiveRecord::Base has_many :users has_many :events end User model class User < ActiveRecord::Base belongs_to :account end Event model class Event < ActiveRecord::Base belongs_to :account belongs_to :user end so.... Is this setting correct? Every time when a user create a new account, the system will ask for the user information, e.g. username and password. How can I add them into correct tables? How can I add a new event? I am sorry for such a long question. I am not very understand the rails way in handling such data structure. Thank you guys for answering me. :)

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• Implement two functions with the same name but different, non-covariant return types due to multiple abstract base classes

  - by user1508167

  If I have two abstract classes defining a pure virtual function with the same name, but different, non-covariant return types, how can I derive from these and define an implementation for both their functions? #include <iostream> class ITestA { public: virtual ~ITestA() {}; virtual float test() =0; }; class ITestB { public: virtual ~ITestB() {}; virtual bool test() =0; }; class C : public ITestA, public ITestB { public: /* Somehow implement ITestA::test and ITestB::test */ }; int main() { ITestA *a = new C(); std::cout << a->test() << std::endl; // should print a float, like "3.14" ITestB *b = dynamic_cast<ITestB *>(a); if (b) { std::cout << b->test() << std::endl; // should print "1" or "0" } delete(a); return 0; } As long as I don't call C::test() directly there's nothing ambiguous, so I think that it should work somehow and I guess I just didn't find the right notation yet. Or is this impossible, if so: Why?

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• A good(elegant) way to retrieve records with counts.

  - by user93422

  Context: ASP.NET MVC 2.0, C#, SQL Server 2007, IIS7 I have 'scheduledMeetings' table in the database. There is a one-to-many relationship: scheduledMeeting - meetingRegistration So that you could have 10 people registered for a meeting. meetingRegistration has fields Name, and Gender (for example). I have a "calendar view" on my site that shows all coming events, as well as gender count for each event. At the moment I use Linq to Sql to pull the data: var meetings = db.Meetings.Select( m => new { MeetingId = m.Id, Girls = m.Registrations.Count(r => r.Gender == 0), Boys = m.Registrations.Count(r=>r.Gender == 1) }); (actual query is half-a-page long) Because there is anonymous type use going on I cant extract it into a method (since I have several different flavors of calendar view, with different information on each, and I dont want to create new class for each). Any suggestions on how to improve this? Is database view is the answer? Or should I go ahead and create named-type? Any feedback/suggestions are welcome. My DataLayer is huge, I want to trim it, just dont know how. Pointers to a good reading would be good too.

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• Drupal 7: How can I create a key/value field(or field group, if that's even possible)?

  - by Su'

  Let's say I'm creating some app documentation. In creating a content type for functions, I have a text field for name, a box for a general description, and a couple other basic things. Now I need something for storing arguments to the function. Ideally, I'd like to input these as key-value pairs, or just two related fields, which can then be repeated as many times as needed for the given function. But I can't find any way to accomplish this. The closest I've gotten is an abandonded field multigroup module that says to wait for CCK3, which hasn't even produced an alpha yet as far as I can tell and whose project page makes no obvious mention of this multi-group functionality. I also checked the CCK issue queue and don't think I saw it in there, either. Is there a current viable way of doing this I'm not seeing? Viable includes "you're thinking of this the wrong way and do X instead." I've considered using a "Long text and summary" field, but that smells hackish and I don't know if I'd be setting myself up for side-effects. I'm new to Drupal.

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• Convert binary unsigned vector to dec list

  - by Juan

  This code convert a unsigned long vector variable cR1 to NB_ERRORS numbers (in 'a' variable I print these numbers). for (l = 0; l < NB_ERRORS; ++l) { k = (l * EXT_DEGREE) / BIT_SIZE_OF_LONG; j = (l * EXT_DEGREE) % BIT_SIZE_OF_LONG; a = cR1[k] >> j; if(j + EXT_DEGREE > BIT_SIZE_OF_LONG) a ^= cR1[k + 1] << (BIT_SIZE_OF_LONG - j); a &= ((1 << EXT_DEGREE) - 1); printf("\na=%d\n",a); } For example I am have a cR1 with two elements that follow: 0,0,1,1,0,1,0,0,0,0,1,0,0,1,1,1,1,1,0,0,1,1,1,1,0,0,0,1,1,0,0,0,1,0,1,1,0,0,1,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,1,0,0,1,1,1,1,0, executing that code I get (44), (228, (243), (24), (77), (39), (117), (121). This code convert from right to left, I want modify to convert from right to left, Where I will be able to modify this? pdta: In the example case EXT_DEGREE = 8, BIT_SIZE_OF_LONG = 32

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• selected option not clearing from memory android

  - by user2980560

  I have a small random number spinner that when you click gives a random number. I am having two problems. The first is when the main activity loads it displays a random number on the screen without the random number spinner being clicked. I am unsure what to set to false to keep it from opening with the main activity. The second problem is that when you select an option from the spinner it does not clear. Meaning that If you click on option D6 or D20 then you can not click on the same option again until selecting the other option first. Essentially the selection does not clear out of memory after the random number is selected. Here is the random number code public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Random rand = new Random(); int roll; // An item was selected. if (spinner1.getSelectedItemPosition()==0) { roll = rand.nextInt(6)+1; } else { roll = rand.nextInt(20)+1; } // Put the result into a string. String text = "You rolled a " + roll; // Build a dialog box and with the result string and a single button AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setMessage(text).setCancelable(false) .setPositiveButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // do things when the user clicks ok. } }); AlertDialog alert = builder.create(); // Show the dialog box. alert.show(); }

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• Zoom in Java Swing application

  - by Shirky

  Hi there, I am looking for ways to zoom in a Java Swing application. That means that I would like to resize all components in a given JPanel by a given factor as if I would take an screenshot of the UI and just applied an "Image scale" operation. The font size as well as the size of checkboxes, textboxes, cursors etc. has to be adjusted. It is possible to scale a component by applying transforms to a graphics object: protected Graphics getComponentGraphics(Graphics g) { Graphics2D g2d=(Graphics2D)g; g2d.scale(2, 2); return super.getComponentGraphics(g2d); } That works as long as you don't care about self-updating components. If you have a textbox in your application this approach ceases to work since the textbox updates itself every second to show the (blinking) cursor. And since it doesn't use the modified graphics object this time the component appears at the old location. Is there a possibility to change a components graphics object permanently? There is also a problem with the mouse click event handlers. The other possibility would be to resize all child components of the JPanel (setPreferredSize) to a new size. That doesn't work for checkboxes since the displayed picture of the checkbox doesn't change its size. I also thought of programming my own layout manager but I don't think that this will work since layout managers only change the position (and size) of objects but are not able to zoom into checkboxes (see previous paragraph). Or am I wrong with this hypothesis? Do you have any ideas how one could achieve a zoomable Swing GUI without programming custom components? I looked for rotatable user interfaces because the problem seems familiar but I also didn't find any satisfying solution to this problem. Thanks for your help, Chris

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