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  • How to debug anomalous C memory/stack problems

    - by EBM
    Hello, Sorry I can't be specific with code, but the problems I am seeing are anomalous. Character string values seem to be getting changed depending on other, unrelated code. For example, the value of the argument that is passed around below will change merely depending on if I comment out one or two of the fprintf() calls! By the last fprintf() the value is typically completely empty (and no, I have checked to make sure I am not modifying the argument directly... all I have to do is comment out a fprintf() or add another fprintf() and the value of the string will change at certain points!): static process_args(char *arg) { /* debug */ fprintf(stderr, "Function arg is %s\n", arg); ...do a bunch of stuff including call another function that uses alloc()... /* debug */ fprintf(stderr, "Function arg is now %s\n", arg); } int main(int argc, char *argv[]) { char *my_arg; ... do a bunch of stuff ... /* just to show you it's nothing to do with the argv array */ my_string = strdup(argv[1]); /* debug */ fprintf(stderr, "Argument 1 is %s\n", my_string); process_args(my_string); } There's more code all around, so I can't ask for someone to debug my program -- what I want to know is HOW can I debug why character strings like this are getting their memory changed or overwritten based on unrelated code. Is my memory limited? My stack too small? How do I tell? What else can I do to track down the issue? My program isn't huge, it's like a thousand lines of code give or take and a couple dynamically linked external libs, but nothing out of the ordinary. HELP! TIA!

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  • OsmDroid show blank screen with blocks

    - by Lennie
    Am trying to use OsmDroid with MapQuest maps downloaded from Mobile Atlas Creator. I followed all the instructions to generate the map tiles, upload them to the SDcard etc but when I run this on the device I get a screen with a bunch of empty boxes... What am I doing wrong? > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.osm_map); > mapView = (MapView) findViewById(R.id.mapview); > mapView.setTileSource(TileSourceFactory.MAPQUESTOSM); > mapView.setBuiltInZoomControls(true); > mapView.setUseDataConnection(false); > mapController = mapView.getController(); > mapController.setZoom(15); > } > protected boolean isRouteDisplayed() { > // TODO Auto-generated method stub > return false; > }

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  • Python Pre-testing for exceptions when coverage fails

    - by Tal Weiss
    I recently came across a simple but nasty bug. I had a list and I wanted to find the smallest member in it. I used Python's built-in min(). Everything worked great until in some strange scenario the list was empty (due to strange user input I could not have anticipated). My application crashed with a ValueError (BTW - not documented in the official docs). I have very extensive unit tests and I regularly check coverage to avoid surprises like this. I also use Pylint (everything is integrated in PyDev) and I never ignore warnings, yet I failed to catch this bug before my users did. Is there anything I can change in my methodology to avoid these kind of runtime errors? (which would have been caught at compile time in Java / C#?). I'm looking for something more than wrapping my code with a big try-except. What else can I do? How many other build in Python functions are hiding nasty surprises like this???

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  • AContext.data can be nil?

    - by waza123
    In this code, as you see on Connect, AContext.Data is filled with something TmyTThreadList = class(TThreadList) id: integer; end; var unique_id:integer; procedure TfrmTestIdTCPServer.IdTCPServerConnect(AContext: TIdContext); begin CS.Enter; try inc(unique_id); finally CS.Leave; end; AContext.Data := myTThreadList.Create; list := myTThreadList(AContext.Data).LockList; try myTThreadList(AContext.Data).id := my_unique_id; list.Add(myTThreadList(AContext.Data)); finally myTThreadList(AContext.Data).UnlockList; end; end; then on disconnect, coder is checking here for Acontext.Data < nil procedure TfrmTestIdTCPServer.IdTCPServerDisconnect(AContext: TIdContext); var begin if AContext.Data <> nil then begin The question is, why he is checking for nil ? Thanks. EDIT: I'm asking this, because when I do the same, onExecute I access AContext.Data , and sometimes (when in same time is connecting many clients) AContext.Data is empty, access violation appears.

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  • Django Form Preview

    - by Mark Kecko
    I'm trying to use django's FormPreview and I can't get it to work properly. Here's my code: forms.py class MyForm(forms.ModelForm): status = forms.TypedChoiceField( coerce=int, choices=LIST_STATUS, label="type", widget=forms.RadioSelect ) description = forms.CharField(widget = forms.Textarea) stage = forms.CharField() def __init__(self, useradd=None, *args, **kwargs): super(MyForm, self).__init__(*args, **kwargs) self.fields['firm'].label = "Firm" class Meta: model = MyModel fields = ['status', 'description', 'stage'] class MyFormPreview(FormPreview): form_template = 'templates/post.html' preview_template = 'templates/review.html' def process_preview(self, request, cleaned_data): print "processed" def done(self, request, cleaned_data): print "done" # Do something with the cleaned_data, then redirect # to a "success" page. return HttpResponseRedirect('/') urls.py (r'^post/$', MyFormPreview(MyForm)), post.html <form id = "post_ad" action = "" method = "POST" enctype="multipart/form-data"> <table> {{form.as_table}} </table> <input type="submit" name="save" value="Post" /> </form> When I go to /post/ I get the correct form and I fill it out. When I submit the form it goes right back to /post/ but but there are no errors (I've tried displaying {{errors}}) and the form is empty. None of my print statements execute. I'm not sure what I'm missing. Can anyone help me out? I can't find any documentation besides what's on the django site. Also, what's the "preview" variable called that I should use in my preview.html template? {{preview}} or do I just do {{form}} again? -- Answered below. I tried adding 'django.contrib.formtools' to my installed_apps in settings and I tried using the code from the default form templates from django.contrib as suggested below. Still, when I submit the form I go right back to the post template, none of my print statements execute :(

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  • WatiN NativeElement.GetElementBounds() - What is the unit of measurement?

    - by Brian Schroer
    When I'm testing with WatiN, I like to save screenshots. Sometimes I don't really need a picture of the whole browser window though - I just want a picture of the element that I'm testing. My attempt to save a picture of an element with the code below resulted in a picture of a block box, because elementBounds.Top points to a pixel position way past the bottom of the screen. The elementBounds.Width and .Height values also appear to be about half what they should be. Is this a WatiN bug, or are these properties in a different unit of measure that I have to convert to pixels somehow? public static void SaveElementScreenshot (WatiN.Core.IE ie, WatiN.Core.Element element, string screenshotPath) { ScrollIntoView(ie, element); ie.BringToFront(); var ieClass = (InternetExplorerClass) ie.InternetExplorer; Rectangle elementBounds = element.NativeElement.GetElementBounds(); int left = ieClass.Left + elementBounds.Left; int top = ieClass.Top + elementBounds.Top; int width = elementBounds.Width; int height = elementBounds.Height; using (var bitmap = new Bitmap(width, height)) { using (Graphics graphics = Graphics.FromImage(bitmap)) { graphics.CopyFromScreen (new Point(left, top), Point.Empty, new Size(width, height)); } bitmap.Save(screenshotPath, ImageFormat.Jpeg); } }

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  • c - strncpy issue

    - by Joe
    Hi there, I am getting segmentation fault when using strncpy and (pointer-to-struct)-(member) notation: I have simplified my code. I initialise a struct and set all of it's tokens to an empty string. Then a declare a pointer to a struct and assign the address of the struct to it. I pass the pointer to a function. I can print out the contents of the struct at the beginning of the function, but if I try to use the tp - mnemonic in a strncpy function, I get seg fault. Can anyone tell me what I am doing wrong? typedef struct tok { char* label; char* mnem; char* operand; }Tokens; Tokens* tokenise(Tokens* tp, char* line) { // This prints fine printf("Print this - %s\n", tp -> mnem); // This function gives me segmentation fault strncpy(tp -> mnem, line, 4); return tp; } int main() { char* line = "This is a line"; Tokens tokens; tokens.label = ""; tokens.mnem = "load"; tokens.operand = ""; Tokens* tp = &tokens; tp = tokenise(tp, line); return 0; } I have used printf statements to confirm that the code definitely stops executing at the strncpy function. Can anyone tell me where I am going wrong? Many thanks Joe

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  • Why does my Workflow Service (4.0) variable go null in a DoWhile Activity?

    - by jlafay
    I have a WF service that I'm trying to setup receive activities to "Subscribe" and "Unsubscribe". I'm using This WF Durable Duplex Tutorial as a basis because my service performs callbacks to clients. Basically, think of it as a chat service. I can make client calls to the two receive activities just fine. What happens is the callback address of the client is passed in to Subscribe() on the service. The address is stored as a variable in the WF service and everything looks like it would work as to be expected. When a client calls Unsubscribe(), my watch I have set on the address var during debugging shows it as null. So what gives? Here's the basic setup of my WF service layout... Everything is enveloped in a DoWhile activity. Inside of that is a Pick activity and two Pick branches. The first branch is for subscribing activities. It has a receive-sendreply activity that assigns the string passed by the client to the WF address var. The second branch handles unsubscribing. The trigger is the Request activity and the client address is again passed in. From there it goes into a sequence, starting with an If. It checks to see if the unsubscribeAddress equals the address already subscribed. If it does, then it sets the address to String.Empty and sends a success message back to the client. Why would a variable that's scoped to the enveloping DoWhile activity be implicitly assigned to null? I'm trying to get this to work so I can implement multiple client subscribers from there and work on triggers that invoke callbacks to multiple clients. CONCAT EDIT: I set a breakpoint at the DoWhile level and my var is null once Unsubscribe() is called. When Subscribe() is invoked, the watch shows a value in the var all the way through. Until I Unsubscribe() with a client. Should I be using a While Activity instead?

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  • HttpWebRequest Timeouts After Ten Consecutive Requests

    - by Bob Mc
    I'm writing a web crawler for a specific site. The application is a VB.Net Windows Forms application that is not using multiple threads - each web request is consecutive. However, after ten successful page retrievals every successive request times out. I have reviewed the similar questions already posted here on SO, and have implemented the recommended techniques into my GetPage routine, shown below: Public Function GetPage(ByVal url As String) As String Dim result As String = String.Empty Dim uri As New Uri(url) Dim sp As ServicePoint = ServicePointManager.FindServicePoint(uri) sp.ConnectionLimit = 100 Dim request As HttpWebRequest = WebRequest.Create(uri) request.KeepAlive = False request.Timeout = 15000 Try Using response As HttpWebResponse = DirectCast(request.GetResponse, HttpWebResponse) Using dataStream As Stream = response.GetResponseStream() Using reader As New StreamReader(dataStream) If response.StatusCode <> HttpStatusCode.OK Then Throw New Exception("Got response status code: " + response.StatusCode) End If result = reader.ReadToEnd() End Using End Using response.Close() End Using Catch ex As Exception Dim msg As String = "Error reading page """ & url & """. " & ex.Message Logger.LogMessage(msg, LogOutputLevel.Diagnostics) End Try Return result End Function Have I missed something? Am I not closing or disposing of an object that should be? It seems strange that it always happens after ten consecutive requests. Notes: In the constructor for the class in which this method resides I have the following: ServicePointManager.DefaultConnectionLimit = 100 If I set KeepAlive to true, the timeouts begin after five requests. All the requests are for pages in the same domain. EDIT I added a delay between each web request of between two and seven seconds so that I do not appear to be "hammering" the site or attempting a DOS attack. However, the problem still occurs.

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  • CURL & web.py: transfer closed with outstanding read data remaining

    - by Richard J
    Hi Folks, I have written a web.py POST handler, thus: import web urls = ('/my', 'Test') class Test: def POST(self): return "Here is your content" app = web.application(urls, globals()) if __name__ == "__main__": app.run() When I interact with it using Curl from the command line I get different responses depending on whether I post it any data or not: curl -i -X POST http://localhost:8080/my HTTP/1.1 200 OK Transfer-Encoding: chunked Date: Thu, 06 Jan 2011 16:42:41 GMT Server: CherryPy/3.1.2 WSGI Server Here is your content (Posting of no data to the server gives me back the "Here is your content" string) curl -i -X POST --data-binary "@example.zip" http://localhost:8080/my HTTP/1.1 100 Content-Length: 0 Content-Type: text/plain HTTP/1.1 200 OK Transfer-Encoding: chunked Date: Thu, 06 Jan 2011 16:43:47 GMT Server: CherryPy/3.1.2 WSGI Server curl: (18) transfer closed with outstanding read data remaining (Posting example.zip to the server results in this error) I've scoured the web.py documentation (what there is of it), and can't find any hints as to what might be going on here. Possibly something to do with 100 continue? I tried writing a python client which might help clarify: h1 = httplib.HTTPConnection('localhost:8080') h1.request("POST", "http://localhost:8080/my", body, headers) print h1.getresponse() body = the contents of the example.zip, and headers = empty dictionary. This request eventually timed out without printing anything, which I think exonerates curl from being the issue, so I believe something is going on in web.py which isn't quite right (or at least not sufficiently clear) Any web.py experts got some tips? Cheers, Richard

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  • executing stored procedure from Spring-Hibernate using Annotations

    - by HanuAthena
    I'm trying to execute a simple stored procedure with Spring/Hibernate using Annotations. Here are my code snippets: DAO class: public class UserDAO extends HibernateDaoSupport { public List selectUsers(final String eid){ return (List) getHibernateTemplate().execute(new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query q = session.getNamedQuery("SP_APPL_USER"); System.out.println(q); q.setString("eid", eid); return q.list(); } }); } } my entity class: @Entity @Table(name = "APPL_USER") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorFormula(value = "SUBSCRIBER_IND") @DiscriminatorValue("N") @NamedQuery(name = "req.all", query = "select n from Requestor n") @org.hibernate.annotations.NamedNativeQuery(name = "SP_APPL_USER", query = "call SP_APPL_USER(?, :eid)", callable = true, readOnly = true, resultClass = Requestor.class) public class Requestor { @Id @Column(name = "EMPL_ID") public String getEmpid() { return empid; } public void setEmpid(String empid) { this.empid = empid; } @Column(name = "EMPL_FRST_NM") public String getFirstname() { return firstname; } ... } public class Test { public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext( "applicationContext.xml"); APFUser user = (APFUser)ctx.getBean("apfUser"); List selectUsers = user.getUserDAO().selectUsers("EMP456"); System.out.println(selectUsers); } } and the stored procedure: create or replace PROCEDURE SP_APPL_USER (p_cursor out sys_refcursor, eid in varchar2) as empId varchar2(8); fname varchar2(50); lname varchar2(50); begin empId := null; fname := null; lname := null; open p_cursor for select l.EMPL_ID, l.EMPL_FRST_NM, l.EMPL_LST_NM into empId, fname, lname from APPL_USER l where l.EMPL_ID = eid; end; If i enter invalid EID, its returning empty list which is OK. But when record is there, following exception is thrown: Exception in thread "main" org.springframework.jdbc.BadSqlGrammarException: Hibernate operation: could not execute query; bad SQL grammar [call SP_APPL_USER(?, ?)]; nested exception is java.sql.SQLException: Invalid column name Do I need to modify the entity(Requestor.class) ? How will the REFCURSOR be converted to the List? The stored procedure is expected to return more than one record.

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  • debugging finite state machine spell checker code

    - by Durell
    I need someone to debug the lines of c++ code I wrote below so it can run. It is intended to spell check the word "and" using state to state transition. include include using namespace std; string in_str; int n; void spell_check() { int i; FILE *in_file; while (!EOF(in_file)) { fscanf(in_str); n = strlen(in_str); start(in_str,n); } } void start() { char next_char; int i = 0; if (n == 0) { cout<<"This is an empty string"; exit();//do something here to terminate the program } else{ next_char = in_str[i]; if(next_char == 'a') { i++; if(i >= n) error(); else state_A(i); } else error(); } } void state_A(int i) { if(in_str[i] == 'n') { i++; if(i void state_AN(int i) { if(in_str[i] == 'd') { if(i == n-1) cout<<" Your keyword spelling is correct"; else cout<<"Wrong keyword spelling"; } } int main() { spell_check(); return 0; }

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  • Problems running Ruby on Rails apps on shared hosted server

    - by Evgeny
    I have problems installing any Ruby On Rails app on my shared hosted server. Mongrel shows html as plain text for all pages. The problem occurs for any app, even if I create a test empty app and add a scaffolded view without changing anything. It appears that the Mongrel crashes when trying to put cookies to the response header. The HTTP header looks incomplete, the Content-type and other parameters are missing: curl 127.0.0.1:12002/users -I HTTP/1.1 200 OK Connection: close Date: Wed, 26 May 2010 09:46:50 GMT Content-Length: 0 Here is the output from mongrel.log Error calling Dispatcher.dispatch #<NoMethodError: You have a nil object when you didn't expect it! You might have expected an instance of ActiveRecord::Base. The error occurred while evaluating nil.[]> /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/cgi.rb:108:in `send_cookies' /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/cgi.rb:136:in `out' /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/http_response.rb:65:in `start' ruby 1.8.7 rails 2.3.8 mongrel 1.1.5 Here is the link to the test page. Has anyone seen anything like this?

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  • Method binding to base method in external library can't handle new virtual methods "between"

    - by Berg
    Lets say I have a library, version 1.0.0, with the following contents: public class Class1 { public virtual void Test() { Console.WriteLine( "Library:Class1 - Test" ); Console.WriteLine( "" ); } } public class Class2 : Class1 { } and I reference this library in a console application with the following contents: class Program { static void Main( string[] args ) { var c3 = new Class3(); c3.Test(); Console.ReadKey(); } } public class Class3 : ClassLibrary1.Class2 { public override void Test() { Console.WriteLine("Console:Class3 - Test"); base.Test(); } } Running the program will output the following: Console:Class3 - Test Library:Class1 - Test If I build a new version of the library, version 2.0.0, looking like this: public class Class1 { public virtual void Test() { Console.WriteLine( "Library:Class1 - Test V2" ); Console.WriteLine( "" ); } } public class Class2 : Class1 { public override void Test() { Console.WriteLine("Library:Class2 - Test V2"); base.Test(); } } and copy this version to the bin folder containing my console program and run it, the results are: Console:Class3 - Test Library:Class1 - Test V2 I.e, the Class2.Test method is never executed, the base.Test call in Class3.Test seems to be bound to Class1.Test since Class2.Test didn't exist when the console program was compiled. This was very surprising to me and could be a big problem in situations where you deploy new versions of a library without recompiling applications. Does anyone else have experience with this? Are there any good solutions? This makes it tempting to add empty overrides that just calls base in case I need to add some code at that level in the future...

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  • MSCRM 4 Convert Standard enitity to Custom entity using InitializeFromRequest

    - by user363727
    Hi there, I'm trying to convert an order and orderdetail lines to a custom entity and its child lines using InitializeFromRequest using the code below: public void Convert(Guid FromEntityId, string FromEntityName, string ToEntityName) { try { // Set up the CRM Service. CrmService _service = GetCrmService(); InitializeFromRequest req = new InitializeFromRequest(); req.EntityMoniker = new Moniker(); // this is the very thing that does the job. req.EntityMoniker.Id = FromEntityId; req.EntityMoniker.Name = FromEntityName; req.TargetEntityName = ToEntityName; //contact for our example req. req.TargetFieldType = TargetFieldType.ValidForCreate; InitializeFromResponse rps = (InitializeFromResponse)_service.Execute(req); //now the lead is converted to a contact, and you can see it in contacts. Guid entityId = _service.Create(rps.Entity); lblMsg.Text = "Done ID:" + entityId.ToString(); } catch (System.Web.Services.Protocols.SoapException se) { lblMsg.Text = "soap:" + se.Detail.InnerText; } catch (Exception ex) { lblMsg.Text = ex.Message; } } Now i am able to get a custom entity created but all the attributes are empty despite me setting the mapping fields in the realtionship. Any ideas on what i am missing or doing wrong? Thanks in advance Andrew

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  • rich:tabPanel and problems when filed has required="true"

    - by JQueryNeeded
    Hello, Let's consider following, simplified example: we have 2 tabs withing , each tab has and at the moment we want to switch from one tab to another, and the inputText is empty (we dont want to submit value from it anyway, we want to go to another tab) we get "Validation Error: Value is required." the example code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:a4j="http://richfaces.org/a4j" xmlns:rich="http://richfaces.org/rich" > <a4j:form id="mainForm" reRender="mainForm" ajaxSubmit="true" > <rich:tabPanel switchType="ajax"> <rich:tab label="TabA" > <a4j:region> <h:outputText value="Tab A content" /> <h:inputText value="" required="true" /> </a4j:region> </rich:tab> <rich:tab label="TabB"> <a4j:region> <h:outputText value="Tab B content" /> <h:inputText value="" required="true" /> </a4j:region> </rich:tab> </rich:tabPanel> <rich:messages /> </a4j:form> </html>

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  • Changing customErrors in web.config semi-dynamically

    - by Tom Ritter
    The basic idea is we have a test enviroment which mimics Production so customErrors="RemoteOnly". We just built a test harness that runs against the Test enviroment and detects breaks. We would like it to be able to pull back the detailed error. But we don't want to turn customErrors="On" because then it doesn't mimic Production. I've looked around and thought a lot, and everything I've come up with isn't possible. Am I wrong about any of these points? We can't turn customErrors on at runtime because when you call configuration.Save() - it writes the web.config to disk and now it's Off for every request. We can't symlink the files into a new top level directory with it's own web.config because we're on windows and subversion on windows doesn't do symlinks. We can't use URL-Mapping to make an empty folder dir2 with its own web.config and make the files in dir1 appear to be in dir2 - the web.config doesn't apply We can't copy all the aspx files into dir2 with it's own web.config because none of the links would be consistent and it's a horrible hacky solution. We can't change customErrors in web.config based on hostname (e.g. add another dns entry to the test server) because it's not possible/supported We can't do any virtual directory shenanigans to make it work. If I'm not, is there a way to accomplish what I'm trying to do? Turn on customErrors site-wide under certain circumstances (dns name or even a querystring value)?

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  • WordPress Conditional: Only show if current page title is equal to post meta

    - by Wade D Ouellet
    Hey, I am calling a bunch of posts under a certain post type in WordPress which works but I am trying to add a conditional that will check first if those post's custom meta field (labeled "disc") is equal to the current post's title. Here is what I have but this conditional does not seem to work: <?php $pages = get_posts('numberposts=9999&post_type=song&post_status=publish&order=ASC&orderby=date'); $i = 1; foreach( $pages as $page ) { $content = $page->post_title; if( empty($content) ) continue; $content = apply_filters('the_content', $content); ?> <?php if(get_post_meta($page->ID, "p30-disc", true)=="the_title()") { ?> <tbody class="vevent"> <?php if ($i%2===0) { ?><tr class="gigpress-row gigpress-alt"> <?php } else { ?><tr class="gigpress-row"><?php } ?> <td><?php echo $page->post_title ?></td> <td><?php echo get_post_meta($page->ID, "p30-length", true); ?></td> <td><a href="http://itunes.com/<?php echo get_post_meta($page->ID, "p30-itunes-song", true); ?>">BUY</a></td> </tr> <tr class="gigpress-info"> <td colspan="3"><?php echo $page->post_content ?></td> </tr> </tbody> <?php $i++; } } ?> When I simply echo "get_post_meta($page-ID, "p30-disc", true)" or "the_title()" it spits out their proper values, which are equal, so obviously something is just wrong with that conditional. Thanks, Wade

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  • How to display image within cell boundary

    - by Jessy
    How can I place an image within the cell boundary? I mean without taking the space of other cell? In the code below, random cells were selected to display images. One image in one cell. The problem is that, the image seems to take other cells as well. ... setPreferredSize(new Dimension(600,600)); final int ROWS = 6; final int COLS = 6; final int IMAGES = 10; setLayout(new GridBagLayout()); GridBagConstraints gc = new GridBagConstraints(); gc.weightx = 1d; gc.weighty = 1d; gc.insets = new Insets(0, 0, 0, 0);//top, left, bottom, and right gc.fill = GridBagConstraints.NONE; JLabel[][] label = new JLabel[ROWS][COLS]; Random rand = new Random(); // fill the panel with labels for (int i=0;i<IMAGES;i++){ ImageIcon icon = createImageIcon("myImage.jpg"); int r, c; do{ //pick random cell which is empty to avoid overlap image in the same cell r = (int)Math.floor(Math.random() * ROWS); c = (int)Math.floor(Math.random() * COLS); } while (label[r][c]!=null); //scale the image int x = rand.nextInt(20)+30; int y = rand.nextInt(20)+30; Image image = icon.getImage().getScaledInstance(x,y, Image.SCALE_SMOOTH); icon.setImage(image); JLabel lbl = new JLabel(icon); gc.gridx = r; gc.gridy = c; add(lbl, gc); //add image to the cell label[r][c] = lbl; }

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  • How to display image within cell boundary

    - by Jessy
    How can I place an image within the cell boundary? I mean without taking the space of other cell? In the code below, random cells were selected to display images. One image in one cell. The problem is that, the image seems to take other cells as well. ... setPreferredSize(new Dimension(600,600)); final int ROWS = 6; final int COLS = 6; final int IMAGES = 10; setLayout(new GridBagLayout()); GridBagConstraints gc = new GridBagConstraints(); gc.weightx = 1d; gc.weighty = 1d; gc.insets = new Insets(0, 0, 0, 0);//top, left, bottom, and right gc.fill = GridBagConstraints.NONE; JLabel[][] label = new JLabel[ROWS][COLS]; Random rand = new Random(); // fill the panel with labels for (int i=0;i<IMAGES;i++){ ImageIcon icon = createImageIcon("myImage.jpg"); int r, c; do{ //pick random cell which is empty to avoid overlap image in the same cell r = (int)Math.floor(Math.random() * ROWS); c = (int)Math.floor(Math.random() * COLS); } while (label[r][c]!=null); //scale the image int x = rand.nextInt(20)+30; int y = rand.nextInt(20)+30; Image image = icon.getImage().getScaledInstance(x,y, Image.SCALE_SMOOTH); icon.setImage(image); JLabel lbl = new JLabel(icon); gc.gridx = r; gc.gridy = c; add(lbl, gc); //add image to the cell label[r][c] = lbl; }

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  • WPF ValidationRule Validate when the control is loaded

    - by PaN1C_Showt1Me
    Hi ! I have a control with this validation <MyPicker.SelectedItem> <Binding Path="Person.Value" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged" NotifyOnValidationError="True"> <Binding.ValidationRules> <rules:MyValidationRule ValidationType="notnull"/> </Binding.ValidationRules> </Binding> </MyPicker.SelectedItem> This is the Validation Class: class MyValidationRule : ValidationRule { private string _validationType; public string ValidationType { get { return _validationType; } set { _validationType = value; } } public override ValidationResult Validate(object value, CultureInfo cultureInfo) { ValidationResult trueResult = new ValidationResult(true, null); switch (_validationType.ToLower()) { case "notnull": return value == null ? new ValidationResult(false, "EMPTY FIELD") : trueResult; default: return trueResult; } } } Question: When the property is changed, then the Validate( ) method is called which is correct. But to call this method at the very beginning when the MyControl is created? I need to prove immediate after initialize if the there's a null value in the control (and display a validation error)

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  • Dynamically create a text file from a C# program

    - by techstu
    Can I dynamically create a text file from a C# program, using data from a previously created xml file and text file, I have written half the code, but can't go any further please help using System; using System.IO; using System.Xml; namespace Task3 { class TextFileReader { static void Main(string[] args) { String strn=" ", strsn=String.Empty; XmlTextReader reader = new XmlTextReader("my.xml"); while (reader.Read()) { switch (reader.NodeType) { case XmlNodeType.Element: // The node is an element. if (reader.HasAttributes) { strn = reader.GetAttribute(0); strsn = reader.GetAttribute(1); int counter = 0; string line; // Read the file and display it line by line. System.IO.StreamReader file = new System.IO.StreamReader("read_file.txt"); string ch, ch1; while ((line = file.ReadLine()) != null) { if (line.Substring(0, 1).Equals("%")) { int a = line.IndexOf('%'); int b = line.LastIndexOf('%'); ch = line.Substring(a + 1, b - 1); ch1 = line.Substring(a, b+1); if (ch == "name") { string test = line.Replace(ch1, strn); Console.WriteLine(test); } else if (ch == "sirname") { string test = line.Replace(ch1, strsn); Console.WriteLine(test); } } else { Console.WriteLine(line); } counter++; } file.Close(); } break; } } // Suspend the screen. Console.ReadLine(); } } } the xml file from which i am reading is: <?xml version="1.0" encoding="utf-8" ?> - <Workflow> <User UserName="pqr" Sirname="sbd" /> <User UserName="abc" Sirname="xyz" /> </Workflow> and the text file is: hi this is me %sirname% %name% but this is not wat i want..please help

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  • Importing a WebService:

    - by Pierre
    Hi all, I'm trying to import the following web service: http://www.biomart.org/biomart/martwsdl Using curl for the service getResistry() : everything is OK: curl --header 'Content-Type: text/xml' --data '<?xml version="1.0"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:mar="http://www.biomart.org:80/MartServiceSoap"> <soapenv:Header/> <soapenv:Body> <mar:getRegistry/> </soapenv:Body> </soapenv:Envelope>' http://www.biomart.org:80/biomart/martsoap it returns: <?xml version="1.0" encoding="UTF-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soapenc="http://schemas.xmlsoap.o rg/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/ envelope/" soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <soap:Body> <getRegistryResponse xmlns="http://www.biomart.org:80/MartServiceSoap"> <mart> <name xsi:type="xsd:string">ensembl</name> <displayName xsi:type="xsd:string">ENSEMBL GENES 57 (SANGER UK)</displayName> <database xsi:type="xsd:string">ensembl_mart_57</database> (...) OK. But when this service is generated using CXF/wsdl2java ( or even wsimport) mkdir src wsdl2java -keep -d src -client "http://www.biomart.org/biomart/martwsdl" javac -g -d src -sourcepath src src/org/biomart/_80/martservicesoap/MartServiceSoap_BioMartSoapPort_Client.java java -cp src org.biomart._80.martservicesoap.MartServiceSoap_BioMartSoapPort_Client the generated client returns an empty list for getRegistry(): Invoking getRegistry... getRegistry.result=[] why ? what should I do, to make this code work ? Many thanks Pierre

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  • Can I copy/clone a function in JavaScript?

    - by Craig Stuntz
    I'm using jQuery with the validators plugin. I would like to replace the "required" validator with one of my own. This is easy: jQuery.validator.addMethod("required", function(value, element, param) { return myRequired(value, element, param); }, jQuery.validator.messages.required); So far, so good. This works just fine. But what I really want to do is call my function in some cases, and the default validator for the rest. Unfortunately, this turns out to be recursive: jQuery.validator.addMethod("required", function(value, element, param) { // handle comboboxes with empty guids if (someTest(element)) { return myRequired(value, element, param); } return jQuery.validator.methods.required(value, element, param); }, jQuery.validator.messages.required); I looked at the source code for the validators, and the default implementation of "required" is defined as an anonymous method at jQuery.validator.messages.required. So there is no other (non-anonymous) reference to the function that I can use. Storing a reference to the function externally before calling addMethod and calling the default validator via that reference makes no difference. What I really need to do is to be able to copy the default required validator function by value instead of by reference. But after quite a bit of searching, I can't figure out how to do that. Is it possible? If it's impossible, then I can copy the source for the original function. But that creates a maintenance problem, and I would rather not do that unless there is no "better way."

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  • How can I place validating constraints on my method input parameters?

    - by rcampbell
    Here is the typical way of accomplishing this goal: public void myContractualMethod(final String x, final Set<String> y) { if ((x == null) || (x.isEmpty())) { throw new IllegalArgumentException("x cannot be null or empty"); } if (y == null) { throw new IllegalArgumentException("y cannot be null"); } // Now I can actually start writing purposeful // code to accomplish the goal of this method I think this solution is ugly. Your methods quickly fill up with boilerplate code checking the valid input parameters contract, obscuring the heart of the method. Here's what I'd like to have: public void myContractualMethod(@NotNull @NotEmpty final String x, @NotNull final Set<String> y) { // Now I have a clean method body that isn't obscured by // contract checking If those annotations look like JSR 303/Bean Validation Spec, it's because I borrowed them. Unfortunitely they don't seem to work this way; they are intended for annotating instance variables, then running the object through a validator. Which of the many Java design-by-contract frameworks provide the closest functionality to my "like to have" example? The exceptions that get thrown should be runtime exceptions (like IllegalArgumentExceptions) so encapsulation isn't broken.

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