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  • js works inside the page but not in code behind

    - by Cristian Boariu
    Hi guys, I have this function put in a MasterPage, which shows up an mp3 player: <script type="text/javascript"> $(document).ready(function() { var stageW = 500; var stageH = 216; var cacheBuster = Date.parse(new Date()); var flashvars = {}; var params = {}; params.bgcolor = '#F6F6F6'; params.allowfullscreen = 'true'; flashvars.stageW = stageW; flashvars.stageH = stageH; flashvars.pathToFiles = ''; flashvars.settingsPath = '../mp3player/mp3player_settings.xml'; flashvars.xmlPath = '<%# getRestXmlPlayerUrl() %>'; flashvars.keepSelected = 't'; flashvars.selectedWindow = '4'; flashvars.slideshow = 't'; flashvars.imageWidth = '130'; flashvars.imageHeight = '130'; swfobject.embedSWF('swf/preview.swf?t=' + cacheBuster, 'myContent', stageW, stageH, '9.0.124', 'swf/expressInstall.swf', flashvars, params); }); </script> All works great. But, because i have some ajax on the page with update panel, the flash in not rendered when ajax requests occurs so i need to register this function and i've tried something like this: protected void Page_PreRender(object sender, EventArgs e) { Type cstype = this.GetType(); String csnameForPlayer = "applyStyleToMp3Player"; if (!Page.ClientScript.IsClientScriptBlockRegistered(cstype, csnameForPlayer)) { StringBuilder cstextForPlayer = new StringBuilder(); cstextForPlayer.Append(" $(document).ready(function() { " + " var stageW = 500;" + " var stageH = 216;" + " var cacheBuster = Date.parse(new Date());" + " var flashvars = {};" + " var params = {};" + " params.bgcolor = '#F6F6F6';" + " params.allowfullscreen = 'true';" + " flashvars.stageW = stageW;" + " flashvars.stageH = stageH;" + " flashvars.pathToFiles = '';" + " flashvars.settingsPath = '../mp3player/mp3player_settings.xml';" + " flashvars.xmlPath = '<%# getRestXmlPlayerUrl() %>';" + " flashvars.keepSelected = 't';" + " flashvars.selectedWindow = '4';" + " flashvars.slideshow = 't';" + " flashvars.imageWidth = '130';" + " flashvars.imageHeight = '130';" + " swfobject.embedSWF('swf/preview.swf?t=' + cacheBuster, 'myContent', stageW, stageH, '9.0.124', 'swf/expressInstall.swf', flashvars, params);" + "}); "); ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), csnameForPlayer, cstextForPlayer.ToString(), true); } } Well, this does not work. The flash player does not appear any more, so, i assume that is something wrong in the cstextForPlayer. I've spent over one hour to figure it out but i've failed. Does anyone see the problem? Thanks in advance.

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  • Writing to a comet stream using tomcat 6.0

    - by user301247
    Hey I'm new to java servlets and I am trying to write one that uses comet so that I can create a long polling Ajax request. I can successfully start the stream and perform operations but I can't write anything out. Here is my code: public class CometTestServlet extends HttpServlet implements CometProcessor { /** * */ private static final long serialVersionUID = 1070949541963627977L; private MessageSender messageSender = null; protected ArrayList<HttpServletResponse> connections = new ArrayList<HttpServletResponse>(); public void event(CometEvent cometEvent) throws IOException, ServletException { HttpServletRequest request = cometEvent.getHttpServletRequest(); HttpServletResponse response = cometEvent.getHttpServletResponse(); //final PrintWriter out = response.getWriter(); if (cometEvent.getEventType() == CometEvent.EventType.BEGIN) { PrintWriter writer = response.getWriter(); writer.println("<!doctype html public \"-//w3c//dtd html 4.0 transitional//en\">"); writer.println("<head><title>JSP Chat</title></head><body bgcolor=\"#FFFFFF\">"); writer.println("</body></html>"); writer.flush(); cometEvent.setTimeout(10 * 1000); //cometEvent.close(); } else if (cometEvent.getEventType() == CometEvent.EventType.ERROR) { log("Error for session: " + request.getSession(true).getId()); synchronized(connections) { connections.remove(response); } cometEvent.close(); } else if (cometEvent.getEventType() == CometEvent.EventType.END) { log("End for session: " + request.getSession(true).getId()); synchronized(connections) { connections.remove(response); } PrintWriter writer = response.getWriter(); writer.println("</body></html>"); cometEvent.close(); } else if (cometEvent.getEventType() == CometEvent.EventType.READ) { //handleReadEvent(cometEvent); InputStream is = request.getInputStream(); byte[] buf = new byte[512]; do { int n = is.read(buf); //can throw an IOException if (n > 0) { log("Read " + n + " bytes: " + new String(buf, 0, n) + " for session: " + request.getSession(true).getId()); } else if (n < 0) { //error(cometEvent, request, response); return; } } while (is.available() > 0); } } Any help would be appreciated.

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  • JavaCC: How can one exclude a string from a token? (A.k.a. understanding token ambiguity.)

    - by java.is.for.desktop
    Hello, everyone! I had already many problems with understanding, how ambiguous tokens can be handled elegantly (or somehow at all) in JavaCC. Let's take this example: I want to parse XML processing instruction. The format is: "<?" <target> <data> "?>": target is an XML name, data can be anything except ?>, because it's the closing tag. So, lets define this in JavaCC: (I use lexical states, in this case DEFAULT and PROC_INST) TOKEN : <#NAME : (very-long-definition-from-xml-1.1-goes-here) > TOKEN : <WSS : (" " | "\t")+ > // WSS = whitespaces <DEFAULT> TOKEN : {<PI_START : "<?" > : PROC_INST} <PROC_INST> TOKEN : {<PI_TARGET : <NAME> >} <PROC_INST> TOKEN : {<PI_DATA : ~[] >} // accept everything <PROC_INST> TOKEN : {<PI_END : "?>" > : DEFAULT} Now the part which recognizes processing instructions: void PROC_INSTR() : {} { ( <PI_START> (t=<PI_TARGET>){System.out.println("target: " + t.image);} <WSS> (t=<PI_DATA>){System.out.println("data: " + t.image);} <PI_END> ) {} } Let's test it with <?mytarget here-goes-some-data?>: The target is recognized: "target: mytarget". But now I get my favorite JavaCC parsing error: !! procinstparser.ParseException: Encountered "" at line 1, column 15. !! Was expecting one of: !! Encountered nothing? Was expecting nothing? Or what? Thank you, JavaCC! I know, that I could use the MORE keyword of JavaCC, but this would give me the whole processing instruction as one token, so I'd had to parse/tokenize it further by myself. Why should I do that? Am I writing a parser that does not parse? The problem is (i guess): hence <PI_DATA> recognizes "everything", my definition is wrong. I should tell JavaCC to recognize "everything except ?>" as processing instruction data. But how can it be done? NOTE: I can only exclude single characters using ~["a"|"b"|"c"], I can't exclude strings such as ~["abc"] or ~["?>"]. Another great anti-feature of JavaCC. Thank you.

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  • Passing array into constructor to use on JList

    - by OVERTONE
    I know the title sound confusing and thats because it is. its a bit long so try too stay with me. this is the layout i have my code designed variables constructor methods. im trying too fill a Jlist full on names. i want too get those names using a method. so here goes. in my variables i have my JList. its called contactNames; i also have an array which stores 5 strings which are the contacts names; heres the code for that anyway String contact1; String contact2; String contact3; String contact4; String contact5; String[] contactListNames; JList contactList; simple enough. then in my constructor i have the Jlist defined to fill itself with the contents of the array fillContactList(); JList contactList = new JList(contactListNames); that method fillContactList() is coming up shortly. notice i dont have the array defined in the constructor. so heres my first question. can i do that? define the array to contain something in te constructor rather than filling it fromt the array. now heres where stuff gets balls up. ive created three different methods all of which havent worked. basically im trying to fill the array with all of them. this is the simplest one. it doesnt set the Jlist, it doesnt do anything compilicated. all it trys too do is fill the array one bit at a time public void fillContactList() { for(int i = 0;i<3;i++) { try { String contact; System.out.println(" please fill the list at index "+ i); Scanner in = new Scanner(System.in); contact = in.next(); contactListNames[i] = contact; in.nextLine(); } catch(Exception e) { e.printStackTrace(); } } } unfortunately this doesnt qwork. i get the print out to fill it at index 0; i input something and i get a nice big stack trace starting at contactListNames[i] = contact; so my two questions in short are how i define an array in a constructor. and why cant i fill the array from that method. ************************888 **************************888 stack trace by request please fill the list at index 0 overtone java.lang.NullPointerException please fill the list at index 1 at project.AdminMessages.fillContactList(AdminMessages.java:408) at project.AdminMessages.<init>(AdminMessages.java:88) at project.AdminUser.createAdminMessages(AdminUser.java:32) at project.AdminUser.<init>(AdminUser.java:18) at project.AdminUser.main(AdminUser.java:47) it was a null poiinter exception

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  • WPF/C#: How to simplify the use of codes when calling a function (Generating Images)

    - by eibhrum
    I created a function in one of my application that allows to generate an image (in WPF) by getting the 'source path' from the database that I am using: public void ShowImageThumb() { try { cn = new MySqlConnection(); cn.ConnectionString = ConfigurationManager.AppSettings["MyConnection"]; cn.Open(); MySqlCommand cmd = new MySqlCommand(); cmd.Connection = cn; cmd.CommandType = CommandType.Text; cmd.CommandText = "SELECT thumb FROM album WHERE thumbNo=1"; MySqlDataAdapter adp = new MySqlDataAdapter(); adp.SelectCommand = cmd; DataTable dt = new DataTable(); adp.Fill(dt); MySqlDataReader r = cmd.ExecuteReader(); while (r.Read()) { BitmapImage bmi1 = new BitmapImage(new Uri(r[0].ToString(), UriKind.Relative)); image1.Source = bmi1; } r.Close(); cn.Close(); } catch (Exception err){ System.Windows.MessageBox.Show(err.Message); } finally { } } Take a look on my SQL statement. I put a WHERE thumbNo=1 which allows the function to get 1 record. You see, I do have at least 10 records - file paths listed in that table. I just wanna ask if there's a possible way to make my SQL statement something like this: SELECT thumb FROM album; while having this piece of code inserted in my function: BitmapImage bmi2 = new BitmapImage(new Uri(r["second record?"].ToString(), UriKind.Relative)); image2.Source = bmi2; //something like this BitmapImage bmi3 = new BitmapImage(new Uri(r["third record?"].ToString(), UriKind.Relative)); image3.Source = bmi3; //something like this and so on and so forth, without ending up creating 10 different functions for 10 records. ShowImageThumb2(); . . // will not do this . ShowImageThumb10(); Sorry for the lengthy post. I hope somebody could answer back. Thanks!

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  • iPhone Development: Use POST to submit a form

    - by Mario
    I've got the following html form: <form method="post" action="http://shk.ecomd.de/up.php" enctype="multipart/form-data"> <input type="hidden" name="id" value="12345" /> <input type="file" name="pic" /> <input type="submit" /> </form> And the following iPhone SDK Submit method: - (void)sendfile { UIImage *tempImage = [UIImage imageNamed:@"image.jpg"]; NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; [request setHTTPMethod:@"POST"]; [request setURL:[NSURL URLWithString:@"http://url..../form.php"]]; NSString *boundary = @"------------0xKhTmLbOuNdArY"; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; NSMutableData *body = [NSMutableData data]; [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; [body appendData:[@"Content-Disposition: form-data; name=\"id\"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; [body appendData:[@"12345" dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"\r\n%@\r\n",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; [body appendData:[@"Content-Disposition: form-data; name=\"pic\"; filename=\"photo.png\"\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding]]; [body appendData:[NSData dataWithData:UIImageJPEGRepresentation(tempImage, 90)]]; [body appendData:[[NSString stringWithFormat:@"\r\n%@",boundary] dataUsingEncoding:NSASCIIStringEncoding]]; // setting the body of the post to the reqeust [request setHTTPBody:body]; NSError *error; NSURLResponse *response; NSData* result = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSString* aStr = [[[NSString alloc] initWithData:result encoding:NSASCIIStringEncoding] autorelease]; NSLog(@"Result: %@", aStr); [request release]; } This does not work, but I have no clue why. Can you please help me?!! What am I doing wrong?

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  • response.redirect to classic asp failing {Unable to evaluate expression because the code is optimize

    - by jeff
    I have the following code pasted below. For some reason, the response.redirect seems to be failing and it is maxing out the cpu on my server and just doesn't do anything. The .net code uploads the file fine, but does not redirect to the asp page to do the processing. I know this is absolute rubbish why would you have .net code redirecting to classic asp, it is a legacy app. I have tried putting false or true etc. at the end of the redirect as I have read other people have had issues with this. Please help as it's driving me insane! It's so strange, it runs locally on my machine but won't run on my server! I am getting the following error when I debugged remotely. {Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.} (UPDATED) After debugging remotely and taking the redirect out of the try catch, I have found that the redirect is trying to get to the correct location but after it leaves the redirect is just seems to get lost. (almost as if it can't navigate away from the cobra_import project) back up a level to COBRA/pages. Why is this??? This has worked previously!!! public void btnUploadTheFile_Click(object Source, EventArgs evArgs) { //need to check that the uploaded file is an xls file. string strFileNameOnServer = "PJI3.txt"; string strBaseLocation = ConfigurationSettings.AppSettings["str_file_location"]; if ("" == strFileNameOnServer) { txtOutput.InnerHtml = "Error - a file name must be specified."; return; } if (null != uplTheFile.PostedFile) { try { uplTheFile.PostedFile.SaveAs(strBaseLocation+strFileNameOnServer); txtOutput.InnerHtml = "File <b>" + strBaseLocation+strFileNameOnServer+"</b> uploaded successfully"; Response.Redirect ("/COBRA/pages/sap_import_pji3_prc.asp"); } catch (Exception e) { txtOutput.InnerHtml = "Error saving <b>" + strBaseLocation+strFileNameOnServer+"</b><br>"+ e.ToString(); } } }

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  • What is the best way, if possible, to send information from a Java PrintStream to a JTextPane?

    - by Daniel Reeves
    In Java, I have a package that translates XML metadata from one standard to another. This package is ultimately accessed through a single function and sends all of its output through a PrintStream object. The output sent is just a status of each file and whether or not it was translated. This is pretty fine and dandy if I'm just printing to System.out, but I'm actually wanting to print this to a JTextPane while it translates (kind of like a progress text box). It wouldn't be a big deal to just print the status after it was done translating the XML, but since there may be thousands of XML files, that's just not feasible. One thing that I've tried is to use a thread that takes all of the information from the PrintStream (which is attached to a ByteArrayOutputStream) and let it send any new information to the text pane. Unfortunately, this still sends the information all at once at the end of the translation. This does work correctly for System.out. Here's the code that does the translation and tries to show the output: public class ConverterGUI extends javax.swing.JFrame { boolean printToResultsBox = false; PrintStream printStream = null; ByteArrayOutputStream baos = null; private class ResultsPrinter implements Runnable { public ResultsPrinter() { baos = new ByteArrayOutputStream(); printStream = new PrintStream(baos); } public void run() { String tempString = ""; while (printToResultsBox) { try { if (!baos.toString().equals(tempString)) { tempString = baos.toString(); resultsBox.setText(tempString); } } catch (Exception ex) { } } } } ... ResultsPrinter rp = new ResultsPrinter(); Thread thread = new Thread(rp); thread.start(); // Do the translation. try { printToResultsBox = true; boolean success = false; TranslationEngine te = new TranslationEngine(); // fileOrFolderToConvert is a text box in the GUI. // linkNeeded and destinationFile are just parameters for the translation process. success = te.translate(fileOrFolderToConvert.getText(), linkNeeded, destinationFile, printStream); if (success) { printStream.println("File/folder translation was a success."); } resultsBox.setText(baos.toString()); } catch (Exception ex) { printStream.println("File translation failed."); } finally { printToResultsBox = false; } ... } Ultimately, this code prints out to the JTextPane just fine after all the translation is done but not during. Any suggestions? Do I need to change the PrintStream to something else?

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  • How to play small sound file continuously in Silverlight?

    - by ash
    Hello, I have two questions regarding Silverlight's SoundPlay action and properties. My scenario is like: I have two story board: The first story board has an image and a sound file; when the silverlight application gets loaded, the sound starts to play automatically, but if someone clicks the image, the sound file will stop and the second storyboard will start with a new sound file. 1) My first question is how to stop the first sound file of first story board when the second story board starts with the second sound file. 2) My second question is how to play a sound file continuously; for example, in Silverlight we can play a story board continuously with RepeatBehavior="Forever"; but I cannot find a way to play my 10 second sound file forever or continuously. Note: I have attached a small XAML file to show what I am talking about; I am also stating that if instead of an image file, if there were a button, then I can stop the first music file after I click the button and start my second story board with a new sound file, but I would like to use image file instead of a button. Is it possible? If it is, how to do it? Therefore, please answer my following two questions or give big hint or website tutorial links on 1) How to stop the first sound file of first story board when the second story board starts with the second sound file ( When the clickable element is an image instead of a button) 2) How to play a 10 second sound file continuously? ............Code Snippet...................... XAML ............ <Grid x:Name="LayoutRoot" Background="Red"> <Button HorizontalAlignment="Left" Margin="212,0,0,111" VerticalAlignment="Bottom" Width="75" Content="Button" Click="onClick"/> <MediaElement x:Name="sound2_mp3" Height="0" HorizontalAlignment="Left" Margin="105,230,0,0" VerticalAlignment="Top" Width="0" Source="/sound2.mp3" Stretch="Fill"/> <MediaElement x:Name="sound1_mp1" Height="0" HorizontalAlignment="Left" Margin="190,164,0,0" VerticalAlignment="Top" Width="0" Source="/sound1.mp3" Stretch="Fill" AutoPlay="False"/> </Grid> ..................................................................................................................................................................................................................... using System; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace testPrj { public partial class MainPage : UserControl { public MainPage() { // Required to initialize variables InitializeComponent(); } private void onClick(object sender, System.Windows.RoutedEventArgs e) { Storyboard1.Stop(); sound2_mp3.Stop(); sound1_mp1.Play(); } } } ...................................................................................................

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  • How to solve Memory leaks in Lib Xml Parser in objective-C where the list is returned?

    - by Madan Mohan
    Hi Guys, I got leaks in Lib Xml Parser while retrieving the data from the net, Here in the below code, I have allocated the list - (void)getCustomersList { // make an operation so we can push it into the queue SEL method = @selector(parseForData); NSInvocationOperation *op = [[NSInvocationOperation alloc] initWithTarget:self selector:method object:nil]; customersTempList = [[NSMutableArray alloc] initWithCapacity:20];// allocated list [self.retrieverQueue addOperation:op]; [op release]; } // return each recode // in parser .m class one of the condition in endElement where it shows a leak. else if(0 == strncmp((const char *)localname, kCustomerElement, kCustomerElementLength)) { [customersTempList addObject:customer]; printf("\n no of objects in temp list:%d", [customersTempList count]); if ([customersTempList count] == 20) { NSMutableArray* argsList = [customersTempList copy];//////////////////////here it is showing leak. printf("\n Calling reload data with %d new objects", [argsList count]); SEL selector = @selector(parser:addCustomerObject:); NSMethodSignature *sig = [(id)self.delegate methodSignatureForSelector:selector]; if(nil != sig && [self.delegate respondsToSelector:selector]) { NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig]; [invocation retainArguments]; [invocation setTarget:self.delegate]; [invocation setSelector:selector]; [invocation setArgument:&self atIndex:2]; [invocation setArgument:&argsList atIndex:3]; [invocation performSelectorOnMainThread:@selector(invoke) withObject:NULL waitUntilDone:NO]; } [customersTempList removeAllObjects]; } } // returned the list after all the records are stored in the list else if(0 == strncmp((const char *)localname, kCustomersElement, kCustomersElementLength)) { printf("\n Calling reload data with %d new objects", [customersTempList count]); NSMutableArray* argsList = [customersTempList copy]; printf("\n Calling reload data with %d new objects", [argsList count]); SEL selector = @selector(parser:addCustomerObject:); NSMethodSignature *sig = [(id)self.delegate methodSignatureForSelector:selector]; if(nil != sig && [self.delegate respondsToSelector:selector]) { NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig]; [invocation retainArguments]; [invocation setTarget:self.delegate]; [invocation setSelector:selector]; [invocation setArgument:&self atIndex:2]; [invocation setArgument:&argsList atIndex:3]; [invocation performSelectorOnMainThread:@selector(invoke) withObject:NULL waitUntilDone:NO]; } [customersTempList removeAllObjects]; } } please help me out of this, Thanks, Madan.

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  • 8bpp Bitmap format on the Compact Framework

    - by Kieran
    Hi friends. I am messing around with Conway's Game of Life - http://en.wikipedia.org/wiki/Conway's_Game_of_Life I started out coding algorithmns for winforms and now want to port my work onto windows mobile 6.1 (compact framework). I came across an article by Jon Skeet where he compared several different algorithmns for calculating next generations in the game. He used an array of bytes to store a cells state (alive or dead) and then he would copy this array to an 8bpp bitmap. For each new generation, he works out the state of each byte, then copies the array to a bitmap, then draws that bitmap to a picturebox. void CreateInitialImage() { bitmap = new Bitmap(Width, Height, PixelFormat.Format8bppIndexed); ColorPalette palette = bitmap.Palette; palette.Entries[0] = Color.Black; palette.Entries[1] = Color.White; bitmap.Palette = palette; } public Image Render() { Rectangle rect = new Rectangle(0, 0, Width, Height); BitmapData bmpData = bitmap.LockBits(rect, ImageLockMode.ReadWrite, bitmap.PixelFormat); Marshal.Copy(Data, 0, bmpData.Scan0, Data.Length); bitmap.UnlockBits(bmpData); return bitmap; } His code above is beautifully simple and very fast to render. Jon is using Windows Forms but now I want to port my own version of this onto Windows Mobile 6.1 (Compact Framework) but . . . .there is no way to format a bitmap to 8bpp in the cf. Can anyone suggest a way of rendering an array of bytes to a drawable image in the CF. This array is created in code on the fly (it is NOT loaded from an image file on disk). I basically need to store an array of cells represented by bytes, they are either alive or dead and I then need to draw that array as an image. The game is particularly slow on the CF so I need to implement clever optimised algoritmns but also need to render as fast as possible and the above solution would be pretty dam perfect if only it was available on the compact framework. Many thanks for any help Any suggestions?

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  • Windows splash screen using GDI+

    - by Luther
    The eventual aim of this is to have a splash screen in windows that uses transparency but that's not what I'm stuck on at the moment. In order to create a transparent window, I'm first trying to composite the splash screen and text on an off screen buffer using GDI+. At the moment I'm just trying to composite the buffer and display it in response to a 'WM_PAINT' message. This isn't working out at the moment; all I see is a black window. I imagine I've misunderstood something with regards to setting up render targets in GDI+ and then rendering them (I'm trying to render the screen using straight forward GDI blit) Anyway, here's the code so far: //my window initialisation code void MyWindow::create_hwnd(HINSTANCE instance, const SIZE &dim) { DWORD ex_style = WS_EX_LAYERED ; //eventually I'll be making use of this layerd flag m_hwnd = CreateWindowEx( ex_style, szFloatingWindowClass , L"", WS_POPUP , 0, 0, dim.cx, dim.cy, null, null, instance, null); SetWindowLongPtr(m_hwnd ,0, (__int3264)(LONG_PTR)this); m_display_dc = GetDC(NULL); //This was sanity check test code - just loading a standard HBITMAP and displaying it in WM_PAINT. It worked fine //HANDLE handle= LoadImage(NULL , L"c:\\test_image2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE); m_gdip_offscreen_bm = new Gdiplus::Bitmap(dim.cx, dim.cy); m_gdi_dc = Gdiplus::Graphics::FromImage(m_gdip_offscreen_bm);//new Gdiplus::Graphics(m_splash_dc );//window_dc ;m_splash_dc //this draws the conents of my splash screen - this works if I create a GDI+ context for the window, rather than for an offscreen bitmap. //For all I know, it might actually be working but when I try to display the contents on screen, it shows a black image draw_all(); //this is just to show that drawing something simple on the offscreen bit map seems to have no effect Gdiplus::Pen pen(Gdiplus::Color(255, 0, 0, 255)); m_gdi_dc->DrawLine(&pen, 0,0,100,100); DWORD last_error = GetLastError(); //returns '0' at this stage } And here's the snipit that handles the WM_PAINT message: ---8<----------------------- //Paint message snippit case WM_PAINT: { BITMAP bm; PAINTSTRUCT ps; HDC hdc = BeginPaint(vg->m_hwnd, &ps); //get the HWNDs DC HDC hdcMem = vg->m_gdi_dc->GetHDC(); //get the HDC from our offscreen GDI+ object unsigned int width = vg->m_gdip_offscreen_bm->GetWidth(); //width and height seem fine at this point unsigned int height = vg->m_gdip_offscreen_bm->GetHeight(); BitBlt(hdc, 0, 0, width, height, hdcMem, 0, 0, SRCCOPY); //this blits a black rectangle DWORD last_error = GetLastError(); //this was '0' vg->m_gdi_dc->ReleaseHDC(hdcMem); EndPaint(vg->m_hwnd, &ps); //end paint return 1; } ---8<----------------------- My apologies for the long post. Does anybody know what I'm not quite understanding regarding how you write to an offscreen buffer using GDI+ (or GDI for that matter)and then display this on screen? Thank you for reading.

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  • How do I stack images to simulate depth using Core Animation?

    - by Jeffrey Berthiaume
    I have a series of UIImages with which I need to simulate depth. I can't use scaling because I need to be able to rotate the parent view, and the images should look like they're stacked visibly in front of each other, not on the same plane. I made a new ViewController-based project and put this in the viewDidLoad (as well as attached three 120x120 pixel images named 1.png, 2.png, and 3.png): - (void)viewDidLoad { // display image 3 UIImageView *three = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"3.png"]]; three.center = CGPointMake(160 + 60, 240 - 60); [self.view addSubview:three]; // rotate image 3 around the z axis // THIS IS INCORRECT CATransform3D theTransform = three.layer.transform; theTransform.m34 = 1.0 / -1000; three.layer.transform = theTransform; // display image 2 UIImageView *two = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"2.png"]]; two.center = CGPointMake(160, 240); [self.view addSubview:two]; // display image 1 UIImageView *one = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.png"]]; one.center = CGPointMake(160 - 60, 240 + 60); [self.view addSubview:one]; // rotate image 3 around the z axis // THIS IS INCORRECT theTransform = one.layer.transform; theTransform.m34 = 1.0 / 1000; one.layer.transform = theTransform; // release the images [one release]; [two release]; [three release]; // rotate the parent view around the y axis theTransform = self.view.layer.transform; theTransform.m14 = 1.0 / -500; self.view.layer.transform = theTransform; [super viewDidLoad]; } I have very specific reasons why I'm not using an EAGLView and why I'm not loading the images as CALayers (i.e. why I'm using UIImageViews for each one). This is just a quick demo that I can use to work out exactly what I need in my parent application. Is there some matrix way to translate these 2d images along the z-axis so they will look like what I'm trying to represent? I've gone through the other StackOverflow articles as well as the Wikipedia references, and have not found what I'm looking for -- although I might not necessarily be using the right terms for what I'm trying to do.

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  • QValidator for hex input

    - by Evan Teran
    I have a Qt widget which should only accept a hex string as input. It is very simple to restrict the input characters to [0-9A-Fa-f], but I would like to have it display with a delimiter between "bytes" so for example if the delimiter is a space, and the user types 0011223344 I would like the line edit to display 00 11 22 33 44 Now if the user presses the backspace key 3 times, then I want it to display 00 11 22 3. I almost have what i want, so far there is only one subtle bug involving using the delete key to remove a delimiter. Does anyone have a better way to implement this validator? Here's my code so far: class HexStringValidator : public QValidator { public: HexStringValidator(QObject * parent) : QValidator(parent) {} public: virtual void fixup(QString &input) const { QString temp; int index = 0; // every 2 digits insert a space if they didn't explicitly type one Q_FOREACH(QChar ch, input) { if(std::isxdigit(ch.toAscii())) { if(index != 0 && (index & 1) == 0) { temp += ' '; } temp += ch.toUpper(); ++index; } } input = temp; } virtual State validate(QString &input, int &pos) const { if(!input.isEmpty()) { // TODO: can we detect if the char which was JUST deleted // (if any was deleted) was a space? and special case this? // as to not have the bug in this case? const int char_pos = pos - input.left(pos).count(' '); int chars = 0; fixup(input); pos = 0; while(chars != char_pos) { if(input[pos] != ' ') { ++chars; } ++pos; } // favor the right side of a space if(input[pos] == ' ') { ++pos; } } return QValidator::Acceptable; } }; For now this code is functional enough, but I'd love to have it work 100% as expected. Obviously the ideal would be the just separate the display of the hex string from the actual characters stored in the QLineEdit's internal buffer but I have no idea where to start with that and I imagine is a non-trivial undertaking. In essence, I would like to have a Validator which conforms to this regex: "[0-9A-Fa-f]( [0-9A-Fa-f])*" but I don't want the user to ever have to type a space as delimiter. Likewise, when editing what they types, the spaces should be managed implicitly.

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  • How do I get the next token in a Cstring if I want to use it as an int? (c++)

    - by Van
    My objective is to take directions from a user and eventually a text file to move a robot. The catch is that I must use Cstrings(such as char word[];) rather than the std::string and tokenize them for use. the code looks like this: void Navigator::manualDrive() { char uinput[1]; char delim[] = " "; char *token; cout << "Enter your directions below: \n"; cin.ignore(); cin.getline (uinput, 256); token=strtok(uinput, delim); if(token == "forward") { int inches; inches=token+1; travel(inches); } } I've never used Cstrings I've never tokenized anything before, and I don't know how to write this. Our T.A.'s expect us to google and find all the answers because they are aware we've never been taught these methods. Everyone in my lab is having much more trouble than usual. I don't know the code to write but I know what I want my program to do. I want it to execute like this: 1) Ask for directions. 2) cin.getline the users input 3) tokenize the inputed string 4) if the first word token == "forward" move to the next token and find out how many inches to move forward then move forward 5) else if the first token == "turn" move to the next token. if the next token == "left" move to the next token and find out how many degrees to turn left I will have to do this for forward x, backward x, turn left x, turn right x, and stop(where x is in inches or degrees). I already wrote functions that tell the robot how to move forward an inch and turn in degrees. I just need to know how to convert the inputted strings to all lowercase letters and move from token to token and convert or extract the numbers from the string to use them as integers. If all is not clear you can read my lab write up at this link: http://www.cs.utk.edu/~cs102/robot_labs/Lab9.html If anything is unclear please let me know, and I will clarify as best I can.

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  • What is the best way to create related types at runtime?

    - by SniperSmiley
    How do I determine the type of a class that is related to another class at runtime? I have figured out a solution, the only problem is that I ended up having to use a define that has to be used in all of the derived classes. Is there a simpler way to do this that doesn't need the define or a copy paste? Things to note: both the class and the related class will always have their respective base class, the different classes can share a related class, and as in the example I would like the control class to own the view. #include <iostream> #include <string> class model; class view { public: view( model *m ) {} virtual std::string display() { return "view"; } }; #define RELATED_CLASS(RELATED)\ typedef RELATED relatedType;\ virtual relatedType*createRelated(){\ return new relatedType(this);} class model { public: RELATED_CLASS(view) model() {} }; class otherView : public view { public: otherView( model *m ) : view(m) {} std::string display() { return "otherView"; } }; class otherModel : public model { public: RELATED_CLASS(otherView) otherModel() {} }; class control { public: control( model *m ) : m_(m), v_( m->createRelated() ) {} ~control() { delete v_; } std::string display() { return v_->display(); } model *m_; view *v_; }; int main( void ) { model m; otherModel om; model *pm = &om; control c1( &m ); control c2( &om ); control c3( pm ); std::cout << c1.display() << std::endl; std::cout << c2.display() << std::endl; std::cout << c3.display() << std::endl; }

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  • Android HelloGoogleMaps to OSMdroid (Open Street Maps)

    - by birgit
    I am trying to reproduce a working HelloGoogleMaps app in Open Street Maps - but I have trouble including the itemized overlay in OSMdroid. I have looked at several resources but I cannot figure out how to fix the error on OsmItemizedOverlay - I guess I am constructing OsmItemizedOverlay wrongly or have a mixup with OsmItemizedOverlay and ItemizedOverlay? But everything I tried to change just raised more errors... "Implicit super constructor ItemizedOverlay() is undefined. Must explicitly invoke another constructor" "Cannot make a static reference to the non-static method setMarker(Drawable) from the type OverlayItem" - I hope someone can help me getting the class definition straight? Thanks so much! package com.example.osmdroiddemomap; import java.util.ArrayList; import android.app.AlertDialog; import android.content.Context; import android.graphics.Point; import android.graphics.drawable.Drawable; import org.osmdroid.api.IMapView; import org.osmdroid.views.*; import org.osmdroid.views.overlay.*; import org.osmdroid.views.overlay.OverlayItem.HotspotPlace; public class OsmItemizedOverlay extends ItemizedOverlay<OverlayItem> { Context mContext; private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>(); //ERRORS are raised by the following 3 lines: public OsmItemizedOverlay(Drawable defaultMarker, Context context) { OverlayItem.setMarker(defaultMarker); OverlayItem.setMarkerHotspot(HotspotPlace.CENTER); mContext = context; } public void addOverlay(OverlayItem overlay) { mOverlays.add(overlay); populate(); } @Override protected OverlayItem createItem(int i) { return mOverlays.get(i); } @Override public int size() { return mOverlays.size(); } protected boolean onTap(int index) { OverlayItem item = mOverlays.get(index); AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); dialog.setTitle(item.getTitle()); dialog.setMessage(item.getSnippet()); dialog.show(); return true; } @Override public boolean onSnapToItem(int arg0, int arg1, Point arg2, IMapView arg3) { // TODO Auto-generated method stub return false; } }

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  • DataContractSerializer sensitive to order of XML??

    - by e28Makaveli
    I have the following serialized XML: DataDescriptor <d5p1:TimePastToInitializeData > <d5p1:Hours>2</d5p1:Hours> <d5p1:Minutes>10</d5p1:Minutes> <d5p1:Seconds>5</d5p1:Seconds> </d5p1:TimePastToInitializeData> <d5p1:PollRate > <d5p1:Hours>2</d5p1:Hours> <d5p1:Minutes>10</d5p1:Minutes> <d5p1:Seconds>5</d5p1:Seconds> </d5p1:PollRate> </Value> </KeyValueOfstringanyType> With this order, the PollRate property is not constructed and the resulting deserialized object has a null value for this field. If, however, I change the order as follows: DataDescriptor <d5p1:PollRate > <d5p1:Hours>2</d5p1:Hours> <d5p1:Minutes>10</d5p1:Minutes> <d5p1:Seconds>5</d5p1:Seconds> </d5p1:PollRate> <d5p1:TimePastToInitializeData > <d5p1:Hours>2</d5p1:Hours> <d5p1:Minutes>10</d5p1:Minutes> <d5p1:Seconds>5</d5p1:Seconds> </d5p1:TimePastToInitializeData> </Value> </KeyValueOfstringanyType> both properties PollRate and TimePastToInitializeData are constructed and initialized properly. public class DataDescriptor { RefreshRate pastTime; [DataMember] public RefreshRate TimePastToInitializeData { get; set; } RefreshRate pollRate; [DataMember] public RefreshRate PollRate { get; set; } [OnDeserializing] void Initialize(StreamingContext c) { // should I do this?? } } And RefreshRate: [DataContract( Namespace = "http//www.emssatcom.com/occ600")] [Serializable] public class RefreshRate : Observable { public RefreshRate() { } int hours; [DataMember] public int Hours { get; set; } int mins; [DataMember] public int Minutes { get; set; } int secs; [DataMember] public int Seconds { get; set; } int ms; [DataMember] public int MilliSeconds { get; set; } }

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  • User created Validator wont call Client side validation Javascript on 'complex' user control.

    Hi All, I have created a user control (from System.Web.UI.UserControl), and created my own validator for the user control (from System.Web.UI.WebControls.BaseValidator). Everything works ok until I try to get the user control to do client side validation. While trying to debug this issue I have set 'Control to Validate' to a text box instead of the custom user control, and the client side script works fine! It appears to me that it has an a issue with my composite user control I have created. Has anyone encountered this issue before? Has anyone else seen client side validation fail on custom user controls? Some extra info : The composite control is a drop down list and 'loader image', as it is a ajax enabled drop down list (using ICallbackEventHandler). I know that the client side javascript is being written to the page, and have placed an alert('random message') as the first line in the validator function that only appears if it is validating a text box (i.e. not when it is validating my custom control) Language : C# (ASP.NET 2.0) and jQuery 1.2.6 in aspx file : <rms:UserDDL ID="ddlUserTypes" runat="server" PreLoad="true" /> <rms:DDLValidator ID="userTypesVal" ControlToValidate="ddlUserTypes" ErrorMessage="You have not selected a UserType" runat="server" Text="You have not selected a UserType" Display="Dynamic" EnableClientScript="true" /> in validator code behind protected string ScriptBlock { get { string nl = System.Environment.NewLine; return "<script type=\"text/javascript\">" + nl + " function " + ScriptBlockFunctionName + "(ctrl)" + nl + " {" + nl + " alert('Random message'); " + nl + " var selVal = $('#' + ctrl.controltovalidate).val(); " + nl + " alert(selVal);" + nl + " if (selVal === '-1') return false; " + nl + " return false; " + nl + " }" + nl + "</script>"; } } protected override void OnPreRender(EventArgs e) { if (this.DetermineRenderUplevel() && this.EnableClientScript) { Page.ClientScript.RegisterExpandoAttribute(this.ClientID, "evaluationfunction", this.ScriptBlockFunctionName); Page.ClientScript.RegisterClientScriptBlock(GetType(), this.ScriptBlockKey, this.ScriptBlock); } base.OnPreRender(e); } I know my ControlPropertiesValid() and EvaluateIsValid() work ok. I appreciate any help on this issue. Noel.

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  • Efficient list compacting

    - by Patrik
    Suppose you have a list of unsigned ints. Suppose some elements are equal to 0 and you want to push them back. Currently I use this code (list is a pointer to a list of unsigned ints of size n for (i = 0; i < n; ++i) { if (list[i]) continue; int j; for (j = i + 1; j < n && !list[j]; ++j); int z; for (z = j + 1; z < n && list[z]; ++z); if (j == n) break; memmove(&(list[i]), &(list[j]), sizeof(unsigned int) * (z - j))); int s = z - j + i; for(j = s; j < z; ++j) list[j] = 0; i = s - 1; } Can you think of a more efficient way to perform this task? The snippet is purely theoretical, in the production code, each element of list is a 64 bytes struct EDIT: I'll post my solution. Many thanks to Jonathan Leffler. void RemoveDeadParticles(int * list, int * n) { int i, j = *n - 1; for (; j >= 0 && list[j] == 0; --j); for (i = 0; i < j; ++i) { if (list[i]) continue; memcpy(&(list[i]), &(list[j]), sizeof(int)); list[j] = 0; for (; j >= 0 && list[j] == 0; --j); if (i == j) break; } *n = i + 1; }

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  • SQLite bulk insert on iPhone not working

    - by App_beginner
    Hi. I have been struggling with this seeminly easy problem for 48 hours, and I am no closer to a solution. So I was hoping that someone might be able to help me. I am building a app, that use a combination of a local (SQLite) database and an online database (PHP/MYSQL). The app is nearly finished. Checked for leaks and work like a charm. However the very last part is the part I have struggled with. On launch, I want the app to check for changes to the online databse, and if there is. I want it to download and parse a xml file containing the changes. Everything is working fine this far. But when I try to bulk insert my parsed data to my database, the app crashes, giving a NSInternalInconsistency error. Due to the database returning SQLITE_MISUSE. I have done a lot of googling, but am still unable to solve my problem. So I am putting the code here, hoping that someone can help me fix this. And I know that I should have used core data for this. But this is the very last part I am struggling with, and I am very reluctant to changing my entire code now. Core data will have to come in the update. Here is the error I recieve: Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error while inserting data. 'library routine called out of sequence'' Here is my code: -(void)UpdateDatabase:(const char *)_query NewValues:(NSMutableArray *)_odb dbn:(NSString *)_dbn dbp:(NSString *)_dbp { sqlite3 *database; NSMutableArray *NewValues = _odb; int i; const char *query = _query; sqlite3_stmt *addStmt; for (i = 1; i < [NewValues count]; i++) { if(sqlite3_prepare_v2(database, query, -1, &addStmt, NULL) == SQLITE_OK) { sqlite3_bind_text(addStmt, 1, [[[NewValues objectAtIndex:i] name] UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(addStmt, 2, [[[NewValues objectAtIndex:i] city]UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_double(addStmt, 3, [[[NewValues objectAtIndex:i] lat] doubleValue]); sqlite3_bind_int(addStmt, 4, [[[NewValues objectAtIndex:i] long] doubleValue]); sqlite3_bind_int(addStmt, 5, [[[NewValues objectAtIndex:i] code] intValue]); } if(SQLITE_DONE != sqlite3_step(addStmt)) { NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database)); } //Reset the add statement. sqlite3_reset(addStmt); } }

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  • mulformed Farsi characters on AWT

    - by jlover2010
    Hi As i started programming by jdk6, i had no problem in text components neither in awt nor in swing. But for labels or titles of awt components, yes : I couldn't have Farsi characters displayable on AWTs just as simple as Swing by typing them into the source code. lets check this SSCCE : import javax.swing.*; import java.awt.*; import java.io.*; import java.util.Properties; public class EmptyFarsiCharsOnAWT extends JFrame{ public EmptyFarsiCharsOnAWT() { super("????"); setDefaultCloseOperation(3); setVisible(rootPaneCheckingEnabled); } public static void main(String[] args) throws AWTException, IOException { JFrame jFrame = new EmptyFarsiCharsOnAWT(); MenuItem show ; // approach 1 = HardCoding : /* show = new MenuItem("\u0646\u0645\u0627\u06cc\u0634"); * */ // approach 2 = using simple utf-8 saved text file : /* BufferedReader in = new BufferedReader(new FileReader("farsiLabels.txt")); String showLabel = in.readLine(); in.close(); show = new MenuItem(showLabel); * */ // approach 3 = using properties file : FileReader in = new FileReader("farsiLabels.properties"); Properties farsiLabels = new Properties(); farsiLabels.load(in); show = new MenuItem(farsiLabels.getProperty("tray.show")); PopupMenu popUp = new PopupMenu(); popUp.add(show); // creating Tray object Image iconIamge = Toolkit.getDefaultToolkit().getImage("greenIcon.png"); TrayIcon trayIcon = new TrayIcon(iconIamge, null, popUp); SystemTray tray = SystemTray.getSystemTray(); tray.add(trayIcon); jFrame.setIconImage(iconIamge); } } Yes, i know each of three approaches in source code does right when you may test it from IDE , but if you make a JAR contains just this class (and its resources) by means of NetBeans project clean&build ,you won't see the expected characters and will just get EMPTY/BLANK SQUARES ! Unfortunately, opposed to other situations i encountered before, here there is no way to avoid using awt and make use of Swing in this case. And this was just an SSCCE i made to show the problem and my recent (also first) application suffers from this subject. And i think should have to let you know I posted this question a while ago in SDN and "the Java Ranch" forums and other native forums and still I'm watching... By the way i am using latest version of Netbeans IDE... I will be so grateful if anybody has a solution to this damn AWT components never rendered any Farsi character for me... Thanks in advance

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  • problem while displayin the texture image on view that works fine on iphone simulator but not on dev

    - by yunas
    hello i am trying to display an image on iphone by converting it into texture and then displaying it on the UIView. here is the code to load an image from an UIImage object - (void)loadImage:(UIImage *)image mipmap:(BOOL)mipmap texture:(uint32_t)texture { int width, height; CGImageRef cgImage; GLubyte *data; CGContextRef cgContext; CGColorSpaceRef colorSpace; GLenum err; if (image == nil) { NSLog(@"Failed to load"); return; } cgImage = [image CGImage]; width = CGImageGetWidth(cgImage); height = CGImageGetHeight(cgImage); colorSpace = CGColorSpaceCreateDeviceRGB(); // Malloc may be used instead of calloc if your cg image has dimensions equal to the dimensions of the cg bitmap context data = (GLubyte *)calloc(width * height * 4, sizeof(GLubyte)); cgContext = CGBitmapContextCreate(data, width, height, 8, width * 4, colorSpace, kCGImageAlphaPremultipliedLast); if (cgContext != NULL) { // Set the blend mode to copy. We don't care about the previous contents. CGContextSetBlendMode(cgContext, kCGBlendModeCopy); CGContextDrawImage(cgContext, CGRectMake(0.0f, 0.0f, width, height), cgImage); glGenTextures(1, &(_textures[texture])); glBindTexture(GL_TEXTURE_2D, _textures[texture]); if (mipmap) glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); else glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data); if (mipmap) glGenerateMipmapOES(GL_TEXTURE_2D); err = glGetError(); if (err != GL_NO_ERROR) NSLog(@"Error uploading texture. glError: 0x%04X", err); CGContextRelease(cgContext); } free(data); CGColorSpaceRelease(colorSpace); } The problem that i currently am facing is this code workd perfectly fine and displays the image on simulator where as on the device as seen on debugger an error is displayed i.e. Error uploading texture. glError: 0x0501 any idea how to tackle this bug.... thnx in advance 4 ur soluitons

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  • Removing elements from heap

    - by user193138
    I made a heap. I am curious if there's something subtley wrong with my remove function: int Heap::remove() { if (n == 0) exit(1); int temp = arr[0]; arr[0] = arr[--n]; heapDown(0); arr[n] = 0; return temp; } void Heap::heapDown(int i) { int l = left(i); int r = right(i); // comparing parent to left/right child // each has an inner if to handle if the first swap causes a second swap // ie 1 -> 3 -> 5 // 3 5 1 5 1 3 if (l < n && arr[i] < arr[l]) { swap(arr[i], arr[l]); heapDown(l); if (r < n && arr[i] < arr[r]) { swap(arr[i], arr[r]); heapDown(r); } } else if (r < n && arr[i] < arr[r]) { swap(arr[i], arr[r]); heapDown(r); if (l < n && arr[i] < arr[l]) { swap(arr[i], arr[l]); heapDown(l); } } } Here's my output i1i2i3i4i5i6i7 p Active heap: 7 4 6 1 3 2 5 r Removed 7 r Removed 6 p Active heap: 5 3 4 1 2 Here's my teacher's sample output: p Active heap : 7 4 6 1 3 2 5 r Removed 7 r Removed 6 p Active heap : 5 4 2 1 3 s Heapsorted : 1 2 3 4 5 While our outputs are completely different, I do seem to hold maxheap principle of having everything left oriented and for all nodes parent child(in every case I tried). I try to do algs like this from scratch, so maybe I'm just doing something really weird and wrong (I would only consider it "wrong" if it's O(lg n), as removes are intended to be for heaps). Is there anything in particular "wrong" about my remove? Thanks, http://ideone.com/PPh4eQ

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  • Binary file reading problem

    - by ScReYm0
    Ok i have problem with my code for reading binary file... First i will show you my writing code: void book_saving(char *file_name, struct BOOK *current) { FILE *out; BOOK buf; out = fopen(file_name, "wb"); if(out != NULL) { printf_s("Writting to file..."); do { if(current != NULL) { strcpy(buf.catalog_number, current->catalog_number); strcpy(buf.author, current->author); buf.price = current->price; strcpy(buf.publisher, current->publisher); strcpy(buf.title, current->title); buf.price = current->year_published; fwrite(&buf, sizeof(BOOK), 1, out); } current = current->next; }while(current != NULL); printf_s("Done!\n"); fclose(out); } } and here is my "version" for reading it back: int book_open(struct BOOK *current, char *file_name) { FILE *in; BOOK buf; BOOK *vnext; int count; int i; in = fopen("west", "rb"); printf_s("Reading database from %s...", file_name); if(!in) { printf_s("\nERROR!"); return 1; } i = fread(&buf,sizeof(BOOK), 1, in); while(!feof(in)) { if(current != NULL) { current = malloc(sizeof(BOOK)); current->next = NULL; } strcpy(current->catalog_number, buf.catalog_number); strcpy(current->title, buf.title); strcpy(current->publisher, buf.publisher); current->price = buf.price; current->year_published = buf.year_published; fread(&buf, 1, sizeof(BOOK), in); while(current->next != NULL) current = current->next; fclose(in); } printf_s("Done!"); return 0; } I just need to save my linked list in binary file and to be able to read it back ... please help me. The program just don't read it or its crash every time different situation ...

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