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  • How to initialize an unsigned long long type?

    - by Sujay
    Hello all, I'm trying to initialize an unsigned long long int type. But the compiler is throwing an error "error: integer constant is too large for "long" type ". The initialization is shown below : unsigned long long temp = 1298307964911120440; Can anybody please let me know what the problem is and suggest a solution for the same. With Regards Sujay

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  • invalid effective address calculation!

    - by Zia ur Rahman
    Hay Dear! Please look at the following program, the error is invalid effective address calculation and i have mentioned that line please tell me why its invalid effective address calculation here is the program [org 0x100] jmp start array1: dw 10,15,20,25,30,35,40,45,50,55 array2: dw 15,10,20,35,40,30,55,50,25,45 start: mov bx,0 mov dx,0 loop: mov ax,[array2+bx] cmp ax,[array1+cx]//here is the error invalid effective address calculation jne NextElementOfArray1 NextElementOfArray2: add bx,2 cmp bx,20 je end mov cx,0 jmp loop NextElementOfArray1: add cx,2 cmp cx,20 je NextElementOfArray2 jmp loop end: mov ax,0x4c00 int 0x21

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  • Bind listbox in WPF with grouping

    - by Michael Stoll
    Hi, I've got a collection of ViewModels and want to bind a ListBox to them. Doing some investigation I found this. So my ViewModel look like this (Pseudo Code) interface IItemViewModel { string DisplayName { get; } } class AViewModel : IItemViewModel { string DisplayName { return "foo"; } } class BViewModel : IItemViewModel { string DisplayName { return "foo"; } } class ParentViewModel { IEnumerable<IItemViewModel> Items { get { return new IItemViewModel[] { new AItemViewModel(), new BItemViewModel() } } } } class GroupViewModel { static readonly GroupViewModel GroupA = new GroupViewModel(0); static readonly GroupViewModel GroupB = new GroupViewModel(1); int GroupIndex; GroupViewModel(int groupIndex) { this.GroupIndex = groupIndex; } string DisplayName { get { return "This is group " + GroupIndex.ToString(); } } } class ItemGroupTypeConverter : IValueConverter { object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if (value is AItemViewModel) return GroupViewModel.GroupA; else return GroupViewModel.GroupB; } } And this XAML <UserControl.Resources> <vm:ItemsGroupTypeConverter x:Key="ItemsGroupTypeConverter "/> <CollectionViewSource x:Key="GroupedItems" Source="{Binding Items}"> <CollectionViewSource.GroupDescriptions> <PropertyGroupDescription Converter="{StaticResource ItemsGroupTypeConverter }"/> </CollectionViewSource.GroupDescriptions> </CollectionViewSource> </UserControl.Resources> <ListBox ItemsSource="{Binding Source={StaticResource GroupedItems}}"> <ListBox.GroupStyle> <GroupStyle> <GroupStyle.HeaderTemplate> <DataTemplate> <TextBlock Text="{Binding DisplayName}" FontWeight="bold" /> </DataTemplate> </GroupStyle.HeaderTemplate> </GroupStyle> </ListBox.GroupStyle> <ListBox.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding DisplayName}" /> </DataTemplate> </ListBox.ItemTemplate> </ListBox> This works somehow, exept of the fact that the binding of the HeaderTemplate does not work. Anyhow I'd prefer omitting the TypeConverter and the CollectionViewSource. Isn't there a way to use a property of the ViewModel for Grouping? I know that in this sample scenario it would be easy to replace the GroupViewModel with a string an have it working, but that's not an option. So how can I bind the HeaderTemplate to the GroupViewModel?

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  • Validate a long type input

    - by Santiago
    I'm trying to validate that a user only enters a long value as input (long bigger than 0 actually). Compare and Range validator has DataTypeCheck for int values only. I was planning on using this class in a CustomValidator but then I would need to write both, client and server side validation code. Do you know of any other good way of doing this? Thanks!

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  • Miller-rabin exception number?

    - by nightcracker
    Hey everyone. This question is about the number 169716931325235658326303. According to http://www.alpertron.com.ar/ECM.HTM it is prime. According to my miller-rabin implementation in python with 7 repetitions is is composite. With 50 repetitions it is still composite. With 5000 repetitions it is STILL composite. I thought, this might be a problem of my implementation. So I tried GNU MP bignum library, which has a miller-rabin primality test built-in. I tested with 1000000 repetitions. Still composite. This is my implementation of the miller-rabin primality test: def isprime(n, precision=7): if n == 1 or n % 2 == 0: return False elif n < 1: raise ValueError("Out of bounds, first argument must be > 0") d = n - 1 s = 0 while d % 2 == 0: d //= 2 s += 1 for repeat in range(precision): a = random.randrange(2, n - 2) x = pow(a, d, n) if x == 1 or x == n - 1: continue for r in range(s - 1): x = pow(x, 2, n) if x == 1: return False if x == n - 1: break else: return False return True And the code for the GMP test: #include <gmp.h> #include <stdio.h> int main(int argc, char* argv[]) { mpz_t test; mpz_init_set_str(test, "169716931325235658326303", 10); printf("%d\n", mpz_probab_prime_p(test, 1000000)); mpz_clear(test); return 0; } As far as I know there are no "exceptions" (which return false positives for any amount of repetitions) to the miller-rabin primality test. Have I stumpled upon one? Is my computer broken? Is the Elliptic Curve Method wrong? What is happening here? EDIT I found the issue, which is http://www.alpertron.com.ar/ECM.HTM. I trusted this applet, I'll contact the author his applet's implementation of the ECM is faulty for this number. Thanks. EDIT2 Hah, the shame! In the end it was something that went wrong with copy/pasting on my side. NOR the applet NOR the miller-rabin algorithm NOR my implementation NOR gmp's implementation of it is wrong, the only thing that's wrong is me. I'm sorry.

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  • Converting from a string to boolean in Python?

    - by Joan Venge
    Does anyone know how to do convert from a string to a boolean in Python? I found this link. But it doesn't look like a proper way to do it. I.e. using a built in functionality, etc. EDIT: The reason I asked this is because I learned int("string"), from here. I tried bool ("string") but always got True.

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  • C stack/scope, variable's lifetime after functions ends

    - by Ranking Stackingblocks
    void someFunc() { int stackInt = 4; someOtherFunc(&stackInt); } Is it the case that stackInt's address space could be reallocated after someFunc ends, making it unsafe to assume that the value passed to someOtherFunc represents the stackInt variable with value 4 that was passed to it? In other words, should I avoid passing stack variables around by address and expecting them to still be alive after the function they were initialised in has ended?

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  • Problem with OnMeasureItem()

    - by Isuru
    Hi, I used OnMeasureItem() in my MFC ListControl to increase the height of the rows, and added WM_ON_MEASUREITEM() message in the Map. THe code I used is as follows: void CListCtrlTestDlg::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct) { if( nIDCtl == IDC_LIST1 )//IDC_LIST1 is my ListControl ID { lpMeasureItemStruct->itemHeight += 20; } } It doesn't Work. Any suggestion what the problem is??? Thank You!!!!

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  • Middle East XML Currency Conversion

    - by Tim
    Using the following script to do currency conversion which relies on an XML feed. http://www.white-hat-web-design.co.uk/articles/php-currency-conversion.php It grabs the data from the following feed... var $xml_file = "www.ecb.int/stats/eurofxref/eurofxref-daily.xml"; However this XML feed has limited currencies and I require currencies for the Middle East. Does anyone know where I can find an XML file with Middle East currencies or have any better suggestions?

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  • Monotouch - ICSharpCode.SharpZipLib giving an error

    - by Claudio
    Hy guys, I'm trying to generate a Zip File with ICSharpCode.SharpZipLib library but it's throwing a really weird error. Code: public static void ZipFiles(string inputFolderPath, string outputPathAndFile, string password) { ArrayList ar = GenerateFileList(inputFolderPath); // generate file list int TrimLength = (Directory.GetParent(inputFolderPath)).ToString().Length; TrimLength += 1; //remove '\' FileStream ostream; byte[] obuffer; ZipOutputStream oZipStream = new ZipOutputStream(File.Create(outputPathAndFile)); // create zip stream if (password != null && password != String.Empty) oZipStream.Password = password; oZipStream.SetLevel(9); // maximum compression ZipEntry oZipEntry; foreach (string Fil in ar) // for each file, generate a zipentry { oZipEntry = new ZipEntry(Fil.Remove(0, TrimLength)); oZipStream.PutNextEntry(oZipEntry); if (!Fil.EndsWith(@"/")) // if a file ends with '/' its a directory { ostream = File.OpenRead(Fil); obuffer = new byte[ostream.Length]; ostream.Read(obuffer, 0, obuffer.Length); oZipStream.Write(obuffer, 0, obuffer.Length); } } oZipStream.Finish(); oZipStream.Close(); } private static ArrayList GenerateFileList(string Dir) { ArrayList fils = new ArrayList(); bool Empty = true; foreach (string file in Directory.GetFiles(Dir,"*.xml")) // add each file in directory { fils.Add(file); Empty = false; } if (Empty) { if (Directory.GetDirectories(Dir).Length == 0) // if directory is completely empty, add it { fils.Add(Dir + @"/"); } } foreach (string dirs in Directory.GetDirectories(Dir)) // recursive { foreach (object obj in GenerateFileList(dirs)) { fils.Add(obj); } } return fils; // return file list } Error: Unhandled Exception: System.NotSupportedException: CodePage 437 not supported at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (Int32 flags, System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry entry) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.ZipFiles (System.String inputFolderPath, System.String outputPathAndFile, System.String password) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.<ViewDidLoad>m__6 (System.Object , System.EventArgs ) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in <filename unknown>:0 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in <filename unknown>:0 at WpfPrototype1.Application.Main (System.String[] args) [0x00000] in <filename unknown>:0 How can I make this code support CodePage 437? Regards, Claudio

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  • Panning weirdness on an UserControl

    - by Matías
    Hello, I'm trying to build my own "PictureBox like" control adding some functionalities. For example, I want to be able to pan over a big image by simply clicking and dragging with the mouse. The problem seems to be on my OnMouseMove method. If I use the following code I get the drag speed and precision I want, but of course, when I release the mouse button and try to drag again the image is restored to its original position. using System.Drawing; using System.Windows.Forms; namespace Testing { public partial class ScrollablePictureBox : UserControl { private Image image; private bool centerImage; public Image Image { get { return image; } set { image = value; Invalidate(); } } public bool CenterImage { get { return centerImage; } set { centerImage = value; Invalidate(); } } public ScrollablePictureBox() { InitializeComponent(); SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer, true); Image = null; AutoScroll = true; AutoScrollMinSize = new Size(0, 0); } private Point clickPosition; private Point scrollPosition; protected override void OnMouseDown(MouseEventArgs e) { base.OnMouseDown(e); clickPosition.X = e.X; clickPosition.Y = e.Y; } protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove(e); if (e.Button == MouseButtons.Left) { scrollPosition.X = clickPosition.X - e.X; scrollPosition.Y = clickPosition.Y - e.Y; AutoScrollPosition = scrollPosition; } } protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); e.Graphics.FillRectangle(new Pen(BackColor).Brush, 0, 0, e.ClipRectangle.Width, e.ClipRectangle.Height); if (Image == null) return; int centeredX = AutoScrollPosition.X; int centeredY = AutoScrollPosition.Y; if (CenterImage) { //Something not relevant } AutoScrollMinSize = new Size(Image.Width, Image.Height); e.Graphics.DrawImage(Image, new RectangleF(centeredX, centeredY, Image.Width, Image.Height)); } } } But if I modify my OnMouseMove method to look like this: protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove(e); if (e.Button == MouseButtons.Left) { scrollPosition.X += clickPosition.X - e.X; scrollPosition.Y += clickPosition.Y - e.Y; AutoScrollPosition = scrollPosition; } } ... you will see that the dragging is not smooth as before, and sometimes behaves weird (like with lag or something). What am I doing wrong? I've also tried removing all "base" calls on a desperate movement to solve this issue, haha, but again, it didn't work. Thanks for your time.

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  • Rendering HTML in Java

    - by ferronrsmith
    I am trying to create a help panel for an application I am working on. The help file as already been created using html technology and I would like it to be rendered in a pane and shown. All the code I have seen shows how to render a site e.g. "http://google.com". I want to render a file from my pc e.g. "file://c:\tutorial.html" This is the code i have, but it doesn't seem to be working. import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.SwingUtilities; import java.awt.Color; import java.awt.Container; import java.io.IOException; import static java.lang.System.err; import static java.lang.System.out; final class TestHTMLRendering { // ------------------------------ CONSTANTS ------------------------------ /** * height of frame in pixels */ private static final int height = 1000; /** * width of frame in pixels */ private static final int width = 1000; private static final String RELEASE_DATE = "2007-10-04"; /** * title for frame */ private static final String TITLE_STRING = "HTML Rendering"; /** * URL of page we want to display */ private static final String URL = "file://C:\\print.html"; /** * program version */ private static final String VERSION_STRING = "1.0"; // --------------------------- main() method --------------------------- /** * Debugging harness for a JFrame * * @param args command line arguments are ignored. */ @SuppressWarnings( { "UnusedParameters" } ) public static void main( String args[] ) { // Invoke the run method on the Swing event dispatch thread // Sun now recommends you call ALL your GUI methods on the Swing // event thread, even the initial setup. // Could also use invokeAndWait and catch exceptions SwingUtilities.invokeLater( new Runnable() { /** * } fire up a JFrame on the Swing thread */ public void run() { out.println( "Starting" ); final JFrame jframe = new JFrame( TITLE_STRING + " " + VERSION_STRING ); Container contentPane = jframe.getContentPane(); jframe.setSize( width, height ); contentPane.setBackground( Color.YELLOW ); contentPane.setForeground( Color.BLUE ); jframe.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); try { out.println( "acquiring URL" ); JEditorPane jep = new JEditorPane( URL ); out.println( "URL acquired" ); JScrollPane jsp = new JScrollPane( jep, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED ); contentPane.add( jsp ); } catch ( IOException e ) { err.println( "can't find URL" ); contentPane.add( new JLabel( "can't find URL" ) ); } jframe.validate(); jframe.setVisible( true ); // Shows page, with HTML comments erroneously displayed. // The links are not clickable. } } ); }// end main }// end TestHTMLRendering

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  • DataContractSerializer and XSLT not Serializing Class Properties

    - by Russ Clark
    I've written a simple Employee class that I'm trying to serialize to an XDocument and then use XSLT to transform the document to a page that displays both the properties (Name and ID) from the Employee class, and an html form with 2 radio buttons (Approve and Reject) and a submit button. Here is the Employee class: [Serializable, DataContract(Namespace="XSLT_MVC.Controllers/")] public class Employee { [DataMember] public string Name { get; set; } [DataMember] public int ID { get; set; } public Employee() { } public Employee(string name, int id) { Name = name; ID = id; } public XDocument GetDoc() { XDocument doc = new XDocument(); var serializer = new DataContractSerializer(typeof(Employee)); using (var writer = doc.CreateWriter()) { serializer.WriteObject(writer, this); writer.Close(); } return doc; } } And here is the XSLT file: <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > <xsl:output method="html" indent="yes"/> <xsl:template match="/"> <html> <body> <xsl:value-of select="Employee/Name"/> <br /> <xsl:value-of select="Employee/ID"/> <br /> <form method="post" action="/Home/ProcessRequest?id={Employee/ID}"> <input id="Action" name="Action" type="radio" value="Approved"></input> Approved <br /> <input id="Action" name="Action" type="radio" value="Rejected"></input> Rejected <br /> <input type="submit" value="Submit"></input> </form> </body> </html> </xsl:template> </xsl:stylesheet> When I run this, all I get is the html form with the 2 radio buttons and the submit button, but not the properties from the Employee class. I saw a separate StackOverflow post that said I need to change the <xsl:template match="/"> to match on the namespace of my Employee class like this: <xsl:template match="/XSLT_MVC.Controllers"> but when I do that, now all I get are the Employee properties, and not the html form with the 2 radio buttons and the submit button. Does anyone know what needs to be done so that my transform will select and display both the Employee properties and the html form?

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  • Creating a System::String object from a BSTR in Managed C++ - is this way a good idea???

    - by Eli
    My co-worker is filling a System::String object with double-byte characters from an unmanaged library by the following method: RFC_PARAMETER aux; Object* target; RFC_UNICODE_TYPE_ELEMENT* elm; elm = &(m_coreObject->m_pStructMeta->m_typeElements[index]); aux.name = NULL; aux.nlen = 0; aux.type = elm->type; aux.leng = elm->c2_length; aux.addr = m_coreObject->m_rfcWa + elm->c2_offset; GlobalFunctions::CreateObjectForRFCField(target,aux,elm->decimals); GlobalFunctions::ReadRFCField(target,aux,elm->decimals); Where GlobalFunctions::CreateObjectForRFCField creates a System::String object filled with spaces (for padding) to what the unmanaged library states the max length should be: static void CreateObjectForRFCField(Object*& object, RFC_PARAMETER& par, unsigned dec) { switch (par.type) { case TYPC: object = new String(' ',par.leng / sizeof(_TCHAR)); break; // unimportant afterwards. } } And GlobalFunctions::ReadRFCField() copies the data from the library into the created String object and preserves the space padding: static void ReadRFCField(String* target, RFC_PARAMETER& par) { int lngt; _TCHAR* srce; switch (par.type) { case TYPC: case TYPDATE: case TYPTIME: case TYPNUM: lngt = par.leng / sizeof(_TCHAR); srce = (_TCHAR*)par.addr; break; case RFCTYPE_STRING: lngt = (*(_TCHAR**)par.addr != NULL) ? (int)_tcslen(*(_TCHAR**)par.addr) : 0; srce = *(_TCHAR**)par.addr; break; default: throw new DotNet_Incomp_RFCType2; } if (lngt > target->Length) lngt = target->Length; GCHandle gh = GCHandle::Alloc(target,GCHandleType::Pinned); wchar_t* buff = reinterpret_cast<wchar_t*>(gh.AddrOfPinnedObject().ToPointer()); _wcsnset(buff,' ',target->Length); _snwprintf(buff,lngt,_T2WFSP,srce); gh.Free(); } Now, on occasion, we see access violations getting thrown in the _snwprintf call. My question really is: Is it appropriate to create a string padded to a length (ideally to pre-allocate the internal buffer), and then to modify the String using GCHandle::Alloc and the mess above. And yes, I know that System::String objects are supposed to be immutable - I'm looking for a definitive "This is WRONG and here is why". Thanks, Eli.

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  • Connection Refused running multiple environments on Selenium Grid 1.04 via Ubuntu 9.04

    - by ReadyWater
    Hello, I'm writing a selenium grid test suite which is going to be run on a series of different machines. I wrote most of it on my macbook but have recently transfered it over to my work machine, which is running ubuntu 9.04. That's actually my first experience with a linux machine, so I may be missing something very simple (I have disabled the firewall though). I haven't been able to get the multienvironment thing working at all, and I've been trying and manual reviewing for a while. Any recommendations and help would be greatly, greatly appreciated! The error I'm getting when I run the test is: [java] FAILED CONFIGURATION: @BeforeMethod startFirstEnvironment("localhost", 4444, "*safari", "http://remoteURL:8080/tutor") [java] java.lang.RuntimeException: Could not start Selenium session: ERROR: Connection refused I thought it might be the mac refusing the connection, but using wireshark I determined that no connection attempt was made on the mac . Here's the code for setting up the session, which is where it seems to be dying @BeforeMethod(groups = {"default", "example"}, alwaysRun = true) @Parameters({"seleniumHost", "seleniumPort", "firstEnvironment", "webSite"}) protected void startFirstEnvironment(String seleniumHost, int seleniumPort, String firstEnvironment, String webSite) throws Exception { try{ startSeleniumSession(seleniumHost, seleniumPort, firstEnvironment, webSite); session().setTimeout(TIMEOUT); } finally { closeSeleniumSession(); } } @BeforeMethod(groups = {"default", "example"}, alwaysRun = true) @Parameters({"seleniumHost", "seleniumPort", "secondEnvironment", "webSite"}) protected void startSecondEnvironment(String seleniumHost, int seleniumPort, String secondEnvironment, String webSite) throws Exception { try{ startSeleniumSession(seleniumHost, seleniumPort, secondEnvironment, webSite); session().setTimeout(TIMEOUT); } finally { closeSeleniumSession(); } } and the accompanying build script used to run the test <target name="runMulti" depends="compile" description="Run Selenium tests in parallel (20 threads)"> <echo>${seleniumHost}</echo> <java classpathref="runtime.classpath" classname="org.testng.TestNG" failonerror="true"> <sysproperty key="java.security.policy" file="${rootdir}/lib/testng.policy"/> <sysproperty key="webSite" value="${webSite}" /> <sysproperty key="seleniumHost" value="${seleniumHost}" /> <sysproperty key="seleniumPort" value="${seleniumPort}" /> <sysproperty key="firstEnvironment" value="${firstEnvironment}" /> <sysproperty key="secondEnvironment" value="${secondEnvironment}" /> <arg value="-d" /> <arg value="${basedir}/target/reports" /> <arg value="-suitename" /> <arg value="Selenium Grid Java Sample Test Suite" /> <arg value="-parallel"/> <arg value="methods"/> <arg value="-threadcount"/> <arg value="15"/> <arg value="testng.xml"/> </java>

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  • Regex: Search and replace left side = to right side

    - by ctrlShiftBryan
    How do I use regular expressions and search and replace to turn this [UserID] = <UserID, int,> [UserID] = 123123 [UserID] = asd123123 into [UserID] = [UserID] [UserID] = [UserID] [UserID] = [UserID] In other words I want to take everything from left side of the line up to the '=' character and replace everything on the right side of the '=' with the match from the left side. We can assume a line break at the end of each line. What are my Find what: and Replace with: values?

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  • Optimize mysql table ?

    - by fabien-barbier
    Here is my actual table schema (I'm using Mysql) : Table experiment : code(int) sample_1_id sample_2_id ... until ... sample_12_id rna_1_id rna_2_id ... until ... rna_12_id experiment_start How can I optimize both part : sample_n_id and rna_n_id (all are bigint(20) and allow null=true) ? About values : we can have : ex : sample_1_id = 2 , Sample_2_id = 5 , ... Note : values can be updated. Ideas ? Thanks.

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  • Swiping Images with Page Control in Iphone

    - by lakesh
    I am trying to make practice app where i can scroll images with page control. I am able to scroll images and able to include the page control. But the problem i face is i am not able to interlink the two. Meaning to say when I scroll the images, the page control is not affected and when i change the page control, the scrolling of the images is unaffected. I have referred to this: http://www.iosdevnotes.com/2011/03/uiscrollview-paging/ for the scrolling with page control. Viewcontroller.h #import <UIKit/UIKit.h> @interface ViewController : UIViewController <UIScrollViewDelegate>{ UIScrollView *scrollView; UIPageControl *pageControl; BOOL pageControlBeingUsed; } @property (nonatomic, retain) IBOutlet UIScrollView *scrollView; @property (nonatomic, retain) IBOutlet UIPageControl *pageControl; - (IBAction)changePage; @end Viewcontroller.m #import "ViewController.h" @interface ViewController () @end @implementation ViewController @synthesize scrollView,pageControl; - (void)viewDidLoad { [super viewDidLoad]; NSArray *images = [[NSArray alloc] initWithObjects:[UIImage imageNamed:@"1.jpeg"],[UIImage imageNamed:@"2.jpeg"],[UIImage imageNamed:@"3.jpeg" ], nil]; self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * images.count, self.scrollView.frame.size.height); for (int i = 0; i < images.count; i++) { CGRect frame; frame.origin.x = self.scrollView.frame.size.width * i; frame.origin.y = 0; frame.size = self.scrollView.frame.size; UIImageView* imgView = [[UIImageView alloc] init]; imgView.image = [images objectAtIndex:i]; imgView.frame = frame; [scrollView addSubview:imgView]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; self.scrollView = nil; } - (void)scrollViewDidScroll:(UIScrollView *)sender { // Update the page when more than 50% of the previous/next page is visible CGFloat pageWidth = self.scrollView.frame.size.width; int page = floor((self.scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1; self.pageControl.currentPage = page; } - (IBAction)changePage{ // update the scroll view to the appropriate page CGRect frame; frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage; frame.origin.y = 0; frame.size = self.scrollView.frame.size; [self.scrollView scrollRectToVisible:frame animated:YES]; pageControlBeingUsed = YES; } - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { pageControlBeingUsed = NO; } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { pageControlBeingUsed = NO; } @end Need some guidance on this... Thanks..

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  • Difficulties getting GraphViz working as a library in C++

    - by DistortedLojik
    Am working on a program that will allow a graph of nodes to be displayed and then updated visually as the nodes themselves are updated. I am fairly new to Visual Studio 2010 and am following the GraphViz guide located at http://www.graphviz.org/pdf/libguide.pdf in order to get GraphViz working as a library. I have the following code which is taken straight from the pdf linked above. #include <graphviz\gvc.h> #include <graphviz\cdt.h> #include <graphviz\graph.h> #include <graphviz\pathplan.h> using namespace std; int main(int argc, char **argv) { Agraph_t *g; Agnode_t *n, *m; Agedge_t *e; Agsym_t *a; GVC_t *gvc; /* set up a graphviz context */ gvc = gvContext(); /* parse command line args - minimally argv[0] sets layout engine */ gvParseArgs(gvc, argc, argv); /* Create a simple digraph */ g = agopen("g", AGDIGRAPH); n = agnode(g, "n"); m = agnode(g, "m"); e = agedge(g, n, m); /* Set an attribute - in this case one that affects the visible rendering */ agsafeset(n, "color", "red", ""); /* Compute a layout using layout engine from command line args */ gvLayoutJobs(gvc, g); /* Write the graph according to -T and -o options */ gvRenderJobs(gvc, g); /* Free layout data */ gvFreeLayout(gvc, g); /* Free graph structures */ agclose(g); /* close output file, free context, and return number of errors */ return (gvFreeContext(gvc)); } After compiling I get the following errors which indicate that I do not have it correctly linked. 1>main.obj : error LNK2019: unresolved external symbol _gvFreeContext referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _agclose referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _gvFreeLayout referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _gvRenderJobs referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _gvLayoutJobs referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _agsafeset referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _agedge referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _agnode referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _agopen referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _gvParseArgs referenced in function _main 1>main.obj : error LNK2019: unresolved external symbol _gvContext referenced in function _main Within the VC++ Directories I have C:\Program Files (x86)\Graphviz2.26.3\include in the Include Directories and C:\Program Files (x86)\Graphviz2.26.3\lib\release\lib in the Library Directories Any help would be greatly appreciated to help get this working. Thank you.

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  • Jquery request download/open file to the user

    - by CoffeeCode
    I have a Url that returns a file. How should my jquery request looklike to download this file to the user?? the action method looks like this public FileContentResult GetFile(int Id) { if (Id == 0) return File(new byte[0], ""); Survey survey = Repository.GetItem(Id); return File(survey.File.FileContent.ToArray(), survey.File.ContentType, survey.File.Name); }

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  • How can a not null constraint be dropped?

    - by Tomislav Nakic-Alfirevic
    Let's say there's a table created as follows: create table testTable ( colA int not null ) How would you drop the not null constraint? I'm looking for something along the lines of ALTER TABLE testTable ALTER COLUMN colA DROP NOT NULL; which is what it would look like if I used PostgreSQL. To my amazement, as far as I've been able to find, the MySQL docs, Google and yes, even Stackoverflow (in spite of dozens or hundreds of NULL-related questions) don't seem to lead towards a single simple SQL statement which will do the job.

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  • ssL HTTPS for windows mobile 6::unable to read transport connection

    - by Santhosh
    Hi am trying Https ssl connection in my C# application...i am getting "Unable to read transport connection" for the line WebResponse response = (HttpWebResponse)request.GetResponse(); I am forcing Certificate to be accepted ServicePointManager.CertificatePolicy = new MyPolicy(); public class MyPolicy : ICertificatePolicy { public bool CheckValidationResult(ServicePoint sp, X509Certificate cert, WebRequest req, int problem) { return true; } } Working fine in WM5 may i plz know the wat is goin wrong?plz thanks in advance

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  • How can I simulate all mouse and keyboard events in Qt that works on Linux and Windows?

    - by S.Mohammadi
    Problem: I have a device that send to me some commands (e.g: 1,2,3,...), i want simulate mouse and keyboard events according to received commands in Both Linux OS and Windows OS. I worked with bool QCoreApplication::postEvent(QObject *receiver, QEvent *event, int priority = Qt::NormalEventPriority) but i don't know what receiver pass to it and i has problem with MouseMove action with it. I found this help that works good in linux OS, but i have problem with this help approach in Windows OS. Is there any approach that works in both OS? Thanks for your attention.

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