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• How to get arc4Sin() output into label/NSString

  - by Moshe

  I'm trying to take the output of arc4sin and put it into a label. (EDIT: You can ignore this and just post sample code, if this is too irrelevant.) I've tried: // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; NSString *number = [[NSString alloc] stringWithFormat: @"%@", arc4random() % 9]; label.text = number; } I've created an IBOutlet for "label" and connected it. What's wrong here?

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• gae xmpp outbound service

  - by cometta

  currently i create xmppservlet like below public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException { JID jid = new JID("[email protected]"); Message msg = new MessageBuilder() .withRecipientJids(jid) .withBody("hi Hello i'm a fancy GAE app, how are you?") .build(); XMPPService xmpp = XMPPServiceFactory.getXMPPService(); SendResponse status = xmpp.sendMessage(msg); } by doing this, from [email protected], i need to send a message to [email protected] only, will [email protected] send out the message back to [email protected]. Is there anyway to programatically send out xmpp message without having [email protected] to initial chat window with [email protected] and send the first message? This should be consider outbound-service right? how to do this?

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• How to highlight text automatically inside an UIAlertView text field

  - by user333624

  Hello everyone I have an UIAlertView with a textfield that shows a default value and two buttons, one to cancel and the other one to confirm. What I am trying to do is that when the alert view is popped up the default value is highlighted so the user can override the whole value faster than manually erasing it. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Continue",nil]; [alerta addTextFieldWithValue:@"87893" label:@"value"]; UITextField *textField = [alert textField]; campoTexto.highlighted = YES; campoTexto.keyboardType = UIKeyboardTypeNumbersAndPunctuation; [alertt show]; [alert release]; } for some reason there is a highlighted attribute for the textfield but it doesn't seem to work and there is no trail of that attribute in the Class documentation.

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• Dynamic table in Asp.Net

  - by Sivakumar

  Hi guys here I've created d dynamic table and how can i set d properties of the table like height, width and etc? Pls help me.. Thanks... code private void GenerateTable(int rowsCount) { Table table = new Table(); for (int i = 0; i < rowsCount; i++) { TableRow row = new TableRow(); TableCell cell = new TableCell(); TextBox tb1 = new TextBox(); DropDownList drp1 = new DropDownList(); tb1.ID= "dname"+i;drp1.ID = "relation" + i; cell.Controls.Add(tb1); cell.Controls.Add(drp1); row.Cells.Add(cell);table.Rows.Add(row); } rowsCount++; ViewState["RowsCount"] = rowsCount; }

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• How to access the backing field of an inherited class using fluent nhibernate

  - by Akk

  How do i set the Access Strategy in the mapping class to point to the inherited _photos field? public class Content { private IList<Photo> _photos; public Content() { _photos = new List<Photo>(); } public virtual IEnumerable<Photo> Photos { get { return _photos; } } public virtual void AddPhoto() {...} } public class Article : Content { public string Body {get; set;} } I am currently using thw following to try and locate the backing field but an exception is thrown as it cannot be found. public class ArticleMap : ClassMap<Article> { HasManyToMany(x => x.Photos) .Access.CamelCaseField(Prefix.Underscore) //_photos //... } i tried moving the backing field _photos directly into the class and the access works. So how can i access the backing field of an inherited class?

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• INotifyPropertyChange ~ PropertyChanged not firing when property is a collection and a new item is a

  - by eponymous23

  I have a class that implements the INotifyPropertyChanged interface. Some of the properties of the class are of type List. For example: public List<string> Answers { get { return _answers; } set { _answers = value; onPropertyChanged("Answers") } } ... private void onPropertyChanged(string propertyName) { if(this.PropertyChanged != null) this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } If I assign a new List<string> to Answer, then the PropertyChanged event fires as expected; but if I add a string string to the Answer list using the List Add method, then PropertyChanged event doesn't fire. I was considering adding an AddAnswer() method to my class, which would handle calling the lists's Add method and would call onPropertyChanged() from there, but is that the right way to do it? Is there a more elegant way of doing it? Cheers, KT

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• Hiding/Unhiding Control in Gridview’s column - shifting problem

  - by lupital

  This is a follow up to my previous question: link text In gridview's column i have a linkbutton and a label under it. I want to hide/unhide label when linkbutton is clicked. I use javascript because i don't want any postbacks. The code: protected void gvwComments_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lButton = ((LinkButton)e.Row.Cells[2].FindControl("lbtnExpand")); Label label = ((Label)e.Row.Cells[2].FindControl("lblBody")); lButton.Attributes.Add("onclick", string.Format("HideLabel('{0}'); return false;", label.ClientID)); } } function HideLabel(button) { var rowObj = document.getElementById(button); if (rowObj.style.display == "none") { rowObj.style.display = "block"; } else { rowObj.style.display = "none"; } } The problem is that when I unhide the label by clicking on button, linkbutton is shifted a a bit upper it's original position in the cell. Is it possible to preserve linkbutton's position in the gridviews cell?

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• zooming from a particular point

  - by Chandan Shetty SP

  I am using this code to zoom from a particular point CGPoint getCenterPointForRect(CGRect inRect) { CGRect screenRect = [[UIScreen mainScreen] bounds]; return CGPointMake((screenRect.size.height-inRect.origin.x)/2,(screenRect.size.width-inRect.origin.y)/2); } -(void) startAnimation { CGPoint centerPoint = getCenterPointForRect(self.view.frame); self.view.transform = CGAffineTransformMakeTranslation(centerPoint.x, centerPoint.y); self.view.transform = CGAffineTransformScale( self.view.transform , 0.001, 0.001); [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:kTransitionDuration]; self.view.transform = CGAffineTransformIdentity; [UIView commitAnimations]; } Its not working. What is the correct way to do zooming from a particular point.

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• Mouse stops working after changing function

  - by heyohletsgo

  I'm making a console board game on c++, and i've been able to make the mouse work in the first function, the menu one, however, when i get to the getmove function and need to click on a house, it simply doesn't work.. Can anyone help? This is the class with the mouse. #include <cstdlib> #include <iostream> #include <process.h> #include <windows.h> #include <time.h> #include <stdio.h> using namespace std; void Game(); int Chu(); int rato(int &row, int &col) { HANDLE hIn; hIn = GetStdHandle(STD_INPUT_HANDLE); bool Continue = TRUE; INPUT_RECORD InRec; DWORD NumRead; HWND window = GetConsoleWindow(); POINT cursorPos; RECT wpos; int x = 0; int y = 0; //cout << hIn << endl; FlushConsoleInputBuffer(hIn); while (Continue) { ReadConsoleInput(hIn, &InRec, 1, &NumRead); switch (InRec.EventType) { case MOUSE_EVENT: if (GetAsyncKeyState(VK_LBUTTON)) { cout << "RATO"<<endl; GetWindowRect(window, &wpos); GetCursorPos(&cursorPos); cursorPos.x -= wpos.left; cursorPos.y -= wpos.top; x = (cursorPos.x - 5) / 16; y = (cursorPos.y - 25) / 24; cout << x << " " << y << endl; row = x; col = y; return row; } else if (GetAsyncKeyState(VK_RBUTTON)){ GetWindowRect(window, &wpos); GetCursorPos(&cursorPos); cursorPos.x -= wpos.left; cursorPos.y -= wpos.top; x = (cursorPos.x - 5) / 16; y = (cursorPos.y - 25) / 24; cout << x << " " << y << endl; row = x; col = y; return row; } break; } } } int main() { cout << "\n\n\n click on the stars" << endl; cout << " \n\n\n *******" << endl; int z = 0; int x = 0; int y = 0; int xo = 0; switch (rato(x,y)) { case 1: Game(); break; case 2: Game(); break; case 3: Game(); break; case 4: rato(x, y); break; case 5: rato(x, y); break; case 6: Game(); break; case 7: Game(); break; case 8: Game(); break; case 9: Game(); break; default: cout << "click again"; break; } return 0; } void Game() { int x = 0; int y = 0; int i = 0; cout << "GAME" << endl; do{ i++; rato(x, y); } while (i <= 2); Chu(); } int Chu() { int x = 0; int y = 0; int a = 0; int b = 0; int xo = 0; int yo = 0; cout << "\ click on the stars" << endl; HANDLE hConsole; hConsole = GetStdHandle(STD_OUTPUT_HANDLE); do{ xo = rato(x, y); if (0 <= xo && xo <= 5) { a = 1;} else cout << "CLICK AGAIN" << endl; } while (xo!=0); cout << a; return a; system("PAUSE"); }

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• Concatenating NSString inside of UITextView

  - by Jason

  I'm some trouble adding strings together for a UITextView in my app. The method I've been using is this (header) #import <UIKit/UIKit.h> @interface calculatorViewController : UIViewController { IBOutlet UITextView *output; } -(IBAction)b1; @property(nonatomic, copy) NSString *output; @end (main) #import "calculatorViewController.h" @implementation calculatorViewController -(void)b1 { [output stringByAppendingString:@"hi"]; } The problem I've been having with this method is when I use the button the app crashes. The warning it gives me is 'UITextView' may not respond to '-stringByAppendingString:' When I replace output with at string it works though and that confused me. Any suggestions? Am I doing something wrong? Thanks

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• audio power on AudioQueue

  - by Tomoyuki

  Hi everyone. I'm now creating an Application using speech recognition.To check the Audio Power coming in through the microphone, I wrote a method as follows. -(void)checkPower(AudioqueRef)queue{ UInt32 expectedSize= sizeof(AudioQueueLevelMeterState); AudioQueueGetProperty(queue, kAudioQueueProperty_CurrentLevelMeter, audioLevels, expectedSize); NSLog(@"average:%f peak:%f",audioLevels.mAveragePower,audioLevels.mPeakPower); } I found that sometimes mAveragePower was larger than mPeakPower, and when mAveragePower was 1.0, in other words, averagePower is regarded as max, mPeakPower was lower than 1.0. I think that generally this result is inpossible. please Let me know if you have any information about sound power on CoreAudio. thanks.

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• Turning a refresh ImageView into a ProgressBar

  - by Macarse

  I am doing a custom title for my android app and I want to have a refresh button like the Twitter app. I am using a RelativeLayout an my ImageView is defined by: <ImageView android:id="@+id/title_refresh" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_menu_refresh" android:layout_alignParentRight="true"> </ImageView> In my Activity I have something like this: refreshView = (ImageView) findViewById(R.id.title_refresh); refreshView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { /* Make the refreshView turn into a progress bar. */ startService(new Intent(MyActivity.this, MyService.class)); } } I would like the ImageView to turn into a ProgressBar while I wait for my service to finish processing. How is the correct way to do this?

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• Passing Data thru NSTimer UserInfo

  - by zorro2b

  I a trying to pass data thru userInfo for an NSTimer call. What is the best way to do this? I am trying to use an NSDictionary, this is simple enough when I have objective c objects, but what about other data? I want to do something like this, which doesn't work as is: - (void) play:(SystemSoundID)sound target:(id)target callbackSelector:(SEL)selector { NSLog(@"pause ipod"); [iPodController pause]; theSound = sound; NSMutableDictionary *cb = [[NSMutableDictionary alloc] init]; [cb setObject:(id)&sound forKey:@"sound"]; [cb setObject:target forKey:@"target"]; [cb setObject:(id)&selector forKey:@"selector"]; [NSTimer scheduledTimerWithTimeInterval:0 target:self selector: @selector(notifyPause1:) userInfo:(id)cb repeats:NO]; }

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• Issue with child of custom Decorator class in WPF (c#)

  - by galacticgrug

  I need a custom border that renders a little differently than a normal border. I made a class that inherited from Decorator as follows class BetterBorder : Decorator { protected override Size ArrangeOverride(Size arrangeSize) { return arrangeSize; } protected override void OnRender(DrawingContext dc) { //these values are calculated elsewhere dc.DrawGeometry(backgroundBrush, borderPen, pathGeometry); } } //Properties and helper methods below this All of this works fine until I try to add a child to the control, the control can be added but is not visible and seems to be moved off BetterBorders visible client area. If I inherit from Border everything works fine, what am I missing?

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• C# - Dictionary with generic array as value

  - by alhazen

  In my class, I want to use a dictionary with the following declaration: Dictionary<string, T[]> Since the operations of my class are exactly the same for all generic types, I do not wish to define my class as generic (which means I would have to create a separate instance of my class for each generic type I insert into the dictionary ?). One alternative I'm attempting is to use Dictionary<string, object> instead: public void Add<T>(string str, T value) { // Assuming key already exists var array = (T[]) dictionary[str]; array[0] = value; } However, when iterating over the dictionary, how do I cast the object value back to an array ? foreach(string strKey in dictionary.Keys) { var array = (T[]) dictionary[strKey]; // How to cast here ? //... array[0] = default(T); } Thanks.

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• Communication between layers in an application

  - by Petar Minchev

  Hi guys! Let's assume we have the following method in the business layer. What's the best practice to tell the UI layer that something went wrong and give also the error message? Should the method return an empty String when it was OK, otherwise the error message, or should it throw another exception in the catch code wrapping the caught exception? If we choose the second variant then the UI should have another try,catch which is too much try,catch maybe. Here is a pseudocode for the first variant. public String updateSomething() { try { //Begin transaction here dataLayer.do1(); dataLayer.do2(); dataLayer.doN(); } catch(Exception exc) { //Rollback transaction code here return exc.message; } return ""; } Is this a good practice or should I throw another exception in the catch(then the method will be void)?

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• How can I change what happens when "enter" key is pressed on a DataGridView?

  - by SO give me back my rep

  when I am editing a cell and press enter the next row is automatically selected, I want to stay with the current row... I want to happen nothing except the EndEdit. I have this: private void dtgProductos_CellEndEdit(object sender, DataGridViewCellEventArgs e) { dtgProductos[e.ColumnIndex, e.RowIndex].Selected = true; //this line is not working var index = dtgProductos.SelectedRows[0].Cells.IndexOf(dtgProductos.SelectedRows[0].Cells[e.ColumnIndex]); switch (index) { case 2: { dtgProductos.SelectedRows[0].Cells[4].Selected = true; dtgProductos.BeginEdit(true); } break; case 4: { dtgProductos.SelectedRows[0].Cells[5].Selected = true; dtgProductos.BeginEdit(true); } break; case 5: { btnAddProduct.Focus(); } break; default: break; } } so when I edit a row that is not the last one I get this error: Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.

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• Drawing random circles

  - by ViktorC

  I am trying to draw a cupola circles at random positions in an Android application. I draw them on a bitmap and then draw that bitmap on the canvas. This is the function where a draw the circles: private void drawRandomCircles(int numOfCircles) { Canvas c = new Canvas(b); Paint cPaint = new Paint; cPaitn.setColor(Color.RED); for(int i = 0; i < numOfCircles; i++) { int x = Math.Random % 100; int y = Math.Random % 100; c.drawCircle(x, y, 20, cPaint) } } The Bitmap b is global. And after calling this function I just draw the bitmap in the onDraw method. Now the problem is that I only get one circle drawn on the screen, no matter the size of numOfCircles. Any clue what is happening here?

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• rewrite a function using only pointer increment/decrement

  - by Richard Nguyen

  can anyone help me rewrite the function i wrote below using only points and pointer increment/decrement? I dont have much experience with pointer so I dont know what to do. void reverse(char * s) { int i, l = strlen(s); char c; for(i = 0; i < (l >> 1); i++) { c = s[i]; s[i] = s[l - i - 1]; s[l - i - 1] = c; } } do not use pointer arithmetic or array notation. any help or hint on how to rewrite the function above is appriciated. Thanks!

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• How to pass the image from oneview to another view in iphone?

  - by Warrior

  I am new to iphone development.I want to display the image selected in a seperateview.I have used UIImagePickerController to pick the image from device library.On clicking the image i have to navigate to another view and display the image.How can i send the image o another view.I have used delegate methods for accessing string in other views.Is there any possibility to send the image via delegate methods. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img1 editingInfo:(NSDictionary *)editInfo { [[picker parentViewController] dismissModalViewControllerAnimated:YES]; EmailPictureViewController *email = [[EmailPictureViewController alloc] initWithNibName:@"EmailPictureViewController" bundle:nil]; [self.navigationController pushViewController:email animated:YES]; } From the above code i have to set delegates for img1 which is of type UIImage. Is there any other way to achieve my task.Please help me out.Thanks.

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• Best way to move an image across part of the screen?

  - by rushonerok

  I have a Silverlight WP7 app and an image on my page that I want to appear to slide across the screen. What is the best way of doing this? I wrote this real quick but the UI doesn't update until the entire method is done. private void SpinImg(Image img, double left) { for(int i = 1; i <= 10000; i++) { img.Margin = new Thickness(left, img.Margin.Top + 1, 0, 0); if(img.Margin.Top > 314) { //move it to the top img.Margin = new Thickness(left, -105, 0, 0); } int wait = 1000 / i; Thread.Sleep(wait); } }

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• Please help me translate C# code to Ruby

  - by Valentin Vasilyev

  Here is the code: using System; using System.Collections.Generic; using System.Linq; namespace cs2 { class Program { static void Main(string[] args) { var i=Fibs.TakeWhile(x=>x < 1000).Where(x=>x % 2==0).Sum(); } static IEnumerable<long> Fibs() { long a = 0, b = 1; while (true) { yield return b; b += a; a = b - a; } } } }

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• android: Check if a View is bringed to front

  - by user329692

  Hi Guys! I made a custom component which simple extends a WebView This component is used into activities that are loaded from a tabhost. This component creates a timertask too. I'd like to execute the task only if the activity that contains the component is visible. Ex: public class MyWebView extends WebView { public MyWebView(Context context, AttributeSet as) { super(context,as); /** More code **/ TimerTask ttask = new TimerTask() { @Override public void run() { if (iamvisible) doStuff(); } }; timer = new Timer(); timer.schedule(ttask, refreshInterval * 1000, refreshInterval * 1000); } } How can I set the iamvisible variable? I tried overriding onWindowFocusChanged and onWindowVisibilityChanged but with no luck Regards in advance

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• ASP.NET Thread Safety in aspx.cs code behind file

  - by Tim Michalski

  I am thinking of adding a DataContext as a member variable to my aspx.cs code-behind class for executing LinqToSql queries. Is this thread safe? I am not sure if a new instance of this code-behind class is created for each HTTP request, or if the instance is shared amongst all request threads? My fear is that I will get 10 simultaneous concurrent http requests that will be using the same database session. public partial class MyPage : System.Web.UI.Page { private DataContext myDB = new DataContext(); protected void MyAction_Click(object sender, EventArgs e) { myDB.DoWork(); } }

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• Using JSF, JPA and DAO. Without Spring?

  - by ich-bin-drin

  Hi, till now i still worked with JSF and JPA without DAOs. Now i'd like to use DAOs. But how can i initialize the EntityManager in the DAO-Classes? public class AdresseHome { @PersistenceContext private EntityManager entityManager; public void persist(Adresse transientInstance) { log.debug("persisting Adresse instance"); try { entityManager.persist(transientInstance); log.debug("persist successful"); } catch (RuntimeException re) { log.error("persist failed", re); throw re; } } } Have I to use Spring or is there a solution that works without Spring? Thanks.

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