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• Using GraphicsServices.h/GSEvent as well as compiling CLI iPhone tools with XCode

  - by Peter Hajas

  I sent this to KennyTM (has all the private framework headers on GitHub) but I figured I'd ask here too just in case someone has some good ideas or any way to help me out. I'm trying to write a command line utility that sends GSEvents to operate the keyboard, touch/drag elements onscreen, and operate hardware buttons (volume, home, sleep, etc.) I grabbed the MouseSupport code and tried to look through it, but I couldn't find the easiest way to send GSEvents. I'm hoping someone here can help me. First, what's the simplest way to declare a GSEvent and send it? I looked at the iPhone development wiki, but the documentation was very vague. I understand that there's a purple event port (?) that I have to send these events to, but I don't understand how to do that. Could someone offer examples for, say, touching at a coordinate, typing a certain key, or pressing a hardware button? Also, do I have to write or do anything special if I want this utility to operate all applications as well as Springboard? I don't know if this is a special case because I want it at the OS level. Ideally, I would SSH into the phone, start the program, and it would send GSEvents that would be handled by whatever application was open. As far as compiling this code, is there any way to do so under XCode? I don't know what sort of project template I should use (if any) and this is throwing me off. I don't need "build and go" support, I'm more than happy to scp the program over to the phone. I understand that compiling the code is also feasible on the phone. I have all of the headers from the SDK on my phone along with iphone-gcc, but when compiling some test programs I still get errors about not finding mach headers and CoreFoundation. Is there an easier way to do this? Lastly, are there other guides or pieces of literature that anyone can point me towards for learning more about this? I'm excited to get into open iPhone development (I have experience with the official SDK, but I want to go deeper). Thanks for any and all help people can offer!

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• Running a Java program with a .dll from Adobe AIR's native process

  - by Donny

  I would like to be able to operate a scanner from my AIR application. Since there's no support for this natively, I'm trying to use the NativeProcess class to start a jar file that can run the scanner. The Java code is using the JTwain library to operate the scanner. The Java application runs fine by itself, and the AIR application can start and communicate with the Java application. The problem seems to be that any time I attempt to use a function from JTwain (which relies on the JTwain.dll), the application dies IF AIR STARTED IT. I'm not sure if there's some limit about referencing dll files from the native process or what. I've included my code below Java code- while(true) { try { System.out.println("Start"); text = in.readLine(); Source source = SourceManager.instance().getCurrentSource(); System.out.println("Java says: "+ text); } catch (IOException e) { System.err.println("Exception while reading the input. " + e); } catch (Exception e) { System.out.println("Other exception occured: " + e.toString()); } finally { } } } Air application- import mx.events.FlexEvent; private var nativeProcess:NativeProcess; private var npInfo:NativeProcessStartupInfo; private var processBuffer:ByteArray; private var bLength:int = 0; protected function windowedapplication1_applicationCompleteHandler(event:FlexEvent):void { var arg:Vector.<String> = new Vector.<String>; arg.push("-jar"); arg.push(File.applicationDirectory.resolvePath("Hello2.jar").nativePath); processBuffer = new ByteArray; npInfo = new NativeProcessStartupInfo; npInfo.executable = new File("C:/Program Files/Java/jre6/bin/javaw.exe"); npInfo.arguments = arg; nativeProcess = new NativeProcess; nativeProcess.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, onStandardOutputData); nativeProcess.start(npInfo); } private function onStandardOutputData(e:ProgressEvent):void { tArea.text += nativeProcess.standardOutput.readUTFBytes(nativeProcess.standardOutput.bytesAvailable); } protected function button1_clickHandler(event:MouseEvent):void { tArea.text += 'AIR app: '+tInput.text + '\n'; nativeProcess.standardInput.writeMultiByte(tInput.text + "\n", 'utf-8'); tInput.text = ''; } protected function windowedapplication1_closeHandler(event:Event):void { nativeProcess.closeInput(); } ]]> </fx:Script> <s:Button label="Send" x="221" y="11" click="button1_clickHandler(event)"/> <s:TextInput id="tInput" x="10" y="10" width="203"/> <s:TextArea id="tArea" x="10" width="282" height="88" top="40"/> I would love some explanation about why this is dying. I've done enough testing that I know absolutely that the line that kills it is the SourceManager.instance().getCurrentSource(). I would love any suggestions. Thanks.

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• Cannot pull correct data from a Javascript array into an HTML form

  - by Isaac

  I am trying to return the description value of the corresponding author name and book title(that are typed in the text boxes). The problem is that the first description displays in the text area no matter what. <h1>Bookland</h1> <div id="bookinfo"> Author name: <input type="text" id="authorname" name="authorname"></input><br /> Book Title: <input type="text" id="booktitle" name="booktitle"></input><br /> <input type="button" value="Find book" id="find"></input> <input type="button" value="Clear Info" id="clear"></input><br /> <textarea rows="15" cols="30" id="destin"></textarea> </div> JavaScript: var bookarray = [{Author: "Thomas Mann", Title: "Death in Venice", Description: "One of the most famous literary works of the twentieth century, this novella embodies" + "themes that preoccupied Thomas Mann in much of his work:" + "the duality of art and life, the presence of death and disintegration in the midst of existence," + "the connection between love and suffering and the conflict between the artist and his inner self." }, {Author: "James Joyce", Title: "A portrait of the artist as a young man", Description: "This work displays an unusually perceptive view of British society in the early 20th century." + "It is a social comedy set in Florence, Italy, and Surrey, England." + "Its heroine, Lucy Honeychurch, struggling against straitlaced Victorian attitudes of arrogance, narroe mindedness and sobbery, falls in love - while on holiday in Italy - with the socially unsuitable George Emerson." }, {Author: "E. M. Forster", Title: "A room with a view", Description: "This book is a fictional re-creation of the Irish writer'sown life and early environment." + "The experiences of the novel's young hero,unfold in astonishingly vivid scenes that seem freshly recalled from life" + "and provide a powerful portrait of the coming of age of a young man ofunusual intelligence, sensitivity and character. " }, {Author: "Isabel Allende", Title: "The house of spirits", Description: "Allende describes the life of three generations of a prominent family in Chile and skillfully combines with this all the main historical events of the time, up until Pinochet's dictatorship." }, {Author: "Isabel Allende", Title: "Of love and shadows", Description: "The whole world of Irene Beltran, a young reporter in Chile at the time of the dictatorship, is destroyed when" + "she discovers a series of killings carried out by government soldiers." + "With the help of a photographer, Francisco Leal, and risking her life, she tries to come up with evidence against the dictatorship." }] function searchbook(){ for(i=0; i &lt; bookarray.length; i++){ if ((document.getElementById("authorname").value &amp; document.getElementById("booktitle").value ) == (bookarray[i].Author &amp; bookarray[i].Title)){ document.getElementById("destin").value =bookarray[i].Description return bookarray[i].Description } else { return "Not Found!" } } } document.getElementById("find").addEventListener("click", searchbook, false)

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• activeX component in axapta

  - by Nico

  hi folks, i'm struggling with an .net activeX i try to use in ms axapta 2009. using this component on my local machine where it was compiled, it's working quite fine. it can be added as activeX element on a form, the methods and events are listed in the axapta-activeX-explorer and i can interact with it without any problems. but trying to distribute the dll to other clients isn't working as intended. the registration of the dll via regasm /codebase /tlb works properly - getting the message, registration was successful. the component is also listed when selecting an activeX-element to add in ax, but neither functions nor properties are listed. and launching the form results in an errormessage - activeX component CLSID ... not found on system, not installed. the classID is indeed the one, defined in .net. strange things happen, having a look on the task-manager. the activeX-component itself is just a wrapper to interact with a com-application. when launching the ax-form with the not working and _not_installed_!! activeX-thing, the taskmanager shows a new process of the com-application, which is instanciated by the activeX :/ things i tried: using different versions of regasm, eg \Windows\Microsoft.NET\Framework\v2.0.50727 ; C:\Windows\Microsoft.NET\Framework64\v2.0.50727 using new GUIDs in .net, prior removing the old ones from the registry compiling, using different versions of the .net framework doing registration via regasm, regasm /codebase, regasm /codebase /tlb, using a visual-studio-setup running registration via command-line as administrator running setup as administrator running even ax as administrator on client-machine moving dll to a different folder followed by new registration ( windows/system32; ax/client/bin ) installing to GAC ( gacutil /i ) different project-options in visual studio ( COM-Visibility; register for COM-Interop; different targetPlatform ) hoped for the fact, that compiling in visual studio with register for COM-Interop option enabled does something more than just the regasm-registration, i used a registry-monitor-microsoft-tool for logging the registry-activity which happend during compilation. using these logs to create all registry-entries on the target-client in addition didn't work either. any hints or help would be so much appreciated! this thing is blocking me for days now :(

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• Have Button re-appear immediately after clicking button in ListView row

  - by Soeren

  I have 4 buttons on a page. Each button opens a modal window and let’s the user input data in a form. When the user hits the save button in the modal, a ListView appears on the page with the submitted data. The button the user clicked to open the modal window is set to visible=false, so it’s gone when the row is added to the ListView. Now there are 3 buttons and the same goes for those; when the user hits a button, a modal appears, and when the modal form is submitted, the button disappears and a row is added to the ListView. In the ListView row, there is a delete button. When this button is clicked, the row is deleted and the button that was initially clicked to add this row (and open the modal), SHOULD reappear, but it doesn’t. The row disappears, but I have to refresh the page before the button comes back. There is a ScriptManager on the masterpage, so I guess this is an AJAX partial refresh issue. I tried adding different events, but I can’t find the one that fires at the right time. I use an ObjectDataSource to fill the ListView, and the data comes from a database, wrapped in a business object. This code loads a business object in a List< and checks if the user inserted an item of a specific type. If he did, the button he used to open the modal is hidden. This works fine (maybe not the most elegant) _goals = GoalManager.GetGoalsByUser(UserID); if (_goals != null) { foreach (Goal _goalinlist in _goals) { if (_goalinlist.GoalType == 1) { Button1.Visible = false; goalid1 = true; } if (_goalinlist.GoalType == 2) { Button2.Visible = false; goalid2 = true; } if (_goalinlist.GoalType == 3) { Button3.Visible = false; goalid3 = true; } if (_goalinlist.GoalType == 4) { Button4.Visible = false; goalid4 = true; } } } As you can see, I tried setting a boolean, and then check it when the page is re-loaded. But the problem (I guess) is that the whole page isn't refreshed when the delete button is clicked in the ListView. This is the delete button in the ListView: <asp:ImageButton ID="ImageButton2" runat="server" CommandName="Delete" CausesValidation="false" ToolTip="Delete" CommandArgument='<%#Eval("GoalID")%>' ImageUrl="delete.gif" OnClientClick="return confirm('Delete this post?');" CssClass="button"/> I guess the question is, how do I make the button re-appear right after the ListView button is clicked?

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• Accessing UI context from asynch task

  - by cdonner

  I came across this android example that runs an AsyncTask from a UI thread. The class ExportDatabaseTask is declared and instantiated in the Activity, and apparently it is possible to reference the activity's UI context from the onPreExecute and onPostExecute events, like this: public class ManageData extends Activity { private ExportDatabaseTask exportDatabaseTask; [...] @Override public void onCreate(final Bundle savedInstanceState) { [...] ManageData.this.exportDatabaseTask = new ExportDatabaseTask(); ManageData.this.exportDatabaseTask.execute(); [...] } private class ExportDatabaseTask extends AsyncTask<String, Void, Boolean> { private final ProgressDialog dialog = new ProgressDialog(ManageData.this); protected void onPreExecute() { this.dialog.setMessage("Exporting database..."); this.dialog.show(); } protected Boolean doInBackground(final String... args) { [...] } protected void onPostExecute(final Boolean success) { if (this.dialog.isShowing()) { this.dialog.dismiss(); } } } I am trying to refactor this so that the ExportDatabaseTask is declared in another class that is not the Activity, for various reasons, and I can't quite figure out how to make it work. I am lacking some basic Java concepts here, which I readily admit. Specifically, myActivity is null in onPreExecute(). Why is that? public void onClick(View v) { Exporter ex = new Exporter(getApplicationContext(), ActivityMain.this); ex.exportDatabaseTask.execute(); } public class Exporter { public ExportDatabaseTask exportDatabaseTask; public Exporter(Context ctx, ActivityMain act) { myContext = ctx; myActivity = act; this.exportDatabaseTask = new ExportDatabaseTask(); } public class ExportDatabaseTask extends AsyncTask<Void, Void, Boolean> { private final ProgressDialog dialog = new ProgressDialog(myContext); // can use UI thread here? protected void onPreExecute() { // ====> this throws a Nullpointer exception: myActivity.dialog.setMessage("Exporting database..."); myActivity.dialog.show(); } protected Boolean doInBackground(final Void... args) { } protected void onPostExecute(final Boolean success) { if (myActivity.dialog.isShowing()) { myActivity.dialog.dismiss(); } } } }

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• UITableView having one Cell with multiple UITextFields (some of them in one row) scrolling crazy

  - by Allisone

  I have a UITableView (grouped). In that tableview I have several UITableViewCells, some custom with nib, some default. One Cell (custom) with nib has several UITextfields for address information, thus also one row has zip-code and city in one row. When I get the keyboard the tableview size seems to be adjusted automatically (vs. another viewController in the app with just a scrollview where I had to code this functionality on my own) so that i can scroll to the bottom of my tableview (and see it) even though the keyboard is up. That's good. BUT when I click on a textfield the tableview gets either scrolled up, or down, I can't figure out the logic. It seems to be rather random up/down scrolling / contentOffset setting. So I have bound the Editing Did Begin events of the textfields to a function that has this code. - (IBAction)textFieldDidBeginEditing:(UITextField *)textField { CGPoint pt; CGRect rc = [textField bounds]; rc = [textField convertRect:rc toView:self.tableView]; pt = rc.origin; pt.x = 0; [self.tableView setContentOffset:pt animated:YES]; ... } This, well, it seems to work most of the time, BUT it doesn't work if I click the first textfield (the view jumps so that the second row gets to the top and the first row is out of the current visible view frame) AND it also doesn't work if I first select the zip textfield and next the city textfield (both in one row) or vice versa. If I do so, the tableview seems to jump to the (grouped tableview) top of my viewForHeaderInSection(this section with this mentioned cell with all my textfields) What is is going on ? Why is this happening ? How to fix this ? Edit This on the other hand behaves as expected (for the two Textviews wit same origin.y) if (self.tableView.contentOffset.y == pt.y) { pt.y = pt.y + 1; [self.tableView setContentOffset:pt animated:YES]; }else { [self.tableView setContentOffset:pt animated:YES]; } But this is a stupid solution. I wouldn't like to keep it that way. And this also doesn't fix the wrong jumping, when clicking the first textfield at first.

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• ASP.NET MVC Consume JSONResult in Bing Maps API

  - by rockinthesixstring

  I know there are a few topics on this, but I seem to be fumbling my way through with no results. I'm trying to use a controller to return JSON results to my Bin Maps functions. Here's what I have for my controller (yes it is properly returning JSON data. Function Regions() As JsonResult Dim rj As New List(Of RtnJson)() rj.Add(New RtnJson("135 Bow Meadows Drive, Cochrane, Alberta", "desc", "title")) rj.Add(New RtnJson("12 Bowridge Dr NW, Calgary, Alberta, Canada", "desc2", "title2")) Return Json(rj, JsonRequestBehavior.AllowGet) End Function Then in my script I have this, but it's not working. <script type="text/javascript"> var map = null; var centerLat = 51.045 ; var centerLon = -114.05722; var json_object = $.getJSON("<%: Url.Action("Regions", "Events")%>"); function LoadMap() { map = new VEMap('bingMap'); map.LoadMap(new VELatLong(centerLat, centerLon), 10); $.each(json_object, function () { alert(this.address); //this alert is returning "address is undefined" StartGeocoding(this.address, this.title, this.desc); }); } function StartGeocoding(address, title, desc) { map.Find(null, // what address, // where null, // VEFindType (always VEFindType.Businesses) null, // VEShapeLayer (base by default) null, // start index for results (0 by default) null, // max number of results (default is 10) null, // show results? (default is true) null, // create pushpin for what results? (ignored since what is null) true, // use default disambiguation? (default is true) false, // set best map view? (default is true) GeocodeCallback); // call back function } function GeocodeCallback(shapeLayer, findResults, places, moreResults, errorMsg) { var bestPlace = places[0]; // Add pushpin to the *best* place var location = bestPlace.LatLong; var newShape = new VEShape(VEShapeType.Pushpin, location); var desc = "Latitude: " + location.Latitude + "<br>Longitude:" + location.Longitude; newShape.SetDescription(desc); newShape.SetTitle(bestPlace.Name); map.AddShape(newShape); } $(document).ready(function () { LoadMap(); }); </script>

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• Limit for Google calendar SMS notification per day

  - by pit777

  What is the limit for Google calendar SMS notification per day? How to detect I reached sms limit? Google write only this: http://www.google.com/support/calendar/bin/answer.py?hl=en&answer=36589 You might have reached the limit for SMS notifications. There is a limit to the number of SMS notifications you can receive each day. This limit shouldn't affect most users, but it's something to keep in mind if you've scheduled a large number of events and are no longer receiving SMS notifications. I created sms reminder based on google calendar api(apps-script), but I think now I reached the daily limit for SMS notifications... but google not informed what is exactly amount of sms limit restriction :/ function emailNotification() { // POWIADOMIENIA SMS O NOWEJ POCZCIE var calendarID = "[email protected]"; // id kalendarza o nazwie „sms4email” var gmailLabelTODO = "autoscriptslabels/sms"; // etykieta „AutoScriptsLabels/SMS” var gmailLabelDONE = "done/_sms"; // etykieta „DONE/_SMS” var calendarEventDescription = "this-is-sms_notification-mark"; // etykieta utworzonego zdarzenia, dzieki której mozna bedzie je znalezc podczas kasowania var calendar = CalendarApp.getCalendarById(calendarID); // otwieramy kalendarz var threads = GmailApp.getUserLabelByName(gmailLabelTODO).getThreads(); // zmienna przechowujaca kolekcje lancuszków z etykieta TODO var now = new Date(); if(threads == 0) return; // zaprzestanie wykonywania, jezeli brak nowych lancuszków for(i in threads) // tworzymy zdarzenia { var title = threads[i].getFirstMessageSubject(); // tytul emaila var startDate = new Date(now.getTime()+120000); var endDate = new Date(now.getTime()+120000); var messages = threads[i].getMessages(); var senderEmail = messages[0].getFrom(); // nadawca emaila var advancedArgs = {location:senderEmail, description:calendarEventDescription}; calendar.createEvent(title, startDate, endDate, advancedArgs); } Utilities.sleep(1000); GmailApp.getUserLabelByName(gmailLabelDONE).addToThreads(threads); // dodawanie etykiety DONE Utilities.sleep(1000); GmailApp.getUserLabelByName(gmailLabelTODO).removeFromThreads(threads); // usuwanie etykiety TODO Utilities.sleep(120000); // czekamy az kalendarz wysle SMS var TodaysEvents = calendar.getEventsForDay(now); for (i in TodaysEvents) // wyszukiwanie wedlug zdarzenia i kasowanie po wyslaniu { if (TodaysEvents[i].getDescription()==calendarEventDescription) TodaysEvents[i].deleteEvent(); } }

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• i don't solve "must declare a body because it is not marked abstract, extern, or partial" problem?

  - by programmerist

  How can i solve "must declare a body because it is not marked abstract, extern, or partial". This problem. Can you show me some advices? Full Error message is about Save, Update, Delete, Select events... Full message sample : GenoTip.DAL._AccessorForSQL.Save(string, System.Collections.Specialized.ListDictionary, System.Data.CommandType)' must declare a body because it is not marked abstract, extern, or partial This error also return in Update, Delete, Select... public abstract class _AccessorForSQL { public virtual bool Save(string sp, ListDictionary ld, CommandType cmdType); public virtual bool Update(); public virtual bool Delete(); public virtual DataSet Select(); } class GenAccessor : _AccessorForSQL { DataSet ds; DataTable dt; public override bool Save(string sp, ListDictionary ld, CommandType cmdType) { SqlConnection con = null; SqlCommand cmd = null; SqlDataReader dr = null; try { con = GetConnection(); cmd = new SqlCommand(sp, con); con.Open(); cmd.CommandType = cmdType; foreach (string ky in ld.Keys) { cmd.Parameters.AddWithValue(ky, ld[ky]); } dr = cmd.ExecuteReader(); ds = new DataSet(); dt = new DataTable(); ds.Tables.Add(dt); ds.Load(dr, LoadOption.OverwriteChanges, dt); } catch (Exception exp) { HttpContext.Current.Trace.Warn("Error in GetCustomerByID()", exp.Message, exp); } finally { if (dr != null) dr.Close(); if (con != null) con.Close(); } return (ds.Tables[0].Rows.Count 0) ? true : false; } public override bool Update() { return true; } public override bool Delete() { return true; } public override DataSet Select() { DataSet dst = new DataSet(); return dst; } private static SqlConnection GetConnection() { string connStr = WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; SqlConnection conn = new SqlConnection(connStr); return conn; }

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• Can't interact with children of an itemRenderer in Flex 4 Gumbo

  - by BlueDude

  I thought this would be pretty easy but I'm running into all sorts of problems with this. I have an ItemRenderer with a an image and two labels. I want to assign separate mouse events to the image and two labels. It seems like the item renderer is treated like a single interactive piece and I haven't found a way to override that. I couldn't even disable the default rollover effect so I had to style the rollOverColor to match my background. Can anyone provide a solution? <s:DataGroup id="browserDataGroup" dataProvider="{model.userBoardList}" verticalCenter="0" left="10" rollOverColor="0x424242" itemRenderer="edu.xxxxx.components.board.BrowserItemRenderer"> <!--itemrenderer code below --> <s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" xmlns:ns="library://ns.adobe.com/flex/mx" buttonMode="true" useHandCursor="true" mouseChildren="true"> <s:states> <s:State name="up"/> <s:State name="over"/> </s:states> <s:layout> <s:VerticalLayout gap="2"/> </s:layout> <s:Group> <ns:Image id="image" source="{data.thumbnail}" addedEffect="Fade" completeEffect="Fade" removedEffect="Fade" width="130" height="89" horizontalCenter="0" verticalCenter="0"/> <s:Rect id="imageRect" width="130" height="89"> <s:stroke> <s:SolidColorStroke color="0xFFFFFF" joints="miter" pixelHinting="true"/> </s:stroke> </s:Rect> </s:Group> <s:Label text="{data.title}" color="0xFFFFFF" fontWeight="bold"/> <s:Group> <s:layout> <s:HorizontalLayout gap="3"/> </s:layout> <s:Label text="Edit" color="0xFFFFFF" click="trace('edit');" textDecoration.up="underline" textDecoration.over="none"/> <s:Label text="|" color="0xFFFFFF"/> <s:Label text="Delete" color="0xFFFFFF" click="trace('delete');" textDecoration.up="underline" textDecoration.over="none"/> </s:Group> </s:ItemRenderer>

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• log4net not logging with a mixture of .net 1.1 and .net 3.5

  - by Jim P

  Hi All, I have an iis server on a windows 2003 production machine that will not log using log4net in the .net3.5 web application. Log4net works fine in the 1.1 apps using log4net version 1.2.9.0 and but not the 3.5 web app. The logging works fine in a development and staging environment but not in production. It does not error and I receive no events logged in the event viewer and don't know where to look next. I have tried both versions of log4net (1.2.9.0 and 1.2.10.0) and both work in development and staging but not in production. For testing purposes I have created just a single page application that just echos back the time when the page is hit and also is supposed to log to my logfile using log4net. Here is my web.config file: <configSections> <!-- LOG4NET Configuration --> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" requirePermission="false" /> </configSections> <log4net debug="true"> <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender"> <param name="File" value="D:\DIF\Logs\TestApp\TestApp_"/> <param name="AppendToFile" value="true"/> <param name="RollingStyle" value="Date"/> <param name="DatePattern" value="yyyyMMdd\.\l\o\g"/> <param name="StaticLogFileName" value="false"/> <layout type="log4net.Layout.PatternLayout"> <param name="ConversionPattern" value="%date{HH:mm:ss} %C::%M [%-5level] - %message%newline"/> </layout> </appender> <root> <level value="ALL"/> <appender-ref ref="RollingFileAppender"/> </root> </log4net> Here is my log4net initialization: // Logging for the application private static ILog mlog = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); protected void Application_Start(object sender, EventArgs e) { try { // Start the configuration of the Logging XmlConfigurator.Configure(); mlog.Info("Started logging for the TestApp Application."); } catch (Exception ex) { throw; } } Any help would be greatly appreciated. Thanks, Jim

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• How can we implement change notification propagation for WPF and SL in the MVVM pattern?

  - by Firoso

  Here's an example scenario targetting MVVM WPF/SL development: View data binds to view model Property "Target" "Target" exposes a field of an object called "data" that exists in the local application model, called "Original" when "Original" changes, it should raise notification to the view model and then propogate that change notification to the View. Here are the solutions I've come up with, but I don't like any of them all that much. I'm looking for other ideas, by the time we come up with something rock solid I'm certain Microsoft will have released .NET 5 with WPF/SL extensions for better tools for MVVM development. For now the question is, "What have you done to solve this problem and how has it worked out for you?" Option 1. Proposal: Attach a handler to data's PropertyChanged event that watches for string values of properties it cares about that might have changed, and raises the appropriate notification. Why I don't like it: Changes don't bubble naturally, objects must be explicitly watched, if data changes to a new source, events must be un-registered/registered. Why I kind of like it: I get explicit control over propogation of changes, and I don't have to use any types that belong at a higher level of the application such as dependancy properties. Option 2. Proposal: Attach a handler to data's PropertyChanged event that re-raises the event across all properties using the name property name. Why I don't like it: This is essentially the same as option 1, but less intelligent, and forces me to never change my property names, as they have to be the same as the property names on data Why I kind of like it: It's very easy to set up and I don't have to think about it... Then again if I try to think, and change names to things that make sense, I shoot myself in the foot, and then I have to think about it! Option 3. Proposal: Inherit my view model from dependancy object, and notify binding sources of changes directly. Why I don't like it: I'm not even 100% sure dependancy properties/objects can DO this, it was just a thought to look into. Also I don't personally feel that WPF/SL types like Dep Obj belong at the view model level. Why I kind of like it: IF it has the capability that I'm seeking then it's a good answer! minus that pesky layering issue. Option 4. Proposal: Use a consistant agent messaging system based off of Task Parallels DataFlow Library to propogate everything through linked pipelining. Why I don't like it: I've never tried this, and somehow I think it will be lacking, plus it requires me to think about my code completely differently all the way around. Why I kind of like it: It has the possiblity of allowing me to do some VERY fun manipulations with a push based data model and using ActionBlocks as validation AND setters to then privately change view model properties and explicitly control PropertyChanged notifications.

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• System.Web.HttpException on asp:gridview pagination

  - by Carlos Muñoz

  I have the following <asp:gridview> with one one TemplateField. En each cell there is an image with a link and a text with a link. It has AllowPaging=True This is the gridview: <asp:GridView ID="gvExperiencias" runat="server" AllowPaging="True" GridLines="None" ShowHeader="False" AutoGenerateColumns="False" Width="650px" PageSize="4" OnDataBinding="gvExperiencias_DataBinding" OnPageIndexChanging="gvExperiencias_PageIndexChanging"> <PagerSettings Mode="NumericFirstLast" FirstPageImageUrl="~/images/fle_pag_izq.gif" LastPageImageUrl="~/images/fle_pag_der.gif" NextPageImageUrl="~/images/fle_pag_der.gif" PreviousPageImageUrl="~/images/fle_pag_izq.gif" Position="TopAndBottom" PageButtonCount="4" FirstPageText="" LastPageText="" NextPageText="" PreviousPageText=""></PagerSettings> <Columns> <asp:TemplateField> <ItemTemplate> <div id="it_0" class="new_solo_exp_ini"> <asp:HyperLink ID="a_0" runat="server" NavigateUrl='<%# "experiencia.aspx?cod_cod=" + Eval("tttb_articulo_relacion_0.ARTCOD_ARTREL") + "&pag=" + pag + "&grp=" + Eval("idiocod_cod_idi_0") + "&cod="+cod %>' Visible='<%# Eval("NotEmpty_0") %>'> <asp:Image ID="Image_0" runat="server" Height="88px" ImageUrl='<%# Eval("arigls_nom_img_0","~/ArchivosUsuario/1/1/Articulos/{0}") %>' Width="88px" CssClass="new_image_exp_ini" /> </asp:HyperLink> <div class="new_vineta_tit_exp_ini"> <asp:HyperLink ID="HyperLink_0" runat="server" NavigateUrl='<%# "experiencia.aspx?cod_cod=" + Eval("tttb_articulo_relacion_0.ARTCOD_ARTREL") + "&pag=" + pag + "&grp=" + Eval("idiocod_cod_idi_0") + "&cod="+cod %>' Text='<%# Bind("arigls_tit_0") %>'> </asp:HyperLink> </div> </div> </ItemTemplate> </asp:TemplateField> </Columns> <PagerStyle CssClass="new_pag_bajo_exp_ini" /> <RowStyle CssClass="new_fila_exp_ini" /> </asp:GridView> When I click the last button or the ... it goes to the corresponding page but when i click on a previous page i get the following errror: An Error Has Occurred Because A Control With Id $ContentPlaceHolder1$gvExperiencias$ctl01$ctl01' Could Not Be Located Or A Different Control Is assigned to the same ID after postback. If the ID is not assigned, explicitly set the ID property of controls that raise postback events to avoid this error. So the pager does not work correctly. I think it's because of the Image's Id that has to be generated dinamically but i don't know how to do it. Can someone help me?

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• reset, Tweener, AS3

  - by VideoDnd

  How do I reset my numbers after they count? I want something like an onComplete function. DESCRIPTION My animation advances 120 pixels from it's current position, then flys off the stage. It was looping, and would yoyo to the bottom before advancing. I don't want my numbers yoyoing or flying off the stage. My numbers must move 120 pixels forward each count, then return. NumbersView.as 'the code works, but in a messed up way as described' package { import flash.display.DisplayObject; import flash.display.MovieClip; import flash.utils.Dictionary; import flash.events.Event; import caurina.transitions.Tweener; public class NumbersView extends MovieClip { private var _listItems:Array; private var previousNums:Array; private const numHeight:int = 120; public function NumbersView() { _listItems = new Array(); previousNums = new Array(); //Tweener.init(); var item:NumberImage; for (var i:Number = 0; i < 9; i++) { item = new NumberImage(); addChild(item); item.x = i * item.width; _listItems.push(item); } } public function setTime($number:String):void { var nums:Array = $number.split(""); //trace("$number = " + $number); for (var i:Number = 0; i < nums.length; i++) { if (nums[i] == previousNums[i]) continue; Tweener.removeTweens(_listItems[i]); //newY:int = -numHeight; var newY:int = int(nums[i]) * -numHeight; trace("newY = " + newY); trace("currY = " + _listItems[i].y); /*----------------------PROBLEM AREA, RIGHT HERE------------------------*/ //if (_listItems[i].y < 0) _listItems[i].y = numHeight;// //Tweener.addTween(_listItems[i], { y:newY, time:3 } );// Tweener.addTween(_listItems[i], { y:_listItems[i].y+newY, time:3 } );// } previousNums = nums; } } } Tweener Example http://hosted.zeh.com.br/tweener/docs/en-us/parameters/onComplete.html

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• Many-to-Many Relationship mapping does not trigger the EventListener OnPostInsert or OnPostDelete Ev

  - by san

  I'm doing my auditing using the Events listeners that nHibernate provides. It works fine for all mappings apart from HasmanyToMany mapping. My Mappings are as such: Table("Order"); Id(x => x.Id, "OrderId"); Map(x => x.Name, "OrderName").Length(150).Not.Nullable(); Map(x => x.Description, "OrderDescription").Length(800).Not.Nullable(); Map(x => x.CreatedOn).Not.Nullable(); Map(x => x.CreatedBy).Length(70).Not.Nullable(); Map(x => x.UpdatedOn).Not.Nullable(); Map(x => x.UpdatedBy).Length(70).Not.Nullable(); HasManyToMany(x => x.Products) .Table("OrderProduct") .ParentKeyColumn("OrderId") .ChildKeyColumn("ProductId") .Cascade.None() .Inverse() .AsSet(); Table("Product"); Id(x => x.Id, "ProductId"); Map(x => x.ProductName).Length(150).Not.Nullable(); Map(x => x.ProductnDescription).Length(800).Not.Nullable(); Map(x => x.Amount).Not.Nullable(); Map(x => x.CreatedOn).Not.Nullable(); ; Map(x => x.CreatedBy).Length(70).Not.Nullable(); Map(x => x.UpdatedOn).Not.Nullable(); Map(x => x.UpdatedBy).Length(70).Not.Nullable(); HasManyToMany(x => x.Orders) .Table("OrderProduct") .ParentKeyColumn("ProductId") .ChildKeyColumn("OrderId") .Cascade.None() .AsSet(); Whenever I do an update of an order (Eg: Changed the Orderdescription and deleted one of the products associated with it) It works fine as in it updated the order table and deletes the row in the orderproduct table. the event listener that I have associated with it captures the update of the order table but does NOT capture the associated delete event when the orderproduct is deleted. This behaviour is observed only in case of a ManyTomany mapped relationships. Since I would also like audit the packageproduct deletion, its kind of an annoyance when the event listener aren't able to capture the delete event. Any information about it would be greatly appreciated.

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• Modeling distribution of performance measurements

  - by peterchen

  How would you mathematically model the distribution of repeated real life performance measurements - "Real life" meaning you are not just looping over the code in question, but it is just a short snippet within a large application running in a typical user scenario? My experience shows that you usually have a peak around the average execution time that can be modeled adequately with a Gaussian distribution. In addition, there's a "long tail" containing outliers - often with a multiple of the average time. (The behavior is understandable considering the factors contributing to first execution penalty). My goal is to model aggregate values that reasonably reflect this, and can be calculated from aggregate values (like for the Gaussian, calculate mu and sigma from N, sum of values and sum of squares). In other terms, number of repetitions is unlimited, but memory and calculation requirements should be minimized. A normal Gaussian distribution can't model the long tail appropriately and will have the average biased strongly even by a very small percentage of outliers. I am looking for ideas, especially if this has been attempted/analysed before. I've checked various distributions models, and I think I could work out something, but my statistics is rusty and I might end up with an overblown solution. Oh, a complete shrink-wrapped solution would be fine, too ;) Other aspects / ideas: Sometimes you get "two humps" distributions, which would be acceptable in my scenario with a single mu/sigma covering both, but ideally would be identified separately. Extrapolating this, another approach would be a "floating probability density calculation" that uses only a limited buffer and adjusts automatically to the range (due to the long tail, bins may not be spaced evenly) - haven't found anything, but with some assumptions about the distribution it should be possible in principle. Why (since it was asked) - For a complex process we need to make guarantees such as "only 0.1% of runs exceed a limit of 3 seconds, and the average processing time is 2.8 seconds". The performance of an isolated piece of code can be very different from a normal run-time environment involving varying levels of disk and network access, background services, scheduled events that occur within a day, etc. This can be solved trivially by accumulating all data. However, to accumulate this data in production, the data produced needs to be limited. For analysis of isolated pieces of code, a gaussian deviation plus first run penalty is ok. That doesn't work anymore for the distributions found above. [edit] I've already got very good answers (and finally - maybe - some time to work on this). I'm starting a bounty to look for more input / ideas.

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• jquery and requirejs and knockout; reference requirejs object from within itself

  - by Thomas

  We use jquery and requirejs to create a 'viewmodel' like this: define('vm.inkoopfactuurAanleveren', ['jquery', 'underscore', 'ko', 'datacontext', 'router', 'messenger', 'config', 'store'], function ($, _, ko, datacontext, router, messenger, config, store) { var isBusy = false, isRefreshing = false, inkoopFactuur = { factuurNummer: ko.observable("AAA") }, activate = function (routeData, callback) { messenger.publish.viewModelActivated({ canleaveCallback: canLeave }); getNewInkoopFactuurAanleveren(callback); var restricteduploader = new qq.FineUploader({ element: $('#restricted-fine-uploader')[0], request: { endpoint: 'api/InkoopFactuurAanleveren', forceMultipart: true }, multiple: false, failedUploadTextDisplay: { mode: 'custom', maxChars: 250, responseProperty: 'error', enableTooltip: true }, text: { uploadButton: 'Click or Drop' }, showMessage: function (message) { $('#restricted-fine-uploader').append('<div class="alert alert-error">' + message + '</div>'); }, debug: true, callbacks: { onComplete: function (id, fileName, responseJSON) { var response = responseJSON; }, } }); }, invokeFunctionIfExists = function (callback) { if (_.isFunction(callback)) { callback(); } }, loaded = function (factuur) { inkoopFactuur = factuur; var ids = config.viewIds; ko.applyBindings(this, getView(ids.inkoopfactuurAanleveren)); /*<----- THIS = OUT OF SCOPE!*/ / }, bind = function () { }, saved = function (success) { var s = success; }, saveCmd = ko.asyncCommand({ execute: function (complete) { $.when(datacontext.saveNewInkoopFactuurAanleveren(inkoopFactuur)) .then(saved).always(complete); return; }, canExecute: function (isExecuting) { return true; } }), getView = function (viewName) { return $(viewName).get(0); }, getNewInkoopFactuurAanleveren = function (callback) { if (!isRefreshing) { isRefreshing = true; $.when(datacontext.getNewInkoopFactuurAanleveren(dataOptions(true))).then(loaded).always(invokeFunctionIfExists(callback)); isRefreshing = false; } }, dataOptions = function (force) { return { results: inkoopFactuur, // filter: sessionFilter, //sortFunction: sort.sessionSort, forceRefresh: force }; }, canLeave = function () { return true; }, forceRefreshCmd = ko.asyncCommand({ execute: function (complete) { //$.when(datacontext.sessions.getSessionsAndAttendance(dataOptions(true))) // .always(complete); complete; } }), init = function () { // activate(); // Bind jQuery delegated events //eventDelegates.sessionsListItem(gotoDetails); //eventDelegates.sessionsFavorite(saveFavorite); // Subscribe to specific changes of observables //addFilterSubscriptions(); }; init(); return { activate: activate, canLeave: canLeave, inkoopFactuur: inkoopFactuur, saveCmd: saveCmd, forceRefreshCmd: forceRefreshCmd, bind: bind, invokeFunctionIfExists: invokeFunctionIfExists }; }); On the line ko.applyBindings(this, getView(ids.inkoopfactuurAanleveren)); in the 'loaded' method the 'this' keyword doens't refer to the 'viewmodel' object. the 'self' keyword seems to refer to a combination on methods found over multiple 'viewmodels'. The saveCmd property is bound through knockout, but gives an error since it cannot be found. How can the ko.applyBindings get the right reference to the viewmodel? In other words, with what do we need to replace the 'this' keyword int he applyBindings. I would imagine you can 'ask' requirejs to give us the ealiers instantiated object with identifier 'vm.inkoopfactuurAanleveren' but I cannot figure out how.

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• Why does Celery work in Python shell, but not in my Django views? (import problem)

  - by TIMEX

  I installed Celery (latest stable version.) I have a directory called /home/myuser/fable/jobs. Inside this directory, I have a file called tasks.py: from celery.decorators import task from celery.task import Task class Submitter(Task): def run(self, post, **kwargs): return "Yes, it works!!!!!!" Inside this directory, I also have a file called celeryconfig.py: BROKER_HOST = "localhost" BROKER_PORT = 5672 BROKER_USER = "abc" BROKER_PASSWORD = "xyz" BROKER_VHOST = "fablemq" CELERY_RESULT_BACKEND = "amqp" CELERY_IMPORTS = ("tasks", ) In my /etc/profile, I have these set as my PYTHONPATH: PYTHONPATH=/home/myuser/fable:/home/myuser/fable/jobs So I run my Celery worker using the console ($ celeryd --loglevel=INFO), and I try it out. I open the Python console and import the tasks. Then, I run the Submitter. >>> import fable.jobs.tasks as tasks >>> s = tasks.Submitter() >>> s.delay("abc") <AsyncResult: d70d9732-fb07-4cca-82be-d7912124a987> Everything works, as you can see in my console [2011-01-09 17:30:05,766: INFO/MainProcess] Task tasks.Submitter[d70d9732-fb07-4cca-82be-d7912124a987] succeeded in 0.0398268699646s: But when I go into my Django's views.py and run the exact 3 lines of code as above, I get this: [2011-01-09 17:25:20,298: ERROR/MainProcess] Unknown task ignored: "Task of kind 'fable.jobs.tasks.Submitter' is not registered, please make sure it's imported.": {'retries': 0, 'task': 'fable.jobs.tasks.Submitter', 'args': ('abc',), 'expires': None, 'eta': None, 'kwargs': {}, 'id': 'eb5c65b4-f352-45c6-96f1-05d3a5329d53'} Traceback (most recent call last): File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/listener.py", line 321, in receive_message eventer=self.event_dispatcher) File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/job.py", line 299, in from_message eta=eta, expires=expires) File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/worker/job.py", line 243, in __init__ self.task = tasks[self.task_name] File "/home/myuser/mysite-env/lib/python2.6/site-packages/celery/registry.py", line 63, in __getitem__ raise self.NotRegistered(str(exc)) NotRegistered: "Task of kind 'fable.jobs.tasks.Submitter' is not registered, please make sure it's imported." It's weird, because the celeryd client does show that it's registered, when I launch it. [2011-01-09 17:38:27,446: WARNING/MainProcess] Configuration -> . broker -> amqp://GOGOme@localhost:5672/fablemq . queues -> . celery -> exchange:celery (direct) binding:celery . concurrency -> 1 . loader -> celery.loaders.default.Loader . logfile -> [stderr]@INFO . events -> OFF . beat -> OFF . tasks -> . tasks.Decayer . tasks.Submitter Can someone help?

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• Using QT to build a WYSIWYG Editor for a Custom Markup Language

  - by Aaron

  I'm new to QT, and am trying to figure out the best means of creating a WYSIWYG editor widget for a custom markup language that displays simple text, images, and links. I need to be able to propagate changes from the WYSIWYG editor to the custom markup representation. As a concrete example of the problem domain, imagine that the custom markup might have a "player" tag which contains a player name and a team name. The markup could look like this: Last week, <player id="1234"><name>Aaron Rodgers</name><team>Packers</team></player> threw a pass. This text would display in the editor as: Last week, Aaron Rodgers of the Packers threw a pass. The player name and the team name would be editable directly within the editor in standard WYSIWYG fashion, so that my users do not have to learn any markup. Also, when the player name is moused-over, a details pop-up will appear about that player, and similarly for the team. With that long introduction, I'm trying to figure out where to start with QT. It seems that the most logical option would be the Rich Text API using a QTextDocument. This approach seems less than ideal given the limitations of a QTextDocument: I can't figure out how to capture navigation events from clicking on links. Following links on click seems to only be enabled when the QTextEdit is readonly. Custom objects that implement QTextObjectInterface are ignored in copy-and-paste operations Any HTML-based markup that is passed to it as Rich Text is retranslated into a series of span tags and lots of other junk, making it extremely difficult to propagate changes from the editor back to the original custom markup. A second option appears to be QWebKit, which allows for live editing of HTML5 markup, so I could specify a two-way translation between the custom markup and HTML5. I'm not clear on how one would propagate changes from the editor back to the original markup in real-time without re-translating the entire document on every text change. The QWebKit solutions looks like awfully bulky to me (Learning WebKit along with QT) to what should be a relatively simple problem. I have also considered implementing the WYSIWYG with a custom class using native QT containers, labels, images, and other widgets manually. This seems like the most flexible approach, and the one most likely not to run into unresolvable problems. However, I'm pretty sure that implementing all the details of a normal text editor (selecting text, font changes, cut-and-paste support, undo/redo, dragging of objects, cursor placement, etc.) will be incredibly time consuming. So, finally, my question: are there any QT gurus out there with some advice on where to start with this sort of project? BTW, I am using QT because the application is a desktop application that needs platform independence.

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• How to get the clicked element in a dynamically built JQuery Treeview?

  - by Alexander

  I have a product database with several product categories. Each category has a number of sub-categories, which has sub-sub-categories, which has... Well, quite some levels deep. The tree is too huge to load at once, so I need to built it dynamically as users select specific product categories. Here's a snapshot of the product tree. Initially, only the first level is loaded. The second level (Cat. 1.1 and cat. 1.2) is added when the user clicks on cat. 1: <ul id="navigation"> <li id="625212">Product cat. 1 <ul> <li id="625213">Product cat. 1.1 <ul></ul> </li> <li id="625109">Product cat. 1.2 <ul></ul> </li> </ul> </li> <li id="624990">Product cat. 2 <ul></ul> </li> </ul> I intend to extend the tree as users click on specific product categories. I can get the list of sub-categories from a URL that takes the parent product category ID as input and outputs HTML in the format needed by treeview. I cannot use PHP and have to make this work with the .click() event. Here's the code that I have: $(document).ready(function(){ function doSomethingWithData(htmldata, id) { var branches = $(htmldata).appendTo("#navigation #"+id+" ul"); $("#navigation").treeview({ add: branches }); } $("#navigation").treeview({ collapsed: true, unique: true, persist: "location" }); $("#navigation li[id]").click(function() { var id=$(this).attr("id"); if ($("#"+$(this).attr("id")+" ul li").size()==0) { $.get('someurl?id='+$(this).attr("id"), function(data) { doSomethingWithData(data, id); } ) } }); }); The problem I'm having is with the click-event. When clicking on cat 1.1. to extend it one level deeper, it still returns the ID of the top level product category. How can I change the click events so that it will return the ID of the clicked <LI> instead of the top one? If the product category does not have any sub-categories, how can I remove the <UL></UL> and thus inidcating that the tree cannot be expanded any further?

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• Http Modules are called on every request when using mvc/routing module

  - by MartinF

  I am developing a http module that hooks into the FormsAuthentication Module through the Authenticate event. While debugging i noticed that the module (and all other modules registered) gets hit every single time the client requests a resource (also when it requests images, stylesheets, javascript files (etc.)). This happens both when running on a IIS 7 server in integrated pipeline mode, and debugging through the webdev server (in non- integrated pipeline mode) As i am developing a website with a lot images which usually wont be cached by the client browser it will hit the modules a lot of unnessecary times. I am using MVC and its routing mechanishm (System.Web.Routing.UrlRoutingModule). When creating a new website the runAllManagedModulesForAllRequests attribute for the IIS 7 (system.webServer) section is per default set to true in the web.config, which as the name indicates make it call all modules for every single request. If i set the runAllManagedModulesForAllRequests attribute to false, no modules will get called. It seems that the reason for this is because of the routing module or mvc (dont know excactly why), which causes that the asp.net (aspx) handler never gets called and therefore the events and the modules never gets called (one time only like supposed). I tested this by trying to call "mydomain.com/Default.aspx" instead of just "mydomain.com/" and correctly it calls the modules only once like it is supposed. How do i fix this so it only calls the modules once when the page is requested and not also when all other resources are requested ? Is there some way i can register that all requests should fire the asp.net (aspx) handler, except requests for specific filetype extensions ? Of course that wont fix the problem if i choose to go with urls like /content/images/myimage123 for the images (without the extension). But i cant think of any other way to fix it. Is there a better way to solve this problem ? I have tried to set up an ignoreRoute like this routes.IgnoreRoute("content/{*pathInfo}"); where the content folder contains all the images, javascripts and stylesheets in seperat subfolders, but it doesnt seem to change anything. I can see there a many different possibilites when setting up a handler but I cant seem to figure out how it should be possible to setup one that will make it possible to use the routing module and have urls like /blog/post123 and not call the modules when requesting images, javascripts and stylesheets (etc.). Hope anyone out there can help me ? Martin

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• Android GridView Custom BaseAdapter ImageView ImageButton OnItemClick doesn´t work

  - by Marek

  i have a problem using a GridView with a CustomAdapter (extends BaseAdapter). any Activity implements the OnItemClickListener. if i use ImageView as item everything works fine, OnItemClick-Events will be fired/catched I have not found a useful example for a GridView with a custom BaseAdapter using ImageButton. Has anyone an idea? Many thanks in advantage! Snippets: class MyActivity extends Activity implements OnItemClickListener { ... @Override public void onCreate() { ... GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setOnItemClickListener(this); gridview.setAdapter(new ImageButtonAdapter(this)); } ... @Override public void onItemClick(AdapterView<?> adapter, View view, int arg2, long arg3) { Log.e("onItemClick()", "arg2=" + arg2 + ", arg3=" + arg3); } } public class ImageButtonAdapter extends BaseAdapter { private Context mContext; public LayoutMenuAdapter(Context c) { mContext = c; } public int getCount() { return mThumbIds.length; } public Object getItem(int position) { return null; } public long getItemId(int position) { return 0; } public View getView(int position, View convertView, ViewGroup parent) { /* IF I USE THIS PART EVERYTHING WORKS FINE */ // ImageView imageView; // if (convertView == null) { // imageView = new ImageView(mContext); // imageView.setLayoutParams(new GridView.LayoutParams(100, 100)); // imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); // imageView.setPadding(0, 0, 0, 0); // imageView.setFocusable(false); // } else { // imageView = (ImageView) convertView; // } // imageView.setImageResource(mThumbIds[position]); // return imageView; /* IF I USE THIS PART NO THE ACTIVITY/LISTENER RECEIVES NO EVENT */ ImageButton imageButton; if (convertView == null) { imageButton = new ImageButton(mContext); imageButton.setLayoutParams(new GridView.LayoutParams(100, 100)); imageButton.setScaleType(ImageView.ScaleType.CENTER_CROP); imageButton.setPadding(0, 0, 0, 0); imageButton.setFocusable(false); } else { imageButton = (ImageButton) convertView; } imageButton.setImageResource(mThumbIds[position]); return imageButton; } // references to images private Integer[] mThumbIds = { R.drawable.media}; }

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• Is it possible to change HANDLE that has been opened for synchronous I/O to be opened for asynchrono

  - by Martin Dobšík

  Dear all, Most of my daily programming work in Windows is nowadays around I/O operations of all kind (pipes, consoles, files, sockets, ...). I am well aware of different methods of reading and writing from/to different kinds of handles (Synchronous, asynchronous waiting for completion on events, waiting on file HANDLEs, I/O completion ports, and alertable I/O). We use many of those. For some of our applications it would be very useful to have only one way to treat all handles. I mean, the program may not know, what kind of handle it has received and we would like to use, let's say, I/O completion ports for all. So first I would ask: Let's assume I have a handle: HANDLE h; which has been received by my process for I/O from somewhere. Is there any easy and reliable way to find out what flags it has been created with? The main flag in question is FILE_FLAG_OVERLAPPED. The only way known to me so far, is to try to register such handle into I/O completion port (using CreateIoCompletionPort()). If that succeeds the handle has been created with FILE_FLAG_OVERLAPPED. But then only I/O completion port must be used, as the handle can not be unregistered from it without closing the HANDLE h itself. Providing there is an easy a way to determine presence of FILE_FLAG_OVERLAPPED, there would come my second question: Is there any way how to add such flag to already existing handle? That would make a handle that has been originally open for synchronous operations to be open for asynchronous. Would there be a way how to create opposite (remove the FILE_FLAG_OVERLAPPED to create synchronous handle from asynchronous)? I have not found any direct way after reading through MSDN and googling a lot. Would there be at least some trick that could do the same? Like re-creating the handle in same way using CreateFile() function or something similar? Something even partly documented or not documented at all? The main place where I would need this, is to determine the the way (or change the way) process should read/write from handles sent to it by third party applications. We can not control how third party products create their handles. Dear Windows gurus: help please! With regards Martin

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• Tomcat JNDI Connection Pool docs - Random Connection Closed Exceptions

  - by Andy Faibishenko

  I found this in the Tomcat documentation here What I don't understand is why they close all the JDBC objects twice - once in the try{} block and once in the finally{} block. Why not just close them once in the finally{} clause? This is the relevant docs: Random Connection Closed Exceptions These can occur when one request gets a db connection from the connection pool and closes it twice. When using a connection pool, closing the connection just returns it to the pool for reuse by another request, it doesn't close the connection. And Tomcat uses multiple threads to handle concurrent requests. Here is an example of the sequence of events which could cause this error in Tomcat: Request 1 running in Thread 1 gets a db connection. Request 1 closes the db connection. The JVM switches the running thread to Thread 2 Request 2 running in Thread 2 gets a db connection (the same db connection just closed by Request 1). The JVM switches the running thread back to Thread 1 Request 1 closes the db connection a second time in a finally block. The JVM switches the running thread back to Thread 2 Request 2 Thread 2 tries to use the db connection but fails because Request 1 closed it. Here is an example of properly written code to use a db connection obtained from a connection pool: Connection conn = null; Statement stmt = null; // Or PreparedStatement if needed ResultSet rs = null; try { conn = ... get connection from connection pool ... stmt = conn.createStatement("select ..."); rs = stmt.executeQuery(); ... iterate through the result set ... rs.close(); rs = null; stmt.close(); stmt = null; conn.close(); // Return to connection pool conn = null; // Make sure we don't close it twice } catch (SQLException e) { ... deal with errors ... } finally { // Always make sure result sets and statements are closed, // and the connection is returned to the pool if (rs != null) { try { rs.close(); } catch (SQLException e) { ; } rs = null; } if (stmt != null) { try { stmt.close(); } catch (SQLException e) { ; } stmt = null; } if (conn != null) { try { conn.close(); } catch (SQLException e) { ; } conn = null; } }

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