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  • No matter what, I can't get this stupid progress bar to update from a thread!

    - by Synthetix
    I have a Windows app written in C (using gcc/MinGW) that works pretty well except for a few UI problems. One, I simply cannot get the progress bar to update from a thread. In fact, I probably can't get ANY UI stuff to update. Basically, I have a spawned thread that does some processing, and from that thread I attempt to update the progress bar in the main thread. I tried this by using PostMessage() to the main hwnd, but no luck even though I can do other things like open message boxes. However, it's unclear whether the message box is getting called within the thread or on the main thread. Here's some code: //in header/globally accessible HWND wnd; //main application window HWND progress_bar; //progress bar typedef struct { //to pass to thread DWORD mainThreadId; HWND mainHwnd; char *filename; } THREADSTUFF; //callback function LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){ switch(msg){ case WM_CREATE:{ //create progress bar progress_bar = CreateWindowEx( 0, PROGRESS_CLASS, (LPCTSTR)NULL, WS_CHILD | WS_VISIBLE, 79,164,455,15, hwnd, (HMENU)20, NULL, NULL); break; } case WM_COMMAND:{ if(LOWORD(wParam)==2){ //do some processing in a thread //struct of stuff I need to pass to thread THREADSTUFF *threadStuff; threadStuff = (THREADSTUFF*)malloc(sizeof(*threadStuff)); threadStuff->mainThreadId = GetCurrentThreadId(); threadStuff->mainHwnd = hwnd; threadStuff->filename = (void*)&filename; hThread1 = CreateThread(NULL,0,convertFile (LPVOID)threadStuff,0,NULL); }else if(LOWORD(wParam)==5){ //update progress bar MessageBox(hwnd,"I got a message!", "Message", MB_OK | MB_ICONINFORMATION); PostMessage(progress_bar,PBM_STEPIT,0,CLR_DEFAULT); } break; } } } This all seems to work okay. The problem is in the thread: DWORD WINAPI convertFile(LPVOID params){ //get passed params, this works perfectly fine THREADSTUFF *tData = (THREADSTUFF*)params; MessageBox(tData->mainHwnd,tData->filename,"File name",MB_OK | MB_ICONINFORMATION); //yep PostThreadMessage(tData->mainThreadId,WM_COMMAND,5,0); //only shows message PostMessage(tData->mainHwnd,WM_COMMAND,5,0); //only shows message } When I say, "only shows message," that means the MessageBox() function in the callback works, but not the PostMessage() to update the position of the progress bar. What am I missing?

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  • Are two periods allowed in the local-part of an email address?

    - by Mike B
    A third-party email gateway relay is refusing to process a message for an email address we're sending to. The address is in the format of [email protected] (note the two periods). Is this allowed by RFC guidelines? RFC 2822 seems to object to this in section 3.4.1: The locally interpreted string is either a quoted-string or a dot-atom. If the string can be represented as a dot-atom (that is, it contains no characters other than atext characters or "." surrounded by atext characters), then the dot-atom form SHOULD be used and the quoted-string form SHOULD NOT be used. Comments and folding white space SHOULD NOT be used around the "@" in the addr-spec. Furthermore, in that same section, it references this: addr-spec = local-part "@" domain local-part = dot-atom / quoted-string / obs-local-part I interpret this to mean that the localpart can have content separated by dots but there cannot be two successive dots, and it cannot start or end with a dot. That being said, I'm not familiar with dot-atom syntax so maybe I'm mistaken here. Can someone please confirm and explain?

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  • C# How to execute an application from windows service

    - by Jhone
    I have window XP 2003 server, which is placed in a room where no one can enter to logon it. for monitoring some applications I created a consol application myServer.exe, which dont have any UI, I want that this application (e.g., myServer.exe) start automatically as window bootup (e.g., before window logon) and I need to do this work using windows service. need your help. (note: please dont suggest me any other solution, I need to use windows service to accompalish this task)

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  • How do I use a DataGrid to display the contents of a MDB

    - by orangecl4now
    I'm relatively new to .Net 4 and I am creating my FIRST WPF application using a MDB as a backend datasource. I designed my UI. I have a TextField (called Name), a Combobox (called Division) and a DataGrid (called dataGrid1). The only problem I'm having is figuring out how to link my DataGrid to display data from the DataSource. and load the data in the Windows1_Loaded method. Thanks

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  • Showing pagination with only single page using will_paginate

    - by James
    I'm using will_paginate as standard, but it only shows the pagination controls (< 1 2 etc) when there's more than one page to display. Normally, this would be what is wanted, but I want to see the pagination controls (for UI consistency and to get round an annoying CSS quirk in the system I'm working on) even when there's only 1 page to display (showing < 1 ). Is this possible?

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  • webprogramming -what is the learning pathway ?

    - by Bunny Rabbit
    i have some knowledge of css,jQuery,Grails,django,servlets and jsp still i can't see me designing good professional looking websites .what am lacking ? should i start learning jQUery ui ,should i get into adobe products like flash i am pretty confused. i am pretty bad in the userinterface part,

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  • How to pass non-fatal warnings from a library

    - by wRAR
    A library function parses a file and returns an object. If a parser encounters unknown data, missing values etc., it shouldn't throw an exception and stop parsing (because this is not fatal), but there should be a way to pass information about these things to a caller (so that warnings can be displayed in the UI, for example). How can these warning be returned? I'm thinking of passing a callback function/object into the library, are there any other possible solutions?

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  • How to access the map returned by IParameterValues::getParameterValues()?

    - by Hua
    I declared a command and a commandParameter for this command. I specified the "values" of this commandParameter as a class implemented by myself. The implementation of this class is below, public class ParameterValues implements IParameterValues { @Override public Map<String, Double> getParameterValues() { // TODO Auto-generated method stub Map<String, Double> values = new HashMap<String, Double>(2); values.put("testParam", 1.1239); values.put("AnotherTest", 4.1239); return values; } } The implementation of the handler of this command is blow, public class testHandler extends AbstractHandler implements IHandler { private static String PARAMETER_ID = "my.parameter1"; @Override public Object execute(ExecutionEvent event) throws ExecutionException { String value = event.getParameter(PARAMETER_ID); MessageDialog.openInformation(HandlerUtil.getActiveShell(event), "Test", "Parameter ID: " + PARAMETER_ID + "\nValue: " + value); return null; } } Now, I contribute the command to a menu, <menuContribution locationURI="menu:org.eclipse.ui.main.menu"> <menu id="my.edit" label="Edit"> <command commandId="myCommand.test" label="Test1"> <parameter name="my.parameter1" value="testParam"> </parameter> </command> Since I specified a "values" class for the commandParater, I expect when the menu is clicked, this code line "String value = event.getParameter(PARAMETER_ID);" in the handler class returns 1.1239 instead of "testParam". But, I still see that code line returns "testParam". What's the problem? How could I access the map returned by getParameterValues()? By the way, following menu declaration still works even I don't define "ppp" in the map. <menuContribution locationURI="menu:org.eclipse.ui.main.menu"> <menu id="my.edit" label="Edit"> <command commandId="myCommand.test" label="Test1"> <parameter name="my.parameter1" value="ppp"> </parameter> </command> Thanks!

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  • Why my images are compressed?

    - by Johnny
    I'm using layout xml file for the UI. But the images are compressed and the qualities have lost in some level. My code is like this: <ImageView android:layout_width="480px" android:layout_height="717px" android:layout_x="0px" android:layout_y="45px" android:scaleType="fitXY" android:src="@drawable/e4" /> The drawable is actually 480x717. What's the problem here? Is it due to the fitXY?

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  • Changing farm account in Sharepoint 2010

    - by user55709
    After changing the the farm account to a domain user account I get the following error when trying to access the Central Administration page: "Cannot connect to configuration database" After I realized the headache may not be worth it, I decided to a reinstall using the following SP user account guidelines: http://technet.microsoft.com/en-us/library/ee662513.aspx After getting everything up, I am getting an error when using the designated farm account under the Central Admin Website Manage Service Accounts: "Access denied" If it is the farm administrator, why would I not be able to manage service accounts? I am able to access the other part of the admin site. Also, when logging in with the farm account it lists me as a "system account" not the domain account which I used for log in. Am I missing something or is this normal behavior? Am I not suppose to login with the farm account? When I log in with the Setup account (also a domain account) I can access everything with no errors on the site. The only difference between the two accounts is one has local admin privileges on the Sharepoint farm server which is the setup account. if you notice those privileges are not necessary for the farm account according to the article cited.

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  • Using java abstract class

    - by user969131
    In my UI project, I have few screens that share the same header style only the text is specific to the screens. What will be a good way to implement this? Have the super class create all the header component and open the components to the sub class, the sub class will access to component's setText method to update the text? or Have abstract method in super class to create the components, sub class will implement these methods to create the component. Hope it make sense..

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  • I can't see any trace output in ASP.NET

    - by asksuperuser
    In Visual Studio 2010 I added Trace to Page_Load as explained here http://www.asp101.com/articles/robert/tracing/default.asp but I can't see any Trace output, why ? public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Trace.IsEnabled = true; Trace.Write("Hello World"); } }

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  • Crossthread exception and invokerequired solution doesn't change my control value

    - by Pilouk
    EDIT Solution : Here i'm setting my byref value in each object then i'm running a backgroundworker Private Sub TelechargeFichier() Dim DocManquant As Boolean = False Dim docName As String = "" Dim lg As String = "" Dim telechargementFini As Boolean = False lblMessage.Text = EasyDealChangeLanguage.Instance.GetStringFromResourceName("1478") prgBar.Maximum = m_listeFichiers.Count For i As Integer = 0 To m_listeFichiers.Count - 1 m_listeFichiers(i).Set_ByRefLabel(lblMessage) m_listeFichiers(i).Set_ByRefPrgbar(prgBar) m_listeThreads.Add(New Thread(AddressOf m_listeFichiers(i).DownloadMe)) Next m_bgWorker = New BackgroundWorker m_bgWorker.WorkerReportsProgress = True AddHandler m_bgWorker.DoWork, AddressOf DownloadFiles m_bgWorker.RunWorkerAsync() ''Completed 'lblMessage.Text = EasyDealChangeLanguage.Instance.GetStringFromResourceName("1383") 'Me.DialogResult = System.Windows.Forms.DialogResult.OK End Sub Here is my downloadFiles function : Note that each start will do the downloadMe function see below too Private Sub DownloadFiles(sender As Object, e As DoWorkEventArgs) For i As Integer = 0 To m_listeThreads.Count - 1 m_listeThreads(i).Start() Next For i As Integer = 0 To m_listeThreads.Count - 1 m_listeThreads(i).Join() Next End Sub I have multiple thread that each will download a ftp file. I would like that each file that have been completed will set a value to a progress bar and a label from my UI thread. For some reason invokerequired never change to false. Here is my little function that start all the thread Private Sub TelechargeFichier() Dim DocManquant As Boolean = False Dim docName As String = "" Dim lg As String = "" Dim telechargementFini As Boolean = False lblMessage.Text = EasyDealChangeLanguage.Instance.GetStringFromResourceName("1478") prgBar.Maximum = m_listeFichiers.Count For i As Integer = 0 To m_listeFichiers.Count - 1 m_listeFichiers(i).Set_ByRefLabel(lblMessage) m_listeFichiers(i).Set_ByRefPrgbar(prgBar) m_listeThreads.Add(New Thread(AddressOf m_listeFichiers(i).DownloadMe)) Next For i As Integer = 0 To m_listeThreads.Count - 1 m_listeThreads(i).Start() Next For i As Integer = 0 To m_listeThreads.Count - 1 m_listeThreads(i).Join() Next 'Completed lblMessage.Text = EasyDealChangeLanguage.Instance.GetStringFromResourceName("1383") Me.DialogResult = System.Windows.Forms.DialogResult.OK End Sub Here my property that hold the Byref control from the UI thread. This is in my object which content the addressof function that will download the file (DownloadMe) Public Sub Set_ByRefPrgbar(ByRef prgbar As ProgressBar) m_prgBar = prgbar End Sub Public Sub Set_ByRefLabel(ByRef lbl As EasyDeal.Controls.EasyDealLabel3D) m_lblMessage = lbl End Sub Here is the download function : Public Sub DownloadMe() Dim ftpReq As FtpWebRequest Dim ftpResp As FtpWebResponse = Nothing Dim streamInput As Stream Dim fileStreamOutput As FileStream Try ftpReq = CType(WebRequest.Create(EasyDeal.Controls.Common.FTP_CONNECTION & m_downloadFtpPath & m_filename), FtpWebRequest) ftpReq.Credentials = New NetworkCredential(FTP_USER, FTP_PASS) ftpReq.Method = WebRequestMethods.Ftp.DownloadFile ftpResp = ftpReq.GetResponse streamInput = ftpResp.GetResponseStream() fileStreamOutput = New FileStream(m_outputPath, FileMode.Create, FileAccess.ReadWrite) ReadWriteStream(streamInput, fileStreamOutput) Catch ex As Exception 'Au pire la fichier sera pas downloader Finally If ftpResp IsNot Nothing Then ftpResp.Close() End If Dim nomFichier As String = m_displaynameEN If EasyDealChangeLanguage.GetCurrentLanguageTypes = EasyDealChangeLanguage.EnumLanguageType.Francais Then nomFichier = m_displaynameFR End If If m_lblMessage IsNot Nothing Then EasyDealCommon.TH_SetControlText(m_lblMessage, String.Format(EasyDealChangeLanguage.Instance.GetStringFromResourceName("1479"), nomFichier)) End If If m_prgBar IsNot Nothing Then EasyDealCommon.TH_SetPrgValue(m_prgBar, 1) End If End Try End Sub Here is the crossthread invoke solution function : Public Sub TH_SetControlText(ByVal ctl As Control, ByVal text As String) If ctl.InvokeRequired Then ctl.BeginInvoke(New Action(Of Control, String)(AddressOf TH_SetControlText), ctl, text) Else ctl.Text = text End If End Sub Public Sub TH_SetPrgValue(ByVal prg As ProgressBar, ByVal value As Integer) If prg.InvokeRequired Then prg.BeginInvoke(New Action(Of ProgressBar, Integer)(AddressOf TH_SetPrgValue), prg, value) Else prg.Value += value End If End Sub The problem is the invokerequired never get to false it actually goes in to beginInvoke but never end in the Else section to set the value.

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  • jQuery: How can I work with dates in this format? mm/yyyy

    - by Enrique
    I'm doing a web application for articles Articles must be shown by month, with its published date stored as mm/yyyy Now: 1- Should I use a DATE type field for storing? 2- Will jQuery UI datePicker be useful for showing mm/yyyy? 3- How could I sort by mm/yyyy? I guess it will be more complicated if I store date normally and extract the day from date each time I want to do something, right? Thanks,

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