BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TMemo and streams          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message chris Guest Posted: Tue Dec 23, 2003 12:13 pm    Post subject: TMemo and streams Hi all, I am on a big problem I can not solve from hours. I am now wondering if what i want to do is posible.... Well, here is my problem: I want to link a TMemo with a std::ostream. What does it mean you will say? It means that every change on the stream must appear on the TMemo. See the following example: 1/put a memo on a form 2/put a button on the form 3/declare a private std::ostream variable in your main form and initialize it in ctor: #include <iostream> [....] private: std::ostream* os; #include <fstream> [...] void __fastcall TForm1::TForm1(TObject* AOwner): TForm(AOwner) { os = new std::ofstream("test.txt"); } 4/define the OnClick button method to: void __fastcall Button1OnClick(TObject* Sender) { os << "button1 were clicked" << std::endl; } what I want to do is print "button1 were click" into the TMemo without adding a line like Memo1->Lines->Add("button1 were clicked") under os << line. So my questions are: Is it possible? If no why? If yes, how? If you wonder why I want to do so here is the answer: I have a library that write logs via std::ostream and I want these logs appeared in my memo. Of course, I do not have the source code to modify the way the library logs (if i have them, I would simply add the Memo1->Lines->Add to the code). thanks for your help -- chris Back to top Rodolfo Frino - Macrosoft Guest Posted: Tue Dec 23, 2003 1:30 pm    Post subject: Re: TMemo and streams Do you have a log file with the logs> if so, can you load that log file, or the desired part of it, into your Memo? Rodolfo "chris" <blin_c (AT) epita (DOT) fr> wrote Quote: Hi all, I am on a big problem I can not solve from hours. I am now wondering if what i want to do is posible.... Back to top Hans Galema Guest Posted: Tue Dec 23, 2003 1:37 pm    Post subject: Re: TMemo and streams chris wrote: Quote: void __fastcall TForm1::TForm1(TObject* AOwner): TForm(AOwner) { os = new std::ofstream("test.txt"); what I want to do is print "button1 were click" into the TMemo without adding a line like Memo1->Lines->Add("button1 were clicked") under os line. So my questions are: Is it possible? Don't know yet. But I do nots ee a connection with your library. Quote: If you wonder why I want to do so here is the answer: I have a library that write logs via std::ostream and I want these logs appeared in my memo. But... is the library writing a std::ostream that you declared first and then handed ove to that library ? In other words: is the ostream used by the library accessible ? Hans. Back to top chris Guest Posted: Tue Dec 23, 2003 2:27 pm    Post subject: Re: TMemo and streams "Rodolfo Frino - Macrosoft" <Macrosoft (AT) Atlantis (DOT) com> a écrit dans le message de news: [email]3fe8436e (AT) newsgroups (DOT) borland.com[/email]... Quote: Do you have a log file with the logs> if so, can you load that log file, or the desired part of it, into your Memo? yes I have but it will be a pain to periodically reload the memo contents from the file... I really need the link between std::osteram and a TMemo. This is a network application with big amount of log. What I want to do is directly display the logs in my memo. After I will have manage that, I will do syntax highliting which will be another problem. -- chris Back to top chris Guest Posted: Tue Dec 23, 2003 2:31 pm    Post subject: Re: TMemo and streams "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> a écrit dans le message de news: [email]3fe84429 (AT) newsgroups (DOT) borland.com[/email]... Quote: chris wrote: void __fastcall TForm1::TForm1(TObject* AOwner): TForm(AOwner) { os = new std::ofstream("test.txt"); what I want to do is print "button1 were click" into the TMemo without adding a line like Memo1->Lines->Add("button1 were clicked") under os line. So my questions are: Is it possible? Don't know yet. But I do nots ee a connection with your library. My library writes logs in a std::ostream and I want to display them in a TMemo instead of (or in the same time that) in the file. Quote: If you wonder why I want to do so here is the answer: I have a library that write logs via std::ostream and I want these logs appeared in my memo. But... is the library writing a std::ostream that you declared first and then handed ove to that library ? In other words: is the ostream used by the library accessible ? That is the second solution: I am doing something like: std::ostream* os = new std::ofstream("test.log"); MyLib* lib = new MyLib(*os); //proto is: MyLib(std::osteram&); So yes the stream is accessible and its type is std::ostream. thanks for your attention -- chris Back to top Timothy H. Buchman Guest Posted: Tue Dec 23, 2003 3:34 pm    Post subject: Re: TMemo and streams "chris" <blin_c> wrote Quote: I really need the link between std::osteram and a TMemo. You've said that you don't have the library source code. So in what way is the ostream accessible to you? Even if you have access to the stream variable ("os" in your example), I can't see any way to access data that were streamed out at an earlier time-unless the stream can be read as well, in which case you could check whether the seek pointer has changed... Quote: After I will have manage that, I will do syntax highliting which will be another problem. You can't do highlighting (other than capitalization) in a TMemo, so you will probably have to switch to TRichEdit or one of the third-party components derived from it around. You might as well start with the same component you'll finish with. -- Timothy H. Buchman ======================================== City Center Theater, New York NY mail address tbuchmanPLEASE(at sign)REMOVEcitycenterD O Torg Search .borland message archive on http://www.tamaracka.com/search.htm Back to top chris Guest Posted: Wed Dec 24, 2003 8:26 am    Post subject: Re: TMemo and streams "Timothy H. Buchman" <tbuchmanREMOVE(at)PLEASEcitycenter D O To r g> a écrit dans le message de news: 3fe861a9$1 (AT) newsgroups (DOT) borland.com... Quote: "chris" <blin_c> wrote in message news:3fe84ff6$1 (AT) newsgroups (DOT) borland.com... I really need the link between std::osteram and a TMemo. You've said that you don't have the library source code. So in what way is the ostream accessible to you? Even if you have access to the stream variable ("os" in your example), I can't see any way to access data that were streamed out at an earlier time-unless the stream can be read as well, in which case you could check whether the seek pointer has changed... The other post I did to Hans demonstrate how I access the std::ostream. Quote: After I will have manage that, I will do syntax highliting which will be another problem. You can't do highlighting (other than capitalization) in a TMemo, so you will probably have to switch to TRichEdit or one of the third-party components derived from it around. You might as well start with the same component you'll finish with. As I said, it will be another problem. For the moment, I concentrate myself on the log display (TMemo or TRichEdit, it does not matter). -- chris Back to top chris Guest Posted: Wed Dec 24, 2003 10:09 am    Post subject: Re: TMemo and streams I manage to solve the pb. The library modelisation provided a hack. -- chris Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.