BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TListImage and TBitmap          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message --== Alain ==-- Guest Posted: Mon Sep 25, 2006 5:56 pm    Post subject: TListImage and TBitmap Hi, I would like to know how can i do. I have a bitmap image stored in my TBitmap *Bmp; This bitmap is 24x8 and represents 3 small bitmaps. Now i would like to slice it in 3 parts 8x8, so for that i was thinking to store it into TImageList *ImgLst; and slice it by giving height and width = 8. but it does not work. when i do it, i have the following error : violation error in vcl100.bpl so here is my code : __fastcall TARListView::TARListView(TComponent* Owner) : TListView(Owner) { LastSortedColumn=0; // none LastSortedDirection=0; // A-Z (from A to Z) Graphics::TBitmap *Bmp = new Graphics::TBitmap(); Bmp->LoadFromResourceName((reinterpret_cast<int>(HInstance)),"ARROW"); ImgLst->AddMasked(Bmp,TColor(0x000000FF)); ImgLst->Width = 8; ImgLst->Height = 8; delete Bmp; } where ImgLst is TImageList* thanks for help, ALain Back to top Remy Lebeau (TeamB) Guest Posted: Mon Sep 25, 2006 10:52 pm    Post subject: Re: TListImage and TBitmap "--== Alain ==--" <nospam (AT) noemail (DOT) com> wrote in message news:4517d1db (AT) newsgroups (DOT) borland.com... Quote: but it does not work. when i do it, i have the following error : violation error in vcl100.bpl Where exactly does it occur? On which line? Quote: Graphics::TBitmap *Bmp = new Graphics::TBitmap(); Bmp->LoadFromResourceName((reinterpret_cast<int>(HInstance)),"ARROW"); If you put the component into a package, and then put the image into the same package, then that code will fail, as the HInstance will point to the wrong module. You should use FindClassHInstance() instead: Bmp->LoadFromResourceName(FindClassHInstance(__classid(TARListView)) ,"ARROW"); Quote: ImgLst->AddMasked(Bmp,TColor(0x000000FF)); Where are you actually instantiating the TImageList object? If it is a member of the TARListView class, then you are not instantiating it at all, and thus are trying to access an invalid object. That would explain the crash, if the above is the line that is crashing to begin with. Quote: ImgLst->Width = 8; ImgLst->Height = 8; You should be setting those values before loading the image, not afterwards. Gambit Back to top --== Alain ==-- Guest Posted: Tue Sep 26, 2006 12:25 am    Post subject: Re: TListImage and TBitmap The TImageList object is instanciated in constructor of my component, via new. like that : ImgLst = new TImageList(this); Alain Remy Lebeau (TeamB) wrote: Quote: "--== Alain ==--" <nospam (AT) noemail (DOT) com> wrote in message news:4517d1db (AT) newsgroups (DOT) borland.com... but it does not work. when i do it, i have the following error : violation error in vcl100.bpl Where exactly does it occur? On which line? Graphics::TBitmap *Bmp = new Graphics::TBitmap(); Bmp->LoadFromResourceName((reinterpret_cast<int>(HInstance)),"ARROW"); If you put the component into a package, and then put the image into the same package, then that code will fail, as the HInstance will point to the wrong module. You should use FindClassHInstance() instead: Bmp->LoadFromResourceName(FindClassHInstance(__classid(TARListView)) ,"ARROW"); ImgLst->AddMasked(Bmp,TColor(0x000000FF)); Where are you actually instantiating the TImageList object? If it is a member of the TARListView class, then you are not instantiating it at all, and thus are trying to access an invalid object. That would explain the crash, if the above is the line that is crashing to begin with. ImgLst->Width = 8; ImgLst->Height = 8; You should be setting those values before loading the image, not afterwards. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Tue Sep 26, 2006 1:47 am    Post subject: Re: TListImage and TBitmap "--== Alain ==--" <nospam (AT) noemail (DOT) com> wrote in message news:45182d29$1 (AT) newsgroups (DOT) borland.com... Quote: The TImageList object is instanciated in constructor of my component, via new. like that : ImgLst = new TImageList(this); You did not show that in your earlier code. Your constructor should look like the following: __fastcall TARListView::TARListView(TComponent* Owner) : TListView(Owner) { LastSortedColumn = 0; // none LastSortedDirection = 0; // A-Z (from A to Z) ImgLst = new TImageList(this); // <-- here ImgLst->Width = 8; ImgLst->Height = 8; Graphics::TBitmap *Bmp = new Graphics::TBitmap; try { Bmp->LoadFromResourceName(FindClassHInstance(__classid(TARListView)) ,"ARROW"); ImgLst->AddMasked(Bmp, clRed); } __finally { delete Bmp; } } For future reference, please ALWAYS show all relevent code when you post snippets. Gambit Back to top --== Alain ==-- Guest Posted: Tue Sep 26, 2006 8:11 am    Post subject: Re: TListImage and TBitmap Sorry if i deleted it. I had in my code several commented lines, so i removed them when i did the copy and paste to newsgroups. for sure i did not use the try and finally command...only when my code is working i had security such like that. Al. Remy Lebeau (TeamB) wrote: Quote: "--== Alain ==--" <nospam (AT) noemail (DOT) com> wrote in message news:45182d29$1 (AT) newsgroups (DOT) borland.com... The TImageList object is instanciated in constructor of my component, via new. like that : ImgLst = new TImageList(this); You did not show that in your earlier code. Your constructor should look like the following: __fastcall TARListView::TARListView(TComponent* Owner) : TListView(Owner) { LastSortedColumn = 0; // none LastSortedDirection = 0; // A-Z (from A to Z) ImgLst = new TImageList(this); // <-- here ImgLst->Width = 8; ImgLst->Height = 8; Graphics::TBitmap *Bmp = new Graphics::TBitmap; try { Bmp->LoadFromResourceName(FindClassHInstance(__classid(TARListView)) ,"ARROW"); ImgLst->AddMasked(Bmp, clRed); } __finally { delete Bmp; } } For future reference, please ALWAYS show all relevent code when you post snippets. Gambit 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.