BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Drawing bitmap image on the form          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message Andy Guest Posted: Fri Oct 13, 2006 1:29 pm    Post subject: Drawing bitmap image on the form I am trying to create an application that is similar to Windows Media Center where I use a Resizer component to resize all controls when the screen resolution is changed. Fonts are easy but I cannot use any of the standard controls like combobox or even TImage. I was thinking of creating and drawing the bitmap images on the form using the GDI and maybe I can get it to resize accordingly. Anyone who has experience on how to do this is greatly appreciated. Thanking you in advance. Andy Back to top Peter Below (TeamB) Guest Posted: Fri Oct 13, 2006 11:11 pm    Post subject: Re: Drawing bitmap image on the form Andy wrote: Quote: I am trying to create an application that is similar to Windows Media Center where I use a Resizer component to resize all controls when the screen resolution is changed. Fonts are easy but I cannot use any of the standard controls like combobox or even TImage. I was thinking of creating and drawing the bitmap images on the form using the GDI and maybe I can get it to resize accordingly. Anyone who has experience on how to do this is greatly appreciated. You can paint on the forms Canvas in the forms OnPaint event, or you can use a TPaintbox and draw on its canvas in its OnPaint event. -- Peter Below (TeamB) Don't be a vampire (http://slash7.com/pages/vampires), use the newsgroup archives : http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Andy Guest Posted: Sat Oct 14, 2006 3:41 am    Post subject: Re: Drawing bitmap image on the form Hi Peter, Thanks for the tip. How do I scale and resize an image drawn this way when the form resolution resizes, such as when using a Resizer component? Thanks again. Andy "Peter Below (TeamB)" <none> wrote in message news:xn0esfhca1l09q002 (AT) newsgroups (DOT) borland.com... Quote: Andy wrote: I am trying to create an application that is similar to Windows Media Center where I use a Resizer component to resize all controls when the screen resolution is changed. Fonts are easy but I cannot use any of the standard controls like combobox or even TImage. I was thinking of creating and drawing the bitmap images on the form using the GDI and maybe I can get it to resize accordingly. Anyone who has experience on how to do this is greatly appreciated. You can paint on the forms Canvas in the forms OnPaint event, or you can use a TPaintbox and draw on its canvas in its OnPaint event. -- Peter Below (TeamB) Don't be a vampire (http://slash7.com/pages/vampires), use the newsgroup archives : http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Peter Below (TeamB) Guest Posted: Sat Oct 14, 2006 6:17 pm    Post subject: Re: Drawing bitmap image on the form Andy wrote: Quote: Thanks for the tip. How do I scale and resize an image drawn this way when the form resolution resizes, such as when using a Resizer component? Scaling a bitmap is not an easy task. You can use the TCanvas.StretchDraw method, but the algorithm Windows uses for the task does not always yield a good image quality. The graphics32 library mentioned in another reply in this thread offers alternative methods that work better. Never used it myself but is mentioned favourably quite often in this group. What you should always try, however, is to maintain the aspect ratio of your original image. If that is not important to you you may as well load the bitmap into a client-aligned TImage and set its Stretch property to true... -- Peter Below (TeamB) Don't be a vampire (http://slash7.com/pages/vampires), use the newsgroup archives : http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Andy Guest Posted: Wed Oct 18, 2006 1:32 pm    Post subject: Re: Drawing bitmap image on the form Hi Peter, Thanks again for the tip. Andy "Peter Below (TeamB)" <none> wrote in message news:xn0esgo9c8zkdz001 (AT) newsgroups (DOT) borland.com... Quote: Andy wrote: Thanks for the tip. How do I scale and resize an image drawn this way when the form resolution resizes, such as when using a Resizer component? Scaling a bitmap is not an easy task. You can use the TCanvas.StretchDraw method, but the algorithm Windows uses for the task does not always yield a good image quality. The graphics32 library mentioned in another reply in this thread offers alternative methods that work better. Never used it myself but is mentioned favourably quite often in this group. What you should always try, however, is to maintain the aspect ratio of your original image. If that is not important to you you may as well load the bitmap into a client-aligned TImage and set its Stretch property to true... -- Peter Below (TeamB) Don't be a vampire (http://slash7.com/pages/vampires), use the newsgroup archives : http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Graphics 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.