BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TImage stretch          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message Johan Anderlund Guest Posted: Mon Apr 19, 2004 1:59 am    Post subject: TImage stretch I have some questions about TImage and how to use it as a coordinate system. I have turned stretch on, so the objects I've drawn will be stretched according to the size. I was thinking that every time an object will be drawn on the image, I resize the image to 1000 x 1000, draw the object and at last resize the image back to what is was before I drew the object. This way I dont have to bother with the pixelwidth of the pen, I can use one size all the time. Furthermore I dont have to bother with width and height ratio. The problem is when I set the image size back, objects are not stretched, so they may eventually lay outside of the image that is showed, if the current image is smaller than 1000 x 1000. Anyone have some tips and info about how to solve this kind of problem, please tell me. // Johan Back to top Peter Below (TeamB) Guest Posted: Mon Apr 19, 2004 5:37 pm    Post subject: Re: TImage stretch In article <4083328c (AT) newsgroups (DOT) borland.com>, Johan Anderlund wrote: Quote: I have some questions about TImage and how to use it as a coordinate system. I have turned stretch on, so the objects I've drawn will be stretched according to the size. I was thinking that every time an object will be drawn on the image, I resize the image to 1000 x 1000, draw the object and at last resize the image back to what is was before I drew the object. Heavens, no! What you do is size the image.picture.bitmap *once* to 1000*1000 pixels and then you draw on the image.picture.bitmap.canvas (which is in fact the same as the image.canvas). The image will then display the bitmap stretched to its own dimension. If you change the size of the image the size of its bitmap will *not* automatically change as well. -- Peter Below (TeamB) Use the newsgroup archives : http://www.mers.com/searchsite.html http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Johan Anderlund Guest Posted: Tue Apr 20, 2004 3:28 am    Post subject: Re: TImage stretch Ok, it worked well, but I got one problem. Every time I draw something on the image I'm also creating a HRgn for it. For example if I draw an rectangle with upperleft of 100,100 and downright of 200,120 then my region will have the same points. But when I check, in the MouseMove event, if PtInRegion the coordinates are not stretched as the image. Are there any special region to use, or do I've to recalculate X and Y every time in OnMouseMove? // Johan "Peter Below (TeamB)" <100113.1101 (AT) compuXXserve (DOT) com> wrote Quote: In article <4083328c (AT) newsgroups (DOT) borland.com>, Johan Anderlund wrote: I have some questions about TImage and how to use it as a coordinate system. I have turned stretch on, so the objects I've drawn will be stretched according to the size. I was thinking that every time an object will be drawn on the image, I resize the image to 1000 x 1000, draw the object and at last resize the image back to what is was before I drew the object. Heavens, no! What you do is size the image.picture.bitmap *once* to 1000*1000 pixels and then you draw on the image.picture.bitmap.canvas (which is in fact the same as the image.canvas). The image will then display the bitmap stretched to its own dimension. If you change the size of the image the size of its bitmap will *not* automatically change as well. -- Peter Below (TeamB) Use the newsgroup archives : http://www.mers.com/searchsite.html http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Peter Below (TeamB) Guest Posted: Tue Apr 20, 2004 6:31 pm    Post subject: Re: TImage stretch In article <408498cf (AT) newsgroups (DOT) borland.com>, Johan Anderlund wrote: Quote: Ok, it worked well, but I got one problem. Every time I draw something on the image I'm also creating a HRgn for it. For example if I draw an rectangle with upperleft of 100,100 and downright of 200,120 then my region will have the same points. You have to do all your drawing in the unstretched coordinate system of the bitmap. If you use mouse coordinates you have to convert them from the image (stretched) coordinate system to the bitmaps before using them. -- Peter Below (TeamB) Use the newsgroup archives : http://www.mers.com/searchsite.html http://www.tamaracka.com/search.htm http://groups.google.com http://www.prolix.be Back to top Johan Anderlund Guest Posted: Tue Apr 20, 2004 9:28 pm    Post subject: Re: TImage stretch Ok, thanks a lot. // Johan "Peter Below (TeamB)" <100113.1101 (AT) compuXXserve (DOT) com> wrote Quote: In article <408498cf (AT) newsgroups (DOT) borland.com>, Johan Anderlund wrote: Ok, it worked well, but I got one problem. Every time I draw something on the image I'm also creating a HRgn for it. For example if I draw an rectangle with upperleft of 100,100 and downright of 200,120 then my region will have the same points. You have to do all your drawing in the unstretched coordinate system of the bitmap. If you use mouse coordinates you have to convert them from the image (stretched) coordinate system to the bitmaps before using them. -- Peter Below (TeamB) Use the newsgroup archives : http://www.mers.com/searchsite.html 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.