BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  PaintBox invalidation and movable panel          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message dpap Guest Posted: Wed Jul 05, 2006 10:53 pm    Post subject: PaintBox invalidation and movable panel Hi, in my application i use a paintbox to plot a large design. In the onpaint event i wrote code that draws the apropriate part of the design and works right. Now i put some movable panels (JvPanel) at spesific places over the paintbox. Draging the panel with mouse works fine but, i want to move the panel progarmmatically together with the desined area. Placing the statements Panel.left := x; Panel.top := y in the onpaint event makes the paintbox to infinitally draws itself. What is the right place or method to move the panels without redrawing the paintbox (as it happens when i mouve them by mouse) ? thanks in advance Back to top Charles Hacker Guest Posted: Thu Jul 06, 2006 4:29 am    Post subject: Re: PaintBox invalidation and movable panel dpap wrote: Quote: in my application i use a paintbox to plot a large design. In the onpaint event i wrote code that draws the apropriate part of the design and works right. Now i put some movable panels (JvPanel) at spesific places over the paintbox. Draging the panel with mouse works fine but, i want to move the panel progarmmatically together with the desined area. Placing the statements Panel.left := x; Panel.top := y in the onpaint event makes the paintbox to infinitally draws itself. What is the right place or method to move the panels without redrawing the paintbox (as it happens when i mouve them by mouse) ? Well from the above it is hard to really know what you are trying to achieve. Perhaps you could post some sample code, or place a demo app in 'attachments' newsgroup, so we can take a look. However, from what I can detemrmine from the above information, I am guessing there may be a better way to achieve your desired outcome. -- Charles Hacker Lecturer in Electronics and Computing School of Engineering Griffith University - Gold Coast Australia Back to top Peter Below (TeamB) Guest Posted: Thu Jul 06, 2006 10:55 pm    Post subject: Re: PaintBox invalidation and movable panel dpap wrote: Quote: Hi, in my application i use a paintbox to plot a large design. In the onpaint event i wrote code that draws the apropriate part of the design and works right. Now i put some movable panels (JvPanel) at spesific places over the paintbox. Draging the panel with mouse works fine but, i want to move the panel progarmmatically together with the desined area. Placing the statements Panel.left := x; Panel.top := y in the onpaint event makes the paintbox to infinitally draws itself. What is the right place or method to move the panels without redrawing the paintbox (as it happens when i mouve them by mouse) ? You cannot do it in the OnPaint event since moving the panel forces the paintbox to redraw, so you get recursion. You have to do it from elsewhere, but from your description it is not evident how the panels connect to the displayed "design". -- 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 dpap Guest Posted: Fri Jul 07, 2006 4:11 am    Post subject: Re: PaintBox invalidation and movable panel Quote: You cannot do it in the OnPaint event since moving the panel forces the paintbox to redraw, so you get recursion. You have to do it from elsewhere, but from your description it is not evident how the panels connect to the displayed "design". I want to draw a tablet at a speific place of the drawing to include some information about this point (X,Y coords, etc). Thie tablet must be movable with the mouse, to be able to reposition by user, but also must be moved (programmatically) when the user scrolls the drawing. I use JvPanel (Jedi 3) but i don't know how to reposition it so to accompany the drawind at every place. I realize that it wasn't the better way so i change my code do the same without panels, just plotting commands, and i have achieve it but i'm still curious. thanks Back to top Peter Below (TeamB) Guest Posted: Fri Jul 07, 2006 11:28 pm    Post subject: Re: PaintBox invalidation and movable panel dpap wrote: Quote: You cannot do it in the OnPaint event since moving the panel forces the paintbox to redraw, so you get recursion. You have to do it from elsewhere, but from your description it is not evident how the panels connect to the displayed "design". I want to draw a tablet at a speific place of the drawing to include some information about this point (X,Y coords, etc). Thie tablet must be movable with the mouse, to be able to reposition by user, but also must be moved (programmatically) when the user scrolls the drawing. I use JvPanel (Jedi 3) but i don't know how to reposition it so to accompany the drawind at every place. I realize that it wasn't the better way so i change my code do the same without panels, just plotting commands, and i have achieve it but i'm still curious. thanks In this case you would have to detect the scroll event and reposition the panels there. If your paintbox sits in a scrollbox you should be able to just parent the panels to the scrollbox to get them scrolled with the paintbox. -- 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.