BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Strange load in TImage while mouse moves          BorlandTalk.com Forum Index -> Delphi VCL Components Using View previous topic :: View next topic   Author Message Benny Dein Guest Posted: Wed Oct 29, 2003 9:51 pm    Post subject: Strange load in TImage while mouse moves Hi I have 55 TImage components on a single form. I takes some time to load them all, because the images should be converted and manipulated first. Therefore i've made a thread that creates an objectlist with TBitmaps with the images and when the thread terminates I load the TImages on my form from the objectlist, by assigning the bitmaps to them. How can it be, that if I move the mouse while the TImages being loaded, some of them are only partially drawn. If I don't touch the mouse ,all are shown correctly. A TImage.Repaint dosn't help. Anyone knows how to solve this? I'm using D5, Enterprise Thank in advance, Benny Back to top Finn Tolderlund Guest Posted: Wed Oct 29, 2003 10:15 pm    Post subject: Re: Strange load in TImage while mouse moves Buggy mouse driver or display driver? -- Finn Tolderlund "Benny Dein" <benremnyove (AT) thdeinis (DOT) dk> skrev i en meddelelse news:3fa035b2$1 (AT) newsgroups (DOT) borland.com... Quote: How can it be, that if I move the mouse while the TImages being loaded, some of them are only partially drawn. If I don't touch the mouse ,all are shown correctly. Back to top Benny Dein Guest Posted: Thu Oct 30, 2003 7:36 am    Post subject: Re: Strange load in TImage while mouse moves I have now tried my program on another pc with same results. It seems not to be problems with driver... Quote: Buggy mouse driver or display driver? -- Finn Tolderlund Back to top Robert Cerny Guest Posted: Thu Oct 30, 2003 11:54 am    Post subject: Re: Strange load in TImage while mouse moves Does your thread post a message to form when it finishes? Does then this message handler load the images? If not, it should be this way. The thread needs not post the message at the end, but can do it after each image (posting the image index too), if you prefer so. Lots of strange things can happen, if you assign images from the thread. -- Robert Cerny DelphiShaman "Benny Dein" <benremnyove (AT) thdeinis (DOT) dk> wrote Quote: Hi I have 55 TImage components on a single form. I takes some time to load them all, because the images should be converted and manipulated first. Therefore i've made a thread that creates an objectlist with TBitmaps with the images and when the thread terminates I load the TImages on my form from the objectlist, by assigning the bitmaps to them. How can it be, that if I move the mouse while the TImages being loaded, some of them are only partially drawn. If I don't touch the mouse ,all are shown correctly. A TImage.Repaint dosn't help. Anyone knows how to solve this? I'm using D5, Enterprise Thank in advance, Benny Back to top Finn Tolderlund Guest Posted: Thu Oct 30, 2003 4:13 pm    Post subject: Re: Strange load in TImage while mouse moves Then you will have to provide more info in order for us to be able to help you. -- Finn Tolderlund "Benny Dein" <rembdeove (AT) edbthisgruppen (DOT) dk> skrev i en meddelelse news:3fa0bf70$1 (AT) newsgroups (DOT) borland.com... Quote: I have now tried my program on another pc with same results. It seems not to be problems with driver... Buggy mouse driver or display driver? Back to top Benny Dein Guest Posted: Thu Oct 30, 2003 9:09 pm    Post subject: Re: Strange load in TImage while mouse moves Lets say I have a form with 20 TImage on it, that are loaded with some jpegs. The TImage dosn't do a resample when loading, so the images are not 'smooth' and nice. I have found an algoritme for resampling them which takes about 0.5 seconds for each. I don't want the user to wait for this, so I do a resample of each image in background, in a thread. When the thread terminates it places resampled bitmaps in an objectlist (property on my form) on the form and asks the form to reload the images from this objectlist. Now the main form assign the bitmaps into the images on the form. If I don't move the mouse under this last proces all works fine. If I move the mouse, some of the images turn all white, some are ok and some are partially white and partially ok. Blev du klogere af det? "Finn Tolderlund" <no (AT) spam (DOT) dk> skrev i en meddelelse news:3fa138b5 (AT) newsgroups (DOT) borland.com... Quote: Then you will have to provide more info in order for us to be able to help you. -- Finn Tolderlund "Benny Dein" <rembdeove (AT) edbthisgruppen (DOT) dk> skrev i en meddelelse news:3fa0bf70$1 (AT) newsgroups (DOT) borland.com... I have now tried my program on another pc with same results. It seems not to be problems with driver... Buggy mouse driver or display driver? Back to top Finn Tolderlund Guest Posted: Fri Oct 31, 2003 6:54 am    Post subject: Re: Strange load in TImage while mouse moves "Benny Dein" <benremnyove (AT) thdeinis (DOT) dk> skrev i en meddelelse news:3fa17d4d$1 (AT) newsgroups (DOT) borland.com... Quote: Lets say I have a form with 20 TImage on it, that are loaded with some jpegs. The TImage dosn't do a resample when loading, so the images are not 'smooth' and nice. I have found an algoritme for resampling them which takes about 0.5 seconds for each. I don't want the user to wait for this, so I do a resample of each image in background, in a thread. When the thread terminates it places resampled bitmaps in an objectlist (property on my form) on the form and asks the form to reload the images from this objectlist. Now the main form assign the bitmaps into the images on the form. If I don't move the mouse under this last proces all works fine. If I move the mouse, some of the images turn all white, some are ok and some are partially white and partially ok. Blev du klogere af det? Ja måske. The first thing that comes to mind is that your thread code is faulty. What have you done to debug this? Have you tried to remove the thread thing and just load the images without resampling, how does it work then? Can you make a small app that shows the problem and post it in b.p.attachments? -- Finn Tolderlund Back to top Benny Dein Guest Posted: Mon Nov 03, 2003 7:57 pm    Post subject: Re: Strange load in TImage while mouse moves Thanks for helping! I have now tried replacing the resamling code by a simple reload in same quality as original. It seems as the failure is in the resample algorithme, because avoiding this code gives me ok images. Benny Quote: The first thing that comes to mind is that your thread code is faulty. What have you done to debug this? Have you tried to remove the thread thing and just load the images without resampling, how does it work then? Can you make a small app that shows the problem and post it in b.p.attachments? -- Finn Tolderlund Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi VCL Components Using 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.