BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Hiding properties/methods          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Development) View previous topic :: View next topic   Author Message Elizabeth Guest Posted: Mon Apr 04, 2005 1:18 pm    Post subject: Hiding properties/methods Hi All, A derived component displays all the properties in the object inspector of the parent component which are published . How to hide the properties/methods of a parent component in the derived component?. Thanks, Back to top Sascha Meijer Guest Posted: Mon Apr 04, 2005 3:21 pm    Post subject: Re: Hiding properties/methods Properties which are published are always published. You can redeclare them in the private or protected section, so acces from outside the class will be prohibited by the compiler, but you can still see them in the Object Inspector. It is a Borland issue. Greetings, Sascha. "Elizabeth" <vaab (AT) hcncjk (DOT) com> schreef in bericht news:42513e7b (AT) newsgroups (DOT) borland.com... Quote: Hi All, A derived component displays all the properties in the object inspector of the parent component which are published . How to hide the properties/methods of a parent component in the derived component?. Thanks, Back to top Remy Lebeau (TeamB) Guest Posted: Mon Apr 04, 2005 6:14 pm    Post subject: Re: Hiding properties/methods "Elizabeth" <vaab (AT) hcncjk (DOT) com> wrote Quote: A derived component displays all the properties in the object inspector of the parent component which are published. How to hide the properties/methods of a parent component in the derived component?. Once a property is published, it is always published. If the class you are deriving from has a TCustom... base class of its own, it is better to derive from the TCustom... class instead (ie: TCustomEdit instead of TEdit). The TCustom... classes are designed to not publish their properties so that you can pick and choose which properties you want to publish yourself. If that is not an option, then the only other alternative is to register NULL property editors for those properties you wish to un-publish. The properties will still exist, and can be accessed programmably, but the Object Inspector will not display them. Gambit Back to top Todd Brylski Guest Posted: Mon Apr 04, 2005 6:23 pm    Post subject: Re: Hiding properties/methods class PACKAGE TNewSpeedButton : public TSpeedButton { private: protected: public: __fastcall TNewSpeedButton(TComponent* Owner); __published: __property int Margin = { }; //Margin will not appear in Object Inspector }; But.... you can not prevent the user of your component from accessing the property at run time. The user code can cast the object to the base class: ((TSpeedButton*)NewSpeedButton1)->Margin = 12345; That's not good. If the component your are deriving from is one of the VCL components then derive from one of the TCustom??? classes and republish the properties that you need. Todd "Elizabeth" <vaab (AT) hcncjk (DOT) com> wrote Quote: A derived component displays all the properties in the object inspector of the parent component which are published . How to hide the properties/methods of a parent component in the derived component?. Back to top Elizabeth Guest Posted: Tue Apr 05, 2005 6:43 am    Post subject: Re: Hiding properties/methods Hi All, Thanks for your response. There is an API UnlistPublishedProperty(Class, PropName) which can be used to remove the properties from the object inspector.This is a new feature present in BCB6.Refer the help file. It requires designintf.hpp and designide.bpi. However you cannot prevent the access of properties/methods programmatically. This still remains an issue for me. Thanks, Elizabeth "Elizabeth" <vaab (AT) hcncjk (DOT) com> wrote Quote: Hi All, A derived component displays all the properties in the object inspector of the parent component which are published . How to hide the properties/methods of a parent component in the derived component?. 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