BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Default text & Icon for installing component          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Development) View previous topic :: View next topic   Author Message Ettienne Gilbert Guest Posted: Fri Jul 22, 2005 2:41 pm    Post subject: Default text & Icon for installing component I've created (my first!) component - a THexEdit component derived from TEdit. Idea is to allow user to only enter hexadecimal characters (0-9, A-F,a-f). Will expand it as soon as the basics work OK. Class declaration looks as follows: class PACKAGE THexEdit : public TEdit { private: Classes::TNotifyEvent FOnChange; bool inChange; char fill; void __fastcall SetFill( char fill ); protected: DYNAMIC void __fastcall Change(void); virtual void __fastcall Loaded(void); public: __fastcall THexEdit(TComponent* Owner); __published: __property char Fill = {read = fill, write = SetFill, default = 'F'}; __property Classes::TNotifyEvent OnChange = {read=FOnChange, write=FOnChange}; }; I'm rejecting non-hexadecimal characters in overloaded TCustomEdit::Change() method - in these cases I also do not call user's OnChange event handler. Everything seems to be working OK so far, but I cannot stop the Text property defaulting to the component Name property when the component is added to a form. I've overloaded the component's Loaded() method, as in... void __fastcall THexEdit::Loaded(void) { TEdit::Loaded(); //TControl::Loaded() method Text = ""; } This cures the problem for run-time, but not design-time. What is the right approach so that the Text property is cleared when component is added to form? Also, when I install the Component to the Palette (Component | Install Component), there is no way to specify your own icon for the Palette. Is this possible? I'm still on BCB 5.... Many thanks Ettienne Back to top Pete Fraser Guest Posted: Fri Jul 22, 2005 3:53 pm    Post subject: Re: Default text & Icon for installing component The icon needs to have the same name as the package HTH Pete "Ettienne Gilbert" <ettienneg (AT) prism (DOT) co.za> wrote Quote: I've created (my first!) component - a THexEdit component derived from TEdit. Idea is to allow user to only enter hexadecimal characters (0-9, A-F,a-f). Will expand it as soon as the basics work OK. Class declaration looks as follows: class PACKAGE THexEdit : public TEdit { private: Classes::TNotifyEvent FOnChange; bool inChange; char fill; void __fastcall SetFill( char fill ); protected: DYNAMIC void __fastcall Change(void); virtual void __fastcall Loaded(void); public: __fastcall THexEdit(TComponent* Owner); __published: __property char Fill = {read = fill, write = SetFill, default = 'F'}; __property Classes::TNotifyEvent OnChange = {read=FOnChange, write=FOnChange}; }; I'm rejecting non-hexadecimal characters in overloaded TCustomEdit::Change() method - in these cases I also do not call user's OnChange event handler. Everything seems to be working OK so far, but I cannot stop the Text property defaulting to the component Name property when the component is added to a form. I've overloaded the component's Loaded() method, as in... void __fastcall THexEdit::Loaded(void) { TEdit::Loaded(); //TControl::Loaded() method Text = ""; } This cures the problem for run-time, but not design-time. What is the right approach so that the Text property is cleared when component is added to form? Also, when I install the Component to the Palette (Component | Install Component), there is no way to specify your own icon for the Palette. Is this possible? I'm still on BCB 5.... Many thanks Ettienne Back to top Remy Lebeau (TeamB) Guest Posted: Fri Jul 22, 2005 5:53 pm    Post subject: Re: Default text & Icon for installing component "Ettienne Gilbert" <ettienneg (AT) prism (DOT) co.za> wrote Quote: I'm rejecting non-hexadecimal characters in overloaded TCustomEdit::Change() method Intercepting them as they are being typed would be better. Look at overriding the KeyUp/Down() and/or KeyPress() methods instead. Setting the Key parameter to 0 rejects the keystroke. Quote: What is the right approach so that the Text property is cleared when component is added to form? In the constructor, remove the csSetCaption flag from the component's ControlStyle property. Quote: Also, when I install the Component to the Palette (Component | Install Component), there is no way to specify your own icon for the Palette. Yes, there is. You have to include the icon into the resources of the package itself. Create a new .res file that includes a 24x24 bitmap, and then name the bitmap the same name as your component class name, in all caps ("THEXEDIT" in this case). Then add the .res file to your package. Quote: Is this possible? Obviously so, since every other component has its own icon. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Fri Jul 22, 2005 5:53 pm    Post subject: Re: Default text & Icon for installing component "Pete Fraser" <pete.fraser (AT) frasersoft (DOT) nospam.com> wrote Quote: The icon needs to have the same name as the package No, the icon has to have the same name as the component itself, not the package. Gambit Back to top Rudy Velthuis [TeamB] Guest Posted: Fri Jul 22, 2005 11:02 pm    Post subject: Re: Default text & Icon for installing component At 17:53:11, 22.07.2005, Pete Fraser wrote: Quote: The icon needs to have the same name as the package Pete, you quoted* 50 lines, and only added the text above. Please note that this is a violation of the guidelines in http://support.borland.com/entry.jspa?externalID=294 rule #1. *Quoting is copying (automatically or manually) text from the previous message into your own. Quoted lines are usually marked by one or more > at the beginning of the line. Please don't quote entire messages, but only just enough to give the reader a reference. More on proper quoting can be found here: http://blogs.teamb.com/rudyvelthuis/articles/7509.aspx http://www.uwasa.fi/~ts/http/quote.html http://alt-usage-english.org/posting_quotes.html Thanks for your future compliance with Borland's guidelines. -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "So I went to the dentist. He said "Say Aaah." I said "Why?" He said "My dog's died.'" -- Tommy Cooper Back to top Ettienne Gilbert Guest Posted: Tue Jul 26, 2005 7:13 am    Post subject: Re: Default text & Icon for installing component Thanks Remy - component is working now. 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