BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Pressing keys and getting focus          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message Analian Guest Posted: Tue Mar 29, 2005 1:52 pm    Post subject: Pressing keys and getting focus I've got a form with 20 Edit boxes in it and two buttons - OK and Cancel. I want when the user presses Enter while in this form OR in any of its child Edit boxes to set the Focus to the OK button and if the key's Escape, to set the focus to the Cancel button. So I wrote an event handler for the form's OnKeyDown event void __fastcall TForm1::FormKeyDown(TObject *Sender, WORD &Key, TShiftState Shift) { if (Key == VK_RETURN) Button1->SetFocus(); else if (Key == VK_ESCAPE) Button2->SetFocus(); } But this doesn't help me much cause the focus is on some of the edit boxes. How can I solve this matter? What comes to my mind is writing 20 handlers for each Edit box's OnKeyDown event or stupid stuff like that. What's the elegant exit of the situation? Thank you. Back to top Andrue Cope [TeamB] Guest Posted: Tue Mar 29, 2005 2:06 pm    Post subject: Re: Pressing keys and getting focus Analian wrote: Quote: But this doesn't help me much cause the focus is on some of the edit boxes. How can I solve this matter? Set the form's KeyPreview property to true. That way the form gets to see the keypress before any components. -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Analian Guest Posted: Tue Mar 29, 2005 2:11 pm    Post subject: Re: Pressing keys and getting focus Thank you. I've obiously overlooked this property. Back to top Andrue Cope [TeamB] Guest Posted: Tue Mar 29, 2005 2:18 pm    Post subject: Re: Pressing keys and getting focus Analian wrote: Quote: Thank you. I've obiously overlooked this property. Well I hope it provides the solution you need. I've used it in a couple of projects and one of them turned out to be more involved. I forget why but I remember that setting KeyPreview to true was only part of the solution. Then again that form had a bitmap and needed to 'pretend' that the bitmap had the focus. -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Analian Guest Posted: Tue Mar 29, 2005 2:54 pm    Post subject: Re: Pressing keys and getting focus Well, it works fine for me now for the purpose of catching "enter" and "escape" buttons. But help says that KeyPreview doesn't affect positioning keys. I also want the user to be able to move trough the Edit boxes. Using Tab and setting TabOrder in the desired order works fine. But how am I supposed to handle the arrow up and arrow down keypresses? I can't use KeyPreview so what am I to do? Back to top Andrue Cope [TeamB] Guest Posted: Tue Mar 29, 2005 3:06 pm    Post subject: Re: Pressing keys and getting focus Analian wrote: Quote: But how am I supposed to handle the arrow up and arrow down keypresses? Create a single event then have all the edit handlers share that. I found the following code snippet on the web. It's Delphi but easily translatable. procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState); begin if Key=VK_RETURN then Form1.Perform(WM_NEXTDLGCTL, 0, 0); end; -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Damon Chandler (TeamB) Guest Posted: Tue Mar 29, 2005 4:51 pm    Post subject: Re: Pressing keys and getting focus Hi, In addition to Andrue's suggestion, have a look at the following article... http://bcbjournal.org/articles/vol4/0007/Customized_form_navigation.htm HTH, -- Damon (TeamB) C++Builder Developer's Journal http://bcbjournal.com BCB Commonly Asked Questions http://bcbjournal.com/bcbcaq Analian wrote: Quote: Well, it works fine for me now for the purpose of catching "enter" and "escape" buttons. But help says that KeyPreview doesn't affect positioning keys. I also want the user to be able to move trough the Edit boxes. Using Tab and setting TabOrder in the desired order works fine. But how am I supposed to handle the arrow up and arrow down keypresses? I can't use KeyPreview so what am I to do? Back to top Analian Guest Posted: Tue Mar 29, 2005 6:14 pm    Post subject: Re: Pressing keys and getting focus Thank you, Andrue. I got it. Back to top Analian Guest Posted: Tue Mar 29, 2005 6:14 pm    Post subject: Re: Pressing keys and getting focus Thank you, Damon. The article's great. 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