BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TRichEdit Hyperlinks Goto page 1, 2  Next          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message René Rudolf Guest Posted: Wed Apr 28, 2004 1:34 pm    Post subject: TRichEdit Hyperlinks Hi, i've implemented the following code for hyperlink support in trichedit control: //-------------------------------------------------------------------------- - *.cpp //-------------------------------------------------------------------------- - void __fastcall TForm1::FormCreate(TObject *Sender) { int i = RichEdit1->Perform(EM_GETEVENTMASK, 0, 0); RichEdit1->Perform(EM_SETEVENTMASK, 0, i | ENM_LINK); RichEdit1->Perform(EM_AUTOURLDETECT, true, 0); RichEdit1->Lines->LoadFromFile("C:\test.rtf"); } //-------------------------------------------------------------------------- - void __fastcall TForm1::WndProc(TMessage &Message) { if (Message.Msg == WM_NOTIFY) { LPNMHDR lpNmhdr = reinterpret_cast <LPNMHDR>(Message.LParam); if (lpNmhdr->code == EN_LINK) { ENLINK *lpENLink = reinterpret_cast<ENLINK *>(lpNmhdr); if (lpENLink->msg == WM_LBUTTONUP) ShellExecute(Handle, "open", RichEdit1->Text.SubString(lpENLink->chrg.cpMin + 1, lpENLink->chrg.cpMax - lpENLink->chrg.cpMin).c_str(), NULL, NULL, SW_SHOWDEFAULT); } } else TForm::WndProc(Message); } //-------------------------------------------------------------------------- - On Windows XP it works fine, but on windows 98 it doesn't happens anything... why... Thanks in advance, René Back to top Oren Guest Posted: Wed Apr 28, 2004 2:13 pm    Post subject: Re: TRichEdit Hyperlinks it will only work for "Rich Text Edit Control", v2.0 and v3.0 as far as i know Windows 98 uses the version 1.0 so here is the problem :-) Oren Back to top Hans Galema Guest Posted: Wed Apr 28, 2004 2:54 pm    Post subject: Re: TRichEdit Hyperlinks René Rudolf wrote: Quote: i've implemented the following code for hyperlink support in trichedit control: void __fastcall TForm1::FormCreate(TObject *Sender) Oh dear. Still people that use FormCreate. Better place that code in the constructor. Quote: RichEdit1->Lines->LoadFromFile("C:\test.rtf"); On Windows XP it works fine, but on windows 98 it doesn't happens anything... why... it doesn't happens anything... ? Don't know why. Tried your code on WIn98SE and there are already 4 WM_NOTIFY's at startup and one EN_REQUESTRESIZE 0x0701. Then if I click in the richedit there is a EN_SELCHANGE 0x0702 You could be as kind as to place a rtf file that contains hyperlinks in the attachmentgroup. I have no such file, have no idea how a hyperlink would look and would be pleased to see one. Then I could test also for the EN_LINK message. Hans. Back to top René Rudolf Guest Posted: Wed Apr 28, 2004 3:28 pm    Post subject: Re: TRichEdit Hyperlinks hi, i don't think that there is a big difference beetween constructor and formcreate for this program at least (i've tested both examples; no difference)... my programs runs on win 98 (no second edition)... Are there different richedit control versions installed (win98, win98se)??? If true, where can i get an update for the richedit control? testfile?: goto wordpad or word and type in a hyperlink e.g: http://www.microsoft.com and safe it as rtf... regards, René "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> schrieb im Newsbeitrag news:408fc41a$1 (AT) newsgroups (DOT) borland.com... Quote: René Rudolf wrote: i've implemented the following code for hyperlink support in trichedit control: void __fastcall TForm1::FormCreate(TObject *Sender) Oh dear. Still people that use FormCreate. Better place that code in the constructor. RichEdit1->Lines->LoadFromFile("C:\test.rtf"); On Windows XP it works fine, but on windows 98 it doesn't happens anything... why... it doesn't happens anything... ? Don't know why. Tried your code on WIn98SE and there are already 4 WM_NOTIFY's at startup and one EN_REQUESTRESIZE 0x0701. Then if I click in the richedit there is a EN_SELCHANGE 0x0702 You could be as kind as to place a rtf file that contains hyperlinks in the attachmentgroup. I have no such file, have no idea how a hyperlink would look and would be pleased to see one. Then I could test also for the EN_LINK message. Hans. Back to top Hans Galema Guest Posted: Wed Apr 28, 2004 4:40 pm    Post subject: Re: TRichEdit Hyperlinks René Rudolf wrote: Quote: i don't think that there is a big difference beetween constructor and formcreate for this program at least (i've tested both examples; no difference)... Indeed. It can be the same. Quote: my programs runs on win 98 (no second edition)... Are there different richedit control versions installed (win98, win98se)??? If true, where can i get an update for the richedit control? Don't know if they are different. You could have told us the sizes of the dll's on your system. On mine in the windowssystem32 dir: Riched32.dll 3856 bytes Riched.dll 241.047 bytes riched20.dll 421.888 bytes If you need one I can post to the attachmentsgroup. But I think Oren is right. Maybe you can use them from an XP system ? Why not try ? Quote: testfile?: goto wordpad or word and type in a hyperlink e.g: http://www.microsoft.com and safe it as rtf... Well that I can type in a TRichEdit too. But that is not a hyperlink! That is an URL! So there is nothing special on it. But then that richedit would recognise the sequence 'http://' and underline it ? What does it exactly? Hans. Back to top Hans Galema Guest Posted: Wed Apr 28, 2004 4:42 pm    Post subject: Re: TRichEdit Hyperlinks René Rudolf wrote: Quote: Don't know why. Tried your code on WIn98SE and there are already 4 WM_NOTIFY's at startup and one EN_REQUESTRESIZE 0x0701. You quoted my whole post which is not needed and annoying, But you did not even react on my testresults. Why not ? Hans. Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 28, 2004 5:28 pm    Post subject: Re: TRichEdit Hyperlinks "René Rudolf" <rene.rudolf (AT) itshop (DOT) de> wrote Quote: void __fastcall TForm1::FormCreate(TObject *Sender) Do not use the OnCreate event in C++. It is a Delphi remnant that can be triggered before the constructor, which is illegal in C++. Use the constructor instead, or else delay the code until after the form is fully constructed. Quote: void __fastcall TForm1::WndProc(TMessage &Message) { if (Message.Msg == WM_NOTIFY) You should be subclassing the TRichEdit directly and then intercepting the CM_NOTIFY message instead. The VCL wraps WM_NOTIFY and WM_COMMAND and similar messages in such as way that components can process their own notification messages directly, which the Parent would normally handle instead. Quote: RichEdit1->Text.SubString(lpENLink->chrg.cpMin + 1, lpENLink->chrg.cpMax - lpENLink->chrg.cpMin).c_str() I would suggest you look at using the EM_GETTEXTRANGE message instead. Quote: On Windows XP it works fine, but on windows 98 it doesn't happens anything... why... Because TRichEdit uses the RichEdit v1.0 control, which does not support hyperlink processing. The only reason why it works in XP is because XP replaced the RichEdit 1.0 control with a newer one, so that any time an application tried to create an instance of the 1.0 control, the newer one is created instead, and it is backwards-compatible with 1.0 coding. If you want hyperlink support in Win98, then you can't use TRichEdit. You will have to load the RichEdit 2.0+ control yourself manually. I suggest you go to Robert Dunn's website (http://home.att.net/~robertdunn/Yacs.html) and get his free RichEdit component. It does all of the work for you. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 28, 2004 5:30 pm    Post subject: Re: TRichEdit Hyperlinks "René Rudolf" <rene.rudolf (AT) itshop (DOT) de> wrote Quote: Are there different richedit control versions installed (win98, win98se)??? Yes. Newer versions of Windows has newer versions of the RichEdit control, and each new version introduces new RichEdit features. Quote: If true, where can i get an update for the richedit control? Not without updating the OS itself. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 28, 2004 5:32 pm    Post subject: Re: TRichEdit Hyperlinks "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> wrote Quote: Well that I can type in a TRichEdit too. But that is not a hyperlink! That is an URL! They are the same thing, as far as the underlying text itself is concerned. The only difference between a hyperlink and a URL is that a hyperlink is clickable, and when clicked will launch the user's default browser to the specified URL. Newer versions of RichEdit can automatically recognize URLs in the text and convert them to hyperlinks when displaying the text. Gambit Back to top René Rudolf Guest Posted: Wed Apr 28, 2004 5:32 pm    Post subject: Re: TRichEdit Hyperlinks "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> schrieb im Newsbeitrag news:408fdcdc$1 (AT) newsgroups (DOT) borland.com... Quote: René Rudolf wrote: i don't think that there is a big difference beetween constructor and formcreate for this program at least (i've tested both examples; no difference)... Indeed. It can be the same. my programs runs on win 98 (no second edition)... Are there different richedit control versions installed (win98, win98se)??? If true, where can i get an update for the richedit control? Don't know if they are different. You could have told us the sizes of the dll's on your system. On mine in the windowssystem32 dir: Riched32.dll 3856 bytes Riched.dll 241.047 bytes riched20.dll 421.888 bytes Riched32.dll 188.416 bytes Riched.dll 241.035 bytes riched20.dll 431.133 bytes so, they are really different but the installed version is the same (riched20.dll)... Quote: If you need one I can post to the attachmentsgroup. But I think Oren is right. Maybe you can use them from an XP system ? Why not try ? yes, you can post it, but i will use this code snippet for a commercial software. but im still searching for an offical microsoft update pack, which i can redistribute with this software... Quote: testfile?: goto wordpad or word and type in a hyperlink e.g: http://www.microsoft.com and safe it as rtf... Well that I can type in a TRichEdit too. But that is not a hyperlink! That is an URL! Right. But under XP it works perfect for me. Under Win 98 the link will be highlighted but not executed... Quote: So there is nothing special on it. But then that richedit would recognise the sequence 'http://' and underline it ? What does it exactly? For a correct "URL" save the rtf under word. I've noticed that word creates a correct one. If you need this rtf-file i can post it, too. Quote: Hans. René Back to top René Rudolf Guest Posted: Wed Apr 28, 2004 5:40 pm    Post subject: Re: TRichEdit Hyperlinks "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> schrieb im Newsbeitrag news:408fdd4e$1 (AT) newsgroups (DOT) borland.com... Quote: René Rudolf wrote: Don't know why. Tried your code on WIn98SE and there are already 4 WM_NOTIFY's at startup and one EN_REQUESTRESIZE 0x0701. You quoted my whole post which is not needed and annoying, sorry, but it was not in my mind... Quote: But you did not even react on my testresults. Why not ? on windows 98 fe its the same... but i've no win98 se for trying yet... Quote: Hans. René Back to top René Rudolf Guest Posted: Wed Apr 28, 2004 5:45 pm    Post subject: Re: TRichEdit Hyperlinks "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> schrieb im Newsbeitrag news:408feb90 (AT) newsgroups (DOT) borland.com... Quote: "René Rudolf" <rene.rudolf (AT) itshop (DOT) de> wrote in message news:408fcdb5$1 (AT) newsgroups (DOT) borland.com... Are there different richedit control versions installed (win98, win98se)??? Yes. Newer versions of Windows has newer versions of the RichEdit control, and each new version introduces new RichEdit features. If true, where can i get an update for the richedit control? Not without updating the OS itself. i know, it's not the right place for this question. but where can i get an update for all os's, which i have to update? Quote: Gambit René Back to top René Rudolf Guest Posted: Wed Apr 28, 2004 6:04 pm    Post subject: Re: TRichEdit Hyperlinks "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> schrieb im Newsbeitrag news:408feb27$1 (AT) newsgroups (DOT) borland.com... Quote: "René Rudolf" <rene.rudolf (AT) itshop (DOT) de> wrote in message news:408fb2ff$1 (AT) newsgroups (DOT) borland.com... void __fastcall TForm1::FormCreate(TObject *Sender) Do not use the OnCreate event in C++. It is a Delphi remnant that can be triggered before the constructor, which is illegal in C++. Use the constructor instead, or else delay the code until after the form is fully constructed. i know, but it was only for testing purposes ;) Quote: void __fastcall TForm1::WndProc(TMessage &Message) { if (Message.Msg == WM_NOTIFY) You should be subclassing the TRichEdit directly and then intercepting the CM_NOTIFY message instead. The VCL wraps WM_NOTIFY and WM_COMMAND and similar messages in such as way that components can process their own notification messages directly, which the Parent would normally handle instead. RichEdit1->Text.SubString(lpENLink->chrg.cpMin + 1, lpENLink->chrg.cpMax - lpENLink->chrg.cpMin).c_str() I would suggest you look at using the EM_GETTEXTRANGE message instead. you are right. i will have a look on it... Quote: On Windows XP it works fine, but on windows 98 it doesn't happens anything... why... Because TRichEdit uses the RichEdit v1.0 control, which does not support hyperlink processing. The only reason why it works in XP is because XP replaced the RichEdit 1.0 control with a newer one, so that any time an application tried to create an instance of the 1.0 control, the newer one is created instead, and it is backwards-compatible with 1.0 coding. If you want hyperlink support in Win98, then you can't use TRichEdit. You will have to load the RichEdit 2.0+ control yourself manually. I suggest you go to Robert Dunn's website (http://home.att.net/~robertdunn/Yacs.html) and get his free RichEdit component. It does all of the work for you. Nice, but i want avoid to use an extra component for the hyperlinks. But if there are no other possibilities i will use this one. Quote: Gambit René Back to top Remy Lebeau (TeamB) Guest Posted: Wed Apr 28, 2004 7:01 pm    Post subject: Re: TRichEdit Hyperlinks "René Rudolf" <rene.rudolf (AT) itshop (DOT) de> wrote Quote: i know, it's not the right place for this question. but where can i get an update for all os's, which i have to update? Hyperlink support was introduced in RichEdit 2.0. The only OS that doesn't already have RichEdit 2.0 available is Win95. However, Riched20.dll is compatible with Win95, should you choose to install it manually. However, TRichEdit will still not be able to use RichEdit 2.0 at all even if it is installed. I still recommend that you get Robert Dunn's free component to replace TRichEdit in your code altogether. Internally, it determines the RichEdit control version available and can automatically use a newer version if available. It derives from TCustomRichEdit, so all of your existing TRichEdit code will work with his component. Otherwise, you will just have to write your own RichEdit 2.0+ code manually from scratch. Gambit Back to top Hans Galema Guest Posted: Wed Apr 28, 2004 7:13 pm    Post subject: Re: TRichEdit Hyperlinks René Rudolf wrote: Quote: But if there are no other possibilities i will use this one. hTen there is no need to post the dll's. Right ? 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