C / C++ / MFC

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drawing / printing from dashed lines Bernhard2-Oct-01 21:38 Bernhard 2-Oct-01 21:38  in my application i have got to draw dotted, solid and dashdotted (wrong word, i know..) lines.. i create em like that: cp_dot.CreatePen (PS_COSMETIC | PS_DOT, 1, RGB (0,0,0)); cp_solid.CreatePen (PS_COSMETIC | PS_SOLID, 1, RGB (0,0,0)); cp_dashdot.CreatePen (PS_COSMETIC | PS_DASHDOT, 1, RGB (0,0,0)); the problem is that they don't appear to be dotted after printing them (the dots are like thinner normal lines..) on the screen they appear like a bunch of short lines (NO DOTS...) it's the same with the dashdot pen... can anyone help me out??? thanx in advance Bernhard stolen signature #11 "That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas." -- Buffy Re: drawing / printing from dashed lines Christian Graus3-Oct-01 1:40 Christian Graus 3-Oct-01 1:40  Get rid of PS_COSMETIC for a start. Are you saying the pen is not dotted on the screen, on a paper printout, or both ? Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Re: drawing / printing from dashed lines Bernhard3-Oct-01 1:51 Bernhard 3-Oct-01 1:51  okay... the pen is somewhat LIKE dotted on the screen.. it is drawn as many little lines (somewhat like '-- -- -- -- --', when i zoom in, it looks like '- - - - - - -'). on the paper printout it looks like a totally drawn line. the dashdot - line looks as follows.. '---- - ---- - ---- - ---- - ---' and it isn't printed correctly either... in other words.. the DOTS are too long, they look like lines.. and the dashdotted line is too long too.. i hope now you understand my problem.. btw.. i tried it without PS_COSMETIC.. it was a little bit better.. but not really as good as i wished it would be.. stolen signature #12: eople who love sausage and respect the law should never watch either one being made Re: drawing / printing from dashed lines Christian Graus3-Oct-01 1:57 Christian Graus 3-Oct-01 1:57  Hey - you stole my sig ( and lost the first letter ) !! I think you'll find the problem is so common it should probably go in the FAQ. When you print stuff, you're printing to a DC that is typically 6000 x 4000. Your screen is probably 800 x 600 or 1024 x 768. Therefore, if you draw a dotted line defined in terms of how many pixels across to draw, how many to skip, quite obviously you're going to end up with the problem that a pixel on the screen and a pixel on the page are two very different things. There are a range of GDI calls that do not print properly. Any sort of brush except a solid one is another common example of this. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. IS THERE ANYBODY WHO HAS GOT ANY WORKAROUND? Bernhard3-Oct-01 2:19 Bernhard 3-Oct-01 2:19  another stolen sig.. but he.. i´ve never claimed that it is my sig.. but.. i already knew that.. but my question is... IS THERE ANYBODY WHO HAS GOT ANY WORKAROUND for this problem... i really can't believe that you shouldn't be able to draw dotted or dashdotted line on printers.. (i think that it should work with a geometric pen..)... but i couldn't get em going... thanx for any advice bernhard stolen signature #13: To understand recursion, we must first understand recursion Re: IS THERE ANYBODY WHO HAS GOT ANY WORKAROUND? NormDroid3-Oct-01 2:28 NormDroid 3-Oct-01 2:28  Scaling correcting? LPtoDP? and don't be so rude to people who *try* and help you! Norm Almond Chief Technical Architect FS Walker Hughes Limited Re: IS THERE ANYBODY WHO HAS GOT ANY WORKAROUND? Bernhard3-Oct-01 2:35 Bernhard 3-Oct-01 2:35  if i´ve been rude.. or if somebody thought that this was rude.. i´m going to apologize.. (cause i´ve found answers to many of my answers in here...) but the answer of christian didn't help me really out.. and your answer neither.. and so i did want to make it clear that i am still missing a *real* answer.. cause maybe there is a knot in my brain.. but i would like to declare a pen that works both on screen and on the printout.. and.. the dots are on screen to "large"... this is all i wanted to say.. i know how to scale from lp to dp... but this doesn't help me... thanks in advance... bernhard stolen signature #12: People who love sausage and respect the law should never watch either one being made (i really like this one.. chris... thank you...) Re: IS THERE ANYBODY WHO HAS GOT ANY WORKAROUND? Christian Graus3-Oct-01 3:24 Christian Graus 3-Oct-01 3:24  If LPToDp does not help you then you will need to create a bitmap that defines your line pattern and stretchblt it, the same as you need to for pattern brushes. Of course you also need to figure out the size of the print DC, but I presume you've already done that. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. thank you... Bernhard3-Oct-01 3:27 Bernhard 3-Oct-01 3:27  this seems to help me out.. stolen sig #15: - I heard if you play the Windows CD backwards, you get a satanic message. - That's nothing, if you play it forward, it installs Windows! Create VC DLL for Delphi ! Please Help !!! 2-Oct-01 20:59 2-Oct-01 20:59  I want that my dll will be accessed in every foreign language like Delphi or VB. So what can I do ??? Re: Create VC DLL for Delphi ! Please Help !!! Michael P Butler2-Oct-01 23:53 Michael P Butler 2-Oct-01 23:53  Do you mean having the resources in multiple languages? If so, the usual way is to have one resource DLL per language. Michael Re: Create VC DLL for Delphi ! Please Help !!! Daniel Lohmann3-Oct-01 0:08 Daniel Lohmann 3-Oct-01 0:08  - Be sure to export your DLL functions with "C" linkage. Easiest to achive this is to use a module definition file (.DEF). - Do not use __declspec(dllimport/dllexport), 'cause this exports using so called "decorated names" which are compiler-vendor specific. - This restricts exports also to plain C functions only. It is not possible to export classes or overloaded functions (because you need decorated names for it). - Build the necessary import stuff for the other languages, e.g and UNIT for delphi that includes all symbols of your header file. Daniel -- Daniel Lohmann http://www.losoft.de Re: Create VC DLL for Delphi ! Please Help !!! Tomasz Sowinski3-Oct-01 0:26 Tomasz Sowinski 3-Oct-01 0:26  Do not use __declspec(dllimport/dllexport), 'cause this exports using so called "decorated names" which are compiler-vendor specific. This is a false statement. If you have a function with "C" linkage you can safely __declspec(dllexport) it; the name will not be mangled. There's no connection between mangling and __declspec. Tomasz Sowinski -- http://www.shooltz.com Re: Create VC DLL for Delphi ! Please Help !!! 3-Oct-01 0:29 3-Oct-01 0:29  Thank you ! But I dont understand you . I use in my DLL with classes and functions such that : extern "C" __declspec(dllexport)int Verificat(CString id, CString regfp) { MyClass dlg; dlg.DoModal(); return dlg.ReturnVal; } I do it with MFC AppWizard(dll) type: MFC Extension Dll How can I match it for Delphi ??? Re: Create VC DLL for Delphi ! Please Help !!! Michael P Butler3-Oct-01 23:20 Michael P Butler 3-Oct-01 23:20  CString is an MFC class, I don't think Delphi will understand the exported function. Try using LPCTSTR or something like that. Michael How can I convert my simple dll to a COM module ? 2-Oct-01 20:56 2-Oct-01 20:56  I want that my dll will be accessed in every foreign language like Delphi or VB. So what can I do ??? Re: How can I convert my simple dll to a COM module ? Christian Graus2-Oct-01 21:08 Christian Graus 2-Oct-01 21:08  I believe you'll find you need to write a COM dll that includes the functionality in the dll. You should use ATL for this. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Re: How can I convert my simple dll to a COM module ? David Salter3-Oct-01 10:51 David Salter 3-Oct-01 10:51  If you write your methods carefully using __stdcall as the calling convention, they should be accessibly from Delphi and VB without needing a COM wrapper. If you want to turn it into a COM module, have a look at some of the ATL tutorials available and put a wrapper around your functionality. Dave. Templates vijayaramaraju2-Oct-01 20:45 vijayaramaraju 2-Oct-01 20:45  How do we make a template class into a concrete class Re: Templates Christian Graus2-Oct-01 21:02 Christian Graus 2-Oct-01 21:02  The compiler does that for you based on every instance of the template class that has different parameters. Or you can simply remove the template declarations and replace all the places the type is refered to with a concrete type. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Simple question : What is COM dll ? And what is its different ? 2-Oct-01 20:40 2-Oct-01 20:40  Re: Simple question : What is COM dll ? And what is its different ? Michael Dunn2-Oct-01 21:56 Michael Dunn 2-Oct-01 21:56  See my Intro to COM article. --Mike-- http://home.inreach.com/mdunn/ your with and THANK YOU ! 2-Oct-01 22:36 2-Oct-01 22:36  Serialize 2-Oct-01 20:34 2-Oct-01 20:34  How can I do to make a class serializable, a class which is not derived from a CObject class. Fred. Thank for your help Re: Serialize Joel Holdsworth3-Oct-01 9:19 Joel Holdsworth 3-Oct-01 9:19  Hi Fred, If the type of class you are going to load is fixed, then the solution is simple, add a Serialize(CArchive &ar) method to the class. You create a blank object, a call this function, passing the CArchive reference to it, and hey-presto, you have a loaded class. If you have a class whose type is not fixed, your job is a little harder .. you will still need a 'Serialize' function though. The only reason you need a CObject derivation is because with it, MFC is able to dynamically reproduce the class from file data. But, as you don't have a CObject derivation, you will need to do this manually. In saving you must do three steps, 1. Store an identifyer that defines the name of your class, a string, or a just a token. 2. Get the class to serialize all it's member variables using the Serialize function. To load you must 1. Read the identifyer that defines the class type. 2. Now you know what type of class to create, create it - like this 3. Ask the class to load it's member variables from the the archive, also using the Serialize function. The code for loading might look a little like this... ar >> iClassType; switch(iClassType) { case FISH: object = new CFish(); break; case DUCK: object = new CDuck(); break; default: ASSERT(NULL); break; } object->Serialize(ar); You could even define a constructor for the object that took a reference to the CArchive as it's only parameter, so as you construct the object, it deserializes itself! I hope this all helps With time we live, with money we spend! Joel Holdsworth

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