C / C++ / MFC

FirstPrevNext

Re: How can I determine the size of dynamic array? Christian Graus11-Sep-01 3:53 Christian Graus 11-Sep-01 3:53  Actually you *can* do it - sizeof(array)/sizeof(int). Apparantly it's not recommended, but it works. I second you though - vector is the obvous solution. 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 determine the size of dynamic array? Tomasz Sowinski11-Sep-01 4:01 Tomasz Sowinski 11-Sep-01 4:01  No, you can't. He's using new and array is allocated on the heap, so sizeof(array) will be the size of pointer. This trick works only with global or stack-allocated arrays; I don't beleive it's not recommended in such case. Tomasz Sowinski -- http://www.shooltz.com Re: How can I determine the size of dynamic array? Christian Graus11-Sep-01 4:34 Christian Graus 11-Sep-01 4:34  Fair enough - I read your response and remember seeing the method I quoted in a book, I've never used it and so have never thought it through. 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 determine the size of dynamic array? Masaaki Onishi11-Sep-01 5:44 Masaaki Onishi 11-Sep-01 5:44  Hello, the codegurus around the world.;) ANCI C++ type array doesn't have the same functionality like MFC array classes like CAarray, CStringArray, and so on. In this case, you can create your own class called CdoubleArray, and create the member function GetSize().... Have a nice day! -Masaaki Onishi- saving drawings in a VIEW 11-Sep-01 2:36 11-Sep-01 2:36  Hi there! I've created a program in AppWizard - just a SDI with a CVIEW and i've been using a CDC->LineTo(X,Y) to draw stuff.. I would like to be able to save this as a .jpeg, .gif or something.. HOW can I get this done? Re: saving drawings in a VIEW Christian Graus11-Sep-01 3:55 Christian Graus 11-Sep-01 3:55  First you need to change your code so it draws stuff onto a bitmap and then show that bitmap in OnPrepareDC, then you can use CXImage from this site to save that file using one of the formats you mentioned. You may also find it helpful to look at GDI+, although I hear the guy who wrote most of the artcles on the subject here has no idea, you may like to check them out anyhow. GDI+ saves and loads these formats, and also has a lot of new cool stuff. 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. Check the "Key-Pressed" Status 11-Sep-01 1:50 11-Sep-01 1:50  Hi All! I've a problem : Into an application I'm developing, I need to check if a key (or a key set) is pressed and handle this event. Well : I can now capture the event "key_is_pressed", but I can't avoid the event this pression generates. For Example : If an user on W98 presses the keys CTRL+ALT+Canc I receive from my application an error status, and I show a dialog like "what do you do?". So, All seems ok but, after the Dialog has been shown, I can't avoid the visualization of the task-list window. How Can I do? N.B : that's only an example : the same problem was encountered while monitoring the status of ALT+F4 or CTRL+Esc etc.etc... Thanx All Alessio Re: Check the "Key-Pressed" Status Christian Graus11-Sep-01 2:16 Christian Graus 11-Sep-01 2:16  You need a keyboard hook to intercept the message and stop Windows acting on it. Sorry, I've never written one, so I can't help more, but that is most certainly what you want. 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. VB vs VC++ in User Interfaces Alberto Bar-Noy11-Sep-01 1:27 Alberto Bar-Noy 11-Sep-01 1:27  Hi all, I am designing a project which can be separated into two layers. 1. The user interface 2. the business logic. The business logic has to be developed as COM components (since it will need to be reused in other environments) The question is in which language (environment) to write the users interface. Should I do it in Visual Basic or Visual C++ (or other)? Thanks in advance Alberto Gattegno Software Engineer http://www.itgil.com Re: VB vs VC++ in User Interfaces Anders Molin11-Sep-01 1:30 Anders Molin 11-Sep-01 1:30  I would use VC++, but it's because I can't write a line of VB... If you are good at VB, it's AFAIK a lot more easy to use COM objects from VB that it is from VC++. - Anders Money talks, but all mine ever says is "Goodbye!" Re: VB vs VC++ in User Interfaces Christian Graus11-Sep-01 1:32 Christian Graus 11-Sep-01 1:32  This is a loaded question. It depends what you want to do. If you want to get an interface up quickly, then the answer is obviously VB. If you want have maximum flexibility then you need C++, where you can create controls derived from those provided by MFC. Personally I have my doubts about how fast VB is compared to someone who is proficient in VC, but on the other hand your components are obviously going to be written to take advantage of VB's hiding implimentation details from you, which further simplifies your task. Did I just recommend VB to someone ? I'm hoping not.... Personally I would go VC++/MFC if I was doing it professionally and VC++/WTL if I was doing it for fun ( because I've not done much WTL ). 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: VB vs VC++ in User Interfaces Michael P Butler11-Sep-01 3:08 Michael P Butler 11-Sep-01 3:08  Write it in whatever you are most experienced with. I had a similiar situation where I had a Telephony component written as a COM object. At first I thought that it would be easier and quicker to write the UI in VB. However in the end I decided to use MFC because that is what I've been using for the past 8 years. Michael CDTPicker format 10-Sep-01 23:52 10-Sep-01 23:52  Anyone know if the CDTPicker can do 00:00 - 24:00 format? If so, how does one achieve this? Right now I can only get it to go from 00:00 to 23:59. If anyone could point me to some decent instructions regarding the control I'd most appreciate it. Regards, John Re: CDTPicker format Tomasz Sowinski11-Sep-01 0:08 Tomasz Sowinski 11-Sep-01 0:08  If anyone could point me to some decent instructions regarding the control MSDN has more info here. You can try to use 'callback fields' in the format string. However, I'm not sure if you'll be able to go beyond 23:59. Tomasz Sowinski -- http://www.shooltz.com Re: CDTPicker format 11-Sep-01 21:57 11-Sep-01 21:57  >MSDN has more info here. > >You can try to use 'callback fields' in the format string. However, I'm not >sure if you'll be able to go beyond 23:59. Thanks for the advice, and I think that the callback fields will work provided I can do one of the following: a) Get access to the event of a click on the dtpicker's spin control so that I can use it to modify the psuedo-hour-field that I created. or b) Get the dtpicker to display itself such that the spin control AND the drop down menu are not visible nor accessable. I don't want to give the user any false affordances. Regards, John Re: CDTPicker format Anders Molin11-Sep-01 1:28 Anders Molin 11-Sep-01 1:28  What's the problem? After 23:59 comes 00:00. I have never ever seen anything showing the clock as 24:00, its always 00:00 or 0:00. - Anders Money talks, but all mine ever says is "Goodbye!" Re: CDTPicker format markkuk11-Sep-01 2:18 markkuk 11-Sep-01 2:18  24:00 is a valid time according to ISO 8601. 24:00 on day N == 00:00 on day N+1. The seconds field should be able to show values 00-60 bacause of leap seconds. See here for more information. Re: CDTPicker format Anders Molin11-Sep-01 2:30 Anders Molin 11-Sep-01 2:30  24:00 is a valid time according to ISO 8601. It seems like you are right about that. But, you would only show 24:00:00 for a single second, then it would shift to 00:00:01. And leap seconds... How often do you need one of those in a timepicker? - Anders Money talks, but all mine ever says is "Goodbye!" Re: CDTPicker format 11-Sep-01 15:30 11-Sep-01 15:30  >How often do you need one of those in a timepicker? For my purposes I just need to be able to enter a time into a database for any given day, and I have to be able to input from 00:00 all the way to 24:00 for that day. So yes, if I can get the timepicker to read 24:00:00 then that will be just fine. The problem is how? I can't find any way to go past 23:59 right now. Regards, john How can I add a method to all controls? tfElep10-Sep-01 23:24 tfElep 10-Sep-01 23:24  I'd like that all common controls such as CEdit and CButton have a specific function. But it is not implemented in the CWnd class. How can it be derived by the children of CWnd? Or is there any way else to solve this problem without changing code of MFC? Tiny Flying Elephant I love flying... Re: How can I add a method to all controls? Tomasz Sowinski10-Sep-01 23:42 Tomasz Sowinski 10-Sep-01 23:42  Please be more specific. What do you want to achieve with this special function? Tomasz Sowinski -- http://www.shooltz.com How to recompile MFC source tfElep10-Sep-01 21:37 tfElep 10-Sep-01 21:37  I'd like to make a little modification on the MFC source provided in directory "\Program Files\Microsoft Visual Studio\VC98\MFC\SRC", but I just don't know how to let the modified code take effect. Tiny Flying Elephant I love flying... Re: How to recompile MFC source Christian Graus10-Sep-01 21:44 Christian Graus 10-Sep-01 21:44  Might I suggest this is a hugely BAD idea ? I'm not sure if it can be done, but if you do it, you'll create code incompatible with MFC42.dll ( you'll need to statically link ) AND incompatible with every other development machine on the planet. Why not derive from the MFC class you want to change and make the change in your derived class ? That's what it is for. 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. Unicode text through SetWindowText functin Ivan A Eryshov10-Sep-01 21:36 Ivan A Eryshov 10-Sep-01 21:36  When I use unicode in my CRichEditView based class I can input Unicode characters only from keyboard, and when I try input its by function SetWindowText every character, which takes code after FF, printing as two different character, how I can correct this. Linking error when using template class from MFC Extension DLL D.D. de Kerf10-Sep-01 21:33 D.D. de Kerf 10-Sep-01 21:33  Hi, I'm exporting a template class from my MFC extension DLL, but as soon as I start using the template class outside the DLL, I get linker errors. The template class in the DLL looks like this (myClass_Object is also defined inside the DLL): template <class afx_ext_class="" caggregate=""> class AFX_EXT_CLASS myClass_Aggregate : public myClass_Object { public: myClass_Aggregate() { .... } ... } I use the aggregate with a class from inside the DLL as the template class and the linker error looks like this (myClass_TreeFileNode is a subclass of myClass_Object): DumpDB.obj : error LNK2001: unresolved external symbol "public: int __thiscall myClass_Aggregate<class myclass_treefilenode="">::IsEmpty(void)const " (?IsEmpty@?$myClass_Aggregate@VmyClass_TreeFileNode@@@@QBEHXZ) Am I not exporting the class correctly?? Dave Structured programming vs. chaotic mind boggling

Last Visit: 31-Dec-99 18:00     Last Update: 1-Jul-24 3:55 Refresh ᐊ Prev1...17999180001800118002180031800418005180061800718008 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.