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to develop a console program to draw lines, circles, etc.,
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a console application can only achieve graphics in the most rudimentary way.
Historically, in the DOS days, most of us resorted to using the upper OEM character set or drawing very crude primitives like circles and images by arranging characters in the 80x25 character matrix so they resembled something.
It was hardly adequate and mostly wasteful except for the user interfaces that were early examples of the modern day user interface, particularly menus, scrollbars, and dialogs. Products as Turbo C++ and tools like "edit" were examples of good utilizations of these "graphics" techniques.
If you are in search of how to create a graphics application using C++/MFC then I would recommend starting a new doc/view application in Visual C++ and deriving the view class from CView or CScrollView and experimenting with placing some drawing primitives like line, circles, and rectangles in the CYourDerivedView::OnDraw() method.
In MSDN, look up "MoveTo" and "LineTo" for lines, "Rectangle" for a basic rectangle, and "Ellipse" for ellipses and circles.
After you see how these work, you will want to research "Mapping Modes" for scaling, Pens and Brushes to get different drawing effects, then move on to text by looking up "DrawText".
Hope that helps get you started.
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Can you more exaplain about your question "create graphics program "
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hi,
what is better (faster), if i read some information from the database each time i need it? or if i read all the information i need and stock them into an array in the ram and close the connection to the Db. and so i access only that array if it necessary.
thx
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Well if the database is located on disk then disk access is alot slower than RAM access, but if th database is located in memory then it's related to the type of database and such details...etc.
Hope this helps
To follow the path, Walk with the MASTER, See through the MASTER, Be the MASTER!
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thank you for the answer, the database is located on disk, and its a ms access database
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Then it becomes a matter of which is faster: milliseconds or nanoseconds?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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You are right but when it comes to tons of information and data, the difference will be seconds to even minutes!
To follow the path, Walk with the MASTER, See through the MASTER, Be the MASTER!
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Mohamad K Ayash wrote: ...the difference will be seconds to even minutes!
Doubtful.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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i want to generate random string, how we can do it in VC++(MFC)? can anybody help me plz,
Thanks & Regards,
Anay Kulkarni
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You can use of random chars with rand function on the range of ASCII codes then you must fill an char array on a loop.
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You could generate a GUID - see this[^] article.
/ravi
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AnayKulkarni wrote: i want to generate random string...
You can't. You can, however, use rand() to generate pseudo-random sequences of characters.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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how to upload a text file on server using "PutFile" function of CFtpConnection class, i am using following syntax but it is not working-
CFtpConnection *m_pFtpConnection;
CInternetSession oSession;
m_pFtpConnection = oSession.GetFtpConnection("ftp site name",
"username","password",INTERNET_INVALID_PORT_NUMBER);
BOOL bText = m_pFtpConnection->PutFile("test.txt",
strServerLocation,FTP_TRANSFER_TYPE_BINARY,1);
can anybody plz tell how to do it?
Thanks & Regards,
Anay Kulkarni
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use GetLastError() API to find out the exact reason for the failure.
Do your Duty and Don't expect the Result
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What was return value of PutFile?
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try a passive connection.
m_pFtpConnection = oSession.GetFtpConnection("ftp site name","username","password",INTERNET_INVALID_PORT_NUMBER, TRUE);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</A>
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HELLO,
We have tried creating singleton class. the code is as follows
class singleton
{
private:
static singleton * single;
singleton()
{
}
public:
static singleton* getinstance();
};
singleton* singleton :: getinstance()
{
if(NULL==single)
single = new singleton();
return single;
}
main()
{
singleton *obj_singelton;
obj_singleton = singleton::getinstance();
}
for this we are getting the following linker error
undefined symbol singleton::single.
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Shraddha Gautam wrote: for this we are getting the following linker error
undefined symbol singleton::single
You have to initialize the static member outside the class declaration as,
singleton* singleton::single = NULL;
And if your application is multithreaded then you have to use some locking mechanism or if you sure that this singleton instance will be needed from the application start time then modify the initilization as,
singleton* singleton::single = new singleton;
Do your Duty and Don't expect the Result
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Thanks.
We tried using that but it is creating two objects. Our application is not a multithreading.plz let know what has to be done.
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I need your help.
I am developping one application in VC++6.0 using MFC. The
Main Frame Window is divided into 2 using CreateStatic
function of CSplitterWnd Class , upon one of which a
Runtime Class namely CErrMsgView (Base Class CScrollView)
is being attched. The other one, ( is again sub-divided
into 2 with CreateStatic. Again it is being attached with
2 Run Time classes namely CMainView and CStatView (Base
Class CFormView) respectively.
The CErrMsgView Class is meant to capture all the Messages
being transferred to and fro. I would like to add an
option under the View Menu Heading "Show/Hide ErrMsg
View". The Clck on which alternately Show or hide the
ErrMsgView. Would You Please Help Me Out.
Atleast give some Hints. Whether SetCheck will do the
required function/ But How? How can I Use Set Check on a
Splitter Window Class Member? Neither ShowWindow() or
GetStyle '&' - ing with WS_VISIBLE and assigning with '0'
is not possible here as with Cwnd Class?
Please do show me the way of implementation.
Thank You and Best Regards.
Soumen Biswas
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A resizing docking control bar would be more direct and to the point and possibly easier to maintain as your project grows than splitter windows. At least if you desire the ability to change where it's docked and hiding/showing and even detaching it and floating it.
Resizeable docking control bar[^]
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Indeed it's a nice tool in VC++. Thanks to bob16972 for providing me the link info. I've utilised the suggestions in getting a dockable bar in my application. But I could not able to implement the to and fro Error Message passing both from Transmit and Receive ends.
I am developping one application in VC++ ver-6.0 using MFC. The Main Frame Window is divided into 2 using CreateStatic function of CSplitterWnd Class , upon one of which a Runtime Class namely CErrMsgView (Base Class CScrollView) is being attched. The other one, ( is again sub-divided into 2 with CreateStatic. Again it is being attached with 2 Run Time classes namely CMainView and CStatView (Base Class CFormView) respectively.
The CErrMsgView Class is meant to capture all the Messages being transferred to and fro. I would like to add an option under the View Menu Heading "Show/Hide ErrMsg View". The Clck on which alternately Show or hide the ErrMsgView. Would You Please Help Me Out.
.
Initially in my application, I have used a Run Time Class ClogView derived from CScrollView and mapped to one SplitterWindow in CMainFrame control all the messaging in my application.
Can You Please tell me how to map the MyBar docked control bar to use as a error message viewer.
Thank You and Best Regards.
Soumen Biswas
Soumen Biswas.
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I have a iPod player.
It use MPEG-4 standard video files.I know the files should be code using ACC audio,xvid video standard.
I want to read the files's infomation.
Somebody would like to tell me how to do such work or give me a guide?
Thanks.
GOOD LUCK
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Did you try with MCI functions Im not sure they workwith Mpeg-4 or no.
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