Re: Two functions send arguments to a single function. - C / C++ / MFC Discussion Boards

Re: Problem with 'Delete' key.

David Crow23-Jan-08 2:50

David Crow

23-Jan-08 2:50

Sanjeeva Kumar K wrote:
I think i have not written code for handling the delete key event.

But did you not earlier state that, "If i select some text and if i press 'Delete' button then my tool is deleting the selected text."?

In your deletion code, are you first checking to see if any text is selected?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Problem with 'Delete' key.

Sanjay K23-Jan-08 17:03

Sanjay K

23-Jan-08 17:03

I have written code for deleting characters only if some text is selected.
If i simply press the 'Delete' button then this function is not invoked.
do i need to handle it separately ???

Regards,
Sanjeeva Kumar.

Re: Problem with 'Delete' key.

David Crow24-Jan-08 2:40

David Crow

24-Jan-08 2:40

Sanjeeva Kumar K wrote:
do i need to handle it separately ???

I would think so.

Re: Problem with 'Delete' key.

Nitheesh George23-Jan-08 17:24

Nitheesh George

23-Jan-08 17:24

I think u don't need to override the WM_KEYDOWN message. it will all happen automatically.

or if u need to override for some reason then call base implementation in overridden function

eg: If you are using the CEdit then you need to call the CEdit::OnKeyDown in ON_WM_KEYDOWN Message Handler function. Or if you are using a Win32 then u need call the Old Window procedure in your own window proc. i mean leave the deleting to the default message handler. that's it.

BEGIN_MESSAGE_MAP(CMyEdit, CEdit)
ON_WM_KEYDOWN(OnMyEditeyDown)
END_MESSAGE_MAP()

void CMyEdit::OnMyEditeyDown( UINT nChar,
UINT nRepCnt,
UINT nFlags )
{
CEdit::OnKeyDown(nChar,nRepCnt,nFlags);
// to Do

}

i think this will help you

Re: Problem with 'Delete' key.

Sanjay K24-Jan-08 4:31

Sanjay K

24-Jan-08 4:31

Thanks Nitheesh. I will try this.

Two functions send arguments to a single function.

CodingLover22-Jan-08 23:27

CodingLover

22-Jan-08 23:27

Hi all,

For a long time I'm worried about this and still don't found the correct way.

Say I have a function as follows.

void addData(string name, char gender)
{
// Do the processing
}

But I can't send name and gender to addData() function within a single function. One function find the name and another function find the gender.

void getName()
{
// Find the name here
}

void getGender()
{
// Find the gender here
}

How can I send those values to the addData() function using two functions as shown above.

I appreciate your help all the time...
Eranga Smile | :)

Re: Two functions send arguments to a single function.

Rajesh R Subramanian22-Jan-08 23:38

Rajesh R Subramanian

22-Jan-08 23:38

You cannot have two different functions send one argument each to a function that accepts two arguments. I really don't understand your problem clearly though.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: Two functions send arguments to a single function.

CPallini22-Jan-08 23:43

CPallini

22-Jan-08 23:43

what about:

void getName( string & name)
{
//  name = whatever;
}
char getGender()
{
 // return 'F'; 
 // or (as appropriate)
 // return = 'M';
}

and then

string name;
char gender;
getName(name);
gender = getGender();
addData(name, gender);

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Re: Two functions send arguments to a single function.

CodingLover23-Jan-08 0:24

CodingLover

23-Jan-08 0:24

CPallini wrote:
string name;
char gender;
getName(name);

I'm not clear this code. I mean that looking to find the name using getName() function. Frown | :(

I appreciate your help all the time...
Eranga Smile | :)

Re: Two functions send arguments to a single function.

CPallini23-Jan-08 0:43

CPallini

23-Jan-08 0:43

Eranga Thennakoon wrote:
I'm not clear this code. I mean that looking to find the name using getName() function.

It assigns the found name to the passed parameter.

Could you please post your actual getName code?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Re: Two functions send arguments to a single function.

Rajesh R Subramanian23-Jan-08 0:50

Rajesh R Subramanian

23-Jan-08 0:50

You actually understood his query? Man you're too good. Big Grin | :-D

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: Two functions send arguments to a single function.

CPallini23-Jan-08 0:57

CPallini

23-Jan-08 0:57

Rajesh R Subramanian wrote:
You actually understood his query?

I try my best guessing about.
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Re: Two functions send arguments to a single function.

Rajesh R Subramanian23-Jan-08 1:05

Rajesh R Subramanian

23-Jan-08 1:05

CPallini wrote:
I try my best guessing about.

I got that now.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: Two functions send arguments to a single function.

David Crow23-Jan-08 2:48

David Crow

23-Jan-08 2:48

Eranga Thennakoon wrote:

How can I send those values to the addData() function using two functions as shown above.

You can't. The two functions you've shown have no way of sending data back to the caller. If you are allowed to change them, something like:

string getName( void )
{
}
 
char getGender( void )
{
}
...
addData(getName(), getGender());

might work.

Menu bar problem

trioum22-Jan-08 22:58

trioum

22-Jan-08 22:58

how to show Menubar on the DialogBOX resource and use it
in both plain sdk or MFC

Trioum

Re: Menu bar problem

KarstenK23-Jan-08 1:16

KarstenK

23-Jan-08 1:16

SetMenu( HMENU ) works.

Greetings from Germany

Re: Menu bar problem

Nitheesh George23-Jan-08 23:05

Nitheesh George

23-Jan-08 23:05

Use LoadMenu API or CMenu::LoadMenu

then use SetMenu API or CMenu::SetMenu

ATL CImage class issue

Antonyemac22-Jan-08 22:30

Antonyemac

22-Jan-08 22:30

how can use ATL CImage class with out using MFC (with plain win 32API).
whether I have to ship any dll (or .net frame work)with my project binary . I am using visual studio 2005 with unmanaged c++

Re: ATL CImage class issue

Mark Salsbery23-Jan-08 6:42

Mark Salsbery

23-Jan-08 6:42

The documentation can help....

check the note and requirements section at the bottom of the docs
for the CImage Class[^].

For the C runtime without MFC, see Programming with ATL and C Run-Time Code[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

how to save a file?

gentleguy22-Jan-08 22:27

gentleguy

22-Jan-08 22:27

dear all

if now i have a array which contains 10 values, for example, kelly[10],how to save this array as a txt file or other extension file. thanks

Li Zhiyuan

5/10/2006

Re: how to save a file?

CPallini22-Jan-08 22:58

CPallini

22-Jan-08 22:58

You may use:
(1) a text format for a human readable file.
(2) a binary format for later retrieval of array values.

Regarding the API, you have a lot of options: the std::ofstream class methods or standard C functions (fopen, fwrite, fclose), the Win32 API (like CreateFile, WriteFile, CloseHandle functions) or the MFC classes (like CFile, CStdioFile), ...

Moreover, I think it is time (considering all your previous posts) to have a look at MFC serialization [^] topic.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Re: how to save a file?

gentleguy23-Jan-08 1:32

gentleguy

23-Jan-08 1:32

dear friend

how to understand the following code:

ofs.write( (char*)&count, sizeof(count));that means char*;

how to save using std::ofstream? thanks a lot,...urgent..

second question is that can you provide me the stuff: for example: %d,if%, and so forth..i read them before, but so far i couldn't find these matierials, thanks a lot.

Li Zhiyuan

5/10/2006

Re: how to save a file?

CPallini23-Jan-08 2:10

CPallini

23-Jan-08 2:10

To write some data to the file, the ostream object needs to know
(1) the address of the data.
(2) the size of the data.

(1) Well, &count means exactly the address of the variable count (as int pointer) and (char *) is a cast of the int pointer to a char one (ostream works on byte basis and it requires a char pointer, a char is 1-byte long, after all...).
(2) sizeof(count) is the size of count, i.e. the size of an integer variable (i.e. 4 bytes).

li zhiyuan wrote:
second question is that can you provide me the stuff: for example: %d,if%, and so forth

%d, %f are format specifiers for the printf (as well for fprintf, fscanf functions): whenever you need to print a particular type using such function(s) then you have to use the proper format specifier, for instance

int i= 100;
float f = 3.14159;
printf("An integer, i=%d, a float f=%f\n", i, f);

Full documentation can be found here http://msdn2.microsoft.com/en-us/library/hf4y5e3w(VS.71).aspx[^]
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Re: how to save a file?

gentleguy23-Jan-08 2:16

gentleguy

23-Jan-08 2:16

dear friend

thank u very much.

how to create 10 3x4 arrays, late when i wanna use anyone of them, i can invoke it, i tried two days already, could not solve this problem,..really urgent now...thanks a lot..

how can i find full explanation of format specifier: &d,%1f........i need to read recall them..forgot it already..thanks a lot

Li Zhiyuan

5/10/2006

Re: how to save a file?

CPallini23-Jan-08 2:20

CPallini

23-Jan-08 2:20

Actually, in a previous reply, I showed exactly all the necessary steps, using ofstream and ifstream, to perform the task on a simple array. I think you can easily figure out how to extend the posted code to fulfill your needs.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

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