Re: Only Numeric value in Edit Box - C / C++ / MFC Discussion Boards

Re: Make each cell in a CListCtrl a little bigger

anderslundsgard5-Dec-04 23:41

5-Dec-04 23:41

Tnx for help. I'll try to find some artickles about custom draw.

_____________________________

...and justice for all

APe

How I can stop an USB-drive from my application?

Rolf Faßler2-Dec-04 23:20

Rolf Faßler

2-Dec-04 23:20

Hi, i have the following problem:
In my application (.NET) the user can plug in an USB-drive and the software starts with a download from this drive automatically. After downloading I will stop this USB-drive, so that the user can pull out the USB-drive immediately.

Please help me!
Thanks!
Rolf

How to put tables into RichEdit

Lee Seung Ic2-Dec-04 21:43

Lee Seung Ic

2-Dec-04 21:43

Hi~~~~ guys

I really want to know how to make a table editor
I am tring to use RichEditCtrl in order to insert tables in editor program, but I really don't know about that. I have no idea about that!
I am goint to die!!!!!!!
please tell me your advise

have a nice day
cheers~~~~~~
^____________^

how to change

vc-programmer-2-Dec-04 20:51

vc-programmer-

2-Dec-04 20:51

now,i'm writing mdi application.
my demo application using tab control.(not mdi tab)
tab control create with static control for display image.

When i start run demo,images is load.
next, i want to change another image while demo is running.

following code i using ....it is not ok..
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void CMyView::OnApply()
{
CMy_TabDlg *dlg = new CMy_TabDlg;
if (!dlg->Create(IDD_My_DLG, this))
return;
else
dlg->Load_samplephoto("image/none.bmp");
}

Problem linkage

JensB2-Dec-04 20:25

JensB

2-Dec-04 20:25

Hi,

I seem to have a problem with linking an MFC application.
I get the following errors:
error LNK2001: unresolved external symbol __imp__floor
error LNK2001: unresolved external symbol __imp__atof
error LNK2001: unresolved external symbol __imp__atof

Am i forgetting a library to link with or what could cause this problem?

Best regards,
Jens

Re: Problem linkage

Nish Nishant2-Dec-04 20:50

Nish Nishant

2-Dec-04 20:50

Make sure that both your main project and the library you are using are compiled with the same CRT linkage options (multithreaded, singlethreaded, static, dll etc)

My blog on C++/CLI, MFC/Win32, .NET - void Nish(char* szBlog);
My MVP tips, tricks and essays web site - www.voidnish.com

Only Numeric value in Edit Box

zahid_ash2-Dec-04 19:42

zahid_ash

2-Dec-04 19:42

HI
How can I enter only numeric value in Edit Box
I checked its Property Numeric , but i cannot allow
value with decimal like 34.45

i not want to enter alphabets characters in it , how can i handle or do it

thanx

Regards.

Re: Only Numeric value in Edit Box

Vikram Kashyap2-Dec-04 19:51

Vikram Kashyap

2-Dec-04 19:51

Hi,

You run a loop and check the ASCII value of the charter entered into that edit box. If the value is falling between 97 - 122 (means user is trying to enter some alphabets using lower case), if the value is falling between 65 - 90 (means user is trying to enter some alphabets using upper case). Here you can give the appropriate message.

Bye....

Roll eyes | :rolleyes:

Re: Only Numeric value in Edit Box ( Where i catch the key press event )

zahid_ash2-Dec-04 20:43

zahid_ash

2-Dec-04 20:43

I got the idea from your reply thanx

I want to check the ASCII value as i press key from key board that is it
a vlid key pressed .

Where can i catch / check that key pressed event fired on Edit Box .

thanx

Regards.

Re: Only Numeric value in Edit Box

Nish Nishant2-Dec-04 20:45

Nish Nishant

2-Dec-04 20:45

First set the ES_NUMBER style so that only numbers and . can be entered. Then handle EN_UPDATE, use GetWindowText to get the edit box text, search for a . and if a . is found, remove the . and call SetWindowText.

Nish

My blog on C++/CLI, MFC/Win32, .NET - void Nish(char* szBlog);
My MVP tips, tricks and essays web site - www.voidnish.com

Re: Only Numeric value in Edit Box

zahid_ash2-Dec-04 21:01

zahid_ash

2-Dec-04 21:01

Hi,

I tried this but it not taking (.) Decimal ( point)

I want Decimal (point) there (.)

as 344.455 ;

but ES_NUMBER is entering it 344455;

waintg for reply
thanx

Regards.

Re: Only Numeric value in Edit Box

Nish Nishant2-Dec-04 21:26

Nish Nishant

2-Dec-04 21:26

Oops, sorry - my mistake. I assumed ES_NUMBER allows . too and you wanted the . to be disallowed Sigh | :sigh:

Do the same steps as I mentioned in the first post - except don't use the ES_NUMBER style. Now check the entered text in the EN_UPDATE handler and remove all characters other than numbers and .

Nish

My blog on C++/CLI, MFC/Win32, .NET - void Nish(char* szBlog);
My MVP tips, tricks and essays web site - www.voidnish.com

Re: Only Numeric value in Edit Box

Vikram Kashyap2-Dec-04 21:54

Vikram Kashyap

2-Dec-04 21:54

hi..

You need to derive a new class using CEdit as the base class. There you can code either OnKeydown() or OnChar(, or PreTranslateMessage() message to suit your needs.

For PreTranslateMessage() here is the code...Hope it'll help you

BOOL CMyEdit::PreTranslateMessage(MSG* pMsg)
{
if(pMsg->message == WM_KEYDOWN )
{
int nVirtKey = (int) pMsg->wParam;
if(nVirtKey >= 97 && nVirtKey <= 122) //For Lower Case
{
MessageBox("Cannot enter alphabets");
}

if(nVirtKey >= 65 && nVirtKey <= 90) //For Upper Case
{
MessageBox("Cannot enter alphabets");
}
}
return CEdit::PreTranslateMessage(pMsg);
}

Bye...

Roll eyes | :rolleyes:

Vikram Kashyap
"You will never fail until you stop trying"

Re: Only Numeric value in Edit Box

David Crow3-Dec-04 2:18

David Crow

3-Dec-04 2:18

Use a masked edit control.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Help me...

dSolariuM2-Dec-04 19:32

dSolariuM

2-Dec-04 19:32

Hello everyone.
When I release my mfc app. and I want to
Use this exe file in a Windows that haven't
Visual Studio Installed on it this file
give me an error there isn't a file to run...
Please help me on this.
Best Regards.
Thanks.

Re: Help me...

Vikram Kashyap2-Dec-04 19:55

Vikram Kashyap

2-Dec-04 19:55

Hi...

I think you probably need to ship the supporting DLL's also required by your application. Check the Dll name that is appearing in the message box when u try to execute the application.

Bye...

Vikram Kashyap
"You will never fail until you stop trying"

Re: Help me...

david_gilmour2-Dec-04 21:07

david_gilmour

2-Dec-04 21:07

Hi!
You have dependency walker in the visual studio tools programs> Microsoft Visual Studio > Microsoft Visual Studio Tools > Depends

Run this, Select File > Open and select your application exe, it will give you a list of dlls your application needs for running. ship all those dlls

Between the great things we cannot do and the small things we will not do, the danger is that we shall do nothing

Re: Help me...

David Crow3-Dec-04 2:20

David Crow

3-Dec-04 2:20

You failed to mention the exact error, but have you compiled it in debug mode instead of release mode?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

messagebox problem

tiziacaia2-Dec-04 18:41

tiziacaia

2-Dec-04 18:41

I open a MessageBox from a dialog "mydialog". When i push the ok button on the MessageBox mydialog be closed but i don't want that.
How can i let open mydialg?

thanks a lot

Re: messagebox problem

Nish Nishant2-Dec-04 19:27

Nish Nishant

2-Dec-04 19:27

Post the relevant code where you bring up the messagebox.

Nish

My blog on C++/CLI, MFC/Win32, .NET - void Nish(char* szBlog);
My MVP tips, tricks and essays web site - www.voidnish.com

Re: messagebox problem

tiziacaia3-Dec-04 5:45

tiziacaia

3-Dec-04 5:45

void CFatture::message(HWND wnd,CString str,int type)
{
if(type==0){
MessageBox(NULL,str,"Info",MB_OK|MB_ICONINFORMATION);
}else{ MessageBox(NULL,str,"Errore",MB_OK|MB_ICONEXCLAMATION);
}
}

and i call this message function with (for example)
theApp.message(NULL,e->Message,1);
from class off "mydialog"

Re: messagebox problem

V.2-Dec-04 23:15

2-Dec-04 23:15

Sorry, i read wrong, my mistake D'Oh! | :doh:

~~I think you should override the OnOK function of the dialog, do not call CDialog::OnOK() in it.~~
good luck.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: How much overhead does std::vector have?

John R. Shaw2-Dec-04 18:30

John R. Shaw

2-Dec-04 18:30

Compared to your data set, practicaly none and you'll need every bit of that. In Widows x64 it will depend on the compiler you are using, if you are still using a compiler for x32 then it will add no additional overhead. If you change to a compler for x64 then all your int variable sizes will become 64 bit variables (doubles your sets memory size and should double the amount of data vector can handle).

If you don't use vector (or possibly CArray), then you will have to write your own code to handle the array and that may add more overhead than using vector.

The actual overhead in bytes depends on what functions you need to call. When a C++ compiler generates code (well VC6 anyway), I beleive it does not generate code (for templates) that does not get called (a little built in optimization).

If you where writing it in standard C, you would normaly get every function in every staticaly linked library include in your program, whether you called them or not.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: How much overhead does std::vector have?

Tim Smith3-Dec-04 4:31

Tim Smith

3-Dec-04 4:31

It really depends on how you are using std::vector. If you don't use reserve and then just push_back each entry, then the vector will grow using a simple doubling algorithm.

For example, push_pack one item and the new size is 1 elements used, 1 element allocated (1U/1A). If you push back another, vector needs to resize the memory so it doubles the size resulting in 2U/2A. On the next push_back it doubles again resulting in 3U/4A. Next push back doesn't require a reallocate, 4U/4A. The next one doubles again, 5U/8A.

Now, given you need to store 100,000,000, the doubling algorithm would result in 134,217,728 elements allocated. This is a waste of a lot of memory.

But that is only half the problem. Everytime that memory is reallocated, it runs the risk of fragmenting your memory. When you are talking about a few KB here and there, it isn't a problem. When you start talking about MB blocks of memory, you will end up with a lot of "free" memory that was once allocated but isn't being used since the bigger allocation can't fit into that block. So you could easily be wasting another 400MB of memory.

BUT, this isn't a problem with vector, it would be a problem with how you are using it. Use reserve to pre-allocate the vector size. Once that is done, what the other guy said would be true.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: How much overhead does std::vector have?

Robert Buldoc3-Dec-04 6:55

Robert Buldoc

3-Dec-04 6:55

Thank you for the information, it has been the most helpful.

I use this array to sort data in for stress testing memory. So I needed to know the exact size of memory used. I should write a custom made class Smile | :)

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