Re: CStdIOFile ???? - C / C++ / MFC Discussion Boards

Copying bmp images from one RichEdit Control

verma-rahul27-Dec-04 5:07

27-Dec-04 5:07

I want to copy the text as well as image bmp to be copied and to another RichEdit Control from one RichEdit Control on button pressed .The text data is going but image is not going.
pls help me

Learner always

c++ calculus functions

Member 161036127-Dec-04 4:48

Member 1610361

27-Dec-04 4:48

how can i create calculus functions using c++

Re: c++ calculus functions

Maximilien27-Dec-04 5:02

Maximilien

27-Dec-04 5:02

simple answer : yes.

There are no build-in calculus functions in C++.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: c++ calculus functions

John R. Shaw27-Dec-04 6:28

John R. Shaw

27-Dec-04 6:28

Book:
NUMBERICAL RECIPES in C Th Art of Scientific Computing
Cambridge University Press
ISBN 0-521-35465-X

Is probably they place to start if you plan on writing your own; Otherwise you'll need to find and purchase a library (recommended).

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

CStdIOFile ????

Shay Harel27-Dec-04 4:24

Shay Harel

27-Dec-04 4:24

Hi,

I need to open a file and appened to it later, from some reason, it get's overwritten, here is the most simple code....

<br />
<br />
CStdioFile log_file (_T("file.txt"),CFile::modeWrite |CFile::modeCreate |CFile::typeText);<br />
log_file.WriteString("123\n");<br />
///do something.......<br />
<br />
CStdioFile log_file (_T("file.txt"),CFile::modeWrite |CFile::typeText |CFile::modeNoTruncate);<br />
<br />
log_file.WriteString("456\n");<br />

end result in the file is always "456".

Why????

Re: CStdIOFile ????

4apai27-Dec-04 5:39

4apai

27-Dec-04 5:39

try to use retrived handle in fopen function with a+ flag instead of recalling constructor

4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.

Re: CStdIOFile ????

Shay Harel27-Dec-04 5:42

Shay Harel

27-Dec-04 5:42

I don't want to use fopen etc....
The reason why I started using CStdioFile is because Visual Studio .NET did not support the <fstream.h> anymore

Re: CStdIOFile ????

4apai27-Dec-04 5:45

4apai

27-Dec-04 5:45

use CreateFile!?
it always help me with)

4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.

Re: CStdIOFile ????

Wes Aday27-Dec-04 8:53

Wes Aday

27-Dec-04 8:53

CFile::modeNoTruncate Combine this value with modeCreate. If the file being created already exists, it is not truncated to 0 length. Thus the file is guaranteed to open, either as a newly created file or as an existing file

Artificial intelligence is no match for natural
stupidity.

Re: CStdIOFile ????

Shay Harel27-Dec-04 8:55

Shay Harel

27-Dec-04 8:55

So....
You suggest to change the second time I open the file to:

<br />
CStdioFile log_file (_T("file.txt"),CFile::modeWrite |CFile::typeText ||CFile::modeCreate |CFile::modeNoTruncate);<br />

I already tried that, just like the the microsoft site say, still no change, this is crazy, I know.....

Re: CStdIOFile ????

Wes Aday27-Dec-04 9:00

Wes Aday

27-Dec-04 9:00

Ah yes... stupid of me... you have to SeekToEnd() before you write again

Artificial intelligence is no match for natural
stupidity.

Re: CStdIOFile ????

Tom Wright27-Dec-04 8:54

Tom Wright

27-Dec-04 8:54

Here's whay I do and it works everytime.

<br />
       	CStdioFile myFile;<br />
	myFile.Open (FileName, CFile::modeCreate |                 CFile::modeReadWrite | CFile::modeNoTruncate, NULL);<br />
	myFile.SeekToEnd();<br />
	myFile.WriteString (strLSbuf);<br />
	myFile.Close ();<br />

I think the problem you are running into is that you are not first placing the cursor to the end of the line then writing out your string.

So when you do an open on the file, the cursor is placed at the beginning of the line and you overwrite your existing data.

Hope this help

Tom Wright
tawright915@yahoo.com

Re: CStdIOFile ????

Shay Harel27-Dec-04 9:00

Shay Harel

27-Dec-04 9:00

AAAAAnnnndddddd.... we have a winner !!!

Thanks a lot.

When I worked with ofstream, and use the ios::app flag it was done by default I guess.

Have a great day.

About MAP

LiYS27-Dec-04 4:02

LiYS

27-Dec-04 4:02

Hi all:
I have the declaration like this:
CString strTM
std::map<int, std::string> TMMap;
TMMap[0] = "Readed";
But when I　access through the key value like this
strTM= TMMap[0];

the compiler give me a error Message like this
"binary '=' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char="">"

Why? How can I fix this problem. Smile | :)

How Can I Draw Inside a Edit Ctrl?

SivaramanDhamodharan27-Dec-04 1:17

SivaramanDhamodharan

27-Dec-04 1:17

Hi All,

I have a Dialog with a text box. I want to draw some drawing in the Editbox using GDI D'Oh! | :doh:

( Say simple lines using LineTo() and MoveTo() ). Can anyone help me what should i do for that.

Thanks in Advance.

Re: How Can I Draw Inside a Edit Ctrl?

Azghar Hussain27-Dec-04 4:21

Azghar Hussain

27-Dec-04 4:21

1)You can derive a class from CEdit and Handle OnPaint(). You will have dc their. YOu can use it to draw like dc.MoveTo() - dc.LineTo().

2)Or you can call CDC* pDC = CEdit.GetDC();
pDC->MoveTo(), pDC->LineTo().

If you have faith in the cause and
the means and in God, the hot
Sun will be cool for you.

Re: How Can I Draw Inside a Edit Ctrl?

SivaramanDhamodharan27-Dec-04 18:18

SivaramanDhamodharan

27-Dec-04 18:18

DELIVER THE PROMISE wrote:
Or you can call CDC* pDC = CEdit.GetDC();
pDC->MoveTo(), pDC->LineTo().

Thanks man Smile | :)

. That is easy to follow and working. Big Grin | :-D

How to find a Active or Highlighted or Default Button in a given Window

sureei26-Dec-04 23:51

sureei

26-Dec-04 23:51

Hi,
Pls guide me the way to find a Active or Highlighted or Default Button in a given Window.
Or atleast need to enumerate all controls/buttons in a given window Confused | :confused:

.

Thks,
Sureei

Re: How to find a Active or Highlighted or Default Button in a given Window

ThatsAlok27-Dec-04 1:08

ThatsAlok

27-Dec-04 1:08

use this Api

For Enumerating Child Windows

FindWindowEx

"I Think this Will Help"
Alok Gupta
visit me at http://www.thisisalok.tk

Case of Characters (PreTranslateMessage)

Grahamfff26-Dec-04 23:40

Grahamfff

26-Dec-04 23:40

Usintg the PreTranslateMessage to obtain and process keyboard input but all the normal keys I process seem to be upper case (e.g. pMsg->wParam, seem to be ASCII upper case) even when I change the Caps Lock.

ARe they a flag that controls the case?

grahamfff

Re: Case of Characters (PreTranslateMessage)

Neville Franks27-Dec-04 10:24

Neville Franks

27-Dec-04 10:24

There are no such things as lower case keys on the keyboard. All keys are defined by a VK_xx value eg. VK_A thru VK_Z for A-Z. See winuser.h

To handle character case you need to check if the Shift Key is down or Caps Lock is on. For the shift key use:

if ( GetKeyState( VK_SHIFT ) & 0x8000 )
    ...;

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Windows Server 2003 DDK

RedDragon2k26-Dec-04 23:28

RedDragon2k

26-Dec-04 23:28

Hi Guys

anyone have a clue where i can download the ddk with out being a msdn subscriber(too expensive for a student) and not paying 25 $ for shipping. Please help. I'm working on a kernel mode driver, but for this i need the DDK.

MFG
RedDragon2kx

Unix and C are the ultimate computer viruses.

Iterate through controls on Dialog Box

Mandar D. Sahasrabuddhe26-Dec-04 22:58

Mandar D. Sahasrabuddhe

26-Dec-04 22:58

Hi,

I am doing GUI programming using Win32 SDK (no MFC). I have a dialog box with 2 text fields, 2 static (labels) and 2 buttons. I wish resize the dialolg box and move / resize the 6 controls on it. Can anyone suggest how to get handles to all the 6 child windows to do SetWindowPos for each?

I have tried using GetWindow with GW_CHILD and GW_HWNDNEXT. However I can get only the text boxes on the dialog box. Moreover, I have noticed that the while loop to enumerate child windows goes into infinite loop.

Please suggest some solution.

Re: Iterate through controls on Dialog Box

4apai27-Dec-04 5:53

4apai

27-Dec-04 5:53

if u have command identifiers of each control you can use GetDlgItem to get handle.
if u dont - then enumarate windows using FindWindow+FindWindowEx

4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.

Re: Iterate through controls on Dialog Box

User 665827-Dec-04 6:38

User 6658

27-Dec-04 6:38

What about EnumWindows and EnumChildWindows?

regards

modified 12-Sep-18 21:01pm.

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