Re: Getting the rect of the text in a Static - C / C++ / MFC Discussion Boards

valikac28-Jun-03 9:37

28-Jun-03 9:37

Okay. Here is an example of a two-dimensional array of char using dynamica allocation.

unsigned int nSize = 100;
char *text = new char*[nSize]

for (unsigned int i = 0; i < nSize; ++i)
text[i] = new char[nSize];

...
// Deallocation

Kuphryn

Re: Matrix! HELP!!!!

Dominik Reichl27-Jun-03 20:59

Dominik Reichl

27-Jun-03 20:59

A chessboard matrix:

unsigned char pChess[8][8];

To access element 5,1 you would do it like this:
unsigned char u = pChess[1][5];

Dynamic matrix creation is a bit more difficult...

Big Grin | :-D

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: Matrix! HELP!!!!

Anonymous28-Jun-03 9:29

Anonymous

28-Jun-03 9:29

hello,

thanks for reply!!!!!
but i need a dynamic matrix!

can you help me?

thank you very much!
sunny

Getting the rect of the text in a Static

Tommy2k27-Jun-03 11:21

Tommy2k

27-Jun-03 11:21

Is there any good way to do this or do I know a workaround of some sort?

Re: Getting the rect of the text in a Static

basementman27-Jun-03 11:41

basementman

27-Jun-03 11:41

To get the rect of the control or of the text itself?

// Control:
CRect oR;
CWnd *pStatic = GetDlgItem(IDC_THE_STATIC_CTRL);
pStatic->GetWindowRect(&oR);
ScreenToClient(&oR);

// bounding rectangle of static's text contents
CString cText;
GetDlgItemText(IDC_THE_STATIC_CTRL,cText);

CWnd *pStatic = GetDlgItem(IDC_THE_STATIC_CTRL);
pStatic->GetClientRect(&oR);

CDC *pDC = pStatic->GetDC();
pDC->DrawText(cText,&oR,DT_CALCRECT|DT_LEFT|DT_SINGLELINE|DT_TOP);
pStatic->ReleaseDC(pDC);

// oR now has the bounding rectangle needed to display the text.

onwards and upwards...

Re: Getting the rect of the text in a Static

Tommy2k27-Jun-03 11:58

Tommy2k

27-Jun-03 11:58

Wouldn't it be better to just make a memDC so the text itself won't show up on the control (it's already there ofcourse)? Or doesn't it do this anyway?

Re: Getting the rect of the text in a Static

John M. Drescher27-Jun-03 12:33

John M. Drescher

27-Jun-03 12:33

With the DT_CALCRECT the drawtext does not go to the screen it just calculates the rect.
John

Re: Getting the rect of the text in a Static

Tommy2k27-Jun-03 12:38

Tommy2k

27-Jun-03 12:38

Great! Thnx

Re: Getting the rect of the text in a Static

valikac27-Jun-03 11:42

valikac

27-Jun-03 11:42

One solution is to get the rect of the entire edit windows and then use GetTextExtent() to take add and subtract unit size.

Kuphryn

Read a line from a file HANDLE

Blueapples27-Jun-03 11:14

Blueapples

27-Jun-03 11:14

Hi. I'm doing a project where I open a COM port with CreateFile() to do some device accessing. I have writing working fine, but now I'm trying to figure out how to read one line of text from the COM port. The function fgets() would be nice, but it's for FILE structures and I have a HANDLE pointer to the open file.

Is their either
a) a function to create a FILE structure from a HANDLE, or
b) an existing function that does what I want?

I have created a function that I thought would read a file, but it crashes in the Kernel on my call to ReadFile(). Besides, I feel stupid writing such a basic function that I think must be already part of the Win API

I post in this forum because I actually am doing this in an MFC program, and I'm open to MFC solutions.

Thanks in advance.

<br />
/* My function... */<br />
LPSTR ReadLine( HANDLE hFile )<br />
{<br />
    char            c;<br />
    LPSTR            szBuffer;<br />
    unsigned int    pos = 0;<br />
    BOOL            fContinue = true, fCR = false;<br />
    LPDWORD            lpBytesRead = 0;<br />
<br />
    szBuffer = (LPSTR)malloc( 256 );<br />
<br />
    if( szBuffer != NULL )<br />
    {<br />
        while( ReadFile( hFile, &c, 1, lpBytesRead, NULL ) != 0 && fContinue )   ////// ** crashes here ** /////<br />
        {<br />
            switch( c )<br />
            {<br />
            case 0x0A:<br />
                fCR = true;<br />
                break;<br />
            case 0x0D:<br />
                if( fCR )<br />
                {<br />
                    fContinue = false;<br />
                    fCR = false;<br />
                }<br />
                break;<br />
            default:<br />
                fCR = false;<br />
                szBuffer[pos] = c;<br />
                pos ++;<br />
                if( pos == sizeof( szBuffer ) ) <br />
                    fContinue = false;<br />
            }<br />
        }<br />
<br />
        szBuffer[pos] = 0;<br />
    }<br />
<br />
    return szBuffer;<br />
}

Re: Read a line from a file HANDLE

basementman27-Jun-03 11:43

basementman

27-Jun-03 11:43

You may want to look at the function

FILE *_fdopen( int handle, const char *mode );

creates a FILE * from a raw file handle.

onwards and upwards...

Re: Read a line from a file HANDLE

Blueapples27-Jun-03 12:00

Blueapples

27-Jun-03 12:00

Not working. The example for _fdopen in MSDN uses _open() to open the file that's passed to _fdopen.

_open() returns an int, but CreateFile returns a Windows HANDLE pointer. So, this is the type of function I want, but it's required arguments aren't what I have.

Re: Read a line from a file HANDLE

Toni7827-Jun-03 12:15

Toni78

27-Jun-03 12:15

Reading from a COM port is not as straight forward as you might think. You have to create a thread that checks the port constantly for a "data received" signal. Whether you like it or not, you have to use ReadFile(). Check MSDN on serial communications because they have examples there.

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Read a line from a file HANDLE

od@ananzi.co.za15-Sep-03 9:33

od@ananzi.co.za

15-Sep-03 9:33

Howzit BlueApples,

I am quite sure that your problem relates to the lpBytesRead variable that you use. You effectively create a DWORD pointer that points to memory location 0, OUCH !!!! It will crash...

Try this:
DWORD dwBytesRead = 0;
while( ReadFile( hFile, &c, 1, &dwBytesRead, NULL ) != 0 && fContinue ) ////// ** crashes

Cheers

Making an MFC program?

DaveE9th27-Jun-03 10:50

DaveE9th

27-Jun-03 10:50

I want to make an MFC program that allows me to enter a part number and then brings up information on that part. I'd like to allow the user to edit the part numbers after the program is complete. Where do I start and what is the best way to structure the program? Do I have to use a database? I'll have hundreds of part numbers.

Thanks Hmmm | :|

Re: Making an MFC program?

Toni7827-Jun-03 12:18

Toni78

27-Jun-03 12:18

You posted this message on June 26 and Ryan Binns already gave you a reply and I agree with him. Yes you have to use a database. If you don't know database programing you have a learning curve ahead of you.

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: Making an MFC program?

DaveE9th27-Jun-03 19:24

DaveE9th

27-Jun-03 19:24

Toni,

I admire your depth of perception...

Re: Making an MFC program?

Toni7828-Jun-03 9:26

Toni78

28-Jun-03 9:26

But I should I admit that you reach even higher depths of perception that I can't even dream of. I should really encourage you to write your own database from scratch. With you as their main competitor all the database providers will run out of business.

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Recommended reading on MFC?

DaveE9th27-Jun-03 8:25

DaveE9th

27-Jun-03 8:25

I want to learn how to make MFC programs. I was hoping someone would refer me to some great books on the subject. I am a beginner at MFC, so something understandable would be a big plus.

Thanks Cool | :cool:

Re: Recommended reading on MFC?

Matt Newman27-Jun-03 8:29

Matt Newman

27-Jun-03 8:29

Programming Windows with MFC Second Edition by Jeff Prosise. Its huge, around 1300 pages, but very easy to understand and definitely worth it

Matt _Newman

"Two things have come out of Berkley, Unix and Acid, we do not belive this to be a coincidence"
Linux sucks twice as fast and 10 times more reliably, and since you have the source, it's your fault. -Ca1v1n

Post best viewed with lynx

Re: Recommended reading on MFC?

NormDroid27-Jun-03 9:51

NormDroid

27-Jun-03 9:51

Learn Charles Petzold "Windows Programing" by heart.
Next trawl thru the MFC samples.

Look at other peoples code.

The most difficult aspect to MFC is getting this Window from another window.

Example:

Application
MainFrame
Document
View
Toolbar
DlgBar
DockingDialogBar
Combo
Some other Control (SOC)

Now take an example where you want to communicate to from SOC to any other element in the Windows app?

I will demonstrate this technique in an article I'm preparing, just for a note I ask the same question to Jeff Prosise at a Windows Development Conference an he could'nt give me the actual answer.

It's quite easy a simple map store at app level so you can get at any window with little indirection.

Re: Recommended reading on MFC?

Cambalindo27-Jun-03 11:50

Cambalindo

27-Jun-03 11:50

I recommend:
Programming MsVisual C++ Fifth Edition[^]
Authors:
David J. Kruglinski
George Shepherd
Scot Wingo

great book from Ms Press.

Daniel Cespedes

"There are 10 types of people, those who understand binary and those who do not"
"Santa Cruz de la Sierra Paraiso Terrenal!"

daniel.cespedes@ieee.org

MFC going by wayside?

DaveE9th27-Jun-03 8:03

DaveE9th

27-Jun-03 8:03

I read in an Amazon.com review that MFC programming will soon be going by the wayside, is this true? I thought it was here to stay. what would would replace MFC to create Windows programs? I want to learn MFC programming, or should I focus elsewhere?

Thanks

Re: MFC going by wayside?

keegan27-Jun-03 8:16

keegan

27-Jun-03 8:16

i just wrote a program in good old turboC from 1994. languages may get old, but they'll never go obsolete.

*.*

Re: MFC going by wayside?

basementman27-Jun-03 9:44

basementman

27-Jun-03 9:44

I remember working with that! Must be a DOS program. How fast does it run on today's hardware? Must be blazing!

onwards and upwards...

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