C / C++ / MFC

Re: Error LNK 2019 problem

31-Jan-07 20:57

Did you declare body for functions on the FloatText.cpp

WhiteSky

Alex Cutovoi1-Feb-07 4:13

Alex Cutovoi

1-Feb-07 4:13

Problem solved guys, I include the files in my project with the option, right clicking in my project and selecting "Add Existing Item". And works fine.

thanks for the support

Re: Error LNK 2019 problem

Hamid_RT1-Feb-07 18:16

need help on a simple question

1-Feb-07 18:16

I glad you find it Big Grin | :-D

WhiteSky

murphdx31-Jan-07 13:57

murphdx

31-Jan-07 13:57

Hello. I am very new to C++ programming so I hope someone could help me out. I am writing a program for a class in which you input your weight, height, and age, in inches, and it will output your waist size, jacket size, and hat size. The only problem is that for every two years over the age of 28, you have to adjust the waist size by adding 0.1 inch, and you can't add anything until a full two years have passed. This is my only problem in the code that I don't understand - the rest of the program works fine. If someone could help me out that would be great!!

Re: need help on a simple question

Christian Graus31-Jan-07 15:04

Christian Graus

31-Jan-07 15:04

So, you need to work out someone's age, in years, and then add floor((age-28)/2) * .1 to the wast size. This means you need to include math.h

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Re: need help on a simple question

Stephen Hewitt31-Jan-07 15:56

Stephen Hewitt

31-Jan-07 15:56

Assume an age of 0. In that case we have:
floor((0.0-28)/2)*.1
which equals floor(-28.0/2)*.1
which equals -14.0*.1
which equals -1.4

I think perhaps an additional check that the age is greater than 28 is needed.

Steve

Re: need help on a simple question

murphdx1-Feb-07 11:44

murphdx

1-Feb-07 11:44

Thanks for the help - works great now!!!

CString

Laing,James31-Jan-07 12:40

Laing,James

31-Jan-07 12:40

Hello.

Is there a way to read the (stdout) output from another application directly into a CString? ie) when I specify my application in a series of piped command-line apps, what is the best way to read from stdin, so that I can read data directly into a CString rather than have to worry about the length of the lines of input data?

Thanks in advance.
James.

Re: CString

James R. Twine31-Jan-07 15:11

James R. Twine

31-Jan-07 15:11

   I do not know if you can do that using stdin without using a intermediate buffer of some kind.

   You can always continue to read stdin in chunks, like reading it into a 1KB buffer and appending the buffer to the CString, until you hit the end of the output data (EOF).

   There may be a way to do it using the C++ stream classes and std::string, but I am not certain if you will not still have to use some intermediate transfer mechanism.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: CString

Laing,James1-Feb-07 9:00

Laing,James

1-Feb-07 9:00

Thanks for the reply.

I have ended up using a 'string' class object to read into from cin and getting a const char pointer to it, so that I can get the data into a CString. What a mess, but it works.

Thanks.
James.

viewing and updating bitmaps

kitty531-Jan-07 12:08

kitty5

31-Jan-07 12:08

I've created an MDI application where when I open one dialog it shows a bitmap from my C:/ by:

<br />
void Image::showPicture(BYTE bfr[], DWORD size)<br />
{<br />
	HBITMAP m_bitmap = NULL;<br />
	CImage image;<br />
	CJpeg2kDecoder imDec;<br />
	<br />
	image = imDec.Open(bfr, size);<br />
	m_bitmap = (HBITMAP)image;<br />
	m_nCam1img.SetBitmap(m_bitmap);<br />
	if (m_bitmap) DeleteObject(m_bitmap);<br />

However, when I open another dialog to do commanding (this dialog will partially cover the bitmap dialog) then go back to view my bitmap the portion of the bitmap dialog covered up by the commanding dialog is GONE!

What do i need to do so that when I go back to view the bitmap dialog that the whole picture will still be displayed?
Thanks!

Kitty5

Christian Graus31-Jan-07 15:05

Christian Graus

31-Jan-07 15:05

What is m_nCam1img ? You're deleting the bitmap, why, when it's in use ?

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

kitty51-Feb-07 2:14

kitty5

1-Feb-07 2:14

m_nCam1img is the variable for the picture control.

the if (m_bitmap) DeleteObject(m_bitmap);

I thought that that was what you needed to do. I did some research on how to view bmps and all the sample code had that....

Kitty5

Christian Graus1-Feb-07 9:16

Christian Graus

1-Feb-07 9:16

Try removing it. You do need to call it, but after you're not using the bitmap anymore. I don't think a picture control makes a copy.

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Hamid_RT31-Jan-07 19:37

31-Jan-07 19:37

What happens if you delete this line if (m_bitmap) DeleteObject(m_bitmap);

WhiteSky

kitty51-Feb-07 2:16

kitty5

1-Feb-07 2:16

ok so I deleted the line:
if (m_bitmap) DeleteObject(m_bitmap);
but i still have the same problem.
is there an update function for the window when the mouse clicks back to view the picture dialog box after the command dialog box was on top of it?

Kitty5

Mark Salsbery1-Feb-07 11:24

Ghosting out a whole groupbox?

1-Feb-07 11:24

Your CImage object goes out of scope at the end of the function so it probably destroys the
HBITMAP via its destructor.

Instead of

m_bitmap = (HBITMAP)image;

try

m_bitmap = image.Detach();

and remove this line:
if (m_bitmap) DeleteObject(m_bitmap);

Mark

CoffeeAddict1931-Jan-07 11:02

CoffeeAddict19

31-Jan-07 11:02

I'm try to put a together a dialog box so that when a user makes a choice in the first groupbox between 2 radio buttons, one of the two other group boxes ghosts out and the user finishes the form, and then clicks "OK". The question is- can anyone tell me how to "ghost out" or "gray out" the group boxes? I've figured out a way to do this with CEdit text boxes (SetReadOnly()) but I can't find a method for group boxes (or if they even have a class devoted to them). I'd appreciate any help. Here is a screen shot of what I am working on:
http://img.photobucket.com/albums/v50/blackdwarf/timesearch.jpg[^]

Mark Salsbery31-Jan-07 11:40

31-Jan-07 11:40

Use EnableWindow(FALSE) instead of SetReadOnly() to gray-out controls Smile | :)

Mark

Mark Salsbery31-Jan-07 11:43

31-Jan-07 11:43

By the way, group boxes are buttons with the BS_GROUPBOX style. Usually they stay static while
controls "grouped" within them may be disabled (grayed) or enabled.

Mark

Mark Salsbery31-Jan-07 12:03

31-Jan-07 12:03

Sorry, got interrupted and answered abruptly before.

CoffeeAddict19 wrote:
The question is- can anyone tell me how to "ghost out" or "gray out" the group boxes?

MFC:
GetDlgItem(ID_MYGROUPBOX)->EnableWindow(FALSE);
Non MFC:
::EnableWindow(::GetDlgItem(hwndDlg, ID_MYGROUPBOX), FALSE);

The Windows GDI and Regions

CoffeeAddict1931-Jan-07 13:03

CoffeeAddict19

31-Jan-07 13:03

Thanks! I'll get back to you and let you know if it works. Smile | :)

TheDelChop31-Jan-07 10:05

TheDelChop

31-Jan-07 10:05

Hola friends,

I'm working with a Dialog Box that has a rectangle associated with it so that I may draw in it. However, I am interested in adding regions to the rectangle, which I don't seem to have too much trouble doing. However, once I add my regions (three) all of the code within my WM_PAINT message seems to be constricted to drawing within the last region.

Does anyone know what happens to the DC when I create a region, and does anybody have any suggestions on how I might be able to change it back to the entire rectangle, like it was originally set?

Thanks,

Joe

Re: The Windows GDI and Regions

Stephen Hewitt31-Jan-07 11:35

Stephen Hewitt

31-Jan-07 11:35

Show some code. I suspect you need to use the CombineRgn function with RGN_OR set in fnCombineMode to make a combined region and then select that into the DC.

Steve

Re: The Windows GDI and Regions

Hamid_RT31-Jan-07 20:14