What is wrong with this class - C2248 error - C / C++ / MFC Discussion Boards

Re: Creating a Bitmap from a Framegrabber Image

im7910-Jul-06 21:43

im79

10-Jul-06 21:43

Hi, i've tried your code in my appicaltion and have another problem now Sigh | :sigh:

. I need a CBitmap object, so i tried the following:

<br />
CDC *pDC = GetDC();<br />
CBitmap* myBitmap;<br />
<br />
myBitmap = CBitmap::FromHandle(hBitmap);<br />
myBitmap->CreateCompatibleBitmap(pDC, m_iWidth, m_iHeight);<br />
myBitmap->LoadBitmap(IDC_STATIC_PICTURE);//picture control in my dialog<br />

I get an Unhandled exception in wingdi.cpp line 1102:

<br />
BOOL CGdiObject::Attach(HGDIOBJ hObject)<br />
{<br />
 ASSERT(m_hObject == NULL); // <= line 1102<br />
   if (hObject == NULL)<br />
     return FALSE;<br />
 CHandleMap* pMap = afxMapHGDIOBJ(TRUE);<br />
 ASSERT(pMap != NULL);<br />
 pMap->SetPermanent(m_hObject = hObject, this);<br />
 return TRUE;<br />
}<br />

This is the call stack:
>mfc71d.dll!CGdiObject::Attach(void * hObject=0x0305061d) Line 1102 + 0x1c C++
mfc71d.dll!CBitmap::CreateCompatibleBitmap(CDC * pDC=0x00816af4, int nWidth=400, int nHeight=400) Line 217 + 0x25 C++

I hope you can help me again here Smile | :)

im79

Re: Creating a Bitmap from a Framegrabber Image

Justin Tay10-Jul-06 22:55

Justin Tay

10-Jul-06 22:55

im79 wrote:
myBitmap->CreateCompatibleBitmap(pDC, m_iWidth, m_iHeight);

What are you trying to do here?

im79 wrote:
myBitmap->LoadBitmap(IDC_STATIC_PICTURE);//picture control in my dialog

The CBitmap::LoadBitmap function is used to load an image into the bitmap, not set an image into a picture control...

Re: Creating a Bitmap from a Framegrabber Image

im7910-Jul-06 23:12

im79

10-Jul-06 23:12

hfry wrote:
im79 wrote:
myBitmap->CreateCompatibleBitmap(pDC, m_iWidth, m_iHeight);

What are you trying to do here?

I thought that i have to convert the DIB to a DDB Bitmap, so i guess that's wrong Unsure | :~

I just want to display the Bitmap in a picture control, but it's not as easy as i thought

hfry wrote:
The CBitmap::LoadBitmap function is used to load an image into the bitmap, not set an image into a picture control...

Yes that's stupid, I should have read the MSDN manuals

Re: Creating a Bitmap from a Framegrabber Image

Justin Tay10-Jul-06 23:37

Justin Tay

10-Jul-06 23:37

im79 wrote:
it's not as easy as i thought

It is actually.

CStatic *picture = (CStatic*) GetDlgItem(IDC_STATIC_PICTURE);
picture->SetBitmap(hBitmap);

Make sure the static control's type is actually set to Bitmap.

Re: Creating a Bitmap from a Framegrabber Image

im7911-Jul-06 1:16

im79

11-Jul-06 1:16

Hi hfry
It's working Big Grin | :-D

Thank you very much Rose | [Rose]

Re: Creating a Bitmap from a Framegrabber Image

im7930-Mar-08 13:06

im79

30-Mar-08 13:06

i need your (or any one's) help again Smile | :)

I'm trying for long time to change this code in order to make an 8Bit color Bitmap but it's not working Confused | :confused:

I'll be greatfull for any help!

Re: Creating a Bitmap from a Framegrabber Image

Justin Tay1-Apr-08 4:09

Justin Tay

1-Apr-08 4:09

Hi,

RGBQUAD *pColors = pbmi->bmiColors;
for(int i = 0; i < 256; i++)
{
    pColors->rgbBlue = i;
    pColors->rgbGreen = i;
    pColors->rgbRed = i;
    pColors->rgbReserved = 0;
    pColors++;
}

The code snippet above is setting the color table. In your previous question, you wanted it grayscale so the color table so I set it up as such. If you want it to be color you need to setup the appropriate color table that your 8-bit data maps to.

Regards,
Justin Tay

What is wrong with this class - C2248 error

charlieg7-Jul-06 3:24

charlieg

7-Jul-06 3:24

I have two very simple classes as shown below. In my application code, I want to test the
condition of the object - is it valid? But, VC++ tells me :
"error C2248: 'IsValid' : cannot access public member declared in class 'CBaseFile'"

Why? Why? For goodness' sake, why? Is it not declared public? It looks like it, it even tells
me it is public. What obvious goof don't I see?

{
// app code snippet:
CSpecialFile *pSpecialFile = new CSpecialFile("a filename");

if (!pSpecialFile->IsValid()) AfxMessageBox("Oh no!!! Mr. Bill...");
}

class CBaseFile
{
public:
CBaseFile(CString sFilename);
virtual ~CBaseFile();
bool IsValid();

private:
bool m_bIsValid; // true if no problems encountered;
};

Then I inherit from it...

class CSpecialFile: CBaseFile
{
public:
CSpecialFile(CString sFilename);
virtual ~CSpecialFile();

// more methods specific to special file object go here....
};

Charlie Gilley
Will program for food...
Whoever said children were cheaper by the dozen... lied.

My son's PDA is an M249 SAW.

Re: What is wrong with this class - C2248 error

Taka Muraoka7-Jul-06 3:29

Taka Muraoka

7-Jul-06 3:29

You need this:

class CSpecialFile: public CBaseFile

0 bottles of beer on the wall, 0 bottles of beer, you take 1 down, pass it around, 4294967295 bottles of beer on the wall.

Awasu 2.2.2 [^]: A free RSS/Atom feed reader with support for Code Project.

Re: What is wrong with this class - C2248 error

charlieg7-Jul-06 3:39

charlieg

7-Jul-06 3:39

doh! insert sound of hand slapping forehead! Blush | :O

btw, love your sig...

Charlie Gilley
Will program for food...
Whoever said children were cheaper by the dozen... lied.

My son's PDA is an M249 SAW.

Re: What is wrong with this class - C2248 error

C^hris L^osinger7-Jul-06 3:32

C^hris L^osinger

7-Jul-06 3:32

class CSpecialFile: public CBaseFile

Cleek | Image Toolkits | Thumbnail maker

using C in VC express

giddy_guitarist7-Jul-06 3:23

giddy_guitarist

7-Jul-06 3:23

Hie,
i just downloaded VC 2005 express.I opened an old VC 6 project that was written in the C language.When i tried building this in VC 2005 EXPRESS.. it gives me a whole Plethora of errors Cry | :((

.Is the C language no more supported by VC express.Also i installed Microsoft Visual Studio .NET 2003.here VC supports the c language BUT does'nt support XP style.Where as VC 2005 express has a really good XP look .. i mean even the menus have a blue gradient on them.My problem is i NEED TO HAVE A VERSION THAT SUPPORTS XP STYLE AND THE C PROGRAMMING LANGUAGE.i only know C.Also i would really appreciate it if someone pointed me to a good
e-book on using VC with C++ NO MFC! .. i gonna start C++ soon!;P

Re: using C in VC express

C^hris L^osinger7-Jul-06 3:27

C^hris L^osinger

7-Jul-06 3:27

giddy_guitarist wrote:
it gives me a whole Plethora of errors

what errors ???

Cleek | Image Toolkits | Thumbnail maker

Re: using C in VC express

Zac Howland7-Jul-06 3:52

Zac Howland

7-Jul-06 3:52

Many of the old C APIs have been deprecated. I imagine that is the majority of your errors/warnings. You can turn that off using a compiler switch (you'll have to look that up as I don't have VS available at the moment).

These aren't e-books, but they are perhaps the best books you'll find for Win32 programming without MFC:

Programming Windows by Charles Petzold

Programming Applications for Microsoft Windows by Jeffrey Richter

Note: get the older editions as the newer ones have been written with C# (which was a mistake IMHO).

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: using C in VC express

giddy_guitarist31-Mar-07 5:23

giddy_guitarist

31-Mar-07 5:23

Zac Howland wrote:
Many of the old C APIs have been deprecated. I imagine that is the majority of your errors/warnings. You can turn that off using a compiler switch (you'll have to look that up as I don't have VS available at the moment).

Hi , its been a while. Yea , i got petzolds book and other books too and learnt C# , and its awesome!! Way better than win32 , i can build more powerful apps way faster! Without losing my head! (thats for anyone else doing win32)

About my problem , it seems the vc express does'nt come with the PSDK.

Look at this[^]

Hope that helped someone.

Gideon

Static method, non-static variable

Daniel Kanev7-Jul-06 2:45

Daniel Kanev

7-Jul-06 2:45

Is there any way to trick the C++ compiler and get the value of a non-static member variable from a static method.

e.g.

class CDummy
{
public:
int m_myInt;
static void dummy();
};
void CDummy::dummy()
{
int x = m_myInt; ????
}

Thanks!

modified 9-Mar-17 17:16pm.

Re: Static method, non-static variable

RChin7-Jul-06 3:11

RChin

7-Jul-06 3:11

Not without passing a reference to the instance of your class.

I Dream of Absolute Zero

Re: Static method, non-static variable

Zac Howland7-Jul-06 4:01

Zac Howland

7-Jul-06 4:01

Yes ... its called make a non-static version of the method:

class CDummy
{
public:
	int m_myInt;
	static void dummy(const CDummy& dum);
	void dummy() const;
};

void CDummy::dummy(const CDummy& dum)
{
	dum.dummy();
}

void CDummy::dummy() const
{
	int x = m_myInt;
}

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

outlook

pathakr7-Jul-06 2:44

pathakr

7-Jul-06 2:44

Hi,

I have outlook configured on my machine.

I need to send data (textual) to one email contact only .

Means I will have some text ready at some time interval and every tiem I read the data the data should go as email to this address using my outlook config.

How can I achieve this.

pathak

Re: outlook

David Crow7-Jul-06 2:46

David Crow

7-Jul-06 2:46

See here and here for examples of sending e-mail.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

all urls

yang__lee7-Jul-06 2:22

yang__lee

7-Jul-06 2:22

How to get all the URLs (links) on the web page?

Leya

Re: all urls

David Crow7-Jul-06 2:43

David Crow

7-Jul-06 2:43

Use the IHTMLDocument interface to retrieve the <A> elements.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: all urls

Hamid_RT7-Jul-06 2:55

Hamid_RT

7-Jul-06 2:55

See Here[^] maybe it is some helpful to you

whitesky

to make a phone

yogendra kaushik7-Jul-06 2:19

yogendra kaushik

7-Jul-06 2:19

i want to know,that as i insert a edit box on dialog box
and 10 buttons with number on them from 0 to 9.
now i want that when i press these 0-9 buttons
then that will be appear on edit box . I use a progress control on dialog box
and a dial button so that after entering numbers press dial and progress button start
moving
I want as in phone system when we press buttons they appear on screen
and when dial button is pressed phone dials.

Please mail me

Re: to make a phone

Amit Agarrwal7-Jul-06 2:29

Amit Agarrwal

7-Jul-06 2:29

m_sPhoneNumber += "1";
setDlgItemText(IDC_EDIT_PHONE_NUMBER,m_sPhoneNumber);

put that code on button click.

sPhoneNumber is a String.

this code might help u.

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