C / C++ / MFC Discussion Boards

dr_nick_riviera11-Mar-03 6:06

11-Mar-03 6:06

how can i play an enhaced metafile (100*100 log. units) on a dibsection (100*100 pixels)?

the code below should do the following:

1. create a dc
2. create a dib section for that dc which has the same width/height in pixels as the
emf in logical units (0.01 mm)
3. play the emf on that dc in such a way that 1 logical unit is mapped to 1 pixel,
meaning: the entire emf is drawn on exactly the bitmap/dc
rest. give me pointers to header/bits, so i can store 'em into a file

: m_dc = device context for emf
: m_file = handle to emf
: m_bounds = bounding rectangle of emf
: Close performes closing of emf, sets m_file/m_dc to proper values

however, i get to see only a small part of the emf in my bitmap
so it would be nice if someone had an idea on how to fix it.
btw: if i use other values than BI_RGB and 32 to that method, my bitmap is black...

this question is somehow related to my previous question
http://www.experts-exchange.com/Programming/Programming_Platforms/Win_Prog/Q_20545052.html

c_boolean FC CImage::GetDIBBits (r_pointer abits, r_dword asize,
r_pointer aheader,
r_dword aheadersize,
c_dword compression,
c_word bitsperpixel)
{
boolean retval = false;
abits = 0;
asize = 0;
aheader = 0;
aheadersize = 0;
if(Close())
{
dword adc;
adc = CreateCompatibleDC(m_dc /* same result as with 0 */); //-------> point 1
if(adc)
{
dword bmp;
rect r;
zero(&r, sizeof(r));
r.right = m_bounds.right - m_bounds.left;
r.bottom = m_bounds.bottom - m_bounds.top;
bitmapinfo b;
dword bihsize = sizeof(bitmapinfoheader) -
(_STDPALLEN * sizeof(rgbquad));
zero(&b, sizeof(b));
b.header.size = sizeof(b.header);
b.header.width = r.right;
b.header.height = r.bottom;
b.header.planes = 1;
b.header.compression = BI_RGB;
b.header.cstype = LCS_sRGB;
b.header.bitcount = 32;
pointer p;
bmp = CreateDIBSection(adc, &b, DIB_RGB_COLORS, p, 0, 0); //-------> point 2
if(bmp)
{
SelectObject(adc, bmp);
if(SetMapMode(adc, MM_TEXT)) //-------> beginning of point 3
{
PlayEnhMetaFile(adc, m_file, &r);
if(GdiFlush()) //-------> the rest
{
bitmapinfo* p;
if(bitsperpixel>16) bihsize += (1 << bitsperpixel) * sizeof(rgbquad);
p = (bitmapinfo*)allocate(bihsize);
if(p)
{
p->header.size = sizeof(p->header);
p->header.width = r.right;
p->header.height = r.bottom;
p->header.planes = 1;
p->header.compression = compression;
p->header.cstype = LCS_sRGB;
p->header.bitcount = bitsperpixel;
if(GetDIBits(adc, bmp, 0, r.bottom+1, 0, &b, DIB_RGB_COLORS))
{
if(p->header.sizeimage <= 0)
{
p->header.sizeimage = (((p->header.width * p->header.bitcount + 31) & ~31) * p->header.height) / 8;
}
pointer bits = allocate(p->header.sizeimage);
if(bits)
{
if(GetDIBits(adc, bmp, 0, r.bottom+1, bits, p, DIB_RGB_COLORS))
{
abits = bits;;
asize = p->header.sizeimage;
aheader = p;
aheadersize = bihsize;
retval = true;
}
else IMAGE_ERROR;
}
if(!(retval)) free(bits);
}
else IMAGE_ERROR;
if(!(retval)) free((r_pointer)p);
}
else IMAGE_MEMORY;
}
else IMAGE_ERROR;
}
else IMAGE_ERROR;
DeleteObject(bmp);
}
else IMAGE_ERROR;
DeleteDC(adc);
}
else IMAGE_ERROR;
}
else IMAGE_EMPTY;
return retval;
}

thanks in advance,
Thomas

PlayEnhMetaFile

dr_nick_riviera11-Mar-03 6:04

dr_nick_riviera

11-Mar-03 6:04

hi fellows,
i encountered a strange problem i cannot solve that easy:

i want to do the following:
- read an enhanced metafile from disk
- create an new enhanced metafile device context in memory
- play the loaded emf on this context
(therefore the bounding rectangles should match i think)
- now i can draw on the dc over the loaded emf
- store the new emf on disk
(the old one is in the background, maybe some text/line is drawn above)

up to now i did in my member function of a class:

dword z = GetEnhMetaFileA(afilename);
if(z)
{enhmetaheader h;
if(GetEnhMetaFileHeader(z, sizeof(h), h))
{
m_bounds = h.frame;
m_dc = CreateEnhMetaFileA(m_dc, 0, &m_bounds, IMAGE_NAME);
if(m_dc)
{
if(PlayEnhMetaFile(m_dc, z, &m_bounds))
{
m_clip = CreateRectRgnIndirect(&m_bounds);
if(m_clip) SelectClipRgn(m_dc, m_clip);
}
else IMAGE_ERROR;
}
else IMAGE_ERROR;
if(!(retval)) Clear();
}
else IMAGE_ERROR;
DeleteEnhMetaFile(z);
}
else IMAGE_ERROR;

the datatypes, functionprototypes and the macro IMAGE_ERROR look maybe odd
but work definitely
m_bounds is of type rect, a member variable
m_dc and m_clip are also member variables

i had two cases of error:

in the first, a self drawn and stored emf was loaded
(which can be loaded correctly with any graphics software),
the PlayEnhMetaFile fails but GetLastError returnes NO_ERROR.
if i store the result again with CloseEnhMetaFile and CopyEnhMetaFile,
the picture is shrinked to a very small rectangle in a huge white area.

in the second i try to load an emf generated by a graphics suite,
here it works all fine (at the first glance),
but if i try to store the result again, it gives me an empty
picture.

the storing routine works all fine (since i can watch
self-generated and stored emfs)

so what's wrong?
can somebody help me?

Separate all lines in a string?

Rickard Andersson²⁰11-Mar-03 6:02

Rickard Andersson²⁰

11-Mar-03 6:02

First:
How can I get the number of lines in a string (basic_string) object?
After I know the number of lines I will create an array like this:

string lines[number_of_lines];

Then, I want to put each line from a string into this array, but how?
Is the only way to find each \n and then make a substring from the beginning to the position of \n?

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Separate all lines in a string?

Big Art11-Mar-03 7:27

Big Art

11-Mar-03 7:27

You could use CString::Replace(..) fn replacing the \n with the same thing \n. This will leave the string unchanged and return the total number of occurances ie. your line count. After you use it to create your new array you can then tokenize you string into substrings.

Art

Re: Separate all lines in a string?

Rickard Andersson²⁰11-Mar-03 8:34

Rickard Andersson²⁰

11-Mar-03 8:34

Art Friesz wrote:
You could use CString::Replace(..) fn

No, I could not... I'm not using MFC at all in this project! Smile | :)

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Separate all lines in a string?

Alvaro Mendez11-Mar-03 11:13

Alvaro Mendez

11-Mar-03 11:13

Rickard Andersson wrote:
Is the only way to find each \n and then make a substring from the beginning to the position of \n?

Yes.

Also, string lines[number_of_lines] is not going to work since number_of_lines won't be constant. You can allocate the array dynamically, or better yet use a vector.

Regards,
Alvaro

Quitters never win. Winners never quit. But those who never win and never quit are idiots. -- despair.com

Re: Separate all lines in a string?

valikac11-Mar-03 12:16

valikac

11-Mar-03 12:16

One solution is to loop through the source string and assign new lines accordlying.

Kuphryn

Popup MsgBox without a parent to pass?

dazinith11-Mar-03 6:01

dazinith

11-Mar-03 6:01

i have a function which vb is calling from my c++ dll.. the function takes a little while so i wanted to popup a dialog telling them to wait a bit.. im assuming that i cant popup a dialog from a dll as i am crashing when i tell the dialog to go modal:

INT_PTR CDialog::DoModal()
{
	// can be constructed with a resource template or InitModalIndirect
	ASSERT(m_lpszTemplateName != NULL || m_hDialogTemplate != NULL ||
		m_lpDialogTemplate != NULL);

	// load resource as necessary
	LPCDLGTEMPLATE lpDialogTemplate = m_lpDialogTemplate;
	HGLOBAL hDialogTemplate = m_hDialogTemplate;
	HINSTANCE hInst = AfxGetResourceHandle(); <--- crashing here

is there a built in messagebox that doesnt have an ok or cancel that i can show and hide without needing a resource? i have a progresswnd that i got here from CP, but it crashes because i pass NULL for the parent.. is there a way to tell the parent that is calling the dll's function? or a way to pass a CWND pointer from VB into my function?

thanks for ne tips!

still a newb.. cut me some slack :P
-dz

Re: Popup MsgBox without a parent to pass?

dazinith11-Mar-03 6:17

dazinith

11-Mar-03 6:17

woops looks like i was crashin with the progress window because i left out the following in the begining of my dll's function:

AFX_MANAGE_STATE(AfxGetStaticModuleState());

woops! but for reference, is there a window built into mfc i can show and hide with no ok or cancel on it?

thanks!

still a newb.. cut me some slack :P
-dz

Re: Popup MsgBox without a parent to pass?

Alvaro Mendez11-Mar-03 11:17

Alvaro Mendez

11-Mar-03 11:17

dazinith wrote:
is there a window built into mfc i can show and hide with no ok or cancel on it?

Nope. That would have made MFC more than just a wrapper class library, and (apparently) the MFC developers didn't want to work too hard. Smile | :)

Regards,
Alvaro

Quitters never win. Winners never quit. But those who never win and never quit are idiots. -- despair.com

What is wrong with this code? An URGENT question.

mijarral11-Mar-03 5:57

mijarral

11-Mar-03 5:57

// All records in CObArray Pids have same data
// after for loop.
CObArray Pids;
CAPidT* T=new CAPidT; // CAPidT is public of CAPid;
CAPid* Q=new CAPid;
CString s;
int n=pDoc->m_iSelectedPids;
Pids.SetSize(n);

for(int i=0;i<n;++i)
{
="" q="(CAPid*)pDoc-">m_obaSelectedPids[i];
T->SetPid(Q);
Pids[i]=T;
}
Thanks.

Re: What is wrong with this code? An URGENT question.

Maximilien11-Mar-03 6:32

Maximilien

11-Mar-03 6:32

please reformat the code. Use the < > buttons below for the <> signs because they get eaten by the codeproject beast.

After it's reformated, can you tell us what is the problem ? does it crash, does it give bad results ?

Are you sure you don't go over the array bounds in the loop ?

Thanks.

Max.

Maximilien Lincourt
For success one must aquire one's self

Driver not capable at Update

ElizabethC11-Mar-03 5:43

ElizabethC

11-Mar-03 5:43

I am starting to receive driver not capable error about a week ago on one of the Oracle tables I used in the application, when doing an Update to the CRecordset.
For example:
m_pSet->Edit();
UpdateData(TRUE);
m_pSet->Update();

I have VC++ 6 Enterprise and Oracle ODBC 9.x. This problem only occurs in one table.

-Elizabeth

Eilzabeth

Re: Driver not capable at Update

Alvaro Mendez11-Mar-03 11:20

Alvaro Mendez

11-Mar-03 11:20

Hmmmm, it sure smells as though you don't have UPDATE privileges on the table.

Regards,
Alvaro

Quitters never win. Winners never quit. But those who never win and never quit are idiots. -- despair.com

Re: Driver not capable at Update

Anonymous11-Mar-03 12:24

Anonymous

11-Mar-03 12:24

I am not sure what was causing it. For sure it is not the update privilege. After I reset the filter (m_pSet->m_strFilter = ""; m_pSet->Requery(); and did some m_pSet->MoveNext() to get to the record), I was able to do an update successfully.

Driver not capable does not tell me any information about why sometimes I can't do an Update().

Re: Driver not capable at Update (same as the previous reply)

ElizabethC11-Mar-03 12:52

ElizabethC

11-Mar-03 12:52

Re: Driver not capable at Update

ramki kicha11-Mar-03 17:45

ramki kicha

11-Mar-03 17:45

After an EDIT(0 ,there should not be any call to Move XXX() functions .Did u try the function canupdate() function

Re: Driver not capable at Update

ElizabethC12-Mar-03 12:29

ElizabethC

12-Mar-03 12:29

There was not a Move function after Edit function. However, I didn't check if the record set CanUpdate. Does CanUpdate give me a more specific reason instead of Driver not capable?

Eilzabeth

webbrowser2 navigate help

Doom11-Mar-03 5:18

Doom

11-Mar-03 5:18

I am trying to access an html file which is in the same directory as the .exe of the program, but whenever i nav there it adds http:// to the url. I do not want to use the full file://c:/... extension but would like to do it local to the exe.
If anyone knows an easy solution could you fill me in?
I am not sure wehre they will put the exe and all that when it is on the client machine so i would like to access it in a relative url fashion, however if someone knows some code to find the current path of the program that i could use that and attache like index.htm on it.

Any help or sample code would be appreciated

Re: webbrowser2 navigate help

Big Art11-Mar-03 6:08

Big Art

11-Mar-03 6:08

Try using GetModuleFileName(...)

Re: webbrowser2 navigate help

Doom11-Mar-03 6:53

Doom

11-Mar-03 6:53

that got the path of the exe Smile | :)

i have not tested it with my navigate yet because all that code is at home but i will let you know, all should be good though
thanks alot

CListCtrl

JensB11-Mar-03 5:15

JensB

11-Mar-03 5:15

Hi
I've just worked a bit with the CListCtrl but i want to have gridlines around items and subitems.

I think it's very simple, but i don't seem to find it

Greetings
Jens

Re: CListCtrl

Joan M11-Mar-03 5:28

Joan M

11-Mar-03 5:28

A little sample:

//------------------------------------------------
// Obtain the current style and style ex...
DWORD dwExStyle = this->m_cLCtrlParametritzacions.GetExtendedStyle();
DWORD dwStyle = this->m_cLCtrlParametritzacions.GetStyle();
//------------------------------------------------
// Modify the styles as desired
dwStyle |= LVS_SINGLESEL | LVS_SHOWSELALWAYS | LVS_NOSORTHEADER;
dwExStyle |= LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES;   <code>this is what you want</code>
//------------------------------------------------
// Apply those styles...
this->m_cLCtrlParametritzacions.ModifyStyle(0,dwStyle);
this->m_cLCtrlParametritzacions.SetExtendedStyle(dwExStyle);  <code>Here is where the modification gets applied</code>
//------------------------------------------------
// Hack the items height using a imagelist whitout icons...
this->m_cilHackItemHeight.Create(1,30,ILC_COLOR,1,1);
this->m_cLCtrlParametritzacions.SetImageList(&m_cilHackItemHeight,LVSIL_SMALL);

Hope this helps...

Re: CListCtrl

JensB11-Mar-03 20:33

JensB

11-Mar-03 20:33

m_listkiezers is a CListCtrl.

at: DWORD dwExStyle = m_listkiezers.GetExtendedStyle();

i get the following error:
error C2039: 'SetExtendedStyle' : is not a member of 'CListCtrl'

I searched for the class members for CListCtrl and 'SetExtendedStyle' was in it but it won't accept it.

Can you help me?

Thanks
Jens

Re: CListCtrl

Joan M12-Mar-03 20:29

Joan M

12-Mar-03 20:29

By now I don't know what can happen...

please, post a message with the code and the version of VC++ you are using...

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