Re: screen capture to jpg - C / C++ / MFC Discussion Boards

Hi Sirrius,

The problem was very well described by Ryan.

The solution to fix your compilation error is to delete both #include statements.

Here is an example of a simple yet correct way to include header files like your are trying to do:

File ClassA.h:

#ifndef CLASSA_H
#define CLASSA_H
#include "ClassB.h" // <- Remove this line
#include "ClassA.h" // <- Remove this line
class a
{ ... };
#endif

File ClassB.h:

#ifndef CLASSB_H
#define CLASSB_H
#include "ClassA.h" // Include definition of base class.
class b : public a
{ ... };
#endif

If you want to derive other classes from concAbstFactory then simply include "concAbstFactory.h" in the header files for those new derived classes. Your base classes should not have any knowledge of your derived classes.

Hope this helps. Smile | :)

Eric

In the file that defines class abstractFactory, you're including the file that defines class concAbstFactory:

#include "concAbstFactory.h"

concAbstFactory is derived from abstractFactory (which hasn't yet been defined at this point), so there's your hiccup. Remove the include statement mentioned above and try again.

Including the headers of child classes in their base class should make you nervous.

Please pardon the redundant response. I failed to read further into the thread before replying.

Hi
I just installed STLPort on my system, and I find it superior to Dinkumware's implementation of STL. However, I am now building a library that will be used by a lot of users, and not all of them have STLPort on their system. Is there a way that I can build my library and still make it usable on all systems?

Thanks!

Any STL implimentation is going to be in the form of code that you include. So it's already in your program, the compiler puts it there.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Hi
I wanna capture the desktop and save it to a jpg file, I know how to save it to a bmp file uncompressed but that file is to large 3 megs!!.

So I try to modify the code for capturing to an bmp

and I can not view the jpgs I create

what is wrong?

where am I wrong

here is the code:
[code]

#include <windows.h>
// C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>

// TODO: reference additional headers your program requires here
#include <shellapi.h>
#include <commdlg.h>

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
static HBITMAP hDesktopCompatibleBitmap=NULL;
static HDC hDesktopCompatibleDC=NULL;
static HDC hDesktopDC=NULL;
static HWND hDesktopWnd=NULL;

hDesktopWnd=GetDesktopWindow();
hDesktopDC=GetDC(hDesktopWnd);
hDesktopCompatibleDC=CreateCompatibleDC(hDesktopDC);
hDesktopCompatibleBitmap=CreateCompatibleBitmap(hDesktopDC,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN));
SelectObject(hDesktopCompatibleDC,hDesktopCompatibleBitmap);

OPENFILENAME ofn;
char szFileName[512]; szFileName[0]='\0';
ZeroMemory(&ofn,sizeof(ofn));
ofn.lStructSize=sizeof(OPENFILENAME);
ofn.Flags=OFN_HIDEREADONLY|OFN_PATHMUSTEXIST;
ofn.lpstrFilter="JPEG Files (*.jpg)\0*.jpg\0";
ofn.lpstrDefExt="jpg";
ofn.lpstrFile=szFileName;
ofn.nMaxFile=512;
if(!GetSaveFileName(&ofn));

BitBlt(hDesktopCompatibleDC,0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),hDesktopDC,0,0,SRCCOPY);

BITMAPINFO bi;
void *pBits=NULL;
int nWidth=GetSystemMetrics(SM_CXSCREEN);
int nHeight=GetSystemMetrics(SM_CYSCREEN);
ZeroMemory(&bi,sizeof(bi));
bi.bmiHeader.biSize=sizeof(bi.bmiHeader);
bi.bmiHeader.biHeight=nHeight;
bi.bmiHeader.biWidth=nWidth;
bi.bmiHeader.biPlanes=1;
bi.bmiHeader.biBitCount=0;
bi.bmiHeader.biCompression=BI_JPEG;
bi.bmiHeader.biSizeImage=3*nWidth*nHeight;

HDC hBmpFileDC=CreateCompatibleDC(hDesktopCompatibleDC);

StretchDIBits(hBmpFileDC,
// destination rectangle
0,0 ,GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
// source rectangle
0, 0, nWidth, nHeight,
pBits,
&bi,
DIB_RGB_COLORS,
SRCCOPY);

HANDLE hFile=CreateFile(szFileName,GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
if(hFile!=INVALID_HANDLE_VALUE)
{
DWORD dwRet=0;
BITMAPFILEHEADER bmfHeader;
ZeroMemory(&bmfHeader,sizeof(bmfHeader));
bmfHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
bmfHeader.bfSize=bi.bmiHeader.biSizeImage+bmfHeader.bfOffBits;
bmfHeader.bfType='MB';

WriteFile(hFile,&bmfHeader,sizeof(bmfHeader),&dwRet,NULL);
WriteFile(hFile,&bi.bmiHeader,sizeof(bi.bmiHeader),&dwRet,NULL);
WriteFile(hFile,pBits,bi.bmiHeader.biSizeImage,&dwRet,NULL);
CloseHandle(hFile);
}

DeleteDC(hBmpFileDC);

return 0;
}
[/code]

also if anyone knows how to save an ico to a file after I get it's handle please tell me

I need to know

Spiritofamerica wrote:
also if anyone knows how to save an ico to a file after I get it's handle please tell me

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=%23k5tXe9RBHA.1424%40tkmsftngp03&rnum=3&prev=/&frame=on

--
Dad, how strange it is that the pig can speak.
*thoughtful pause* It must have lost its "oink".
(my 3-year old daughter Moa, while watching Babe)

Human beings, who are almost unique in having the ability
to learn from the experience of others, are also remarkable
for their apparent disinclination to do so. (Douglas Adams)

Spiritofamerica wrote:
also if anyone knows how to save an ico to a file after I get it's handle please tell me

Google?

--
Dad, how strange it is that the pig can speak.
*thoughtful pause* It must have lost its "oink".
(my 3-year old daughter Moa, while watching Babe)

Human beings, who are almost unique in having the ability
to learn from the experience of others, are also remarkable
for their apparent disinclination to do so. (Douglas Adams)

anyone any ideas why a slider that increased values as it moved left to right now decreases as the slider is moved from bottom to top? I just changed it from horizontal to vertical through the properties box under msdv6.......shouldnt it increase as the slider is moved up?

cant find an option to rotate/flip it.

If it works anything like a spin button control, the arrows will act reversed until you set the range over which the control is suppost to work after that they should be the correct way up.

Try using the SetRange() function. Also try swapping over the min/max values

If you vote me down, my score will only get lower

Hi I'm kinda new so i'm sorry if i'm ask this in the wrong forum.

I would like to know if it's possible to get the processID of a process that has terminated another process.
Is it possible to get this ID in the process that is (going to be) terminated and/or is it possible to get the ID from a third process that is running at that time.

I searched on Google already, i searched on the MSDN @ MS online, and ofcourse on The Code Project, but I couldn't find anything useful Frown | :(

Although i must say, i find it a hard subject to make a good search on.

Tnx Big Grin | :-D

Loading...

Hi
I wanna capture the desktop and save it to a jpg file, I know how to save it to a bmp file uncompressed but that file is to large 3 megs!!.

So I try to modify the code for capturing to an bmp

and I can not view the jpgs I create

what is wrong?

where am I wrong

here is the code:
[code]

#include <windows.h>
// C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>

// TODO: reference additional headers your program requires here
#include <shellapi.h>
#include <commdlg.h>

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
static HBITMAP hDesktopCompatibleBitmap=NULL;
static HDC hDesktopCompatibleDC=NULL;
static HDC hDesktopDC=NULL;
static HWND hDesktopWnd=NULL;

hDesktopWnd=GetDesktopWindow();
hDesktopDC=GetDC(hDesktopWnd);
hDesktopCompatibleDC=CreateCompatibleDC(hDesktopDC);
hDesktopCompatibleBitmap=CreateCompatibleBitmap(hDesktopDC,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN));
SelectObject(hDesktopCompatibleDC,hDesktopCompatibleBitmap);

OPENFILENAME ofn;
char szFileName[512]; szFileName[0]='\0';
ZeroMemory(&ofn,sizeof(ofn));
ofn.lStructSize=sizeof(OPENFILENAME);
ofn.Flags=OFN_HIDEREADONLY|OFN_PATHMUSTEXIST;
ofn.lpstrFilter="JPEG Files (*.jpg)\0*.jpg\0";
ofn.lpstrDefExt="jpg";
ofn.lpstrFile=szFileName;
ofn.nMaxFile=512;
if(!GetSaveFileName(&ofn));

BitBlt(hDesktopCompatibleDC,0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),hDesktopDC,0,0,SRCCOPY);

BITMAPINFO bi;
void *pBits=NULL;
int nWidth=GetSystemMetrics(SM_CXSCREEN);
int nHeight=GetSystemMetrics(SM_CYSCREEN);
ZeroMemory(&bi,sizeof(bi));
bi.bmiHeader.biSize=sizeof(bi.bmiHeader);
bi.bmiHeader.biHeight=nHeight;
bi.bmiHeader.biWidth=nWidth;
bi.bmiHeader.biPlanes=1;
bi.bmiHeader.biBitCount=0;
bi.bmiHeader.biCompression=BI_JPEG;
bi.bmiHeader.biSizeImage=3*nWidth*nHeight;

HDC hBmpFileDC=CreateCompatibleDC(hDesktopCompatibleDC);

StretchDIBits(hBmpFileDC,
// destination rectangle
0,0 ,GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
// source rectangle
0, 0, nWidth, nHeight,
pBits,
&bi,
DIB_RGB_COLORS,
SRCCOPY);

HANDLE hFile=CreateFile(szFileName,GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
if(hFile!=INVALID_HANDLE_VALUE)
{
DWORD dwRet=0;
BITMAPFILEHEADER bmfHeader;
ZeroMemory(&bmfHeader,sizeof(bmfHeader));
bmfHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
bmfHeader.bfSize=bi.bmiHeader.biSizeImage+bmfHeader.bfOffBits;
bmfHeader.bfType='MB';

WriteFile(hFile,&bmfHeader,sizeof(bmfHeader),&dwRet,NULL);
WriteFile(hFile,&bi.bmiHeader,sizeof(bi.bmiHeader),&dwRet,NULL);
WriteFile(hFile,pBits,bi.bmiHeader.biSizeImage,&dwRet,NULL);
CloseHandle(hFile);
}

DeleteDC(hBmpFileDC);

return 0;
}

[/code]

Sorry, how did you expect this code to save a jpg ?

The best and easiest way is to use GDI+.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

In answer to your email, my articles on GDI+ are not the only ones here that will show you have to save a jpg with GDI+.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

I am planning to use Named Events to provide a scripting interface to my application.

The scripting DLL would fire these Events, say Check box 1 checked etc.

My question is how many Named Events can an application deal with without any problems.
i.e. 1 ~10; 10 ~100; 100 ~ 500 etc.

I thought that Events would provide a nice clean interface; rather than using memory mapped files/mutux protected etc.

Any comments?

grahamfff

You can make hundreds, but you have to ask yourself, would you want to?
You can only wait on, I think, 32 at a time with WaitForMultipleObjects, so having so many events might not be a good solution to your design problem.

It might be better to have a few in several classes, like 'data ready' and 'abort' and a few others. Then find some scheme to generate a queue that you can put command or data items into to be read by your 'processor' when a particular event is set.

If you want to proivde a scripting interface to your application, can't you just embed visual basic for applications, make an OLE Automation Interface, or implement local RPC calls for example?

How to develop a program to receive file from mobile phone to pocket pc 2003?

Hi,
I want to have multiline items in my CTreeCtrl. Therefore I use Custom Draw and the drawing works perfect!
but I have 2 issues:
First I have to know how I can draw the ExpandBox (the box with + and -) left of the Treeitems. Is there any API-function or do I have to create an icon and draw it by myself?
The next issue is related to the position of the rootlines. How can I get the coordinates of the rootlines?

Has somebody of you done this yet? Or do you know some good links?

I did something similiar to what you need in this article which handles the printing of a tree control. It shouldn't be too hard to modify it to do what you need. I handled the special +/- | icons by using GDI to draw them (not too good but ok for printer). I have been thinking of changing these to icons in an image list and handling the drawing of them the same way as the item icons.

Anyway, here is the link Tree control print[^]

If you vote me down, my score will only get lower

thank you! i use an imagelist now

I went through the example code for text to speech conversion. I actually need to pass the text to that program by selectin text from Internet Explorer and then passing it to the VC++ application by some custom built button or right click option.

I'll be greatful if anyone helps me out.

Hello

I want to know how to add a toolbar button to Internet explorer just like we have the "Stop", "Refresh" and other buttons added.

Secondly i want to run a VC++ program when I click on that button. How to do this?

Hello!

I need to change the background of a tab control. I can change the background of the tab windows, but I don't know how to change the background of the surrounding frame, keeping the lines that give the frame-like look.

Does anyone know how to do that?

Thanks in advance.

-Alma-

I'm new C++ learner.
Now I have to convert DIALOG style of the source code into MDI.
Could any expert tell me how to do?
thanks a lot.

It's a very long task.... what I would do is to use AppWizard to create the MDI application skeleton. Then copy the relevant code from the dialog based application to the new generated one.

Jaime