Re: Custom Draw of TreeView-Control - C / C++ / MFC Discussion Boards

Anonymous5-Jul-04 11:40

5-Jul-04 11:40

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]

Re: screen capture to jpg

Christian Graus5-Jul-04 12:13

Christian Graus

5-Jul-04 12:13

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

Re: screen capture to jpg

Christian Graus15-Sep-04 11:43

Christian Graus

15-Sep-04 11:43

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

Events - How Many

Grahamfff5-Jul-04 10:22

Grahamfff

5-Jul-04 10:22

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

Re: Events - How Many

Blake Miller6-Jul-04 12:47

Blake Miller

6-Jul-04 12:47

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?

Receiving File from Mobile phone

steve chua5-Jul-04 10:14

steve chua

5-Jul-04 10:14

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

Custom Draw of TreeView-Control

steven115-Jul-04 10:13

steven11

5-Jul-04 10:13

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?

Re: Custom Draw of TreeView-Control

Roger Allen6-Jul-04 4:25

Roger Allen

6-Jul-04 4:25

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

Re: Custom Draw of TreeView-Control

steven116-Jul-04 5:36

steven11

6-Jul-04 5:36

thank you! i use an imagelist now

About SAPI

Member 12180445-Jul-04 9:36

Member 1218044

5-Jul-04 9:36

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.

Adding a toolbar button to Internet Explorer

Member 12180445-Jul-04 9:24

Member 1218044

5-Jul-04 9:24

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?

CTabCtrl frame background color

alma5-Jul-04 8:46

alma

5-Jul-04 8:46

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-

help, style convert: Dialog -> MDI

junhonguk5-Jul-04 6:51

junhonguk

5-Jul-04 6:51

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.

Re: help, style convert: Dialog -> MDI

Jaime Stuardo5-Jul-04 7:06

Jaime Stuardo

5-Jul-04 7:06

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

How to take a snapshot from a (partially o fully) hidden window

Member 1338885-Jul-04 6:48

Member 133888

5-Jul-04 6:48

Help !!!
Any idea? Dead | X|

Re: How to take a snapshot from a (partially o fully) hidden window

Ravi Bhavnani5-Jul-04 7:56

Ravi Bhavnani

5-Jul-04 7:56

If by "snapshot" you mean capture its bitmap to the clipboard, you might want to try this:

Get the currently active window
Make the target window the active window
Capture its bitmap to the clipboard[^]
Restore the state of the previously active window

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: How to take a snapshot from a (partially o fully) hidden window

Scozturk5-Jul-04 9:22

Scozturk

5-Jul-04 9:22

Here is a win32 code:

<br />
int	Screenshot(HDC hdc, char *pszflname)<br />
{<br />
	HDC					memdc;<br />
	HANDLE				hfl;<br />
	DWORD				dwBytes, dwWidth, dwHeight, dwNumColors, dwBPP, ColorSize;<br />
	void				*pBits;<br />
	HBITMAP				hbmp;<br />
	BITMAPFILEHEADER	fileheader;<br />
	BITMAPINFOHEADER	infoheader;<br />
	RGBQUAD				colors[256];<br />
	BITMAPINFO			bmpinfo;<br />
	HGDIOBJ				hret;<br />
<br />
	dwWidth = GetDeviceCaps(hdc, HORZRES);<br />
	dwHeight = GetDeviceCaps(hdc, VERTRES);<br />
	dwBPP = GetDeviceCaps(hdc, BITSPIXEL);<br />
	if (dwBPP <= 8)<br />
		dwNumColors = 256;<br />
	else<br />
		dwNumColors = 0;<br />
	if (!(memdc = CreateCompatibleDC(hdc)))<br />
		return (0);<br />
	bmpinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);<br />
	bmpinfo.bmiHeader.biWidth = dwWidth;<br />
	bmpinfo.bmiHeader.biHeight = dwHeight;<br />
	bmpinfo.bmiHeader.biPlanes = 1;<br />
	bmpinfo.bmiHeader.biBitCount = (WORD)dwBPP;<br />
	bmpinfo.bmiHeader.biCompression = BI_RGB;<br />
	bmpinfo.bmiHeader.biSizeImage = 0;<br />
	bmpinfo.bmiHeader.biXPelsPerMeter = 0;<br />
	bmpinfo.bmiHeader.biYPelsPerMeter = 0;<br />
	bmpinfo.bmiHeader.biClrUsed = dwNumColors;<br />
	bmpinfo.bmiHeader.biClrImportant = dwNumColors;<br />
	hbmp = CreateDIBSection(hdc, &bmpinfo, DIB_PAL_COLORS, &pBits, NULL, 0);<br />
	if (!hbmp)<br />
	{<br />
		DeleteDC(memdc);<br />
		return (0);<br />
	}<br />
	hret = SelectObject(memdc, hbmp);<br />
	if (!hret || (hret == HGDI_ERROR))<br />
	{<br />
		DeleteDC(memdc);<br />
		return (0);<br />
	}<br />
	if (!BitBlt(memdc, 0, 0, dwWidth, dwHeight, hdc, 0, 0, SRCCOPY))<br />
	{<br />
		DeleteDC(memdc);<br />
		return (0);<br />
	}<br />
	if (dwNumColors)<br />
		dwNumColors = GetDIBColorTable(memdc, 0, dwNumColors, colors);<br />
	fileheader.bfType = 0x4D42;<br />
	ColorSize = dwNumColors * sizeof(RGBQUAD);<br />
	fileheader.bfSize = ((dwWidth*dwHeight*dwBPP) >> 3) + ColorSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);<br />
	fileheader.bfReserved1 = fileheader.bfReserved2 = 0;<br />
	fileheader.bfOffBits = ColorSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);<br />
	infoheader.biSize = sizeof(BITMAPINFOHEADER);<br />
	infoheader.biWidth = dwWidth;<br />
	infoheader.biHeight = dwHeight;<br />
	infoheader.biPlanes = 1;<br />
	infoheader.biBitCount = (WORD)dwBPP;<br />
	infoheader.biCompression = BI_RGB;<br />
	infoheader.biSizeImage = infoheader.biClrImportant = 0;<br />
	infoheader.biXPelsPerMeter = infoheader.biYPelsPerMeter = 0;<br />
	infoheader.biClrUsed = dwNumColors;<br />
	hfl = CreateFile(pszflname, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);<br />
	if (hfl == INVALID_HANDLE_VALUE)<br />
	{<br />
		DeleteObject(hbmp);<br />
		{<br />
			DeleteDC(memdc);<br />
			return (0);<br />
		}<br />
	}<br />
	WriteFile(hfl, &fileheader, sizeof(BITMAPFILEHEADER), &dwBytes, 0);<br />
	WriteFile(hfl, &infoheader, sizeof(BITMAPINFOHEADER), &dwBytes, 0);<br />
	if (!dwNumColors)<br />
		WriteFile(hfl, colors, ColorSize, &dwBytes, 0);<br />
	ColorSize = (dwWidth * dwHeight * dwBPP) >> 3;<br />
	WriteFile(hfl, pBits, ColorSize, &dwBytes, 0);<br />
	CloseHandle(hfl);<br />
	DeleteObject(hbmp);<br />
	DeleteDC(memdc);<br />
	return (1);<br />
}<br />

and you can use it like this

<br />
Screenshot(GetDC(GetDesktopWindow()), "myscreenshot.bmp");<br />

I hope this helps....

Well... I am a beginner ...

Re: How to take a snapshot from a (partially o fully) hidden window

Jijo.Raj5-Jul-04 21:34

Jijo.Raj

5-Jul-04 21:34

Simply Great!!!
A very useful code snippet.

Thanks a lot... Wink | ;)

Regards,
Jijo.

________________________________

Yesterday is history,
Tomorrow is a mystery,
But today is a present.

Calling C++ DLL ( not MFC) from another C++ DLL ( not MFC)

chepuri_uk5-Jul-04 6:06

chepuri_uk

5-Jul-04 6:06

Hi,

I have a C++ DLL ( not MFC )which has a static method
say
class Test
{
static GetData();
Static GetParams();
bool TestDatat();

};

I am exporting this class and using in another DLL.

I built Test.dll,Test.lib.

Now i included in another DLL(say Samp.DLL):
Test.dll,Test.lib abd Test.h
in Samp.h file i inclued "Test.h" and linkedTest.lib and Placed Test.dll in Release/Debug folder.

I am calling Test::GetData() in Samp.DLL.
But after compiling Samp.DLL giving error like:

"error LNK 2001: unresolved external symbol. _declspec(dllimport) public:static bool _stdcall Test::GetDatta(char const *,bool)(_imp_?GetData@Test@SG_NPBD_N@Z)".

while building if i change project setttings "_cdecl*" in calling conventions, DLL is building fine,but failing to call a value from Samp.DLL by passing value to Test.DLL.

If i what to build my Samp.DLL by "_stdcall" convention how can i build this ?

Any help on this..

Thank you.

Re: Calling C++ DLL ( not MFC) from another C++ DLL ( not MFC)

Jaime Stuardo5-Jul-04 8:13

Jaime Stuardo

5-Jul-04 8:13

Have you exported using _declspec(dllexport) and imported using _declspec(dllimport)?

Can you show how you are importing and exporting?

Jaime

Re: Calling C++ DLL ( not MFC) from another C++ DLL ( not MFC)

Jeremy Falcon5-Jul-04 8:57

Jeremy Falcon

5-Jul-04 8:57

[edit] ~~Regular DLLs don't~~ You shouldn't [/edit] expose objects in a regular DLL (only ActiveX or MFC Extension DLLs) if you want the calling code to be something besides C++. You'll need to export a regular C-style function that serves as a wrapper to the method/property you are trying to invoke.

Jeremy Falcon

Re: Calling C++ DLL ( not MFC) from another C++ DLL ( not MFC)

Jörgen Sigvardsson5-Jul-04 10:28

Jörgen Sigvardsson

5-Jul-04 10:28

He's exporting a regular C++ class. Nothing magical about that, and is certainly possible with DLLs.

--
Ich bin Joachim von Hassel, und ich bin Pilot der Bundeswehr.
Welle: Erdball - F104-G Starfighter

Re: Calling C++ DLL ( not MFC) from another C++ DLL ( not MFC)

Jeremy Falcon5-Jul-04 10:51

Jeremy Falcon

5-Jul-04 10:51

Possible, but not practical and in poor practice IMO. Because, if you do that, then your calling language has to be C++.

Jeremy Falcon

"%1" %*

Larsson5-Jul-04 5:45

Larsson

5-Jul-04 5:45

Hello,
I have a hevey problem your you out there,
I need to right a app that handle the "%1" %*
when a app start.

When a app start my app should start and then i want
to check what app thats realy starded how do i do that?

Re: "%1" %*

Maximilien5-Jul-04 6:31

Maximilien

5-Jul-04 6:31

Please rephrase your question because I really don't understand what you are asking !!!

Maximilien Lincourt
Your Head A Splode - Strong Bad

Last Visit: 31-Dec-99 18:00 Last Update: 6-Jun-24 21:14

Refresh

ᐊ Prev 1...12815 12816 12817 128181281912820 12821 12822 12823 12824 Next ᐅ

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