C / C++ / MFC Discussion Boards

C^hris L^osinger8-Aug-05 10:07

8-Aug-05 10:07

wookie182 wrote:
HDC hDC_txt = CreateCompatibleDC(0);
int b = BitBlt(hDC_bmp,0,0,200,200,hDC_txt,0,0,BLACKNESS);

this is a problem.

before you Blt to a DC, that DC needs to have a bitmap selected into it.

but, i'm not sure why you need hDC_txt in the first place. you should be able to do a DrawText onto hDC_bmp (after selecting your bitmap into hDC_bmp, of course).

Cleek | Image Toolkits | Thumbnail maker

Re: Drawing Text into a Bitmap with GDI

wookie1828-Aug-05 10:27

wookie182

8-Aug-05 10:27

Well if I do without the hDC_txt it produces the same result. Only 24byte (nonsens) are writen in the Buffer. My new code looked like this

<br />
...<br />
	BITMAP bmp = {0,m_ImageWidth,m_ImageHeight,m_ImageWidth,1,8,pBuffer};<br />
	HBITMAP hBMP = CreateBitmapIndirect(&bmp);<br />
	HDC hDC_bmp = CreateCompatibleDC(0);<br />
	HBITMAP hBMPc = CreateCompatibleBitmap(hDC_bmp,m_ImageWidth,m_ImageHeight);<br />
	HGDIOBJ x =	SelectObject(hDC_bmp, hBMPc);<br />
<br />
	char text_tag[16];<br />
	sprintf(text_tag,"0123456789");<br />
	RECT rect = {0,0,200,200};<br />
	<br />
	int a = DrawText(hDC_bmp,TEXT(text_tag),1,&rect,DT_LEFT);<br />
<br />
        BITMAPINFO bmInfo;<br />
        memset(&bmInfo.bmiHeader,0,sizeof(BITMAPINFOHEADER));<br />
        bmInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);<br />
        bmInfo.bmiHeader.biWidth=m_ImageWidth;<br />
        bmInfo.bmiHeader.biHeight=m_ImageHeight;<br />
        bmInfo.bmiHeader.biPlanes=1;<br />
        bmInfo.bmiHeader.biBitCount=8;<br />
	<br />
	HBITMAP g = CreateDIBitmap(hDC_bmp,&bmInfo.bmiHeader,0,0,0,DIB_RGB_COLORS);<br />
<br />
	int c = GetObject(g,1024*1024,(void*)pBuffer__);<br />

I'm very new to this GDI stuff. And I don't exactly know what I'm actually doing. I just want to have text in my bitmap.... so please tolerate some stupid misstakes and questions...

Thanks
Chris

Re: Drawing Text into a Bitmap with GDI

John R. Shaw8-Aug-05 20:02

John R. Shaw

8-Aug-05 20:02

Ahhh, you almost lost me entirely here "__int8 pBuffer" (that makes no since). Then I glanced at the rest of the code, which almost(!) looks reasonable(?).

wookie182 wrote:
I tried a lot with GDI, but it doesn't work so far.

Sorry, but that is because you do not know what your are doing!

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: Drawing Text into a Bitmap with GDI

Anonymous9-Aug-05 2:44

Anonymous

9-Aug-05 2:44

Of course I am NOT using an uninitialized Pointer!!! There is some code before, which allocates memory and puts data to this buffer. I am just new to this GDI stuff and I believe there must be something wrong in these lines....

Re: Drawing Text into a Bitmap with GDI

John R. Shaw9-Aug-05 9:48

John R. Shaw

9-Aug-05 9:48

Simpilest way:
1) Create a display compatible dc.
2) Create a display compatible bitmap.
3) Select the bitmap into the dc.
4) Draw on the bitmap via the dc.
5) Select the old bitmap into the dc.
6) Release the dc you created.
7) You now have a bitmap with text on it.

Your code is a bit to complicated and you are drawing on 2 different DCs, drawing text is the same as drawing a line or a rectangle. All your drawing must be done on the SAME DC, after all that is where your drawing area is (the bitmap).

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Show bitmap on Button

Aditya Rao8-Aug-05 8:31

Aditya Rao

8-Aug-05 8:31

hi,
can anyone tell me how to show a bitmap or an icon on a button to be used in a dialog window( my application is a SDI app with view class derived from CFormView). i have added a bitmap as a resource.

thanks

aditya

Re: Show bitmap on Button

David Crow8-Aug-05 9:29

David Crow

8-Aug-05 9:29

See this article.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Show bitmap on Button

Ravi Bhavnani8-Aug-05 9:47

Ravi Bhavnani

8-Aug-05 9:47

This[^] article may help.

/ravi

My new year's resolution: 2048 x 1536
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Re: Show bitmap on Button

ThatsAlok8-Aug-05 18:32

ThatsAlok

8-Aug-05 18:32

Aditya Rao wrote:
how to show a bitmap or an icon on a button to be used in a dialog window

Yeap,Here it is :-
This![^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

WM_PAINT wackienss

Peter Weyzen8-Aug-05 8:19

Peter Weyzen

8-Aug-05 8:19

If WM_PAINT shows up with an hDC of 0 -- does that mean anything?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

Re: WM_PAINT wackienss

Jose Lamas Rios8-Aug-05 8:24

Jose Lamas Rios

8-Aug-05 8:24

Peter Weyzen wrote:
If WM_PAINT shows up with an hDC of 0 -- does that mean anything?

It means it's working as expected. As far as I know, WM_PAINT doesn't send an hDC; both wParam an lParam in that message are unused.

Maybe you mean some other message?

--
jlr
http://jlamas.blogspot.com/[^]

Re: WM_PAINT wackienss

Peter Weyzen8-Aug-05 8:31

Peter Weyzen

8-Aug-05 8:31

Thanks for the help -- I don't know all the details anymore. My boss came in wondering why this was happening...

I didn't have an answer for him...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

detecting a window in win32

celllllllll8-Aug-05 6:17

celllllllll

8-Aug-05 6:17

Hi,

I have written a program. It is doing what I expected but I am not able to detect a window within that program.

Is there any function in win32 or.... which can be used to detect that window?

Please help

Thanks

Preeti9

Re: detecting a window in win32

BlackDice8-Aug-05 6:26

BlackDice

8-Aug-05 6:26

I'm kinda confused as to what you're asking. Are you talking about something like FindWindow() or FindWindowEx()?

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BlackDice

Re: detecting a window in win32

celllllllll8-Aug-05 7:13

celllllllll

8-Aug-05 7:13

Thanks for replying...

Here's my code.

// TSCalibrate.cpp : Defines the entry point for the application.

#include "stdafx.h"
#include "CWin32AbsPointAPI.h"

void main ()
{
}

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)

{
CTouchScreenAPI* pTouch;
HWND hCalWin;
DWORD SYNCRONIZE;
DWORD procId;
HANDLE hProcess;
DWORD dwWaitResult;

pTouch = CTouchScreenAPI::Create();

if (pTouch)
{
if (pTouch->Init())

pTouch->Recalibrate();
else
MessageBox(NULL, "Created touchscreen interface OK, but Init() failed", "Info", MB_OK);

HWND hCalWin = ::FindWindow(pszABSPOINT_WND_CLASS_NAME, NULL);
GetWindowThreadProcessId(hCalWin, &procId); // retrieves the identifier of the thread that created this window.
hProcess = OpenProcess(SYNCHRONIZE, FALSE, procId); //returns a handle to an existing process object

/* SetForegroundWindow(hCalWin);
DWORD AllowSetForegroundWindow(procId);
if (AnyPopup())
{
DisplayWindow(hCalWin);
}
//AnyPopup();

while( true )
{
if( ! IsWindow(hCalWin) )
break; // window is gone;
// Sleep( 1000); // wait a second for window to close
};*/

while (1)
{
dwWaitResult = MsgWaitForMultipleObjects(1, &hProcess, FALSE, 30*1000, QS_ALLINPUT);
if (dwWaitResult == WAIT_OBJECT_0 + 1)
{
MSG xMsg;

while (PeekMessage(&xMsg, NULL, 0, 0, PM_REMOVE))
{

if (xMsg.message == WM_QUIT)
return 1;

TranslateMessage(&xMsg);
DispatchMessage(&xMsg);
}// end of PeekMessage while loop.

}
else if (dwWaitResult == WAIT_TIMEOUT)
{
SendMessage(hCalWin, WM_CLOSE, 0, 0);
//TerminateProcess(hProcess, 0);
break;
}
else dwWaitResult == WAIT_OBJECT_0;
{
//Calibration process completed;
break;
}
}

}
else
{
MessageBox(NULL, "Unable to get pointer to Touchscreen interface", "Info", MB_OK);
}

return 0;
}

This program is running calibration of a machine.
When I run this on command window, it does the calibration and the cursor in command window moves to the next line showing that calibration is done without detection.
I want to detect that window.

Please help
THanks

Preeti9

Re: detecting a window in win32

David Crow8-Aug-05 8:07

David Crow

8-Aug-05 8:07

Why do you have both main() and WinMain()?

I'm still not clear as to what window you are wanting to "detect" but the first thing that jumps out at me is that the calls to FindWindow(), GetWindowThreadProcessId(), and OpenProcess() could fail. Why are their return values not being checked? Could that be a reason why the window is not being detected?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: detecting a window in win32

celllllllll8-Aug-05 11:29

celllllllll

8-Aug-05 11:29

This Program is to detect the window. I associate this program with my calibration process in a machine.Calibration Process is working but it isn't able to detect this window. That's what I am looking for.
I know I need to add few lines in this code. But don't know what to add.

I really don't have any idea how to do this.

Help

Thanks

Preeti9

Re: detecting a window in win32

ThatsAlok8-Aug-05 18:18

ThatsAlok

8-Aug-05 18:18

Preeti9 wrote:
I know I need to add few lines in this code. But don't know what to add.

DO u Know the Name of the Window to DETECT?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: detecting a window in win32

David Crow9-Aug-05 2:27

David Crow

9-Aug-05 2:27

Preeti9 wrote:
This Program is to detect the window.

What window? The window that belongs to your program, or a window that belongs to some other process? What does the "calibration process in a machine" have to do with any of this? Is that related to this mysterious window somehow?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Hiding ScrollBars

raybert8-Aug-05 5:40

raybert

8-Aug-05 5:40

I am using a child frame window to display a view. The child frame window can be resized and when the frame is made smaller than the view scroll bars are appearing and ruining the effect that I want to achieve. The view was created in the resource editor and is of type CFormView. The frame is of type CMDIChildWnd. I have tried a bunch of the following combinations and this is where I am at...

ModifyStyle(WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_SYSMENU | WS_THICKFRAME | WS_CAPTION | WS_BORDER | WS_HSCROLL, 0, SWP_NOMOVE);
ModifyStyleEx(WS_EX_STATICEDGE | WS_EX_RIGHTSCROLLBAR, 0, SWP_NOMOVE);

Doesn't work

Any insight???

Re: Hiding ScrollBars

Jose Lamas Rios8-Aug-05 6:41

Jose Lamas Rios

8-Aug-05 6:41

raybert wrote:
when the frame is made smaller than the view scroll bars are appearing and ruining the effect that I want to achieve.

What is that effect? You might handle WM_SIZE messages in your view and call SetScrollSizes from the corresponding OnSize function. But what to do exactly might depend on what you are trying to achieve.

--
jlr
http://jlamas.blogspot.com/[^]

Re: Hiding ScrollBars

raybert8-Aug-05 8:04

raybert

8-Aug-05 8:04

Thank you for your response. I am actually asking this question for a co-worker so I needed to find out what effect he wanted. Basically, it is whenever the child window is resized to a smaller size he does not want the vertical or horizontal scrollbars to appear. I hope that makes some sense.

Re: Hiding ScrollBars

Jose Lamas Rios8-Aug-05 8:17

Jose Lamas Rios

8-Aug-05 8:17

raybert wrote:
I am actually asking this question for a co-worker

raybert wrote:
it is whenever the child window is resized to a smaller size he does not want the vertical or horizontal scrollbars to appear

raybert wrote:
I hope that makes some sense.

Not much more than the original question, but never mind. If your co-worker is interested, tell him/her to post him/herself to the forum, an explain a bit more.

--
jlr
http://jlamas.blogspot.com/[^]

D3DXCreateTextureFromFile and CBitmap

akira328-Aug-05 4:58

akira32

8-Aug-05 4:58

D3DXCreateTextureFromFile(g_pD3DDevice,"Texture.bmp",&g_pTexture);
如果要把讀.bmp改成讀CBitmap的話,要如何改?
How to I change that input .bmp replace as input CBitmap For CreateTexture?
Becuse I want to use my file format.

OleControl crashes i.e. on shutdown

Ed Deighton8-Aug-05 4:45

Ed Deighton

8-Aug-05 4:45

I have an mfc ActiveX control. It exports a few functions and uses an COleControl for its main window. Basically on this machine I have running win2K it crashes when closing down.

The crash occurs in AfxWinProc due to the module state returning a null CWnd pointer given the hwnd - the message is WM_DESTROY. Somehow MFC has gone and dumped all its hWnd to CWnd* maps and the call to AfxWinProc causes the whole thing to just crash.

Unbelievably MFC doesnt simply test for a null CWnd pointer, it insists on just ASSERTing it like mad and trying to carry on regardless.

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