C / C++ / MFC

Re: Can a CEdit control do this?.....

27-Jul-02 10:01

I want to populate an edit control with a paragraph. The only way to populate a multiline edit I found is to have
\r\n at the end of each line, so obviously it doesnt look like a paragraph. Do I have to use a CRichEdit, or will my poor CEdit do the task?

Thanks,
ns

peterchen27-Jul-02 10:40

peterchen

27-Jul-02 10:40

You get automatic text wrapping in en edit control when the ES_AUTOHSCROLL style is not set. this way, you can save your precious \r\n's for the paragraph breaks.

Other than that, you would need to use the RickEdit.

You don't need to sleep to see a nightmare Anne Clark [sighist]

Task Bar Funtionality Replication

gekoscan27-Jul-02 9:57

gekoscan

27-Jul-02 9:57

What's up coders... I am interested in changing the size of the shelltraywnd so that I can have a window similar to the task bar but my own which sits at the top of the screen. Then when any other window is maximized it will think that the bottom of my new task bar or window is the top of the screen and won't go past it.

So in reality I wanna change the height that all windows maximize to on the screen. Right now the go to the top of the screen but I would like to be able to change this so that they only maximize to 200 pixels below the screen and then I can fit an application in there so it sorta simulates what the task bar is doing if it were at the top of the screen.

If anyone could help me or give me some hints as to what this would involve that would be awesome.

Peace Eek! | :eek:

Re: Task Bar Funtionality Replication

Michael P Butler27-Jul-02 10:16

Michael P Butler

27-Jul-02 10:16

http://www.microsoft.com/msj/defaulttop.asp?page=/msj/archive/s274.htm[^]

Michael Smile | :)

Time flies like an arrow. Fruit flies like a banana

message encapsulation

detect27-Jul-02 8:16

detect

27-Jul-02 8:16

i , all guys here.

I confront a handicap in my VC study , and expect your help.
Now , I am writting a class inheriting CWnd . and I want my class have the function to respond the UI message such as mousedown or keydown etc.
Have some master-hands can solve this problem . If you have some sample classes that can show to me ,please email to me :polosheng@yeah.net. thanks.

Another , I have made a sample class . it can pass the complier,but when linked ,the exe file didn't respond the lbuttondown message.And here is the code. Conld you give me some suggestions?
------------------------------------------------------------------------

#if !defined(AFX_MYMSG_H__F9CB9441_F91B_11D1_8610_0040055C08D9__INCLUDED_)
#define AFX_MYMSG_H__F9CB9441_F91B_11D1_8610_0040055C08D9__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
// MyMsg.h : header file
//
#include <afxwin.h>
/////////////////////////////////////////////////////////////////////////////
// CMyMsg CWnd

class CMyMsg : public CWnd
{
DECLARE_DYNAMIC(CMyMsg)

public:
static WNDPROC m_wndProc;

public:
CMyMsg();

private:
//{{AFX_MSG(CFolderDialog)
// NOTE - the ClassWizard will add and remove member functions here.
afx_msg void OnLButtonDown( UINT nFlags, CPoint point );
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_MYMSG_H__F9CB9441_F91B_11D1_8610_0040055C08D9__INCLUDED_)

------------------------------------------------------------------------------------------------------------
//implement file
#include "MyMsg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMyMsg

IMPLEMENT_DYNAMIC(CMyMsg,CWnd)

WNDPROC CMyMsg::m_wndProc = NULL;

BEGIN_MESSAGE_MAP(CMyMsg , CWnd)
//{{AFX_MSG_MAP(CFolderDialog)
// NOTE - the ClassWizard will add and remove mapping macros here.
ON_WM_LBUTTONDOWN()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

LRESULT CALLBACK WindowProcNew(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
return CallWindowProc(CMyMsg::m_wndProc, hwnd, message, wParam, lParam);
}
CMyMsg::CMyMsg()
{
}
void CMyMsg::OnLButtonDown( UINT nFlags, CPoint point )
{
::Beep(1000,1000);
}

ignorance

Re: message encapsulation

detect29-Jul-02 4:35

detect

29-Jul-02 4:35

Anybody know it ?
please give me some advise . Thank you

How To Write Code To Change The Printer Resolution

ooosawaddee327-Jul-02 7:43

ooosawaddee3

27-Jul-02 7:43

If my printer set the resolution at 300 dpi and I want to print at the other resolution. How to write code to do that?

Re: How To Write Code To Change The Printer Resolution

l a u r e n28-Jul-02 0:35

l a u r e n

28-Jul-02 0:35

does not changing the scaling mode of the print dc affect the resolution of the output?
if not then maybe you have to send some printer specific codes to the device before printing

"... and so i said to him ... if it don't dance (or code) and you can't eat it either f**k it or throw it away"
sonork: 100.18128 8028finder.com

Re: How To Write Code To Change The Printer Resolution

Branislav28-Jul-02 4:38

Branislav

28-Jul-02 4:38

try to call printer dc (structure) to see printer's characteristics. if it doesn't sucessful you must change printer driver.
Good lack Smile | :)

index not within bounds? Help !!

nss27-Jul-02 7:18

27-Jul-02 7:18

I tried:

<br />
void CTrain1View::OnReadin() <br />
{<br />
	CString sWriteText; //Where the text will be streamed from<br />
	sWriteText="Rich text is shown here in sample project";<br />
<br />
	// This is hard-coded for example purposes. It is likely this would<br />
	// be read from file or another source.<br />
	EDITSTREAM es;<br />
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function<br />
	es.pfnCallback = MEditStreamInCallback; // Specify the pointer to the callback function<br />
<br />
	m_richedit.StreamIn(SF_RTF,es); // Perform the streaming<br />
}<br />
<br />
<br />
<br />
  DWORD __stdcall MEditStreamInCallback(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)<br />
{<br />
	CString *psBuffer = (CString *)dwCookie;<br />
<br />
	if (cb < psBuffer->GetLength()) cb = psBuffer->GetLength();<br />
<br />
	for (int i=0;i<cb;i++)<br />
	{<br />
		*(pbBuff+i) = psBuffer->GetAt(i);<br />
	}<br />
<br />
	*pcb = cb;<br />
<br />
	*psBuffer = psBuffer->Mid(cb);<br />
<br />
	return 0;<br />
}<br />
<br />

but this did not populate the richedit control. Instead it crashed precisely at :

    for (int i=0;i<cb;i++)<br />
{<br />
    *(pbBuff+i) = psBuffer->GetAt(i);<br />
}<br />

In the debug window I could see that the entire string was retrieved, and it entered the for loop even after that. Then crashed. so is it an indexing problem? How to fix it?

Thanks,
ns

nss27-Jul-02 8:01

27-Jul-02 8:01

From the debugger, for some reason (The string is just "Rich text" with length of 9) ,I see that cb =4092, and MSDN said that the loop index is to be less than GetLength = 9. No wonder its crashing. But what is this cb thats being passed in? Helllpp!
Thank you much,
ns

Ravi Bhavnani27-Jul-02 8:02

27-Jul-02 8:02

The for loop looks bad. Did you forget to include the condition and the increment in your post? In any case, you can simply copy a CString into a char array (as it looks like what you want to do) by doing:

strcpy (pbBuff, *psBuffer->GetBuffer(0));
*psBuffer->ReleaseBuffer();

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

nss27-Jul-02 8:40

27-Jul-02 8:40

Wonder why the loop got mangled in the mail

 DWORD __stdcall MEditStreamInCallback(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)<br />
{<br />
	CString *psBuffer = (CString *)dwCookie;<br />
	TRACE(*psBuffer);<br />
TRACE("cb is %d",cb);  //debugger says its 4092<br />
<br />
TRACE("getlength is %d",psBuffer->GetLength()); debugger says its 9, correct<br />
<br />
<br />
<br />
	//if (cb < psBuffer->GetLength()) cb = psBuffer->GetLength(); //never gets done cause cb is so big!<br />
<br />
//MSDN says loop until length-1, so I forcibly set<br />
<br />
cb =9;<br />
<br />
	TRACE("length is %d",cb);<br />
<br />
	for (int i=0;i<cb;i++)<br />
<br />
	<br />
	{<br />
<br />
			TRACE("index i is %d", i);<br />
		*(pbBuff+i) = psBuffer->GetAt(i);<br />
	}<br />
<br />
	*pcb = cb;  \\this looks weird. cb never changes....not that I can see<br />
<br />
	*psBuffer = psBuffer->Mid(cb);<br />
<br />
	return 0;<br />
}

I'm trying your idea now...
Thanks. Smile | :)

yikes! It did it again!!

nss27-Jul-02 8:42

Re: yikes! It did it again!!

27-Jul-02 8:42

The for loop is

for (int i=0;i

nss27-Jul-02 8:43

Re: yikes! It did it again!!

27-Jul-02 8:43

i=0
i less than cb
increment i

Aaargh!

Ravi Bhavnani27-Jul-02 8:45

Re: yikes! It did it again!!

27-Jul-02 8:45

That's what I thought. That's a simple strcpy, so my suggestion should work.

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

Ravi Bhavnani27-Jul-02 8:44

27-Jul-02 8:44

You need to surround your code with <pre> </pre> Smile | :)

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

\n in TRACE()

Ravi Bhavnani27-Jul-02 8:58

27-Jul-02 8:58

Don't forget to include "\n" at the end of your TRACE() string, otherwise you may need to cross the Atlantic to view the debugger output. Highly inconvenient.

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

Bill S27-Jul-02 8:47

Bill S

27-Jul-02 8:47

Try this:

DWORD CALLBACK _LoadRtfCallback(
DWORD dwCookie, // (in) pointer to the string
LPBYTE pbBuff, // (in) pointer to the destination buffer
LONG cb, // (in) size in bytes of the destination buffer
LONG FAR *pcb // (out) number of bytes transfered
)
{
LPCTSTR pszMsg = (LPCTSTR)dwCookie;

// number of bytes to copy
*pcb = _tcslen( pszMsg ) * sizeof(TCHAR);

// limiting it up to the buffer's size
if( *pcb > cb )
*pcb = cb;

// copying the string to the buffer
memcpy( pbBuff, pszMsg, *pcb );

// advancing to the end of the string
pszMsg += *pcb / sizeof(TCHAR);

// if it's the end of the string, returns NULL;
// otherwise, returns a pointer to the next char to transfer as the cookie
return ( *pszMsg != '\0' ) ? (DWORD)pszMsg : NULL;
}

nss28-Jul-02 6:54

28-Jul-02 6:54

I am wondering - in CRichEditStream::_LoadRtfCallback, is CRichEditStream replaced by the name of my view class? Why does this callback have a different signature type from what I see in the MSDN:

DWORD __stdcall MEditStreamOutCallback(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)

You have

DWORD CALLBACK _LoadRtfCallback(
DWORD dwCookie, // (in) pointer to the string
LPBYTE pbBuff, // (in) pointer to the destination buffer
LONG cb, // (in) size in bytes of the destination buffer
LONG FAR *pcb // (out) number of bytes transfered
)

Are these two forms of the function declaration equivalent? Can I use your function in conjunction with:

void CRichEgView::OnReadin() 
{
	CString sWriteText; //Where the text will be streamed from
	sWriteText="Rich text is shown here in sample project";

	// This is hard-coded for example purposes. It is likely this would
	// be read from file or another source.
	EDITSTREAM es;
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function
	es.pfnCallback = MEditStreamInCallback; // Specify the pointer to the callback function

	GetRichEditCtrl().StreamIn(SF_RTF,es); // Perform the streaming
}

What will this line be when used with your function:

es.pfnCallback = MEditStreamInCallback; // Specify the pointer to the callback function

Sorry if my questions sound naive Smile | :)

Thanks,
ns

trying out your idea

nss28-Jul-02 7:34

28-Jul-02 7:34

Here is how I used it, -it ran but the box remained stubbornly blank!

void CTrain1View::OnReadin() 
{
	CString sWriteText; //Where the text will be streamed from
	sWriteText="Rich text is shown here in sample project";

	// This is hard-coded for example purposes. It is likely this would
	// be read from file or another source.
	EDITSTREAM es;
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function
	es.pfnCallback = _LoadRtfCallback; // Specify the pointer to the callback function

	m_richedit.StreamIn(SF_RTF,es); // Perform the streaming
}

DWORD CALLBACK _LoadRtfCallback(
   DWORD dwCookie,      // (in) pointer to the string
   LPBYTE pbBuff,       // (in) pointer to the destination buffer
   LONG cb,             // (in) size in bytes of the destination buffer
   LONG FAR *pcb        // (out) number of bytes transfered
   )
{
   LPCTSTR pszMsg = (LPCTSTR)dwCookie;

   // number of bytes to copy
   *pcb = _tcslen( pszMsg ) * sizeof(TCHAR);

   // limiting it up to the buffer's size
   if( *pcb > cb )
      *pcb = cb;

   // copying the string to the buffer
   memcpy( pbBuff, pszMsg, *pcb );

   // advancing to the end of the string
   pszMsg += *pcb / sizeof(TCHAR);

   // if it's the end of the string, returns NULL;
   // otherwise, returns a pointer to the next char to transfer as the cookie
   return ( *pszMsg != '\0' ) ? (DWORD)pszMsg : NULL;
}