C / C++ / MFC Discussion Boards

Rowan Seymour26-May-03 4:00

26-May-03 4:00

I'm coding an MFC MDI doc/view simple sound editor called Asaph.

There are 2 menu resources: the IDR_MAINFRAME one for when there are no open docs, and the IDR_ASAPHTYPE one used when a doc is open.
I want to be able to dynamically add menu items (using CMenu::InsertMenu()) for things like plugins, to the IDR_ASAPHTYPE menu.

Even tho the applicatiopn starts with a new blank doc, when CMainFrame::OnCreate() is called, GetMenu() still returns the CMenu created from IDR_MAINFRAME.

When is the doc menu loaded and how I can I access it to add the items ?

My only idea so far is to do it from the the document class in the first call to OnNewDocument() or OnOpenDocument() but that seems like a bit of a hack fix.

Cheers, Rowan

Getting version information from a resource

Trollslayer26-May-03 3:35

Trollslayer

26-May-03 3:35

In order to write registry keys etc., I want t use the details entered in the version part of a resource (such as CompanyName).
The question is, how do I read this ?
Thanks.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Getting version information from a resource

Michael Dunn26-May-03 4:30

Michael Dunn

26-May-03 4:30

Here you go Smile | :)

// GetDllVersion - Returns version # in a string: "1.2.3.4"
// Reads the ProductVersion info block from the given file and returns it in sProductVersion.
// Return value is true/false for success/failure.
 
bool GetDllVersion ( LPTSTR szDllFilename, std::string& sProductVersion )
{
DWORD dwHandle, dwInfoSize;
BYTE* pBuffer;
void* pvVersion;
UINT  uBufLen;
 
    dwInfoSize = GetFileVersionInfoSize ( szDllFilename, &dwHandle );
 
    if ( 0 == dwInfoSize )
        return false;
 
    pBuffer = new BYTE [dwInfoSize];
 
    if ( NULL == pBuffer )
        return false;
 
__try
    {
    if ( 0 == GetFileVersionInfo ( szDllFilename, dwHandle, dwInfoSize, pBuffer
        return false;
 
    if ( 0 == VerQueryValue ( pBuffer, _T("\\StringFileInfo\\040904B0\\ProductVersion"),
                              &pvVersion, &uBufLen ))
        return false;
 
    sProductVersion = (LPCTSTR) pvVersion;
    }
__finally
    {
    delete [] pBuffer;
    }
 
    return true;
}

--Mike--
Latest blog entry: *drool* (Alyson) [May 10]
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me

Re: Getting version information from a resource

Trollslayer26-May-03 5:04

Trollslayer

26-May-03 5:04

Thanks Mike, but that is to get the version number of an external DLL.
I was trying to avoid redundant information in my project by reading the CompanyName string from the resource and using that to build the registry key entry. This would include ProductName.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Getting version information from a resource

Michael Dunn26-May-03 9:55

Michael Dunn

26-May-03 9:55

That's what the code does, reads the version resource from a binary (it doesn't have to be a DLL, you can pass the filename of your EXE). Just change the "ProductVersion" part in the VerQueryValue() call to the field you want to read.

--Mike--
Latest blog entry: *drool* (Alyson) [May 10]
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me

File error checking.

⁷³Zeppelin26-May-03 3:06

⁷³Zeppelin

26-May-03 3:06

Is this a valid check to see if a file has been opened?

// Save original Node data
ofstream NodeOrig;
NodeOrig.open("NodeOrig.txt", ios::out);

if ( !NodeOrig.is_open() )
    throw "Could not open original node data file.\n";

Re: File error checking.

Rage26-May-03 3:32

Rage

26-May-03 3:32

If you are sure the target file path is correct and the file not corrupted, then Yes.

~RaGE();

Re: File error checking.

⁷³Zeppelin26-May-03 3:37

⁷³Zeppelin

26-May-03 3:37

Maybe this is a bit more robust?

// Save original Node data
ofstream NodeOrig;
NodeOrig.open("NodeOrig.txt", ios::out);

if ( NodeOrig.fail() )
    throw "Could not open original node data file.\n";

or maybe I should be checking flags?
Eg:

if(FileStream.rdstate() == ios::eofbit)

      cout << "End of file!\n";

if(FileStream.rdstate() == ios::badbit)

      cout << "Fatal I/O error!\n";

if(FileStream.rdstate() == ios::failbit)

      cout << "Non-fatal I/O error!\n";

if(FileStream.rdstate() == ios::goodbit)

      cout << "No errors!\n";

Re: File error checking.

Andrew Walker26-May-03 3:39

Andrew Walker

26-May-03 3:39

Maybe just?

if(FileStream.fail())
{
  throw ...
}

How to owner-draw the titlebar of one SDI ?

scgy94_jiang26-May-03 2:47

scgy94_jiang

26-May-03 2:47

the problem is : where should i put the lines of drawing ? in OnPaint() only? what else should i do ?

i wish to draw the titlebar of one SDI program. but i met some problems.

here is how i do it as following:

i add lines in the CMainFrame::OnPaint() :

	<br />
CFrameWnd::OnPaint();<br />
<br />
	if (IsIconic()) return;<br />
<br />
	RECT stRect1;<br />
<br />
        // Get the coordinates of the window on the screen<br />
        ::GetWindowRect(m_hWnd, &stRect1);<br />
<br />
	CRgn m_rgn0;<br />
        m_rgn0.CreateRectRgn(0,8,stRect1.right-stRect1.left,stRect1.bottom-                             stRect1.top);<br />
<br />
        SetWindowRgn(m_rgn0,1);<br />
<br />
	<br />
	RECT stRect;<br />
<br />
	CRect rect;<br />
<br />
<br />
	CDC *pDC;<br />
	pDC = GetWindowDC();<br />
	<br />
<br />
<br />
<br />
        // Get the coordinates of the window on the screen<br />
        ::GetWindowRect(m_hWnd, &stRect);<br />
<br />
	<br />
<br />
    rect.SetRect(0,0,stRect.right - stRect.left,stRect.bottom - stRect.top);<br />
<br />
    // Get a handle to the window's device context<br />
    HDC hDC = ::GetWindowDC(m_hWnd);<br />
<br />
    HPEN hPen;<br />
    hPen = CreatePen(PS_INSIDEFRAME, 1* GetSystemMetrics(SM_CXBORDER), <br />
        RGB(123, 200, 243));<br />
<br />
	CPen pen;<br />
<br />
	pen.CreatePen(PS_INSIDEFRAME, 1* GetSystemMetrics(SM_CXBORDER), <br />
        RGB(123, 220, 233));<br />
<br />
<br />
	pDC->SelectObject(&pen);<br />
<br />
	//CBrush brush;<br />
<br />
	<br />
<br />
	<br />
    // Draw the rectangle around the window<br />
    HPEN   hOldPen   = (HPEN)SelectObject(hDC, hPen);<br />
    HBRUSH hOldBrush = (HBRUSH)SelectObject(hDC, GetStockObject(NULL_BRUSH));<br />
<br />
	stRect.bottom = stRect.bottom-stRect.top;<br />
	stRect.right = stRect.right-stRect.left;<br />
<br />
	int btm = stRect.bottom;<br />
	<br />
	CRgn m_rgn6,m_rgn5,m_rgn7;<br />
<br />
	m_rgn6.CreateRectRgn(0,0,4,stRect.bottom);<br />
	m_rgn5.CreateRectRgn(stRect.right -4,0,stRect.right,stRect.bottom);<br />
	m_rgn7.CreateRectRgn(0,stRect.bottom-4,stRect.right,stRect.bottom);<br />
<br />
	stRect.left = 0 ;<br />
	stRect.top = 0 ;<br />
	stRect.bottom = 29;<br />
<br />
	<br />
	<br />
	m_rgn2.CreateRectRgn(stRect.left,stRect.top,stRect.right,stRect.bottom);<br />
	//pDC->SelectObject(&brush);<br />
<br />
	m_rgn2.CombineRgn(&m_rgn2,&m_rgn,RGN_DIFF);<br />
	m_rgn2.CombineRgn(&m_rgn2,&m_rgn6,RGN_OR);<br />
	m_rgn2.CombineRgn(&m_rgn2,&m_rgn5,RGN_OR);<br />
	m_rgn2.CombineRgn(&m_rgn2,&m_rgn7,RGN_OR);<br />
<br />
	SelectClipRgn(hDC,HRGN(m_rgn2));<br />
<br />
<br />
	CBrush brush;<br />
<br />
	brush.CreateSolidBrush(RGB(255,255,255));<br />
	//pDC->SelectClipRgn(&m_rgn2,RGN_AND);<br />
	//brush.CreateStockObject(NULL_BRUSH);<br />
	<br />
	<br />
<br />
	//pDC->FillRgn(&m_rgn2,&brush);<br />
<br />
	FillRgn(hDC,HRGN(m_rgn2),HBRUSH(brush));<br />
<br />
	brush.CreateStockObject(NULL_BRUSH);<br />
<br />
	int i = 0;<br />
<br />
	for (i; i < btm;i)<br />
	{<br />
		MoveToEx(hDC,0,i,NULL);<br />
		LineTo(hDC,stRect.right,i);	<br />
		i += 2;<br />
	}<br />
<br />
    hPen = CreatePen(PS_INSIDEFRAME, 2* GetSystemMetrics(SM_CXBORDER), <br />
     RGB(33, 120, 120));<br />
<br />
	SelectObject(hDC, hPen);<br />
<br />
	MoveToEx(hDC,2,28,NULL);<br />
	LineTo(hDC,stRect.right-2,28);<br />
<br />
<br />
	MoveToEx(hDC,3,28,NULL);<br />
	LineTo(hDC,3,btm-3);<br />
	<br />
	MoveToEx(hDC,stRect.right-3,28,NULL);<br />
	LineTo(hDC,stRect.right-3,btm-3);<br />
<br />
	MoveToEx(hDC,3,btm-4,NULL);<br />
	LineTo(hDC,stRect.right-3,btm-4);<br />
<br />
<br />
	MoveToEx(hDC,0,0,NULL);<br />
	LineTo(hDC,0,btm);<br />
<br />
	MoveToEx(hDC,stRect.right,0,NULL);<br />
	LineTo(hDC,stRect.right,btm);<br />
<br />
<br />
    //Give the window its device context back, and destroy our pen<br />
    ::ReleaseDC(m_hWnd,hDC);<br />
<br />
    SelectObject(hDC, hOldPen);<br />
    SelectObject(hDC, hOldBrush);<br />
<br />
    DeleteObject(hPen);<br />
    DeleteObject(hDC);

it works well at most times, but when the window lost focus or reactiviate, it doesn't redraw. when u drag this window, it doesn't redraw after it moves from top-outside area back, either.
Jiang

What message should i handle to perform this?

scgy94_jiang26-May-03 2:58

scgy94_jiang

26-May-03 2:58

ast

Re: What message should i handle to perform this?

Rage26-May-03 3:40

Rage

26-May-03 3:40

Try also the invalidate in OnEraseBackground() only, this should catch the three previous cases.

~RaGE();

Re: How to owner-draw the titlebar of one SDI ?

Rage26-May-03 3:38

Rage

26-May-03 3:38

Try to Invalidate() your window titlebar rect in OnActivate(), OnKillFocus() and OnMoving()

~RaGE();

Re: How to owner-draw the titlebar of one SDI ?

John R. Shaw26-May-03 9:33

John R. Shaw

26-May-03 9:33

OnPaint() is used to paint the client area. The title bar is a non-client area. Look up (search) WM_NCPAINT or OnNcPaint(). You could also try searching for "owner drawn title bar" here or on the www.

Trust in the code Luke. Yea right!

zip, docfile?

novachen26-May-03 2:21

novachen

26-May-03 2:21

I am designing a software to collect and organize web pages catched from internet and the drafts created user himself. In my first model, i store them in file system. But there are so many little gif/jpg that will waste disk space and not easy to manage. I hope there is a way to pack them into a single file or database.
The first thing into my mind is a zip file, but i dont know whether it is efficient enough for delete and insert frequently.
The second one is a ole docfile, it is said to be a file with directory structure inside. But i have very limit knowledge about it, hope somebody can tell me whether it is fit for my usage.
The third one is some object databases, i know zope is a good one, but it is build on python. Hope you can introduce some good c/c++ object database for me.
Thank you!

Re: zip, docfile?

Peter Weyzen26-May-03 18:54

Peter Weyzen

26-May-03 18:54

I know something about docfile. A DOCFile is literally a file-system inside a file. There's 2 classes to know about:
* IStorage -- acts like a directory
* IStream -- acts like a file.

(1) Create a DOCFILE with a method like: StgCreateDocfile(). This allocates your root IStorage object.

(2) Create an IStream for each file you want stored. Use IStorage::CreateStream().

if you want to create a directory within the file, then use IStorage::CreateStorage().

Make sure to call the Release() method on each object. Since this is COM, you cannot delete the objects you request. You must release() them and hope they clean themselves up.

DOCFILE's do not self compact themselves. To do compaction of the file, I think you have to just create a new docfile, and use IStorage::CopyTo to copy to the new one.

It's been about 5 years since I've done this, but I assume nothing here has changed.

-p

Problem mapping WM_NCHITTEST message

Anonymous26-May-03 2:17

Anonymous

26-May-03 2:17

I have a problem mapping the WM_NCHITTEST message.
In my App I have derived a class from CStatic in order
to develop some specific functionalities (I also need
to know when the mouse is on my CStatic control and where
it is).
So I'd like to map WM_NCHITTEST message into my derived
class using the afx_msg UINT OnNcHitTest(CPoint point)
method.

I've associated an instance of my class to a CStatic control being part of the main window and using the Spy++
application I have seen that WM_NCHITTEST message is sent
to my control but OnNcHitTest method is not called !!!

Where is the problem ?
Thanks a lot !!!

Re: Problem mapping WM_NCHITTEST message

Rage26-May-03 2:30

Rage

26-May-03 2:30

You have to use SetCapture() first.

~RaGE();

Re: Problem mapping WM_NCHITTEST message

Anonymous26-May-03 3:06

Anonymous

26-May-03 3:06

But... if I use SetCapture all buttons in the main window
doesn't works !!! Is it true ? I've seen this...

Re: Problem mapping WM_NCHITTEST message

Rage26-May-03 3:31

Rage

26-May-03 3:31

Yes, that's true. I think you should better use afx_msg void OnNcMouseMove( UINT nHitTest, CPoint point ); and afx_msg void OnNcLButtonDown( UINT nHitTest, CPoint point ); which, as for them, do not require capture of the mouse.

~RaGE();

CObArray troubles

Anonymous26-May-03 2:01

Anonymous

26-May-03 2:01

Hi All,
I'm having a bit of trouble adding derived objects of CObject to a CObArray object. I get the following error:
error C2243: 'type cast' : conversion from 'DoobyObj *__w64 ' to 'CObject *' exists, but is inaccessible

This is just a test for a later prject (hence the stupid class name). I need the DoobyObj class to inherit from CObject class so that I can serialize the CObArray object.
The error occurs on the Add line:

void SerObject::addDoobyObject(DoobyObj dO)
{
obaObjects.Add(&dO); //CObArray
resetIndex();
}

Here is the definition of DoobyObj:

class DoobyObj : CObject
{
public:
DECLARE_SERIAL( DoobyObj )
DoobyObj();
void Serialize(CArchive& archive );
CString dooby;
};

Can anyone solve my problem??
Thanks,
Donal

Re: CObArray troubles

Ryan Binns26-May-03 2:34

Ryan Binns

26-May-03 2:34

Are you compiling for 64-bit Windows, by any chance? I'm not sure MFC works with 64-bit Windows yet... It might, but that may be the reason

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Re: CObArray troubles

Anonymous26-May-03 5:09

Anonymous

26-May-03 5:09

No, just windows 2K.
Do I need to setup some type of conversion method in my CObject derived calss?

Re: CObArray troubles

Ryan Binns5-Jun-03 23:12

Ryan Binns

5-Jun-03 23:12

Sorry for the delay. I haven't been able to access CP for almost two weeks Frown | :(

I should have picked up this before...

You are inheriting CObject as private, which implicitly makes any CObject methods private. This means that CArray can not access the implicit CObject* conversion because it is private.

Instead of

class DoobyObj : CObject

use

class DoobyObj : public CObject

This should fix the problem Smile | :)

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

DirectSound Buffer->Lock Error

Miepmuts26-May-03 1:48

Miepmuts

26-May-03 1:48

Hello everybody,

I hope you can help me with my problem.
At this moment I am developping a project in DirectSound. I need to play a wave file. Because of future enhancements the wave file is played with DirectSound.

I use 3D buffers and the extended waveformat. All initialisation goes well, but when I try to lock the buffer the error DSERR_PRIOLEVELNEEDED is returned. I checked the SetCooperativeLevel function and that returns DS_OK.

The code I use for those two functions look like this:

<br />
MainhWnd = GetSafeHwnd();<br />
hr = m_pDS->SetCooperativeLevel(MainhWnd, DSSCL_NORMAL);<br />
<br />
....<br />
<br />
VOID* pbData = NULL;<br />
VOID* pbData2 = NULL;<br />
DWORD dwLength;<br />
DWORD dwLength2;<br />
int lPos=0;<br />
DWORD m_dwBufferBytes;<br />
<br />
hr= m_pDSBuffer->Lock(lPos, m_dwBufferBytes, &pbData, &dwLength, &pbData2, &dwLength2, 0);<br />

Does anyone know what the problem is, or how I can solve this.

Thanks in advance,

Miepmuts

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