ATL CImageList - C / C++ / MFC Discussion Boards

Guys,
www.mindcracker.com is a new developers web site. You are most welcome to contribute and post your articles.

Thanks

Does any one know how to toggle between document templates
with a toolbar button or menu item? I what to go between a
single view and splitter view without having to do file /new
then picking from the list.

Please Help!
Any suggestion will be greatly appreicated

Thanks

HI,

I used CHtmlView to make a custom browser..

It works well..not powerful but basic functions and methods are enough..

One Problem..

I made OnScreen Keyboard..

But I can't route keyboard message to edit box that dynamically created in IE COM..

When clinking the Onscreen Keyboard, the input focus is moved to button of keyboard..

Worse it is when there are lots of edit boxes in Web page..

How can I route the keyboard message correctly?

OR

How can I get the handle of edit box in IE COM that has focus?

Thank you in advance!!!

-Ray

Hello!

I' m connecting Visual Fox Pro database with my VC program through ODBC.
When i open the recordset i get the error message "ODBC does not support dynasets".
If select Snapshot, it works fine.
I looked at MSDN: "PRB: Visual C++ 1.5 ODBC Drivers Don't Support Dynasets", but 'm not getting the right way.

Would u plz tell me how i can solve this problem.

Thanx
Hassan

Just an idea:
Are you using Cursors ? I think the cursor-library is necessary for snapshots, but dynasets don´t like it. So if you want to use dynasets, disable the cursor-librabry...

Hi all,

I'm new to WinSock. Please, if anyone know where I can find source code of how to use WSAAsyncGetHostByAddr() in an VC++/MFC application send me a mail.
I found an example of using WSAAsyncGetHostByAddr() in C/SDK app. but I have an VC++/MFC app. and I wish to update it with WSAAsyncGetHostByAddr().

Thank you,
Mileta.

Hi,
I hope is usefull to you:

Add this lines bellow in your InitInstance method of your application and you can use any WSA.. function .

WSADATA wsa;
WSAStartup(0x0101, &wsa);

in ExitInstance():

WSACleanup();

and
#include <winsock.h> in your stdafx.h file

also you must link your application with
wsock32.lib

It doesn't matter if your application is build with or without MFC

Best Regards,
/REMUS

Hello,

I'm using the CImageList ATL helper classes defined in the "ATLControls.h" file. When I try to build my project
I have link error.

here is the code where I'm using the CImageList object:

/////////////////////////////////////////////////////////////////////////////
//
LRESULT CParametersDlg::OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
USES_CONVERSION;

//Initialize the editText name control.
CWindow wndName(GetDlgItem(IDC_ELEMENT_NAME));
wndName.SetWindowText(OLE2T(m_controlName.m_str));

//Initialize the comboxe color control
RECT rect= { 90, 130, 280, 210 };
m_comboBoxEx.Create(this->m_hWnd, rect, NULL, WS_CHILD | WS_VISIBLE | WS_BORDER |
WS_TABSTOP | WS_VSCROLL | CBS_DROPDOWNLIST);
m_comboBoxEx.SetExtendedUI();

COMBOBOXEXITEM cbei;
cbei.mask = CBEIF_TEXT | CBEIF_INDENT | CBEIF_IMAGE | CBEIF_SELECTEDIMAGE;

int sizeOfItem = sizeof( Gobal_ItemInfoArray ) / sizeof( Gobal_ItemInfoArray[0] );
for( int index = 0; index < sizeOfItem; index++ )
{
CComboBoxExColor& comboInfo = Gobal_ItemInfoArray[index];

cbei.iItem = index;
cbei.pszText = comboInfo.m_przText;
cbei.cchTextMax = sizeof(comboInfo.m_przText);
cbei.iImage = comboInfo.m_iImage;
cbei.iSelectedImage = comboInfo.m_iSelected;
cbei.iIndent = comboInfo.m_iIdent;

m_comboBoxEx.InsertItem(&cbei);
}
CImageList imageList;
imageList.Create( IDB_ORUS_COLOR_BITMAP, 16, 1, ILC_COLOR);
m_comboBoxEx.SetImageList( imageList.m_hImageList );

return 1; // Let the system set the focus
}

/////////////////////////////////////////////////////////////////////

hereis the link error message that I received:

Linking...
Creating library Debug/OrusControlsServer.lib and object Debug/OrusControlsServer.exp
ParametersDlg.obj : error LNK2001: unresolved external symbol __imp__ImageList_LoadImageA@28
Debug/OrusControlsServer.dll : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

/////////////////////////////////////////////////////////////////////

As you can see I'm using an ATL CComboBoxEx object and there is no problem with that. Do anyone have any
idea of what going one.

Thanks for your help, Alain-Serge.

Are you linking with comctl32.lib? Smile | :)

I have mvc++ 6.0. I have a SDI CDialog. I click on the date time picker icon and presto, I have a date time picker. I then go to class wizard and add the member variable m_datetime to IDC_DATETIMEPICKER and I change it from 'type' to 'control' so that I have declared in my header file

CDateTimeCtrl m_datetime;

When I compile the program, I get the error:

'CDateTimeCtrl' missing storage class or type specifiers

and it's referring to line that I have declared CDateTimeCtrl. I don't understand what I am doing wrong. It is my understanding the msvc++ 6.0 has the header file CDateTimeCtrl. So why do I need to enter it?

Please, any response any one can give me will be greatly appreciated.

Sincerely,
Danielle

You need to #include <afxdtctl.h>

This might be an OLE control, in which case you need to make sure you have the line

#include <afxctl.h>

in your stdafx.h file.

Otherwise, it might require the

#include <afxcmn.h>

line added to your stdafx.h file.

The build goes a lot faster if you do not include these header files if you are not using any of those controls in your project, so they are not in the stdafx.h by default.

I need to get a CWnd * to the window that has the focus (even if outside of my application), check to see if its a CEdit, and then do some Stuff. I have tried many thorough tests with CWnd's GetFocus(), GetForegroundWindow(), etc, and have not succeeded. It seems I can get a pointer to the CEdit's framework but not the CEdit itself. I am checking to see if its a CEdit by getting the class name and comparing to "EDIT".

Is there a better way to do this? Any help is appreciated.

Hello,

I've been trying to use CMap to create a hashing table of pointers to elements based on a class that specifies an unique coordinate.
Class CPonto (translates to CPoint) has 3 members: x,y,z of type UINT, and my CMap member should be able to give me a pointer to the object CMyObject if there is any at [x,y,z], or NULL if not.

Each unique coordinate refers to only one CMyObject, or NULL if it isn't ocupied.

I have declared my CMap member variable as follows:
[ccode]
#include <afxtempl.h>
CMap<cponto,cponto&,cmyobject*,cmyobject*> myWorld;
[/ccode]
However compilers generates:
[b]. D:\Program Files\DevStudio\VC\MFC\include\afxtempl.h(129) : error C2440: 'type cast' : cannot convert from 'class CPonto' to 'unsigned long'
. No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called[/b]

which jumps to a line containing
[ccode]
return ((UINT)(void*)(DWORD)key) >> 4;
[/ccode]
and it seems to my that my key has to be a sizeof() 4-bytes variable, which isn't explained by MSDN.

My main question is: Is it possible to have CPonto as KEY and ARG_KEY type? How?
Thinking of what error says: "No user-defined-conversion operator available that can perform this conversion"... Does it mean i can do that (programatically specify an automatic operator that converts CPonto to DWORD)? How?

Note: UINT types for CPonto members x,y,z could be of type BYTE, so it would fit in 3 of the 4 byte of DWORD, still, i don't know if CPonto's definition correctly aligns these members, but anyway, i bet it can be done, so i'm asking here. Also, i'm trying to use CMap to avoid certain limitations I have with other ways, mainly the resources needed only to reach a coordinate like (100,100,100) - memory - ie, there is no sense in using an UINT to store a XYZ coordinate like (500,500,500) if most of the times user can't reach it, right? I think that with CMap it would be possible.

If you can be of any help... Thanks in advance,

Hello, Nuno!

See: http://home.socal.rr.com/samhobbs/VC/Collections.html

That might help you. The importnat hting is that instead of:

CMap myWorld;

you probably need something like:

CMap <dword, dword,="" cmyobject,="" cmyobject&=""> myWorld;

Does that look like what you want?

I prefer to use typedefs, so I would do that this way:

typedef CMap <dword, dword,="" cmyobject,="" cmyobject&=""> CMyObjectMap;

CMyObjectMap m_MyObjectMap;

Yes, I think that you are correct that default hash keys are four bytes, because someone in the CodeGuru forum said that, but when I asked him where in the documentation it says that he said he did not want to answer my question because I had given him a negative rating for saying that he was not spamming CodeGuru with a message about the CodeProject web site.

Hey! I know I did the first reply correctly; it must have gotten messed up by this CodeProject thingee. I sure miss the CodeGuru's preview feature. I took advantage of it often.

I will do my post again and this time I will be sure to copy the password number for fixing this one.

Ok, I got the same result this time that I got the first time. The problem seems to be the brackets used as delimiters for STL. So in the code below use a less-than-symbol ("<") instead of "{" and use a greater-than-symbol (">") instead of "}". This CodeProject forum software seems to exclude text between the "angle" brackets.

So what I meant to say is that instead of:

CMap myWorld;

you probably need something like:

CMap {DWORD, DWORD, CMyObject, CMyObject&} myWorld;

Does that look like what you want?

I prefer to use typedefs, so I would do that this way:

typedef CMap {DWORD, DWORD, CMyObject, CMyObject&} CMyObjectMap;

CMyObjectMap myWorld;

Eheheh, i couldn't avoid laughing Smile | :)

It's weird indeed, since it's a programmers forum.

Anyway, i think you missed my point (probably as a consequence). My problem is that i need CMap capabilities but with a KEY larger than sizeof(DWORD).

I'm actually digging your suggestion and MSDN CTypedPtrMap. My first choice was that last, but once again, MSDN makes it sound something it seems it's not. I really couldn't think of any application that would need to get a pointer based on a string or something like that, but PERHAPS it would fit my case.

Is there any way to transform 3 UINT in a CString object so that memory is correctly aligned without using string-formatting and string-parsing routines? I'm trying to ask if is there a way to accomplish something like this:

char buffer[sizeof(UINT)*3];
memcpy(buffer,&m_uintarray,sizeof(UINT)*3);

?

Once again, Sam, thank you very much!

If you do not have to remove items from this list too frequently, then you could use an AVL tree or a binary tree or a ternary search tree.
These types of items do not have a limit on the key length.

You might find some examples of these tree types on CodeProject or on CodeGuru.

I recall seeing an AVL example on CodeGuru before.

Yes, I missed your point. I got confused by the part that says "UINT types for CPonto members x,y,z could be of type BYTE, so it would fit in 3 of the 4 byte of DWORD". So I am still a little confused, but I guess the important thing is that you want to be able to use CMap with a key that is more than 4 bytes in size.

I did some more searching and found MS KB article Q158541 ("PRB: C2440 Error When Using CMap and User Defined Key Type"). I think that is relevant.

See: http://support.microsoft.com/support/kb/articles/q158/5/41.asp for the online copy of the article.

Hi again Sam,

MS KB suggests exactly what i said i could do if i declared CPonto members as BYTE's, and that i already did.

After digging some more, i guess one possible solution would be using a CString as the key and use CMapStringToPtr, something like that:

CString key;
CPonto point(1,2,3);
key.Format("%d%d%d",CPonto.x,CPonto.y,CPonto.z);
// now call CMapStringToPtr.SetAt()

Anyway, thank you all who tried to help.

Hello,

I´d like to use a Toolbar in my MFC Program which is the same as the INternet Explorer/ VC++6.0 use. Where can I find Information? The normal Menus via the API (CreateManu etc.) are only flat, but I want this cool bevel effect.

Sebastian

Sebastian,

There is a demo project on this site and on codeguru. Your looking for 'hot tool bar'. I think the article was written by Kirk Stowell, if I remember correctly.

Email me if you can't find it.

Sincerely,
Erich J. Ruth

How do I print a dialog box?

Best thing to do is a screen grab.

void CMachine::PrintWindow()
{
// show options

CMyPrintDialog PrintDlg(
FALSE,
PD_ALLPAGES | PD_USEDEVMODECOPIES | PD_NOPAGENUMS | PD_NOSELECTION |
PD_DISABLEPRINTTOFILE,
this);

int Response = 0;
Response = PrintDlg.DoModal();

if (Response == IDOK)
{
// get printer dc

HDC hPrinterDC =(HDC) 0;
hPrinterDC = PrintDlg.m_pd.hDC;
ASSERT(hPrinterDC != NULL);

CDC PrinterDC;
BOOL IsAttached = FALSE;
IsAttached = PrinterDC.Attach(hPrinterDC);
ASSERT(IsAttached);

// Set landscape
LPDEVMODE pDevMode = PrintDlg.GetDevMode();
pDevMode->dmFields |= DM_ORIENTATION;
pDevMode->dmOrientation = DMORIENT_LANDSCAPE;
PrinterDC.ResetDC(pDevMode);

// attempt to set abort procedure

int SetAbortProcStatus = 0;
// SetAbortProcStatus = PrinterDC.SetAbortProc( &AbortProc );

// attempt to start print job

DOCINFO DocInfo;
DocInfo.cbSize = sizeof(DOCINFO);
DocInfo.lpszOutput = NULL;
DocInfo.lpszDocName = "PDMW Windows Screen Print";

int StartDocStatus = 0;
StartDocStatus = PrinterDC.StartDoc(&DocInfo);

// if abort procedure set and print job started

if (SetAbortProcStatus >= 0 && StartDocStatus >= 0)
{
// start page

VERIFY(PrinterDC.StartPage() > 0);

// get the screen dc

HDC hScreenDC =(HDC) 0;
hScreenDC = ::GetDC(NULL);// CDC
ASSERT(hScreenDC != NULL);

CDC ScreenDC;
VERIFY(ScreenDC.Attach(hScreenDC));

// create screen device dependent (dd) bitmap

CRect tmp;
GetWindowRect(tmp);
// ClientToScreen(tmp);
// tmp.top -= ::GetSystemMetrics(SM_CYCAPTION);

int ScreenWidth = tmp.Width();// - ::GetSystemMetrics(SM_CXEDGE) * 4;// 0;

// ScreenWidth = ScreenDC.GetDeviceCaps( HORZRES );

int ScreenHeight = tmp.Height();// + ::GetSystemMetrics(SM_CYCAPTION);// - ::GetSystemMetrics(SM_CYEDGE) * 4;
//- ::GetSystemMetrics(SM_CYCAPTION);// 0;
// ScreenHeight = ScreenDC.GetDeviceCaps( VERTRES );

CBitmap ScreenBitmap;
VERIFY(ScreenBitmap.CreateCompatibleBitmap(
&ScreenDC,
ScreenWidth,
ScreenHeight
));

// copy image to screen dd bitmap

CDC MemDC;
VERIFY(MemDC.CreateCompatibleDC(&ScreenDC));

CBitmap* pOldBitmap = NULL;
pOldBitmap = MemDC.SelectObject(&ScreenBitmap);
ASSERT(pOldBitmap != NULL);

VERIFY(MemDC.BitBlt(
0,
0,
ScreenWidth,
ScreenHeight,
&ScreenDC,
tmp.left,
tmp.top,
SRCCOPY
));

// create device independent (di) bitmap

const int BitCount = 24;
long ImageSize = 0;
ImageSize =((((ScreenWidth * BitCount) + 31) & ~31) >> 3)
* ScreenHeight;

BYTE* pBitmapBits = NULL;
pBitmapBits = new BYTE[ImageSize];
ASSERT(pBitmapBits != NULL);

// copy image from screen dd bitmap to di bitmap

BITMAPINFO BitmapInfo;
BitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
BitmapInfo.bmiHeader.biWidth = ScreenWidth;
BitmapInfo.bmiHeader.biHeight = ScreenHeight;
BitmapInfo.bmiHeader.biPlanes = 1;
BitmapInfo.bmiHeader.biBitCount = BitCount;
BitmapInfo.bmiHeader.biCompression = BI_RGB;
BitmapInfo.bmiHeader.biSizeImage = ImageSize;
BitmapInfo.bmiHeader.biXPelsPerMeter = 0;
BitmapInfo.bmiHeader.biYPelsPerMeter = 0;
BitmapInfo.bmiHeader.biClrUsed = 0;
BitmapInfo.bmiHeader.biClrImportant = 0;
memset(&BitmapInfo.bmiColors[0], 0, sizeof(RGBQUAD));

VERIFY(GetDIBits(
ScreenDC.m_hDC,
(HBITMAP) ScreenBitmap,
0,
ScreenHeight,
(LPVOID) pBitmapBits,
&BitmapInfo,
DIB_RGB_COLORS
));

VERIFY(ScreenBitmap.DeleteObject());
VERIFY(MemDC.DeleteDC());
ScreenDC.Detach();

// if bitmap selection succeeded

if (pOldBitmap != NULL)
{
// copy di bitmap to printer

int PrinterWidth = 0;
PrinterWidth = PrinterDC.GetDeviceCaps(HORZRES);

int PrinterHeight = 0;
PrinterHeight = PrinterDC.GetDeviceCaps(VERTRES);

if (PrintDlg.m_bCheckFullPage)
{
VERIFY(StretchDIBits(
PrinterDC.m_hDC,
0,
0,
PrinterWidth,
PrinterHeight,
0,
0,
ScreenWidth,
ScreenHeight,
(LPVOID) pBitmapBits,
&BitmapInfo,
DIB_RGB_COLORS,
SRCCOPY
) != GDI_ERROR);
}
else
{
CString strFactor;
int dFactor;
// PrintDlg.m_EditMagnifyCtrl.GetWindowText(strFactor);
strFactor = PrintDlg.GetFactorText();
if (strFactor.IsEmpty())
dFactor = 1;
else
{
dFactor = atoi(strFactor);
if (dFactor < 1)
dFactor = 1;
}
VERIFY(StretchDIBits(
PrinterDC.m_hDC,
(PrinterWidth - ScreenWidth * dFactor) / 2,
(PrinterHeight - ScreenHeight * dFactor) / 2,
ScreenWidth * dFactor,
ScreenHeight * dFactor,
0,
0,
ScreenWidth,
ScreenHeight,
(LPVOID) pBitmapBits,
&BitmapInfo,
DIB_RGB_COLORS,
SRCCOPY
) != GDI_ERROR);
}

// finish the print job

VERIFY(PrinterDC.EndPage() >= 0);
VERIFY(PrinterDC.EndDoc() >= 0);
}

// else could not select bitmap

else
{
// abort job

VERIFY(PrinterDC.AbortDoc() >= 0);
AfxMessageBox("Could Not Print--Memory Error Possible.");
}

// clean up

delete pBitmapBits;
}

// else job cannot be started

else
{
// attempt to abort job

PrinterDC.AbortDoc();
AfxMessageBox("Cannot Start Print Job.");
}

// clean up

PrinterDC.Detach();
VERIFY(DeleteDC(hPrinterDC));
}
}

BOOL CALLBACK CMachine::AbortProc(HDC hdc, int iCode)
{
MSG msg;
while (!bUserAbort && PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (!hDlgPrint || !::IsDialogMessage(hDlgPrint, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
if (iCode > 0)
bUserAbort = 1;
return !bUserAbort;
}

I have implemented an interface using ATL(in-proc server). In one of the interface methods, I display a modal dialog. The dialog is written in MFC. When this interface method and hence when the dialog class' DoModal() is called, there is a line of code in MFC libraries, that calls AfxGetInstanceHandle(). The function AfxGetInstanceHandle() ASSERTs if a variable by name afxCurrentInstanceHandle is not NULL. Unfortunately this variable is NULL. AfxGetInstanceHandle() is supposed to return the handle of the EXE. Am I doing things right?