C / C++ / MFC Discussion Boards

Masaaki Onishi18-Apr-01 15:58

18-Apr-01 15:58

Hello, the codegurus around the world.;)

There are a couple of ways to do your wish.

One is to use static function to get CWnd of FormView.
In MSDN help, you will find the followings.

HOWTO: Get Current CDocument or CView from Anywhere
Last reviewed: July 31, 1997
Article ID: Q108587

In detail,
For SDI application,

// View implementation file
CMyView * CMyView::GetView()
{
    CFrameWnd * pFrame = (CFrameWnd *)(AfxGetApp()->m_pMainWnd);
    CView * pView = pFrame->GetActiveView();

    if ( !pView )
      return NULL;

    // Fail if view is of wrong kind
    // (this could occur with splitter windows, or additional
    // views on a single document
    if ( ! pView->IsKindOf( RUNTIME_CLASS(CMyView) ) )
       return NULL;

    return (CMyView *) pView;
}

For an MDI application, the CMyView::GetView() code should be the following:

// MDI view implementation file
CMyView * CMyView::GetView()
{
    CMDIChildWnd * pChild =
    ((CMDIFrameWnd*)(AfxGetApp()->m_pMainWnd))->MDIGetActive();

    if ( !pChild )
       return NULL;

    CView * pView = pChild->GetActiveView();

    if ( !pView )
    return NULL;

    // Fail if view is of wrong kind
    if ( ! pView->IsKindOf( RUNTIME_CLASS(CMyView) ) )
    return NULL;

    return (CMyView *) pView;
}

Now, from anywhere in your program, where the document or view header files have been included, you can call:

CMyView::GetView();

After you get CWnd of FormView, you can access CWnd of Edit control on CYourFormView.
You had better change from CMyView to CMyFormView. Roll eyes | :rolleyes:

Have a nice day!
-Masaaki Onishi-

Re: Get string without CSDIFormView ...

Hadi Rezaee19-Apr-01 0:12

Hadi Rezaee

19-Apr-01 0:12

Hi Masaaki, and thanks a looot for reply.
But i couldn't write this program, because i'm begginer.
If possible, write small example about it, and send to me, Please please please ...

Frown | :(

Hadi Rezaie

How to send a 'refresh' message to MS-Dev from an another MFC application

EiSl18-Apr-01 3:14

EiSl

18-Apr-01 3:14

Hello all,

I've recently made a source-code navigater (Explorer look-alike, MFC application), on which one can doubleclick on a file. For source-code files, these files will then be opened in Microsoft Developer Studio (version 6).

My problem
----------
Sometimes the view of MSDEV is corrupted by contents of my MFC-application. When minimize and maximize MS-DEV, the view is correct again.
So actually I need to refresh the MSDEV environment, after opening a file from external application (my application).

Question Confused | :confused:

--------
How can I make MSDEV refreshing the view from an other application?

Many thanks,

EiSl

CListCtrl Sorting

Mustafa Demirhan18-Apr-01 3:07

Mustafa Demirhan

18-Apr-01 3:07

Hi,
I want to sort items in a CListCtrl. However, the sorting is not according to the first column. For example, when the user clicks on another column in the header, the list should be sorted according to that column.

I tried many methods, but I wasnt successful. I am waiting for your helps.

Thank you for any helps in advance
regards

Mustafa Demirhan

Re: CListCtrl Sorting

18-Apr-01 19:14

I don't know of an 'in list' solution - I do it by keeping the data in a structured array, then grab the button that has been clicked over and sorting the array by that 'colomn' values, then empty and reinsert. I remember using flexgrid once and it did it a whole lot easier, but was it's own world of grief in other areas...

Re: CListCtrl Sorting

Ammar18-Apr-01 19:33

Ammar

18-Apr-01 19:33

Do a search on this forum for:
Sorting data in CListCtrl columns

I asked the same question. Let me know when you are done with the sorting implementation. Smile | :)

Ammar

Re: CListCtrl Sorting

19-Apr-01 5:11

Thanks a lot. I have solved the problem.

rtWhy the bitmap just don't show?!

hike18-Apr-01 1:25

hike

18-Apr-01 1:25

I try to create and show a bitmap based on one short array.No error occours during compile,but the bitmap just don't show on the view.
My code as follow:
void CReadfile1View::DrawDIBSection(HDC hDC , int xDest,int yDest,int w, int h,signed short*image)
{

BITMAPINFOHEADER *bih=0;
// HDC hDC=0;
HBITMAP hbm;
void *bits;
try
{ // allocate room for BITMAPINFOHEADER and color mask's
if(!(bih = (BITMAPINFOHEADER*)malloc(sizeof(BITMAPINFOHEADER))))
throw 0;
ZeroMemory(bih,sizeof(BITMAPINFOHEADER));
bih->biSize = sizeof(BITMAPINFOHEADER);
bih->biWidth = w; // .
bih->biHeight = h; // match array-size
bih->biPlanes = 1;
bih->biBitCount = 16;
bih->biCompression = BI_RGB; // we use 5:5:5 format
bih->biSizeImage = bih->biWidth * 2 * bih->biHeight;
if(!(hDC = ::GetDC(0))) throw 0; // create the 16-bit DIBSECTION
if(!(hbm = ::CreateDIBSection(hDC,(BITMAPINFO*)bih,DIB_RGB_COLORS,&bits,0,0))) //
throw 0; // get the array into the DIBSECTION
if(::SetDIBits(hDC,hbm,0,h,image,(BITMAPINFO*)bih, DIB_RGB_COLORS) != h)
throw 0;
}
catch(...)
{
// cout<<"unknown type of exception throw"<<'\n';
}

HDC hDCMem=::CreateCompatibleDC(hDC);
HGDIOBJ hBmpOld=::SelectObject(hDCMem,hbm);
BitBlt(hDC,xDest,yDest,bih->biWidth,bih->biHeight,hDCMem,0,0,SRCCOPY);

::SelectObject(hDCMem, hBmpOld);
::DeleteDC(hDCMem);
if(hDC) ::ReleaseDC(0,hDC);
if(bih) free(bih);
}
void CReadfile1View::OnDraw(CDC* pDC)
{
CReadfile1Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
DrawDIBSection(*pDC,10,10,WIDTH,HEIGHT,pDoc->Image[0]);
}
Who can tell me why it don't works and how to improve?!
thanx!
Eek! | :eek:

fly against the wind

Re: rtWhy the bitmap just don't show?!

Istvan Eperjesy23-Apr-01 1:16

Istvan Eperjesy

23-Apr-01 1:16

Hi,

I didn't have much time to check your code completely, but I think the source line:

if(!(hDC = ::GetDC(0))) throw 0; // create the 16-bit DIBSECTION

is incorrect.

You re-initialize the local parameter hDC, which was sent by the call to your DrawDIBSection(..) function in the OnDraw method. It will be set to a DC for the desktop, by ::GetDC(0).
This hDC is used for the BitBlt(..) command later.

Not a sollution, but just a hint... Smile | :)

Istvan Eperjesy

Problem, help !!

VitSoft18-Apr-01 0:50

VitSoft

18-Apr-01 0:50

Hi All !!
I've stupid problem !!! It make me crazy Frown | :(

I want to use WinAPI struct ALTTABINFO
this struct is contained in <winuser.h>

but no way to use this struct because compiler performs an output:

error C2065: 'ALTTABINFO' : undeclared identifier

for example

//#include <winuser.h> //but I must include windows.h, look in help
#include<windows.h>

void main(void)
{
ALTTABINFO myInfo;// error!! why???
.....
}

Best regards VitSoft

Re: Problem, help !!

NormDroid18-Apr-01 0:58

NormDroid

18-Apr-01 0:58

If you do not have MSDN, get it and get it quick, you can't possible write windows programs without it (I have but that was many moons ago).

The ALTTABINFO structure contains status information for the application-switching (ALT+TAB) window.

typedef struct tagALTTABINFO {
DWORD cbSize;
int cItems;
int cColumns;
int cRows;
int iColFocus;
int iRowFocus;
int cxItem;
int cyItem;
POINT ptStart;
} ALTTABINFO, *PALTTABINFO, *LPALTTABINFO;
Members
cbSize
Specifies the size, in bytes, of the structure.
cItems
Specifies the number of items in the window.
cColumns
Specifies the number of columns in the window.
cRows
Specifies the number of rows in the window.
iColFocus
Specifies the column of the item that has the focus.
iRowFocus
Specifies the row of the item that has the focus.
cxItem
Specifies the width of each icon in the application-switching window.
cyItem
Specifies the height of each icon in the application-switching window.
ptStart
Specifies the top-left corner of the first icon.
Requirements
Windows NT/2000 or later: Requires Windows NT 4.0 SP6 or later.
Windows 95/98/Me: Requires Windows 98 or later.
Header: Declared in Winuser.h; include Windows.h.

See Also
Windows Overview, Window Structures, GetAltTabInfo

Re: Problem, help !!

VitSoft18-Apr-01 1:12

VitSoft

18-Apr-01 1:12

Hi !!!
Thanks !!
I've MSDN lib,I know it possible to redefine this struct, but when you want use GetAltTabInfo(..) function
you have the same problem.
Why compiler don't know about this function or struct ?

error C2065: 'GetAltTabInfo' : undeclared identifier

I'm a long time work with VC, but it's first time when i have problem like this ;(
Thanks and Good Luck

Re: Problem, help !!

Michael Dunn18-Apr-01 8:05

Michael Dunn

18-Apr-01 8:05

If you look in winuser.h, you'll see the ALTTABINFO declaration is wrapped in an #if (WINVER >= 0x0500) block. You'll need to #define WINVER 0x0500 before your #include statements.

--Mike--
http://home.inreach.com/mdunn/
The Signature, back by popular demand: Buffy. Pajamas.

Changing security attributes in Access

Ammar17-Apr-01 23:08

Ammar

17-Apr-01 23:08

I need to change the MSysObjects attributes to read only thru VC.
I will be able to read tables info if I could do that. By default, MSysObjects cannot be read. I can change the setting thru Access 2000 but I want to do it thru VC.

Help!

Ammar

Day Light Savings Time ( is it on)

Colin J Davies17-Apr-01 19:47

Colin J Davies

17-Apr-01 19:47

Is there a function that will tell me if
Day Light Savings is turned on and if an OS is
running in summer or winter

Warm Regardz

Re: Day Light Savings Time ( is it on)

Michael Dunn17-Apr-01 20:03

Michael Dunn

17-Apr-01 20:03

I think the CRT variable _daylight indicates whether daylight savings time is in effect. The docs aren't exactly crystal clear, though.

--Mike--
http://home.inreach.com/mdunn/
The Signature, back by popular demand: Buffy. Pajamas.

Re: Day Light Savings Time ( is it on)

Colin J Davies17-Apr-01 21:00

Colin J Davies

17-Apr-01 21:00

Thanks for the speedy response Mike,
Yes you are right !
but its now proving a devil to test for
I'll implement it anyway as its several months before DST comes into effect here, To see if it works correctly.

Regardz
Colin

Fast Algorithm needed for Co-odinates along Ellipse

Wolfram Steinke17-Apr-01 19:39

Wolfram Steinke

17-Apr-01 19:39

I am looking for a fast algorithm for outputing the co-ordinates of points along an ellipse, given the bounding rectangle.
Basically as the Ellipse drawing function only that it outputs the co-ordinates of the pixels rather than drawing them.

Any suggestions would be gratefully received.

Happy programming!!

Re: Fast Algorithm needed for Co-odinates along Ellipse

Christian Graus17-Apr-01 21:56

Christian Graus

17-Apr-01 21:56

This is just quick and dirty code (written straight in an untested). This code assumes the definition of things like point2d (it's a floating point 2d point) and pi. The maths is pretty simple trigonometry, so if you have any trouble go to the library. Here goes:

<br />
point2d *GetEllipsePoints(float height, float width, point2d center, long divisions)<br />
{<br />
     point2d *theList = new point2d[divisions];<br />
<br />
     for (long i = 0; i < divisions; i++)<br />
     {<br />
          theList[i].x = cos(((float)i/(float)divisions) * pi / 180.0f)*width*0.5;<br />
          theList[i].y = sin(((float)i/(float)divisions) * pi / 180.0f)*height*0.5;<br />
     }<br />
<br />
     return theList;<br />
}<br />

Christian

The content of this post is not necessarily the opinion of my yadda yadda yadda.

To understand recursion, we must first understand recursion.

linker eror

17-Apr-01 18:42

I am getting linker error for CM_Locate_DevNode() &
CM_Reenumerate_DevNode()functions
as undefined functions.
I have included cfgmgr32.h & i am linking with cfgmgr32.lib.
Can anyone tell me,why is it so??
TIA
Neha

IMPLIB equivalent for VC++

Yong Haur TAY17-Apr-01 18:04

Yong Haur TAY

17-Apr-01 18:04

Hi All,

I want to generate a .LIB file from a .DLL. What is the tool that is available in VC++ to do this? Confused | :confused:

Thanks

regards,
YHTay

VB Add-In Programming

Jamie Nordmeyer17-Apr-01 12:57

Jamie Nordmeyer

17-Apr-01 12:57

How do I start programming a Visual Basic Add-In? I tried the following:

#import "C:\\Program Files\\Microsoft Visual Basic\\VB98\\VB6EXT.OLB"

The compiler failed when it tried to define the 'CommandBarsPtr' type.

Any ideas?

Thanks in advance

Jamie Nordmeyer
Portland, Oregon, USA

VB Add-In Programming

Jamie Nordmeyer17-Apr-01 12:56

Jamie Nordmeyer

17-Apr-01 12:56

How do I start programming a Visual Basic Add-In? I tried the following:

#import "C:\\Program Files\\Microsoft Visual Basic\\VB98\\VB6EXT.OLB"

The compiler failed when it tried to define the 'CommandBarsPtr' type.

Any ideas?

Thanks in advance

Jamie Nordmeyer
Portland, Oregon, USA

Win32 executable location

Michael Anderson17-Apr-01 11:08

Michael Anderson

17-Apr-01 11:08

I'm wondering if it's at all possible to determine the hard drive location of a program from within that program. Any help would be greatly appreciated! Confused | :confused:

-Sparticus

Re: Win32 executable location

C^hris L^osinger17-Apr-01 11:13

C^hris L^osinger

17-Apr-01 11:13

char appPath[MAX_PATH+1];
DWORD res = GetModuleFileName(AfxGetInstanceHandle(), appPath, MAX_PATH);

-c

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