C / C++ / MFC

Jay Hova13-Aug-03 8:23

13-Aug-03 8:23

I get an assertion failure with that code that I had....

You lost me however with what you wrote. I don't understand it. Where should I put that code? Please clarify if you can.

Many many thanks.

David Crow13-Aug-03 8:42

13-Aug-03 8:42

Jay Hova wrote:
I get an assertion failure with that code that I had....

See my previous comment about DoDataExchange(). Even though you have a CButton control variable, there must be an entry in DoDataExchange() for it. To verify, note the file/line of the fired assertion. If you then look at that code, it will most likely look something like:

ASSERT(::IsWindow(m_hWnd));

which means there is no window associated with the variable.

Jay Hova wrote:
You lost me however with what you wrote. I don't understand it. Where should I put that code? Please clarify if you can.

You previously mentioned that the dialog was being displayed as the result of a menu selection. I assume you already have a call to DoModal() in there. Correct?

Jay Hova13-Aug-03 8:53

13-Aug-03 8:53

I tried to implement the code you wrote, but i get an error saying that m_SendTo is an undeclared identifier.

The assertion failure is in afxwin2.inl on line 588....

Thanks again for your help.

Your patience is amazing! Blush | :O

David Crow13-Aug-03 8:58

13-Aug-03 8:58

Jay Hova wrote:
I tried to implement the code you wrote, but i get an error saying that m_SendTo is an undeclared identifier.

Right. You'll need to add this member variable to the appropriate class.

Jay Hova wrote:
The assertion failure is in afxwin2.inl on line 588....

As I predicted:

_AFXWIN_INLINE int CButton::GetCheck() const
	{ ASSERT(::IsWindow(m_hWnd)); return (int)::SendMessage(m_hWnd, BM_GETCHECK, 0, 0); }

Jay Hova13-Aug-03 9:08

13-Aug-03 9:08

David,

Sorry that you have to spoon feed me through this. I feel like such a moron because I can not grasp this concept. I really appreciate your help.

What do i have to put in DoDataExchange? Also by adding the member variable to the other cpp file, won't it over write the existing data in m_SendTo?

Thanks.

David Crow13-Aug-03 9:15

13-Aug-03 9:15

Jay Hova wrote:
Sorry that you have to spoon feed me through this. I feel like such a moron because I can not grasp this concept. I really appreciate your help.

Not a problem. The first few applications are always the hardest.

Jay Hova wrote:
What do i have to put in DoDataExchange? Also by adding the member variable to the other cpp file, won't it over write the existing data in m_SendTo?

I've never had to manaully add anything to DoDataExchange(). ClassWizard does it all for me (hint: use CW to create the member and control variables). By looking at that function, however, you can get a feel for what MFC might be doing.

Jay Hova wrote:
Also by adding the member variable to the other cpp file, won't it over write the existing data in m_SendTo?

I'm not quite sure I understand what you are asking here. Care to elaborate?

Jay Hova13-Aug-03 9:32

convert a string into a date

13-Aug-03 9:32

David,

Thank you for your help. I had to manually insert the control in DoDataExchange because after reading the article you linked me to earlier today, i ungrouped the second radio. It doesn't make sense to me, but it seems to be working right now.

Now to the next part of this app....

Many many thanks for your help, patience, and understanding. You are really a class act guy!

si_6913-Aug-03 4:30

si_69

13-Aug-03 4:30

hi all

does ne1 know how i can convert a string into a date

i have an XML tag

<date_in>2003-08-13T09:26:24.7000000+01:00

but this brings the date back as a string,

what i need from there is the date in the format '2003-08-13'
as an actual date

does ne1 have ne ideas

thanks

si

si_6913-Aug-03 4:31

si_69

13-Aug-03 4:31

it should be this

<date_in>2003-08-13T09:26:24.7000000+01:00</date_in>

si_6913-Aug-03 5:23

si_69

13-Aug-03 5:23

this is what i come up with, if ne1 knows a better way pls let me know

thanks si

CString strTime2=strValue;
int val = strTime2.Find("T");
int len = strTime2.GetLength();
if (val > 0)
{
CString date = strTime2.Left(val);
CString time = strTime2.Right(len-val);
sct_dt.time = strTime2.Mid(++val,8);
CString year = date.Left(4);
CString month = date.Mid(5,2);
CString day = date.Right(2);
sct_dt.date = day+"/"+month+"/"+year;

}

David Crow13-Aug-03 5:30

13-Aug-03 5:30

Have you looked at COleDateTime::ParseDateTime()?

Steve S13-Aug-03 5:43

Steve S

13-Aug-03 5:43

Does that handle XML format dates, then? I knew it did dd/mm/yyyy or mm/dd/yyyy (based on locale). We've a local function to handle XML formatting with or without Thh:mm formats, but it doesn't yet handle offsets.

Steve S

David Crow13-Aug-03 5:59

13-Aug-03 5:59

Steve S wrote:
Does that handle XML format dates, then?

There's no such thing as XML format dates. XML is a way to organize data. It is not concerned with format or display.

If the first 10 characters of the string is always in the format you previously described, this should work:

CString str = "2003-08-13T09:26:24.7000000+01:00";
COleDateTime date;
date.ParseDateTime(str.Left(10));

Steve S13-Aug-03 23:24

Steve S

13-Aug-03 23:24

Picky, picky...;)

I meant does it handle dates/times in the format commonly found in XML files, namely YYYY-MM-DD[Thh:mm:ss[.9999999[+/-hh:mm]]] (where the T may be replaced by a space), of course. This is often specified in schemas, such as GML as used by the UK's Ordnance Survey organisation. That's of particular interest to me, since I'm currently working for a company which writes GIS, mapping and location management systems.

The answer is no, in a single call, which is what I was trying to clarify, so thanks.

Steve S

Using PBS_SMOOTH

keegan13-Aug-03 4:24

keegan

13-Aug-03 4:24

I've tried a few different ways of using pbs_smooth for a progress control but when i do, i run into problems.

the first way i tried it is using progress_control.SendMessage(PBS_SMOOTE, x, x) but i don't know what to put in for x and x, so it crashed.

the second way i tried was by adding OnCreate() to my class, and adding

progress_control.Create(WS_CHILD|WS_VISIBLE|PBS_SMOOTH, CRect(10,10,200,30), pParentWnd, 1);

I foudn that at msdn. My problem with that is where does pParentWnd come from? I dont have any classes derived from CWnd, so i don't know of anything i can put in there. CDialog does not work Frown | :(

:-/

*.*
cin >> knowledge;

doh

keegan13-Aug-03 4:54

keegan

13-Aug-03 4:54

there's a way to do it in the resource editor, i shoulda known.

*.*
cin >> knowledge;

Re: Using PBS_SMOOTH

Ryan Binns13-Aug-03 5:03

Changing pixel color on a bitmap

13-Aug-03 5:03

progress_control.ModifyStyle(0, PBS_SMOOTH);

keegan wrote:
where does pParentWnd come from?

The parent of the progress control, usually a pointer to your dialog. In this case, you'd probably do

progress_control.Create(WS_CHILD|WS_VISIBLE|PBS_SMOOTH, CRect(10,10,200,30), this, 1);

Hope this helps,

Ryan

"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"

vcplusplus13-Aug-03 4:23

vcplusplus

13-Aug-03 4:23

I have a button on my CFormView with a bitmap. How can I change the color of each individual pixel in the bitmap?

Ryan Binns13-Aug-03 5:05

13-Aug-03 5:05

dwccgc wrote:
How can I change the color of each individual pixel in the bitmap?

Select it into a device context and use SetPixel() or SetPixelV(), the latter being the fastest.

Ryan

"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"

vcplusplus13-Aug-03 6:40

vcplusplus

13-Aug-03 6:40

I need to get the current color before I use SetPixel(..), but I
cannot get GetPixel() to work. pDc->GetPixel() returns -1.

Maybe I am missing something.

Note:
m_ExitButtonCtrl is of type CButton.
hbmButtonExit is of type HBITMAP.

void CMyFormView::OnInitialUpdate() 
{
   CFormView::OnInitialUpdate();

    // Load BitMap
    hbmButtonExit = ::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BUTTON_EXIT));
    if (hbmButtonExit != NULL)
    {
       m_ExitButtonCtrl.SetBitmap(hbmButtonExit);
       CDC *pDc = m_ExitButtonCtrl.GetDC();
       if (pDc != NULL)
       {
           for (INT nX = 0; nX < 69; nX++)
           {
               for (INT nY = 0; nY < 47; nY++)
               {
                  COLORREF OrgColor = pDc->GetPixel(nX, nY);
               }
           }
       }
    }
    return;
}

Ryan Binns14-Aug-03 0:09

14-Aug-03 0:09

You need to select the bitmap into a device context.

void CMyFormView::OnInitialUpdate()
{
    CFormView::OnInitialUpdate();
    hbmButtonExit = ::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BUTTON_EXIT));
    if (hbmButtonExit != NULL)
    {
        CClientDC dc(this);
        CDC memDC;
        memDC.CreateCompatibleDC(&dc);
        CBitmap *pBitmap = memDC.SelectObject(CBitmap::FromHandle(hbmButtonExit));
        for (INT nX = 0; nX < 69; nX++)
        {
            for (INT nY = 0; nY < 47; nY++)
            {
                COLORREF OrgColor = memDC.GetPixel(nX, nY);
                // Do whatever else here
            }
        }
        memDC.SelectObject(pBitmap);
        m_ExitButtonCtrl.SetBitmap(hbmButtonExit);
    }
}

Ryan

"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"

vcplusplus14-Aug-03 2:37

vcplusplus

14-Aug-03 2:37

Thanks for the help. Smile | :)

Ryan Binns14-Aug-03 3:10