Parsing a CSV file - problem - C / C++ / MFC Discussion Boards

And it appears it took you less than 7 minutes Poke tongue | ;-P

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Google is a beautiful thing!

todo....
:: insert inpirational text here ::

Where and how do I make changes to how MFC opens a recent file when the user selects one from the menu? Confused | :confused:

You can override the OnOpenRecentFile function...I answered this in a previous post

http://www.codeproject.com/script/comments/forums.asp?msg=367106&forumid=1647#xx367106xx

You can remove the call to the base class or add additional code before or after the call to modify the behavior

Gary Kirkham

A working Program is one that has only unobserved bugs

I thought I wanted a career, turns out I just wanted paychecks

Hi guys!

I'm a beginner and I just want to know how to change the background color of a MDI (without doc/view)app. There's a lot of exemples out there, but they are for dialog based app.

Also, I have some other problems. I'm not able to change the icon and title of my child windows.

I tried:

BOOL OpenGL_ContextMFC::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying the CREATESTRUCT cs
if( !CMDIChildWnd::PreCreateWindow(cs) )
return FALSE;
cs.lpszName = "My child window name";//change my name here
cs.cx = 500;
cs.cy = 500;
cs.dwExStyle &= ~WS_EX_CLIENTEDGE;
cs.lpszClass = AfxRegisterWndClass(0);

return TRUE;
}

I can change the height and width of the windows but not the name.

Any ideas?

Thanks! Smile | :)

About your first problem:I'm sure there is an article in this site that discribe it,but I can't remember where was it.Search here,you can find it. Smile | :)

Mazy

"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits

I found it:

http://www.codeproject.com/dialog/mdibackgroundimage.asp

Smile | :)

Mazy

"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits

Hello everybody, i am trying to parse a simple CSV file (see a little file sample below) using the functions found in the book 'PROFESSIONAL MFC with VC++6' by M. Blaszczak, Wrox. I am working with VC7.
The functions work fine but unfortunately i can get only the first, say, N-1 values parsed instead of all the N wished ones.

for example in the sample below

i get parsed only:
label0 .. label5 as labels row (missing label6)
field0,f1,f2,f3,f4,f5 as first row of values (missing field f6)
0,10,20,30,40,50 as second row of values (missing 60)
and so on...
I mean only six values (with reference to the csv file sample), not all the seven values

any help/tip will be gratly appreciated!
Thanks in advance

<br />
class CMyDoc : public CDocument<br />
{<br />
<br />
public:<br />
	int CountChars(CString& ref, TCHAR ch = ',') const;<br />
	CString GetField(CString& ref, int nIndex, TCHAR ch = ',') const;<br />
<br />
...<br />
<br />
<br />
};<br />
<br />
...<br />
<br />
int CMyDoc::CountChars(CString& ref, TCHAR ch) const<br />
{<br />
	LPCTSTR pstrBuffer = ref.LockBuffer();<br />
	int nCount = 0;<br />
<br />
	while (*pstrBuffer != _T('\0'))<br />
	{<br />
		if (*pstrBuffer == ch)<br />
			nCount++;<br />
		pstrBuffer++;<br />
	}<br />
<br />
	ref.UnlockBuffer();<br />
	return nCount;<br />
}<br />
<br />
<br />
CString CMyDoc::GetField(CString& ref, int nIndex, TCHAR ch) const<br />
<br />
<br />
{<br />
	CString strReturn;<br />
	LPCTSTR pstrStart = ref.LockBuffer();<br />
	LPCTSTR pstrBuffer = pstrStart;<br />
	int nCurrent = 0;<br />
	int nStart = 0;<br />
	int nEnd = 0;<br />
	int nOldStart = 0;<br />
<br />
	while (nCurrent <= nIndex && *pstrBuffer != _T('\0'))<br />
	{<br />
		<br />
		if (*pstrBuffer == ch)<br />
		{<br />
			nOldStart = nStart;<br />
			nStart = nEnd+1;<br />
			<br />
			nCurrent++;<br />
		}<br />
<br />
		<br />
		nEnd++;<br />
		pstrBuffer++;<br />
	}<br />
<br />
	ref.UnlockBuffer();<br />
<br />
	<br />
	if (*pstrBuffer == _T('\0'))<br />
	{<br />
		TRACE("Warning: Couldn't find it.\n");<br />
		return strReturn;<br />
	}<br />
	<br />
	return ref.Mid(nOldStart, nEnd-nOldStart-1);<br />
}<br />
<br />
<br />
<br />
...<br />
<br />
// CALLING STUFF<br />
<br />
...<br />
<br />
int nColumns = pDoc->CountChars(pDoc->m_strColumns);<br />
	TRACE("N. col= %d, header titles= %s\n", nColumns, pDoc->m_strColumns);<br />
	int nIndex;<br />
	CString strCurrent;<br />
	for (nIndex = 0; nIndex < nColumns; nIndex++)<br />
	{<br />
		... print values ...<br />
	}<br />

SAMPLE FILE.CSV

label0,label1,label2,label3,label4,label5,label6 <-- labels row
field0,f1,f2,f3,f4,f5,f6 <-- first row of values
0,10,20,30,40,50,60 <-- second row of values
...

best regards

Try my article, CDataFile[^] Just change the std::vector<<double> values="" to="" std::vector<cstring>="" and="" comment="" out="" the="" statistics="" stuff="" you'll="" be="" good="" go.=""

<b="">- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

my message was truncated Confused | :confused:

Anyway, change the double vector to CString and scrap the statistics stuff and you'll be good to go.

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

thank you very much Nitron!
i have just downloaded your excellent code and i'll give it a try as soon as possible
anyway i would be really interested in finding the reasons why the code above form Wrox book doesn't work as expected
I have tried to debug it and follow all the steps to figure out why the last field isn't parsed but so far i could'f find an answer so i would appreciate very much if anybody could point me towards the solution

thanks again!

best regards

Hello world...
I use a grabber with 4 cameras connected and I get images from this 4 cameras.
Next, I display all images in the same View...
My question is simple:
Is the Document OR the View which must acquire the images?
I suppose It's the Document... Because the Data is the image and the view only display the data...
When I press the start menu (to start the acquisition) is the Document or the View which must handle this message?

Thanks in advance...

Hello World!!! Smile | :)

from Raphaël

Raphaël Kindt wrote:
I use a grabber with 4 cameras connected and I get images from this 4 cameras.

Got any spare cameras you don't need? I'm taking donations. Smile | :)

Raphaël Kindt wrote:
When I press the start menu (to start the acquisition) is the Document or the View which must handle this message?

My instinct tells me it's the Document that needs to handle this. But I imagine you also want to update the view as the acquisition is in progress. So as you're loading the images, call UpdateAllViews to let the views know of the new data that has come in.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

You are right. From an architectural point of view its the Document that should get the images. The purpose of the view should be restricted to display and of course user interface.

Raphaël Kindt wrote:
When I press the start menu (to start the acquisition) is the Document or the View which must handle this message?

This is potentially more interesting a question Smile | :)

It really depends on the kind of system you are building. Ideally the document will have a fucntion that will tell it to go and acquire the images.

Now in one situation you can have the menu send its command to the view which will tell the document to load the images.

In another case you could have the menu send a message to the view which will load the document which already has the images loaded because some other process told it to do so, or because the document is told to load images every so often.

Another case, where there is no menu, when the document finds images the view turns on.

Not sure if I actually answered the second question Wink | ;-)

Raphaël Kindt wrote:
When I press the start menu (to start the acquisition) is the Document or the View which must handle this message

IMHO it's the MainFrame which should process the command. Knowing which document is currently active, it will be able to call for this object the document's method responsible for loading the data.

HTH,

K.

Angels banished from heaven have no choice but to become demons
Cowboy Bebop

I think that's a good idea...
Thanks Karl...

Hello World!!! Smile | :)

from Raphaël

I wonder if there is an easy way to rename a class
including its source file in Visual Studio.
Has .NET Studio any support for this Confused | :confused:

?
Variable renaming would also be a fine thing.
Simply change the name in the class wizard and all
occurences of the variable are renamed.

This would make refactoring the code much easier when
I change my code in the late stage of a project to
clean up loose ends.

Regards,

Alois Kraus

Edit->Find and Replace->Replace in Files

Check out the regular expression you pretty much can do anything old grep used to do.

Nope, you gotta do it the old fashioned way. Find/Replace.

My guess why DevStudio doesn't have this feature is that it may be difficult to do accurately every time. They'd rather avoid the risk of renaming something inappropriately.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Hello,

I would like to make something similar to the Start menu of 2000/XP: you can double click on any popup menu to open the item (therefore you can select items that are not leaves in your menu). Anyone has an idea how to do this?

Regards,
mynab

Hi!

I'm doing this:

if(bRectangleFlag)
{
if (bAddTenHousesFlag = true)
{
CBrush myBrush;
myBrush.CreateSolidBrush(RGB(255,0,0));
HBRUSH hMyBrush = (HBRUSH)myBrush;
pDC->SelectObject(hMyBrush);
pDC->Rectangle(Anchor.x,Anchor.y,DrawTo.x,DrawTo.y);
pDoc->pMetaFileDC->SelectObject(hMyBrush);
pDoc->pMetaFileDC->Rectangle(Anchor.x,Anchor.y,DrawTo.x,DrawTo.y);
}
pDC->SelectStockObject(NULL_BRUSH);
pDC->Rectangle(Anchor.x,Anchor.y,DrawTo.x,DrawTo.y);
pDoc->pMetaFileDC->SelectStockObject(NULL_BRUSH);
pDoc->pMetaFileDC->Rectangle(Anchor.x,Anchor.y,DrawTo.x,DrawTo.y);

}

But the return from SelectObject is killing mu program!

Anyone know why?

Thanks,

quirky Confused | :confused:

pDC->SelectObject(&myBrush);

You don't need hMyBrush.

Many thanks, it now works !

quirky Big Grin | :-D

Try something like this:

[...]
{
CBrush myBrush;
myBrush.CreateSolidBrush(RGB(255,0,0));
CBrush* pOldBrush pDC->SelectObject(&myBrush);
pDC->...
...
pDC->SelectObject(pOldBrush);
}
[...].

This way, you are sure to select the brush out of the DC (by selecting in whatever has been there before) before the variable that contains it goes out of scope.
Hope this helps

--
"My opinions may have changed, but not the fact that I am right."
Found in the sig of Herbert Kaminski

Hi Friends
Below is the code wich i used to split the window
It executes well but remains minimised, WHY ??
please identify the mistakes as well as other things to implement if there is

#include <afxwin.h>
#include <afxext.h>

/////////////////////////////////////////////////
// my view class
class myView : public CView
{
DECLARE_DYNCREATE(myView)

public:
myView();

void OnDraw(CDC *dc);

DECLARE_MESSAGE_MAP()
};

myView::myView()
{}
/////////////////////////////////////////////////

// my main class
class myMain:public CFrameWnd
{
public:
myMain();
afx_msg void OnPaint();
CSplitterWnd splitter;

BOOL OnCreateClient(LPCREATESTRUCT,CCreateContext*);
DECLARE_MESSAGE_MAP();
};

myMain::myMain()
{
Create(NULL,"MFC");
}

BOOL myMain::OnCreateClient(LPCREATESTRUCT rs,CCreateContext* context )
{
// Adding the splitter
if (!splitter.CreateStatic(this,1,2,
WS_CHILD|WS_VISIBLE) )
{
TRACE0("Failed to CreateStaticSplitter\n");
return FALSE;
}
// Creating first view(left)
if ( !splitter.CreateView( 0, 0,
RUNTIME_CLASS(myView ),
CSize(50,50), context
) )
{
TRACE0("Failed to create second pane\n");
return FALSE;
}
// Creating second view(right)
if (!splitter.CreateView( 0, 1,
RUNTIME_CLASS(myView ),
CSize(50,50), context
) )
{
TRACE0("Failed to create second pane\n");
return FALSE;
}

return FALSE;

}
//////////////////////////////////////////////////////

// my application calss
class myApp:public CWinApp
{
public:
BOOL InitInstance()
{
m_pMainWnd=new myMain;
m_pMainWnd->ShowWindow(m_nCmdShow);
m_pMainWnd->UpdateWindow();

return TRUE;
}
};
//////////////////////////////////////////////////

// my document class
class myDoc : public CDocument
{
DECLARE_DYNCREATE(myDoc)

public:
myDoc()
{}
};

void myView::OnDraw(CDC *dc)
{
myDoc *p_myDoc = (myDoc*) GetDocument();

}
/////////////////////////////////////////////////////

BEGIN_MESSAGE_MAP(myMain,CFrameWnd)
END_MESSAGE_MAP()

BEGIN_MESSAGE_MAP(myView,CView)
END_MESSAGE_MAP()

myApp App;

IMPLEMENT_DYNCREATE(myDoc,CDocument)
IMPLEMENT_DYNCREATE(myView,CView)