Re: Problem with painting and global varibles - C / C++ / MFC Discussion Boards

Ylno21-Jun-07 10:29

21-Jun-07 10:29

Sorry if the question makes no sense. That was obviously my fault, i won't be doing that again. Next time i'll be in a position to talk down to a newbie on this subject.

So next stupid question: if the language is no longer relevant then is the
machine language of linux compatible with windows?
I wouldn't have thought so but you can suprise me.

Basically i'm after a language that i'll be able to use cross-platform ...

Re: WIll VC++ run on Linux ?

David Crow21-Jun-07 10:33

David Crow

21-Jun-07 10:33

Ylno wrote:
...is the
machine language of linux compatible with windows?

No, they use different instruction sets. High-level code can be ported from one platform to the other, though. You'll just need a compiler on each to create the machine code.

See here for more.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: WIll VC++ run on Linux ?

Ylno21-Jun-07 10:38

Ylno

21-Jun-07 10:38

Thanks Dave,

You've cleared things up.

Re: WIll VC++ run on Linux ?

markkuk21-Jun-07 21:36

markkuk

21-Jun-07 21:36

Ylno wrote:
is the
machine language of linux compatible with windows?

Linux (or Windows) doesn't have a machine language, machine language is a feature of the processor chip and it's independent of any OS you may be running.

Ylno wrote:
Basically i'm after a language that i'll be able to use cross-platform

C, C++, Java, Python, Ruby, Perl, ...

Re: WIll VC++ run on Linux ?

anzhiguoccc21-Jun-07 17:50

anzhiguoccc

21-Jun-07 17:50

good answer! Laugh | :laugh:

Problem with painting and global varibles

simoncoul21-Jun-07 9:33

simoncoul

21-Jun-07 9:33

Hello, I'm having a bit of trouble and was hoping you guys would be able to help me out. Right now I have a function that produces a 2 arrays with number used from graphing. In the OnPaint part for the dialog box I simply used the MoveTo and LineTo to graph. In order for both functions to get at those arrays I put at the top of the code(like how I would with a global varible in C). But now that program will crash when I run that function twice because of the painting. Any ideas of how to solve this, am I declaring the arrays in the wrong place?

Thanks

Re: Problem with painting and global varibles

Mark Salsbery21-Jun-07 9:39

Mark Salsbery

21-Jun-07 9:39

Are the arrays initialized at the time the first WM_PAINT message is received?

What does the code look like where the crash occurs?

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Problem with painting and global varibles

simoncoul21-Jun-07 9:56

simoncoul

21-Jun-07 9:56

No they are initilized after the WM_PAINT. The code crashes when I access the arrays for the second time to paint, If I comment out the paint code the program will just fine. The code looks like this where is crashes, where x_prime2 and Ey_x2 are the arrays

for(int i=0; i<=999; i++){	
	x = (30+scale2*x_prime2[i]);
	y = (scale1*Ey_x2[i].Real());
	if(i == 0){		
		dc.MoveTo(int(x+min_1*(-1)*scale2), int(y*(-1)+640));
	}
	else{	
		dc.LineTo(int(x+min_1*(-1)*scale2), int(y*(-1)+640));
	}
}

And I initilize them like this

#include "stdafx.h"
#include <math.h>
#include "complex.h"
#include <complex>

int Nglobal;
int *layerglobal = new int [100];
double *thickglobal = new double [100];
Complex *Ey_z_C2=new Complex [1000];//Electrical field in the ridge area in growth direction
Complex *Ey_z_L2=new Complex [1000];//Electrical field in the shoulder area in the growth direction
Complex *Ey_x2= new Complex [1000]; // Electrical field in the transverse direction
Complex *z_prime2=new Complex [1000];			
double *x_prime2=new double [1000];

Re: Problem with painting and global varibles

Mark Salsbery21-Jun-07 10:24

Mark Salsbery

21-Jun-07 10:24

I can't see anything off hand....are you getting a floating point exception?
How is it crashing?

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Problem with painting and global varibles

Mark Salsbery21-Jun-07 10:26

Mark Salsbery

21-Jun-07 10:26

Also, you ARE putting valid values into the arrays before calculations are done on the values,
right?

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Problem with painting and global varibles

simoncoul22-Jun-07 2:40

simoncoul

22-Jun-07 2:40

Yes the values that are being put in are valid, I do not know what a floating point exception is though. The program runs just fine in debug, which is driving me crazy I just can't get the release version to work. Do you think it could have something to do with the compiler options? Is there a way I can paint directly from the function instead of using the OnPaint function?

Thank you very much!

Re: Problem with painting and global varibles

Mark Salsbery22-Jun-07 4:35

Mark Salsbery

22-Jun-07 4:35

You can have debug info on your release build and run it in the debugger.

That's still the easiest and best way to find the offending line of code Smile | :)

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Problem with painting and global varibles

simoncoul22-Jun-07 8:47

simoncoul

22-Jun-07 8:47

I have found my problem, the array was being over written I dunno how, The array was set to be N+1, and then I did a loop from (i=0; i

Accessing classes/functions in .dll added as reference

lechium12121-Jun-07 8:04

lechium121

21-Jun-07 8:04

Hi,

I have a .DLL I compiled (in C# in .NET), and added as a reference to a Visual C++ project in .NET. Now I need to be able to access its members somehow. Both library and its namespace are called HyTest, however HyTest:: or HyTest. yeild nothing. Is there a specific way to access members of a DLL (written in C#) compiled in .NET?

wbr,
Victor

Re: Accessing classes/functions in .dll added as reference

lechium12121-Jun-07 13:00

lechium121

21-Jun-07 13:00

*bump*
sorry if this comes across inconciderate =\ I am on a pretty tight timeframe so any help would be much appriciated

Month Calendar in VC++ 6.0

der Papst21-Jun-07 7:37

der Papst

21-Jun-07 7:37

It's a well known bug: The Month Calendar returns a false Date...

Does somebody know a bugfix or a workaround for this problem? (I'm sorry if a thread already exists but the search found nothing that looked good...)

Re: Month Calendar in VC++ 6.0

Mark Salsbery21-Jun-07 8:09

Mark Salsbery

21-Jun-07 8:09

What's the bug? Have a link?

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Month Calendar in VC++ 6.0 [modified]

der Papst21-Jun-07 8:14

der Papst

21-Jun-07 8:14

Just try this little code:

void CTodolisteDlg::OnSelectkalender(NMHDR* pNMHDR, LRESULT* pResult){
UpdateData(true);
m_tag = m_datetime.Format( "%A, %B %d, %Y" );
UpdateData(false);
}

(m_tag is the membervariable (string) of a textbox and m_datetime is the membervariable (CTime) of the Month Calendar)
In your textbox will be written an other date then you have selected...

-- modified at 14:23 Thursday 21st June, 2007

Re: Month Calendar in VC++ 6.0 [modified]

Mark Salsbery21-Jun-07 8:37

Mark Salsbery

21-Jun-07 8:37

It works for me but I'm on VS 2003 (MFC 7.1). I suppose the bug was/is in CTime somewhere?

For a workaround, maybe use the actual SYSTEMTIME of the NMSELCHANGE struct passed in the
notification and use a "better" date/time class...

void CTodolisteDlg::OnSelectkalender(NMHDR* pNMHDR, LRESULT* pResult)
{
   NMSELCHANGE *pNMSelChange = (NMSELCHANGE *)pNMHDR;
 
   COleDateTime OleDateTime(pNMSelChange->stSelStart);
 
   <code>//m_tag = m_datetime.Format( "%A, %B %d, %Y" );  Ooops!</code>
   m_tag = OleDateTime.Format( "%A, %B %d, %Y" );
 
   UpdateData(false);
}

-- modified at 14:47 Thursday 21st June, 2007
*edit* Ooops Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Month Calendar in VC++ 6.0

der Papst21-Jun-07 8:50

der Papst

21-Jun-07 8:50

Sorry, i'm a "noob" in MFC...
I don't understand how to use this example above, but when I compile it simply it doesn't works cause now is m_datetime not changed...
that means that the selected date is fix set to the inital-value of m_datetime...

Are there alternative calendars that works well for VC++?

Re: Month Calendar in VC++ 6.0

Mark Salsbery21-Jun-07 8:53

Mark Salsbery

21-Jun-07 8:53

See the fixed code - I messed it up and left your variable in there.

Sorry about that Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Month Calendar in VC++ 6.0

der Papst21-Jun-07 9:25

der Papst

21-Jun-07 9:25

I don't understand your Code but it works!

Can you explain what those lines do:
NMSELCHANGE *pNMSelChange = (NMSELCHANGE *)pNMHDR;

COleDateTime OleDateTime(pNMSelChange->stSelStart);

(Cause i want to learn something^^)

Thank you!

You saved my project^^

Re: Month Calendar in VC++ 6.0

Mark Salsbery21-Jun-07 9:36

Mark Salsbery

21-Jun-07 9:36

// Cast the passed NMHDR pointer to a NMSELCHANGE pointer, which is the type
// of structure passed in a MCN_SELECT notification

NMSELCHANGE *pNMSelChange = (NMSELCHANGE *)pNMHDR;

// Create a COleDateTime object from NMSELCHANGE.stSelStart (which is a SYSTEMTIME struct)
// using the COleDateTime(SYSTEMTIME&) constructor

COleDateTime OleDateTime(pNMSelChange->stSelStart);

// use the COleDateTime::Format() method to create a CString representation of the date
...

I don't have access to the MFC code for version 4.x (VC 6) so I'm not sure what the actual bug is.

Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Getting Visible SysListView Columns

Abhijeet Pathak21-Jun-07 5:36

Abhijeet Pathak

21-Jun-07 5:36

Hi All,

I am trying to implement the behavior of SysListView32 using ListView.

When a folder is selected in TreeView, i'm retrieving visible columns for current selection
using the following code:

<br />
	SHELLDETAILS sd;<br />
	LPTSTR pszHeader=NULL;<br />
	CString sColumns;<br />
	for(int i=0;SUCCEEDED(m_ShellDetails.GetDetailsOf(NULL,i,&sd));i++)<br />
	{<br />
		GetShellPidl().StrRetToStr(sd.str,&pszHeader,NULL);<br />
		if (pszHeader)<br />
		{<br />
			TRACE1("Column found %s\n",pszHeader);	<br />
			if (!sColumns.IsEmpty())<br />
				sColumns += _T("|");<br />
			sColumns += pszHeader;<br />
			GetShellPidl().Free(pszHeader);<br />
			pszHeader= NULL;<br />
		}<br />
	}<br />
	return sColumns;<br />

Because normal file system folders have columns like Name, Size, Type and Date Modified,
while Control Panel has columns like Name and Comments.

I am successfully enumerating ALL the columns, but i need to know how to determine whether to make a particular column visible or not. Because a user may determine which columns he/she want to view.

Please Help.

---------------
Never loose hope...

Re: Getting Visible SysListView Columns

David Crow21-Jun-07 6:13

David Crow

21-Jun-07 6:13

a_b_pathak wrote:
I am trying to implement the behavior of SysListView32 using ListView.

What exactly do you mean? Confused | :confused:

The underlying window class of CListView is SysListView32.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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