Catching OnSysCommand in own class - C / C++ / MFC Discussion Boards

Re: Char to INT?

Nitron11-Dec-02 13:23

Nitron

11-Dec-02 13:23

i'll second that.

also, if you need a double, atof:

double data = atof(szData);

- Nitron

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

Re: Char to INT?

Greven11-Dec-02 9:21

Greven

11-Dec-02 9:21

I think the easiest way would be to simply cast it...

iTest = (int)cTest[i];

Wouldn't that work? Unsure | :~

Programming in binary is as easy as 01 10 11.

Re: Char to INT?

Alvaro Mendez11-Dec-02 9:29

Alvaro Mendez

11-Dec-02 9:29

Nope, it wouldn't work. Only the first character would be converted, and to it's ASCII value -- which is not what he needs.

Regards,
Alvaro

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

Re: Char to INT?

Greven11-Dec-02 10:23

Greven

11-Dec-02 10:23

Ah, my mistake... Didn't see the quote around 32... Thought he had an array of char's, not a string.
Blush | :O

Programming in binary is as easy as 01 10 11.

Re: Char to INT?

Christian Graus11-Dec-02 10:03

Christian Graus

11-Dec-02 10:03

I generally bring up a console project and test my theory if I'm not sure about advice I am about to give Smile | :)

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Char to INT?

Ravi Bhavnani11-Dec-02 9:39

Ravi Bhavnani

11-Dec-02 9:39

If you don't care about performance Smile | :)

you can do:

sscanf (cTest, "%d", &iTest);

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
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In Place Server

Anthony988711-Dec-02 9:00

Anthony9887

11-Dec-02 9:00

I'm having troubles modifying the menus for the ole server once embedded into a container document.

Thanks

Catching OnSysCommand in own class

BtL2711-Dec-02 8:44

BtL27

11-Dec-02 8:44

Hi,

i think this problem may be easy to answer for you.

I have created my own class:

-header-file:

class CTrayIcon : public CWnd
{
public:
CTrayIcon(); // Konstruktor
virtual ~CTrayIcon(); // Dekonstruktor

int AddTrayIcon(HICON pIcon,int iMenu);
protected:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CTrayIcon)
//}}AFX_VIRTUAL
protected:
//{{AFX_MSG(CTrayIcon)
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

The Class-Wizard automatically adds the function OnSysCommand to the header and of course to the cpp. Now, i do not know, what i must do, that all messages of the dlg-window(main-dialog-window), especially WM_SYSCOMMAND, can catch in my class ?

Re: Catching OnSysCommand in own class

Alvaro Mendez11-Dec-02 9:04

Alvaro Mendez

11-Dec-02 9:04

beni27_27 wrote:
Now, i do not know, what i must do, that all messages of the dlg-window(main-dialog-window), especially WM_SYSCOMMAND, can catch in my class ?

I don't understand what you're asking; please clarify.

Regards,
Alvaro

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

Type Libraries and MFC Question

Nick Parker11-Dec-02 8:40

Nick Parker

11-Dec-02 8:40

I have written a .NET assembly that I want to use in MFC 6.0. According to an MSDN article[^], I need to use the Regasm.exe to make the necessary entries in the registry. I have gone ahead and done this using the following command to create a type library as well:

regasm mcpp.dll /tlb:mcpp.tlb

From what I understood, I then needed to reference the type library that is created one of two ways:

#import "mcpp.tlb" raw_interface_only

#import "mscorlib.tlb"
#import "mcpp.tlb"

I have done this however as soon as I try to compile following this it throws a slew of error within either mcpp.tlb or mscorlib.tlb, depending on which item I try (as I have tried both methods). Does anyone have any experience doing anything of this nature. Thanks

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Copying CString to char*

Like2Byte11-Dec-02 8:32

Like2Byte

11-Dec-02 8:32

Hi,

I need to output some CString data after I've copied it to a char array (ie: char ptrSomeCharArray[33]). I can't seem to get the data extracted from the CString object.

I've tried:

CString m_sFullname("Like2Byte"), m_sAccount("12345678"), m_sRoom("222");
char SomeCharArray[33];

sprintf( SomeCharArray + strlen(SomeCharArray), "%s", m_sAccount);
sprintf( SomeCharArray + strlen(SomeCharArray), "%s", m_sRoom);
sprintf( SomeCharArray + strlen(SomeCharArray), "%s", m_sFullname);

While this compiles without error, inserting it into a
MessageBox function displays garbage. Even wrapping the var in TEXT() doesn't work. I've also tried casting using LPCTSTR, LPTSTR and (const char*). None work correctly.

Anyone help out?

Re: Copying CString to char*

User 665811-Dec-02 8:43

User 6658

11-Dec-02 8:43

Have you tried e.g. sprintf( SomeCharArray + strlen(SomeCharArray), "%s", m_sAccount.GetBuffer(0)); ?

But err, what does the sprintf do? Do you want to append the CString to SomeCharArray? You should use strcat instead

regards

modified 12-Sep-18 21:01pm.

Re: Copying CString to char*

Like2Byte11-Dec-02 8:49

Like2Byte

11-Dec-02 8:49

Well, I tried m_sAccount.Mid(0) but that gave me the same results are m_sAccount.

Let me try your suggestion.
(The 'In a nut-shell' explination)sprintf basically copies whatever kind of data to end of another string converting it to a string when it's all done.
say, SomeCharArray contains "HelloWorld" and someIntValue = 32768.
Therefore, sprintf(SomeCharArray + strlen(SomeCharArray), "%i", someIntValue); copies 32768 to the end of SomeCharArray; thus, leaving, "HelloWorld32768".

(BRB)

Re: Copying CString to char*

Michael Dunn11-Dec-02 8:49

Michael Dunn

11-Dec-02 8:49

Any time you use a string object (CString or any other string wrapper class) with the printf family of functions, you need to cast the object to a pointer type, so that only the pointer is put on the stack.

sprintf( SomeCharArray + strlen(SomeCharArray), "%s", (LPCTSTR) m_sAccount);

But as Gregor said, the real bug in your code is how you construct the string in the first place. Just use one sprintf() call.

--Mike--
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Re: Copying CString to char*

Like2Byte11-Dec-02 8:51

Like2Byte

11-Dec-02 8:51

Of all the places I put (LTCTSTR), I *don't* think I placed it right there. Roll eyes | :rolleyes:

(BRB)

Re: Copying CString to char*

Alvaro Mendez11-Dec-02 8:56

Alvaro Mendez

11-Dec-02 8:56

You can use strcpy, like this:

strcpy(SomeCharArray, m_sAccount + m_sRoom + m_sFullname);

However, you need to be careful that the length of the 3 variables does not surpass the size of SomeCharArray - 1.

Regards,
Alvaro

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

Re: Copying CString to char*

carrie11-Dec-02 10:39

carrie

11-Dec-02 10:39

yeah, thats the method I would use. Nice and easy Smile | :)

Re: Copying CString to char*

Gary R. Wheeler11-Dec-02 14:55

Gary R. Wheeler

11-Dec-02 14:55

You need to initialize SomeCharArray to an empty string, either via

SomeCharArray[0] = '\0';

strcpy(SomeCharArray,"");

otherwise, you're concatenating at an arbitrary location in the string. Another way to do this would be

sprintf("%s%s%s",m_sAccount,m_sRoom,m_sFullname);

Software Zen: delete this;

Re: Copying CString to char*

Shay Harel11-Dec-02 17:36

Shay Harel

11-Dec-02 17:36

Try this :

CString str="Hello";
char *pStr=str.GetBuffer(0);

Thsi should return a pointer of type char representing the string content, always works for me.

Shay

Re: Copying CString to char*

Like2Byte12-Dec-02 3:04

Like2Byte

12-Dec-02 3:04

Well, I appreciate *everyones* help. Big Grin | :-D

I also went over to CodeGuru and found this other method.

Again, thanks.

Handling Checkbox changes in CListCtrl

DRHuff11-Dec-02 7:13

DRHuff

11-Dec-02 7:13

I have a CListCtrl in report mode with checkboxes. With several lines of data I can check/uncheck the check boxes without shifting the selection or getting any update other than an ItemChanged update. I need the checkbox change to be reflected back and set the current selection to the item changed. How do I do this?

I have tried to handle it in the OnItemChanged but I get some really bizarre behaviour.

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Handling Checkbox changes in CListCtrl

Joan M11-Dec-02 7:38

Joan M

11-Dec-02 7:38

take a look at this link...
http://www.codeproject.com/listctrl/listctrldemo.asp[^]

hope this helps...

Re: Handling Checkbox changes in CListCtrl

DRHuff11-Dec-02 7:52

DRHuff

11-Dec-02 7:52

Nope it doesn't.

It tells me how to use GetCheck and SetCheck but it doesn't tell me how to pick up on the change as it is being done.

I am also having a problem similar to one described a few posts down where I have the element selected and when I hit the down key it places me back to the first element in the list. But when I hit the up arrow it works just fine! Mad | :mad:

Thanks

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Handling Checkbox changes in CListCtrl

Alvaro Mendez11-Dec-02 8:28

Alvaro Mendez

11-Dec-02 8:28

Here's some very old code I dug up that handles this. I don't remember how it works -- that's how long it's been -- but I hope it helps.

// Handle the ItemChanged message.
void CMyDlg::OnItemchangedListParts(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
	*pResult = 0;
 
	if (HasCheckboxChanged(pNMListView))
		UpdateControls();
}
 
// Check if the checkbox in the given item has changed.
bool CMyDlg::HasCheckboxChanged(NM_LISTVIEW* pNMListView, bool* pbChecked = NULL) const
{
	ASSERT(pNMListView);
 
	if (pNMListView->uOldState == 0 && pNMListView->uNewState == 0)
		return false; // No change
 
	BOOL bPrevState = (BOOL)(((pNMListView->uOldState & LVIS_STATEIMAGEMASK)>>12) - 1);   // Old check box state
	if (bPrevState < 0)     // On startup there's no previous state 
		bPrevState = 0; // so assign as false (unchecked)
 	
	// New check box state
	BOOL bChecked=(BOOL)(((pNMListView->uNewState & LVIS_STATEIMAGEMASK)>>12) - 1);   
	if (bChecked < 0) // On non-checkbox notifications assume false
		bChecked = 0; 
 
	if (pbChecked)
		*pbChecked = !!bChecked;		
	return (bPrevState != bChecked);
}

Regards,
Alvaro

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

Re: Handling Checkbox changes in CListCtrl

DRHuff11-Dec-02 9:34

DRHuff

11-Dec-02 9:34

Just the ticket!
And I figured out the resetting to first index problem too!

Smile | :)

Thanks

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

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