What's wrong with this???? - C / C++ / MFC Discussion Boards

Antony M Kancidrowski4-Nov-04 8:07

4-Nov-04 8:07

Looking at your example you do not have x, y and z in your new struct, just one flag called xyz_offset.

If you want different flags for x, y and z then you need to specify them in your struct.

The the check if (mystruct.x) will work just fine.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: Union question

Steve Messer4-Nov-04 14:48

Steve Messer

4-Nov-04 14:48

Yes, your are correct x,y, and z don't exist in the new struct. I only showed the new (actual) struct since you said that my made up struct had a mistake in that the unsigned space: 3;

I had only put a three because that I didn't know where the 16 in the new struct had come from.

C++ function pointers

_psh_4-Nov-04 7:57

_psh_

4-Nov-04 7:57

Hi,

I have a problem with function pointers in C++. As example;

class A
{
...

public:
double go(double (A::*f)(double, double));
double callMe(double, double);
void myFunc();
}

...

double A::go(double (A::*f)(double, double))
{
return f(1, 2); // for example
}

double A::callMe(double x, double y)
{
return x+y;
}

void A::myFunc()
{
go(&A::callMe);
}

But the compiler complains that A::f is not a function pointer?? I really can't se why. Any ideas

Thanks guys!

Re: C++ function pointers

Peter Weyzen4-Nov-04 8:08

Peter Weyzen

4-Nov-04 8:08

First off, I need to say that function pointers are yucky and should be avoided whenever possible.

I think the answer is:
double A::go(double (A::*f)(double, double))
{
return (*f)(1, 2); // for example
}

It's something so much nicer done with interfaces...
*sigh*

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

Re: C++ function pointers

Michael Dunn4-Nov-04 12:28

Michael Dunn

4-Nov-04 12:28

This is untested, but change

double A::go(double (A::*f)(double, double))
{
  return f(1, 2); // for example
}

double A::go(double (A::*f)(double, double))
{
  return (this->*f)(1, 2); // for example
}

You can't call a non-static member function without specifying what the this object will be.

--
I'm Michael Dunn and I approve this post.

Vote Trogdor in oh-four!

Disabling Scripts in IWebBrowser2

Member 14952024-Nov-04 7:52

Member 1495202

4-Nov-04 7:52

I have implemented an instance of IWebBrowser2 in my application and am using IDocHostUIHandler::GetHostInfo(DOCHOSTUIINFO* pInfo) to set various properties of the web browser such as no 3D border (DOCHOSTUIFLAG_NO3DBORDER) and no scroll bars (DOCHOSTUIFLAG_SCROLL_NO). I also wish to disable the running of scripts in my instance of the browser and have attempted to use DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE. The suppression of the 3D border and scroll bars is working perfectly but the suppression of scripts is not working. Here is my implementation of IDocHostUIHandler::GetHostInfo(DOCHOSTUIINFO* pInfo):

HRESULT FAR EXPORT ZBrowser::XDocHostUIHandler::GetHostInfo(DOCHOSTUIINFO* pInfo)
{
/*
DOCHOSTUIFLAG_DIALOG = 0x00000001,
DOCHOSTUIFLAG_DISABLE_HELP_MENU = 0x00000002,
DOCHOSTUIFLAG_NO3DBORDER = 0x00000004,
DOCHOSTUIFLAG_SCROLL_NO = 0x00000008,
DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE = 0x00000010,
DOCHOSTUIFLAG_OPENNEWWIN = 0x00000020,
DOCHOSTUIFLAG_DISABLE_OFFSCREEN = 0x00000040,
DOCHOSTUIFLAG_FLAT_SCROLLBAR = 0x00000080,
DOCHOSTUIFLAG_DIV_BLOCKDEFAULT = 0x00000100,
DOCHOSTUIFLAG_ACTIVATE_CLIENTHIT_ONLY = 0x00000200,
DOCHOSTUIFLAG_OVERRIDEBEHAVIORFACTORY = 0x00000400,
DOCHOSTUIFLAG_CODEPAGELINKEDFONTS = 0x00000800,
DOCHOSTUIFLAG_URL_ENCODING_DISABLE_UTF8 = 0x00001000,
DOCHOSTUIFLAG_URL_ENCODING_ENABLE_UTF8 = 0x00002000,
DOCHOSTUIFLAG_ENABLE_FORMS_AUTOCOMPLETE = 0x00004000,
DOCHOSTUIFLAG_ENABLE_INPLACE_NAVIGATION = 0x00010000,
DOCHOSTUIFLAG_IME_ENABLE_RECONVERSION = 0x00020000,
DOCHOSTUIFLAG_THEME = 0x00040000,
DOCHOSTUIFLAG_NOTHEME = 0x00080000,
DOCHOSTUIFLAG_NOPICS = 0x00100000
*/

pInfo->cbSize = sizeof(DOCHOSTUIINFO);
pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER | DOCHOSTUIFLAG_SCROLL_NO | DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE;

pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT;

return S_OK;
}

Any help on this would be greatly appreciated!

Thanks!

Peter Gorgia
peter.gorgia@tradeweb.com

NULL pContext on Dynamic Window Creation??

Ali Niaz4-Nov-04 6:57

Ali Niaz

4-Nov-04 6:57

I am creating a window at run-time, using this command:
CChildFrame2* pMDIChildWnd = new CChildFrame2;

pMDIChildWnd->Create(NULL, _T("My "), WS_CHILD | WS_VISIBLE | WS_OVERLAPPEDWINDOW, rectDefault, NULL, NULL);

I've made a number of attempts to create a CCreateContext pContext, but have been unsuccessful. I think I might have to register some DocTemplate at initialization or something??

Please Help

A

What's wrong with this????

Tom Wright4-Nov-04 5:49

Tom Wright

4-Nov-04 5:49

I'm trying to create my threads, but when I go to compile this I get an error:

<br />
void CLAMsgSwDlg::StartAllThreads()<br />
{<br />
	int nCount = m_lClientConn.GetItemCount();<br />
<br />
	ThreadInfo *mythreadinfo = new ThreadInfo[nCount];<br />
	for (int i = 0; i < nCount; i++)<br />
	{<br />
		mythreadinfo[i].thdIPaddress = m_lClientConn.GetItemText(i, 0);<br />
		mythreadinfo[i].thdPort = m_lClientConn.GetItemText(i, 1);<br />
<br />
		//Start all threads here.<br />
		CWinThread* pThread = new CWinThread[nCount];<br />
		pThread[i] = AfxBeginThread(myThreadFunc, &mythreadinfo[i]);<br />
<br />
		//Save the handle to the thread<br />
		HANDLE* hThread = new HANDLE[nCount];<br />
		hThread[i] = pThread->m_hThread;<br />
	}<br />
}<br />
<br />
UINT CLAMsgSwDlg::myThreadFunc(LPVOID pParam)<br />
{<br />
	m_sConnectSocket.SetParent(this);<br />
	//if (OnCreate)<br />
	//{<br />
<br />
	//}<br />
	<br />
}<br />
<br />

Can some one tell me what I'm doing wrong here. i get an error "none of the 2 overloads can convert the first parameter"

Thanks

Tom Wright
tawright915@yahoo.com

Re: What's wrong with this????

David Crow4-Nov-04 7:41

David Crow

4-Nov-04 7:41

You did not indicate what line was in error so I can only assume it was the AfxBeginThread() statement. Yes? If so, myThreadFunc() should be a static member, or a non-class function.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: What's wrong with this????

Tom Wright4-Nov-04 7:56

Tom Wright

4-Nov-04 7:56

Thanks David, I saw that in another program that I wrote a while back. After I made the function static, I received another error.

On the same call I get an error "operator =" function is not avaliable in CWinThread.

In the MSDN is says that it returns a pointer to the newly created object. Did I not setup my pointer right?

Thanks

Tom Wright
tawright915@yahoo.com

Re: What's wrong with this????

Antony M Kancidrowski4-Nov-04 8:24

Antony M Kancidrowski

4-Nov-04 8:24

OK, this may help you out. Firtly make the myThreadFunc static as David says.

Then if you alter the parameter class/struct to hold a pointer to the CLAMsgSwDlg class you can call the non-static member function and therefore other member elements.

Add the following to the ThreadInfo class/struct

CLAMsgSwDlg* thdParent;

Make the alterations in bold

void CLAMsgSwDlg::StartAllThreads()
{
int nCount = m_lClientConn.GetItemCount();
<p></p>
ThreadInfo *mythreadinfo = new ThreadInfo[nCount];
for (int i = 0; i < nCount; i++)
{
mythreadinfo[i].thdIPaddress = m_lClientConn.GetItemText(i, 0);
mythreadinfo[i].thdPort = m_lClientConn.GetItemText(i, 1);
mythreadinfo[i].thdParent = this;
<p></p>
//Start all threads here.
CWinThread* pThread = new CWinThread[nCount];
pThread[i] = AfxBeginThread(myThreadFunc, &mythreadinfo[i]);
<p></p>
//Save the handle to the thread
HANDLE* hThread = new HANDLE[nCount];
hThread[i] = pThread->m_hThread;
}
}
<p></p>
UINT CLAMsgSwDlg::myThreadFunc(LPVOID pParam)
{
ThreadInfo *threadinfo = reinterpret_cast<ThreadInfo*>(pParam);
ASSERT(theadinfo != NULL);

threadinfo->thdParent->DoThreadStuff();
}
<p></p>
void CLAMsgSwDlg::DoThreadStuff()
{
m_sConnectSocket.SetParent(this);
//if (OnCreate)
//{

//}
}

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: What's wrong with this????

Sujan Christo4-Nov-04 19:55

Sujan Christo

4-Nov-04 19:55

Hi,
myThreadFunc function must have 2 be a global function. So you are using a worker thread.Have a look @ this link this will surely help you
http://www.flounder.com/workerthreads.htm[^]
Sujan

Current directory defining

dudic4-Nov-04 5:27

dudic

4-Nov-04 5:27

How to define current directory? Actually a directory from which program started. And a back side of this: how to define whether file exist in a specified path ?

Re: Current directory defining

Tom Wright4-Nov-04 6:12

Tom Wright

4-Nov-04 6:12

Take a look at "GetModuleHandle" and "GetModuleFileName"

GetModuleHandle will return a handle to the currently running app.

Use the handle in GetModuleFileName to get the path of the module...or you app.

You can also use GetCurrentDirectory().

That should do it.

Hope this helps

Tom Wright
tawright915@yahoo.com

Thread question

Tom Wright4-Nov-04 4:12

Tom Wright

4-Nov-04 4:12

I'm creating three to four socket client threads. Each one connecting to a different socket server.

At the creation of my threads I'm passing a pointer to a struct.

As each thread accesses this struct, will they see everything that the other threads see or will the struct be set in it own memory slot and only see data for that thread?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Thread question

lesnikowski4-Nov-04 5:21

lesnikowski

4-Nov-04 5:21

All threads will see the same struct.

Add menu to CDialog?

DanYELL4-Nov-04 4:00

DanYELL

4-Nov-04 4:00

Im just stumped. Anyone know of a good article or demo
project which shows how to put a menu in a CDialog? I
just want to create a simple menu for a CDialog based
application.

Please, any response any one can give me will be
greatly appreciated.

Sincerely,
Danielle Brina (an overworked graduate student)

Re: Add menu to CDialog?

Tom Wright4-Nov-04 4:15

Tom Wright

4-Nov-04 4:15

First create your menu in in the resource editor. if you have not added a menu then you will need to add one first.

After you've created your menu then in your dialog attach it. In .Net look in the properties menu for your dialog screen. In VS 6.0 right click on your dialog screen and choose properties. In the first tab you will see a drop down to choose your menu ID that you wich to use.

Hope this helps

Tom Wright
tawright915@yahoo.com

Screenshot to .PNG

peterchen4-Nov-04 3:50

peterchen

4-Nov-04 3:50

Hi,
I need to crank out a quick, lightweight error reporting helper application, and would like to add a screenshot to it. I have a rough idea how I would do that, but do you know something "out of the box"?

Related: I'd love to save this to an e-mail file (including the image as attachment). Any lightweight helpers for that?

we are here to help each other get through this thing, whatever it is Vonnegut jr.
boost your code || Fold With Us! || sighist | doxygen

Skin on scrollbar of richedit control

verma-rahul4-Nov-04 3:18

verma-rahul

4-Nov-04 3:18

I want to put Skin of a PNG image on scrollbar of richedit control.how can i.

Learner always

Path to pdb file in binary

kydfru4-Nov-04 2:51

kydfru

4-Nov-04 2:51

When VS genereates a binary it writes full local path to pdb file as a string to it.
For example C:\Solution\Project\Release\Project.pdb

How to disable this and maybe other private information leackage?

Re: Path to pdb file in binary

Blake Miller4-Nov-04 6:13

Blake Miller

4-Nov-04 6:13

What if you don't generate the PDB in the first place?
Then it might not write anything.

Re: Path to pdb file in binary

kydfru4-Nov-04 6:22

kydfru

4-Nov-04 6:22

What do you by 'first place'?
Tried to switch to Debug and clean then back to Release and no success. String with path still presents even if pbd file doesn't exists.

Re: Path to pdb file in binary

Blake Miller4-Nov-04 6:32

Blake Miller

4-Nov-04 6:32

This is what I meant...

Assuming Visual C++ 6.0 (You may have to search around for similar for VC 7.X or later...)
Open the Project Settings.
Make sure the 'Settings for' mentions your release build, typically 'Win32 Release'.
Go to the 'Link' tab.
Change the Category combobox to say 'Customize'
Make sure the 'Use Program Database' in NOT checked.
Change the Category combobox to say 'Debug'
Make sure that 'Debug Info' is NOT checked.

This will make your release EXE as much as possible without any symbols or line number information in it.
Make sure you do a Rebuild All after changing the settings.

Some companies build a release with enough symbolic information to use the PDB files to debug the release builds. Yours might have been set up or changed to be this way. The steps above will undo those changes.

Tnaks!

kydfru4-Nov-04 6:53

kydfru

4-Nov-04 6:53

Oh! No idea why I didn't find that menu before.
Thanks a lot! Now the binary is a little bit cleaner.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.