C / C++ / MFC

Re: how to create an installation package

27-Jun-06 22:35

See Easy Installer[^]

whitesky

Ramón Pardo27-Jun-06 23:00

Ramón Pardo

27-Jun-06 23:00

Hi,
I use Nullsoft Scriptable Install System (http://nsis.sourceforge.net).
You can also use it to pack commercial applications for free Smile | :)

Cheers,
Ramon

how to update edit controls?

thathvamsi27-Jun-06 22:13

thathvamsi

27-Jun-06 22:13

hey guys......
In my proj,
I have a form view page(say, "Form1") with various controls. On clicking a tool bar(say, "New dialog") control , a new dialog page pops/opens up.
and On opening this new dialog page, i want the edit controls in that dialog page to be updated with some values.

how do i do this?

if I do
#define WM_INFO WM_USER+10
I understand these are private messages, but
how and when does the message gets passed on to the respective message handlers? will this help in doing the above.

I create ON_MESSAGE(WM_INFO, OnUpdateInformation) in the cpp file

but how does it work?

Can anyone help please?
thanks in advance.

Re: how to update edit controls?

Sarath C27-Jun-06 23:15

Sarath C

27-Jun-06 23:15

I think you can do the filling of edit box with values in OnInitDialog function. that is the best way.
Messages are using for notification with parameters(LPARAM,WPARAM).
You can use SendMessage or PostMessage to invoke that application (see MSDN for difference between PostMessage and SendMessage).

e.g

#define SHOW 1
#define HIDE 0

ON_MESSAGE(WM_INVOKE_CHILD, OnInvokeChild)


OnInvokeChild(WPARAM wParam, LPARAM lParam);
{
   if(SHOW == wParam)
      m_childWnd->ShowWindows(SW_SHOWNORMAL);
   else(SHOW == wParam)
      m_childWnd->ShowWindows(SW_HIDE);
}

you can use either param to pass the values

See MSDN for more information.

http://msdn2.microsoft.com/en-us/library/0812b0wa.aspx[^]

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

Re: how to update edit controls?

David Crow28-Jun-06 6:08

David Crow

28-Jun-06 6:08

Use ClassWizard (Ctrl+W) to create a CEdit member variable for each of the edit controls. In the dialog's OnInitDialog() method, call SetWindowText() with each CEdit-derived variable.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: how to update edit controls? [modified]

thathvamsi28-Jun-06 17:19

thathvamsi

28-Jun-06 17:19

hey I have created CEdit member variable for my control. But I dont find OnInitDialog() method in my dialog.cpp file. Isnt OnInitDialog() automatically generated by classwizard?
how do i include OnInitDialog()?

-- modified at 23:22 Wednesday 28th June, 2006
I create the dialog using DoModal()

Re: how to update edit controls?

David Crow29-Jun-06 2:40

David Crow

29-Jun-06 2:40

thathvamsi wrote:
Isnt OnInitDialog() automatically generated by classwizard?

Yes. I've never seen it not be generated.

thathvamsi wrote:
how do i include OnInitDialog()?

Via ClassWizard.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

how we get the IDs of the menu items

happy_ram27-Jun-06 21:16

happy_ram

27-Jun-06 21:16

how we get the IDs of the menu items
ram.

Re: how we get the IDs of the menu items

Hamid_RT27-Jun-06 21:24

Making CTabCtrl flicker free?

27-Jun-06 21:24

<br />
CMenu m;<br />
m.GetMenuItemID(pos);

whitesky

Moak27-Jun-06 21:14

Moak

27-Jun-06 21:14

Hi
I have a CTabCtrl in a resizeable dialog and it flickers a lot if I resize the dialog. Any ideas, e.g. make it an owner draw control?

/M

Hamid_RT27-Jun-06 21:29

27-Jun-06 21:29

See Here[^] maybe it is some helpful to you

whitesky

Moak4-May-07 11:52

Moak

4-May-07 11:52

thanks. Indeed I am going owner-draw now.

Hamid_RT5-May-07 4:57

5-May-07 4:57

Very good. Big Grin | :-D

WhiteSky

Pointer to class member function

Sarath C27-Jun-06 21:39

Sarath C

27-Jun-06 21:39

Use Double Buffering technique [^] for drawing the control

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

Mila02527-Jun-06 21:13

Mila025

27-Jun-06 21:13

Hi,

Maybe today isn't my best day Wink | ;)

but could anyone tell me what is wrong with this snippet ?

class CTest
{
public:
  CTest()
  {
    (*(this)).lpFunc = &CTest::Write;
  }
  long Write(DWORD dwInfo)
  {
    ...
  }
  long (*lpFunc)(DWORD);
}

I've got error C2440:

'=' : cannot convert from 'long (__thiscall CTest::* )(DWORD)' to 'long (__cdecl *)(DWORD)'

and when I change line: (*(this)).lpFunc = &CTest::Write;
to

(CTest::*lpFunc) = &CTest::Write;

I've got another error code:

error C2059: syntax error : '<tag>::*'

Generally I want to point on lpFunc a pointer to Write fuction but within class (I don't want to any globals).

-----------
Mila

-- modified at 3:15 Wednesday 28th June, 2006

toxcct27-Jun-06 21:20

toxcct

27-Jun-06 21:20

Mila025 wrote:
'=' : cannot convert from 'long (__thiscall CTest::* )(DWORD)' to 'long (__cdecl *)(DWORD)'

notice the calling convention of the two parts of your operator = reported by the compiler.

you function Write has to be either static or global. the fact is that being a class member function implicitely adds it the this pointer parameter...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

talkshit11-Jul-06 2:07

talkshit1

1-Jul-06 2:07

static need be there ONLY if it is not a member of the class.

super_ttd1-Jul-06 9:59

super_ttd

1-Jul-06 9:59

certainly not !!!
compile the code and tell if the compiler complains... Suspicious | :suss:

-- TTD --

Don Box27-Jun-06 21:28

Don Box

27-Jun-06 21:28

That Write method MUST be static.
So solution is :-

class CTest

{

public:

CTest()

{

(*(this)).lpFunc = &CTest::Write;

}

static long Write(DWORD dwInfo)

{

...

}

long (*lpFunc)(DWORD);

}

Justin Tay27-Jun-06 21:31

Justin Tay

27-Jun-06 21:31

That's not how you declare a member function pointer.

class CTest
{
  public:
  CTest()
  {
    lpFunc = &CTest::Write;
  }
  long Write(DWORD dwInfo)
  {
    ...
  }
  long (CTest::*lpFunc)(DWORD); // declaration for member function pointer
};
<pre>

Size of structure in c++

Tony Kurishunkal27-Jun-06 20:33

Tony Kurishunkal

27-Jun-06 20:33

Dear friends pls check the following program
I tried it in VC++ compiler and the size of structure is depending on the order of variables
What is the reason behind it
any one pls answer me
Thanks

// struct.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "iostream.h"

struct st1
{
char q ;
int p;

}a1;

struct st2
{
char q ;
char r;
int p;

}b1;

struct st3
{
char q ;
int p;
char c;

}c1;

int main(int argc, char* argv[])
{

cout << sizeof(a1);
cout<

bob1697227-Jun-06 20:43

bob16972

27-Jun-06 20:43

From MSDN...

"When applied to a structure type or variable, sizeof returns the actual size, which may include padding bytes inserted for alignment."

Tony Kurishunkal27-Jun-06 22:39

Tony Kurishunkal

27-Jun-06 22:39

Thanks bob
Thank you very much

FarPointer27-Jun-06 20:47

FarPointer

27-Jun-06 20:47

More info see this :-
http://www.codeguru.com/forum/showthread.php?t=276622[^]

Regards,
FarPointer
Blog:FARPOINTER