Re: C++ Open the COM Port on Windows CE Device - C / C++ / MFC Discussion Boards

Re: CMenu with Bitmap icon

_Flaviu2-Sep-14 4:58

_Flaviu

2-Sep-14 4:58

Have you seen this solution ?Bitmap Menu[^]

Re: CMenu with Bitmap icon

Maximilien2-Sep-14 5:31

Maximilien

2-Sep-14 5:31

(disclaimer, I've not tried it on a popup menu; only regular menu).

The simplest way is to use CMFCToolBar::AddToolBarForImageCollection.

You create a dummy toolbar with all the images you want to use and call the above static method and the images will automagically be added to the menus.

I'd rather be phishing!

Re: CMenu with Bitmap icon

Drakesal2-Sep-14 6:59

Drakesal

2-Sep-14 6:59

Can you show me in code if is possible?

Re: CMenu with Bitmap icon

Maximilien2-Sep-14 7:56

Maximilien

2-Sep-14 7:56

It is quite simple, just create a new toolbar with the images you need (with the same ID as your menu ID).

and call

C++

// Load menu items images(not placed on the standard toolbars):
CMFCToolBar::AddToolBarForImageCollection(IDR_MENU_IMAGES);

at the end of the "OnCreate" of the mainframe (in case of a MFC document).

Have a look at the C++/MFC samples available on MSDN.

http://www.microsoft.com/en-us/download/details.aspx?id=5718[^]

There are examples of that in the: "VisualStudioDemo", "NewControls" samples. (among others).

I'd rather be phishing!

Re: CMenu with Bitmap icon

Drakesal2-Sep-14 20:54

Drakesal

2-Sep-14 20:54

I done it!!!!

I did so:

1) OnCreate i put this as you told me:

CMFCToolBar::AddToolBarForImageCollection(IDR_MAINFRAME_256);

2) in Contextmenu i add these lines:

CMFCPopupMenu* PopupMenuFolders = new CMFCPopupMenu();

//Mi serve controllare prima che esce il menu per eventualmente eliminare voci del menu non permesse.
CheckWhatCanIDo(ExtractFullTreePath(htSelectedTreeItem),MainComputerinfo.szSid,m_bUserAuthorizations);

PopupMenuFolders->InsertItem(CMFCToolBarMenuButton(ID_POPUP_FOLDERS_TREE_1, NULL, 0, _T("Item 1")));

PopupMenuFolders->InsertItem(CMFCToolBarMenuButton(ID_POPUP_FOLDERS_TREE_2, NULL, 1, _T("Item 2")));

PopupMenuFolders->InsertItem(CMFCToolBarMenuButton(ID_POPUP_FOLDERS_TREE_3, NULL, 2, _T("Item 3")));

PopupMenuFolders->Create(this, point.x, point.y, NULL);

So you use directly the Toolbar Images.

Thanks all Wink | ;)

Giovanni

C++ Open the COM Port on Windows CE Device

baranils1-Sep-14 9:27

baranils

1-Sep-14 9:27

Hello

I'm trying to open the COM Port on a Windows CE Device in C++ but without any success
I'm sure that the port exist and available becaus I can use it from cSharp

To do it with C++ I'm trying to use the CreateFile method

The first issue was that CreateFile needs a LPCWSTR
And as it is a long time that I did'nt work with C++ in Windows I had to find ho to assign a LPCWSTR Pointer

So here is my attempt
But it give an Error 2 during execution

NB : I've also tryed different declaration of the Com port but with the same bad result

wchar_t tt[]=L"COM5";
wchar_t tt[]=L"COM5\0";
wchar_t tt[]=L"COM5:";
wchar_t tt[]=L"COM5:\0";}

I can't believe that there is no way to open the Com port on Win CE in cSharp

Thanks for any help

wchar_t tt[]=L"COM5";
 int len=0;
 int result=0;
 char *buffer;
 DWORD dw;

 hComm = CreateFile( tt,
       GENERIC_READ | GENERIC_WRITE,
       0,
       0,
       OPEN_EXISTING,
       NULL,
       NULL);
   if (hComm == INVALID_HANDLE_VALUE)
   {
         dw=GetLastError();
   }

Re: C++ Open the COM Port on Windows CE Device

CPallini1-Sep-14 9:52

CPallini

1-Sep-14 9:52

As far as I know, CreateFile's first argument must be a LPCTSTR.

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

Re: C++ Open the COM Port on Windows CE Device

baranils1-Sep-14 19:06

baranils

1-Sep-14 19:06

Great !
You help me a lot

1- It is LPCTSTR indeed
2- The column is required

This is working

LPCTSTR portname = L"COM5:";

int len=0;
int result=0;
char *buffer;
DWORD dw;

hComm = CreateFile( portname,
      GENERIC_READ | GENERIC_WRITE,
      0,
      NULL,
      OPEN_EXISTING,
      NULL,
      NULL);
  if (hComm == INVALID_HANDLE_VALUE)
  {
  dw=GetLastError();
  int uu=5;
  }

Re: C++ Open the COM Port on Windows CE Device

CPallini1-Sep-14 19:43

CPallini

1-Sep-14 19:43

The correct way to set the LPCTSTR is:

C++

LPCTSRT portname = _T("COM5:");

As far as I know, the column is NOT required.

By the way, you are welcome.

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

Re: C++ Open the COM Port on Windows CE Device

Randor 2-Sep-14 12:14

Randor

2-Sep-14 12:14

Hi,

CPallini wrote:
As far as I know, the column is NOT required.

It is required. Alternatively the full device namespace path can be used: "\\\\.\\COM1"

Best Wishes,
-David Delaune

Re: C++ Open the COM Port on Windows CE Device

CPallini2-Sep-14 20:25

CPallini

2-Sep-14 20:25

Randor wrote:
It is required

Is it a CE thing or this very MSDN example[^] is wrong?

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

Re: C++ Open the COM Port on Windows CE Device

leon de boer2-Sep-14 21:53

leon de boer

2-Sep-14 21:53

It is quite specific under CE

http://msdn.microsoft.com/en-us/library/aa517318.aspx[^]

Could not be more clear =>
When lpFileName points to a COM port to open, you must include a colon after the name. For example, specify COM1: to open that port. When using IrCOMM, specify COM3:.

In vino veritas

Re: C++ Open the COM Port on Windows CE Device

CPallini2-Sep-14 21:59

CPallini

2-Sep-14 21:59

OK, got it, thank you very much.

By the way: Microsoft, oh my God! Smile | :)

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

How to fix the first column of a CListView in MFC

sma123#31-Aug-14 23:57

sma123#

31-Aug-14 23:57

Hi All,
Can anyone plz help me to freeze the first column of a CListView, on horizontal scroll the first column should be freezed and remaining columns should move.
I am using MFC.

Any sample is more appreciated.

Thanks,
SMA

Re: How to fix the first column of a CListView in MFC

David Crow2-Sep-14 3:50

David Crow

2-Sep-14 3:50

See here.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

Another academic question - ANSI C standard on optional function parameters

Vaclav_31-Aug-14 8:01

Vaclav_

31-Aug-14 8:01

What is a current C ( ANSI C) standard on putting <b>optional</b> parameters / attributes into function?
Or is there such a thing - ANSI standard _ anymore?
"Popular" microprocessor compiler does not allow such thing and "workaround" is function overloading.
Which IMHO in memory limited device adding more similar functions into code does not make much sense, unless you are memory chips salesman.
Cheers Vaclav

Re: Another academic question - ANSI C standard on optional function parameters

Richard MacCutchan31-Aug-14 20:47

Richard MacCutchan

31-Aug-14 20:47

You could get around it by using the main pattern, where the first parameter tells the function how many items are in the array pointed to by the next; i.e.

C++

int function(int count, void** somepointer)
{
// count tells how many items in the array pointed to by somepointer
// which may point to any type depending on requirements
}

Re: Another academic question - ANSI C standard on optional function parameters

CPallini1-Sep-14 4:24

CPallini

1-Sep-14 4:24

ANSI C only provides variable number of arguments, via the va_list, va_start, va_arg, va_end mechanism. See, for instance here[^].

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

Re: Another academic question - ANSI C standard on optional function parameters

Vaclav_1-Sep-14 5:33

Vaclav_

1-Sep-14 5:33

Thanks, but I may have messed up my question.
What I was looking for - is this syntax ANSI C standard
function(int a, int b = 0)
Where passing the second parameter in function call is optional.
Cheers Vaclav

Re: Another academic question - ANSI C standard on optional function parameters

Richard MacCutchan1-Sep-14 6:52

Richard MacCutchan

1-Sep-14 6:52

No, that's C++; there is no overloading in C.

See http://msdn.microsoft.com/en-us/library/cts394c0.aspx[^].

Re: Another academic question - ANSI C standard on optional function parameters

Vaclav_1-Sep-14 7:55

Vaclav_

1-Sep-14 7:55

Now I am totally lost.
I thought overloading was having same function name with different types of variables.
Such as
function(int)
function(void*)
function(double)
That works fine in Arduino C++ compiler.( And right now I have a bug in my code because I am using it).

I am assuming Arduino compiler is C++, did not really try to find out.
But since it works with classes....it must be C++ based.
Cheers Vaclav

Re: Another academic question - ANSI C standard on optional function parameters

CPallini1-Sep-14 9:39

CPallini

1-Sep-14 9:39

Vaclav_Sal wrote:
I thought overloading was having same function name with different types of variables.
Such as
function(int)
function(void*)
function(double)

You thought right.

Vaclav_Sal wrote:
That works fine in Arduino C++ compiler

As it should: after all is a C++ compiler.

You have to understand that C and C++ are two different programming languages. While C++ supports function overloading, C does not.

THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?!
-- C++ FQA Lite

Re: Another academic question - ANSI C standard on optional function parameters

Richard MacCutchan1-Sep-14 21:23

Richard MacCutchan

1-Sep-14 21:23

The following defintion is implied overloading since you can call it in one of two ways.

C++

function(int a, int b = 0);

//
function(1, 2); // two parameters with explicit values

//
function(1); // one explicit and one implicit (0) parameter

Re: Another academic question - ANSI C standard on optional function parameters

Vaclav_2-Sep-14 8:11

Vaclav_

2-Sep-14 8:11

OK, I did try this

void TestFunctionA (int a, int b = 100)
{
a += 1;
b += 10;
Serial.print(b);

}

void TestFunctionB (int a)
{
a += 1;
// b += 10;
Serial.print(a);

}

and calls

TestFunctionB (10); // int a, int b = 100)
TestFunctionA(10,234);

And the compiler said too many arguments in function call
But if I change the b to float it compiles and it does makes sense to me. Partially.
If the b parameter b is not passed, than the function A will be executed and compiled.
Confusing, yes.
But that was not the reason I asked. In "real" C compiler when a parameter is declared optional the code will compile without having to change all function calls to include the optional parameter.

But I still do not know if that is ANY standard or just MS compiler specific.

But Arduino compiler expects the "optional" parameter, so it is really not optional.

Cheers Vaclav

Re: Another academic question - ANSI C standard on optional function parameters

Richard MacCutchan2-Sep-14 20:31

Richard MacCutchan

2-Sep-14 20:31

That does not make any sense at all, you are using two different functions.

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