C / C++ / MFC Discussion Boards

Re: read from comport problem

quarry_0629-Jul-05 8:15

quarry_06

29-Jul-05 8:15

hey thanks for the answer

if (strchr(szBuffer,EOF_Char))<br />
						fContinue = false;

I think the problem is, that this never happens.

so it gets stuck in this while loop, where there is a function
lLastError = serial.WaitEvent();
but nothing happens here neither. how can interupt this loop?

thanks

Re: read from comport problem

Bob Stanneveld1-Aug-05 1:01

Bob Stanneveld

1-Aug-05 1:01

Hello,

I think your problem is that you wait forever for an event. So I guess that no event arrives on your COM port and that you are stuck in the WaitEvent() function.

See if this helps:

lLastError = serial.WaitEvent(NULL /* no overlapped IO */, 100 /* wait 100 ms */);
if( lLastError == ERROR_TIMEOUT )
{
    // no event arrived in the specified time interval
}

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Web Services from VC++ 6.0

carks28-Jul-05 8:21

carks

28-Jul-05 8:21

Hi All,

Ive got a project which was developed in Visual C++ version 6.0.

Now Ive got to make it access a web service to get data from a database...

First of all im COMPLETELY ignorant on these matters, but i suppose we've all got to take the plunge sometime...

I know that in the Visual Studio .NET version there are some tools to "automatically" generate the volumes of code required to do the web service method accessing stuff, but I dont want to change to .NET just to do this little thing!

Is there a simple generalized web service accessing API which wraps all the crap required to access a web service into a few simple routines?

Ive been looking around the net but im not convinced that Ive found the perfect solution.

Thanks in advance for any pointers,

Dave

Re: Web Services from VC++ 6.0

fakefur28-Jul-05 10:05

fakefur

28-Jul-05 10:05

Search here on CP for an article by Anders Molin. It has a class that does exactly what you are looking for.

Re: Web Services from VC++ 6.0

Ravi Bhavnani28-Jul-05 10:16

Ravi Bhavnani

28-Jul-05 10:16

I wrote CWebResourceProvider[^] to solve exactly this kind of problem! You can find robust applications of this class here[^] and here[^].

/ravi

My new year's resolution: 2048 x 1536
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ravib@ravib.com

Help me... Rich Edit

Aqueel28-Jul-05 8:18

Aqueel

28-Jul-05 8:18

Now I am able to read data from a .rtf file and write its contents in a rich edit control. Now I want to include this .rtf file as a resourse (just like we include bitmap), to print its contents in a rich edit control. Please can anyone tell me how can i do that?

Thank you
Aqueel A. Mirza

We Believe in Excellence

Re: Help me... Rich Edit

John R. Shaw28-Jul-05 8:51

John R. Shaw

28-Jul-05 8:51

Goto the resource pane: right click on the on the root node of the list and select import.
OR
Insert->Resource->Import
OR
Ctrl+R

You should be able to figure out the rest from there.

Good Luck!

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: Help me... Rich Edit

David Crow28-Jul-05 9:49

David Crow

28-Jul-05 9:49

Here is a somewhat related example.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Child Dialog Background Color

liehann28-Jul-05 8:12

liehann

28-Jul-05 8:12

Hi,

I have a class derived off CDialog that I use as a child dialog in a tab control.

The problem I have is that the background of the dialog is gray but the tab control's background is white (xp look).

How can I get the child dialog's background to be the same color as the tab control's background?

I would prefer not to have to change the tab control as I'm using a class from a library and I would like to have a general solution that applies not only to tab controls but any parent window.

I tried overriding OnEraseBkgnd and calling
HBRUSH hBrush = (HBRUSH) GetParent()->SendMessage(WM_CTLCOLORDLG, m_hWnd);
and using the returned hBrush to fill the dialog's client area but that threw exceptions.

I've also tried not erasing the background.

Any help would be appreicated.

Regards,

Liehann

Re: Child Dialog Background Color

Alexander ^M.,28-Jul-05 9:32

Alexander ^M.,

28-Jul-05 9:32

The window class adjusts the (normal) background color. The easiest way to override these settings is to handle WM_ERASEBKGND with TRUE as return (to prevent flickering) and handle WM_PAINT to paint the background (e.g. CDC::FillSolidRect).

Don't try it, just do it! Wink | ;-)

Re: Child Dialog Background Color

liehann28-Jul-05 21:01

liehann

28-Jul-05 21:01

Thanks for the reply.

How can I get the parent window's background color in OnPaint?

'needs to have dll-interface' warning

Themis28-Jul-05 7:39

Themis

28-Jul-05 7:39

Hi,
I need some help with dlls. It's my first time writting dlls and I have a minor problem.

<br />
#ifdef MYPROJ_EXPORTS<br />
#define _myprojExport __declspec(dllexport)<br />
#else<br />
#define _myprojExport __declspec(dllimport)<br />
#endif<br />
<br />
class _myprojExport MyClass<br />
{<br />
...<br />
protected:<br />
	typedef std::list<std::string> StringList;<br />
	StringList mylist;<br />
};<br />

As you can see on the above code I have MyClass which is a simple class that I export. When mylist member is missing everything is compiled smoothly, however when I have mylist member variable on the class I get the following warning from my compiler (VS .NET 7.1).

warning C4251: 'MyClass::mylist' : class 'std::list<_Ty>' needs to have dll-interface to be used by clients of class 'MyClass'
with
[
_Ty=std::string
]

How can I create a dll-interface for std::list? I don't have to export std::list the client will find its implementation in <list>. How should I declare mylist in order to get rid of these warnings?

Thanks in advance,
Themis

#define a comment to remove code?

Giles28-Jul-05 6:31

Giles

28-Jul-05 6:31

Anyone know if this is possible.

I know I can define a function to do that kind of thing......

#ifdef DEBUG
# define STUFF(x) x
#else
# define STUFF(x)
#endif

but what I would like to be able to do is define something so that I could just make the compiler ignore the line.

#ifdef DEBUG
# define ONLY_DEBUG cout
#else
# define ONLY_DEBUG //
#endif

e.g. ONLY_DEBUG << "this is a debug build" << endl;

This is only an example I know I can use TRACE etc, its been able to get rid of something in debug, short of having #ifdef DEBUG around it.

Re: #define a comment to remove code?

Alexander ^M.,28-Jul-05 9:00

Alexander ^M.,

28-Jul-05 9:00

I don't think that it's possible to set a comment as define.
Why don't you create a define like that:

#ifdef _DEBUG
#define DPRINT( x ) cout << x << endl
#else
#define DPRINT( x )
#endif

Don't try it, just do it! Wink | ;-)

Re: #define a comment to remove code?

Bob Stanneveld28-Jul-05 19:21

Bob Stanneveld

28-Jul-05 19:21

Hello,

Why don't you just try it? I think that it is possible, since you canno't use '//' comments in macro's since it will erase some of your code when the preprocessor expands it to a single line...

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

modeless and modal child dialogs

23_44428-Jul-05 6:12

23_444

28-Jul-05 6:12

I'm creating a modal child dialog and a modeless child dialog to learn about them.

I have a simple SDI application that calls the dialogs.

The modal child dialog derived from CDialog opens up behind the mainframe and does not have the focus, nor is it ever able to obtain the focus once I find it, i.e. title bar remains grayed and cannot click on any buttons on the modal child dialog. Properties of the dialog are child and visible.

CModalChild cmd;
cmd.DoModal();

The modeless child dialog opens up as it should but does not have the focus nor is it ever able to obtain the focus, i.e. the title bar remains greyed although the modeless child dialog is functional.

if (!m_pModelessChildDialog)
m_pModelessChildDialog= new CModelessChild;

if (!::IsWindow(m_pModelessChildDialog->GetSafeHwnd()))
m_pModelessChildDialog->Create(IDD_DIALOG6, this);

m_pModelessChildDialog->ShowWindow(SW_SHOW);

Hope someone can help me understand this. Thanks.

Re: modeless and modal child dialogs

zon_cpp28-Jul-05 7:45

zon_cpp

28-Jul-05 7:45

Hello.
In the SDI project, you should show your dialogs after created the mainframe class. You should calling the DoModal or ShowWindow Founctions in the your view class.
excuse me if my sentences are not complete. because, I don't know english well.

Zo.Naderi_Iran

Re: modeless and modal child dialogs

23_44428-Jul-05 8:15

23_444

28-Jul-05 8:15

Thanks Zo. Yes both are being called from the Mainframe's view class but still the problems.

Re: modeless and modal child dialogs

Neelesh K J Jain28-Jul-05 10:12

Neelesh K J Jain

28-Jul-05 10:12

I think, even though u r calling DoModal() on modal dialog box, the main focus is present on the view and mainframe and the Menu is grayed may be because you may have attached the menu to the dialog box instead to the main window. Try attaching the menu to the main frame window.

Work hard and bit of luck is KEY to SUCCESS.

Re: modeless and modal child dialogs

Anonymous28-Jul-05 10:15

Anonymous

28-Jul-05 10:15

Thanks, but no menus involved. Just the form view calling a modal child dialog via a button and the form view call a modeless child dialog via another button.

How to get the handle for the drop down button of a Combo Box Control?

lulacapixaba28-Jul-05 5:33

lulacapixaba

28-Jul-05 5:33

I want to get the handle for the drop down button of a Combo Box control.
I tested the following code but the drop down button doesn't seem to be a child of the CComboBox:

...

CWnd* pChild = this->GetWindow(GW_CHILD);<br />
hwndChild=pChild->GetSafeHwnd();<br />
::GetClassName(hwndChild, szClassName, 256);<br />
if(!memcmp(szClassName, "Edit", sizeof("Edit")))<br />
{<br />
   // The following line returns a NULL pChild<br />
   // which means, the Combo Box has only one<br />
   // child... the CEdit control. Remember that<br />
   // the list box is not actually a child of the<br />
   // CComboBox. It is a top level window.<br />
<br />
   // Try to get the sibling window... Is the<br />
   // button another child of the CComboBox?<br />
   pChild = pChild->GetWindow(GW_HWNDNEXT);<br />
<br />
   if(pChild)<br />
   {<br />
      // Never gets here!!!<br />
      hwndChild=pChild->GetSafeHwnd();<br />
      ::GetClassName(hwndChild, szClassName, 256);<br />
   }<br />
}

...

Any ideas? Confused | :confused:

Thanks,

Lula Capixaba

Re: How to get the handle for the drop down button of a Combo Box Control?

toxcct28-Jul-05 6:06

toxcct

28-Jul-05 6:06

lulacapixaba wrote:
the drop down button doesn't seem to be a child of the CComboBox

of course it isn't, otherwise how could it be itself a par of the conbobox ?

A ComboBox can be see as a set of 3 controls encapsulated into once : an editbox, a listbox and a button.

about accessing one of these parts, i really don't know how to do, and am waiting with interest for an answer too, but i think you should search for Owner Drawn control...

ps: just curious, what are you trying to do with this button ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: How to get the handle for the drop down button of a Combo Box Control?

John R. Shaw28-Jul-05 9:10

John R. Shaw

28-Jul-05 9:10

I've just researched this problem; conclusion:
There is no button to get, the button is drawn by the control and is not a child window.

Where I looked: MSDN, PUI library code (see CP article) and I used spy to double check my conclusions.

I assume you want to control over how the button is drawn. In which case look at the PUI library code, plus other articles on drawing Win2000 and WinXP style minues a buttons.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: How to get the handle for the drop down button of a Combo Box Control?

lulacapixaba28-Jul-05 22:17

lulacapixaba

28-Jul-05 22:17

Thanks John. I think you are right.

Lula Capixaba

Drag n Drop with remote files

Henrik Pettersson28-Jul-05 4:55

Henrik Pettersson

28-Jul-05 4:55

I'm developing a network app with a listview that shows files that can either be cached locally or only on the server. I have implemented the listview as a drop source and it downloads files that are selected when initiating the drag.

Now to the problem. I'm setting the file paths in the drop object, however those files that does not exist locally must be downloaded before it can be physically copied to the drop target.

Is there a way to make the explorer drop target wait for my app to finish downloading it's files and then receiving all the paths ( So the user will get the little plus sign when dropping it on the explorer window ).

Any ideas would be most welcome! Rose | [Rose]

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