C / C++ / MFC

std::wstring real content

12-Nov-08 0:57

See, for instance, [^].
Smile | :)

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Ahmed Charfeddine12-Nov-08 0:33

Ahmed Charfeddine

12-Nov-08 0:33

Hello there.
I have a third party libraries that is expected to deliver back parameters encoded as wide char strings.

so in my client application I just intercept and expolit their values :

void onDataFromDLL(std::wstring myStr){
//
}

my client app is MFC dlg with unicode defintion.

is there a way from there to tell that myStr content is actually wide char encoded ??
The reason is becuase of many weird results I get.

Thank you in advance.

"The Awaited Saviour", Mohammed Baqir Al Sadr

CPallini12-Nov-08 0:49

12-Nov-08 0:49

hINTModuleState wrote:
is there a way from there to tell that myStr content is actually wide char encoded ??
The reason is becuase of many weird results I get.

Usually 'the weird results' test's failure provides an hint. Roll eyes | :rolleyes:

BTW how do you call such library (what is the API exposed)?
Smile | :)

Ahmed Charfeddine12-Nov-08 3:38

Ahmed Charfeddine

12-Nov-08 3:38

The API exposed is in form of export classes with virtual handlers to be overriden.
In fact I am trying to integrate a SAX parser (from Poco C++ project).
The parser has a contenthandler with virtual methods that send back the xml tags and properties encountered.

The library can be compiled in two different ways, either by defining a certain _xxx_UNICODE symbol or not. The consequence is on the definition of a certain library exported type : XMLString (either an std::string or an std::wstring accordingly).

The parameters I collect and try to exploit in the virtual methods of the derived classes are mostly of type XMLString.

for instance :

void startElement(const XMLNode & localName..); is a virtual methods that is called each time tghe parser encounters a new XML tag.

if Poco's XML library is compiled without the _xxx_UNICODE symbol then there is no problem trying to play with the received parameters and comparing them against std::string variables content,etc
in the
The problem is when the library is compiled as unicode and that I am expected to receive the parameters content as wide chars. :

displaying the content of an XMLString (=std::wstring) in a TRACE or AfxMessageBox, or evebn trying to compare it against a value that is supposed to equal it always fails..

"The Awaited Saviour", Mohammed Baqir Al Sadr

CPallini12-Nov-08 3:42

12-Nov-08 3:42

How do you display the string content (i.e. are you doing a UNICODE build of your application)?

Smile | :)

Transparent Dialog but not control..

Ahmed Charfeddine12-Nov-08 5:19

Ahmed Charfeddine

12-Nov-08 5:19

This is how supposing localName is of type XMLString (ie std::wstring) which I want to display :

CString str;
str.Format(_T("%s"),localName.c_str());
AfxMessageBox(str);

(or even AfxMessageBox(localName.c_str()); )

my application is Unicode so the %s will cause the paramter localName in ::Format to be interpreted as widechars.

neverthless I get unregnizable things in screen.

Neverthless I now discover that when I put %S then I can understand what is displayed.
Since %S in context of Unicode app means to interprete the param as simple chars then my conclusion
is that the third party library is no doing anything like actually formatting results in wide chars.
I'm not sure of my conclusion..but the following is taken from MSDN regarding the printf :

[
S
String
When used with printf functions, specifies a wide-character string; when used with wprintf functions, specifies a single-byte–character string. Characters are printed up to the first null character or until the precision value is reached.
]

Anyway..well Poco..well..

"The Awaited Saviour", Mohammed Baqir Al Sadr

gothic_coder12-Nov-08 0:27

12-Nov-08 0:27

Hello all.. I don't know how to achieve this but i guess that's possible..
I've one dialog box and a picture control on it. I'm using CxImage Class to load and display PNG on that picture box.. Till now everything is good.. Now i've to show that PNG in a way so that it look like it's drawn on desktop screen. So for that i make my dialog transparent.. But making dialog transparent makes my picture control transparent. So no PNG is being shown. How do i overcome this problem...Or is there any way in CxImage Class to show PNG directly on desktop screen by taking DC of desktop screen..

Here is code to make dialog transparent..

SetWindowLong(hWnd,GWL_EXSTYLE,GetWindowLong(hWnd,GWL_EXSTYLE)^WS_EX_LAYERED);
SetLayeredWindowAttributes(hWnd,RGB(0,0,0),0,LWA_ALPHA);

Thanks all...

AtomAnt12-Nov-08 3:53

AtomAnt

12-Nov-08 3:53

Look into "UpdateLayeredWindow" if you want to use per-pixel blending.

AtomAnt

Hamid_RT12-Nov-08 6:00

12-Nov-08 6:00

I think I told you yesterday did you see GetDesktopWindow?

gothic_coder12-Nov-08 18:49

12-Nov-08 18:49

Yes i did.. And that'll be great if i show my PNG on desktop rather than dialog box.. I did something like this..

BeginPaint (hWnd, &ps) ;

HWND hDesktop = GetDesktopWindow();

HDC hdc =  GetDC(hDesktop);
			
CxImage image("E:\\My_Prog\\FINAL_PNG\\Res\\Test.png", CXIMAGE_FORMAT_PNG);
BOOL iReturn = image.Draw(hdc, 50, 50);

EndPaint (hWnd, &ps) ;

I get the handle of desktop and DC also.. But it didn't draw the PNG. What am i doing wrong?

Hamid_RT12-Nov-08 19:38

12-Nov-08 19:38

Its working for me of course like this:
HWND hDesktop = ::GetDesktopWindow();
HDC hdc = ::GetDC(hDesktop);
CImage image;
image.Load("f:\\1.png");
BOOL iReturn = image.BitBlt(hdc, 50, 50);

gothic_coder12-Nov-08 22:08

12-Nov-08 22:08

Ok so you're using BitBlt.. But when i use image.BilBlt it says.

"error C2039: 'BitBlt' : is not a member of 'CxImage'"

Obviously there's no member called BitBlt in CxImage Class.. So do i need to use CImage??? Does BitBlt comes under Cimage??? Or can i use BitBlt on CxImage??

Hamid_RT13-Nov-08 9:08

13-Nov-08 9:08

Yeah because I use of CImage class not CXImage article.

gothic_coder13-Nov-08 19:34

Re: Binary Search program

13-Nov-08 19:34

Alright.. Anyways i manage to Draw the PNG on desktop screen.. But the problem is that it get erases whenever any window is dragged on it.. Is there any way to refresh it???

Binary Search program

bishshoy00711-Nov-08 23:21

bishshoy007

11-Nov-08 23:21

Hello I am new to c++. Can you help me in this program.
The program is- Use binary search technique to search a user given name from an array of 10 pre-defined names. Use of array is a must. The names in the array are already sorted alphabetically.

Thanking you in advance........................................bishshoy007

CPallini11-Nov-08 23:38

Re: Binary Search program

11-Nov-08 23:38

Please don't shout.
It looks like a (simple) homework assignment (we won't do it for you, but we may help). What have you done so far? What is your trouble about?

Smile | :)

Randor 11-Nov-08 23:59

Randor

11-Nov-08 23:59

Several implementations of the algorithm are discussed here:

http://en.wikipedia.org/wiki/Binary_search[^]

Best Wishes,
-David Delaune

Re: Binary Search program

David Crow12-Nov-08 3:09

David Crow

12-Nov-08 3:09

You did not get the response you were hoping for here so you asked the very same, unedited question on a different forum. Amazing. Roll eyes | :rolleyes:

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Need cximagecrt.dll/cximagecrtd.dll

Balaram_Neni11-Nov-08 23:20

Balaram_Neni

11-Nov-08 23:20

Hi all
I am getting an error message in my application "This application has failed to start because cximagecrtd.dll was not found".

I tried to download the cximagecrt.dll/cximagecrtd.dll from net. But i couldn't able to find anywhere. Can some one please provide this for me.

Thanks in advance.

Regards,
balaram

Re: Need cximagecrt.dll/cximagecrtd.dll

enhzflep12-Nov-08 0:36

enhzflep

12-Nov-08 0:36

You get the source and the project file when you download CxImage.

Just build the CxImageCrtDll project that's inside the CxImageLib workspace.

Re: Need cximagecrt.dll/cximagecrtd.dll

Hamid_RT12-Nov-08 6:00