Re: Multithreading in vc++ - C / C++ / MFC Discussion Boards

Re: Catching WM_POWERBROADCAST message

KarstenK11-Dec-09 1:04

KarstenK

11-Dec-09 1:04

check the power configuration settings of the operating system Unsure | :~

If it doesnt work check it on another PC, maybe on your old PC isnt all modern enough Dead | X|

Press F1 for help or google it.
Greetings from Germany

Re: Catching WM_POWERBROADCAST message

Still learning how to code11-Dec-09 1:51

Still learning how to code

11-Dec-09 1:51

It is definitely not an OS problem - the system does hibernate. Also, I know the WM_POWERBROADCAST message does get issued, as I can see it being "caught" by another project ("PowerLog" downloaded from website). So, it's definitely something to do with my implementation. For instance, does my code snippet have to be included in any particular class of the project ?

Doug

Re: Catching WM_POWERBROADCAST message

KarstenK11-Dec-09 2:04

KarstenK

11-Dec-09 2:04

are you shure that your winproc is the active one of the main window?

Press F1 for help or google it.
Greetings from Germany

Re: Catching WM_POWERBROADCAST message

Still learning how to code11-Dec-09 10:20

Still learning how to code

11-Dec-09 10:20

There is only one view - normally hidden, I admit. Surely such a messsage (WM_POWERBROADCAST) still gets to a window even if it is hidden ? (or is this my problem ?)

Doug

Re: Catching WM_POWERBROADCAST message ---------------- *** SOLVED ***

Still learning how to code13-Dec-09 12:01

Still learning how to code

13-Dec-09 12:01

For anybody that hits this problem, I thought that I would update this thread. By a process of trial and error, I found that the only class of my project that would recognise the WM_POWERBROADCAST message was CMainFrame (by overriding WindowProc() )

Doug

Multithreading in vc++

mathy10-Dec-09 20:41

mathy

10-Dec-09 20:41

Hai friends

what is multithreading, and how to use in vc++, and how to tested it...
help me plz...

Best Regard's
Mathy's

Re: Multithreading in vc++

Cedric Moonen10-Dec-09 20:47

Cedric Moonen

10-Dec-09 20:47

This subject is way too broad be explained in message on a forum. I suggest you read through the articles available here on codeproject that talk about multithreading or to google for it. Or even better, to buy a good book on the subject. You can also have a look at this excellent article[^]

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Multithreading in vc++

CPallini10-Dec-09 21:04

CPallini

10-Dec-09 21:04

mathy wrote:
what is multithreading

It is a really big topic, you're strongly encouraged to read a book about. For an introduction see [^], [^].

Multithreading is what you typically need, when, for instance, your program is performing I/O operations for a long time and you don't want the user interface hanging in the meanwhile.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Multithreading in vc++

Rajesh R Subramanian10-Dec-09 21:06

Rajesh R Subramanian

10-Dec-09 21:06

Yesterday you asked us to "explain" COM, ATL and MFC. Now you're ready for multithreading. Roll eyes | :rolleyes:

Will you PLEASE do everyone here a favour by buying a book? This forum is ONLY for asking specific queries.

“Follow your bliss.” – Joseph Campbell

Diff Between ShowWindow and End Dialog

002comp10-Dec-09 20:36

002comp

10-Dec-09 20:36

Hello Friends

What is Difference between
ShowWindow(hwndDlg,SW_HIDE) and EndDialog(hwndDlg,0)?

Which One we need to use?
Thanks & Regards
Yogesh

Re: Diff Between ShowWindow and End Dialog

Cedric Moonen10-Dec-09 20:44

Cedric Moonen

10-Dec-09 20:44

ShowWindow(hwndDlg,SW_HIDE) only hides the window (but the window still exists) and furthermore, it can be applied to any type of window (even a control for instance). EndDialog destroys a modal dialog, so the dialog doesn't exist anymore afterwards. And it can only be used for a modal dialog (it would be a bit similar as calling OnOk or OnCancel).

yogeshs wrote:
Which One we need to use?

That really depends on what you want to do Big Grin | :-D

. If you need to use only one of the functions, why would both of them exist ? They are there for a purpose and both of them can be used depending on the purpose.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Diff Between ShowWindow and End Dialog

CPallini10-Dec-09 20:55

CPallini

10-Dec-09 20:55

Usually documentation helps.

For instance MSDN on EndDialog [^]:

The EndDialog function destroys a modal dialog box, causing the system to end any processing for the dialog box.

MSDN on ShowWindow [^]:

The ShowWindow function sets the specified window's show state.

Hence, roughly speaking, the former destroys the window, the latter just hides it.

Smile | :)

Re: Diff Between ShowWindow and End Dialog

002comp10-Dec-09 21:39

002comp

10-Dec-09 21:39

thx guys

progarm code of c++

moinsheikh10-Dec-09 19:10

moinsheikh

10-Dec-09 19:10

c++ program to convert text into braille character

Re: progarm code of c++

Tim Craig10-Dec-09 19:16

Tim Craig

10-Dec-09 19:16

You just asked this same nonquestion a half an hour ago. #1 you didn't ask a question. #2 you're not likely to just be handed a program.

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Re: progarm code of c++ [modified]

Adam Roderick J10-Dec-09 19:17

Adam Roderick J

10-Dec-09 19:17

Please understand that, no one can help you by giving the whole source code.
Its better to ask, either as
"Any one have idea, how to convert a plain text into braille character programmatically. Using c or c++, Any help will be appreciated."

Well please go through Libbraille, the following link [^].
It will surely help you.

Величие не Бога может быть недооценена.

modified on Friday, December 11, 2009 1:23 AM

Re: progarm code of c++

Stephen Hewitt10-Dec-09 19:55

Stephen Hewitt

10-Dec-09 19:55

Surely a simple array is most of what's needed (maps from characters to strings, say).

Steve

Re: progarm code of c++

Michael Schubert10-Dec-09 23:43

Michael Schubert

10-Dec-09 23:43

moinsheikh wrote:
c++ program to convert text into braille character

That's a bold statement.

program c++

moinsheikh10-Dec-09 18:37

moinsheikh

10-Dec-09 18:37

c++ program to convert text into braille character

Re: program c++

Adam Roderick J10-Dec-09 19:05

Adam Roderick J

10-Dec-09 19:05

Please go through the instructions about how to ask a question [^].

Величие не Бога может быть недооценена.

Re: program c++

Sauce!10-Dec-09 19:27

Sauce!

10-Dec-09 19:27

Besides the fact that this is a terribly worded question (was there a question at all in your post?) you don't even need to write a program to convert text to braille. Simply download a braille font and make the text use that font.

If you absolutely think it's necessary to write a program to do this, then look at the section "Unicode rendering table" in the wikipedia article on braille.

Re: program c++

Rajesh R Subramanian10-Dec-09 21:08

Rajesh R Subramanian

10-Dec-09 21:08

I already answered your query here[^]. So, instead of reposting the same thing, take a look at How to ask questions the smart way[^].

“Follow your bliss.” – Joseph Campbell

why the function GetMethodID in JNI always return 0?

heavensquare10-Dec-09 14:41

heavensquare

10-Dec-09 14:41

below is C++ code

jmethodID mid;j
class cls = env->FindClass( "test/MyTest");
mid = env->GetMethodID(cls, "append","(Ljava/lang/String;I)Ljava/lang/String;"); 
mid=env->GetMethodID(cls,"HelloWord","()Ljava/lang/String;");

below is display by javap

public test.MyTest(java.lang.String);  
Signature: (Ljava/lang/String;)V
public java.lang.String HelloWord();  
Signature: ()Ljava/lang/String;
public java.lang.String append(java.lang.String, int); 
Signature: (Ljava/lang/String;I)Ljava/lang/String;

below is java code：

public String HelloWord()
 {    System.out.println("JAVA-CLASS:MyTest method:HelloWord:" +helloword);   
  return helloword;} 
public String append(String str, int i)   {       return str + i;   }

notice： the class has been found successfully， and the construct function <init> 's id is not return 0

question：why the other methods’s id always return 0？？

Re: why the function GetMethodID in JNI always return 0?

Richard MacCutchan11-Dec-09 6:19

Richard MacCutchan

11-Dec-09 6:19

I have tried this and, without seeing all your code, have made a few educated guesses. In my tests I am able to get the mid for both methods and also to call those methods. Have you run this through the C debugger to verify that all other values are correct?

Drawing in a PDF file with HPDF

softwaremonkey10-Dec-09 11:20

softwaremonkey

10-Dec-09 11:20

Hi,

I have a chart object which draws itself on a DC. I would like to be able to 'print' the chart to a PDF file using the excellent Haru HPDF library. Has anyone any suggestions on how I could do this?

I guess I could add a draw function to my class which takes a pdf page instead of a DC but is there an easier way?

Smile | :)

Tony

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