Re: Copying a HBITMAP to a different HBITMAP - C / C++ / MFC Discussion Boards

Christian Graus22-Nov-01 19:25

22-Nov-01 19:25

According to MSDN GetCurrentBitmap can return a temporary object, which I presume means a copy.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Disabled 256-color toolbar buttons

Erik Hammar22-Nov-01 11:06

Erik Hammar

22-Nov-01 11:06

Hi,
How can I get the disabled buttons of a 256-color toolbar to look good?

Thanks in advance,
Erik Hammar

Re: Disabled 256-color toolbar buttons

Andrew Peace22-Nov-01 14:47

Andrew Peace

22-Nov-01 14:47

I banged them into a paint program, made them greyscale, then turned the contrast down and messed with the curves.

--
Andrew.

Re: Disabled 256-color toolbar buttons

Rashid Thadha22-Nov-01 22:38

Rashid Thadha

22-Nov-01 22:38

Use Hot and Cold bitmaps

See sample here

http://www.codeproject.com/docking/toolbar_hotbuttons.asp

Copying a HBITMAP to a different HBITMAP

Chambers22-Nov-01 10:14

Chambers

22-Nov-01 10:14

Hi all (again), I`m stuck (again). I just can`t figure out how to copy a HBITMAP to a completely new HBITMAP (i.e. I don`t want them handling the same image, rather I want a new image which contains the same colours). Anyone know? I`ve tried copying the handle but that doesn`t do what I want it to do (rather obviously) since when I try modifying the new image the old one gets modified too, this is what i *don't* want. I have heard something about memcopy, but haven`t got a clue how I`d use it in conjunction with the HBITMAP and "the bits" of the DIBSection. Any help, or links or ideas or anything = very many thanks.

Cheers guys (and gals)
Alan. Big Grin | :-D

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Copying a HBITMAP to a different HBITMAP

Christian Graus22-Nov-01 10:39

Christian Graus

22-Nov-01 10:39

You need to create the second HBITMAP to be the same size, copy them both into DC's and then do a BitBlt between them. If they are both DIBSections, I'd presume you can create the second one the same size as the first and memcpy the bits from one to the other.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Re: Copying a HBITMAP to a different HBITMAP

Chambers22-Nov-01 10:58

Chambers

22-Nov-01 10:58

Thanks for the response Christian, I would love to be able to memcpy the bits from the one HBITMAP to the other (they will both be DIBSections and they will both be the same size). But how does it work, do I have to create a new HBITMAP first using CreateDIBSection and then use memcpy? If this is correct, how do I use memcpy in that situation, without creating a memory leak from losing the pointers to the original "bits". I would very much like it if you could elaborate a little bit on this direction of solution,

Many thanks, again
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Copying a HBITMAP to a different HBITMAP

Christian Graus22-Nov-01 11:06

Christian Graus

22-Nov-01 11:06

memcpy copies the contents of the memory, so what happens is this:

1/ You create a new DIBSECTION the same size and bit depth as the first.
2/ You now have two DIBSECTIONs and two pointers to byte arrays, which are the same size. You use memcpy, which copies the contents of one byte array into the other. You're not allocating memory, you're copying the values of the pixels into the location that already holds the values of the bitmap as it was created, making them identical to the first.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Re: Copying a HBITMAP to a different HBITMAP

Chambers22-Nov-01 11:15

Chambers

22-Nov-01 11:15

Many thanks Christian, I`m off to implement your suggestion, I`ll get back to you and amend this message with the results.

Thanking you lots,
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Copying a HBITMAP to a different HBITMAP

Christian Graus22-Nov-01 11:20

Christian Graus

22-Nov-01 11:20

No worries - glad to help.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Analog to CArchive in STL for data transfer via sockets?...

22-Nov-01 7:10

I'm trying to figure out how to receive/send data of different types (including standard types AND my own objects) not using MFC CSocket-CSocketFile-CArchive trio. I've got the socket part already, now I want to use << >>
to actually start transferring data. I'm new to STL but have a feeling
that's the way to go. Right? How? Or no? Confused | :confused:

Re: Analog to CArchive in STL for data transfer via sockets?...

Joaquín M López Muñoz22-Nov-01 8:43

Joaquín M López Muñoz

22-Nov-01 8:43

I don't quite catch your point, but if what you're looking for is iostream-like classes for data communication thru sockets, then please note that the C++ standard does not cover this issue. Nevertheless, iostream was designed with such kind of extensions in mind, and there are a number of libraries out there to do socket communications à la iostream. To name a few:

Socket++ is probably the most popular library in this area. Originally written by Gnanasekaran Swaminathan for UNIX environments, it's been later ported to Win32 by Greg Lavender.
Maciej Sobczak releases an iostream-compatible socket wrapper along with his article on the current (December 2001) C/C++ Users Journal issue, which in addition features other articles about C++ and sockets you might find interesting to look at.
socketstream library, written by a Korean guy whose name I haven't been able to decipher Haven't tested myself, nor do I have any reference about it.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

ReadClass & WriteClass

goupil22-Nov-01 5:43

goupil

22-Nov-01 5:43

hi, everybody

I'm using CArchive constructed on CSocketFile and i'm
trying to serialize CMsg objects like this :

(note : ar is my archive and msg my message to serialize)

ar.WriteClass(msg.GetRuntimeClass()); //it works fine
ar.WriteObject(&msg); //works fine

and at the other side of the network i have :

CRuntimeClass * pClass = ar.ReadClass(); //this throw me an error CArchiveExceptionError::badIndex

Any ideas about this ?

problem in domodel with windows 95 only .

22-Nov-01 4:55

hai all,
i am a new person who is working in vc++ fro 2 month
i am facing some problem in starting the dialog box in windows machine. whila compilng it's giving this messages is any thing missing.

Loaded 'D:\etnnew\ethnew\Release\ethnew.exe', no matching symbolic information found.
Loaded 'C:\WINNT\System32\ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\MtoMLAN.dll', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\KERNEL32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\USER32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\GDI32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\ADVAPI32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\RPCRT4.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\WINSPOOL.DRV', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\COMCTL32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\WSOCK32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\WS2_32.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\WS2HELP.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\mfc42.dll', no matching symbolic information found.
LDR: Automatic DLL Relocation in ethnew.exe
LDR: Dll qaphooks.dll base 10000000 relocated due to collision with C:\WINNT\System32\MTOMLAN.dll
Loaded 'C:\WINNT\SYSTEM32\qaphooks.dll', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\RNR20.DLL', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\RPCLTC1.DLL', no matching symbolic information found.
First-chance exception in ethnew.exe (NTDLL.DLL): 0xC0000005: Access Violation.
Loaded 'C:\MOUSE\SYSTEM\ccmsghk.dll', no matching symbolic information found.
Loaded 'C:\WINNT\SYSTEM32\msidle.dll', no matching symbolic information found.
The thread 0x201 has exited with code 120 (0x78).
The program 'D:\etnnew\ethnew\Release\ethnew.exe' has exited with code 120 (0x78). Laugh | :laugh:

Suleman

Re: problem in domodel with windows 95 only .

Matt Newman22-Nov-01 5:13

Matt Newman

22-Nov-01 5:13

Are you sure it is compiling. It looks more like it is debugging and can't find debug info.

-Matt Newman
-Matt Newman

Re: problem in domodel with windows 95 only .

Christian Graus22-Nov-01 10:46

Christian Graus

22-Nov-01 10:46

How do you mean W95 only ? The system dll's being loaded are under c:\WinNT, and 'no mayching symbolic information found' is not unusual or broken.

You need to post some code. What are the details of your project ? How was it created ?

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

How to terminate a thread from another thread

merav22-Nov-01 4:10

merav

22-Nov-01 4:10

I have a class that implements the thread operation(not
inherited from MFC)-"MyCDialogThread" - that open a CDialog on it's run method with either DoModal or create.
I create that threat from another thread and i need to kill
my "MyCDialogThread". How can that be done?

Re: How to terminate a thread from another thread

Joaquín M López Muñoz22-Nov-01 4:16

Joaquín M López Muñoz

22-Nov-01 4:16

Can you send a WM_CLOSE message to that CDialog?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: How to terminate a thread from another thread

merav22-Nov-01 4:30

merav

22-Nov-01 4:30

No. in my case - i open the dialog with DoModal and that thread donot response to any sendmessage.
The other thread that should send the SendMessage to my thread could not be proccessed until my thread(that own the CDialog)could execute, but it couldn't because my thread is blocked until it will be finished.
I read about it in Josheph M.Newcomer article "Using Worker Threads" here in the Code Project.

Re: How to terminate a thread from another thread

Carlos Antollini22-Nov-01 4:32

Carlos Antollini

22-Nov-01 4:32

Try with TerminateThread

best Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: How to terminate a thread from another thread

Joaquín M López Muñoz22-Nov-01 4:48

Joaquín M López Muñoz

22-Nov-01 4:48

Can you use a UI thread instead of a worker thread for the owner of the CDialog (and proceed then with sending WM_CLOSE)?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

a stupid question.

The_Server22-Nov-01 3:58

The_Server

22-Nov-01 3:58

Hi, All!
=======

What is IDISPATCH ?
What should I do with it?
How to use it?

10x

BTW: come to #CodeProject on DalNet (mIRC)

Re: a stupid question.

moliate22-Nov-01 5:32

moliate

22-Nov-01 5:32

IDispatch is a way for pointer-challanged programming languages to call COM components. It simply gives an extra layer of abstraction to the calling procedure.

Assuming you know what interface your IDispatch you could use it in two steps:

1) Get DISPID:s for the functions you want to call with GetIDsOfNames
2) Set parameters and call Invoke with the chosen DISPID.

Example: Calling a function showWindow(BOOL show) in IDispatch idispatch

DISPID dispid;
OLECHAR* name = L"showWindow";
idispatch->GetIDsOfNames(IID_NULL, &name, 1, GetUserDefaultLCID(), &dispid);
VARIANT arg;
arg.vt = VT_BOOL;
arg.boolVal = VARIANT_TRUE;
DISPPARAMS param = {&arg, NULL, 1, 0};
idispatch->Invoke(dispid, IID_NULL, GetUserDefaultLCID(), DISPATCH_METHOD, &param, NULL, NULL, NULL);

Or you could just QueryInterface for the interface you want..

/moliate

Failing Contructor

Dave Cross22-Nov-01 2:30

Dave Cross

22-Nov-01 2:30

Got a complex class which depends on data files opened in the constructor. Does anyone have any neat ideas about how to handle error conditions? If the files don't exist I don't want the object to be created but I can't see how to do it.

TIA

Dave Cross

Re: Failing Contructor

Michael P Butler22-Nov-01 2:54

Michael P Butler

22-Nov-01 2:54

I don't have any neat ideas, I just want to point out that the constructor is not the best place for doing a large amount of work that might fail.

Michael Smile | :)

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