Process Status - C / C++ / MFC Discussion Boards

Re: passing variables between Doc and View in MDI

2-Jul-02 5:03

HEY!!!!!!!!

That was awesome! That reply came so quick! And it hella worked.

Thank you, Outlaw Programmer. You da man!

-<>-

want to set a variable from a view in a different document

ns2-Jul-02 4:14

2-Jul-02 4:14

If this is confusing, please just read my summary. Thats what my ultimate goal is:

I am trying to communicate information received in a View (which is associated with doc1) to Doc2 so it can update View2.

First question is that if I put a button on my view and in the click event try to set the doc2 public variable directly (like Doc2::var = abc), it says that its illegal to access a data member from a static variable.

So I put a setvariable() function in doc1, and tried to create an object of type doc1 in view2 to set the variable (which I dont think is going to do what I want because of the way the document is created from the template). Anyways turns out that doc1() constructor is protected in order to use the dyn_create stuff.

I suppose making the classes friends might allow me access, but the view (view1) I eventually want to use to display info from view2, is created from a template so it wont be communicated to by the simple doc1 object that I am trying to make.

Summary:

I call a dll in view2, and want to give the info received in view2, to be seen in view1. THis I realize has to be done via doc1, but I am not able to figure out how to transmit this info to doc1.

Additional question: In response to a button click on view2, if I can successfully change the value of a variable in doc1, how do I updateallviews()? I dont want to click a ,menu item in doc1 to update all views. rather I want it done automatically as soon as the variable value changes.

Re: want to set a variable from a view in a different document

#realJSOP2-Jul-02 4:33

#realJSOP

2-Jul-02 4:33

Why don't you post a user-defined message to view2 from view1, and let view1 set the variable according to an lparam value passed with the call to PostMessage?

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"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Please review the Legal Disclaimer in my bio.

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Wrong drive count ?

chen2-Jul-02 3:38

chen

2-Jul-02 3:38

Hi,

The aspi scsi based software cannot find my CDRW/DVDR ROM,
such as CDex, Audacity, Xtractor and EAC...
I have a test by using ASPI Rip justly, the log file report an error
about my cdrom is "Wrong Drive Count".

What it mean? and how get a correct drive count for the cdrom?

Thanks in advance!

chen

chen

Re: Wrong drive count ?

Mike Nordell2-Jul-02 6:31

Mike Nordell

2-Jul-02 6:31

Drop the ASPI (that is inherently unsupported by MS) and go for SPTI or at least an ASPI<->SPTI conversion layer such as akrip (at least I think they still provide it).

The error you mention is completely useless without further info.

++luck;

*.AXW ( Wizard) from DirectX 8.1 and Visual Studio 7.0

Braulio Dez2-Jul-02 3:35

Braulio Dez

2-Jul-02 3:35

Hi,

I have installed VStudio 7.0 on my computer, then I wanted to install DirectX 8.1 SDK in my machine but..., it seems that VStudio 7.0 doesn´t accept or import the wizards from Dx 8.1, what can I do ? Is there anyway to import them ?

Thanks, greetings
Braulio

Re: *.AXW ( Wizard) from DirectX 8.1 and Visual Studio 7.0

Jeremy Falcon2-Jul-02 6:41

Jeremy Falcon

2-Jul-02 6:41

I don't know this for sure (just a guess), so bear with me. But, the wizards in the DX SDK work with VC6, and I think even with 8.1 they still only work with VC6. I still haven't tried to use DX and VC7 together, so I don't know for sure.

Jeremy L. Falcon<nobr>
Homepage : Sonork = 100.16311

"Half the reason people switch away from VB is to find out what actually
goes on.. and then like me they find out that they weren't quite as good
as they thought - they've been nannied." - Alex, 13 June 2002

Process Status

Phil.Benson2-Jul-02 2:51

Phil.Benson

2-Jul-02 2:51

Does anybody know how to get extended information about a process under NT4/2000?
I have the ProcessID, therefore I can get a handle etc. but I need to know if the process is still
active(i.e. GetExitCodeProcess(hProcess, &dwExitCode)) does not help, if dwExitCode == STILL_ACTIVE the process could still be hung.

Thanks

Re: Process Status

Scott H. Settlemier2-Jul-02 3:10

Scott H. Settlemier

2-Jul-02 3:10

enumerate the thread's windows (EnumThreadWindows) and try
sending message with a timeout (SendMessageTimeout) to see
if there is responsiveness.

Re: Process Status

#realJSOP2-Jul-02 3:14

#realJSOP

2-Jul-02 3:14

Use this

DWORD dwResult;
BOOL bResponding = SendMessageTimeout(hwndInQuestion,
                                      WM_NULL,
                                      0,
                                      0,
                                      SMTO_ABORTIFHUNG,
                                      5000,
                                      &dwResult);

bResponding is TRUE if the process is responding and processing messages. This is precisely the way Task Manager works.

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"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Please review the Legal Disclaimer in my bio.

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Re: Process Status

Phil.Benson2-Jul-02 3:22

Phil.Benson

2-Jul-02 3:22

Wow, thanks, that´s what I call a speedy response, thanks again !

user selects text printed by drawtext

2-Jul-02 2:50

is it possible to let the user select text that was generated by drawtext in a rect??
if yes, how??

with kind regards
barry pappot

Re: user selects text printed by drawtext

C^hris L^osinger2-Jul-02 3:16

C^hris L^osinger

2-Jul-02 3:16

no. when text is rendered it is simply pixels on a DC - it's not a character any more.

you will have to do all of it by-hand : (where is the character? is the mouse moving over it? yes, draw the character reversed, etc.). like this - an edit control implemented from scratch.
-c

Garbage collection, making life better - for weenies!

Image Processing - easy, like Sunday morning.

Re: user selects text printed by drawtext

#realJSOP2-Jul-02 5:22

#realJSOP

2-Jul-02 5:22

Yes, but you have to do it manually. Nothing automatic exists in MFC or the Windows API that allows you to do it.

I wrote an article that and posted it here that almost does what I think you want to do, but you'll probably have to modify the code so that you get the desired visual effect.

Here's a link to that article.

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"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Please review the Legal Disclaimer in my bio.

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How can I make my app to use less memory

Ola Carlsson2-Jul-02 2:18

Ola Carlsson

2-Jul-02 2:18

Hi,
I have some problems with my apps memory usage. They use a lot of memory.
How can I make my app to use less memory?

Does it matter if I use semantic

{
CMyClass c;
:
}

or

{
CMyClass *c;
c = new CMyClass();
:
delete c;
}

Do Windows use some kind of garbage collection? Then my app has been running for a while the memory usage is lesser. Why?

Grateful for all help I can get.

/Ola Carlsson, Sweden

Re: How can I make my app to use less memory

#realJSOP2-Jul-02 3:22

#realJSOP

2-Jul-02 3:22

The amount of memory required by a CMyClass object is the same, regardless of whether it's used on the stack or the heap.

Garbage collection in VC++ is non-existant. If you use the heap, use it wisely. If I have a given object new'd/deleted many times, I will usually redesign the app so that the class is defined as a global variable and new'd in InitInstance, and deleted in the app destructor. Of course, this assumes that you don't need more than a single instance of the class object.

Each app's requirements are different.

Last item of note - I'm not sure if there's a limit on the size of the stack in a 32-bit program. In 16-bit days, it was 64k, so you had to be very careful of what data you put there.

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"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Please review the Legal Disclaimer in my bio.

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Re: How can I make my app to use less memory

Mike Nordell2-Jul-02 8:10

Mike Nordell

2-Jul-02 8:10

John Simmons / outlaw programmer wrote:
Last item of note - I'm not sure if there's a limit on the size of the stack in a 32-bit program.

There is no limit here, except when the virtual memory for stack bottom reaches something else (such as a heap). Then it will surely go down in flames. Smile | :)

It can AFAIK be changed by e.g. linker flags (changing the PE flags), but to my knowledge it has never been used in production applications.

Re: How can I make my app to use less memory

Mike Nordell2-Jul-02 6:38

Mike Nordell

2-Jul-02 6:38

Ola Carlsson wrote:
Does it matter if I use semantic
[...]

Yes. If you're using heap memory your app will have larger memory footprint.

There are a number of ways you can reduce the memory size of your executable, but they always boils down to: know what you're doing and what your compiler and runtime library is doing for you.

Do Windows use some kind of garbage collection?

Absolutely not. That's your responsibility.

Then my app has been running for a while the memory usage is lesser. Why?

There could be a number of reasons. One of them could be that you just looked at what was currently committed to RAM and not the total Working Set. When you minimize any app its working set is "trimmed" (SetProcessWorkingSetsize(-1, -1); IIRC).

How can I read from Serial Port?

2-Jul-02 1:21

I need to read the serial port, but I cannot read it.

I had configure the DCB structure with baud rate of 9600, NOPARITY, 1 Stop bit, and 8 bits of ByteSize.

I can write to the port, I'm using the function WriteFile, and it works fine.

But when I attempt to read the serial port, it fails.

The code is:

ReadFile(hDevComm, chInput, 10, &dwBytesRead, NULL)

and the return value is OK and dwBytesRead 0

thanks in advance!

Re: How can I read from Serial Port?

Anders Molin2-Jul-02 1:30

Anders Molin

2-Jul-02 1:30

There's a couple of articles here on CodeProject that explains that.

Take a look here: http://www.codeproject.com/system/

- Anders

Money talks, but all mine ever says is "Goodbye!"

Maximizing Aplication

RuiSantiago2-Jul-02 1:13

RuiSantiago

2-Jul-02 1:13

Hi! This should be a easy task for most of you, and it sounds easy, but i can't find in my SDI with MFC aplication where to use WS_MAXIMIZE, but i'm not sure if this is the appropriate procedure because WS_MAXIMIZE is related to a window not an aplication, can you help me?

Thank you

Re: Maximizing Aplication

Nish Nishant2-Jul-02 1:30

Nish Nishant

2-Jul-02 1:30

void CMainFrame::ActivateFrame(int nCmdShow) 
{
    // TODO: Add your specialized code here and/or call the base class
	
    CFrameWnd::ActivateFrame(SW_MAXIMIZE);
}

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: Maximizing Aplication

RuiSantiago2-Jul-02 1:53

RuiSantiago

2-Jul-02 1:53

Thank you Nishant S, but what i see now is that the Frame maximizes but it quickly returns to its normal (not maximized) state, i tracked the int nCmdShow argument and i noticed that its value keep being 3 until it reaches a CFrameWnd function :

void CFrameWnd::InitialUpdateFrame(CDocument* pDoc, BOOL bMakeVisible)

inside this function, nCmdShow, returns to its 'default' value 1, why does this happends?

Thanks

Re: Maximizing Aplication

Nish Nishant2-Jul-02 2:05

Nish Nishant

2-Jul-02 2:05

I created a new SDI app using VC++ 6 and added the code I had shown. And the app started maximized and without a flicker as well. If it returns to a normal state for you, you must have over ridden some other functions as well.

Do this :-
(1) Create a fresh SDI app
(2) Use the code I had shown in the first post

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: Maximizing Aplication

RuiSantiago2-Jul-02 2:17

RuiSantiago

2-Jul-02 2:17

Well, i did it, and it worked, i don't know why it doesn't in my application, what do you think is most probable to be happening? What else can i look for to find where am i iver ridden other functions, i keep on debbuging but i can't find the reasin for the Frame to come back to its 'normal' state!

Thank you

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