C / C++ / MFC

10-Jun-11 16:22

I want to develop an application with MFC,which has similar functions to Gantt chart.But I don't know how to start,please give me some advice.Many thanks in advance.

Richard MacCutchan10-Jun-11 22:50

Richard MacCutchan

10-Jun-11 22:50

It's impossible to give an answer to such questions in a technical forum. You need to analyse your requirements and figure out how you wish to represent the data in your charts. The chances are that you will be drawing lines and blocks so the GDI+[^] classes will probably be of some use.

The best things in life are not things.

Jokcy17-Jun-11 2:56

17-Jun-11 2:56

Thank you.It's really very difficulty.Let me have a try.

Cedric Moonen13-Jun-11 0:02

Cedric Moonen

13-Jun-11 0:02

Take a look at my charting control[^]High-speed Charting Control[^] article. It has support for Gantt series too.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Jokcy17-Jun-11 2:55

17-Jun-11 2:55

Thank you.I'll read it carefully! Blush | :O

ThatsAlok13-Jun-11 20:51

ThatsAlok

13-Jun-11 20:51

Jokcy wrote:
I want to develop an application with MFC,which has similar functions to Gantt
chart.

I am assuming you have 3-4 yrs of development experience in MFC. if you want to develop your own charting control, you can go through GDi and GDI+ classes, which provide you low level access to window graphics.

Otherwise google is always your good friends for developer!

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Jokcy17-Jun-11 2:58

[Win32] Threads communication

17-Jun-11 2:58

I am a green hand .Anyway,thank you all the same.I just want to train myself.

[Win32]Scroll bitmap

Member 296547110-Jun-11 12:47

Member 2965471

10-Jun-11 12:47

I draw a bitmap in the window client area

case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
memDC = CreateCompatibleDC(hdc);
SelectObject(memDC,hbmp);
GetObject(bmp, sizeof(bm), &bm);
GetClientRect(hWnd,&rcc);
			
BitBlt(hdc, 
0,0, rcc.right,rcc.bottom,
memDC, 
0,0,SRCCOPY);

If the the bitmap is bigger than the client area how can i implement VSCROLL and HSCROLL?

Re: [Win32]Scroll bitmap

Mark Salsbery10-Jun-11 16:44

Mark Salsbery

10-Jun-11 16:44

Scroll BAr Controls[^]

Mark Salsbery
Microsoft MVP - Visual C++
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Member 296547110-Jun-11 12:45

Member 2965471

10-Jun-11 12:45

In my program I have a MainThread and more WorkerThread. Suppose that at certain event (which I'll manage) the MainTh must send a string (char []) to all WorkerTh, which will then process the request and send a response to MainTh.
What methods provided by windows are more suitable to handle a similar thing?

Re: [Win32] Threads communication

Albert Holguin10-Jun-11 13:31

Albert Holguin

10-Jun-11 13:31

I usually use messages... SendMessage() and PostMessage() methods, with the latter being most appropriate for unsynchronized communications between threads...

Re: [Win32] Threads communication

lijiantao11-Jun-11 5:32

lijiantao

11-Jun-11 5:32

create event to notify mani thread that someting done .

MFC Multiple document types in SDI application

Mattias G10-Jun-11 0:55

Mattias G

10-Jun-11 0:55

Hi all,

I'm using multiple document types (e.g. *.txt, *.xml) in a SDI type application, with two CSingleDocTemplate objects that handles two different file formats. The view class is the same for both document templates. However, when opening a file of the type that isn't currently open, MFC creates a new top level frame instead of disposing of the old view. This happens in CSingleDocTemplate::OpenDocumentFile, but I'm not that happy about overriding stuff about the view/doc logic of MFC.

What I want is to keep the same frame for both document types, but from what I can read in the MFC source, the framework isn't really designed for that behaviour.

Anyone with some experience of this?

Debugging application minidump using windbg

Prasann Mayekar9-Jun-11 23:04

Prasann Mayekar

9-Jun-11 23:04

i have an MFC c++ application build with /clr option and have integrated crash reporting feature.
the crash dump it generates does not show line numbers when i debug the dump using windbg.
(i found that applications build with clr does not show line numbers)

it shows the function name where it crashed but not the exact line number. for eg

it shows:
03434456 02312434 CExApp::OnOpenFile() + 0x30c

whats 0x30c ? is it an offset in the function?
Is there any way to calculate the line number by using 0x30c ?

thanks

Re: Debugging application minidump using windbg

Sarath C10-Jun-11 2:27

Sarath C

10-Jun-11 2:27

See if your PDBs, Source file and image (exe) matches. I am not sure SOS DLL can help you with Postmortem debugging. But have a look at it[^]

-Sarath.

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C++ expression evaluation.

Sameerkumar Namdeo9-Jun-11 22:57

Sameerkumar Namdeo

9-Jun-11 22:57

Hello,

consider the following program

void main()
{
int tr = 0;
int rows = 256;
int ms = 3;
tr += (rows & (1 << (ms - 1))) << (ms - 1);
tr = rows & (~(1 << ms)); 
}

in above program have used only 3 integers...so can we consider that this program's memory requirement will be 3 integers (3*4 bytes).
or the compiler will generate some intermediate integers for storing values of expressions like
(~(1 << ms)) etc... and thus the memory requirements of this program will be more than 3 integers.

i know it all depends upon how the compiler generates the code.
but wanted to know the relation (w.r.t memory) between the variables declared and the intermediate expressions.

Or you may please direct me to appropriate resources (forums, links)for this..

Thanks.

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CPallini10-Jun-11 0:25

CPallini

10-Jun-11 0:25

If you are using Visual Studio then you have the opportunity to see the disassembly listing (for instance via the debugger or the /FA compiler option). Other compilers may provide you this facility as well.

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Luc Pattyn10-Jun-11 1:03

Luc Pattyn

10-Jun-11 1:03

It depends on the compiler, and the switch settings you apply.

A smart compiler may toss it all out as all calculations ultimately generate a value for tr which is then not used at all.
And if you were to add a function call (say print(tr);) which makes the calculations necessary, the compiler could still discover that the tr value is a constant that can be evaluated right away at compile-time, hence tossing the other variables.

Smile | :)

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Sameerkumar Namdeo12-Jun-11 20:39

Sameerkumar Namdeo

12-Jun-11 20:39

thanks..

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