Re: How to display a gray icon - C / C++ / MFC Discussion Boards

Furno Gianluca24-Jun-06 7:09

24-Jun-06 7:09

Hi everyone!

I need to compute a *PRECISE AND ACCURATE* BOUNDING rectangle around a text

I tried with several methods with Windows32 API(s)

- GetTextExtentPoint32
- DrawText (with DT_CALCRECT)
- GetCharWidth32 (Obtaining the width of every char of the string)

I'm using MM_ANISOTROPIC mapping into my device context and seems that the X-Extension of the text is always different by the effective text drawned into the device. This happen when the zoom/scale factor is different by 1.0

What i'm doing of wrong?
Please help me
Mad | :mad:

Thank you
Furno Gianluca

C# and C++ and COM variables

Dave_Roach24-Jun-06 6:35

Dave_Roach

24-Jun-06 6:35

All,

I have written a COM Object in C++. I have a C# application that calls this COM object. One method in the COM object requires a variable to be modified to inform C# of an error. I create a variable of type Object in C Sharp and pass it by reference to the COM method. The com method receives this variable as a VARIANT*. In my C++ method I use variant_t to assign the integer value I want and assign it to the VARIANT* passed to the COM Method. This seems to work well in Debug mode but in Release I get the following error:

An unhandled exception of type 'System.NullReferenceException' occurred in CSharp Test Harness.exe

Additional information: Object reference not set to an instance of an object.

Can anyone help unscramble what I am doing wrong or offer a suggestion as to how to code this properly.

Kind regards

Dave

CWnd::OnEnable and CWnd display

Gilles0660024-Jun-06 5:52

Gilles06600

24-Jun-06 5:52

Hello everybody,

i have a problem with the OnEnable method : once it is used, the normal
display of the CWnd item doesn't work well (not fully grayed if disabled). A
possible workaround is the call the CWnd::RedrawWindow() inside the OnEnable
method, but it works only with VC++8, and i developp with VC++7.

Does anyone of you have a fix for this problem with VC++7 ?

Thanks
Gilles06600

Re: CWnd::OnEnable and CWnd display

ovidiucucu25-Jun-06 5:24

ovidiucucu

25-Jun-06 5:24

What is that "CWnd item" which "doesn't work well"? A control?
Did you call the base class OnEnable method, like for example:

void CMyButton::OnEnable(BOOL bEnable) 
{
   CButton::OnEnable(bEnable);
   // My cool code here...
}

Ovidiu Cucu
Microsoft MVP - Visual C++

Re: CWnd::OnEnable and CWnd display

Gilles0660026-Jun-06 0:39

Gilles06600

26-Jun-06 0:39

Hello,

you are right, to get the default enabling/disabling behavior of the CWnd, i have to call the base class method. I thought that the OnEnable method was just an empty shell provided by the MFC framework to put some extra code, but i was wrong. It really does some process.
So thank you for your help, my problem is solved

Gilles06600

Re: CWnd::OnEnable and CWnd display

ovidiucucu29-Jun-06 2:44

ovidiucucu

29-Jun-06 2:44

It just calls the default window procedure which does its job:

_AFXWIN_INLINE void CWnd::OnEnable(BOOL)
	{ Default(); }

LRESULT CWnd::Default()
{
   // call DefWindowProc with the last message
   _AFX_THREAD_STATE* pThreadState = _afxThreadState.GetData();
   return DefWindowProc(pThreadState->m_lastSentMsg.message,
      pThreadState->m_lastSentMsg.wParam, pThreadState->m_lastSentMsg.lParam);
}

You are welcome! Smile | :)

Ovidiu

How to display a gray icon

xuwenq8824-Jun-06 5:31

xuwenq88

24-Jun-06 5:31

it's a colorful icon or say it's 256 colors;
I want to load this icon to be a gray one!
is it existing a way to load ?
or it's impossible, on the other hand ,we shall prepare a gray one !
can it to be a gray one?
if it will do, how I load it?

waiting for answers!

Just my interest for these common things

Re: How to display a gray icon

ovidiucucu25-Jun-06 5:06

ovidiucucu

25-Jun-06 5:06

If you want a monochrome icon then no sweat.
Call ::LoadImage and pass LR_MONOCHROME as load option.

HICON hIcon = (HICON)::LoadImage(AfxGetResourceHandle(), 
                                 MAKEINTRESOURCE(IDI_ICO_256COLOR),
                                 IMAGE_ICON,
                                 0, 0,
                                 LR_MONOCHROME);

If you want a grayscale one, better is to "prepare" it yourself. There are tools that convert color icons to grayscale and Irfan View[^]is a free one.
Import the gray icon in your project resources, then load it like any others.

Ovidiu Cucu
Microsoft MVP - Visual C++

i need gedir simulation

nadeemali24-Jun-06 5:24

nadeemali

24-Jun-06 5:24

helloy all
i need some programs about gedir algorithm
in c++ language
or any links about it
thanks for all

How to distinguish start method

chenxiujie24-Jun-06 3:05

chenxiujie

24-Jun-06 3:05

Hello !

Who can tell me how to distinguish the following case:
case1: Prog.exe is started by double click.
case2: Prog.exe is started by operating system.
case3: prog.exe is started by other program.(for example： ShellExecute())

Distinguish means in the prog, to distinguish.

Thanks!

Re: How to distinguish start method

Jun Du24-Jun-06 3:57

Jun Du

24-Jun-06 3:57

It's a very interesting question, but I'm not sure there is a way. Just for curiosity, why do you want to distinguish them?

Best,
Jun

Re: How to distinguish start method

chenxiujie24-Jun-06 14:08

chenxiujie

24-Jun-06 14:08

, the requirement is that:
There is a program (let's name it A.exe), if user double click the A.exe, it doesn't reponse, by other words, user can't start it by double click.
But the A.exe can be started by another program B.exe, and
after user setting, the A.exe can start when the user log in the system(XP or vista).

Best Regards,

Re: How to distinguish start method

Jun Du24-Jun-06 15:51

Jun Du

24-Jun-06 15:51

I'm not quite clear about this requirement:

chenxiujie wrote:
after user setting, the A.exe can start when the user log in the system(XP or vista).

Best,
Jun

Re: How to distinguish start method

Jörgen Sigvardsson24-Jun-06 23:21

Jörgen Sigvardsson

24-Jun-06 23:21

If you require prog.exe to be started with a parameter, you'll foil all double click attempts. For instance, "prog.exe" just terminates, but "prog.exe /run" makes it run.

--
100% natural. No superstitious additives.

Visual C++ Compiling (Borland)

Peter Charlesworth24-Jun-06 3:00

Peter Charlesworth

24-Jun-06 3:00

Hi guys, I've got a quick question.
I have the Borland 5.5 C++ compiler and in order to compile standard C++ code, you type 'BCC32 filename.cpp' in the command screen to compile "filename".
In order to compile a Visual C++ application, you need to add a parameter or setting to that command.
My question is which one is it? I've done it before so I know how it's done, but I've forgotten the exact line and I can't seem to find it on the huge place we call the internet.

Thanks for answering such a stupid question in advance!

Re: Visual C++ Compiling (Borland)

Maxwell Chen24-Jun-06 20:29

Maxwell Chen

24-Jun-06 20:29

cl /EHsc sample.cpp

Maxwell Chen

Re: Visual C++ Compiling (Borland)

Peter Charlesworth25-Jun-06 0:48

Peter Charlesworth

25-Jun-06 0:48

Hmm

That doesn't seem to work.
"cl" is not recognised as being an application, command or batchfile and I'm positive that what I'm referring to was this:

<br />
"BCC32" line "sample.cpp"<br />

with "line" being the extra line which I have forgotten. I think there was a "-" preceding the line, but I'm not sure.
QUite frustrating to have forgotten the line, but my copmiler won't compile a Visual C++ app without the little line.

Thanks for your help anyways!

Re: Visual C++ Compiling (Borland)

Maxwell Chen25-Jun-06 5:54

Maxwell Chen

25-Jun-06 5:54

Peter Charlesworth wrote:
That doesn't seem to work.
"cl" is not recognised as being an application, command or batchfile

You have to run vcvars32.bat to initialize those environment settings before your invoking CL.exe command.

From MSDN Library:

The vcvars32.bat file sets the appropriate environment variables to enable 32-bit command-line builds.

Maxwell Chen

Transcoding

Ranvijay Singh24-Jun-06 2:11

Ranvijay Singh

24-Jun-06 2:11

Hi, I want to convert mp3 into wma format using win32. Is there any way to achieve this?

Thanks.
Vijay

about static control

happy_ram24-Jun-06 1:51

happy_ram

24-Jun-06 1:51

i ahve a dialog when i place mouse on button i static text i should get button when i place mouse on edit i should get edit.it's working fine.
but before showing edit it just's shows button after that it shows edit.
how should i over come this
sree.

Re: about static control

Jun Du24-Jun-06 2:24

Jun Du

24-Jun-06 2:24

Could you clarify your question a bit?

Best,
Jun

Re: about static control

happy_ram24-Jun-06 2:30

happy_ram

24-Jun-06 2:30

ok i have one main dialog and one popup dialog.if mouse move then we get the realted text in the static text in the edit box.i get this.when i move from one point to another first i get the previous text after that we r getting the present pointed text.taht is the problem,
sree.

RichEdit Problem

Anh_Tuan24-Jun-06 0:11

Anh_Tuan

24-Jun-06 0:11

Usually, when you have an image or object embedded in a richtext document you can interact with it like editing or resizing. Confused | :confused:

Is there anyone who knows how to disable user interaction with these objects?

Thanks,

Jup

How to terminate a process gently

chenxiujie24-Jun-06 0:08

chenxiujie

24-Jun-06 0:08

Hello,
Process A want Process B to quit. How to do can give the Process B enough time
to do something release.
Please give me some suggestion, thank you !

Re: How to terminate a process gently

Sam Hobbs24-Jun-06 0:21

Sam Hobbs

24-Jun-06 0:21

Have you seen MS KB article 178893 ("HOWTO: Terminate an pplication "Cleanly" in Win32")?

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