Re: SetCapture problem in modal dialog - C / C++ / MFC Discussion Boards

Philip Patrick9-Jul-01 2:32

9-Jul-01 2:32

Did somebody used _declspec(property) attribute?
If yes, please tell me how!
I have such code:
[code]
class CSome{
inline long GetMicroSeconds() const
{
return m_nMicroSecs;
}
_declspec(property(put=SetMicroSeconds, get=GetMicroSeconds)) long m_nMicroSecs;

};
[/code]

And get an error "Stack Overflow". I understand why, but don't understand so how to use this attribute? Confused | :confused:

Well for now it's working with assembler inside, but i don't want to use assembler. So if somebody knows the right way, please tell me.
Thanx

Philip Patrick

Re: _declspec(property) Question

coder84729-Jul-01 2:42

coder8472

9-Jul-01 2:42

You also have to declare a member variable to store the value, and then return the member variable!

But I recomend not to use _declspec(property), because the code is harder to maintain, and it also confuses people...

And I think in Visual Studio .NET you'll get a warning or an error!

maXallion
"Look for bugs, I hate bugs!" - Warden, The Mummy
www.maxallion.de - coded evil & more

Re: _declspec(property) Question

Philip Patrick9-Jul-01 3:03

Philip Patrick

9-Jul-01 3:03

First of all - Thanx. Smile | :)

Yeah you've right when say not to use it. I don't want! But i have to. It's a part of low-level modules of my company (where i work) and everybody uses this public member. But I have to keep it not bigger than 999999 (micro). So instead of doing this variable protected and changing all code, i do it "property". That's all.
Thanx again

Philip Patrick

Re: _declspec(property) Question

Tomasz Sowinski9-Jul-01 2:44

Tomasz Sowinski

9-Jul-01 2:44

You're getting into infinite resursion - any attempt to read m_nMicroSecs is redirected to GetMicroSeconds; that's what __declspec(property) does. You need to create separate data member to hold the microseconds. There's an article dealing with this on CodeProject.

Tomasz Sowinski -- http://www.shooltz.com

Thanks a lot !

9-Jul-01 2:17

SetCapture problem in modal dialog

Christian Graus9-Jul-01 2:11

Christian Graus

9-Jul-01 2:11

I have written us a colour picker to replace the scabby Windows one, and especially with GDI+, allow us to enter alpha as well. My managet wants to be able to select colours from anywhere on the screen by clicking on them. Rather than make the dialog modeless, I decided to be cunning, and call SetCapture and then just check if I have clicked outside the dialog. I call SetCapture in OnInitDialog, and then in OnLButtonDOwn I do this:

CRect rc;
GetWindowRect(&rc);
CPoint pt = point;
ClientToScreen(&pt);
if (!rc.PtInRect(pt))
{
    CWindowDC window(NULL);
    COLORREF rgb = window.GetPixel(pt);
    UpdateData();
    m_Red = GetRValue(rgb);
    m_Green = GetGValue(rgb);
    m_Blue = GetBValue(rgb);
    UpdateData(false);
    ReleaseCapture();
    SetCapture();
    Invalidate(false);
    return;
}

I've added releasecapture and setcapture to try and solve my problem, which is this. This all works great the first time I do it, after that it won't work at all. Clicking in the dialog works, of course, but I did a debug with a breakpoint set, and OnLButton down is not called again after time if I click outside the dialog. How can I keep the Capture for as long as the dialog is running ? Do I need to run a timer ? Why doesn't it work in the function as I wrote it ? Where's that piece of rope when I need it ?

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Re: SetCapture problem in modal dialog

Tomasz Sowinski9-Jul-01 2:26

Tomasz Sowinski

9-Jul-01 2:26

Where's that piece of rope when I need it ?

Here's the rope: "Mouse capture is also affected by the Windows 95 and Windows NT localized input queues.... If the mouse is captured while the mouse button is up, the window receives mouse input only as long as the mouse is over that window or another window created by the same thread."
".

From C++ QA by Paul Dilascia, MSJ, Dec'98.

Cheers,

Tomasz Sowinski -- http://www.shooltz.com

Re: SetCapture problem in modal dialog

Christian Graus9-Jul-01 12:17

Christian Graus

9-Jul-01 12:17

Thanks.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Menu's

vijayaramaraju9-Jul-01 1:11

vijayaramaraju

9-Jul-01 1:11

How do we remove a popup menu I'm unable to get its Menu Id

thanks in Advance Rose | [Rose]

vijay

Re: Menu's

9-Jul-01 1:19

Have you tried the BY_POSITION property?

Re: Menu's

9-Jul-01 1:22

Sorry, should be "MF_BYPOSITION"

Re: Menu's

Tomasz Sowinski9-Jul-01 1:22

Tomasz Sowinski

9-Jul-01 1:22

Use MF_BYPOSITION flag with DeleteMenu/RemoveMenu.

Tomasz Sowinski -- http://www.shooltz.com

colouring in VC

vijayaramaraju9-Jul-01 1:08

vijayaramaraju

9-Jul-01 1:08

what are the valid colours RGB Values for a 256 colour mode in VC++ How would you traverse from BLUE to RED traversing All the remaining colours thanks Rose | [Rose]

Vijay

Re: colouring in VC

9-Jul-01 1:27

In 256 color mode, each color is represented by an 8 bit value. That value is an index into the color palette. Whatever the palette is set to for that index will be the "valid" color for that index. If you want to traverse from blue to red, you can create the color palette with 256 colors RGB( 255,0,0) to RGB(0,0,255 ), and than display them. Be careful though!

The Registry - complex issues

James Parker9-Jul-01 0:23

James Parker

9-Jul-01 0:23

I am trying to write a program that will backup/restore registry settings to/from a file. I have found that RegSaveKey and RegRestoreKey need administrative privileges in order to work. This is of no use to me as it needs to be used by everyone.

Firstly, does anybody know how to get round such a problem I have tampered with the security descriptor and Enabled backup and restore privileges but despite my efforts I keep getting the WinError - "1314 A required privilege is not held by the client."

Secondly, does anybody know how to manually iterate though a desired regkey and all its subkeys (e.g. HKEY_CURRENT_USER/Software) and then load or save each subkey from/to a file to/from the registry. Such a scenerio I think will get round this privilege problem

Thanks in advance. Any contribution welcome. Smile | :)

Re: The Registry - complex issues

Tomasz Sowinski9-Jul-01 0:48

Tomasz Sowinski

9-Jul-01 0:48

Maybe KB article Q128731 has some answers?

Tomasz Sowinski -- http://www.shooltz.com

Re: The Registry - complex issues

9-Jul-01 3:51

Use regedit to do it. Something like:

char szTmpPath[MAX_PATH];
char szTmpFile[MAX_PATH];
HANDLE hRegEditHnd;

// get a name of a temp file.
status=GetTempPath( sizeof(szTmpPath), szTmpPath );
status=GetTempFileName( szTmpPath,"REG",0,szTmpFile );

// format args
strcpy (szArgs,"/e ");
strcat (szArgs,szTmpFile);
strcat (szArgs," \"HKEY_CURRENT_USER\\Software\"");

hRegEditHnd= (DWORD) ShellExecute( NULL, "open",
"regedit.exe", szArgs ,
NULL, SW_SHOWNORMAL );

That will save the specified key into a standard registry file in the (guaranteed unique) file specified by szTmpFile.

You should check the status's.

database error item...

Gérald Mercet8-Jul-01 23:35

Gérald Mercet

8-Jul-01 23:35

I'm using ado to join data in excel. but when i run my application i have a message box which appears where it's written the following message:"database erroritem cannot be found in the collection corresponding to the requested name or ordinal". I use the jet oledb 4.0 to find my filename:"provider=microsoft.jet.OLEDB.4.0;Data Source=%s;Extended Properties=Excel 8.0;","test.xls" and after to find the table name: table_name=pRstSchema->Fields->GetItem("TABLE_NAME")->Value;(where pRstSchema is a _RecordsetPtr smart pointer.

The TABLE_NAME is simply selected cells (A1:B10) I have called like that with the small edit box on the left top of the excel worksheet!

If someone could tell me why it doesn't work...

Gerald

Dead | X|

overlay YUV data using direcX

8-Jul-01 20:07

Now, my YUV data is displayed in directdraw secondary surface by "UYVY" format.
But I want to know how to overlay YUY2 or YUV9 format data.
Please, teaching me how to set DDPIXELFORMAT and to write the YUV data in directdraw surface.

the same user interface as MS media player7

prog75848-Jul-01 18:10

prog7584

8-Jul-01 18:10

i'd like to design the same user interface as MS media player7. if the button positioned in the window's right edge is pressed, list-box is extended. that is very marvelous and interesting to me.
let me know how to do i implement that.
thank you

have a nice day Smile | :)

Help with Networking Code

8-Jul-01 15:01

Can anyone help me figure out how to make code for a server type of program...I want users to be able to log into my computer and play a game and I have no clue where to start with the coding of the client/server connection...So any help would be greatly appreciated.

Confused | :confused:

Thanks in advance.

Re: Help with Networking Code

Sascha Loetz9-Jul-01 0:01

Sascha Loetz

9-Jul-01 0:01

If you want to use winsock have a look at the GlobChat sample that comes with the Platform SDK (can also be found at MSDN).
It's a multiprotocol chat server that shows how to set up the basic structure of a winsock client/server application.

source code on buffer manager and page

thinker8-Jul-01 12:11

thinker

8-Jul-01 12:11

Anyone can tell me where I can find the C/C++ source code on how page and buffer manager
are implemented in a database system?
Thank you

Side control panels

8-Jul-01 12:02

Does anyone know where I can find some tutorials on how to create a side control panel. A side control panel like the one found on MS-Paint. There is a Dialog like control that is attached to the left or right side of the main view.

Re: Side control panels

Tomasz Sowinski9-Jul-01 0:51

Tomasz Sowinski

9-Jul-01 0:51

This looks like CDialogBar. Are you using MFC?

Tomasz Sowinski -- http://www.shooltz.com

Last Visit: 31-Dec-99 18:00 Last Update: 20-Sep-24 2:13

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