C / C++ / MFC Discussion Boards

LunaticFringe5-Oct-03 3:55

5-Oct-03 3:55

If you need a pointer to the view, just create a member variable of that type in the dialog class, and initialize it after creating, but before showing, the dialog. For instance, in the dialog header, you'd have something like

CMyView* m_ptrOwnerView;

In the function that creates the dialog,

CMyDialog md;
md.m_ptrOwnerView = this;
md.ShowModal();

However, if you're trying to draw into the view in response to the WM_PAINT message received by the dialog, you have a bit of a problem. You need to draw in response to the WM_PAINT received by the view, not that recieved by the dialog. The WM_PAINT messages sent to the dialog by the OS are not related to view. Re-think your architecture.

Re: need advice on drawing code!

coda_x6-Oct-03 1:34

coda_x

6-Oct-03 1:34

erm, okie i a bit confused over this WM_PAINT thing, so what u are saying is that, if i code my draw rect in my dialog's WM_PAINT function and then i point it to my CView, the CView will not be able to show the rect on screen is it? i been trying to find out the best way to show my grpahics on SDI window whenever user input dimensions into my dialog...so i know i have a problem linking this dialog to my view.then the best way is to code all my drawing into the CView WM_PAINT function?

Question about several popular sleep methods.

George24-Oct-03 19:46

George2

4-Oct-03 19:46

Hello, everyone!

I often use the following three popular sleep methods under Linux and Windows platform, they are,

1. sleep
2. usleep
3. nanosleep

But I do not understand what are the special advantages and disadvantages of each sleep methods. Can anyone tell me what are their special advantages and disadvantages? Or attributes? Under what circumstance should I use them?

Thanks in advance,
George

Re: Question about several popular sleep methods.

Blake Coverett4-Oct-03 20:53

Blake Coverett

4-Oct-03 20:53

You haven't "often used" sleep, usleep or nanosleep on the Windows platform, they are all Unix calls. You might have used Sleep (notice the capital). If it is really Linux coding help you want, this is not the best place for it.

--
-Blake (com/bcdev/blake)

Re: Question about several popular sleep methods.

George24-Oct-03 21:27

George2

4-Oct-03 21:27

Thanks, Blake buddy!

It seems that you are familiar with Linux/Unix platform. So can you tell me what is their special advantage or disadvantage?

If this is not the best place to discuss the problem, can you introduce me a best online forum or maillist that can be most helpful to me?

regards,
Geo

Re: Question about several popular sleep methods.

Blake Coverett4-Oct-03 21:53

Blake Coverett

4-Oct-03 21:53

Not really, sorry. I was a Unix bigot for years, but I haven't been one since Linus was in middle school.

--
-Blake (com/bcdev/blake)

Re: Question about several popular sleep methods.

George24-Oct-03 22:00

George2

4-Oct-03 22:00

Thanks all the same, Blake buddy!

Can anyone else help?

regards,
Geo

Re: Question about several popular sleep methods.

Johnny ²6-Oct-03 1:14

Johnny ²

6-Oct-03 1:14

sleep - Second resolution, and implemented using signals (a SIGALRM is used)
usleep - Microsec resolution, implemented using a realtime timer. This has actually been deprecated and you should use 'setitimer'
nanosleep - Nanosecond resolution, implemented using a realtime timer.

Use the one most appropriate - if you are sleeping in whole seconds, then 'sleep' is fine, otherwise you'll need one of the other for more accurate sleeping. Another method of sleeping is to use 'select' with a time specified (in seconds and microseconds), which has the advantage of you also being able to read from sockets etc

Re: Question about several popular sleep methods.

George26-Oct-03 16:39

George2

6-Oct-03 16:39

Thanks, Johnny buddy!

Geo

error

R. Thomas4-Oct-03 18:56

R. Thomas

4-Oct-03 18:56

hi...
can someone please tell me the meaning of this error?
error C2440: 'initializing' : cannot convert from '' to 'class CString'

i get this error when i try to
do
CString temp = m_panotherClass->GetStringData()

my
anotherClass has this definition
CString GetStringData()
{
return data;
}

tks for the help

Have a Super Blessed Day!
-------------------------
For God has not given us a spirit of fear, but of power and of love and of a sound mind.
2 Timothy 1:7
"For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life."
John 3:16
"Therefore you also be ready, for the Son of Man is coming at an hour you do not expet."
Luke 12:40

Re: error

Dominik Reichl4-Oct-03 23:02

Dominik Reichl

4-Oct-03 23:02

Depends on what 'data' is.

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: error

R. Thomas5-Oct-03 0:03

R. Thomas

5-Oct-03 0:03

data is CString

Have a Super Blessed Day!
-------------------------
For God has not given us a spirit of fear, but of power and of love and of a sound mind.
2 Timothy 1:7
"For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life."
John 3:16
"Therefore you also be ready, for the Son of Man is coming at an hour you do not expet."
Luke 12:40

Calculating window size based on bitmap and titlebar/border?

Kayembi4-Oct-03 15:53

Kayembi

4-Oct-03 15:53

Hi,

I have a program that generates a window depending on user settings. The window contains a bitmap that the user selects, and can have various border types (dialog, client edge, no border), and may or may not have a title bar.

The window is supposed to be the size of the bitmap that is selected. However, I have just realised that my window size does not take account of the titlebar or border of the window.

For instance, I calculate my window position and size like this currently:

<br />
BITMAP BMPSize;<br />
HBITMAP SizeCheckBMP;<br />
....<br />
GetObject(SizeCheckBMP,sizeof(BMPSize), &BMPSize);<br />
....<br />
//center window in screen:<br />
xpos = (GetSystemMetrics(SM_CXSCREEN)/2)-(BMPSize.bmWidth/2);<br />
ypos = (GetSystemMetrics(SM_CYSCREEN)/2)-(BMPSize.bmHeight/2);<br />
//calculate dimensions:<br />
width = BMPSize.bmWidth;<br />
height = BMPSize.bmHeight;<br />
....<br />
myWnd = CreateWindowEx(<br />
	WS_EX_TOOLWINDOW,<br />
	"my_win_class",<br />
	WS_DLGFRAME,<br />
	NULL,<br />
	xpos,<br />
	ypos,<br />
	width,<br />
	height,<br />
	NULL,<br />
	NULL,<br />
	hInst<br />
	NULL);<br />

The problem here is, suppose the bitmap is 640x480 pixels in size - the window created by this code will be exactly that size too, which doesn't work if there is a title bar and border, as these will be included in these dimensions. So the bottom of the bitmap will be cut off by the exact number of pixels that the titlebar takes up, or the right and bottom of the bitmap will be cut off by the number of pixels that the dialog frame border takes up. I hope that makes sense.

Could someone please suggest a better way of calculating my window size so that it sizes itself to exactly fit whole of the bitmap, plus the title bar and border?

Many thanks for any help,
KB

Re: Calculating window size based on bitmap and titlebar/border?

Michael Dunn4-Oct-03 16:53

Michael Dunn

4-Oct-03 16:53

Check out AdjustWindowRectEx()

--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
#include "witty-quote.h"

Re: Calculating window size based on bitmap and titlebar/border?

PJ Arends4-Oct-03 16:57

PJ Arends

4-Oct-03 16:57

Hey, I'll have to remember that one! Big Grin | :-D

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Calculating window size based on bitmap and titlebar/border?

Michael Dunn4-Oct-03 17:08

Michael Dunn

4-Oct-03 17:08

Here's some more info[^] on that API from RaymondC's blog[^]

--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
#include "witty-quote.h"

Re: Calculating window size based on bitmap and titlebar/border?

Kayembi5-Oct-03 3:43

Kayembi

5-Oct-03 3:43

Brilliant, thank you! Both suggestions work great, but I've used AdjustWindowRectEx because it requires less code...

Thanks again,
Keith

Re: Calculating window size based on bitmap and titlebar/border?

PJ Arends4-Oct-03 16:55

PJ Arends

4-Oct-03 16:55

Use GetSystemMetrics to get the height and/or width of the various window components, and add them to your dimension calculations.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Calculating window size based on bitmap and titlebar/border?

J. Dunlap4-Oct-03 16:57

J. Dunlap

4-Oct-03 16:57

Actually, Mike's method is better. Wink | ;)

""It is impossible to rightly govern the world without God and the Bible." -- George Washington

FLUID UI Toolkit

Registry code refuses to work for no reason, help!

Steven M Hunt4-Oct-03 14:22

Steven M Hunt

4-Oct-03 14:22

What's wrong with my code? the first queried value works but the second one does not. What's the problem?

char Desktop[500];
char Programs[500];
char CurDirectory[500];

GetCurrentDirectory(1000, CurDirectory);

HKEY hKey;
DWORD dwBufLen1, dwBufLen2;

if (RegOpenKeyEx(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS)
{
RegQueryValueEx(hKey, "Desktop", NULL, NULL, (LPBYTE) Desktop, &dwBufLen1);
RegQueryValueEx(hKey, "Programs", NULL, NULL, (LPBYTE) Programs, &dwBufLen2);//doesn't work!
}
RegCloseKey(hKey);

-- Steve

Re: Registry code refuses to work for no reason, help!

Michael Dunn4-Oct-03 16:56

Michael Dunn

4-Oct-03 16:56

You need to initialize your buffer size variables so RegQueryValueEx() knows how much space you're passing in.

--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
#include "witty-quote.h"

Kazaa searchresult ctrl??

Stefan Dahlin4-Oct-03 14:04

Stefan Dahlin

4-Oct-03 14:04

I wonder if someone knows how i can get the same behaviour in a
CListCtrl or CTreeCtrl or any other control, that the searchresult ctrl
has in Kazaa.

I want a tree ctrl with multicolumn and the possibility to drag and drop
the columns.
And the expandable part, the +/- signs, should always be in the first column.
I almost found this in a ctrl on codeproject, but when the first column
was moved the +/- signs where moved to, not pretty.

It looks to me that Kazaa uses a CListCtrl with tree capabilities, but i'm not sure.
And if it is, how can i get it in my application?

I hope that someone knows what i'm talking about, and can help me.

Network interface

Florin Ochiana4-Oct-03 12:17

Florin Ochiana

4-Oct-03 12:17

Hi,

Usually when the computer is not connected to the net the interface in My Network Places appears Disconnected ("Network cable unplugged"). Is there a way to tweak the registry to bring up the interface without being connected to the net?

The reason I want to do this is because I have on my computer a win xp and linux. I run linux in VMWare. In linux I have a server and on windows the application that has to connect to the server.

Thanks

-----
We are what we repeatedly do. Excellence, then, is not an act, but a habit.

Re: Network interface

Max Santos5-Oct-03 5:12

Max Santos

5-Oct-03 5:12

well, if you dont have another machine you can :

connect the cable to a sheap 10Mbp hub

or

you can insert a second network addapter in you machine and connect the two with a crossover cable

MSN:maxsnts@hotmail.com

PRINTING -VC++

radha vijay4-Oct-03 9:11

radha vijay

4-Oct-03 9:11

Dear All

Could anyone please let me know how to print jpeg/bmp images in vc++?

When i do so, i get the image in the top left corner of the page,very small size.
I use the mm_loenglish mapping mode.

Alternatively can i use cximage for printing?but how do i do?

Would be great if u cud help me..

Thankyou very much.

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