C / C++ / MFC

How to get CPU temperature.

6-Oct-07 7:38

This old article still applies...

TN035: Using Multiple Resource Files and Header Files with Visual C++[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Max++5-Oct-07 16:59

Max++

5-Oct-07 16:59

Anybody know how to get CPU temperature from the system.
what the function can support this issue.

Thanks

Re: How to get CPU temperature.

aquawicket5-Oct-07 17:03

aquawicket

5-Oct-07 17:03

not all machines can support reading of the cpu temperature, it's a function of your BIOS software. Sometimes the bios manufacturer will supply dll's that you can reference to call the required function and return the details.

Re: How to get CPU temperature.

Hamid_RT5-Oct-07 18:51

Hamid_RT

5-Oct-07 18:51

See Win32_TemperatureProbe.

Resizing a dynamic pointer array

aquawicket5-Oct-07 16:56

aquawicket

5-Oct-07 16:56

I am using a dynamic array that I often need to resize. I've tried a few way to resize it and so far this is what works. But their MUST be a better way.
Ideas?

int *n = NULL; // Pointer to int, initialize to nothing.
n = new int[2]; // allocate needed room

/////////////////////////////////////

/// Time to make more room!!
int *temp = NULL; //Create a temp Frown | :(

temp = new temp[4]; //allocate
for(register int i=0; i<4; i++){ //transfer data to temp
temp[i] = n[i];
}
delete n; //delete old

n = new int[4]; //make new one
for(register int i=0; i<4; i++){ //transfer the data back
n[i] = temp[i];
}
delete temp; //delete temp

Karismatic5-Oct-07 19:43

Karismatic

5-Oct-07 19:43

why don't you use vector<int> in this case you need not to worry about resizing it grows automatically

int the above question when you delete temp
write delete[] temp as it is an array the above code leads to memory leakage

Regards,
Pankaj Sachdeva

"There is no future lies in any job"
"but"
"future lies in the person who holds the job"

John R. Shaw6-Oct-07 1:42

John R. Shaw

6-Oct-07 1:42

I can barely begin to tell you what is wrong with that.

1) Use ‘vector’ and all your problems will go away.
2) If you must provided your own (do not double copy the data):
2.1) Allocate the new amount of space required.
2.2) Copy the old data to the new data space.
2.3) Free the old space.
2.4) Assign the pointer to the new space.

In C you would have another option (realloc) that if it failed, you would have to resort to (2) above, but I do not know a way to do that in C++.

P.S. delete[] n;

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

aquawicket6-Oct-07 8:05

aquawicket

6-Oct-07 8:05

I think I will use vector. But just to check, here is my own way revised.

number *n - NULL; //create
n = new number[2]; //allocate

////We need more room
number *temp = NULL; //create temp
temp = new number[4]; //allocate
for(register int i=0; i<4; i++){ //transfer old into temp
temp[i] = n[i];
}

delete[] n; //delete old
n = temp; // point to new data

How do you get the ScrollBar Width

John R. Shaw6-Oct-07 12:46

John R. Shaw

6-Oct-07 12:46

Yes, that is the idea; short and simple. The only thing I would change in the example is the assignment to NULL, because you immediately assign a value to it after the declaration.

number* n = new number[2]; // declare and assign in one shot<br />
number* temp = new number[4];

Those are shorter and make more since to me.

P.S. The register keyword is unneeded, because most modern compilers are better at picking register variables than we are and it is free to ignore the suggestion, which is all that keyword is.

Good Luck!

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

littleGreenDude5-Oct-07 10:12

littleGreenDude

5-Oct-07 10:12

How do you get the width of a scrollbar assocaiated to a given control?

Re: How do you get the ScrollBar Width

Mark Salsbery5-Oct-07 12:16

what is ENSURE_THROW? [modified]

5-Oct-07 12:16

It depends on the type of scrollbar.

If it's a standard scrollbar, you can use GetSystemMetrics().

If it's a scrollbar control, you can use GetWindowRect().

For scrollbars implemented by custom controls, you're on your own Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

DreamMengJian5-Oct-07 6:25

DreamMengJian

5-Oct-07 6:25

in MFC afx.h Ln366,I see this:

#define ENSURE_THROW(cond, exception) \
do { int __afx_condVal=!!(cond); ASSERT(__afx_condVal); if(!(__afx_condVal)){exception;} } while (false)

why do{...}while(false)?
is that equal to this:

#define ENSURE_THROW(cond, exception) \
int __afx_condVal=!!(cond); ASSERT(__afx_condVal); if(!(__afx_condVal)){exception;}

and why use "int __afx_condVal=!!(cond);",is this ensure the value of __afx_condVal is either 1 or 0?

Stay Hungry. Stay Foolish

Thanks Alot!
-- modified at 14:06 Friday 5th October, 2007

ShowWindow Command Problems

Beaon5-Oct-07 6:02

5-Oct-07 6:02

Howdy guys, just a quick question about a small problem I am having in a little chat application I made for the sake of learning.

Currently I want my app to minimize to my tray displaying its icon. I want the window to be hidden completly, I dont want it to appear minimized in the taskbar. If the user wants to open the app he can double click the icon in the tray. I got the animation working, my icon loads in the try, however I cannot hide the window. It minimizes to the task bar below making it appear "miniized". It should be hidden no?

Currently I am using this command I assumed it would hide everything. Any obvious thoughts come to mind on what I might be doing wrong?
ShowWindow(m_hWnd, SW_HIDE);

If you want I can display more code just let me know!

Thanks Alot!

Cliff

IMNOOPR5-Oct-07 6:22

IMNOOPR

5-Oct-07 6:22

See http://www.codeproject.com/dialog/hidetaskbar.asp

IMNOOPR

Beaon5-Oct-07 7:14

5-Oct-07 7:14

OK going to look into this more. Seems like alot of work just to hide the window out of the taskbar.

Mark Salsbery5-Oct-07 7:48

5-Oct-07 7:48

Are you sure you're passing the right HWND to ShowWindow()?

What's style and extended styles does the app's main window have?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Beaon5-Oct-07 8:06

5-Oct-07 8:06

Yea I have m_hWnd as my main window. I'm passing these styles apon its creation.

WS_OVERLAPPEDWINDOW|WS_VISIBLE
This gets passed into a win32 wrapper class constructor and is saved to m_dwStyles;

Here is my extended style

WS_EX_CLIENTEDGE

m_hWnd = CreateWindowEx (WS_EX_CLIENTEDGE,<br />
                         m_pClassName, m_pWindowTitle,<br />
                         m_dwStyles,<br />
                         m_pRect->left,<br />
                         m_pRect->top,<br />
                         m_pRect->right-m_pRect->left,<br />
                         m_pRect->bottom-m_pRect->top,<br />
                         NULL, <br />
                         m_hMenu,<br />
                         m_hInstance, <br />
                         (void *)this);

Mark you always seem to save me! Hope you have some ideas for this one. Thank you sir. =)

Cliff

Mark Salsbery5-Oct-07 8:11

5-Oct-07 8:11

hmm... I use the same style and, like DavidCrow (except in a different order),
I just do

Shell_NotifyIcon(...)
ShowWindow(SW_HIDE)

Any other window stuff going on?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Beaon5-Oct-07 8:31

5-Oct-07 8:31

Just minimizing to the tray, some tooltips, buttons. All standard stuff really. I've been following the stromcode tutorial but pulling what I want in my app as apposed to his portscanner.

I had wanted to have the client drop to the tray and post a balloon when someone messags you. My tray icon works but the apps tays in the taskbar as minimized.

Could it be my animation?

Heres everything I have in the minimize function

void ChatApp::miniMizeTray(const int icon)<br />
{<br />
	//We are checking to see if the user<br />
	//has turned off animations<br />
	ANIMATIONINFO anii;<br />
	anii.cbSize = sizeof(anii);<br />
	SystemParametersInfo(SPI_GETANIMATION, sizeof(anii), &anii, 0);<br />
<br />
	RECT desktopRect, thisWindowRect;<br />
	GetTrayWndRect(&desktopRect);<br />
	GetWindowRect(m_hWnd, &thisWindowRect);<br />
<br />
	if (anii.iMinAnimate)<br />
	{<br />
		//Animate Command<br />
		DrawAnimatedRects(m_hWnd, IDANI_CAPTION, &thisWindowRect, &desktopRect);<br />
	}<br />
<br />
	//Hide the Window completly<br />
	ShowWindow(m_hWnd, SW_HIDE);<br />
<br />
	//Show the notification icon<br />
	NOTIFYICONDATA nid;<br />
	ZeroMemory(&nid, sizeof(nid));<br />
	nid.cbSize				= sizeof(nid);<br />
	nid.hWnd				= m_hWnd;<br />
	nid.uID					= 0;<br />
	nid.uFlags				= NIF_ICON | NIF_MESSAGE | NIF_TIP | NIF_INFO;<br />
	nid.uCallbackMessage	= WM_USER;<br />
	nid.hIcon				= LoadIcon(m_hInstance, MAKEINTRESOURCE(icon));<br />
	nid.uTimeout			= 1000;<br />
	nid.dwInfoFlags			= NIIF_INFO;<br />
	lstrcpy(nid.szTip, "Double-Click To Maximize.");<br />
	lstrcpy(nid.szInfo, "ChatApp has been minimized to the system tray.\nClick this icon to restore the application.");<br />
	lstrcpy(nid.szInfoTitle, "Chat App");<br />
<br />
	Shell_NotifyIcon(NIM_ADD, &nid);<br />
}

If I dont get back to you today I will definately on Monday. I'm going to make another run through the code and see if I find anything. Ill come back in the afternoon to see if you guys have any ideas. Thanks for the help!

Cliff

Mark Salsbery5-Oct-07 9:50

5-Oct-07 9:50

Just for the heck of it, maybe try Shell_NotifyIcon() without the
NIF_INFO flag. Same result?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Beaon5-Oct-07 10:57

5-Oct-07 10:57

No, same thing unfortunately. Maybe I can come up with something this weekend. Ill take a peak. Quiet an odd one, I know I am missing something somewhere.

Thanks again!

cliff

David Crow6-Oct-07 3:35

David Crow

6-Oct-07 3:35

I would suggest creating a test application that does nothing but minimize itself to the icon notification area.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Beaon7-Oct-07 8:36

Re: ShowWindow Command Problems [modified]

7-Oct-07 8:36

Thats a great idea. Gunna go do it now. I'll just make a simple window with a edit box inside. We will see how it goes... I'll post tommarow!

Thanks David.

Cliff

Beaon8-Oct-07 3:31

8-Oct-07 3:31

Ok guys I solved the problem in my WinProc Func.

Here is what I have.

case WM_SYSCOMMAND:<br />
		switch (wParam)	<br />
		{<br />
		case SC_MINIMIZE:<br />
			if (!m_bInTray)<br />
			{<br />
				miniMizeTray(IDI_ICON1);<br />
				m_bInTray = true;<br />
			}<br />
                        break;<br />
		}<br />
		DefWindowProc(m_hWnd, uMsg, wParam, lParam);<br />
		if (m_bInTray == true)<br />
		{<br />
			ShowWindow(m_hWnd, SW_HIDE);<br />
		}<br />
		break;

Originally I did not have the ShowWindow command here, for kicks I added it before the DefWindowProc command, then I added it after. As soon as I added it after it worked correctly. Now due to the way I have my app setup, I am using a bool to let the app know whether or not it's in the tray, I had to setup a simple if statement for the same reason.

Any ideas on why I have to place this after the DefWindowProc command?

Cliff

-- modified at 9:43 Monday 8th October, 2007
Just to add, I figured it out making another smaller app with nothing in it accept an edit window and the same minimize functions. Thanks for that advise David! =)

Cliff