C++ Function template help - C / C++ / MFC Discussion Boards

Re: It is possible ?

Member 16246231-May-04 0:06

Member 162462

31-May-04 0:06

Thanks for u'r immediate response with plenty of information

~Rahuraman.K

Creating custom tooltips

vikashparida30-May-04 20:24

vikashparida

30-May-04 20:24

How can i display my own tooltips using VC. I am talking about the ones such as function declarations that VC displays in the IDE.

Any help will be appreciated

Vikash Parida

Re: Creating custom tooltips

*test*30-May-04 21:59

*test*

30-May-04 21:59

Sorry, I haven't my source code on this computer at the moment Frown | :-(

But you can create Tooltips with the "CreateWindowEx" function, then you
need to specify something like WC_TOOLTIP or perhaps "TOOLTIP32" as window class -- take a look at the Win32.hlp - it is being described there

query reg patches

Member 115017630-May-04 19:37

Member 1150176

30-May-04 19:37

Hi,

It would be great if somebody can help me with this doubt.

My main target is :In order to list the patches and their dependancies on the target machine(for ex:my machine):
Should I have to go through the path -

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
or
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\

When I went through this path.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
I am able to get a list of hot fixes .
What are hot fixes and are these patched?

When I went through this path.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\
I am able to see 3 entries-
Data Access
Windows 2000
Windows MEDIA pLAYER
And under Windows 2000 -I am seeing 2 entries SP4 and SP5.

Is SP4 is the list of service packs?
Is SP5 is the list of updates?
SP5 has a folder called FileList.

This folder when I click shows some dlls on the right pane.
Are these dependancies?I mean dependancies which these patches depend?

Pls guide.

Query reg patches

ykutanoor30-May-04 19:35

ykutanoor

30-May-04 19:35

why view2 can printpreview and view1 can not?

fffly30-May-04 18:11

fffly

30-May-04 18:11

they are created by the same way
pDocTemplate = new CMultiDocTemplate(
IDR_CREATETYPE,
RUNTIME_CLASS(CCreateViewWithPrintDoc),
RUNTIME_CLASS(CChildFrame), // custom MDI child frame
RUNTIME_CLASS(CCreateViewWithPrintView));
AddDocTemplate(pDocTemplate);
pTxtTemplate = new CMultiDocTemplate(
IDR_CREATETYPE,
RUNTIME_CLASS(CCreateViewWithPrintDoc),
RUNTIME_CLASS(CChildFrame), // custom MDI child frame
RUNTIME_CLASS(CTxtView));
AddDocTemplate(pTxtTemplate);

please see my code!
http://mail.sina.com.cn/cgi-bin/attachment.cgi/oookkkk/application/x-msdownload/1085976835.13075.mail.sina.com.cn:2,S.a00.dat/createviewwithprint.rar

if you can correct it.please mail me:oookkkk@sina.com

bary thank you!

GUI: Title bar

TrungHuynh30-May-04 17:29

TrungHuynh

30-May-04 17:29

Hello every body

After i read an article about "A Technique to Customize the Title Bar of Windows" By Junlei Li
on code project (WTL).
I decide to write in to MFC DLL, a set of classes: Button, Edit..., and Customize the title bar.

But i have got a problem with title bar: Firt i remove the title bar of the parent, and then I
create a window to replace it (WS_VISIBLE | WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN).
It works Ok on Frame (the window is mainframe or child frame), but on Dialog, the Substitute title
is not correct, it doesn't appear the same place as the Original title that i had removed.
I'm sure that the x,y position is absolutely right ( because it work ok on Frame). I consider that the WS_POPUP is the main resaon cause the problem (is it true)

Any one could help me ?, After i finish this dll, i will post on codeproject (I promise)

Thanks alot

TrungHuynh.

C++ Function template help

Indrawati30-May-04 17:16

Indrawati

30-May-04 17:16

Hi I have created a template function as follows:

template <typename T> perform(int iTotal)
{
vector<T> vec;
for(int i = 0; i < iTotal; i++)
{
vec.push_back(T());
}
}

and I call the function in main() using the following:

perform<double>(1000);

The program compiles and links without any error, but when I run it, I always get the message: Instruction at "0x...." referenced memory at "0x...". The memory could not be written!

Could someone tell me what I did wrong, and how I can rectify it?

BTW, if I changed the function definition to

template <typename T> perform(int iTotal, T NoUse);

where NoUse is not used at all in the function, the program runs perfectly. My only gripe is that the solution does not seem elegant.

Thanks!

Re: C++ Function template help

Andrew Walker30-May-04 20:12

Andrew Walker

30-May-04 20:12

Not sure if this will help, however try supplying a return value to prevent the compiler from defaulting it to int. This behaviour was only supported in older compilers (I'm assuming you're using VC6)

template <typename T> 
void perform(int iTotal)
{
    vector<T> vec;
    for(int i = 0; i < iTotal; i++)
    {
        vec.push_back(T());
    }
}

Make sure the constructor for T isn't doing anything it shouldn't - this won't be a problem if you're using double's however.

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

Re: C++ Function template help

Indrawati30-May-04 20:18

Indrawati

30-May-04 20:18

Hi Thanks for the reply. I've tried supplying the void return value, but I still get the same error.

Re: C++ Function template help

Paul Ranson31-May-04 13:09

Paul Ranson

31-May-04 13:09

Do you have a complete compilable example to post?

Your function as it exists is obviously pointless, and even if it weren't is equivalent to calling resize on the vector, which seems rather more direct.

Paul

Re: C++ Function template help

Indrawati31-May-04 16:04

Indrawati

31-May-04 16:04

Hi My intention was to analyze the performance of STL vector insertion, how long does it take to insert e.g. 10 million doubles, ints, strings, etc., hence the code.

Re: C++ Function template help

Paul Ranson1-Jun-04 6:10

Paul Ranson

1-Jun-04 6:10

I think your GPF is a consequence of the compiler rather than the code.

But I don't think you're going to learn anything interesting about vector per se from this type of test. The dominant factor will be allocation and reallocation. Any real usage where you know how big you want the vector would call reserve first. And if you want to get to very large arrays of ordinary types then reverting to new/delete and manual management of length is probably going to be notably more efficient.

Paul

CWebBrowser OnResizeTo event?

surfordie30-May-04 17:14

surfordie

30-May-04 17:14

Is it possible to handle the javascript resizeTo() and moveTo() events in a custom CWebBrowser2 control? I can not seem to catch this event. Any ideas?

Re: CWebBrowser OnResizeTo event?

Anthony_Yio31-May-04 1:17

Anthony_Yio

31-May-04 1:17

Try this, but this is not CWebBrowser2 control. It is a custom view.

http://www.codeproject.com/dotnet/dhtmlview.asp

Sonork 100.41263:Anthony_Yio

CFile::Open Timeout's??

shultas30-May-04 15:23

shultas

30-May-04 15:23

Hey all.

I'm using CFile to access some files across a network share. It works great when the servers are all online, however if one of the servers goes offline, the CFile::Open will try to open the file across it for 30-60 seconds (which is too long for this app that I'm building).

I am wondering if there is a way to set a default open timeout .... so it will try for say, 5 seconds, and if it can't get it, it fails and returns false?

TIA!!

Re: CFile::Open Timeout's??

Anthony_Yio31-May-04 0:40

Anthony_Yio

31-May-04 0:40

How about to use

_taccess(const char *path, int mode );

in io.h?

Sonork 100.41263:Anthony_Yio

Access key

JR Shih30-May-04 14:47

JR Shih

30-May-04 14:47

Hi,
I assign a access key to a control, ex. &access.
But besides Alt-A and A, Ctrl-A ,Shift-A, and 1+A, ... all recive WM_COMMAND. Is this by default ? and how do I disable them?

Re: Access key

Anthony_Yio31-May-04 0:51

Anthony_Yio

31-May-04 0:51

(From MSDN)

The WM_COMMAND message is sent when the user selects a command item from a menu, when a control sends a notification message to its parent window, or when an accelerator keystroke is translated.

Accelerator keystrokes that select items from the window menu are translated into WM_SYSCOMMAND messages.

You can assign you own accelerator keystroke to other keys like Ctrl A to correspond to your needed menu?

Sonork 100.41263:Anthony_Yio

Re: Access key

JR Shih31-May-04 2:25

JR Shih

31-May-04 2:25

Thanks, but I need to disable ctrl- and shift- instead of enable them. All articles I searched about access key in MSDN, don't mention that ctrl- and shift- are access keys, so I doubt that ctrl- and shift- are by default.

sending messages to the main window

kfaday30-May-04 14:32

kfaday

30-May-04 14:32

Hello!
I've got this thread function and in the postmessage line i'd like to send a message to the main view of the program. (it's an MFC project).

<br />
DWORD WINAPI CHilos::ThreadProc(LPVOID objeto)<br />
{<br />
	CHilos* thread=(CHilos*)objeto;<br />
	while (thread->Alive)<br />
	{<br />
		while((thread->Alive)&&(thread->Active))<br />
		{<br />
			thread->Work();<br />
		}<br />
	}<br />
	::PostMessage(HWND_BROADCAST, WM_ONFINISH, 0, 0);<br />
	return true;<br />
}

The project is called hiloss, and in hilossView.cpp i declared in the message map:

ON_MESSAGE(WM_ONFINISH, OnThreadended)

and then in the same file there's the definition of the OnThreadended function.

The problem is with the postmessage is that the message never reaches the top window, actually when i debug the project, it never gets into the OnThreadended function.

Is HWND_BROADCAST ok? i think there's the problem. I want to send a message to the ChilossView class, which is the main window of the project, but i don't know how.

thanks!!

Re: sending messages to the main window

Ryan Binns30-May-04 18:07

Ryan Binns

30-May-04 18:07

HWND_BROADCAST won't send the message to your view. It sends the message to all the top-level windows in the system. In MFC, this is the instance of your CMainFrame class. You'll either have to the send the message to your view directly, or handle the message in CMainFrame.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: sending messages to the main window

kfaday31-May-04 2:49

kfaday

31-May-04 2:49

how could i send the message directly to the view?
thanks

Re: sending messages to the main window

Anthony_Yio31-May-04 0:59

Anthony_Yio

31-May-04 0:59

When is OnThreadended been called? in WM_ONFINISH?

And the OnThreadended will call the ThreadProc which will post WM_ONFINISH?

Seems like an deadlock for me.

Sonork 100.41263:Anthony_Yio

Re: sending messages to the main window

kfaday31-May-04 2:50

kfaday

31-May-04 2:50

Anthony_Yio wrote:
When is OnThreadended been called? in WM_ONFINISH?

yes.

Anthony_Yio wrote:
And the OnThreadended will call the ThreadProc which will post WM_ONFINISH?

no, OnThreadended does other things

thanks for answering!

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