C / C++ / MFC

Re: How detect what memory apply/need the app ?

14-Feb-02 11:19

Wizard_01 wrote:
I have big array (about 1 000 - 100 000 items) . How can I detect what memory the app occupy ??

That depends on the type of array. If it is an array of bytes, a 100,000 size array would be 100,000 bytes. If it is an array of objects or structs, then use sizeof to find the size of that object and multiply by 100,000.

Example :- for an array of type myStruct
tot_mem_reqd_for_array = array_size * sizeof myStruct

Nish

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Atul Dharne14-Feb-02 14:53

Atul Dharne

14-Feb-02 14:53

Wizard_01 wrote:
I have big array (about 1 000 - 100 000 items) . How can I detect what memory the app occupy ??

For getting memory occupied by array you can use the sizeof operator.

int  array[] = { 100, 200, 300 };     // sizeof( array ) is 12 sizeof(int)=4bytes for 32-bit OS
size_t  sizearr = sizeof( array );

Atul

Sonork 100.13714 netdiva

Modifying HTML-source before displaying it in the browser

User 665814-Feb-02 10:29

User 6658

14-Feb-02 10:29

Hi
I hope someone of you is able to solve my problem.

What I want to do is to write a plugin for the InternetExplorer (a so called BHO - Browser Helper Object) that will modify the HTML content before InternetExplorer displays the webpage.

I already wrote a plugin which will catch the DWebBrowserEvents2::DocumentComplete event. This is my code which works so far:

HRESULT __stdcall CCounter::DocumentComplete(IDispatch* pDisp, VARIANT * URL )
{
	ATLTRACE(_T("CCounter::DocumentComplete\n"));
	
        return S_OK;
}

What I now want to do is a bit complicated:
Before the browser is about to display the webpage I want to get access and to the document's content and modify it (e.g. for removing keywords previously defined in an external file)

I hope someone of you can help me, since it is a question which can't be explained in 1 minute.

Thanks in advance

regards
Gregor

modified 12-Sep-18 21:01pm.

Re: Modifying HTML-source before displaying it in the browser

moliate15-Feb-02 0:04

moliate

15-Feb-02 0:04

When the DocumentComplete event is sent, a great deal of rendering is already done. This will not prevent you from modifing the document "on the fly". What I would suggest is the following:

1) QueryInterface pDisp for the IWebBrowser2 interface (or call Invoke directly)

2) Use IWebBrowser2::get_Document to get a pointer to the (Dispinterface of; QueryInterface again) IHTMLDocument2. If the document contains frames you have to find the interface for each frame, and repeat step 3 for each of them.

3) Get the body element and send it to an recursive function that handles each leaf element (gets/puts outer text). It then finds all element children and feed them back to the function.

This is just an suggestion, and perhaps someone has a better solution. Sorry if I don´t go into all technical details, but I hope this will help a little.

/moliate

Re: Modifying HTML-source before displaying it in the browser

15-Feb-02 13:26

As I recall from my prevous experience on close to that issue:
DocumentComplete Event may not be always fired... So, check Refresh for example... I recall it didn't work for me... But again, it could be previous versions of WebBrowser...
Everything else as rightly described in previous message...
GL
Igor

the usage of atol function?

lucy14-Feb-02 9:45

Re: the usage of atol function?

14-Feb-02 9:45

Hi, I tested the atol() function. This line works fine:

char buffer[] = "1234567890.12";
long number = atoi(buffer); // number = 1234567890;

but here is problem after I added the following lines:

buffer[10] = '\37'; // buffer = "1234567890712" now
number = atoi(buffer); // return value is 1912276760. why? Confused | :confused:

thank you very much for your advice! Rose | [Rose]

lucy14-Feb-02 9:46

Re: the usage of atol function?

14-Feb-02 9:46

sorr, typing error:

buffer[10] = '\37'; ==> buffer[10] = '\x37'; Blush | :O

Nish Nishant14-Feb-02 10:25

Re: the usage of atol function?

14-Feb-02 10:25

A long is a 32 bit number.
The biggest it can store is 4294967295
1234567890 < 4294967295
But
1234567890712 > 4294967295

That's why you get this overflow error.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
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lucy14-Feb-02 10:29

HtmlHelp API questions...

14-Feb-02 10:29

Ah, I see. Thank you, Nish. Rose | [Rose]

Maximilien14-Feb-02 9:03

Maximilien

14-Feb-02 9:03

I'm trying to figure out how this beast is supposed to work to be able to show popup contextual help windows?

The tech-writter gave me a help.chm file that has a [TEXT POPUP] section in it with the text file that contains all the contextual help descriptions like :

context.txt :

.topic HID_TOPIC_DO_SOMETHING
This functionnality will do something

and context.h :

#define HID_TOPIC_DO_SOMETHING 4567

in my program I'm doing the following:

 HH_POPUP popupText = { sizeof(HH_POPUP), // cbStruct              
                        theApp->m_hInstance, // hinst
                        4567,// idString
                        NULL,// pszText
                        {100, 100},// pt
                        (DWORD) -1, // default clrForeground;
                        (DWORD) -1, // default clrBackground;
                        {-1, -1, -1, -1}, // default rcMargins;
                        NULL// default pszFont;
                        };

// The call where helpFile is the fully path name of the chm file with the context.txt internal file name of the contextual help
// with the format : (something like ) "c:\\help.chm:/context.txt"

 ::HtmlHelp(m_hWnd,helpFile, HH_DISPLAY_TEXT_POPUP  ,(DWORD) &popupText);

But it doesn't work really well, it doesn't work at all, I don't know exactly what happening, but the topic is not found!

Is this supposed to work ? Should it be used ? the documentation in MSDN is not really usefull, and what I could find on the web, wasn't really usefull either!

If you have any hints, tips or additional resources for this I'd appreciate !

Thanks!
Max.

Re: HtmlHelp API questions...

Tim Smith14-Feb-02 12:22

Tim Smith

14-Feb-02 12:22

Here is the code I use

	// @cmember Display the actual help

	static HWND DoHtmlHelp (HWND hwndCaller, 
		LPCTSTR pszFile, UINT uCommand, DWORD dwData)
	{
#if !defined (_WIN32_WCE)
		//
		// Display a wait cursor
		//

		CWaitCursor wait;

		//
		// Cancel any tracking modes
		//

		if (hwndCaller)
		{
			CWindow wMain;
			wMain .Attach (hwndCaller);
			wMain .SendMessage (WM_CANCELMODE, 0, 0);
			wMain .SendMessageToDescendants (WM_CANCELMODE, 0, 0, TRUE);
		}

		//
		// Attempt to cancel capture
		//

		HWND hWndCapture = ::GetCapture ();
		if (hWndCapture != NULL)
			::SendMessage (hWndCapture, WM_CANCELMODE, 0, 0);

		//
		// Finally, run the Help engine
		//

		return HtmlHelp (hwndCaller, pszFile, uCommand, dwData);
#else
		return NULL;
#endif
	}

	// @cmember Display a popup 

	static HWND DoHtmlHelpPopup (LPTSTR pszHelpFile, HWND hWndCtrl, DWORD dwID)
	{
#if !defined (_WIN32_WCE)
		RECT rect;
		::GetWindowRect (hWndCtrl, &rect);
		HH_POPUP pop;
		pop .cbStruct = sizeof (pop);
		pop .hinst = NULL;
		pop .idString = dwID;
		pop .pszText = NULL;
		pop .pt .x = (rect .left + rect .right) / 2;
		pop .pt .y = (rect .top + rect .bottom) / 2 + 8;
		pop .clrForeground = -1;
		pop .clrBackground = -1;
		pop .rcMargins .left = 20;
		pop .rcMargins .top = 8;
		pop .rcMargins .right = 8;
		pop .rcMargins .bottom = 8;
		pop .pszFont = NULL;
		return DoHtmlHelp (hWndCtrl, pszHelpFile, 
			HH_DISPLAY_TEXT_POPUP, (DWORD) &pop);
#else
		return NULL;
#endif
	}

Tim Smith
Descartes Systems Sciences, Inc.

TRichEdit1 - text encryption?

14-Feb-02 8:02

i am making a text editor and i would like a encrypt button that will change the text in a TRichEdit1 box to some form of encryption. i need a password to be entered on encryption that must be put in again to decrypt the text back to what it was
any code or sources would be greatly appreciated

thanks in advance

Steven Richardson - soveryevil@hotmail.com - you can contact me on MSN messenger at that address or email me on it

Re: TRichEdit1 - text encryption?

Nish Nishant14-Feb-02 11:21

Sending text to CHtmlView

14-Feb-02 11:21

Perhaps you might want to use the PGP API.

Or look up "Cryptographic Functions" on MSDN
If you have trouble finding it, look for CryptEncrypt and CryptDecrypt

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Romeozulu14-Feb-02 7:54

Romeozulu

14-Feb-02 7:54

I have a project that uses the CHtmlView MFC View and I want to feed the control the html text, rather then have it get it from the web or a file. There doesn't seem to be a way to do this.

For example, I just want to display this in the CHtmlView:

<html><body><b>Hello World</b></body></html>

How can this be done?

Re: Sending text to CHtmlView

Nish Nishant14-Feb-02 9:03

14-Feb-02 9:03

http://www.codeproject.com/useritems/parse_html.asp

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Using PRINTER_INFO

Stan the man14-Feb-02 7:39

Stan the man

14-Feb-02 7:39

Hi. I want to thank everyone who has helped me answer many of my questions. However, it seems like the questions just keep coming.

I am tryingto use Openprinter and also GetPrinter to see if a printer is offline/connected or not. However, I am having some trouble with the structure of the call.

PRINTER_INFO_2 Printer2;

GetPrinter(
hPrinter, //printer handle
2, //level 2
Printer2, // Buffer that holds the info
sizeof(PRINTER_INFO_2),
&dwNeed); //bytes still needed

However, it gives me an error about not being able to cast from PRINTER_INFO2 to unisgned char*. I also tried to allocate another buffer and type cast it manually to PRINTER_INFO_2 to try to get to the Status variable but same basic thing.

What is the problem.

Thanks in advance.

Re: Using PRINTER_INFO

Tim Smith14-Feb-02 12:25

Tim Smith

14-Feb-02 12:25

(char *) &Printer2

Tim Smith
Descartes Systems Sciences, Inc.

adding and sorting

14-Feb-02 7:29

can any one tell me how to write a method that adds some objects to an Array.
and at the same time sort these objects using insertion sort?
thanks a lot,

lucy14-Feb-02 9:54

14-Feb-02 9:54

using linked list instead of array might help.

here is some info about linked list: http://cslibrary.stanford.edu/103/LinkedListBasics.pdf

14-Feb-02 10:59

i cannot use anything else but arrays, it's part of my project!
any ideas??
thanks al lot

Nish Nishant14-Feb-02 11:16

14-Feb-02 11:16

anonymous wrote:
it's part of my project

Smile | :)

Recently CP has been attracting a lot of project help requests.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Nish Nishant14-Feb-02 11:15

14-Feb-02 11:15

If insertion sort is what I think it is, you insert an element into a sorted array at the right position so that the resulting array is again sorted. If you start with an array with zero elements, simply insert it at position 1. From now on for each element added, compare with each existing element till you find one that is equal or greater than it in sort order and insert it there.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Derek Waters14-Feb-02 11:15

Derek Waters

14-Feb-02 11:15

Well, if you absolutely have to use arrays, then the basic idea would be:

1) If your array has n items in it:
2) Search the array for the position to insert the new item, call it i
3) Create a new array of size (n+1)
4) Copy items 0..(i-1) from the old array to positions 0..(i-1) in the new array
5) Copy items i..(n-1) from the old array to positions (i+1)..n in the new array
6) Copy the new item into position i in the new array.

As Nish pointed out, this is not a really good way to do it, you should check and see if you can use a linked list, as it will perform much better.

------------------------
Derek Waters
derek@lj-oz.com