Re: OnDestroy function - C / C++ / MFC Discussion Boards

thathvamsi29-Jun-06 18:23

29-Jun-06 18:23

thanks,,

iam jus learning and trying new things...sorry if it would sound simple and silly..

I open this dialog window like this in the mainframe.cpp
void CMainFrame::OnStatusRegs()
{
CStatus_dialog myopen;
myopen.DoModal();
}
void CMainFrame::OnPortRx(WPARAM wBytesRx, LPARAM lEvt)
{
---
---
myopen.PostMessage(WM_PLOT,NULL,NULL);
}

in this way, everytime this OnPortRx is called, the WM_PLOT will be indicated to the status dialog window and the necesary plot function will be executed. am I correct? can i do this way?
Please let me know if iam wrong.

Re: post/send messages

Weiye Chen29-Jun-06 20:20

Weiye Chen

29-Jun-06 20:20

Firstly, your dialog object is created in OnStatusRegs(). Upon exiting this function, your dialog will be destroyed so you can't post message in OnPortRx(). Another thing about your dialog is that you are creating it as modal, which means when your dialog is shown, you can't interact elsewhere in your application, until that dialog is closed. Is that what you want?

Re: post/send messages

thathvamsi29-Jun-06 20:30

thathvamsi

29-Jun-06 20:30

thanks.
My dialog window has to open on clicking a toolbar(STATUSREGS) on formview window.
that is the OnStatusRegs() within which I call the dialog using DoModal();

This is the way I knew. So i did it like this.
But I want the edit controls in my dialog page to be updated with values that are received in the OnPortRx() function.
How do i do it.?

Re: post/send messages

Weiye Chen29-Jun-06 20:38

Weiye Chen

29-Jun-06 20:38

You need to create your dialog as modeless. Here's an example[^] i found. Also, you should create your modeless dialog when your application starts and just show/hide it in OnStatusRegs().

Printing

RockyJames29-Jun-06 14:32

RockyJames

29-Jun-06 14:32

hi,
Basic layout of my application,CView1 is TreeView,FormView is one pane ,Cview2 in other pane...
---------------------------------
-
- Formview1
- Cview1 ---------------------
- Cview2
-
---------------------------------

In CFormView1 i have created tabcontrol,consiting of two tabs,the client area of the CFormView1 "rect" is given as i/p to Create tabcontrol,in each tab i am having a ListControl.The client area of the tab "rect" is given i/p for listcontrol creation,I have handled WM_CONEXTMENU,in Tabcontrol class,i have two item in the contextmenu,one is "print" and other is "preview".i have Handled ON_COMMAND for both,i have overriden,Onpreprinting and OnPrint,in respective onCommand,i have called CFormView::OnFilePrint(); and CFOrmView::OnFilePrintPreview();,When i click the print item in the context menu,it is printing,when i click preview i am getting preview,but when i click print button in the preview,it is not printing,my code is called while preview,Zoom and Zoom,it`s not called only when i click print button in the preview dlg,what could be the reason..

Thanks in Before
James

-- modified at 20:39 Thursday 29th June, 2006

Re: Printing

Hamid_RT29-Jun-06 20:26

Hamid_RT

29-Jun-06 20:26

its previous error(yes),Are you sure that your function(button) is running when you click it.

whitesky

OnDestroy function

Ram Murali29-Jun-06 14:31

Ram Murali

29-Jun-06 14:31

Hi everybod,

I would like to know whether there is any function to check the availability of the destroyed dialog box.

In brief, I have destroyed a window using OnDestroy() for some reason ( doesnt close it, still its in the display). If i check the memory allocation of the window, everytime i get NULL after the OnDestroy function. But the window is still in the dispaly. is there any other method to check the availability of the window after OnDestroy Function?

Thanks in advance.

Regards,
Ram

Re: OnDestroy function

PJ Arends29-Jun-06 17:38

PJ Arends

29-Jun-06 17:38

You are not actually calling OnDestroy() yourself are you? OnDestroy() is a message handler that is called by the system when the window recieves a WM_DESTROY message. Call DestroyWindow() instead.

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good, use it!!!

How to add common dialog to my dialog [modified]

huynhnb29-Jun-06 13:36

huynhnb

29-Jun-06 13:36

Re: How to add common dialog to my dialog

_AnsHUMAN_ 29-Jun-06 19:53

_AnsHUMAN_

29-Jun-06 19:53

What I get from your question is that you want to show one dialog twice on another dialog.
Am I right?
Do this way
Declare CMyDialog dlg1,dlg2 in the header file of your class where you are calling the dialog.

//First Dialog
dlg1.Create (IDD_TEST_DIALOG1,this);
dlg1.SetWindowPos(NULL,0,0,100,100,SW_SHOWNORMAL );
dlg1.ShowWindow (SW_SHOW);
// Second Dialog
dlg2.Create (IDD_TEST_DIALOG1,this);
dlg2.SetWindowPos(NULL,100,100,100,100,SW_SHOWNORMAL );
dlg2.ShowWindow (SW_SHOW);

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: How to add common dialog to my dialog

Hamid_RT29-Jun-06 20:13

Hamid_RT

29-Jun-06 20:13

<br />
CYourClass m_yourclass;<br />
m_yourclass.Create(IDD_YOURCLASS,0)<br />
m_yourclass.ShowWindow(1);<br />
and ...<br />

whitesky

Saving to file in human readable form

elixxo2929-Jun-06 13:34

elixxo29

29-Jun-06 13:34

I ran into a problem after implementing a simple algorithm that checks for the longest common sequence in a string of characters. After implementation, I tested the algorithm and everything worked fine, but since I needed to use the output as input in other programs I decided to save the output to a text file. But I was suprised that the output was saved in a format that is not human readable.

Could anybody please tell me what I need to do to get the output saved just as it appears on the screen(human readable form).

By the way I used MS CString class in the implementation.

The screen output is:

UPWARDS UPWARDS UPWARDS DIAGONALWARDS LEFTWARDS DIAGONALWARDS
DIAGONALWARDS LEFTWARDS LEFTWARDS UPWARDS DIAGONALWARDS LEFTWARDS
UPWARDS UPWARDS DIAGONALWARDS LEFTWARDS UPWARDS UPWARDS
DIAGONALWARDS UPWARDS UPWARDS UPWARDS DIAGONALWARDS LEFTWARDS
UPWARDS DIAGONALWARDS UPWARDS UPWARDS UPWARDS UPWARDS
UPWARDS UPWARDS UPWARDS DIAGONALWARDS UPWARDS DIAGONALWARDS
DIAGONALWARDS UPWARDS UPWARDS UPWARDS DIAGONALWARDS UPWARDS

This is the same output saved to file.

00422E2C 00422DEC 00422DAC 00422D6C 00422D2C 00422CEC 00422CAC 00422FEC
004215EC 004215EC 004215EC 0042175C 004217AC 0042175C 00422FAC 0042175C
004217AC 004217AC 004215EC 0042175C 004217AC 00422F6C 004215EC 004215EC
0042175C 004217AC 004215EC 004215EC 00422F2C 0042175C 004215EC 004215EC
004215EC 0042175C 004217AC 00422EEC 004215EC 0042175C 004215EC 004215EC
004215EC 004215EC 00422EAC 004215EC 004215EC 004215EC 0042175C 004215EC
0042175C 00422E6C 0042175C 004215EC 004215EC 004215EC 0042175C 004215EC

Any help will be greatly appreciated

Re: Saving to file in human readable form

Michael Dunn29-Jun-06 15:44

Michael Dunn

29-Jun-06 15:44

Your file writing code is writing pointer values - probably the values of the LPCTSTR pointers kept inside the CStrings. You need to write the characters themselves.

--Mike--
Visual C++ MVP Cool | :cool:

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NetWkstaGetInfo() Question

RobJones29-Jun-06 13:23

RobJones

29-Jun-06 13:23

Hello,
I am using the following to pull the domain/workgroup name of a remote computer. This works just fine when I use the remote computers IP address but if I use the machine name it fails with an access is denied error. Has anyone experienced the same problem or does anyone have any ideas why this is happening?

DWORD dwLevel = 100;
LPWKSTA_INFO_100 pBuf = NULL;
NET_API_STATUS nStatus;

nStatus = NetWkstaGetInfo(L"\\\\192.168.1.2", dwLevel, (LPBYTE *)&pBuf);

if (nStatus == NERR_Success)
{
    TRACE(L"Name:\t\t%s\n",     pBuf->wki100_computername);
    TRACE("Platform:\t%d\n",    pBuf->wki100_platform_id);
    TRACE(L"Domain:\t\t%s\n",   pBuf->wki100_langroup);
}
else
{
    char error[1024];
    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, nStatus, NULL, error, sizeof(error), NULL);
    TRACE("Error: %s", error);
}

// Free the allocated memory.
if (pBuf != NULL)
    NetApiBufferFree(pBuf);

Thanks,
Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Re: NetWkstaGetInfo() Question

David Crow30-Jun-06 2:26

David Crow

30-Jun-06 2:26

RobJones wrote:
...but if I use the machine name it fails with an access is denied error.

Your code snippet works fine for me using either an IP address or a machine name. How are you specifying the machine name?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: NetWkstaGetInfo() Question

RobJones30-Jun-06 3:29

RobJones

30-Jun-06 3:29

I specify it like.... L"\\\\machine". I'm going to test it at work today on a few other machines. Just thought it was weird that simply switching between IP and machine name would cause that error.

Whoever said nothing's impossible never tried slamming a revolving door!

Re: NetWkstaGetInfo() Question

David Crow30-Jun-06 3:45

David Crow

30-Jun-06 3:45

Makes me wonder if it's a name-resolution issue. Do you have a problem using gethostbyname()? In other words, can you use this function to resolve a host name to its IP address?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

CListCtrl Notify msg

ftsOne29-Jun-06 11:53

ftsOne

29-Jun-06 11:53

Hi All,

I need to cath notify messages from a slider control and I can't seem anything specific to slider controls.

i.e. When the user slides the thumb, I'd like to make adjustments to other parts of the program. Such as changing text color.

Can anyone help?

Ferdinand

Re: CListCtrl Notify msg

Michael Dunn29-Jun-06 15:47

Michael Dunn

29-Jun-06 15:47

Sliders send scroll messages - WM_HSCROLL or WM_VSCROLL depending on the slider's orientation.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

file manipulation with fopen(), fscanf()

kitty529-Jun-06 10:06

kitty5

29-Jun-06 10:06

Hi everyone! Big Grin | :-D

Here I go again...;)
I'm writing a simple win32 console program.
so, I'm trying to open a text file that has the following in it:
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07

What I want to do is open the file then get the data and stick it into an array of CString or whatever. i.e. data[0] = 0x0, data[1] = 0x1, etc.
Here is my code:

<br />
#include "stdafx.h"<br />
<br />
int _tmain(int argc, _TCHAR* argv[])<br />
{<br />
	char *data[200];<br />
	FILE *fpread;<br />
	int i = 0;<br />
	<br />
	if ( (fpread = fopen("data.txt", "r")) == NULL )<br />
	{<br />
		printf("Cannot open file for reading. \n");<br />
		return -1;<br />
	}<br />
<br />
        //initialize data<br />
	for ( int a = 0; a < 200; a++ )<br />
	{<br />
		data[a] = "q";<br />
	}<br />
<br />
	while( (feof(fpread) == 0 || ferror(fpread) == 0) )<br />
	{<br />
		fscanf(fpread, "%s", &data[i]); <- problem is here... i think<br />
		printf( "data = %s \n", data[i]);<br />
		i++;<br />
	}<br />
<br />
	if (feof(fpread) != 0)<br />
	{<br />
		printf("EOF\n");<br />
	}<br />
	else if (ferror(fpread) != 0)<br />
	{<br />
		printf("error!\n");<br />
	}<br />
<br />
	return 0;<br />
}<br />

When I run my code I get:
Unhandled exception at 0x0059f89f in testFileOpen.exe: 0xC0000005: Access violation reading location 0x30307830.

then it opens up the file: output.h and says that it has a problem with line 1646.

please explain.... Confused | :confused:

Kitty5

Re: file manipulation with fopen(), fscanf()

David Crow29-Jun-06 10:16

David Crow

29-Jun-06 10:16

kitty5 wrote:
data[a] = "q";

You must allocate memory for data[a] before you can assign anything to it. Consider:

for (int a = 0; a < 200; a++)
{
    data[a] = new char[5]; // room for 0x## plus a terminating \0 character
    
    data[a][0] = 'q';
    data[a][1] = '\0';
    // or
    strcpy(data[a], "q");
}

Now the fscanf() statement, sans the &, should be fine (although initialization is not necessary).

kitty5 wrote:
while( (feof(fpread) == 0 || ferror(fpread) == 0) )

Use && instead.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: file manipulation with fopen(), fscanf()

kitty529-Jun-06 10:25

kitty5

29-Jun-06 10:25

<br />
<blockquote class="FQ"><div class="FQA">DavidCrow wrote:</div>You must allocate memory for data[a] before you can assign anything to it. Consider:<br />
<br />
<br />
for (int a = 0; a < 200; a++)<br />
{    <br />
data[a] = new char[5]; <br />
// room for 0x## plus a terminating \0 character        <br />
data[a][0] = 'q';    <br />
data[a][1] = '\0';    <br />
// or    <br />
strcpy(data[a], "q");<br />
}</blockquote><br />
<br />

I've also added the above code. However, I'm still getting the same error.

Kitty5

Re: file manipulation with fopen(), fscanf()

David Crow29-Jun-06 11:32

David Crow

29-Jun-06 11:32

kitty5 wrote:
I've also added the above code. However, I'm still getting the same error.

But did you change the fscanf() statement, too?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: file manipulation with fopen(), fscanf()

kitty529-Jun-06 11:37

kitty5

29-Jun-06 11:37

yes

Kitty5

Re: file manipulation with fopen(), fscanf()

David Crow30-Jun-06 2:14

David Crow

30-Jun-06 2:14

Strange. It worked fine for me with only those two changes.

void main( void )
{
    char *data[200];
    FILE *pFile;
    int i = 0;
 
    pFile = fopen("c:\\data.txt", "r");
    if (pFile != NULL )
    {
        for (int a = 0; a < 200; a++ )
            data[a] = new char[5];
 
        while ((feof(pFile) == 0 && ferror(pFile) == 0))
        {
            fscanf(pFile, "%s", data[i]);
            printf("data = %s \n", data[i]);
            i++;
        }
 
        fclose(pFile);
    }
}

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

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