Moving Image - C / C++ / MFC Discussion Boards

Re: how to make a "global" object in mfc dialog based application?

Alexandru Savescu28-Jun-02 4:08

28-Jun-02 4:08

I do not like to declare global variables. Instead you may declare it in your CWinApp-derived class and access it like this:

((CMyApp*)AfxGetApp())->m_MyGlobalVariable

Best regards,
Alexandru Savescu

Data Conversion

Firebird27-Jun-02 22:35

Firebird

27-Jun-02 22:35

Does anyone know how to convert a char* to a _variant_t ??

Matt Smith

Re: Data Conversion

27-Jun-02 23:04

That's easy:

v = s;

where v is a _variant_t and s a char*.

Sofus Mortensen

Comet - open source, grunge free COM c++ library
http://www.lambdasoft.dk/comet

Re: Data Conversion

Hans Ruck27-Jun-02 23:07

Hans Ruck

27-Jun-02 23:07

I've tested this and works ok:

_variant_t v;
char *sz;

sz=new char[10];
strcpy(sz, "aaa");

v=sz;
AfxMessageBox((_bstr_t)v);
delete [] sz;

rechi

help please i can`t invalidate MFC views from dll thread

Alexey Kourakolov27-Jun-02 22:19

Alexey Kourakolov

27-Jun-02 22:19

exported function (inside dll):
getcomponent()
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
m_hInThread = AfxBeginThread((AFX_THREADPROC )KIDeviceServiceThreadIn,(PVOID)(CDriver*)this);
}

DWORD WINAPI KIDeviceServiceThreadIn(PVOID pMain)
{
...
pthis->pDocument->UpdateAllViews(); Error use view (when afxMapHWND()==NULL ????;) view - no valid???? but pointer is valid
...
}

Re: help please i can`t invalidate MFC views from dll thread

Prem Kumar28-Jun-02 2:43

Prem Kumar

28-Jun-02 2:43

Generally you cannot manipulate the windows from another thread,
this is some thing to do with message pumps.

Try posting a User defined message to the concerned thread and
then Invalidate the Window in that thread from the Message Handler.

Any Menu designer & Screen designer sample ?

27-Jun-02 21:50

I'm looking for a menu designer and screen designer sample.
Menu designer is just like Visual Studio's one. It lets user to design menu graphically.
Screen designer, just a view that i can move the objects. Any samples i can find, coz I don't know much about GDI.

Moving Image

Shibu.V.Nair27-Jun-02 21:36

Shibu.V.Nair

27-Jun-02 21:36

Hi all,
I'm working with a Dialog based application.I would like to move a bmp or jpg picture through the bottom of my dialog(say a joker running through the bottom of my dialog) just like a bonzy buddy in which a chimpanzy walks through the bottom of desktop,jumps ,eats a banana etc...
Can any one suggest a method for it?

Cry | :((

Shibu K.V.
Senior Research Associate.
VLSI ASIC Hardware Design Group
Electronics R&D Centre,Trivandrum
India

Re: Moving Image

Christian Graus27-Jun-02 22:13

Christian Graus

27-Jun-02 22:13

OnEraseBkgrnd

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied. - Alex, 13 June 2002

Minimizing Dialog

Shibu.V.Nair27-Jun-02 21:30

Shibu.V.Nair

27-Jun-02 21:30

Hi,
I'm working with a dialog based application in which the main dialog is used for logon operation.If the user id and password are correct the main dialog is closed(OnOk() is called) and a second dialog is created using DoModal().But the problem is that if i minimise this dialog its icon is not seen on the task bar just like internet explorer window which moves on to the taskbar on minimising it.In my application if i minimise my dialog the title bar of my dialog gets minimised and it moves on to the left corner of my screen and no information about that window is available on the task bar.How can i rectify it?
Rose | [Rose]

Shibu K.V.
Senior Research Associate.
VLSI ASIC Hardware Design Group
Electronics R&D Centre,Trivandrum
India

Re: Minimizing Dialog

benjymous28-Jun-02 0:34

benjymous

28-Jun-02 0:34

Here's how to give a sub-dialog it's own icon

in the constructor of your sub dialog class

m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

and in the dialog's ::OnInitDialog

// Set the icon for this dialog.  The framework does this automatically
//  when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE);       // Set big icon
SetIcon(m_hIcon, FALSE);      // Set small icon

Override the dialog's ::OnPaint

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CMyDialog::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

And finally, as a protected member of the dialog class:

HICON     m_hIcon;

All of this will have been done automatically for your main dialog by the MFC AppWizard

--
Help me! I'm turning into a grapefruit!

Re: Minimizing Dialog

Fredrik Skog28-Jun-02 0:38

Fredrik Skog

28-Jun-02 0:38

I think you should consider the design of the program. You seem to go about the business backwards.
My suggestion is to open a modal dialog (the log-on dialog) from the OnInitDialog function of your main app. Your main app will then be displayed after returning from the log-on dialog.

Cheers,
Fredrik

<right>Sonork ID: 100.11430:PhatBoy

'It is so much simpler to bury reality than it is to dispose of dreams.'

- Don Delillo, Americana

Re: Minimizing Dialog

28-Jun-02 3:41

hi Got ur problem...u hav 2 dialogs..and in a dialog based app u make ur default dialog login dialog and u create another dialog class to process after the login...the MFC gives all th esupporting code in to the first dialog ..and u want the same for second dialog..so u ask for some code for the minimisation and icon in Taskbar...there is no need of that..u just make the first dialog(MFC give al supporting code)as the dialog after login and u just create a second dialog class and use that in ur OnInitDialog() of the first..problem solved..!!!

"Eliye pedichu illam chudano"???

Renjith-The CPian.

Ms Word Automation PageWidth HiMetric

Braulio Dez27-Jun-02 21:22

Braulio Dez

27-Jun-02 21:22

Hi,

MS Word Automation, If I call the method PageSize, I get the output in inches, how can I get it in Milimeters or Himetric ?

Thanks in advance, greetings
Braulio

PS.: I HATE INCHES !!!! :-P

Re: Ms Word Automation PageWidth HiMetric

Mike Nordell28-Jun-02 9:08

Mike Nordell

28-Jun-02 9:08

returnvalue * 25.4 ?

Re: Ms Word Automation PageWidth HiMetric

Braulio Dez30-Jun-02 21:56

Braulio Dez

30-Jun-02 21:56

It seems that not, I don´t know why but it seems that Ms Word makes something strange there Frown | :-(

Thanks
Braulio

crypted CFile, used with CArchive

eXplodus27-Jun-02 20:51

eXplodus

27-Jun-02 20:51

somewhere on the web, i thought it was here on codeproject but i dont know it really anymore
i found an article frome someone who used a CFile and make it own crypted version of it and make it usable with CArchive. Did someone know this article. I dont find it anymore.

Cry | :((

VERY urgent(VC++) !!!!!!!!

shanker27-Jun-02 20:48

shanker

27-Jun-02 20:48

i am creating activex combobox using visual c++. i am facing one prob... i would like to know how to resize the combobox corresponding to its fontsize. whenever the fontsize or fontchanges the control has to resize not only the edit portion also the dropdown portion.
thanks in advance.

Shanker

Source of spreadsheet program

ivex27-Jun-02 20:06

ivex

27-Jun-02 20:06

I want to code a spreadsheet program in DOS mode, can anyone suggest some source code? Thanks!

Set Title in MDIChildFrame

27-Jun-02 20:04

I created an MDI application. I dynamically create the document, and the child frame in an MDI applicaiton. However, the title bar in the MDI child frame is empty. I tried use pFram->SetWindowText(myTitle), but it doesn't work. How can I set the title for an MDI child frame programatically ?

Re: Set Title in MDIChildFrame

Bill S27-Jun-02 20:18

Bill S

27-Jun-02 20:18

Try this:

CDocument::SetTitle(LPCTSTR lpszTitle)

Re: Set Title in MDIChildFrame

louise27-Jun-02 21:21

louise

27-Jun-02 21:21

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

cs.style &= ~(LONG) FWS_ADDTOTITLE; // add your source code!!!
// and u use SetWindowText!!!

if( !CMDIChildWnd::PreCreateWindow(cs) )
return FALSE;

return TRUE;
}

Why is this not 512 bytes!

clintsinger27-Jun-02 18:09

clintsinger

27-Jun-02 18:09

I have some code to read the partition table. The structure is supposed to be 512 bytes to read from the disk and I have translated from the Pascal code the following structure to c++:

(The pascal code works fine as it is 512 bytes)

TPartEntry = record
	boot_ind    : Byte;		// 0x80 - active
	head        : Byte;		// starting head
	sector      : Byte;		// starting sector
	cyl         : Byte;		// starting cylinder
	sys_ind     : Byte;		// What partition type
	end_head    : Byte;		// end head
	end_sector  : Byte;	   // end sector
	end_cyl     : Byte;		// end cylinder
	start_sect  : UINT;	   // starting sector counting from 0
	nr_sects    : UINT;  	// nr of sectors in partition
  end;

  TDiskTable = record
   Data  : array[1..446] of Char;
   Table : array[1..4] of TPartEntry;
   Signature : WORD;
  end;

... to get this...

typedef struct tagPARTENTRY
{
	BYTE		bBoot;	 	// 0x80
	BYTE		bHead;	 	// starting head
	BYTE		bSector; 	// starting sector
	BYTE		bCyl;	 	// starting cylinder
	BYTE		bSysInd; 	// What partition type
	BYTE		bEndHead; 	// end head
	BYTE		bEndSector;     // end sector
	BYTE		bEndCyl; 	// end cylinder
	UINT		unStartSect;    // start sector starting from 0
	UINT		unNumSects;     // number of sectors in partition
} PARTENTRY;

typedef struct tagDISKTABLE
{
	CHAR		cData[446];
	PARTENTRY 	tTable[4];
	WORD		wSignature;
} DISKTABLE;

When I do a sizeof(DISKTABLE) it returns a size of 516 bytes. When I manually add up the values I get 512 bytes. Where are the other 4 bytes coming from and what am I doing wrong? WTF | :WTF:

Cheers,
Clint

Re: Why is this not 512 bytes!

Joaquín M López Muñoz27-Jun-02 20:03

Joaquín M López Muñoz

27-Jun-02 20:03

Alignment issues, I guess. Try enclosing the definition of the structure between alignment #pragmas like this:

#pragma pack(push,PREVIOUS_PACK_VALUE,1)
... // your definition here
#pragma pack(pop,PREVIOUS_PACK_VALUE)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Why is this not 512 bytes!

clintsinger28-Jun-02 6:46

clintsinger

28-Jun-02 6:46

I have never used the #pragma pack and documentation is a little obscure as to how to use it. I was wondering if you could give me an example based on my sampel code which I provided in my previous post.

Thanks in advance!

Clint

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