C / C++ / MFC

how to add the file names in a directory to a combobox

23-Mar-04 3:16

Construct a CFileDialog object.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Deepak Samuel23-Mar-04 3:12

Deepak Samuel

23-Mar-04 3:12

Hi,
How can we add the file names in a directory to a combobox ?
Thanks,

Deepak Samuel

Re: how to add the file names in a directory to a combobox

David Crow23-Mar-04 3:16

Re: how to add the file names in a directory to a combobox

23-Mar-04 3:16

Use the AddString() method. If you are not using MFC, then send the control a CB_ADDSTRING message.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Antony M Kancidrowski23-Mar-04 3:37

Antony M Kancidrowski

23-Mar-04 3:37

If you want to get the files also you need to use FindFirstFile() and FindNextFile().

A quick example of FindFirstFile straight from MSDN

#define _WIN32_WINNT 0x0400<br />
<br />
#include <windows.h><br />
#include <stdio.h><br />
<br />
int main(int argc, char *argv[])<br />
{<br />
  WIN32_FIND_DATA FindFileData;<br />
  HANDLE hFind;<br />
<br />
  printf ("Target file is %s.\n", argv[1]);<br />
  hFind = FindFirstFile(argv[1], &FindFileData);<br />
  if (hFind == INVALID_HANDLE_VALUE) <br />
  {<br />
    printf ("Invalid File Handle. GetLastError reports %d\n", GetLastError ());<br />
    return (0);<br />
  } <br />
  else <br />
  {<br />
    printf ("The first file found is %s\n", FindFileData.cFileName);<br />
    FindClose(hFind);<br />
    return (1);<br />
  }<br />
}

Ant.

Re: how to add the file names in a directory to a combobox

David Crow23-Mar-04 3:46

Re: how to add the file names in a directory to a combobox

23-Mar-04 3:46

Of course, but since the verb in the original post was "add", it only made sense that the combobox was the subject.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Antony M Kancidrowski23-Mar-04 11:48

Antony M Kancidrowski

23-Mar-04 11:48

Sorry David my post was not meant as a critisism of yours.

Since English is quite ambiguous I thought I would fill the possible missing part Smile | :)

Ant.

flow chart in Visual c++

roshmik23-Mar-04 3:01

roshmik

23-Mar-04 3:01

is there any library which i can use to make a flow chart in VC++

the weakest link

nicolas thompson23-Mar-04 2:59

nicolas thompson

23-Mar-04 2:59

I'm trying to put together a program to simulate the weakest link scorinbg system. The player is shown a random number and has to guess whether the next random number will be higher or lower than the current one.
For the random number I think I use rand() and then if statments to check the answer.
if edit1 < than edit2 ->then counter move up
could anybody bring this more into focus for me. I design my uml but having trouble with the coding.
nicolas Confused | :confused:

Re: the weakest link

David Crow23-Mar-04 3:14

Re: Control variable of Grid

23-Mar-04 3:14

set r = pseudo-random number
while not done
  prompt user for guess
  if guess < r
    tell user their guess is too low
  else if guess > r
    tell user their guess is too high
  else
    tell user they are right
wend

Not much to it.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Control variable of Grid

Caoimh23-Mar-04 2:36

Caoimh

23-Mar-04 2:36

I've created a control variable to the activex control flexgrid, when I attempt to set the a cell value from another class the program terminates. I've no problem accessing CString variables of the other class its just the control variable (m_ctlFGrid) thats causing the problem.

Any ideas!!!

Kind Regards
Caoimh

Caoimh23-Mar-04 5:28

Caoimh

23-Mar-04 5:28

I would really be happy, if someone could sort this problem.

Re: Can't read using ListView_GetItemText

Prakash Nadar23-Mar-04 2:27

How to save programatically drawn figure to jpg file

23-Mar-04 2:27

Windows are represented by handles and they are global to windows rite ?

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JHAKAS23-Mar-04 1:48

JHAKAS

23-Mar-04 1:48

Hello

Using MFc i am drawing some figures on the View. Now what i want is to save the content in the device context (Memory device context or client device context) to a Jpeg file.

I had found and searched the codeguru and codeproject projects. But there are code available for conversion of file from BMP to Jpeg and not directly CDC --> Jpeg.

I have gone thru CXImage slighly but there also i found above step only. Can any body help me in saving the CDC to JPEG.

Thanks in advance

Leave your mark wherever you go

Re: How to save programatically drawn figure to jpg file

Mike Dimmick23-Mar-04 4:01

Mike Dimmick

23-Mar-04 4:01

(Didn't I just post this last week?)

Create a Device-Independent Bitmap with CreateDIBSection, select it into a device context compatible with the DC which holds the image you want to save, use BitBlt to copy the saved image to the compatible DC. You can then access the DIB pixel values directly in the array you passed to CreateDIBSection.

Stability. What an interesting concept. -- Chris Maunder

Re: How to save programatically drawn figure to jpg file

JHAKAS24-Mar-04 21:03

JHAKAS

24-Mar-04 21:03

Thanks for you kind suggestions.

I want to save my Device Context contents to Jpeg file.
I am newbie and it seems to me that your suggestion will help me to save the dc content to the BMP file.

Can you give me idea how to save this to Jpeg file.

Mike Dimmick wrote:
(Didn't I just post this last week?)

Can you provide me link to that thread. Thanks for your responce

Leave your mark wherever you go

Flickering Problem in Dialog base application

Mayank Kumar23-Mar-04 1:43

Mayank Kumar

23-Mar-04 1:43

Hi,
I m a student of MCA final year and I m working in VC. I used a dialog base application. I used BMP's for the background and for every button in the application.
The problem is that whenever I use the DoModal(), to show the next dialog, I get the flickering problem. Anyone know about this problem ??
Thanks in advance.
Please reply soon..
Mayank Kumar

Prakash Nadar23-Mar-04 2:29

23-Mar-04 2:29

Handle OnEraseBackground and do nothing just return 0

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Mayank Kumar23-Mar-04 3:28

Mayank Kumar

23-Mar-04 3:28

Hi Mr. Prakash,
Thanks for the reply. I tried the OnErase method, but the result is same.
Actually, I am using different dialog boxes. Everytime, when I load the next dialog box, I hide the previous one. There is no link between the dialog box. I am simulating the application wizard without using the prperty sheet. I got the flickering problem when I load the next dialog box and hide the previous one.
Do u know anyother method for the flickering problem.
Please reply
Mayank Kumar

Prakash Nadar23-Mar-04 3:48

23-Mar-04 3:48

humm Handling onerasebackground should have solved the problem if i had understood the problem rite...

Flickering is usally caused because of erasing the bk and repainting it...

If you are bitblting the image in OnPaint event how are you doing it?
Can i have the Onpaint code if it is small and simple to understand. Smile | :)

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Anonymous23-Mar-04 4:02

Anonymous

23-Mar-04 4:02

Hi Mr. Prakash,
I am sending u the code of one of the OnPaint function.
The Code is ....

void CDialogSingleConversion::OnPaint()
{
CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here

//for background image
// CPaintDC dc( this );
CBitmap bmp, *poldbmp;
CDC memdc;

// Load the bitmap resource
bmp.LoadBitmap( IDB_BITMAP_BACKGROUND);

// Create a compatible memory DC
memdc.CreateCompatibleDC( &dc );

// Select the bitmap into the DC
poldbmp = memdc.SelectObject( &bmp );

// Copy (BitBlt) bitmap from memory DC to screen DC
dc.BitBlt( 0, 0, 644, 489, &memdc, 0, 0,SRCCOPY );

memdc.SelectObject( poldbmp );
//background end here
// Do not call CDialog::OnPaint() for painting messages
}
In this code I m just stting the background of the dialog box. I m doing this for each dialog box. Also I am using my own class called CImageButton, to put the images on the buttons. I m sending u the code for the Oninitdialog box for one of the dialog box. The code is::

BOOL CDialogSingleConversion::OnInitDialog()
{
CDialog::OnInitDialog();

// TODO: Add extra initialization here
//Code to set the bmp's for the buttons..

m_btnNext.Attach(IDC_BUTTON_NEXT,this,IDB_BITMAP_NEXT,IDB_BITMAP_NEXT);
m_btnBack.Attach(IDOK,this,IDB_BITMAP_BACK,IDB_BITMAP_BACK);
m_btnClose.Attach(IDC_BUTTON_CLOSE,this,IDB_BITMAP_CLOSE,IDB_BITMAP_CLOSE_R);
m_btnMinimize.Attach(IDC_BUTTON_MINIMIZE,this,IDB_BITMAP_MINIMISE,IDB_BITMAP_MINIMISE_R);
m_btnBrowseOutput.Attach(IDC_BUTTON_BROWSEOUTPUT,this,IDB_BITMAP_BROWSE,IDB_BITMAP_BROWSE_R);
m_btnBrowseInput.Attach(IDC_BUTTON_BROWSEINPUT,this,IDB_BITMAP_BROWSE,IDB_BITMAP_BROWSE_R);

CFont *m_Font = new CFont;
m_Font->CreatePointFont(100,"Verdana");
m_Destination.SetFont(m_Font);
m_FileName.SetFont(m_Font);
m_FileSize.SetFont(m_Font);
m_SelectFile.SetFont(m_Font);

CFont *m_Font1 = new CFont;
m_Font1->CreatePointFont(150,"Verdana");
m_Heading.SetFont(m_Font1);
return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}

here m_btnNext etc are the obj of my class CImageButton and they are the member variables of the dialog class. Here I am attaching the bitmaps with the buttons. I m using the bitblt function for applying the BMP's on the buttons.
If u need any other info then plz let me know.
Thanks and Regards
Mayank Kumar

Prakash Nadar23-Mar-04 5:26

23-Mar-04 5:26

Firstly is it the flickering of the image or the flickering of the dialog?

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Anonymous23-Mar-04 17:36

Anonymous

23-Mar-04 17:36

Hi Mr. Prakash
It is the flickering of the dialog Box and I think it is due to the images which i m using for the background and buttons.
thanks and regards
Mayank Kumar

Prakash Nadar23-Mar-04 19:22

23-Mar-04 19:22

Its not due to the images, its due to closing and showing the dialogs....
refer David Crow's solution , use propertysheet instead.

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David Crow23-Mar-04 3:55

23-Mar-04 3:55

Mayank_pumca wrote:
I am simulating the application wizard without using the prperty sheet.

Why? When one dialog is destroyed/hidden and another is created/shown, there is going to be "flicker."

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)