Re: ComboBox inside of CDialog - C / C++ / MFC Discussion Boards

AlexO8-Jul-03 3:55

8-Jul-03 3:55

Do you have to use ActiveX or may be you could settle for the common control? If yes use resource editor in VC7(6) and pick it from the Dialog editor's list of available controls.

Re: mfc activeX control

gucy8-Jul-03 15:21

gucy

8-Jul-03 15:21

i don't want to use ActiveX control,i want common control.
But i use vc6.0 resource editor.is there any solution?

gucy

Re: mfc activeX control

gucy8-Jul-03 16:28

gucy

8-Jul-03 16:28

i'v found the control now

gucy

CEditView MFC app

Jay Hova8-Jul-03 1:38

Jay Hova

8-Jul-03 1:38

Hi,

Created a MFC app that uses the CEditView as a base class. I wanted to know if it was possible to insert text on the editor that pops up automatically. If it is, can i make it so that it comes up on each editor window that comes up?

Also, is there a way to change the app from a multiple document app to just a single document app without starting over?

Thanks in advance.

Re: CEditView MFC app

Iain Clarke, Warrior Programmer8-Jul-03 2:03

Iain Clarke, Warrior Programmer

8-Jul-03 2:03

Lookup CView / CEditView :: OnInitialUpdate ().
This would be an ideal place for a "SetText (...)".

It is possible to switch to an SDI configuration, but I can't remember all the steps.
If you have a lot of code you don't want to simply copy across, create a blank SDI and
a blank MDI app, and compare the two to get the information you want.

Iain

Re: CEditView MFC app

Jay Hova8-Jul-03 2:45

Jay Hova

8-Jul-03 2:45

There is not an OnInitialUpdate() in my program. I did not see it in class wizard either.

Could you possibly explain to me in more detail?

Is there another way to do this?

thanks again for your help.

ComboBox inside of CDialog

pdunn8-Jul-03 1:37

pdunn

8-Jul-03 1:37

I have a CDialogBar and I put a ComboBox and Button on it. I used the ComboBox property 'Data' and added ITEM; to it. When I load my appl. the word ITEM do not appear. My ComboBox type is a DropDown type, also I wanted the user to be able to add in new items in the combobox. How do I accomplish that?

Re: ComboBox inside of CDialog

Iain Clarke, Warrior Programmer8-Jul-03 1:59

Iain Clarke, Warrior Programmer

8-Jul-03 1:59

The combobox "data" you type in using the resource editor actually exists as a separate resource
(DLGINIT) in the rc file. This is referenced when a dialog box is created, but presumably not
for a dialog bar.

Fortunately, it is not difficult to add items to a combo box.

After creating the dialog bar, get a pointer to the combo box.

CComboBox *cb = (CComboBox *) (pBar->GetDlgItem (IDC_MYCOMBO));
cb->AddString (....);
cb->SetCurSel (....);

Iain.

Re: ComboBox inside of CDialog

pdunn8-Jul-03 2:40

pdunn

8-Jul-03 2:40

The box initializes, but when the user type in something, the program doesn't recognize it and also the initial information is deleted and the combo box is empty again.

This is the code to get the information out.

pActWin = GetActWin();

//Get the MainFrame obj and get the address out of the combo box

CMainFrame* pFrame = ((CMainFrame*) m_pMainWnd);
CDialogBar* pDBar = &(pFrame->m_wndAddressBar);
CComboBox* pCombo = (CComboBox*)

pDBar->GetDlgItem(IDC_Address);
CString strAddress = _T("");

int nIndex = 0;
nIndex = pCombo->GetCurSel();
if(nIndex == CB_ERR)
return;
pCombo->GetLBText(nIndex,strAddress);

How do I let the user enter in information and I do I get that information out?

Thanks for the help

How to do a ListBox by self?

David12158-Jul-03 1:04

David1215

8-Jul-03 1:04

I try to do a ListBox by myself,because i need a different style ListBox.
Now, i have a problem.it's a scroll bar(yes, the scroll bar by myself).
i don't know how to calculate the scroll bar pos,have any one ever do the ListBox by self?Please Help me!thx!

Re: How to do a ListBox by self?

Iain Clarke, Warrior Programmer8-Jul-03 1:47

Iain Clarke, Warrior Programmer

8-Jul-03 1:47

Scroll bars and window controls are a messy topic. I would look at
http://www.codeproject.com/useritems/SkinList.asp[^]
for possible enlightenment...

Iain.

Re: How to do a ListBox by self?

David12158-Jul-03 15:34

David1215

8-Jul-03 15:34

Thank you,I found a method can to calculate the pos.

ADO connection pooling

Imtiaz Murtaza8-Jul-03 0:09

Imtiaz Murtaza

8-Jul-03 0:09

Can anyone please tell me how to use ADO connection pooling using Visual C++.

Imtiaz

cout vs. printf?

DaveE9th7-Jul-03 23:56

DaveE9th

7-Jul-03 23:56

What's the basic difference between cout and printf, and between cin and scanf?

Thanks

Re: cout vs. printf?

Rage8-Jul-03 0:42

Rage

8-Jul-03 0:42

cout and cin are stream functions, outputting a stream to the display. They use the < and > operators, which can be overriden to set up the display according to what is in the stream. This is C++.

printf and scanf are C functions, which have their own formatting process.

~RaGE();

Re: cout vs. printf?

Rickard Andersson²⁰8-Jul-03 2:15

Rickard Andersson²⁰

8-Jul-03 2:15

Rage wrote:
They use the < and > operators

You mean << and >>? Poke tongue | ;-P

Rickard Andersson
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

Re: cout vs. printf?

Rage8-Jul-03 3:23

Rage

8-Jul-03 3:23

Yup. How come it did not show both of them ? Unsure | :~

~RaGE();

Re: cout vs. printf?

Ryan Binns8-Jul-03 3:50

Ryan Binns

8-Jul-03 3:50

Rage wrote:
How come it did not show both of them ?

Did you write them as '<' and '>'?

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: cout vs. printf?

keegan8-Jul-03 3:23

keegan

8-Jul-03 3:23

if you want to be picky, shouldt it be

<< or >>? since they cant and dont use both at the same time.. WTF | :WTF:

*.*

Re: cout vs. printf?

AlexO8-Jul-03 3:59

AlexO

8-Jul-03 3:59

std stream classes are type safe. Var arg nature of printf family is dangerous. Form the purist point of view std is more OO.

Re: cout vs. printf?

DaveE9th8-Jul-03 8:16

DaveE9th

8-Jul-03 8:16

Thanks guys, I'm doing a lot of reading...every little bit helps.
Cool | :cool:

binary sort function?

DaveE9th7-Jul-03 23:08

DaveE9th

7-Jul-03 23:08

I have been trying alter the following program to store 13 digit numbers, so I tried to use "double" instead of "int" for my return type. It doesn't work. I want to create a sort program that can store 13 digit part numbers and display corresponding character data relating to those numbers. Is a binary sort function good for this or should I consider a different type of function? If the binary sort will work good, how do I use 13 digit double data types with this function? Thanks.
------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>

int values[] = { 10, 20, 25, 40, 90, 100 };

int compare (const void * a, const void * b)
{
return ( *(int*)a - *(int*)b );
}

int main ()
{
int * pItem;
int key = 40;
pItem = (int*) bsearch (&key, values, 6, sizeof (int), compare);
if (pItem!=NULL)
printf ("%d is in the array",*pItem);
else
printf ("%d is not in the array",key);
return 0;
}

Re: binary sort function?

Ryan Binns7-Jul-03 23:28

Ryan Binns

7-Jul-03 23:28

Why doesn't using double work? You only need to make a few changes:

double values[] = { 10.0, 20.0, 25.0, 40.0, 90.0, 100.0 };

int compare (const void * a, const void * b)
{
   double _a = *(double*)a;
   double _b = *(double*)b;
   if( ABS(_a - _b) < 0.00000001 )
      return 0;
   else if( _a < _b)
      return -1;
   else
      return 1;
}

int main ()
{
   double * pItem;
   double key = 40;
   pItem = (double*) bsearch (&key, values, 6, sizeof (double), compare);
   if (pItem!=NULL)
      printf ("%lf is in the array",*pItem);
   else
      printf ("%lf is not in the array",key);
   return 0;
}

Since doubles are not exact, when you compare them, you might want to add in a delta value, where numbers that are within this amount of each other are considered equal, like I've put in the compare function. If you don't want this, then change the first if statement so it is just (_a == _b).

BTW, when you're using ints, I don't recommend just returning the difference between them, rather return -1 if a < b or 1 if a > b or 0 if they are equal. Some implementations of the bsearch() function rely on these values being exact.

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: binary sort function?

DaveE9th8-Jul-03 0:17

DaveE9th

8-Jul-03 0:17

Ryan,

Question: what is ABS? I'm getting an error message saying it's an undeclared identifier.

Thanks, Dave

Re: binary sort function?

Ryan Binns8-Jul-03 0:23

Ryan Binns

8-Jul-03 0:23

Oops, left that out Blush | :O

. It just finds the absolute value.

#define ABS(a) ( (a) < 0 ? -(a) : (a) )

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"

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