C / C++ / MFC

7-Jul-08 22:08

I have two dialogs in my application.
I get the second dialog when I click on a button.
In the second dialog i have three textboxes,of which the value of only one of them have to be added to a combobox.the combo box resides in the first dialog.
how could i get the value of the textbox in the first dialog box(combo residing in it).Also the value has to be added to the combo only when i click an "add" button

_AnsHUMAN_ 7-Jul-08 22:22

7-Jul-08 22:22

By using get/set functions in one class and having a pointer of the parent using GetParent(/*params*/); you can access the member of one class in another. It doesn't matter much where you want to add the variable once you have access to it in either of the classes. Big Grin | :-D

Alternatively you can also pass pointer of one class to another if your dialogs don't support parent/child relationship

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

_AnShUmAn_

projectip7-Jul-08 22:36

7-Jul-08 22:36

I wrote the following code..

CString str;<br />
	GetDlgItemText(IDC_EDIT1,str);<br />
	CWnd *p=GetParent();<br />
	p-&gt;SetDlgItemText(IDC_COMBO1,str);

IDC_EDIT1 is in 2nd dialog.
IDC_COMBO1 is in 1st dialog.

_AnsHUMAN_ 7-Jul-08 23:02

7-Jul-08 23:02

This won't be a good idea. You must use Get/Set member functions to access all the variables of the parent/child class, this helps you making sure that the variables are not accidently modified.
so in child class you can write
p->GetSomeValue(); where GetSomeValue would be a function in the parent class that would be returing a string which is then displayed in the edit box in the child class.
I hope it makes sense to you.

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

_AnShUmAn_

projectip7-Jul-08 23:17

7-Jul-08 23:17

I want it in the revrerse order.i need value of textboxes in child in the parent class.

_AnsHUMAN_ 7-Jul-08 23:32

7-Jul-08 23:32

Do you want to say that once the value in the text box is changed it should get updated in the combo box in the parent. To implement this you will need event notification mechanism by which you can notify the parent that the text in some control of the child has changed and the value in the parent is to be updated.
An easier way would be, when the user clicks on some button that dismisses the child dialog you can send the value in the parent. For this you need to check the return value from the child dialog in the parent something like
if(IDOK==myChildDlg.DoModal())
{
// Update values in the combo here that are taken from the child
}

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

_AnShUmAn_

projectip8-Jul-08 0:17

Re: dialog help [modified]

8-Jul-08 0:17

I added the following code in a button click in the parent dialog:

combodlg cd;<br />
	cd.DoModal();<br />
	CString str="";	<br />
	m_combo.AddString(cd.str2);

and the follwing code in child dialog
GetDlgItemText(IDC_EDIT1,str2);
declared a variable CString str in header file of child dialog.thanks for ur suggestions.

Varghese Paul M8-Jul-08 1:16

Varghese Paul M

8-Jul-08 1:16

CFirstDialog::OnInvokeSecondDialog()
{
   CSecondDialog dlg;
   if(dlg.DoModal() == IDOK)
   {
      this->ComboBoxString = dlg.TextBoxString;
   }
}

ComboBoxString is declared as CString member in CFirstDialog. ( Use this to populate the combo later )
TextBoxString is declared as a CString member in CSecondDialog associated with the EditControl.

modified on Tuesday, July 8, 2008 7:45 AM

Rajesh R Subramanian8-Jul-08 0:52

Rajesh R Subramanian

8-Jul-08 0:52

May be you could have an overloaded constructor for your second dialog, which accepts a pointer to a string. Smile | :)

Step 1: In your first dialog:

#include "NewDlg.h" //Header of the new dialog

CString cst;
CNewDlg cnd(&cst);
if(cnd.DoModal() == IDOK);
   AfxMessageBox(cst);

Step 2: Overloaded constructor of the new dialog:

CNewDlg::CNewDlg(CString *str, CWnd *pParent):
CDialog(CNewDlg::IDD, pParent), m_str(str)
//m_str is a member variable, defined as CString *m_str;
{
}

Step 3: In the OnOK() handler of the second dialog:

CString szVal;
m_edit.GetWindowText(szVal); //m_edit is a control variable.
*m_str = szVal;
CDialog::OnOK();

A crude way, but it works. Smile | :)

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Get focus

iayd7-Jul-08 21:50

iayd

7-Jul-08 21:50

Hi,

I have many dialog windows in my program.Some of them are child window.I want to know that which button has the focus in a certain time.Actually,I want to do that the button will be pressed which has the focus in a certain time.How can I do that?

Thanks,
ibrahim

Re: Get focus

Yajnesh Narayan Behera8-Jul-08 1:54

Yajnesh Narayan Behera

8-Jul-08 1:54

The solution is not as straight forward as seems to be. My first approach was to handle WM_SETFOCUS, but it will not work. But I have faced a similar situation my requirement was different. So let me give you the solution, just override OnCommand & check for notification code of WPARAM. Laugh | :laugh:

its showing Error ?

nisha000007-Jul-08 21:24

nisha00000

7-Jul-08 21:24

hi
this is my code ..its working good in 3digit sorting algorithm.

#define next(i) ((i) < 5 ? (i) + 1 : 1)
#define previous(i) ((i) > 1 ? (i) - 1 : 1)

int main()
{
unsigned long i, aux, j, cnt;

for (i=1 ; i<6 ; i++)
{
for (aux = next(i) ; aux != previous(i) ; aux = next(aux))
{
cout << i << aux << next(aux) << endl;
}

}

return 0;
}

But, i replaced 5 into 100 ..its showing wrong sorting why?

#define next(i) ((i) < 100 ? (i) + 1 : 1)
#define previous(i) ((i) > 1 ? (i) - 1 : 1)

int main()
{
unsigned long i, aux, j, cnt;

for (i=1 ; i<101 ; i++)
{
for (aux = next(i) ; aux != previous(i) ; aux = next(aux))
{
cout << i << aux << next(aux) << endl;
}

}

return 0;
}

Thanks and Regards

Nisha.S

Re: its showing Error ?

_AnsHUMAN_ 7-Jul-08 21:44

how to know which port is being used by which process with windows API?

7-Jul-08 21:44

That is because you didn't try to get into the code you were given yesterday (that works with 3 digits) Sigh | :sigh:

. It would be better for you to understand the algorithm for 3 digits before you move ahead to implement the second one. BTW what happens when you try and debug your new code?
And the error displayed is...........................

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

_AnShUmAn_

ZhiLiangLin7-Jul-08 21:08

ZhiLiangLin

7-Jul-08 21:08

as subject~

Re: how to know which port is being used by which process with windows API?

_AnsHUMAN_ 7-Jul-08 21:48