Re: On Edit box - C / C++ / MFC Discussion Boards

I have a small doubt on edit box. i am making a dialog based application. i have three edit boxes in the screen.

1.want to know how to set a range(eg 1-10) if i enter 11 it should pop a message.
2.i want to set the final value of the first edit box as the minimum value of the third edit box and the final value of the second edit box as the final value of the third edit box.

hope the query is understood.

to restrict an edit to a given range, you could attach it a spin control.

for the second point, where are you stuck ? getting/setting an editbox value ? or the calculation behind that ?

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extremely sorry for again putting the query in the forum.. well i wanted to know how to set the third edit box value.

Chandrasekharanp wrote:
extremely sorry for again putting the query in the forum..

no problem mate Smile | :)

Chandrasekharanp wrote:
well i wanted to know how to set the third edit box value

like this for instance:

CEdit* pEdit = (CEdit)GetDlgItem(IDC_MY_EDIT);
 
pEdit->SetWindowText(_T("Hello World"));

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this i am aware..

take for example.

my first edit box minimum range is "1" and maximum range is "10". and the second edit box the mininum range is "1" and the maximum range is "20". i want "10" to be the minumum range of the third edit box and 20 to be the maximum range of the third edit box.

hope its clear.

In this case, I would make a function validating every editbox content. And if all are ok, then return true.
If you have lot of EditBoxes (I have one dialog with 24 coloured comboboxes), you can make it dinamically. I put the example to NUM_EDITS different editboxes.

//CMyDialog.h
CEdit* m_aPEdits [NUM_EDITS];
.
//CMyDialog.cpp

void CMyEdit::OnInitDialog ()
{
   //More code

   m_aPEDits [0] = (CEdit*) GetDlgItem(IDC_MY_EDIT1);
   m_aPEDits [1] = (CEdit*) GetDlgItem(IDC_MY_EDIT2);
   m_aPEDits [2] = (CEdit*) GetDlgItem(IDC_MY_EDIT3);
   m_aPEDits [3] = (CEdit*) GetDlgItem(IDC_MY_EDIT4);
   //and so on

   //More code
}


//
BOOL CMyEdit::ValidateEditContents ()
{
   int nError = 0;

   for (int i = 0; i < NUM_EDITS; i++)
   {   int nTemp = -1;
       nTemp = itoa (m_aPEdits[i]->GetDialogText ());
       if ( ((10 * i) < nTemp) && (nTemp < (10 * (i+1))) )
          continue;

       nError++;  //This will execute only when the if is not being executed
   }

   if (!nError)
      return TRUE;

   return FALSE;
}

//
void CMyEdit::OnOK ()
{
   //More Code

   if (ValidateEditContents ())
      m_bDlgOK = TRUE;

   //More code
}


//And where you call the dialog...

void SomeClass::A_Function ()
{
    //More code


    CMyDialog newDlg;

EditStartLabel:
    if (IDCANCEL == newDlg.DoModal ())
       goto EditEndLabel;

    if (!newDlg.m_bDlgOK)
    {   MessageBox ("One of the edits has an invalid value, please correct it", "Error", MB_OK);
        goto EditStartLabel;
    }

    //The datas were OK
    //So you can bring them here and save, operate or do whatever you want
    //with the member variables, i.e. newDlg.m_nAnInt;

EditEndLabel:
    //here you can free memory
    //or do whatever you want to be executed ALL the times this function is called
    return;
}

I know that is not an elegant code, but it works perfectly. I won't probably use this structure in my next project or if i rewrite this one in the future, so any tip, correction, opinion... will be wellcome.

But to start getting the concept about data validation in a "simple" way I think is good

Hope it helps

Greetings.

--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

Goto/Labels !!! your code belongs to the Coding Horror forum ! Poke tongue | ;-P

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I know

, it was my first MFC programm but the final project of studies, my teacher was "Dr." in java and wanted a particular structure very easy to read, he changes my structure at the third month Mad | :mad:

. So I started to ask him what he wanted before coding new things.

Why do you think I am going to rewrite my whole programm?

It has some code horrors (like this) that I want to erase and I want to add language support, "standard" windows functions like undo, copy, paste... and port some things to DLLs.

But the doubt was about validation and functionality and this aspect is quite clear Poke tongue | ;-P

Greetings.

--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

you could start by changing your code to using while/for loops, because goto/labels don't bring anything useful here. actually, the only point they could be useful is to get out of several nested loops, for performance purpose... i don't see that in you code Wink | ;)

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I still have lot to learn, thanks for the advice Smile | :)

I had thought use the do... while (!m_bDlgOk)

Greetings.

--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

toxcct wrote:
to restrict an edit to a given range, you could attach it a spin control.

That would not keep the user from typing 11 into the control.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

yeah, i figured that out after i posted...

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in MFC you can use:

DDV_MinMaxInt(pDX, IDC_EDIT_BOX, 1, 10);

in the function DoDataExchange of your dialog...

Haroon Sarwar wrote:
DDV_MinMaxInt(pDX, IDC_EDIT_BOX, 1, 10);

This is a bad idea as it falsely gives the user the impression that everything is fine until they decide to click the OK button. Then they get some sort of error message. It's better to disable the OK button until all controls contain valid data.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

thanks for the piece of code.. now i have another doubt.. can i use this piece of code multiple times in the DoDataExchange Function..

something like this,

<br />
        DDX_Control(pDX, IDC_EDIT1, m_edit1);<br />
	DDX_Text(pDX, IDC_EDIT2, m_edit2);<br />
	DDX_Text(pDX, IDC_EDIT3, m_edit3);<br />
	DDV_MinMaxInt(pDX, IDC_EDIT1, 1, 10);<br />
	DDV_MinMaxInt(pDX, IDC_EDIT2, 1, 20);<br />
	DDV_MinMaxInt(pDX, IDC_EDIT3, 20, 30); <br />

Chandrasekharanp wrote:
...can i use this piece of code multiple times in the DoDataExchange Function..

Yes, but they don't do validation until the OK button is clicked.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Are you using MFC? What is it that you are wanting to do if the entered value is out-of-range (e.g., disable the OK button)? A simple solution is to handle the EN_CHANGE notification.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

yes i am doing this in MFC. when it enters out of range it should pop up a message.. that can be done.

If you provided a handler for the EN_KILLFOCUS notification, you could do validation at the time the control loses focus. Still not an optimal solution IMO.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Can anybody tell me how to insert an icon in dialogue box ?

Regards,
Shaiju

in the resource editor add a picture control and set it's Type to Icon, then set the Image property to the ID of the icon...

You must use of LoadIcon for load icon and then use of SetIcon of course you need to a static control.

Can anybody explain me how to insert a Control Panel Icon in Edit box ?

Regards

Edit controls typically do not contain icons. What exactly are you trying to accomplish?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Hi ALL,

I am using Propertysheet class in my project in which I add number of
pages in it.

I want to acccess pointer of this propersheet in one menu function.

void
CMainFrame::OnOpenWebSite()
{

COpenWebSiteShet openWebSiteDlg;
// COpenWebSiteShet derived from CProperSheet class.
if(ID_WIZFINISH == openWebSiteDlg.DoModal())
{

COpenWebSiteShet *pSheet = (COpenWebSiteShet*)GetParent();

}

pSheet is always get NULL handle. So how can get the correct handle of
propertySheet in Mainframe class.

Thanks in Advance
Roll eyes | :rolleyes:

Om