how to return value after user input
-
well sir, i am just learning and doing work. i don't have much idea about it. so i request for help. i am trying this from all most a week. i google it and did not found simillar to what i am looking for. maybe because i don't have enough knowledge. so.. hoping to get help from some kind heart.
Member 2119844 wrote:
hoping to get help from some kind heart.
Which is what I offered to you yesterday. Use the features of the CDialog and its controls rather than struggling to try and interpret individual keystrokes that are already captured for you. Text boxes have events that you can capture as characters are entered into them, which allow you to check and/or modify their content. The CDialog class has a function that will capture or refresh all the data between the dialog and the associated class variables etc.
One of these days I'm going to think of a really clever signature.
-
Member 2119844 wrote:
hoping to get help from some kind heart.
Which is what I offered to you yesterday. Use the features of the CDialog and its controls rather than struggling to try and interpret individual keystrokes that are already captured for you. Text boxes have events that you can capture as characters are entered into them, which allow you to check and/or modify their content. The CDialog class has a function that will capture or refresh all the data between the dialog and the associated class variables etc.
One of these days I'm going to think of a really clever signature.
Dear sir, i really appreciate your and Santhosh suggestion. i do. but the thing is bit difference what i am looking for. maybe i am not able to describe very well, what i am looking for. sorry for that. because my English is not good enough. so please don't get me wrong. once again i am trying to explain what i need to do. and what i come up to. i need to make function that return value after press Enter key. not directly and not in any other way. but from function when it call from outer class. this is the event when user press button in dlg class.
void CRetValTestDlg::OnGetString()
{
m_TxInput.InFlag = false;
CString s = m_TxInput.GetString();
m_TxOutput.SetWindowText (s);
}and this is CMyTextBox calss member function which is call from dlg class on button press. which need to return value.
CString CMyTextBox::GetString()
{
if (InFlag == true)
return RetVal;
return "";
}now i have come upto this
CString CMyTextBox::GetString()
{
while (InFalg != true) // this is infinite loop but
{
DoEvents(); // doEvents hole for it so it wait until it get event
if (InFlag == true) // the InFlag = true when user press Enter;
return RetVal; // and return value
}
return ""; // else return "";
}this is work. but when i use While and DoEvents the processor took lot of work. it took all most 50% of CPU used. and which is really not good. i think. and some time it does not come out from that loop when user left so when the program close. it remain in task manager. and CUP running. now What i am looking for is -> is there any other way to wait till event. maybe using CEvent or CallBack or threading or something else. without using lot of CPU used. because i don't know anything about them. i have never use.
CString CMyTextBox::GetString()
{
//====================== Here i am looking for help =============================
// wait for event here or WaitTill (InFlag !=true); in this line i need help.
//==================================================================================
if (InFlag == true)
return RetVal;
return "";
}i hope this time i could able to tell what i need for. this is really important for me. so Please Please Help.
-
Dear sir, i really appreciate your and Santhosh suggestion. i do. but the thing is bit difference what i am looking for. maybe i am not able to describe very well, what i am looking for. sorry for that. because my English is not good enough. so please don't get me wrong. once again i am trying to explain what i need to do. and what i come up to. i need to make function that return value after press Enter key. not directly and not in any other way. but from function when it call from outer class. this is the event when user press button in dlg class.
void CRetValTestDlg::OnGetString()
{
m_TxInput.InFlag = false;
CString s = m_TxInput.GetString();
m_TxOutput.SetWindowText (s);
}and this is CMyTextBox calss member function which is call from dlg class on button press. which need to return value.
CString CMyTextBox::GetString()
{
if (InFlag == true)
return RetVal;
return "";
}now i have come upto this
CString CMyTextBox::GetString()
{
while (InFalg != true) // this is infinite loop but
{
DoEvents(); // doEvents hole for it so it wait until it get event
if (InFlag == true) // the InFlag = true when user press Enter;
return RetVal; // and return value
}
return ""; // else return "";
}this is work. but when i use While and DoEvents the processor took lot of work. it took all most 50% of CPU used. and which is really not good. i think. and some time it does not come out from that loop when user left so when the program close. it remain in task manager. and CUP running. now What i am looking for is -> is there any other way to wait till event. maybe using CEvent or CallBack or threading or something else. without using lot of CPU used. because i don't know anything about them. i have never use.
CString CMyTextBox::GetString()
{
//====================== Here i am looking for help =============================
// wait for event here or WaitTill (InFlag !=true); in this line i need help.
//==================================================================================
if (InFlag == true)
return RetVal;
return "";
}i hope this time i could able to tell what i need for. this is really important for me. so Please Please Help.
All I can do is repeat what I said before. Use the events and notifications of the
CDialogclass. The default action when user presses the enter key is to call theOnOK()function. You add code to that method to capture the text using theUpdateData()function. Let the dialog do the work for you. Maybe you should spend some time reading the documentation about Dialog Boxes[^] in general, and theCDialog[^] class in particular. You may also find that the documentation is available in your own language.One of these days I'm going to think of a really clever signature.
-
All I can do is repeat what I said before. Use the events and notifications of the
CDialogclass. The default action when user presses the enter key is to call theOnOK()function. You add code to that method to capture the text using theUpdateData()function. Let the dialog do the work for you. Maybe you should spend some time reading the documentation about Dialog Boxes[^] in general, and theCDialog[^] class in particular. You may also find that the documentation is available in your own language.One of these days I'm going to think of a really clever signature.
ok i will try. but. as you said. >> Use the events and notifications of the CDialog class. Which Events and Notification? i use this to block call OnOk() while press Enter Key.
BOOL CRetValTestDlg::PreTranslateMessage( MSG* pMsg )
{
if (pMsg->message == WM_KEYDOWN)
{
if ((pMsg->wParam == VK_RETURN) || (pMsg->wParam == VK_ESCAPE))
pMsg->wParam = NULL;// VK_TAB;
}return CDialog::PreTranslateMessage( pMsg );}
how dialog do my work. it would be great if i could get some sample code. i have spend lot of time to read and search. i did not find or i did not understand. so i request for help. if i understand, i may not request for help.
-
ok i will try. but. as you said. >> Use the events and notifications of the CDialog class. Which Events and Notification? i use this to block call OnOk() while press Enter Key.
BOOL CRetValTestDlg::PreTranslateMessage( MSG* pMsg )
{
if (pMsg->message == WM_KEYDOWN)
{
if ((pMsg->wParam == VK_RETURN) || (pMsg->wParam == VK_ESCAPE))
pMsg->wParam = NULL;// VK_TAB;
}return CDialog::PreTranslateMessage( pMsg );}
how dialog do my work. it would be great if i could get some sample code. i have spend lot of time to read and search. i did not find or i did not understand. so i request for help. if i understand, i may not request for help.
I don't know what you are hoping to achieve with the code above, but it is not likely to help you. Please spend some time reading the two links I gave in my previous answer, so you understand how dialogs operate.
One of these days I'm going to think of a really clever signature.
-
I don't know what you are hoping to achieve with the code above, but it is not likely to help you. Please spend some time reading the two links I gave in my previous answer, so you understand how dialogs operate.
One of these days I'm going to think of a really clever signature.
Thank you.
-
Hi All, i need to return input value after press enter. how to make it. need little help. the main think here that i have to make function that return value after press Enter. here is link of project file. https://skydrive.live.com/redir?resid=78B222720843DE16!116&authkey=!AAjKOKZHSd-q9lI i have a dialog box with 2 EditBox (m_TxInput and m_TxOutPut) and 2 Button for (GetString and GetNumber) i made class CMyTextBox for m_TxInput . here is code below. i have 2 function GetString and GetNumber in CMyTextBox Class. i am calling these function on button down in dlg.
/////////////////////////////////////////////////////////////////////////////
// CMyTextBox windowclass CMyTextBox : public CEdit
{
// Construction
public:
CMyTextBox();// Attributes
public:// Operations
public:bool InFlag; // After Press Enter InFlag = true; CString RetVal; // store return value// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMyTextBox)
//}}AFX_VIRTUAL// Implementation
public:
CString GetString();
double GetNumber();
virtual ~CMyTextBox();// Generated message map functionsprotected:
//{{AFX_MSG(CMyTextBox)
afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
//}}AFX_MSGDECLARE\_MESSAGE\_MAP()};
// CPP file======================================================
// CMyTextBox message handlers
void CMyTextBox::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// TODO: Add your message handler code here and/or call default
if (nFlags == 28) // Enter press
GetWindowText(RetVal);
CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
}double CMyTextBox::GetNumber()
{
// how to get return here after press enter by user
if (InFlag == true)
return atof(RetVal);
return 0;
}CString CMyTextBox::GetString()
{
// how to get return here after press enter by user
if (InFlag == true)
return RetVal;
return "";
}Thanks Amrit
By default, a dialog's
OnOK()handler will be called when you "press" the Enter key from within an edit control. If you would rather the edit control do something else, check out theES_WANTRETURNstyle."One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous