How to access member variable of parent dialog?

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I have a member variable

NOTIFYICONDATA niData;

in my parent dialog to display system tray.

And I have a child dialog Student on that I have one AddStudent button

I wanted to use niData in my click event of AddStudent to display bollon i.e.
" New Student added..."

How do I do that?

What I have tried:

void CStudent::SaveData()
{
	Student s1;
	CString sname,id,sclass,m;
	m_txtStudentName.GetWindowTextW(sname);
	m_txtStudentId.GetWindowTextW(id);
	m_txtClass.GetWindowTextW(sclass);

	sprintf(s1.sname,"%S",sname);
	sprintf(s1.id,"%S",id);
	sprintf(s1.sclass,"%S",sclass);
	
	bool flag=ValidateData(s1,&m);

	if(flag)
	{
		CFile write(L"student.txt",CFile::modeCreate|CFile::modeReadWrite|CFile::modeNoTruncate);
		write.SeekToEnd();
		write.Write(&s1,sizeof(s1));
		write.Close();
		LoadDataToList();
		ClearFields();
		//Here I wanted to access niData which is declared in parent dialog to show system tray bollon that "New Student added"

	}
	ShowMessage(m);
	
}


void CStudent::OnBnClickedAdd()
{
	// TODO: Add your control notification handler code here
	SaveData();
	
}

Posted 17-Feb-17 17:37pm

Premnath Mali

Updated 17-Feb-17 22:06pm

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2 solutions

Solution 2

From the save data I passed message to the parent Dialog

GetParent()->SendMessage(WM_USER + 558);

And in parent Dialog I caught that message and handle that

ON_MESSAGE(WM_USER+558, OnStudentAdd)

LRESULT CDialogControlDlg::OnStudentAdd(WPARAM wparam, LPARAM lparam)
{
	_tcscpy(niData.szInfoTitle,L"New Record Inserted!");
	_tcscpy(niData.szInfo,L"New Student Added.....");
	niData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP |NIF_INFO;
	niData.uTimeout=500;
	Shell_NotifyIcon(NIM_MODIFY, &niData);
	return 0;
}

Posted 17-Feb-17 22:06pm

Premnath Mali

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OriginalGriff · Accepted Answer · 2017-02-17T19:56:00

Solution 1

Don't do it that way - it restricts the child to only work with a specific parent, and that's very bad design, and very bad OOPs.
Instead, add an event to your child dialog that the parent can handle. The child raises the event "Student added" and the parent does what it wants with the information.

Posted 17-Feb-17 19:56pm

OriginalGriff

Comments

Premnath Mali 18-Feb-17 4:01am

Thanks !!!