How to auto resize the text control in mfc - c++

Question

I want to put the text in my IDC_TEXT in MFC. I want to auto resize that control with input text. I used my code but it does not work. Could you help me resolve it?
CFont *m_Font1 = new CFont;
CStatic * m_Label;
m_Font1->CreatePointFont(200, "Time New Roman");
m_Label = (CStatic *)GetDlgItem(IDC_TEXT);
m_Label->SetFont(m_Font1);
m_Label->SetWindowText( _T("") );
//Display text in thread
THREADSTRUCT* ts = (THREADSTRUCT*)param;
CDC* vDC_TXT;
vDC_TXT =ts->_this->GetDlgItem(IDC_TEXT)->GetDC();
ts->_this->GetDlgItem(IDC_TEXT)->SetWindowTextA(text.c_str());
//Update the length-
ts->_this->GetDlgItem(IDC_TEXT)->SetWindowPos(NULL, 0, 0, 1000, 1000, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER);
However, the number (1000,1000) is set by my hand. I want to auto change based on the text size. Could you have me to solve it?

Answer 1

Update:
If font size is the same, and only text is different, then you should be able to reuse the old font:
void ChangeSize()
{
CWnd* dlgItem = GetDlgItem(IDC_STATIC1);
if (!dlgItem)
return;
CString s;
dlgItem->GetWindowText(s);
CDC dc;
dc.CreateCompatibleDC(NULL);
dc.SelectObject(dlgItem->GetFont());
CRect r;
dlgItem->GetClientRect(&r);
if (s.Find('\n') < 0)
dc.DrawText(s, &r, DT_CALCRECT | DT_NOPREFIX | DT_SINGLELINE | DT_EDITCONTROL);
else
dc.DrawText(s, &r, DT_CALCRECT | DT_NOPREFIX | DT_EDITCONTROL);
dlgItem->SetWindowPos(0, 0, 0, r.Width(), r.Height(), SWP_NOMOVE);
}
Previous answer for when font is changing:
m_Font1 should be declared as member data and setup setup once, and created and cleaned up elsewhere. It think that's what you are doing.
Then you can draw text functions to find text size, and resize the control as follows
void ChangeSize()
{
CWnd* dlgItem = GetDlgItem(IDC_STATIC1);
if (!dlgItem)
return;
CString s;
dlgItem->GetWindowText(s);
CDC dc;
dc.CreateCompatibleDC(NULL);
//or just use CClientDC dc(this) if device context is available
dc.SelectObject(m_font);
CRect r;
dlgItem->GetClientRect(&r);
if (s.Find('\n') < 0)
{
//change width/height for single line text
dc.DrawText(s, &r, DT_CALCRECT | DT_NOPREFIX | DT_SINGLELINE | DT_EDITCONTROL);
}
else
{
//change height for multiple-line text
dc.DrawText(s, &r, DT_CALCRECT | DT_NOPREFIX | DT_EDITCONTROL);
}
dlgItem->SetWindowPos(0, 0, 0, r.Width(), r.Height(), SWP_NOMOVE);
dlgItem->SetFont(m_font, 1);
}