Color for Edit Box

[nyjil]

With the help of Zaki, I managed to get a long way into my problem, but I'm stumbling on something. What I want to do is to have an edit-box control display a number in a different color. The edit-box is a 'read only', and merely displays information to the user. I want that number to become red when it gets 'too low'. I still want all of the rest of the functionality that an edit box offers. How do I do this? Some sample code would be wonderful if you have the time.

Many Thanks
Nyjil

 

[MSamoila]

Here is the SDK code for a dialog box which has a read only edit box with ID IDC_EDIT1:

// Mesage handler for the dialog box.
LRESULT CALLBACK DialogProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
  static HWND hWndEdit;
  switch (message)
  {
  case WM_INITDIALOG:
	hWndEdit = GetDlgItem(hDlg, IDC_EDIT1);
	SetWindowText(hWndEdit, _T("100"));
	return TRUE;
  case WM_CTLCOLORSTATIC:
    if((HWND)lParam == hWndEdit)
    {
	SetTextColor((HDC)wParam, RGB( 255, 0, 0));
	SetBkColor((HDC)wParam, GetSysColor(COLOR_3DFACE));
	return (LRESULT)GetSysColorBrush(COLOR_3DFACE);
    }
    return FALSE;	//call DefWindowProc 
  case WM_COMMAND:
    if (LOWORD(wParam) == IDOK ||
        LOWORD(wParam) == IDCANCEL) 
    {
	EndDialog(hDlg, LOWORD(wParam));
	return TRUE;
    }
    break;
  }
  return FALSE;
}

Marius Samoila
Brainbench MVP for Visual C++

http://www.brainbench.com

 

[sparafucile17]

Marius,

I see what you are doing here, but where do you put this code? And how do you call it? This LRESULT funct has to go somewhere right? And do I call it from my OnInitDialog() funct?

Please Advise,
Jeff

 

[Jeffray]

the easy way is :

override the WM_CTLCOLOR message handler to your dialog class and make the modification ( let's say your id for edit box is IDC_EDIT1 and m_value is connect to it through DDX):

HBRUSH CEditDlgDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

if (nCtlColor == CTLCOLOR_STATIC && pWnd->GetDlgCtrlID() == IDC_EDIT1)
if (m_Value < 100) pDC->SetTextColor(RGB(255,0,0)); // red
else pDC->SetTextColor(RGB(0,0,0)); // black
}
return hbr;
}