C / C++ / MFC

8-Aug-07 15:35

GetModuleFileName()[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Get program name

Hamid_RT8-Aug-07 19:15

Hamid_RT

8-Aug-07 19:15

Do you want to know current name of your program or other programs?

WhiteSky

Change Window Color

WayneK1008-Aug-07 13:34

8-Aug-07 13:34

Isn't there an easy way, e.g. a CWnd base member function, that can be used to change a window's foreground or background color? I have two cases; in one I would like to change the background color of an edit control, in another I would like to change the color of a button. From what I have seen so far it seems like I have to create new classes derived from, in this case, the edit and button classes so that they can handle a WM_ERASE and do the necessary painting. I must not understand something because this seems way more complicated than it would seem and I don't want to head down the wrong path.

Thanks,

Wayne King

Mark Salsbery8-Aug-07 13:50

8-Aug-07 13:50

Edit control, easy. Button control, you're on your own Smile | :)

For edit controls, you can add a handler (in the parent dialog/window) for the WM_CTLCOLOR message.
In response to that message, return a handle to a brush that the system will use to paint the background.

Here's an example that sets all edit controls in a dialog to green text on red background:

// RedBrush is a CBrush member of CMyDialog
RedBrush.CreateSolidBrush(RGB(0xFF,0x00,0x00));
...
BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
    ON_WM_CTLCOLOR()
END_MESSAGE_MAP()
...
HBRUSH CMyDialog::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
    HBRUSH hbr = CMyDialog::OnCtlColor(pDC, pWnd, nCtlColor);

    if (nCtlColor == CTLCOLOR_EDIT)
    {
        pDC->SetTextColor(RGB(0x00,0xFF,0x00));
        pDC->SetBkColor(RGB(0xFF,0x00,0x00));

        hbr = RedBrush;
    }
   
    return hbr;
}

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

WayneK1008-Aug-07 15:20

8-Aug-07 15:20

So that would set ALL edit controls in CMyDialog to those colors? How can I set just one control; say one with an ID of IDC_ANAOFFSET?

Mark Salsbery8-Aug-07 15:31

8-Aug-07 15:31

One way would be:

    if (nCtlColor == CTLCOLOR_EDIT)
    {
        if (IDC_ANAOFFSET == ::GetWindowLong(*pWnd, GWL_ID))
        {

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

WayneK1009-Aug-07 5:17

9-Aug-07 5:17

Thanks. This and the previous reply are exactly what I needed. One more related question; what is the best way to cause a WM_COLOR (or something that kicks the OnCtlColor handler) message to be sent? Specifically, I need to cause color changes when certain events occur. So, the event handlers need to cause the OnCtlColor handler to run and perform the color change. Is SendMessage the best way to do that or something else?

Wayne

Mark Salsbery9-Aug-07 5:45

9-Aug-07 5:45

I would just use Invalidate().

Set a flag or whatever you use to indicate what color it should be then use Invalidate() to mark a
window for repainting. You can call it on a specific control or an entire dialog/window:

// Mark MyEditCtl for repainting
MyEditCtl.Invalidate(TRUE);

For situations where you need the repaint to occur immediately, you can follow the Invalidate()
call with UpdateWindow(). For UI controls this generally isn't necessary.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Mark Salsbery9-Aug-07 5:47

9-Aug-07 5:47

Also, note that for buttons, the same messages apply BUT for pushbuttons, the button has to be
owner drawn for it to have any effect.

It's not as simple as with edit controls Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

WayneK10010-Aug-07 5:01

10-Aug-07 5:01

Well (hopefully) one more question. The color change works when the edit control is NOT in read-only mode. However what I really want is for it to be in read-only mode. When in read-only the OnCtlColor handler never gets called for the control that I want to change. How do I get around that?

Wayne King

Mark Salsbery10-Aug-07 5:50

10-Aug-07 5:50

When the edit control is in read-only mode, the WM_CTLCOLOR message, the control
type is CTLCOLOR_STATIC so you can add something like this to your OnCtlColor
handler:

   else if (nCtlColor == CTLCOLOR_STATIC)
   {
      ...

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

WayneK10010-Aug-07 6:19

Re: Change Window Color [modified]

10-Aug-07 6:19

Thanks again. That did it. You have been immensely helpful. I have still another sort-of related question. How do you change the text font? Is there a difference in methods depending upon whether it's an edit or button control? I've searched the message board, microsoft, etc. but can't seem to hit on the right criteria to find an answer.

Thanks again,

Wayne

Mark Salsbery10-Aug-07 6:32

10-Aug-07 6:32

You're welcome Smile | :)

To set the font, create a font and call SetFont() on the control to set its font.

Example:

// Add to dialog class
CFont m_EditFont;
...
// In dialog class constructor create the desired font
m_EditFont.CreateFont.... 
...
// In OnInitDialog, after calling the base class OnInitDialog
MyEdit.SetFont(&m_EditFont);

Mark

*edit* fixed a sample code typo

Last modified: 11mins after originally posted --

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

WayneK10010-Aug-07 8:44