Re: Getting owner draw child control to paint when calling SetWindowText

From:

"Jonathan Wood" <jwood@softcircuits.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 18 Apr 2008 11:49:27 -0600

Message-ID:

<#AkfNyXoIHA.524@TK2MSFTNGP05.phx.gbl>

Sorry, as I didn't understand some of the details of what you described. But
the answer is that the dialog will not tell your control to repaint.

If you have a SetWindowText() method on your class (or rather an override of
the handler) then that would be the place to invalidate the window.

--
Jonathan Wood
SoftCircuits Programming
http://www.softcircuits.com

"J M" <j_mill@jersymail.co.uk> wrote in message
news:uJ26TvXoIHA.3900@TK2MSFTNGP05.phx.gbl...

Hi,

I have an owner draw static class. DrawItem is called (and works ok) when
the dialog repaints, i.e. initially and when restored, but my class
DrawItem
is not called when SetWindowText is called.

Is there some way to get a dialog to request an owner draw child control
to
paint itself other than calling Invalidate() and UpdateWindow() in the
dialog class (which draws all the controls and in my app results in an
endless loop as the static text is changed by a slider control)?

TIA

Jan

Some detail omitted for clarity:

class ColorStatic : public CStatic
{
public:

ColorStatic();
~ColorStatic();

CFont m_TextFont;
COLORREF m_rgbTextColor;

virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);

protected:

virtual void PreSubclassWindow();
};

void ColorStatic::DrawItem(LPDRAWITEMSTRUCT /*lpDrawItemStruct*/)
{
CPaintDC dc(this); // lpDrawItemStruct unused so we can call DrawItem
directly if needed

HFONT hOldFont = (HFONT) dc.SelectObject(m_TextFont);

dc.SetMapMode(MM_TEXT);
dc.SetTextAlign(TA_TOP | TA_LEFT);
dc.SetBkMode(TRANSPARENT);
dc.SetTextColor(m_rgbTextColor);

CString strText;

GetWindowText(strText);

dc.TabbedTextOut(0, 0, strText, 0, NULL, 0);

dc.SelectObject(hOldFont);
}