Hi,
I have subclassed an edit control so that I can control it's colouring - in
particular when it is disabled - copied below.
I perform the colouring and text output (DrawText() ) in an overridden
WM_PAINT.
The colours work fine, however I can't get the text to be the same size as
the text in other edit controls on the dialog which are default size, it is
slightly bigger.
I have tried to GetDC for the dialog and create a font from that but the
textmetrics returned are of the slightly bigger size.
I have tried to see what happens if I use the dc from certain windows
messages that send a dc eg:
WM_CTLCOLOREDIT and WM_CTLCOLORSTATIC but they are not received by the
subclass.
All I seem to receive are WM_PAINT and WM_ERASEBACKGROUND and WM_DESTROY -
the control properties is set to disabled state.
I can set the font successfully in the WM_PAINT for the control with a
hard-coded font size, but I want to automatically have the font sizes equal.
TIA for any ideas.
// ClrCtlProc: this is the subclass procedure for colouring the edit control
LRESULT CALLBACK ClrCtlProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{ HGLOBAL hglob = (HGLOBAL)GetProp(hwnd,_T("clrref_dat"));
if (hglob==NULL)
return DefWindowProc(hwnd,msg,wParam,lParam);
TClrData *oud=(TClrData*)GlobalLock(hglob); TClrData ud=*oud;
GlobalUnlock(hglob); // I made a copy of the structure just so I could
GlobalUnlock it now, to be more local in my code
switch (msg)
{ case WM_DESTROY:
{ RemoveProp(hwnd,_T("clrref_dat")); GlobalFree(hglob);
if (ud.url!=0) delete[] ud.url;
// nb. remember that ud.url is just a pointer to a memory block. It might
look weird
// for us to delete ud.url instead of oud->url, but they're both equivalent.
if(ud.hb)
DeleteObject(ud.hb);
} break;
case WM_ERASEBKGND:
return (LRESULT)1; // Say we handled it.
case WM_PAINT:
{
if(IsWindowEnabled(hwnd))//use default processing
break;
PAINTSTRUCT ps;
HDC dc=BeginPaint(hwnd, &ps);
// Paint(hWnd, &ps);
// HFONT hFont = gMenuBarFontStandardNumbers;
// Erase the background.
//
RECT rc;
GetClientRect(hwnd, &rc );
FillRect(dc, &rc, ud.hb);
SetBkMode(dc, TRANSPARENT);
DrawText(dc,ud.url, -1, &rc, DT_SINGLELINE|DT_CENTER|DT_VCENTER);
//Restore the old font
// SelectObject(dc, hOldFont); // deselect hF (if selected)
EndPaint(hwnd, &ps);
}
break;
}
return CallWindowProc(ud.oldproc,hwnd,msg,wParam,lParam);
}
