Hi Folks,
This is my first question to the group, so hopefully I will provide all the
required information.
I'm attempting to build a small programmer interface for Win32 using gcc
under cygwin. Along with gcc, I have been using gdb running under ddd for
symbolic debugging.
The application is to be based on a dialog box (form) type and so far, I
have put in some pushbuttons and a couple of combobox dropdown lists using
the resource file:
#include "windows.h"
#include "resource.h"
IDD_MYDIALOG DIALOG 6, 21, 153, 88
STYLE DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
CAPTION "Programmer"
FONT 8, "Arial"
BEGIN
DEFPUSHBUTTON "FILE LOAD", ID_FILE_OPEN, 3, 2, 70, 14, WS_TABSTOP
DEFPUSHBUTTON "PROGRAM", ID_PROGRAM, 3, 19, 70, 14, WS_TABSTOP
DEFPUSHBUTTON "VERIFY", ID_VERIFY, 3, 36, 70, 14, WS_TABSTOP
DEFPUSHBUTTON "BLANK CHECK", ID_BLANK, 3, 53, 70, 14, WS_TABSTOP
DEFPUSHBUTTON "QUIT", ID_QUIT, 3, 70, 70, 14, WS_TABSTOP
COMBOBOX ID_PORT, 78, 2, 70, 14, CBS_DROPDOWN | WS_TABSTOP
COMBOBOX ID_DEVICE, 78, 15, 70, 14, CBS_DROPDOWN | WS_TABSTOP
LTEXT "Select File to Download into MCU", ID_STATUS, 78, 28, 70, 56,
WS_BORDER
END
To Update the "ID_PORT" comboboxes, I use the following WM_INITDIALOG code:
SendMessage(hdlgPortListCtrl, CB_ADDSTRING, 0, (LPARAM)(LPCTSTR)
TEXT("COM1:"));
SendMessage(hdlgPortListCtrl, CB_ADDSTRING, 0, (LPARAM)(LPCTSTR)
TEXT("COM2:"));
SendMessage(hdlgPortListCtrl, CB_ADDSTRING, 0, (LPARAM)(LPCTSTR)
TEXT("COM3:"));
SendMessage(hdlgPortListCtrl, CB_SETCURSEL, 0, 0);
The resource file and program file compile without any problems using the
following two statements:
windres Programmer.rc -O coff -o Programmer.res
gcc -mwindows -mno-cygwin -g -o Programmer.exe Programmer.c
Programmer.res -lgdi32 -luser32
When I click on the dropdown button on either one of the comboboxes, nothing
happens unless I double click in which case the initial text is highlighted
with a blinking cursor at the end. Along with this, when I press the "Tab"
key, the focus does not change from button, or control to the next one. As
I mention below, I have seen one instance of a problem with the combobox on
the list but none on the list indicate the issues with the problem with
tabbing.
To try and find the problem, I ran the resource file through Microsoft's
rc.exe and attempted to bind it to a compiled version of "Programmer.c"
(using the same gcc statement above with "Programmer.res" removed) using
rsrc but I end up with a "Checksum Field != 0" error (which I can't find any
explanation of).
I did a bit level compare on the windres produced .res file and the rc
produced .res file and found that in one of the combobox controls
(ID_DEVICE), the bit pattern was different:
rc:
da 07 ff ff 85 00 00 00 00 00 00 00 00 00 82 50 00 00 00 00 4e 00 1c 00 46
00 38 00
windres:
da 07 ff ff 85 00 00 00 00 00 00 00 00 00 80 50 00 00 00 00 4e 00 1c 00 46
00 38 00
The ID_PORT combobox control's bit pattern was identical between the two
versions.
I changed the corresponding windres .res file to the Microsoft rc .res file
and re-ran the gcc statement above with no difference.
I've just updated my tools to the latest levels from cygwin.com and when I
check the versions of windres and gcc, I get:
$ windres --version
GNU windres 2.14.90 20030901
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License. This program has absolutely no warranty.
$ gcc --version
gcc (GCC) 3.3.1 (cygming special)
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Looking through the archives, I've noticed that Danny Smith, earlier this
year, has encountered a problem and a potential patch for the windres
processing the combobox under the thread:
"Fix a windres (rcparse.y) parsing bug for controls without text fields"
Hopefully somebody can either:
1. Tell me this is a problem with windres
2. Point out what I am doing wrong
3. Explain what I'm doing wrong with rc.exe so I can dispense with windres
altogether
so I can stop tearing my hair out.
Thanx for your consideration and help!
myke
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