1. onEvent, lparam structure parsing.
- Posted by jcowgar at bhsys.com
Nov 10, 2001
Greetings!
I have a question about recieving information from a WM_NOTIFY message. I am
creating a wrapper around a control and it sends lots of information via the
WM_NOTIFY message. All of it's information via the WM_NOTIFY message
contains the real stuff on lParam. On lParam is has a structure, and inside
the structure is another structure that contains the actual message. The C
structures look like:
struct NotifyHeader {
// hwndFrom is really an environment specifc window handle or pointer
// but most clients of Scintilla.h do not have this type visible.
//WindowID hwndFrom;
void *hwndFrom;
unsigned int idFrom;
unsigned int code;
};
struct SCNotification {
struct NotifyHeader nmhdr;
int position; // SCN_STYLENEEDED, SCN_MODIFIED, SCN_DWELLSTART,
SCN_DWELLEND
int ch; // SCN_CHARADDED, SCN_KEY
int modifiers; // SCN_KEY
int modificationType; // SCN_MODIFIED
const char *text; // SCN_MODIFIED
int length; // SCN_MODIFIED
int linesAdded; // SCN_MODIFIED
int message; // SCN_MACRORECORD
uptr_t wParam; // SCN_MACRORECORD
sptr_t lParam; // SCN_MACRORECORD
int line; // SCN_MODIFIED
int foldLevelNow; // SCN_MODIFIED
int foldLevelPrev; // SCN_MODIFIED
int margin; // SCN_MARGINCLICK
int listType; // SCN_USERLISTSELECTION
int x; // SCN_DWELLSTART, SCN_DWELLEND
int y; // SCN_DWELLSTART, SCN_DWELLEND
};
Can anyone help me or tell me where I can get information about parsing and
retrieving this information in my Euphoria program? I am using win32lib.
Thanks!
Jeremy Cowgar
2. Re: onEvent, lparam structure parsing.
- Posted by euman at bellsouth.net
Nov 12, 2001
----- Original Message -----
From: <jcowgar at bhsys.com>
Subject: onEvent, lparam structure parsing.
>
> Greetings!
>
> I have a question about recieving information from a WM_NOTIFY message. I
am
> creating a wrapper around a control and it sends lots of information via
the
> WM_NOTIFY message. All of it's information via the WM_NOTIFY message
> contains the real stuff on lParam. On lParam is has a structure, and
inside
> the structure is another structure that contains the actual message. The C
> structures look like:
>
> struct NotifyHeader {
> // hwndFrom is really an environment specifc window handle or pointer
> // but most clients of Scintilla.h do not have this type visible.
> file://WindowID hwndFrom;
> void *hwndFrom;
> unsigned int idFrom;
> unsigned int code;
> };
>
constant NMHDR_hwndFrom = 0,
NMHDR_idFrom = 4,
NMHDR_code = 8,
SIZEOF_NMHDR = 12
...in WinProc(atom hwnd, atom iMsg, atom wParam, atom lParam)
elsif iMsg = WM_NOTIFY then
id = peek4s(lParam + NMHDR_hwndFrom)
id would = the control that is sending the notification to the parent...
as for the stuff you have below, you'll need to grab a copy of the SDK and
start reading. Making this work with win32lib is going be a trick!
> struct SCNotification {
> struct NotifyHeader nmhdr;
> int position; // SCN_STYLENEEDED, SCN_MODIFIED, SCN_DWELLSTART,
> SCN_DWELLEND
> int ch; // SCN_CHARADDED, SCN_KEY
> int modifiers; // SCN_KEY
<snip....>
> Thanks!
Welcome
Euman
euman at bellsouth.net
>
> Jeremy Cowgar
3. Re: onEvent, lparam structure parsing.
Using the features of win32lib, you could define the 'structure' like
this...
-- struct SCNotification
constant
SCnmhdr_hwndFrom = allot(Long),
SCnmhdr_idFrom = allot(UInt),
SCnmhdr_code = allot(UInt),
SCposition = allot(Long),
SCch = allot(Long),
SCmodifiers = allot(Long),
SCmodificationType = allot(Long),
SCtext = allot(Lpsz),
SClength = allot(Long),
SClinesAdded = allot(Long),
SCmessage = allot(Long),
SCwParam = allot(UInt),
SClParam = allot(UInt),
SCline = allot(Long),
SCfoldLevelNow = allot(Long),
SCfoldLevelPrev = allot(Long),
SCmargin = allot(Long),
SClistType = allot(Long),
SCx = allot(Long),
SCy = allot(Long),
SIZEOF_SCNotification = alloted_size()
Once you get the address of this structure, presumably from the WM_NOTIFY
message, you can access its elements like this ...
atom lPosition, lLength
lPosition = fetch(addr, SCposition)
lLength = fetch(addr, SClength)
and so on...
-----------
Derek
----- Original Message -----
From: <jcowgar at bhsys.com>
To: "EUforum" <EUforum at topica.com>
Sent: Sunday, November 11, 2001 6:36 PM
Subject: onEvent, lparam structure parsing.
>
> Greetings!
>
> I have a question about recieving information from a WM_NOTIFY message. I
am
> creating a wrapper around a control and it sends lots of information via
the
> WM_NOTIFY message. All of it's information via the WM_NOTIFY message
> contains the real stuff on lParam. On lParam is has a structure, and
inside
> the structure is another structure that contains the actual message. The C
> structures look like:
>
> struct NotifyHeader {
> // hwndFrom is really an environment specifc window handle or pointer
> // but most clients of Scintilla.h do not have this type visible.
> //WindowID hwndFrom;
> void *hwndFrom;
> unsigned int idFrom;
> unsigned int code;
> };
>
> struct SCNotification {
> struct NotifyHeader nmhdr;
> int position; // SCN_STYLENEEDED, SCN_MODIFIED, SCN_DWELLSTART,
> SCN_DWELLEND
> int ch; // SCN_CHARADDED, SCN_KEY
> int modifiers; // SCN_KEY
> int modificationType; // SCN_MODIFIED
> const char *text; // SCN_MODIFIED
> int length; // SCN_MODIFIED
> int linesAdded; // SCN_MODIFIED
> int message; // SCN_MACRORECORD
> uptr_t wParam; // SCN_MACRORECORD
> sptr_t lParam; // SCN_MACRORECORD
> int line; // SCN_MODIFIED
> int foldLevelNow; // SCN_MODIFIED
> int foldLevelPrev; // SCN_MODIFIED
> int margin; // SCN_MARGINCLICK
> int listType; // SCN_USERLISTSELECTION
> int x; // SCN_DWELLSTART, SCN_DWELLEND
> int y; // SCN_DWELLSTART, SCN_DWELLEND
> };
>
> Can anyone help me or tell me where I can get information about parsing
and
> retrieving this information in my Euphoria program? I am using win32lib.
>
> Thanks!
>
> Jeremy Cowgar
>
>
>
>
