Re: Password Prompt - How?
Louis,
Have you checked out Judith's IDE?
Dan Moyer
----- Original Message -----
From: <Louis at cwshop.com>
To: "EUforum" <EUforum at topica.com>
Subject: Re: Password Prompt - How?
>
>
> Thanks, Derek. I had come to the conclusion that Win32Lib was "thin",
meaning that it didn't hide much of Microsoft's underlying structure, as
opposed to a language like Visual Basic which presents a completely
different model of Windows programming. I had asked before about a Windows
Programming reference, but got no reply then. Since I am unfamiliar with
Windows programming, I am relying completely on your Win32Lib documentation
and the examples. I knew I needed a more extensive reference.
>
> To answer your question, I had assumed that if I set up handlers and ran
WinMain() and windows opened, I could close the window and do it again.
When that didn't work, I set up handlers for the password window and called
openDialog() without calling WinMain(). The documentation seemed to
indicate it would obey the handlers and wait for input, but it didn't. Your
technique is clearly the right way, I just don't (yet) have a proper
reference for Windows programming, so I greatly appreciate your help.
>
> To change the subject, I am impressed with the ease with which Euphoria
programs can be written, though Windows programming is a bit more difficult.
Has anyone put some thought in to a "Visual Euphoria" library which supports
Windows programming in a simplified way? I'm thinking of a Window Designer
program which the programmer uses to graphically arrange his fields,
checkboxes, etc. It then creates an include file which supports simple
calls like this:
>
> sResults = wPassword({default values, optional parms}) -- Opens a window
to prompt for a password
> sPW = GetField(sResults, "pw") -- Extract the value of a field from the
sResults sequence
> ...
> sResults = wMaininput({default values, optional parms}) -- Opens a window
data entry form
> sName = GetField(sResults, "name")
> sAdr = GetField(sResults, "adr")
> sPhone = GetField(sResults, "phone")
> sButton = GetButton(sResults) -- Determine which button caused the window
to close, eg. OK, Cancel, etc.
> ...
>
> wPassword and wMaininput are previously defined window forms.
> sResults is a compound sequence (structure) which receives the output of
the window.
> Optional parms could control which field got initial focus, provide the
ability to leave the window open for a specified time, then close it
automatically, etc.
>
> At the moment, I haven't thought about how these windows could be
interactive (e.g. validity checking), but much could be accomplished by a
simple input window, and this model seems more Euphoria-like.
>
> Louis.
>
> *********** REPLY SEPARATOR ***********
>
> On 10/1/2003 at 6:37 AM Derek Parnell wrote:
>
> >
> >----- Original Message -----
> >From: <Louis at cwshop.com>
> >To: "EUforum" <EUforum at topica.com>
> >Sent: Wednesday, October 01, 2003 4:08 AM
> >Subject: Re: Password Prompt - How?
> >
> >
> >> OK, The secret undocumented control ES_PASSWORD works.
> >
> >It is documented, just not in the stuff I supply with win32lib. It is a
> >standard flag supplied by Microsoft and its documented in the hundreds of
> >books about Windows programming AND in the Microsoft SDK. These flags are
> >not dreamed up by myself - they are what Microsoft have decided upon.
> >
> >>Now another question.
> >>
> >> I understand how to set up handlers and call WinMain(). I have
> >>always assumed that when the window is closed, WinMain() returns
> >>and execution resumes. That's where I close the database.
> >
> >True, execution does continue after WinMain() returns, but no more calls
> >to win32lib code should execute. Closing the database here is okay to do.
> >
> >>I tried to use a second WinMain() to open another window and found
> >>that it didn't work. Then I found WinMain is documented that
> >>when it closes, the application also closes.
> >
> >Well, more specifically, when WinMain returns, all the windows have been
> >destroyed and resources returned to Windows. The application is expected
> >to end and no further calls to routines inside win32lib are permitted.
> >
> >Why did you try to call WinMain again, after it had returned?
> >
> >>I tried openDialog,
> >>which says it activates handlers and waits for input. It
> >>doesn't. It flashes the window on the screen and closes it
> >>immediately.
> >
> >Is this after WinMain had returned?
> >
> >> What I am trying to do is open a window to prompt for a password.
> >>The user types in the EditText field and clicks an "OK" button
> >>(or presses Enter). The window closes and if the password was
> >>correct, the main application window opens. (Has anyone seen
> >>example code?) I'm not asking someone to write this for me,
> >>just give me some hints as to what functions to use.
> >
> >The w32HOpen event is invoked just PRIOR to a window being opened. You
can
> >use this event to show your password form and process the user's
> >interaction with it before the main window is displayed.
> >
> >procedure Open_MainWin(integer self, integer event, sequence parms)
> > openDialog(PasswordForm)
> >end procedure
> >setHandler(MainWin, w32HOpen, routine_id("Open_MainWin"))
> >
> >Is that enough of a hint? 
> >
> >And by the way, the w32HActivate event occurs AFTER the window is opened.
> >
> >> Where would I find things like ES_PASSWORD documented?
> >>Would this be in a "Windows Programming" text?
> >
> >Oh yes. There are thousands of special symbol names used when
programming
> >for Windows and I do not intend to repeat their documentation in the
stuff
> >I release with win32lib. The Microsoft documenation is already in the
> >public domain at http://msdn.microsoft.com and the many Windows
> >programming books. I recommend the book called "Windows Programming" by
> >Charles Pretzold for API level programming, and "About Face, The
> >Essentials of User Interface Design" by Alan Cooper for how make GUI
> >programming effective.
> >
> >--
> >Derek
>
>
>
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>
>
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