OpenEuphoria

1. Win32lib focus problem

• Posted by Alexander Toresson <toressonodakra at swipnet.se> Dec 05, 2004
• 606 views

Try this piece of code:

without warning
include win32lib.ew
integer main, mle, msgedit

main = create(Window, "Click in the one-line text-edit and press enter", 0, 200,
200, 500, 300, 0)

mle = create(MleText, "", main, 0, 0, 450, 100, 0)
msgedit = create(EditText, "", main, 0, 150, 450, 23, 0)

WinMain(main, Normal)

Pressing enter in the EditText will automatically give focus to the MleText!
Why?
I tried to do a work-around by setting the focus to the EditText when
receiving a VK_ENTER keypress. Didn't work. The focus was still set to
the MleText. Then I tried setting focus to the MleText. And that gave focus
to the EditText! Win32lib seems to mix them up. And this work-around
will stop working when this bug is fixed :(

Regards, Alexander Toresson

Shhh! Be vewy quiet! I'm hunting wuntime ewwows!

3. Re: Win32lib focus problem

• Posted by Alexander Toresson <toressonodakra at swipnet.se> Dec 05, 2004
• 559 views

Greg Haberek wrote:
> 
> > }}}
<eucode>
> > 
> > without warning
> > include win32lib.ew
> > integer main, mle, msgedit
> > 
> > main = create(Window, "Click in the one-line text-edit and press enter", 0,
> > 200, 200, 500, 300, 0)
> > 
> > mle = create(MleText, "", main, 0, 0, 450, 100, 0)
> > msgedit = create(EditText, "", main, 0, 150, 450, 23, 0)
> 
> I'm not sure why this happens, but add this, I tested it and it works.
> 
> }}}
<eucode>
> procedure msgedit_keypress( integer self, integer event, sequence params )
> 
>     if params[1] = VK_RETURN then
>         -- ignore the Enter key
>         returnValue(-1)
>     end if
> 
> end procedure
> setHandler( msgedit, w32HKeyPress, routine_id("msgedit_keypress") )
> </eucode>
{{{

> 
> > WinMain(main, Normal)
> > 
> > </eucode>
{{{

> 
> ~Greg
> 

I tried using that technique. However, I was still setting the focus to
the msgedit after that, having the effect of activating the mle.
Your solution works wonderfully

Regards, Alexander Toresson

Shhh! Be vewy quiet! I'm hunting wuntime ewwows!

5. Re: Win32lib focus problem

• Posted by CoJaBo <CoJaBo_EUforum_Address at CJBN.net> Dec 05, 2004
• 606 views

Derek Parnell wrote:
> 
> Alexander Toresson wrote:
> > 
> > Greg Haberek wrote:
> > > 
> > > > }}}
<eucode>
> > > > 
> > > > without warning
> > > > include win32lib.ew
> > > > integer main, mle, msgedit
> > > > 
> > > > main = create(Window, "Click in the one-line text-edit and press enter",
> > > > 0, 200, 200, 500, 300, 0)
> > > > 
> > > > mle = create(MleText, "", main, 0, 0, 450, 100, 0)
> > > > msgedit = create(EditText, "", main, 0, 150, 450, 23, 0)
> > > 
> > > I'm not sure why this happens, but add this, I tested it and it works.
> > > 
> > > }}}
<eucode>
> > > procedure msgedit_keypress( integer self, integer event, sequence params )
> > > 
> > >     if params[1] = VK_RETURN then
> > >         -- ignore the Enter key
> > >         returnValue(-1)
> > >     end if
> > > 
> > > end procedure
> > > setHandler( msgedit, w32HKeyPress, routine_id("msgedit_keypress") )
> > > </eucode>
{{{

> > > 
> > > > WinMain(main, Normal)
> > > > 
> > > > </eucode>
{{{

> > > 
> > > ~Greg
> > > 
> > 
> > I tried using that technique. However, I was still setting the focus to
> > the msgedit after that, having the effect of activating the mle.
> > Your solution works wonderfully
> > 
> 
> If you look up the documentation for EditText you will find ...
> 
> Note that when the user presses the Return Key, the focus will move to 
> the next control in the focus order. To prevent this from happening, you
> need to set a w32HKeyPress handler that sets the return value to -1 when
> a VK_RETURN key without shifts is received.
> 
> }}}
<eucode>
> procedure IgnoreReturn(integer self, integer event, sequence parms)
>     if parms[1] = VK_RETURN and parms[2] = 0 then
>         returnValue(-1)
>     end if
> end procedure
> setHandler(myEditField, w32HKeyPress, routine_id("IgnoreReturn"))
> </eucode>
{{{

> --------------------
> 
> I put this in because the common thing that people do when pressing
> Return in an Edit field is to think that they have finished with that
> field and now wants to deal with the next field. It is in effect the
> same as pressing Tab in the field.
> 
> But now that I can see that it could be awkward to change this behaviour
> in some circumstances, I will add a new property to controls so that
> you can use this behaviour (or not) on a per control basis.  
The current method shuold be the default since
some of my programs use it.

Also, why did this happen? "Then I tried setting focus
to the MleText. And that gave focus
to the EditText!"

> 
> 
> -- 
> Derek Parnell
> Melbourne, Australia
>

7. Re: Win32lib focus problem

• Posted by Alexander Toresson <toressonodakra at swipnet.se> Dec 06, 2004
• 591 views

Derek Parnell wrote:
<big snip> 
> But now that I can see that it could be awkward to change this behaviour
> in some circumstances, I will add a new property to controls so that
> you can use this behaviour (or not) on a per control basis.  
> 

Yeah, I'm developing a chat app, and it's not good if the message display
mle is activated when a user sends a message.

Regards, Alexander Toresson

Shhh! Be vewy quiet! I'm hunting wuntime ewwows!