OpenEuphoria

Re: Win32Lib setHandler() suggestion

• Posted by tone.skoda at gmx.net Jun 10, 2002
• 404 views

Thanks, I was using old version.

----- Original Message -----
From: "Derek Parnell" <Derek.Parnell at SYD.RABOBANK.COM>
To: "EUforum" <EUforum at topica.com>
Subject: RE: Win32Lib setHandler() suggestion


>
> Tone,
> v0.57+ can be used to create a chain of handlers for a control.
>
> example:
>
>   -- Set a chain of handlers.
>   setHandler( btn1, w32HClick, routine_id("click_buttons"))
>   if DebugSwitch = True then
>       -- add a second routine to be called.
>       setHandler( btn1, w32HClick, routine_id("Debugger"))
>   end if
>
> The routines are called in the same order as they are set.
>
> To remove the current handler(s) for a control, set it to -1.
>
> example:
>   setHandler( btn1, w32HClick, -1)
>
> To replace the current handler(s) for a control, set it the first one
to -1.
>
> example:
>   setHandler( btn1, w32HClick, {-1, routine_id("Special_Click"))
>
>
> To add a handler at the beginning of the chain use getHandler first...
>
> example:
>        object hl
>        -- Make sure my handler is installed before any others.
>        -- First, get the current handlers.
>        hl = getHandler(myWindow, w32HPaint)
>        -- Chain mine to the front.
>        setHandler(myWindow, w32HPaint, -1 & routine_id("mypainter") & hl)
>
> -----------
> Derek.
> > -----Original Message-----
> > From: tone.skoda at siol.net [mailto:tone.skoda at siol.net]
> > Sent: Sunday, 9 June 2002 11:13
> > To: EUforum
> > Subject: Win32Lib setHandler() suggestion
> >
> >
> >
> > When you set two event handlers for same control
> > first one is deleted.
> > It would be better and more simple
> > if both would be called
> > when the event happens.
> >
> > This would be especially useful
> > for writing custom controls,
> > like custom drawn treeview.
> >
> > Or is it already working like that? :^)
> >
> >
> >
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